Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Kernel-based Virtual Machine driver for Linux |
| 3 | * |
| 4 | * derived from drivers/kvm/kvm_main.c |
| 5 | * |
| 6 | * Copyright (C) 2006 Qumranet, Inc. |
Ben-Ami Yassour | 4d5c5d0 | 2008-07-28 19:26:26 +0300 | [diff] [blame] | 7 | * Copyright (C) 2008 Qumranet, Inc. |
| 8 | * Copyright IBM Corporation, 2008 |
Nicolas Kaiser | 9611c18 | 2010-10-06 14:23:22 +0200 | [diff] [blame] | 9 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 10 | * |
| 11 | * Authors: |
| 12 | * Avi Kivity <avi@qumranet.com> |
| 13 | * Yaniv Kamay <yaniv@qumranet.com> |
Ben-Ami Yassour | 4d5c5d0 | 2008-07-28 19:26:26 +0300 | [diff] [blame] | 14 | * Amit Shah <amit.shah@qumranet.com> |
| 15 | * Ben-Ami Yassour <benami@il.ibm.com> |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 16 | * |
| 17 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 18 | * the COPYING file in the top-level directory. |
| 19 | * |
| 20 | */ |
| 21 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 22 | #include <linux/kvm_host.h> |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 23 | #include "irq.h" |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 24 | #include "mmu.h" |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 25 | #include "i8254.h" |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 26 | #include "tss.h" |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 27 | #include "kvm_cache_regs.h" |
Avi Kivity | 26eef70 | 2008-07-03 14:59:22 +0300 | [diff] [blame] | 28 | #include "x86.h" |
Avi Kivity | 00b27a3 | 2011-11-23 16:30:32 +0200 | [diff] [blame] | 29 | #include "cpuid.h" |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 30 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 31 | #include <linux/clocksource.h> |
Ben-Ami Yassour | 4d5c5d0 | 2008-07-28 19:26:26 +0300 | [diff] [blame] | 32 | #include <linux/interrupt.h> |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 33 | #include <linux/kvm.h> |
| 34 | #include <linux/fs.h> |
| 35 | #include <linux/vmalloc.h> |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 36 | #include <linux/module.h> |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 37 | #include <linux/mman.h> |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 38 | #include <linux/highmem.h> |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 39 | #include <linux/iommu.h> |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 40 | #include <linux/intel-iommu.h> |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 41 | #include <linux/cpufreq.h> |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 42 | #include <linux/user-return-notifier.h> |
Marcelo Tosatti | a983fb2 | 2009-12-23 14:35:23 -0200 | [diff] [blame] | 43 | #include <linux/srcu.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 44 | #include <linux/slab.h> |
Zhang, Yanmin | ff9d07a | 2010-04-19 13:32:45 +0800 | [diff] [blame] | 45 | #include <linux/perf_event.h> |
Lai Jiangshan | 7bee342 | 2010-06-02 17:06:03 +0800 | [diff] [blame] | 46 | #include <linux/uaccess.h> |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 47 | #include <linux/hash.h> |
Joerg Roedel | a1b60c1 | 2011-09-06 18:46:34 +0200 | [diff] [blame] | 48 | #include <linux/pci.h> |
Marcelo Tosatti | 16e8d74 | 2012-11-27 23:29:00 -0200 | [diff] [blame] | 49 | #include <linux/timekeeper_internal.h> |
| 50 | #include <linux/pvclock_gtod.h> |
Avi Kivity | aec51dc | 2009-07-01 16:01:02 +0300 | [diff] [blame] | 51 | #include <trace/events/kvm.h> |
Xiao Guangrong | 2ed152a | 2010-03-10 19:00:43 +0800 | [diff] [blame] | 52 | |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 53 | #define CREATE_TRACE_POINTS |
| 54 | #include "trace.h" |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 55 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 56 | #include <asm/debugreg.h> |
Zhang Xiantao | d825ed0 | 2007-11-14 20:08:51 +0800 | [diff] [blame] | 57 | #include <asm/msr.h> |
Avi Kivity | a5f6130 | 2008-02-20 17:57:21 +0200 | [diff] [blame] | 58 | #include <asm/desc.h> |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 59 | #include <asm/mtrr.h> |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 60 | #include <asm/mce.h> |
Sheng Yang | 7cf3085 | 2010-05-17 17:08:27 +0800 | [diff] [blame] | 61 | #include <asm/i387.h> |
Linus Torvalds | 1361b83 | 2012-02-21 13:19:22 -0800 | [diff] [blame] | 62 | #include <asm/fpu-internal.h> /* Ugh! */ |
Sheng Yang | 9891883 | 2010-05-17 17:08:28 +0800 | [diff] [blame] | 63 | #include <asm/xcr.h> |
Zachary Amsden | 1d5f066 | 2010-08-19 22:07:30 -1000 | [diff] [blame] | 64 | #include <asm/pvclock.h> |
Avi Kivity | 217fc9c | 2010-08-26 13:38:03 +0300 | [diff] [blame] | 65 | #include <asm/div64.h> |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 66 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 67 | #define MAX_IO_MSRS 256 |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 68 | #define KVM_MAX_MCE_BANKS 32 |
Huang Ying | 5854dbc | 2010-10-08 16:24:14 +0800 | [diff] [blame] | 69 | #define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P) |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 70 | |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 71 | #define emul_to_vcpu(ctxt) \ |
| 72 | container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt) |
| 73 | |
Joerg Roedel | 50a37eb | 2008-01-31 14:57:38 +0100 | [diff] [blame] | 74 | /* EFER defaults: |
| 75 | * - enable syscall per default because its emulated by KVM |
| 76 | * - enable LME and LMA per default on 64 bit KVM |
| 77 | */ |
| 78 | #ifdef CONFIG_X86_64 |
Lai Jiangshan | 1260edbe | 2011-02-21 11:51:35 +0800 | [diff] [blame] | 79 | static |
| 80 | u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); |
Joerg Roedel | 50a37eb | 2008-01-31 14:57:38 +0100 | [diff] [blame] | 81 | #else |
Lai Jiangshan | 1260edbe | 2011-02-21 11:51:35 +0800 | [diff] [blame] | 82 | static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); |
Joerg Roedel | 50a37eb | 2008-01-31 14:57:38 +0100 | [diff] [blame] | 83 | #endif |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 84 | |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 85 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
| 86 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
Hollis Blanchard | 417bc30 | 2007-10-31 17:24:23 -0500 | [diff] [blame] | 87 | |
Gleb Natapov | cb142eb | 2009-08-09 15:17:40 +0300 | [diff] [blame] | 88 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 89 | static void process_nmi(struct kvm_vcpu *vcpu); |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 90 | |
Zhang Xiantao | 97896d0 | 2007-11-14 20:09:30 +0800 | [diff] [blame] | 91 | struct kvm_x86_ops *kvm_x86_ops; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 92 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
Zhang Xiantao | 97896d0 | 2007-11-14 20:09:30 +0800 | [diff] [blame] | 93 | |
Rusty Russell | 476bc00 | 2012-01-13 09:32:18 +1030 | [diff] [blame] | 94 | static bool ignore_msrs = 0; |
| 95 | module_param(ignore_msrs, bool, S_IRUGO | S_IWUSR); |
Andre Przywara | ed85c06 | 2009-06-25 12:36:49 +0200 | [diff] [blame] | 96 | |
Joerg Roedel | 92a1f12 | 2011-03-25 09:44:51 +0100 | [diff] [blame] | 97 | bool kvm_has_tsc_control; |
| 98 | EXPORT_SYMBOL_GPL(kvm_has_tsc_control); |
| 99 | u32 kvm_max_guest_tsc_khz; |
| 100 | EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz); |
| 101 | |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 102 | /* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */ |
| 103 | static u32 tsc_tolerance_ppm = 250; |
| 104 | module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR); |
| 105 | |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 106 | #define KVM_NR_SHARED_MSRS 16 |
| 107 | |
| 108 | struct kvm_shared_msrs_global { |
| 109 | int nr; |
Sheng Yang | 2bf78fa | 2009-12-18 16:48:44 +0800 | [diff] [blame] | 110 | u32 msrs[KVM_NR_SHARED_MSRS]; |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 111 | }; |
| 112 | |
| 113 | struct kvm_shared_msrs { |
| 114 | struct user_return_notifier urn; |
| 115 | bool registered; |
Sheng Yang | 2bf78fa | 2009-12-18 16:48:44 +0800 | [diff] [blame] | 116 | struct kvm_shared_msr_values { |
| 117 | u64 host; |
| 118 | u64 curr; |
| 119 | } values[KVM_NR_SHARED_MSRS]; |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 120 | }; |
| 121 | |
| 122 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; |
Marcelo Tosatti | 013f6a5 | 2013-01-03 11:41:39 -0200 | [diff] [blame] | 123 | static struct kvm_shared_msrs __percpu *shared_msrs; |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 124 | |
Hollis Blanchard | 417bc30 | 2007-10-31 17:24:23 -0500 | [diff] [blame] | 125 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 126 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
| 127 | { "pf_guest", VCPU_STAT(pf_guest) }, |
| 128 | { "tlb_flush", VCPU_STAT(tlb_flush) }, |
| 129 | { "invlpg", VCPU_STAT(invlpg) }, |
| 130 | { "exits", VCPU_STAT(exits) }, |
| 131 | { "io_exits", VCPU_STAT(io_exits) }, |
| 132 | { "mmio_exits", VCPU_STAT(mmio_exits) }, |
| 133 | { "signal_exits", VCPU_STAT(signal_exits) }, |
| 134 | { "irq_window", VCPU_STAT(irq_window_exits) }, |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 135 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 136 | { "halt_exits", VCPU_STAT(halt_exits) }, |
| 137 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
Amit Shah | f11c3a8 | 2008-02-21 01:00:30 +0530 | [diff] [blame] | 138 | { "hypercalls", VCPU_STAT(hypercalls) }, |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 139 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
| 140 | { "irq_exits", VCPU_STAT(irq_exits) }, |
| 141 | { "host_state_reload", VCPU_STAT(host_state_reload) }, |
| 142 | { "efer_reload", VCPU_STAT(efer_reload) }, |
| 143 | { "fpu_reload", VCPU_STAT(fpu_reload) }, |
| 144 | { "insn_emulation", VCPU_STAT(insn_emulation) }, |
| 145 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, |
Avi Kivity | fa89a81 | 2008-09-01 15:57:51 +0300 | [diff] [blame] | 146 | { "irq_injections", VCPU_STAT(irq_injections) }, |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 147 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
Avi Kivity | 4cee576 | 2007-11-18 16:37:07 +0200 | [diff] [blame] | 148 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
| 149 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, |
| 150 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, |
| 151 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, |
| 152 | { "mmu_flooded", VM_STAT(mmu_flooded) }, |
| 153 | { "mmu_recycled", VM_STAT(mmu_recycled) }, |
Avi Kivity | dfc5aa0 | 2007-12-18 19:47:18 +0200 | [diff] [blame] | 154 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
Marcelo Tosatti | 4731d4c | 2008-09-23 13:18:39 -0300 | [diff] [blame] | 155 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
Avi Kivity | 0f74a24 | 2007-11-20 23:01:14 +0200 | [diff] [blame] | 156 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
Marcelo Tosatti | 05da455 | 2008-02-23 11:44:30 -0300 | [diff] [blame] | 157 | { "largepages", VM_STAT(lpages) }, |
Hollis Blanchard | 417bc30 | 2007-10-31 17:24:23 -0500 | [diff] [blame] | 158 | { NULL } |
| 159 | }; |
| 160 | |
Dexuan Cui | 2acf923 | 2010-06-10 11:27:12 +0800 | [diff] [blame] | 161 | u64 __read_mostly host_xcr0; |
| 162 | |
Jan Kiszka | b6785de | 2012-09-20 07:43:17 +0200 | [diff] [blame] | 163 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); |
Avi Kivity | d6aa100 | 2011-04-20 15:47:13 +0300 | [diff] [blame] | 164 | |
Jan Kiszka | 57f252f | 2013-03-12 10:20:24 +0100 | [diff] [blame^] | 165 | static void kvm_vcpu_reset(struct kvm_vcpu *vcpu); |
Dexuan Cui | 2acf923 | 2010-06-10 11:27:12 +0800 | [diff] [blame] | 166 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 167 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
| 168 | { |
| 169 | int i; |
| 170 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) |
| 171 | vcpu->arch.apf.gfns[i] = ~0; |
| 172 | } |
| 173 | |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 174 | static void kvm_on_user_return(struct user_return_notifier *urn) |
| 175 | { |
| 176 | unsigned slot; |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 177 | struct kvm_shared_msrs *locals |
| 178 | = container_of(urn, struct kvm_shared_msrs, urn); |
Sheng Yang | 2bf78fa | 2009-12-18 16:48:44 +0800 | [diff] [blame] | 179 | struct kvm_shared_msr_values *values; |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 180 | |
| 181 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { |
Sheng Yang | 2bf78fa | 2009-12-18 16:48:44 +0800 | [diff] [blame] | 182 | values = &locals->values[slot]; |
| 183 | if (values->host != values->curr) { |
| 184 | wrmsrl(shared_msrs_global.msrs[slot], values->host); |
| 185 | values->curr = values->host; |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 186 | } |
| 187 | } |
| 188 | locals->registered = false; |
| 189 | user_return_notifier_unregister(urn); |
| 190 | } |
| 191 | |
Sheng Yang | 2bf78fa | 2009-12-18 16:48:44 +0800 | [diff] [blame] | 192 | static void shared_msr_update(unsigned slot, u32 msr) |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 193 | { |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 194 | u64 value; |
Marcelo Tosatti | 013f6a5 | 2013-01-03 11:41:39 -0200 | [diff] [blame] | 195 | unsigned int cpu = smp_processor_id(); |
| 196 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 197 | |
Sheng Yang | 2bf78fa | 2009-12-18 16:48:44 +0800 | [diff] [blame] | 198 | /* only read, and nobody should modify it at this time, |
| 199 | * so don't need lock */ |
| 200 | if (slot >= shared_msrs_global.nr) { |
| 201 | printk(KERN_ERR "kvm: invalid MSR slot!"); |
| 202 | return; |
| 203 | } |
| 204 | rdmsrl_safe(msr, &value); |
| 205 | smsr->values[slot].host = value; |
| 206 | smsr->values[slot].curr = value; |
| 207 | } |
| 208 | |
| 209 | void kvm_define_shared_msr(unsigned slot, u32 msr) |
| 210 | { |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 211 | if (slot >= shared_msrs_global.nr) |
| 212 | shared_msrs_global.nr = slot + 1; |
Sheng Yang | 2bf78fa | 2009-12-18 16:48:44 +0800 | [diff] [blame] | 213 | shared_msrs_global.msrs[slot] = msr; |
| 214 | /* we need ensured the shared_msr_global have been updated */ |
| 215 | smp_wmb(); |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 216 | } |
| 217 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); |
| 218 | |
| 219 | static void kvm_shared_msr_cpu_online(void) |
| 220 | { |
| 221 | unsigned i; |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 222 | |
| 223 | for (i = 0; i < shared_msrs_global.nr; ++i) |
Sheng Yang | 2bf78fa | 2009-12-18 16:48:44 +0800 | [diff] [blame] | 224 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 225 | } |
| 226 | |
Avi Kivity | d569672 | 2009-12-02 12:28:47 +0200 | [diff] [blame] | 227 | void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 228 | { |
Marcelo Tosatti | 013f6a5 | 2013-01-03 11:41:39 -0200 | [diff] [blame] | 229 | unsigned int cpu = smp_processor_id(); |
| 230 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 231 | |
Sheng Yang | 2bf78fa | 2009-12-18 16:48:44 +0800 | [diff] [blame] | 232 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 233 | return; |
Sheng Yang | 2bf78fa | 2009-12-18 16:48:44 +0800 | [diff] [blame] | 234 | smsr->values[slot].curr = value; |
| 235 | wrmsrl(shared_msrs_global.msrs[slot], value); |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 236 | if (!smsr->registered) { |
| 237 | smsr->urn.on_user_return = kvm_on_user_return; |
| 238 | user_return_notifier_register(&smsr->urn); |
| 239 | smsr->registered = true; |
| 240 | } |
| 241 | } |
| 242 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); |
| 243 | |
Avi Kivity | 3548bab | 2009-11-28 14:18:47 +0200 | [diff] [blame] | 244 | static void drop_user_return_notifiers(void *ignore) |
| 245 | { |
Marcelo Tosatti | 013f6a5 | 2013-01-03 11:41:39 -0200 | [diff] [blame] | 246 | unsigned int cpu = smp_processor_id(); |
| 247 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); |
Avi Kivity | 3548bab | 2009-11-28 14:18:47 +0200 | [diff] [blame] | 248 | |
| 249 | if (smsr->registered) |
| 250 | kvm_on_user_return(&smsr->urn); |
| 251 | } |
| 252 | |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame] | 253 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
| 254 | { |
Gleb Natapov | 8a5a87d | 2012-08-05 15:58:26 +0300 | [diff] [blame] | 255 | return vcpu->arch.apic_base; |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame] | 256 | } |
| 257 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); |
| 258 | |
| 259 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) |
| 260 | { |
| 261 | /* TODO: reserve bits check */ |
Gleb Natapov | 8a5a87d | 2012-08-05 15:58:26 +0300 | [diff] [blame] | 262 | kvm_lapic_set_base(vcpu, data); |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame] | 263 | } |
| 264 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); |
| 265 | |
Eddie Dong | 3fd28fc | 2009-11-19 17:54:07 +0200 | [diff] [blame] | 266 | #define EXCPT_BENIGN 0 |
| 267 | #define EXCPT_CONTRIBUTORY 1 |
| 268 | #define EXCPT_PF 2 |
| 269 | |
| 270 | static int exception_class(int vector) |
| 271 | { |
| 272 | switch (vector) { |
| 273 | case PF_VECTOR: |
| 274 | return EXCPT_PF; |
| 275 | case DE_VECTOR: |
| 276 | case TS_VECTOR: |
| 277 | case NP_VECTOR: |
| 278 | case SS_VECTOR: |
| 279 | case GP_VECTOR: |
| 280 | return EXCPT_CONTRIBUTORY; |
| 281 | default: |
| 282 | break; |
| 283 | } |
| 284 | return EXCPT_BENIGN; |
| 285 | } |
| 286 | |
| 287 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, |
Joerg Roedel | ce7ddec | 2010-04-22 12:33:13 +0200 | [diff] [blame] | 288 | unsigned nr, bool has_error, u32 error_code, |
| 289 | bool reinject) |
Eddie Dong | 3fd28fc | 2009-11-19 17:54:07 +0200 | [diff] [blame] | 290 | { |
| 291 | u32 prev_nr; |
| 292 | int class1, class2; |
| 293 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 294 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
| 295 | |
Eddie Dong | 3fd28fc | 2009-11-19 17:54:07 +0200 | [diff] [blame] | 296 | if (!vcpu->arch.exception.pending) { |
| 297 | queue: |
| 298 | vcpu->arch.exception.pending = true; |
| 299 | vcpu->arch.exception.has_error_code = has_error; |
| 300 | vcpu->arch.exception.nr = nr; |
| 301 | vcpu->arch.exception.error_code = error_code; |
Joerg Roedel | 3f0fd29 | 2010-05-05 16:04:41 +0200 | [diff] [blame] | 302 | vcpu->arch.exception.reinject = reinject; |
Eddie Dong | 3fd28fc | 2009-11-19 17:54:07 +0200 | [diff] [blame] | 303 | return; |
| 304 | } |
| 305 | |
| 306 | /* to check exception */ |
| 307 | prev_nr = vcpu->arch.exception.nr; |
| 308 | if (prev_nr == DF_VECTOR) { |
| 309 | /* triple fault -> shutdown */ |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 310 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
Eddie Dong | 3fd28fc | 2009-11-19 17:54:07 +0200 | [diff] [blame] | 311 | return; |
| 312 | } |
| 313 | class1 = exception_class(prev_nr); |
| 314 | class2 = exception_class(nr); |
| 315 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) |
| 316 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { |
| 317 | /* generate double fault per SDM Table 5-5 */ |
| 318 | vcpu->arch.exception.pending = true; |
| 319 | vcpu->arch.exception.has_error_code = true; |
| 320 | vcpu->arch.exception.nr = DF_VECTOR; |
| 321 | vcpu->arch.exception.error_code = 0; |
| 322 | } else |
| 323 | /* replace previous exception with a new one in a hope |
| 324 | that instruction re-execution will regenerate lost |
| 325 | exception */ |
| 326 | goto queue; |
| 327 | } |
| 328 | |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 329 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
| 330 | { |
Joerg Roedel | ce7ddec | 2010-04-22 12:33:13 +0200 | [diff] [blame] | 331 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 332 | } |
| 333 | EXPORT_SYMBOL_GPL(kvm_queue_exception); |
| 334 | |
Joerg Roedel | ce7ddec | 2010-04-22 12:33:13 +0200 | [diff] [blame] | 335 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
| 336 | { |
| 337 | kvm_multiple_exception(vcpu, nr, false, 0, true); |
| 338 | } |
| 339 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); |
| 340 | |
Andre Przywara | db8fcef | 2010-12-21 11:12:01 +0100 | [diff] [blame] | 341 | void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 342 | { |
Andre Przywara | db8fcef | 2010-12-21 11:12:01 +0100 | [diff] [blame] | 343 | if (err) |
| 344 | kvm_inject_gp(vcpu, 0); |
| 345 | else |
| 346 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
| 347 | } |
| 348 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); |
Joerg Roedel | 8df25a3 | 2010-09-10 17:30:46 +0200 | [diff] [blame] | 349 | |
Avi Kivity | 6389ee9 | 2010-11-29 16:12:30 +0200 | [diff] [blame] | 350 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 351 | { |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 352 | ++vcpu->stat.pf_guest; |
Avi Kivity | 6389ee9 | 2010-11-29 16:12:30 +0200 | [diff] [blame] | 353 | vcpu->arch.cr2 = fault->address; |
| 354 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 355 | } |
Nadav Har'El | 27d6c86 | 2011-05-25 23:06:59 +0300 | [diff] [blame] | 356 | EXPORT_SYMBOL_GPL(kvm_inject_page_fault); |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 357 | |
Avi Kivity | 6389ee9 | 2010-11-29 16:12:30 +0200 | [diff] [blame] | 358 | void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
Joerg Roedel | d4f8cf6 | 2010-09-10 17:30:55 +0200 | [diff] [blame] | 359 | { |
Avi Kivity | 6389ee9 | 2010-11-29 16:12:30 +0200 | [diff] [blame] | 360 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
| 361 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); |
Joerg Roedel | d4f8cf6 | 2010-09-10 17:30:55 +0200 | [diff] [blame] | 362 | else |
Avi Kivity | 6389ee9 | 2010-11-29 16:12:30 +0200 | [diff] [blame] | 363 | vcpu->arch.mmu.inject_page_fault(vcpu, fault); |
Joerg Roedel | d4f8cf6 | 2010-09-10 17:30:55 +0200 | [diff] [blame] | 364 | } |
| 365 | |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 366 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
| 367 | { |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 368 | atomic_inc(&vcpu->arch.nmi_queued); |
| 369 | kvm_make_request(KVM_REQ_NMI, vcpu); |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 370 | } |
| 371 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); |
| 372 | |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 373 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
| 374 | { |
Joerg Roedel | ce7ddec | 2010-04-22 12:33:13 +0200 | [diff] [blame] | 375 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 376 | } |
| 377 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); |
| 378 | |
Joerg Roedel | ce7ddec | 2010-04-22 12:33:13 +0200 | [diff] [blame] | 379 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
| 380 | { |
| 381 | kvm_multiple_exception(vcpu, nr, true, error_code, true); |
| 382 | } |
| 383 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); |
| 384 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 385 | /* |
Avi Kivity | 0a79b00 | 2009-09-01 12:03:25 +0300 | [diff] [blame] | 386 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue |
| 387 | * a #GP and return false. |
| 388 | */ |
| 389 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 390 | { |
Avi Kivity | 0a79b00 | 2009-09-01 12:03:25 +0300 | [diff] [blame] | 391 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
| 392 | return true; |
| 393 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); |
| 394 | return false; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 395 | } |
Avi Kivity | 0a79b00 | 2009-09-01 12:03:25 +0300 | [diff] [blame] | 396 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 397 | |
| 398 | /* |
Joerg Roedel | ec92fe4 | 2010-09-10 17:30:51 +0200 | [diff] [blame] | 399 | * This function will be used to read from the physical memory of the currently |
| 400 | * running guest. The difference to kvm_read_guest_page is that this function |
| 401 | * can read from guest physical or from the guest's guest physical memory. |
| 402 | */ |
| 403 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, |
| 404 | gfn_t ngfn, void *data, int offset, int len, |
| 405 | u32 access) |
| 406 | { |
| 407 | gfn_t real_gfn; |
| 408 | gpa_t ngpa; |
| 409 | |
| 410 | ngpa = gfn_to_gpa(ngfn); |
| 411 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access); |
| 412 | if (real_gfn == UNMAPPED_GVA) |
| 413 | return -EFAULT; |
| 414 | |
| 415 | real_gfn = gpa_to_gfn(real_gfn); |
| 416 | |
| 417 | return kvm_read_guest_page(vcpu->kvm, real_gfn, data, offset, len); |
| 418 | } |
| 419 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); |
| 420 | |
Joerg Roedel | 3d06b8b | 2010-09-10 17:30:53 +0200 | [diff] [blame] | 421 | int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
| 422 | void *data, int offset, int len, u32 access) |
| 423 | { |
| 424 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, |
| 425 | data, offset, len, access); |
| 426 | } |
| 427 | |
Joerg Roedel | ec92fe4 | 2010-09-10 17:30:51 +0200 | [diff] [blame] | 428 | /* |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 429 | * Load the pae pdptrs. Return true is they are all valid. |
| 430 | */ |
Joerg Roedel | ff03a07 | 2010-09-10 17:30:57 +0200 | [diff] [blame] | 431 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 432 | { |
| 433 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; |
| 434 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; |
| 435 | int i; |
| 436 | int ret; |
Joerg Roedel | ff03a07 | 2010-09-10 17:30:57 +0200 | [diff] [blame] | 437 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 438 | |
Joerg Roedel | ff03a07 | 2010-09-10 17:30:57 +0200 | [diff] [blame] | 439 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
| 440 | offset * sizeof(u64), sizeof(pdpte), |
| 441 | PFERR_USER_MASK|PFERR_WRITE_MASK); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 442 | if (ret < 0) { |
| 443 | ret = 0; |
| 444 | goto out; |
| 445 | } |
| 446 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { |
Avi Kivity | 43a3795 | 2009-06-10 14:12:05 +0300 | [diff] [blame] | 447 | if (is_present_gpte(pdpte[i]) && |
Dong, Eddie | 20c466b | 2009-03-31 23:03:45 +0800 | [diff] [blame] | 448 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 449 | ret = 0; |
| 450 | goto out; |
| 451 | } |
| 452 | } |
| 453 | ret = 1; |
| 454 | |
Joerg Roedel | ff03a07 | 2010-09-10 17:30:57 +0200 | [diff] [blame] | 455 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
Avi Kivity | 6de4f3a | 2009-05-31 22:58:47 +0300 | [diff] [blame] | 456 | __set_bit(VCPU_EXREG_PDPTR, |
| 457 | (unsigned long *)&vcpu->arch.regs_avail); |
| 458 | __set_bit(VCPU_EXREG_PDPTR, |
| 459 | (unsigned long *)&vcpu->arch.regs_dirty); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 460 | out: |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 461 | |
| 462 | return ret; |
| 463 | } |
Joerg Roedel | cc4b687 | 2008-02-07 13:47:43 +0100 | [diff] [blame] | 464 | EXPORT_SYMBOL_GPL(load_pdptrs); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 465 | |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 466 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
| 467 | { |
Joerg Roedel | ff03a07 | 2010-09-10 17:30:57 +0200 | [diff] [blame] | 468 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 469 | bool changed = true; |
Joerg Roedel | 3d06b8b | 2010-09-10 17:30:53 +0200 | [diff] [blame] | 470 | int offset; |
| 471 | gfn_t gfn; |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 472 | int r; |
| 473 | |
| 474 | if (is_long_mode(vcpu) || !is_pae(vcpu)) |
| 475 | return false; |
| 476 | |
Avi Kivity | 6de4f3a | 2009-05-31 22:58:47 +0300 | [diff] [blame] | 477 | if (!test_bit(VCPU_EXREG_PDPTR, |
| 478 | (unsigned long *)&vcpu->arch.regs_avail)) |
| 479 | return true; |
| 480 | |
Avi Kivity | 9f8fe50 | 2010-12-05 17:30:00 +0200 | [diff] [blame] | 481 | gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT; |
| 482 | offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1); |
Joerg Roedel | 3d06b8b | 2010-09-10 17:30:53 +0200 | [diff] [blame] | 483 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
| 484 | PFERR_USER_MASK | PFERR_WRITE_MASK); |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 485 | if (r < 0) |
| 486 | goto out; |
Joerg Roedel | ff03a07 | 2010-09-10 17:30:57 +0200 | [diff] [blame] | 487 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 488 | out: |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 489 | |
| 490 | return changed; |
| 491 | } |
| 492 | |
Avi Kivity | 49a9b07 | 2010-06-10 17:02:14 +0300 | [diff] [blame] | 493 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 494 | { |
Sheng Yang | aad8270 | 2010-05-12 16:40:42 +0800 | [diff] [blame] | 495 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
| 496 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP | |
| 497 | X86_CR0_CD | X86_CR0_NW; |
| 498 | |
Avi Kivity | f9a48e6 | 2010-01-06 19:10:22 +0200 | [diff] [blame] | 499 | cr0 |= X86_CR0_ET; |
| 500 | |
Gleb Natapov | ab34482 | 2010-01-21 15:28:46 +0200 | [diff] [blame] | 501 | #ifdef CONFIG_X86_64 |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 502 | if (cr0 & 0xffffffff00000000UL) |
| 503 | return 1; |
Gleb Natapov | ab34482 | 2010-01-21 15:28:46 +0200 | [diff] [blame] | 504 | #endif |
| 505 | |
| 506 | cr0 &= ~CR0_RESERVED_BITS; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 507 | |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 508 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
| 509 | return 1; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 510 | |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 511 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
| 512 | return 1; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 513 | |
| 514 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { |
| 515 | #ifdef CONFIG_X86_64 |
Avi Kivity | f6801df | 2010-01-21 15:31:50 +0200 | [diff] [blame] | 516 | if ((vcpu->arch.efer & EFER_LME)) { |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 517 | int cs_db, cs_l; |
| 518 | |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 519 | if (!is_pae(vcpu)) |
| 520 | return 1; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 521 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 522 | if (cs_l) |
| 523 | return 1; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 524 | } else |
| 525 | #endif |
Joerg Roedel | ff03a07 | 2010-09-10 17:30:57 +0200 | [diff] [blame] | 526 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
Avi Kivity | 9f8fe50 | 2010-12-05 17:30:00 +0200 | [diff] [blame] | 527 | kvm_read_cr3(vcpu))) |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 528 | return 1; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 529 | } |
| 530 | |
Mao, Junjie | ad756a1 | 2012-07-02 01:18:48 +0000 | [diff] [blame] | 531 | if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) |
| 532 | return 1; |
| 533 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 534 | kvm_x86_ops->set_cr0(vcpu, cr0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 535 | |
Lai Jiangshan | d170c41 | 2011-02-21 11:21:30 +0800 | [diff] [blame] | 536 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
Xiao Guangrong | e5f3f02 | 2010-11-12 14:47:01 +0800 | [diff] [blame] | 537 | kvm_clear_async_pf_completion_queue(vcpu); |
Lai Jiangshan | d170c41 | 2011-02-21 11:21:30 +0800 | [diff] [blame] | 538 | kvm_async_pf_hash_reset(vcpu); |
| 539 | } |
Xiao Guangrong | e5f3f02 | 2010-11-12 14:47:01 +0800 | [diff] [blame] | 540 | |
Sheng Yang | aad8270 | 2010-05-12 16:40:42 +0800 | [diff] [blame] | 541 | if ((cr0 ^ old_cr0) & update_bits) |
| 542 | kvm_mmu_reset_context(vcpu); |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 543 | return 0; |
| 544 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 545 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 546 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 547 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 548 | { |
Avi Kivity | 49a9b07 | 2010-06-10 17:02:14 +0300 | [diff] [blame] | 549 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 550 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 551 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 552 | |
Dexuan Cui | 2acf923 | 2010-06-10 11:27:12 +0800 | [diff] [blame] | 553 | int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
| 554 | { |
| 555 | u64 xcr0; |
| 556 | |
| 557 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ |
| 558 | if (index != XCR_XFEATURE_ENABLED_MASK) |
| 559 | return 1; |
| 560 | xcr0 = xcr; |
| 561 | if (kvm_x86_ops->get_cpl(vcpu) != 0) |
| 562 | return 1; |
| 563 | if (!(xcr0 & XSTATE_FP)) |
| 564 | return 1; |
| 565 | if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE)) |
| 566 | return 1; |
| 567 | if (xcr0 & ~host_xcr0) |
| 568 | return 1; |
| 569 | vcpu->arch.xcr0 = xcr0; |
| 570 | vcpu->guest_xcr0_loaded = 0; |
| 571 | return 0; |
| 572 | } |
| 573 | |
| 574 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
| 575 | { |
| 576 | if (__kvm_set_xcr(vcpu, index, xcr)) { |
| 577 | kvm_inject_gp(vcpu, 0); |
| 578 | return 1; |
| 579 | } |
| 580 | return 0; |
| 581 | } |
| 582 | EXPORT_SYMBOL_GPL(kvm_set_xcr); |
| 583 | |
Avi Kivity | a83b29c | 2010-06-10 17:02:15 +0300 | [diff] [blame] | 584 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 585 | { |
Avi Kivity | fc78f51 | 2009-12-07 12:16:48 +0200 | [diff] [blame] | 586 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
Yang, Wei Y | c68b734 | 2011-06-03 11:13:42 +0800 | [diff] [blame] | 587 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | |
| 588 | X86_CR4_PAE | X86_CR4_SMEP; |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 589 | if (cr4 & CR4_RESERVED_BITS) |
| 590 | return 1; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 591 | |
Dexuan Cui | 2acf923 | 2010-06-10 11:27:12 +0800 | [diff] [blame] | 592 | if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE)) |
| 593 | return 1; |
| 594 | |
Yang, Wei Y | c68b734 | 2011-06-03 11:13:42 +0800 | [diff] [blame] | 595 | if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP)) |
| 596 | return 1; |
| 597 | |
Yang, Wei | 74dc2b4 | 2011-06-14 20:10:18 +0800 | [diff] [blame] | 598 | if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_RDWRGSFS)) |
| 599 | return 1; |
| 600 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 601 | if (is_long_mode(vcpu)) { |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 602 | if (!(cr4 & X86_CR4_PAE)) |
| 603 | return 1; |
Avi Kivity | a2edf57 | 2009-05-24 22:19:00 +0300 | [diff] [blame] | 604 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
| 605 | && ((cr4 ^ old_cr4) & pdptr_bits) |
Avi Kivity | 9f8fe50 | 2010-12-05 17:30:00 +0200 | [diff] [blame] | 606 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
| 607 | kvm_read_cr3(vcpu))) |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 608 | return 1; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 609 | |
Mao, Junjie | ad756a1 | 2012-07-02 01:18:48 +0000 | [diff] [blame] | 610 | if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) { |
| 611 | if (!guest_cpuid_has_pcid(vcpu)) |
| 612 | return 1; |
| 613 | |
| 614 | /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */ |
| 615 | if ((kvm_read_cr3(vcpu) & X86_CR3_PCID_MASK) || !is_long_mode(vcpu)) |
| 616 | return 1; |
| 617 | } |
| 618 | |
Nadav Har'El | 5e1746d | 2011-05-25 23:03:24 +0300 | [diff] [blame] | 619 | if (kvm_x86_ops->set_cr4(vcpu, cr4)) |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 620 | return 1; |
| 621 | |
Mao, Junjie | ad756a1 | 2012-07-02 01:18:48 +0000 | [diff] [blame] | 622 | if (((cr4 ^ old_cr4) & pdptr_bits) || |
| 623 | (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE))) |
Sheng Yang | aad8270 | 2010-05-12 16:40:42 +0800 | [diff] [blame] | 624 | kvm_mmu_reset_context(vcpu); |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 625 | |
Dexuan Cui | 2acf923 | 2010-06-10 11:27:12 +0800 | [diff] [blame] | 626 | if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE) |
Avi Kivity | 00b27a3 | 2011-11-23 16:30:32 +0200 | [diff] [blame] | 627 | kvm_update_cpuid(vcpu); |
Dexuan Cui | 2acf923 | 2010-06-10 11:27:12 +0800 | [diff] [blame] | 628 | |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 629 | return 0; |
| 630 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 631 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 632 | |
Avi Kivity | 2390218 | 2010-06-10 17:02:16 +0300 | [diff] [blame] | 633 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 634 | { |
Avi Kivity | 9f8fe50 | 2010-12-05 17:30:00 +0200 | [diff] [blame] | 635 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
Marcelo Tosatti | 0ba73cd | 2008-09-23 13:18:34 -0300 | [diff] [blame] | 636 | kvm_mmu_sync_roots(vcpu); |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 637 | kvm_mmu_flush_tlb(vcpu); |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 638 | return 0; |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 639 | } |
| 640 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 641 | if (is_long_mode(vcpu)) { |
Gleb Natapov | 471842e | 2012-10-15 09:49:08 +0200 | [diff] [blame] | 642 | if (kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) { |
Mao, Junjie | ad756a1 | 2012-07-02 01:18:48 +0000 | [diff] [blame] | 643 | if (cr3 & CR3_PCID_ENABLED_RESERVED_BITS) |
| 644 | return 1; |
| 645 | } else |
| 646 | if (cr3 & CR3_L_MODE_RESERVED_BITS) |
| 647 | return 1; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 648 | } else { |
| 649 | if (is_pae(vcpu)) { |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 650 | if (cr3 & CR3_PAE_RESERVED_BITS) |
| 651 | return 1; |
Joerg Roedel | ff03a07 | 2010-09-10 17:30:57 +0200 | [diff] [blame] | 652 | if (is_paging(vcpu) && |
| 653 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 654 | return 1; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 655 | } |
| 656 | /* |
| 657 | * We don't check reserved bits in nonpae mode, because |
| 658 | * this isn't enforced, and VMware depends on this. |
| 659 | */ |
| 660 | } |
| 661 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 662 | /* |
| 663 | * Does the new cr3 value map to physical memory? (Note, we |
| 664 | * catch an invalid cr3 even in real-mode, because it would |
| 665 | * cause trouble later on when we turn on paging anyway.) |
| 666 | * |
| 667 | * A real CPU would silently accept an invalid cr3 and would |
| 668 | * attempt to use it - with largely undefined (and often hard |
| 669 | * to debug) behavior on the guest side. |
| 670 | */ |
| 671 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 672 | return 1; |
| 673 | vcpu->arch.cr3 = cr3; |
Avi Kivity | aff48ba | 2010-12-05 18:56:11 +0200 | [diff] [blame] | 674 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 675 | vcpu->arch.mmu.new_cr3(vcpu); |
| 676 | return 0; |
| 677 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 678 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 679 | |
Andre Przywara | eea1cff | 2010-12-21 11:12:00 +0100 | [diff] [blame] | 680 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 681 | { |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 682 | if (cr8 & CR8_RESERVED_BITS) |
| 683 | return 1; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 684 | if (irqchip_in_kernel(vcpu->kvm)) |
| 685 | kvm_lapic_set_tpr(vcpu, cr8); |
| 686 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 687 | vcpu->arch.cr8 = cr8; |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 688 | return 0; |
| 689 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 690 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 691 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 692 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 693 | { |
| 694 | if (irqchip_in_kernel(vcpu->kvm)) |
| 695 | return kvm_lapic_get_cr8(vcpu); |
| 696 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 697 | return vcpu->arch.cr8; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 698 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 699 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 700 | |
Jan Kiszka | c863901 | 2012-09-21 05:42:55 +0200 | [diff] [blame] | 701 | static void kvm_update_dr7(struct kvm_vcpu *vcpu) |
| 702 | { |
| 703 | unsigned long dr7; |
| 704 | |
| 705 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
| 706 | dr7 = vcpu->arch.guest_debug_dr7; |
| 707 | else |
| 708 | dr7 = vcpu->arch.dr7; |
| 709 | kvm_x86_ops->set_dr7(vcpu, dr7); |
| 710 | vcpu->arch.switch_db_regs = (dr7 & DR7_BP_EN_MASK); |
| 711 | } |
| 712 | |
Gleb Natapov | 338dbc9 | 2010-04-28 19:15:32 +0300 | [diff] [blame] | 713 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 714 | { |
| 715 | switch (dr) { |
| 716 | case 0 ... 3: |
| 717 | vcpu->arch.db[dr] = val; |
| 718 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) |
| 719 | vcpu->arch.eff_db[dr] = val; |
| 720 | break; |
| 721 | case 4: |
Gleb Natapov | 338dbc9 | 2010-04-28 19:15:32 +0300 | [diff] [blame] | 722 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
| 723 | return 1; /* #UD */ |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 724 | /* fall through */ |
| 725 | case 6: |
Gleb Natapov | 338dbc9 | 2010-04-28 19:15:32 +0300 | [diff] [blame] | 726 | if (val & 0xffffffff00000000ULL) |
| 727 | return -1; /* #GP */ |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 728 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1; |
| 729 | break; |
| 730 | case 5: |
Gleb Natapov | 338dbc9 | 2010-04-28 19:15:32 +0300 | [diff] [blame] | 731 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
| 732 | return 1; /* #UD */ |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 733 | /* fall through */ |
| 734 | default: /* 7 */ |
Gleb Natapov | 338dbc9 | 2010-04-28 19:15:32 +0300 | [diff] [blame] | 735 | if (val & 0xffffffff00000000ULL) |
| 736 | return -1; /* #GP */ |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 737 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
Jan Kiszka | c863901 | 2012-09-21 05:42:55 +0200 | [diff] [blame] | 738 | kvm_update_dr7(vcpu); |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 739 | break; |
| 740 | } |
| 741 | |
| 742 | return 0; |
| 743 | } |
Gleb Natapov | 338dbc9 | 2010-04-28 19:15:32 +0300 | [diff] [blame] | 744 | |
| 745 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
| 746 | { |
| 747 | int res; |
| 748 | |
| 749 | res = __kvm_set_dr(vcpu, dr, val); |
| 750 | if (res > 0) |
| 751 | kvm_queue_exception(vcpu, UD_VECTOR); |
| 752 | else if (res < 0) |
| 753 | kvm_inject_gp(vcpu, 0); |
| 754 | |
| 755 | return res; |
| 756 | } |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 757 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
| 758 | |
Gleb Natapov | 338dbc9 | 2010-04-28 19:15:32 +0300 | [diff] [blame] | 759 | static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 760 | { |
| 761 | switch (dr) { |
| 762 | case 0 ... 3: |
| 763 | *val = vcpu->arch.db[dr]; |
| 764 | break; |
| 765 | case 4: |
Gleb Natapov | 338dbc9 | 2010-04-28 19:15:32 +0300 | [diff] [blame] | 766 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 767 | return 1; |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 768 | /* fall through */ |
| 769 | case 6: |
| 770 | *val = vcpu->arch.dr6; |
| 771 | break; |
| 772 | case 5: |
Gleb Natapov | 338dbc9 | 2010-04-28 19:15:32 +0300 | [diff] [blame] | 773 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 774 | return 1; |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 775 | /* fall through */ |
| 776 | default: /* 7 */ |
| 777 | *val = vcpu->arch.dr7; |
| 778 | break; |
| 779 | } |
| 780 | |
| 781 | return 0; |
| 782 | } |
Gleb Natapov | 338dbc9 | 2010-04-28 19:15:32 +0300 | [diff] [blame] | 783 | |
| 784 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
| 785 | { |
| 786 | if (_kvm_get_dr(vcpu, dr, val)) { |
| 787 | kvm_queue_exception(vcpu, UD_VECTOR); |
| 788 | return 1; |
| 789 | } |
| 790 | return 0; |
| 791 | } |
Gleb Natapov | 020df07 | 2010-04-13 10:05:23 +0300 | [diff] [blame] | 792 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
| 793 | |
Avi Kivity | 022cd0e | 2011-11-10 14:57:23 +0200 | [diff] [blame] | 794 | bool kvm_rdpmc(struct kvm_vcpu *vcpu) |
| 795 | { |
| 796 | u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 797 | u64 data; |
| 798 | int err; |
| 799 | |
| 800 | err = kvm_pmu_read_pmc(vcpu, ecx, &data); |
| 801 | if (err) |
| 802 | return err; |
| 803 | kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data); |
| 804 | kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32); |
| 805 | return err; |
| 806 | } |
| 807 | EXPORT_SYMBOL_GPL(kvm_rdpmc); |
| 808 | |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 809 | /* |
| 810 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS |
| 811 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. |
| 812 | * |
| 813 | * This list is modified at module load time to reflect the |
Glauber Costa | e3267cb | 2009-10-06 13:24:50 -0400 | [diff] [blame] | 814 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
| 815 | * kvm-specific. Those are put in the beginning of the list. |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 816 | */ |
Glauber Costa | e3267cb | 2009-10-06 13:24:50 -0400 | [diff] [blame] | 817 | |
Gleb Natapov | 439793d | 2012-08-01 17:01:42 +0300 | [diff] [blame] | 818 | #define KVM_SAVE_MSRS_BEGIN 10 |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 819 | static u32 msrs_to_save[] = { |
Glauber Costa | e3267cb | 2009-10-06 13:24:50 -0400 | [diff] [blame] | 820 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
Glauber Costa | 11c6bff | 2010-05-11 12:17:41 -0400 | [diff] [blame] | 821 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 822 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, |
Glauber Costa | c9aaa89 | 2011-07-11 15:28:14 -0400 | [diff] [blame] | 823 | HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 824 | MSR_KVM_PV_EOI_EN, |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 825 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
Brian Gerst | 8c06585 | 2010-07-17 09:03:26 -0400 | [diff] [blame] | 826 | MSR_STAR, |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 827 | #ifdef CONFIG_X86_64 |
| 828 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
| 829 | #endif |
Avi Kivity | e90aa41 | 2010-09-01 10:23:35 +0300 | [diff] [blame] | 830 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 831 | }; |
| 832 | |
| 833 | static unsigned num_msrs_to_save; |
| 834 | |
Mathias Krause | f1d2483 | 2012-08-30 01:30:18 +0200 | [diff] [blame] | 835 | static const u32 emulated_msrs[] = { |
Will Auld | ba90463 | 2012-11-29 12:42:50 -0800 | [diff] [blame] | 836 | MSR_IA32_TSC_ADJUST, |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 837 | MSR_IA32_TSCDEADLINE, |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 838 | MSR_IA32_MISC_ENABLE, |
Avi Kivity | 908e75f | 2010-07-07 14:09:38 +0300 | [diff] [blame] | 839 | MSR_IA32_MCG_STATUS, |
| 840 | MSR_IA32_MCG_CTL, |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 841 | }; |
| 842 | |
Roedel, Joerg | b69e8ca | 2010-05-06 11:38:43 +0200 | [diff] [blame] | 843 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 844 | { |
Sheng Yang | aad8270 | 2010-05-12 16:40:42 +0800 | [diff] [blame] | 845 | u64 old_efer = vcpu->arch.efer; |
| 846 | |
Roedel, Joerg | b69e8ca | 2010-05-06 11:38:43 +0200 | [diff] [blame] | 847 | if (efer & efer_reserved_bits) |
| 848 | return 1; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 849 | |
| 850 | if (is_paging(vcpu) |
Roedel, Joerg | b69e8ca | 2010-05-06 11:38:43 +0200 | [diff] [blame] | 851 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) |
| 852 | return 1; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 853 | |
Alexander Graf | 1b2fd70 | 2009-02-02 16:23:51 +0100 | [diff] [blame] | 854 | if (efer & EFER_FFXSR) { |
| 855 | struct kvm_cpuid_entry2 *feat; |
| 856 | |
| 857 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); |
Roedel, Joerg | b69e8ca | 2010-05-06 11:38:43 +0200 | [diff] [blame] | 858 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) |
| 859 | return 1; |
Alexander Graf | 1b2fd70 | 2009-02-02 16:23:51 +0100 | [diff] [blame] | 860 | } |
| 861 | |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 862 | if (efer & EFER_SVME) { |
| 863 | struct kvm_cpuid_entry2 *feat; |
| 864 | |
| 865 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); |
Roedel, Joerg | b69e8ca | 2010-05-06 11:38:43 +0200 | [diff] [blame] | 866 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) |
| 867 | return 1; |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 868 | } |
| 869 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 870 | efer &= ~EFER_LMA; |
Avi Kivity | f6801df | 2010-01-21 15:31:50 +0200 | [diff] [blame] | 871 | efer |= vcpu->arch.efer & EFER_LMA; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 872 | |
Sheng Yang | a3d204e | 2010-05-12 16:40:40 +0800 | [diff] [blame] | 873 | kvm_x86_ops->set_efer(vcpu, efer); |
| 874 | |
Sheng Yang | aad8270 | 2010-05-12 16:40:42 +0800 | [diff] [blame] | 875 | /* Update reserved bits */ |
| 876 | if ((efer ^ old_efer) & EFER_NX) |
| 877 | kvm_mmu_reset_context(vcpu); |
| 878 | |
Roedel, Joerg | b69e8ca | 2010-05-06 11:38:43 +0200 | [diff] [blame] | 879 | return 0; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 880 | } |
| 881 | |
Joerg Roedel | f2b4b7d | 2008-01-31 14:57:37 +0100 | [diff] [blame] | 882 | void kvm_enable_efer_bits(u64 mask) |
| 883 | { |
| 884 | efer_reserved_bits &= ~mask; |
| 885 | } |
| 886 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); |
| 887 | |
| 888 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 889 | /* |
| 890 | * Writes msr value into into the appropriate "register". |
| 891 | * Returns 0 on success, non-0 otherwise. |
| 892 | * Assumes vcpu_load() was already called. |
| 893 | */ |
Will Auld | 8fe8ab4 | 2012-11-29 12:42:12 -0800 | [diff] [blame] | 894 | int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 895 | { |
Will Auld | 8fe8ab4 | 2012-11-29 12:42:12 -0800 | [diff] [blame] | 896 | return kvm_x86_ops->set_msr(vcpu, msr); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 897 | } |
| 898 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 899 | /* |
| 900 | * Adapt set_msr() to msr_io()'s calling convention |
| 901 | */ |
| 902 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
| 903 | { |
Will Auld | 8fe8ab4 | 2012-11-29 12:42:12 -0800 | [diff] [blame] | 904 | struct msr_data msr; |
| 905 | |
| 906 | msr.data = *data; |
| 907 | msr.index = index; |
| 908 | msr.host_initiated = true; |
| 909 | return kvm_set_msr(vcpu, &msr); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 910 | } |
| 911 | |
Marcelo Tosatti | 16e8d74 | 2012-11-27 23:29:00 -0200 | [diff] [blame] | 912 | #ifdef CONFIG_X86_64 |
| 913 | struct pvclock_gtod_data { |
| 914 | seqcount_t seq; |
| 915 | |
| 916 | struct { /* extract of a clocksource struct */ |
| 917 | int vclock_mode; |
| 918 | cycle_t cycle_last; |
| 919 | cycle_t mask; |
| 920 | u32 mult; |
| 921 | u32 shift; |
| 922 | } clock; |
| 923 | |
| 924 | /* open coded 'struct timespec' */ |
| 925 | u64 monotonic_time_snsec; |
| 926 | time_t monotonic_time_sec; |
| 927 | }; |
| 928 | |
| 929 | static struct pvclock_gtod_data pvclock_gtod_data; |
| 930 | |
| 931 | static void update_pvclock_gtod(struct timekeeper *tk) |
| 932 | { |
| 933 | struct pvclock_gtod_data *vdata = &pvclock_gtod_data; |
| 934 | |
| 935 | write_seqcount_begin(&vdata->seq); |
| 936 | |
| 937 | /* copy pvclock gtod data */ |
| 938 | vdata->clock.vclock_mode = tk->clock->archdata.vclock_mode; |
| 939 | vdata->clock.cycle_last = tk->clock->cycle_last; |
| 940 | vdata->clock.mask = tk->clock->mask; |
| 941 | vdata->clock.mult = tk->mult; |
| 942 | vdata->clock.shift = tk->shift; |
| 943 | |
| 944 | vdata->monotonic_time_sec = tk->xtime_sec |
| 945 | + tk->wall_to_monotonic.tv_sec; |
| 946 | vdata->monotonic_time_snsec = tk->xtime_nsec |
| 947 | + (tk->wall_to_monotonic.tv_nsec |
| 948 | << tk->shift); |
| 949 | while (vdata->monotonic_time_snsec >= |
| 950 | (((u64)NSEC_PER_SEC) << tk->shift)) { |
| 951 | vdata->monotonic_time_snsec -= |
| 952 | ((u64)NSEC_PER_SEC) << tk->shift; |
| 953 | vdata->monotonic_time_sec++; |
| 954 | } |
| 955 | |
| 956 | write_seqcount_end(&vdata->seq); |
| 957 | } |
| 958 | #endif |
| 959 | |
| 960 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 961 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
| 962 | { |
Avi Kivity | 9ed3c44 | 2010-05-04 15:00:37 +0300 | [diff] [blame] | 963 | int version; |
| 964 | int r; |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 965 | struct pvclock_wall_clock wc; |
Jason Wang | 923de3c | 2010-01-27 19:13:49 +0800 | [diff] [blame] | 966 | struct timespec boot; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 967 | |
| 968 | if (!wall_clock) |
| 969 | return; |
| 970 | |
Avi Kivity | 9ed3c44 | 2010-05-04 15:00:37 +0300 | [diff] [blame] | 971 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
| 972 | if (r) |
| 973 | return; |
| 974 | |
| 975 | if (version & 1) |
| 976 | ++version; /* first time write, random junk */ |
| 977 | |
| 978 | ++version; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 979 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 980 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
| 981 | |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 982 | /* |
| 983 | * The guest calculates current wall clock time by adding |
Zachary Amsden | 34c238a | 2010-09-18 14:38:14 -1000 | [diff] [blame] | 984 | * system time (updated by kvm_guest_time_update below) to the |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 985 | * wall clock specified here. guest system time equals host |
| 986 | * system time for us, thus we must fill in host boot time here. |
| 987 | */ |
Jason Wang | 923de3c | 2010-01-27 19:13:49 +0800 | [diff] [blame] | 988 | getboottime(&boot); |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 989 | |
Bruce Rogers | 4b64866 | 2012-07-20 10:44:24 -0600 | [diff] [blame] | 990 | if (kvm->arch.kvmclock_offset) { |
| 991 | struct timespec ts = ns_to_timespec(kvm->arch.kvmclock_offset); |
| 992 | boot = timespec_sub(boot, ts); |
| 993 | } |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 994 | wc.sec = boot.tv_sec; |
| 995 | wc.nsec = boot.tv_nsec; |
| 996 | wc.version = version; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 997 | |
| 998 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); |
| 999 | |
| 1000 | version++; |
| 1001 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1002 | } |
| 1003 | |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 1004 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
| 1005 | { |
| 1006 | uint32_t quotient, remainder; |
| 1007 | |
| 1008 | /* Don't try to replace with do_div(), this one calculates |
| 1009 | * "(dividend << 32) / divisor" */ |
| 1010 | __asm__ ( "divl %4" |
| 1011 | : "=a" (quotient), "=d" (remainder) |
| 1012 | : "0" (0), "1" (dividend), "r" (divisor) ); |
| 1013 | return quotient; |
| 1014 | } |
| 1015 | |
Zachary Amsden | 5f4e3f8 | 2010-09-18 14:38:13 -1000 | [diff] [blame] | 1016 | static void kvm_get_time_scale(uint32_t scaled_khz, uint32_t base_khz, |
| 1017 | s8 *pshift, u32 *pmultiplier) |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 1018 | { |
Zachary Amsden | 5f4e3f8 | 2010-09-18 14:38:13 -1000 | [diff] [blame] | 1019 | uint64_t scaled64; |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 1020 | int32_t shift = 0; |
| 1021 | uint64_t tps64; |
| 1022 | uint32_t tps32; |
| 1023 | |
Zachary Amsden | 5f4e3f8 | 2010-09-18 14:38:13 -1000 | [diff] [blame] | 1024 | tps64 = base_khz * 1000LL; |
| 1025 | scaled64 = scaled_khz * 1000LL; |
Jan Kiszka | 5093362 | 2010-09-26 13:00:53 +0200 | [diff] [blame] | 1026 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 1027 | tps64 >>= 1; |
| 1028 | shift--; |
| 1029 | } |
| 1030 | |
| 1031 | tps32 = (uint32_t)tps64; |
Jan Kiszka | 5093362 | 2010-09-26 13:00:53 +0200 | [diff] [blame] | 1032 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
| 1033 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) |
Zachary Amsden | 5f4e3f8 | 2010-09-18 14:38:13 -1000 | [diff] [blame] | 1034 | scaled64 >>= 1; |
| 1035 | else |
| 1036 | tps32 <<= 1; |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 1037 | shift++; |
| 1038 | } |
| 1039 | |
Zachary Amsden | 5f4e3f8 | 2010-09-18 14:38:13 -1000 | [diff] [blame] | 1040 | *pshift = shift; |
| 1041 | *pmultiplier = div_frac(scaled64, tps32); |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 1042 | |
Zachary Amsden | 5f4e3f8 | 2010-09-18 14:38:13 -1000 | [diff] [blame] | 1043 | pr_debug("%s: base_khz %u => %u, shift %d, mul %u\n", |
| 1044 | __func__, base_khz, scaled_khz, shift, *pmultiplier); |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 1045 | } |
| 1046 | |
Zachary Amsden | 759379d | 2010-08-19 22:07:25 -1000 | [diff] [blame] | 1047 | static inline u64 get_kernel_ns(void) |
| 1048 | { |
| 1049 | struct timespec ts; |
| 1050 | |
| 1051 | WARN_ON(preemptible()); |
| 1052 | ktime_get_ts(&ts); |
| 1053 | monotonic_to_bootbased(&ts); |
| 1054 | return timespec_to_ns(&ts); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1055 | } |
| 1056 | |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1057 | #ifdef CONFIG_X86_64 |
Marcelo Tosatti | 16e8d74 | 2012-11-27 23:29:00 -0200 | [diff] [blame] | 1058 | static atomic_t kvm_guest_has_master_clock = ATOMIC_INIT(0); |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1059 | #endif |
Marcelo Tosatti | 16e8d74 | 2012-11-27 23:29:00 -0200 | [diff] [blame] | 1060 | |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 1061 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 1062 | unsigned long max_tsc_khz; |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 1063 | |
Joerg Roedel | 857e409 | 2011-03-25 09:44:50 +0100 | [diff] [blame] | 1064 | static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec) |
Zachary Amsden | 759379d | 2010-08-19 22:07:25 -1000 | [diff] [blame] | 1065 | { |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 1066 | return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult, |
| 1067 | vcpu->arch.virtual_tsc_shift); |
Zachary Amsden | 759379d | 2010-08-19 22:07:25 -1000 | [diff] [blame] | 1068 | } |
| 1069 | |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 1070 | static u32 adjust_tsc_khz(u32 khz, s32 ppm) |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 1071 | { |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 1072 | u64 v = (u64)khz * (1000000 + ppm); |
| 1073 | do_div(v, 1000000); |
| 1074 | return v; |
| 1075 | } |
| 1076 | |
| 1077 | static void kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 this_tsc_khz) |
| 1078 | { |
| 1079 | u32 thresh_lo, thresh_hi; |
| 1080 | int use_scaling = 0; |
| 1081 | |
Marcelo Tosatti | 03ba32c | 2013-03-11 23:10:24 -0300 | [diff] [blame] | 1082 | /* tsc_khz can be zero if TSC calibration fails */ |
| 1083 | if (this_tsc_khz == 0) |
| 1084 | return; |
| 1085 | |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 1086 | /* Compute a scale to convert nanoseconds in TSC cycles */ |
| 1087 | kvm_get_time_scale(this_tsc_khz, NSEC_PER_SEC / 1000, |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 1088 | &vcpu->arch.virtual_tsc_shift, |
| 1089 | &vcpu->arch.virtual_tsc_mult); |
| 1090 | vcpu->arch.virtual_tsc_khz = this_tsc_khz; |
| 1091 | |
| 1092 | /* |
| 1093 | * Compute the variation in TSC rate which is acceptable |
| 1094 | * within the range of tolerance and decide if the |
| 1095 | * rate being applied is within that bounds of the hardware |
| 1096 | * rate. If so, no scaling or compensation need be done. |
| 1097 | */ |
| 1098 | thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm); |
| 1099 | thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm); |
| 1100 | if (this_tsc_khz < thresh_lo || this_tsc_khz > thresh_hi) { |
| 1101 | pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", this_tsc_khz, thresh_lo, thresh_hi); |
| 1102 | use_scaling = 1; |
| 1103 | } |
| 1104 | kvm_x86_ops->set_tsc_khz(vcpu, this_tsc_khz, use_scaling); |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 1105 | } |
| 1106 | |
| 1107 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) |
| 1108 | { |
Zachary Amsden | e26101b | 2012-02-03 15:43:57 -0200 | [diff] [blame] | 1109 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec, |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 1110 | vcpu->arch.virtual_tsc_mult, |
| 1111 | vcpu->arch.virtual_tsc_shift); |
Zachary Amsden | e26101b | 2012-02-03 15:43:57 -0200 | [diff] [blame] | 1112 | tsc += vcpu->arch.this_tsc_write; |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 1113 | return tsc; |
| 1114 | } |
| 1115 | |
Marcelo Tosatti | b48aa97 | 2012-11-27 23:29:03 -0200 | [diff] [blame] | 1116 | void kvm_track_tsc_matching(struct kvm_vcpu *vcpu) |
| 1117 | { |
| 1118 | #ifdef CONFIG_X86_64 |
| 1119 | bool vcpus_matched; |
| 1120 | bool do_request = false; |
| 1121 | struct kvm_arch *ka = &vcpu->kvm->arch; |
| 1122 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
| 1123 | |
| 1124 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == |
| 1125 | atomic_read(&vcpu->kvm->online_vcpus)); |
| 1126 | |
| 1127 | if (vcpus_matched && gtod->clock.vclock_mode == VCLOCK_TSC) |
| 1128 | if (!ka->use_master_clock) |
| 1129 | do_request = 1; |
| 1130 | |
| 1131 | if (!vcpus_matched && ka->use_master_clock) |
| 1132 | do_request = 1; |
| 1133 | |
| 1134 | if (do_request) |
| 1135 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
| 1136 | |
| 1137 | trace_kvm_track_tsc(vcpu->vcpu_id, ka->nr_vcpus_matched_tsc, |
| 1138 | atomic_read(&vcpu->kvm->online_vcpus), |
| 1139 | ka->use_master_clock, gtod->clock.vclock_mode); |
| 1140 | #endif |
| 1141 | } |
| 1142 | |
Will Auld | ba90463 | 2012-11-29 12:42:50 -0800 | [diff] [blame] | 1143 | static void update_ia32_tsc_adjust_msr(struct kvm_vcpu *vcpu, s64 offset) |
| 1144 | { |
| 1145 | u64 curr_offset = kvm_x86_ops->read_tsc_offset(vcpu); |
| 1146 | vcpu->arch.ia32_tsc_adjust_msr += offset - curr_offset; |
| 1147 | } |
| 1148 | |
Will Auld | 8fe8ab4 | 2012-11-29 12:42:12 -0800 | [diff] [blame] | 1149 | void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr) |
Zachary Amsden | 99e3e30 | 2010-08-19 22:07:17 -1000 | [diff] [blame] | 1150 | { |
| 1151 | struct kvm *kvm = vcpu->kvm; |
Zachary Amsden | f38e098 | 2010-08-19 22:07:20 -1000 | [diff] [blame] | 1152 | u64 offset, ns, elapsed; |
Zachary Amsden | 99e3e30 | 2010-08-19 22:07:17 -1000 | [diff] [blame] | 1153 | unsigned long flags; |
Marcelo Tosatti | 02626b6 | 2012-03-08 18:46:57 -0300 | [diff] [blame] | 1154 | s64 usdiff; |
Marcelo Tosatti | b48aa97 | 2012-11-27 23:29:03 -0200 | [diff] [blame] | 1155 | bool matched; |
Will Auld | 8fe8ab4 | 2012-11-29 12:42:12 -0800 | [diff] [blame] | 1156 | u64 data = msr->data; |
Zachary Amsden | 99e3e30 | 2010-08-19 22:07:17 -1000 | [diff] [blame] | 1157 | |
Jan Kiszka | 038f8c1 | 2011-02-04 10:49:11 +0100 | [diff] [blame] | 1158 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
Joerg Roedel | 857e409 | 2011-03-25 09:44:50 +0100 | [diff] [blame] | 1159 | offset = kvm_x86_ops->compute_tsc_offset(vcpu, data); |
Zachary Amsden | 759379d | 2010-08-19 22:07:25 -1000 | [diff] [blame] | 1160 | ns = get_kernel_ns(); |
Zachary Amsden | f38e098 | 2010-08-19 22:07:20 -1000 | [diff] [blame] | 1161 | elapsed = ns - kvm->arch.last_tsc_nsec; |
Zachary Amsden | 5d3cb0f6 | 2012-02-03 15:43:51 -0200 | [diff] [blame] | 1162 | |
Marcelo Tosatti | 03ba32c | 2013-03-11 23:10:24 -0300 | [diff] [blame] | 1163 | if (vcpu->arch.virtual_tsc_khz) { |
| 1164 | /* n.b - signed multiplication and division required */ |
| 1165 | usdiff = data - kvm->arch.last_tsc_write; |
Zachary Amsden | 5d3cb0f6 | 2012-02-03 15:43:51 -0200 | [diff] [blame] | 1166 | #ifdef CONFIG_X86_64 |
Marcelo Tosatti | 03ba32c | 2013-03-11 23:10:24 -0300 | [diff] [blame] | 1167 | usdiff = (usdiff * 1000) / vcpu->arch.virtual_tsc_khz; |
Zachary Amsden | 5d3cb0f6 | 2012-02-03 15:43:51 -0200 | [diff] [blame] | 1168 | #else |
Marcelo Tosatti | 03ba32c | 2013-03-11 23:10:24 -0300 | [diff] [blame] | 1169 | /* do_div() only does unsigned */ |
| 1170 | asm("idivl %2; xor %%edx, %%edx" |
| 1171 | : "=A"(usdiff) |
| 1172 | : "A"(usdiff * 1000), "rm"(vcpu->arch.virtual_tsc_khz)); |
Zachary Amsden | 5d3cb0f6 | 2012-02-03 15:43:51 -0200 | [diff] [blame] | 1173 | #endif |
Marcelo Tosatti | 03ba32c | 2013-03-11 23:10:24 -0300 | [diff] [blame] | 1174 | do_div(elapsed, 1000); |
| 1175 | usdiff -= elapsed; |
| 1176 | if (usdiff < 0) |
| 1177 | usdiff = -usdiff; |
| 1178 | } else |
| 1179 | usdiff = USEC_PER_SEC; /* disable TSC match window below */ |
Zachary Amsden | f38e098 | 2010-08-19 22:07:20 -1000 | [diff] [blame] | 1180 | |
| 1181 | /* |
Zachary Amsden | 5d3cb0f6 | 2012-02-03 15:43:51 -0200 | [diff] [blame] | 1182 | * Special case: TSC write with a small delta (1 second) of virtual |
| 1183 | * cycle time against real time is interpreted as an attempt to |
| 1184 | * synchronize the CPU. |
| 1185 | * |
| 1186 | * For a reliable TSC, we can match TSC offsets, and for an unstable |
| 1187 | * TSC, we add elapsed time in this computation. We could let the |
| 1188 | * compensation code attempt to catch up if we fall behind, but |
| 1189 | * it's better to try to match offsets from the beginning. |
| 1190 | */ |
Marcelo Tosatti | 02626b6 | 2012-03-08 18:46:57 -0300 | [diff] [blame] | 1191 | if (usdiff < USEC_PER_SEC && |
Zachary Amsden | 5d3cb0f6 | 2012-02-03 15:43:51 -0200 | [diff] [blame] | 1192 | vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) { |
Zachary Amsden | f38e098 | 2010-08-19 22:07:20 -1000 | [diff] [blame] | 1193 | if (!check_tsc_unstable()) { |
Zachary Amsden | e26101b | 2012-02-03 15:43:57 -0200 | [diff] [blame] | 1194 | offset = kvm->arch.cur_tsc_offset; |
Zachary Amsden | f38e098 | 2010-08-19 22:07:20 -1000 | [diff] [blame] | 1195 | pr_debug("kvm: matched tsc offset for %llu\n", data); |
| 1196 | } else { |
Joerg Roedel | 857e409 | 2011-03-25 09:44:50 +0100 | [diff] [blame] | 1197 | u64 delta = nsec_to_cycles(vcpu, elapsed); |
Zachary Amsden | 5d3cb0f6 | 2012-02-03 15:43:51 -0200 | [diff] [blame] | 1198 | data += delta; |
| 1199 | offset = kvm_x86_ops->compute_tsc_offset(vcpu, data); |
Zachary Amsden | 759379d | 2010-08-19 22:07:25 -1000 | [diff] [blame] | 1200 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); |
Zachary Amsden | f38e098 | 2010-08-19 22:07:20 -1000 | [diff] [blame] | 1201 | } |
Marcelo Tosatti | b48aa97 | 2012-11-27 23:29:03 -0200 | [diff] [blame] | 1202 | matched = true; |
Zachary Amsden | e26101b | 2012-02-03 15:43:57 -0200 | [diff] [blame] | 1203 | } else { |
| 1204 | /* |
| 1205 | * We split periods of matched TSC writes into generations. |
| 1206 | * For each generation, we track the original measured |
| 1207 | * nanosecond time, offset, and write, so if TSCs are in |
| 1208 | * sync, we can match exact offset, and if not, we can match |
Guo Chao | 4a96998 | 2012-06-28 15:17:27 +0800 | [diff] [blame] | 1209 | * exact software computation in compute_guest_tsc() |
Zachary Amsden | e26101b | 2012-02-03 15:43:57 -0200 | [diff] [blame] | 1210 | * |
| 1211 | * These values are tracked in kvm->arch.cur_xxx variables. |
| 1212 | */ |
| 1213 | kvm->arch.cur_tsc_generation++; |
| 1214 | kvm->arch.cur_tsc_nsec = ns; |
| 1215 | kvm->arch.cur_tsc_write = data; |
| 1216 | kvm->arch.cur_tsc_offset = offset; |
Marcelo Tosatti | b48aa97 | 2012-11-27 23:29:03 -0200 | [diff] [blame] | 1217 | matched = false; |
Zachary Amsden | e26101b | 2012-02-03 15:43:57 -0200 | [diff] [blame] | 1218 | pr_debug("kvm: new tsc generation %u, clock %llu\n", |
| 1219 | kvm->arch.cur_tsc_generation, data); |
Zachary Amsden | f38e098 | 2010-08-19 22:07:20 -1000 | [diff] [blame] | 1220 | } |
Zachary Amsden | e26101b | 2012-02-03 15:43:57 -0200 | [diff] [blame] | 1221 | |
| 1222 | /* |
| 1223 | * We also track th most recent recorded KHZ, write and time to |
| 1224 | * allow the matching interval to be extended at each write. |
| 1225 | */ |
Zachary Amsden | f38e098 | 2010-08-19 22:07:20 -1000 | [diff] [blame] | 1226 | kvm->arch.last_tsc_nsec = ns; |
| 1227 | kvm->arch.last_tsc_write = data; |
Zachary Amsden | 5d3cb0f6 | 2012-02-03 15:43:51 -0200 | [diff] [blame] | 1228 | kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz; |
Zachary Amsden | 99e3e30 | 2010-08-19 22:07:17 -1000 | [diff] [blame] | 1229 | |
| 1230 | /* Reset of TSC must disable overshoot protection below */ |
| 1231 | vcpu->arch.hv_clock.tsc_timestamp = 0; |
Zachary Amsden | b183aa5 | 2012-02-03 15:43:53 -0200 | [diff] [blame] | 1232 | vcpu->arch.last_guest_tsc = data; |
Zachary Amsden | e26101b | 2012-02-03 15:43:57 -0200 | [diff] [blame] | 1233 | |
| 1234 | /* Keep track of which generation this VCPU has synchronized to */ |
| 1235 | vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation; |
| 1236 | vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec; |
| 1237 | vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write; |
| 1238 | |
Will Auld | ba90463 | 2012-11-29 12:42:50 -0800 | [diff] [blame] | 1239 | if (guest_cpuid_has_tsc_adjust(vcpu) && !msr->host_initiated) |
| 1240 | update_ia32_tsc_adjust_msr(vcpu, offset); |
Zachary Amsden | e26101b | 2012-02-03 15:43:57 -0200 | [diff] [blame] | 1241 | kvm_x86_ops->write_tsc_offset(vcpu, offset); |
| 1242 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); |
Marcelo Tosatti | b48aa97 | 2012-11-27 23:29:03 -0200 | [diff] [blame] | 1243 | |
| 1244 | spin_lock(&kvm->arch.pvclock_gtod_sync_lock); |
| 1245 | if (matched) |
| 1246 | kvm->arch.nr_vcpus_matched_tsc++; |
| 1247 | else |
| 1248 | kvm->arch.nr_vcpus_matched_tsc = 0; |
| 1249 | |
| 1250 | kvm_track_tsc_matching(vcpu); |
| 1251 | spin_unlock(&kvm->arch.pvclock_gtod_sync_lock); |
Zachary Amsden | 99e3e30 | 2010-08-19 22:07:17 -1000 | [diff] [blame] | 1252 | } |
Zachary Amsden | e26101b | 2012-02-03 15:43:57 -0200 | [diff] [blame] | 1253 | |
Zachary Amsden | 99e3e30 | 2010-08-19 22:07:17 -1000 | [diff] [blame] | 1254 | EXPORT_SYMBOL_GPL(kvm_write_tsc); |
| 1255 | |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1256 | #ifdef CONFIG_X86_64 |
| 1257 | |
| 1258 | static cycle_t read_tsc(void) |
| 1259 | { |
| 1260 | cycle_t ret; |
| 1261 | u64 last; |
| 1262 | |
| 1263 | /* |
| 1264 | * Empirically, a fence (of type that depends on the CPU) |
| 1265 | * before rdtsc is enough to ensure that rdtsc is ordered |
| 1266 | * with respect to loads. The various CPU manuals are unclear |
| 1267 | * as to whether rdtsc can be reordered with later loads, |
| 1268 | * but no one has ever seen it happen. |
| 1269 | */ |
| 1270 | rdtsc_barrier(); |
| 1271 | ret = (cycle_t)vget_cycles(); |
| 1272 | |
| 1273 | last = pvclock_gtod_data.clock.cycle_last; |
| 1274 | |
| 1275 | if (likely(ret >= last)) |
| 1276 | return ret; |
| 1277 | |
| 1278 | /* |
| 1279 | * GCC likes to generate cmov here, but this branch is extremely |
| 1280 | * predictable (it's just a funciton of time and the likely is |
| 1281 | * very likely) and there's a data dependence, so force GCC |
| 1282 | * to generate a branch instead. I don't barrier() because |
| 1283 | * we don't actually need a barrier, and if this function |
| 1284 | * ever gets inlined it will generate worse code. |
| 1285 | */ |
| 1286 | asm volatile (""); |
| 1287 | return last; |
| 1288 | } |
| 1289 | |
| 1290 | static inline u64 vgettsc(cycle_t *cycle_now) |
| 1291 | { |
| 1292 | long v; |
| 1293 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
| 1294 | |
| 1295 | *cycle_now = read_tsc(); |
| 1296 | |
| 1297 | v = (*cycle_now - gtod->clock.cycle_last) & gtod->clock.mask; |
| 1298 | return v * gtod->clock.mult; |
| 1299 | } |
| 1300 | |
| 1301 | static int do_monotonic(struct timespec *ts, cycle_t *cycle_now) |
| 1302 | { |
| 1303 | unsigned long seq; |
| 1304 | u64 ns; |
| 1305 | int mode; |
| 1306 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
| 1307 | |
| 1308 | ts->tv_nsec = 0; |
| 1309 | do { |
| 1310 | seq = read_seqcount_begin(>od->seq); |
| 1311 | mode = gtod->clock.vclock_mode; |
| 1312 | ts->tv_sec = gtod->monotonic_time_sec; |
| 1313 | ns = gtod->monotonic_time_snsec; |
| 1314 | ns += vgettsc(cycle_now); |
| 1315 | ns >>= gtod->clock.shift; |
| 1316 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); |
| 1317 | timespec_add_ns(ts, ns); |
| 1318 | |
| 1319 | return mode; |
| 1320 | } |
| 1321 | |
| 1322 | /* returns true if host is using tsc clocksource */ |
| 1323 | static bool kvm_get_time_and_clockread(s64 *kernel_ns, cycle_t *cycle_now) |
| 1324 | { |
| 1325 | struct timespec ts; |
| 1326 | |
| 1327 | /* checked again under seqlock below */ |
| 1328 | if (pvclock_gtod_data.clock.vclock_mode != VCLOCK_TSC) |
| 1329 | return false; |
| 1330 | |
| 1331 | if (do_monotonic(&ts, cycle_now) != VCLOCK_TSC) |
| 1332 | return false; |
| 1333 | |
| 1334 | monotonic_to_bootbased(&ts); |
| 1335 | *kernel_ns = timespec_to_ns(&ts); |
| 1336 | |
| 1337 | return true; |
| 1338 | } |
| 1339 | #endif |
| 1340 | |
| 1341 | /* |
| 1342 | * |
Marcelo Tosatti | b48aa97 | 2012-11-27 23:29:03 -0200 | [diff] [blame] | 1343 | * Assuming a stable TSC across physical CPUS, and a stable TSC |
| 1344 | * across virtual CPUs, the following condition is possible. |
| 1345 | * Each numbered line represents an event visible to both |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1346 | * CPUs at the next numbered event. |
| 1347 | * |
| 1348 | * "timespecX" represents host monotonic time. "tscX" represents |
| 1349 | * RDTSC value. |
| 1350 | * |
| 1351 | * VCPU0 on CPU0 | VCPU1 on CPU1 |
| 1352 | * |
| 1353 | * 1. read timespec0,tsc0 |
| 1354 | * 2. | timespec1 = timespec0 + N |
| 1355 | * | tsc1 = tsc0 + M |
| 1356 | * 3. transition to guest | transition to guest |
| 1357 | * 4. ret0 = timespec0 + (rdtsc - tsc0) | |
| 1358 | * 5. | ret1 = timespec1 + (rdtsc - tsc1) |
| 1359 | * | ret1 = timespec0 + N + (rdtsc - (tsc0 + M)) |
| 1360 | * |
| 1361 | * Since ret0 update is visible to VCPU1 at time 5, to obey monotonicity: |
| 1362 | * |
| 1363 | * - ret0 < ret1 |
| 1364 | * - timespec0 + (rdtsc - tsc0) < timespec0 + N + (rdtsc - (tsc0 + M)) |
| 1365 | * ... |
| 1366 | * - 0 < N - M => M < N |
| 1367 | * |
| 1368 | * That is, when timespec0 != timespec1, M < N. Unfortunately that is not |
| 1369 | * always the case (the difference between two distinct xtime instances |
| 1370 | * might be smaller then the difference between corresponding TSC reads, |
| 1371 | * when updating guest vcpus pvclock areas). |
| 1372 | * |
| 1373 | * To avoid that problem, do not allow visibility of distinct |
| 1374 | * system_timestamp/tsc_timestamp values simultaneously: use a master |
| 1375 | * copy of host monotonic time values. Update that master copy |
| 1376 | * in lockstep. |
| 1377 | * |
Marcelo Tosatti | b48aa97 | 2012-11-27 23:29:03 -0200 | [diff] [blame] | 1378 | * Rely on synchronization of host TSCs and guest TSCs for monotonicity. |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1379 | * |
| 1380 | */ |
| 1381 | |
| 1382 | static void pvclock_update_vm_gtod_copy(struct kvm *kvm) |
| 1383 | { |
| 1384 | #ifdef CONFIG_X86_64 |
| 1385 | struct kvm_arch *ka = &kvm->arch; |
| 1386 | int vclock_mode; |
Marcelo Tosatti | b48aa97 | 2012-11-27 23:29:03 -0200 | [diff] [blame] | 1387 | bool host_tsc_clocksource, vcpus_matched; |
| 1388 | |
| 1389 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == |
| 1390 | atomic_read(&kvm->online_vcpus)); |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1391 | |
| 1392 | /* |
| 1393 | * If the host uses TSC clock, then passthrough TSC as stable |
| 1394 | * to the guest. |
| 1395 | */ |
Marcelo Tosatti | b48aa97 | 2012-11-27 23:29:03 -0200 | [diff] [blame] | 1396 | host_tsc_clocksource = kvm_get_time_and_clockread( |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1397 | &ka->master_kernel_ns, |
| 1398 | &ka->master_cycle_now); |
| 1399 | |
Marcelo Tosatti | b48aa97 | 2012-11-27 23:29:03 -0200 | [diff] [blame] | 1400 | ka->use_master_clock = host_tsc_clocksource & vcpus_matched; |
| 1401 | |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1402 | if (ka->use_master_clock) |
| 1403 | atomic_set(&kvm_guest_has_master_clock, 1); |
| 1404 | |
| 1405 | vclock_mode = pvclock_gtod_data.clock.vclock_mode; |
Marcelo Tosatti | b48aa97 | 2012-11-27 23:29:03 -0200 | [diff] [blame] | 1406 | trace_kvm_update_master_clock(ka->use_master_clock, vclock_mode, |
| 1407 | vcpus_matched); |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1408 | #endif |
| 1409 | } |
| 1410 | |
Zachary Amsden | 34c238a | 2010-09-18 14:38:14 -1000 | [diff] [blame] | 1411 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1412 | { |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1413 | unsigned long flags, this_tsc_khz; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1414 | struct kvm_vcpu_arch *vcpu = &v->arch; |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1415 | struct kvm_arch *ka = &v->kvm->arch; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1416 | void *shared_kaddr; |
Zachary Amsden | 1d5f066 | 2010-08-19 22:07:30 -1000 | [diff] [blame] | 1417 | s64 kernel_ns, max_kernel_ns; |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1418 | u64 tsc_timestamp, host_tsc; |
Marcelo Tosatti | 78c0337 | 2012-11-27 23:28:47 -0200 | [diff] [blame] | 1419 | struct pvclock_vcpu_time_info *guest_hv_clock; |
Marcelo Tosatti | 51d59c6 | 2012-08-03 15:57:49 -0300 | [diff] [blame] | 1420 | u8 pvclock_flags; |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1421 | bool use_master_clock; |
| 1422 | |
| 1423 | kernel_ns = 0; |
| 1424 | host_tsc = 0; |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 1425 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1426 | /* Keep irq disabled to prevent changes to the clock */ |
| 1427 | local_irq_save(flags); |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 1428 | this_tsc_khz = __get_cpu_var(cpu_tsc_khz); |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 1429 | if (unlikely(this_tsc_khz == 0)) { |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 1430 | local_irq_restore(flags); |
Zachary Amsden | 34c238a | 2010-09-18 14:38:14 -1000 | [diff] [blame] | 1431 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 1432 | return 1; |
| 1433 | } |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1434 | |
Zachary Amsden | 1d5f066 | 2010-08-19 22:07:30 -1000 | [diff] [blame] | 1435 | /* |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1436 | * If the host uses TSC clock, then passthrough TSC as stable |
| 1437 | * to the guest. |
| 1438 | */ |
| 1439 | spin_lock(&ka->pvclock_gtod_sync_lock); |
| 1440 | use_master_clock = ka->use_master_clock; |
| 1441 | if (use_master_clock) { |
| 1442 | host_tsc = ka->master_cycle_now; |
| 1443 | kernel_ns = ka->master_kernel_ns; |
| 1444 | } |
| 1445 | spin_unlock(&ka->pvclock_gtod_sync_lock); |
| 1446 | if (!use_master_clock) { |
| 1447 | host_tsc = native_read_tsc(); |
| 1448 | kernel_ns = get_kernel_ns(); |
| 1449 | } |
| 1450 | |
| 1451 | tsc_timestamp = kvm_x86_ops->read_l1_tsc(v, host_tsc); |
| 1452 | |
| 1453 | /* |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 1454 | * We may have to catch up the TSC to match elapsed wall clock |
| 1455 | * time for two reasons, even if kvmclock is used. |
| 1456 | * 1) CPU could have been running below the maximum TSC rate |
| 1457 | * 2) Broken TSC compensation resets the base at each VCPU |
| 1458 | * entry to avoid unknown leaps of TSC even when running |
| 1459 | * again on the same CPU. This may cause apparent elapsed |
| 1460 | * time to disappear, and the guest to stand still or run |
| 1461 | * very slowly. |
| 1462 | */ |
| 1463 | if (vcpu->tsc_catchup) { |
| 1464 | u64 tsc = compute_guest_tsc(v, kernel_ns); |
| 1465 | if (tsc > tsc_timestamp) { |
Marcelo Tosatti | f1e2b26 | 2012-02-03 15:43:55 -0200 | [diff] [blame] | 1466 | adjust_tsc_offset_guest(v, tsc - tsc_timestamp); |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 1467 | tsc_timestamp = tsc; |
| 1468 | } |
| 1469 | } |
| 1470 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1471 | local_irq_restore(flags); |
| 1472 | |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 1473 | if (!vcpu->time_page) |
| 1474 | return 0; |
| 1475 | |
| 1476 | /* |
Zachary Amsden | 1d5f066 | 2010-08-19 22:07:30 -1000 | [diff] [blame] | 1477 | * Time as measured by the TSC may go backwards when resetting the base |
| 1478 | * tsc_timestamp. The reason for this is that the TSC resolution is |
| 1479 | * higher than the resolution of the other clock scales. Thus, many |
| 1480 | * possible measurments of the TSC correspond to one measurement of any |
| 1481 | * other clock, and so a spread of values is possible. This is not a |
| 1482 | * problem for the computation of the nanosecond clock; with TSC rates |
| 1483 | * around 1GHZ, there can only be a few cycles which correspond to one |
| 1484 | * nanosecond value, and any path through this code will inevitably |
| 1485 | * take longer than that. However, with the kernel_ns value itself, |
| 1486 | * the precision may be much lower, down to HZ granularity. If the |
| 1487 | * first sampling of TSC against kernel_ns ends in the low part of the |
| 1488 | * range, and the second in the high end of the range, we can get: |
| 1489 | * |
| 1490 | * (TSC - offset_low) * S + kns_old > (TSC - offset_high) * S + kns_new |
| 1491 | * |
| 1492 | * As the sampling errors potentially range in the thousands of cycles, |
| 1493 | * it is possible such a time value has already been observed by the |
| 1494 | * guest. To protect against this, we must compute the system time as |
| 1495 | * observed by the guest and ensure the new system time is greater. |
| 1496 | */ |
| 1497 | max_kernel_ns = 0; |
Zachary Amsden | b183aa5 | 2012-02-03 15:43:53 -0200 | [diff] [blame] | 1498 | if (vcpu->hv_clock.tsc_timestamp) { |
Zachary Amsden | 1d5f066 | 2010-08-19 22:07:30 -1000 | [diff] [blame] | 1499 | max_kernel_ns = vcpu->last_guest_tsc - |
| 1500 | vcpu->hv_clock.tsc_timestamp; |
| 1501 | max_kernel_ns = pvclock_scale_delta(max_kernel_ns, |
| 1502 | vcpu->hv_clock.tsc_to_system_mul, |
| 1503 | vcpu->hv_clock.tsc_shift); |
| 1504 | max_kernel_ns += vcpu->last_kernel_ns; |
| 1505 | } |
| 1506 | |
Zachary Amsden | e48672f | 2010-08-19 22:07:23 -1000 | [diff] [blame] | 1507 | if (unlikely(vcpu->hw_tsc_khz != this_tsc_khz)) { |
Zachary Amsden | 5f4e3f8 | 2010-09-18 14:38:13 -1000 | [diff] [blame] | 1508 | kvm_get_time_scale(NSEC_PER_SEC / 1000, this_tsc_khz, |
| 1509 | &vcpu->hv_clock.tsc_shift, |
| 1510 | &vcpu->hv_clock.tsc_to_system_mul); |
Zachary Amsden | e48672f | 2010-08-19 22:07:23 -1000 | [diff] [blame] | 1511 | vcpu->hw_tsc_khz = this_tsc_khz; |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 1512 | } |
| 1513 | |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1514 | /* with a master <monotonic time, tsc value> tuple, |
| 1515 | * pvclock clock reads always increase at the (scaled) rate |
| 1516 | * of guest TSC - no need to deal with sampling errors. |
| 1517 | */ |
| 1518 | if (!use_master_clock) { |
| 1519 | if (max_kernel_ns > kernel_ns) |
| 1520 | kernel_ns = max_kernel_ns; |
| 1521 | } |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1522 | /* With all the info we got, fill in the values */ |
Zachary Amsden | 1d5f066 | 2010-08-19 22:07:30 -1000 | [diff] [blame] | 1523 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
Zachary Amsden | 759379d | 2010-08-19 22:07:25 -1000 | [diff] [blame] | 1524 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
Zachary Amsden | 1d5f066 | 2010-08-19 22:07:30 -1000 | [diff] [blame] | 1525 | vcpu->last_kernel_ns = kernel_ns; |
Zachary Amsden | 28e4639 | 2010-09-18 14:38:12 -1000 | [diff] [blame] | 1526 | vcpu->last_guest_tsc = tsc_timestamp; |
Marcelo Tosatti | 51d59c6 | 2012-08-03 15:57:49 -0300 | [diff] [blame] | 1527 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1528 | /* |
| 1529 | * The interface expects us to write an even number signaling that the |
| 1530 | * update is finished. Since the guest won't see the intermediate |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 1531 | * state, we just increase by 2 at the end. |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1532 | */ |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 1533 | vcpu->hv_clock.version += 2; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1534 | |
Cong Wang | 8fd75e1 | 2011-11-25 23:14:17 +0800 | [diff] [blame] | 1535 | shared_kaddr = kmap_atomic(vcpu->time_page); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1536 | |
Marcelo Tosatti | 78c0337 | 2012-11-27 23:28:47 -0200 | [diff] [blame] | 1537 | guest_hv_clock = shared_kaddr + vcpu->time_offset; |
| 1538 | |
| 1539 | /* retain PVCLOCK_GUEST_STOPPED if set in guest copy */ |
| 1540 | pvclock_flags = (guest_hv_clock->flags & PVCLOCK_GUEST_STOPPED); |
| 1541 | |
| 1542 | if (vcpu->pvclock_set_guest_stopped_request) { |
| 1543 | pvclock_flags |= PVCLOCK_GUEST_STOPPED; |
| 1544 | vcpu->pvclock_set_guest_stopped_request = false; |
| 1545 | } |
| 1546 | |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 1547 | /* If the host uses TSC clocksource, then it is stable */ |
| 1548 | if (use_master_clock) |
| 1549 | pvclock_flags |= PVCLOCK_TSC_STABLE_BIT; |
| 1550 | |
Marcelo Tosatti | 78c0337 | 2012-11-27 23:28:47 -0200 | [diff] [blame] | 1551 | vcpu->hv_clock.flags = pvclock_flags; |
| 1552 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1553 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 1554 | sizeof(vcpu->hv_clock)); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1555 | |
Cong Wang | 8fd75e1 | 2011-11-25 23:14:17 +0800 | [diff] [blame] | 1556 | kunmap_atomic(shared_kaddr); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1557 | |
| 1558 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 1559 | return 0; |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 1560 | } |
| 1561 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 1562 | static bool msr_mtrr_valid(unsigned msr) |
| 1563 | { |
| 1564 | switch (msr) { |
| 1565 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: |
| 1566 | case MSR_MTRRfix64K_00000: |
| 1567 | case MSR_MTRRfix16K_80000: |
| 1568 | case MSR_MTRRfix16K_A0000: |
| 1569 | case MSR_MTRRfix4K_C0000: |
| 1570 | case MSR_MTRRfix4K_C8000: |
| 1571 | case MSR_MTRRfix4K_D0000: |
| 1572 | case MSR_MTRRfix4K_D8000: |
| 1573 | case MSR_MTRRfix4K_E0000: |
| 1574 | case MSR_MTRRfix4K_E8000: |
| 1575 | case MSR_MTRRfix4K_F0000: |
| 1576 | case MSR_MTRRfix4K_F8000: |
| 1577 | case MSR_MTRRdefType: |
| 1578 | case MSR_IA32_CR_PAT: |
| 1579 | return true; |
| 1580 | case 0x2f8: |
| 1581 | return true; |
| 1582 | } |
| 1583 | return false; |
| 1584 | } |
| 1585 | |
Marcelo Tosatti | d6289b9 | 2009-06-22 15:27:56 -0300 | [diff] [blame] | 1586 | static bool valid_pat_type(unsigned t) |
| 1587 | { |
| 1588 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ |
| 1589 | } |
| 1590 | |
| 1591 | static bool valid_mtrr_type(unsigned t) |
| 1592 | { |
| 1593 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ |
| 1594 | } |
| 1595 | |
| 1596 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 1597 | { |
| 1598 | int i; |
| 1599 | |
| 1600 | if (!msr_mtrr_valid(msr)) |
| 1601 | return false; |
| 1602 | |
| 1603 | if (msr == MSR_IA32_CR_PAT) { |
| 1604 | for (i = 0; i < 8; i++) |
| 1605 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) |
| 1606 | return false; |
| 1607 | return true; |
| 1608 | } else if (msr == MSR_MTRRdefType) { |
| 1609 | if (data & ~0xcff) |
| 1610 | return false; |
| 1611 | return valid_mtrr_type(data & 0xff); |
| 1612 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { |
| 1613 | for (i = 0; i < 8 ; i++) |
| 1614 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) |
| 1615 | return false; |
| 1616 | return true; |
| 1617 | } |
| 1618 | |
| 1619 | /* variable MTRRs */ |
| 1620 | return valid_mtrr_type(data & 0xff); |
| 1621 | } |
| 1622 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 1623 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 1624 | { |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 1625 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
| 1626 | |
Marcelo Tosatti | d6289b9 | 2009-06-22 15:27:56 -0300 | [diff] [blame] | 1627 | if (!mtrr_valid(vcpu, msr, data)) |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 1628 | return 1; |
| 1629 | |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 1630 | if (msr == MSR_MTRRdefType) { |
| 1631 | vcpu->arch.mtrr_state.def_type = data; |
| 1632 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; |
| 1633 | } else if (msr == MSR_MTRRfix64K_00000) |
| 1634 | p[0] = data; |
| 1635 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) |
| 1636 | p[1 + msr - MSR_MTRRfix16K_80000] = data; |
| 1637 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) |
| 1638 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; |
| 1639 | else if (msr == MSR_IA32_CR_PAT) |
| 1640 | vcpu->arch.pat = data; |
| 1641 | else { /* Variable MTRRs */ |
| 1642 | int idx, is_mtrr_mask; |
| 1643 | u64 *pt; |
| 1644 | |
| 1645 | idx = (msr - 0x200) / 2; |
| 1646 | is_mtrr_mask = msr - 0x200 - 2 * idx; |
| 1647 | if (!is_mtrr_mask) |
| 1648 | pt = |
| 1649 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; |
| 1650 | else |
| 1651 | pt = |
| 1652 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; |
| 1653 | *pt = data; |
| 1654 | } |
| 1655 | |
| 1656 | kvm_mmu_reset_context(vcpu); |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 1657 | return 0; |
| 1658 | } |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1659 | |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 1660 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 1661 | { |
| 1662 | u64 mcg_cap = vcpu->arch.mcg_cap; |
| 1663 | unsigned bank_num = mcg_cap & 0xff; |
| 1664 | |
| 1665 | switch (msr) { |
| 1666 | case MSR_IA32_MCG_STATUS: |
| 1667 | vcpu->arch.mcg_status = data; |
| 1668 | break; |
| 1669 | case MSR_IA32_MCG_CTL: |
| 1670 | if (!(mcg_cap & MCG_CTL_P)) |
| 1671 | return 1; |
| 1672 | if (data != 0 && data != ~(u64)0) |
| 1673 | return -1; |
| 1674 | vcpu->arch.mcg_ctl = data; |
| 1675 | break; |
| 1676 | default: |
| 1677 | if (msr >= MSR_IA32_MC0_CTL && |
| 1678 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { |
| 1679 | u32 offset = msr - MSR_IA32_MC0_CTL; |
Andre Przywara | 114be42 | 2010-03-24 17:46:42 +0100 | [diff] [blame] | 1680 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
| 1681 | * some Linux kernels though clear bit 10 in bank 4 to |
| 1682 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore |
| 1683 | * this to avoid an uncatched #GP in the guest |
| 1684 | */ |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 1685 | if ((offset & 0x3) == 0 && |
Andre Przywara | 114be42 | 2010-03-24 17:46:42 +0100 | [diff] [blame] | 1686 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 1687 | return -1; |
| 1688 | vcpu->arch.mce_banks[offset] = data; |
| 1689 | break; |
| 1690 | } |
| 1691 | return 1; |
| 1692 | } |
| 1693 | return 0; |
| 1694 | } |
| 1695 | |
Ed Swierk | ffde22a | 2009-10-15 15:21:43 -0700 | [diff] [blame] | 1696 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
| 1697 | { |
| 1698 | struct kvm *kvm = vcpu->kvm; |
| 1699 | int lm = is_long_mode(vcpu); |
| 1700 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 |
| 1701 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; |
| 1702 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 |
| 1703 | : kvm->arch.xen_hvm_config.blob_size_32; |
| 1704 | u32 page_num = data & ~PAGE_MASK; |
| 1705 | u64 page_addr = data & PAGE_MASK; |
| 1706 | u8 *page; |
| 1707 | int r; |
| 1708 | |
| 1709 | r = -E2BIG; |
| 1710 | if (page_num >= blob_size) |
| 1711 | goto out; |
| 1712 | r = -ENOMEM; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1713 | page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); |
| 1714 | if (IS_ERR(page)) { |
| 1715 | r = PTR_ERR(page); |
Ed Swierk | ffde22a | 2009-10-15 15:21:43 -0700 | [diff] [blame] | 1716 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1717 | } |
Ed Swierk | ffde22a | 2009-10-15 15:21:43 -0700 | [diff] [blame] | 1718 | if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) |
| 1719 | goto out_free; |
| 1720 | r = 0; |
| 1721 | out_free: |
| 1722 | kfree(page); |
| 1723 | out: |
| 1724 | return r; |
| 1725 | } |
| 1726 | |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 1727 | static bool kvm_hv_hypercall_enabled(struct kvm *kvm) |
| 1728 | { |
| 1729 | return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE; |
| 1730 | } |
| 1731 | |
| 1732 | static bool kvm_hv_msr_partition_wide(u32 msr) |
| 1733 | { |
| 1734 | bool r = false; |
| 1735 | switch (msr) { |
| 1736 | case HV_X64_MSR_GUEST_OS_ID: |
| 1737 | case HV_X64_MSR_HYPERCALL: |
| 1738 | r = true; |
| 1739 | break; |
| 1740 | } |
| 1741 | |
| 1742 | return r; |
| 1743 | } |
| 1744 | |
| 1745 | static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 1746 | { |
| 1747 | struct kvm *kvm = vcpu->kvm; |
| 1748 | |
| 1749 | switch (msr) { |
| 1750 | case HV_X64_MSR_GUEST_OS_ID: |
| 1751 | kvm->arch.hv_guest_os_id = data; |
| 1752 | /* setting guest os id to zero disables hypercall page */ |
| 1753 | if (!kvm->arch.hv_guest_os_id) |
| 1754 | kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE; |
| 1755 | break; |
| 1756 | case HV_X64_MSR_HYPERCALL: { |
| 1757 | u64 gfn; |
| 1758 | unsigned long addr; |
| 1759 | u8 instructions[4]; |
| 1760 | |
| 1761 | /* if guest os id is not set hypercall should remain disabled */ |
| 1762 | if (!kvm->arch.hv_guest_os_id) |
| 1763 | break; |
| 1764 | if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) { |
| 1765 | kvm->arch.hv_hypercall = data; |
| 1766 | break; |
| 1767 | } |
| 1768 | gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT; |
| 1769 | addr = gfn_to_hva(kvm, gfn); |
| 1770 | if (kvm_is_error_hva(addr)) |
| 1771 | return 1; |
| 1772 | kvm_x86_ops->patch_hypercall(vcpu, instructions); |
| 1773 | ((unsigned char *)instructions)[3] = 0xc3; /* ret */ |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1774 | if (__copy_to_user((void __user *)addr, instructions, 4)) |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 1775 | return 1; |
| 1776 | kvm->arch.hv_hypercall = data; |
| 1777 | break; |
| 1778 | } |
| 1779 | default: |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 1780 | vcpu_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " |
| 1781 | "data 0x%llx\n", msr, data); |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 1782 | return 1; |
| 1783 | } |
| 1784 | return 0; |
| 1785 | } |
| 1786 | |
| 1787 | static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 1788 | { |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 1789 | switch (msr) { |
| 1790 | case HV_X64_MSR_APIC_ASSIST_PAGE: { |
| 1791 | unsigned long addr; |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 1792 | |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 1793 | if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) { |
| 1794 | vcpu->arch.hv_vapic = data; |
| 1795 | break; |
| 1796 | } |
| 1797 | addr = gfn_to_hva(vcpu->kvm, data >> |
| 1798 | HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT); |
| 1799 | if (kvm_is_error_hva(addr)) |
| 1800 | return 1; |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1801 | if (__clear_user((void __user *)addr, PAGE_SIZE)) |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 1802 | return 1; |
| 1803 | vcpu->arch.hv_vapic = data; |
| 1804 | break; |
| 1805 | } |
| 1806 | case HV_X64_MSR_EOI: |
| 1807 | return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data); |
| 1808 | case HV_X64_MSR_ICR: |
| 1809 | return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data); |
| 1810 | case HV_X64_MSR_TPR: |
| 1811 | return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data); |
| 1812 | default: |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 1813 | vcpu_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " |
| 1814 | "data 0x%llx\n", msr, data); |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 1815 | return 1; |
| 1816 | } |
| 1817 | |
| 1818 | return 0; |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 1819 | } |
| 1820 | |
Gleb Natapov | 344d958 | 2010-10-14 11:22:50 +0200 | [diff] [blame] | 1821 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
| 1822 | { |
| 1823 | gpa_t gpa = data & ~0x3f; |
| 1824 | |
Guo Chao | 4a96998 | 2012-06-28 15:17:27 +0800 | [diff] [blame] | 1825 | /* Bits 2:5 are reserved, Should be zero */ |
Gleb Natapov | 6adba52 | 2010-10-14 11:22:55 +0200 | [diff] [blame] | 1826 | if (data & 0x3c) |
Gleb Natapov | 344d958 | 2010-10-14 11:22:50 +0200 | [diff] [blame] | 1827 | return 1; |
| 1828 | |
| 1829 | vcpu->arch.apf.msr_val = data; |
| 1830 | |
| 1831 | if (!(data & KVM_ASYNC_PF_ENABLED)) { |
| 1832 | kvm_clear_async_pf_completion_queue(vcpu); |
| 1833 | kvm_async_pf_hash_reset(vcpu); |
| 1834 | return 0; |
| 1835 | } |
| 1836 | |
| 1837 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa)) |
| 1838 | return 1; |
| 1839 | |
Gleb Natapov | 6adba52 | 2010-10-14 11:22:55 +0200 | [diff] [blame] | 1840 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
Gleb Natapov | 344d958 | 2010-10-14 11:22:50 +0200 | [diff] [blame] | 1841 | kvm_async_pf_wakeup_all(vcpu); |
| 1842 | return 0; |
| 1843 | } |
| 1844 | |
Glauber Costa | 12f9a48 | 2011-02-01 14:16:40 -0500 | [diff] [blame] | 1845 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
| 1846 | { |
| 1847 | if (vcpu->arch.time_page) { |
| 1848 | kvm_release_page_dirty(vcpu->arch.time_page); |
| 1849 | vcpu->arch.time_page = NULL; |
| 1850 | } |
| 1851 | } |
| 1852 | |
Glauber Costa | c9aaa89 | 2011-07-11 15:28:14 -0400 | [diff] [blame] | 1853 | static void accumulate_steal_time(struct kvm_vcpu *vcpu) |
| 1854 | { |
| 1855 | u64 delta; |
| 1856 | |
| 1857 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) |
| 1858 | return; |
| 1859 | |
| 1860 | delta = current->sched_info.run_delay - vcpu->arch.st.last_steal; |
| 1861 | vcpu->arch.st.last_steal = current->sched_info.run_delay; |
| 1862 | vcpu->arch.st.accum_steal = delta; |
| 1863 | } |
| 1864 | |
| 1865 | static void record_steal_time(struct kvm_vcpu *vcpu) |
| 1866 | { |
| 1867 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) |
| 1868 | return; |
| 1869 | |
| 1870 | if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
| 1871 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) |
| 1872 | return; |
| 1873 | |
| 1874 | vcpu->arch.st.steal.steal += vcpu->arch.st.accum_steal; |
| 1875 | vcpu->arch.st.steal.version += 2; |
| 1876 | vcpu->arch.st.accum_steal = 0; |
| 1877 | |
| 1878 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
| 1879 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
| 1880 | } |
| 1881 | |
Will Auld | 8fe8ab4 | 2012-11-29 12:42:12 -0800 | [diff] [blame] | 1882 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1883 | { |
Gleb Natapov | 5753785 | 2012-01-15 14:17:22 +0200 | [diff] [blame] | 1884 | bool pr = false; |
Will Auld | 8fe8ab4 | 2012-11-29 12:42:12 -0800 | [diff] [blame] | 1885 | u32 msr = msr_info->index; |
| 1886 | u64 data = msr_info->data; |
Gleb Natapov | 5753785 | 2012-01-15 14:17:22 +0200 | [diff] [blame] | 1887 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1888 | switch (msr) { |
Borislav Petkov | 2e32b71 | 2013-02-19 19:33:13 +0100 | [diff] [blame] | 1889 | case MSR_AMD64_NB_CFG: |
| 1890 | case MSR_IA32_UCODE_REV: |
| 1891 | case MSR_IA32_UCODE_WRITE: |
| 1892 | case MSR_VM_HSAVE_PA: |
| 1893 | case MSR_AMD64_PATCH_LOADER: |
| 1894 | case MSR_AMD64_BU_CFG2: |
| 1895 | break; |
| 1896 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1897 | case MSR_EFER: |
Roedel, Joerg | b69e8ca | 2010-05-06 11:38:43 +0200 | [diff] [blame] | 1898 | return set_efer(vcpu, data); |
Andre Przywara | 8f1589d | 2009-06-24 12:44:33 +0200 | [diff] [blame] | 1899 | case MSR_K7_HWCR: |
| 1900 | data &= ~(u64)0x40; /* ignore flush filter disable */ |
Joerg Roedel | 8249402 | 2010-02-24 18:59:16 +0100 | [diff] [blame] | 1901 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
Nicolae Mogoreanu | a223c31 | 2012-02-21 13:44:21 -0800 | [diff] [blame] | 1902 | data &= ~(u64)0x8; /* ignore TLB cache disable */ |
Andre Przywara | 8f1589d | 2009-06-24 12:44:33 +0200 | [diff] [blame] | 1903 | if (data != 0) { |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 1904 | vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", |
| 1905 | data); |
Andre Przywara | 8f1589d | 2009-06-24 12:44:33 +0200 | [diff] [blame] | 1906 | return 1; |
| 1907 | } |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1908 | break; |
Andre Przywara | f7c6d14 | 2009-07-02 15:04:14 +0200 | [diff] [blame] | 1909 | case MSR_FAM10H_MMIO_CONF_BASE: |
| 1910 | if (data != 0) { |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 1911 | vcpu_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " |
| 1912 | "0x%llx\n", data); |
Andre Przywara | f7c6d14 | 2009-07-02 15:04:14 +0200 | [diff] [blame] | 1913 | return 1; |
| 1914 | } |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1915 | break; |
Alexander Graf | b5e2fec | 2008-07-22 08:00:45 +0200 | [diff] [blame] | 1916 | case MSR_IA32_DEBUGCTLMSR: |
| 1917 | if (!data) { |
| 1918 | /* We support the non-activated case already */ |
| 1919 | break; |
| 1920 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { |
| 1921 | /* Values other than LBR and BTF are vendor-specific, |
| 1922 | thus reserved and should throw a #GP */ |
| 1923 | return 1; |
| 1924 | } |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 1925 | vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
| 1926 | __func__, data); |
Alexander Graf | b5e2fec | 2008-07-22 08:00:45 +0200 | [diff] [blame] | 1927 | break; |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 1928 | case 0x200 ... 0x2ff: |
| 1929 | return set_msr_mtrr(vcpu, msr, data); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1930 | case MSR_IA32_APICBASE: |
| 1931 | kvm_set_apic_base(vcpu, data); |
| 1932 | break; |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 1933 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
| 1934 | return kvm_x2apic_msr_write(vcpu, msr, data); |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 1935 | case MSR_IA32_TSCDEADLINE: |
| 1936 | kvm_set_lapic_tscdeadline_msr(vcpu, data); |
| 1937 | break; |
Will Auld | ba90463 | 2012-11-29 12:42:50 -0800 | [diff] [blame] | 1938 | case MSR_IA32_TSC_ADJUST: |
| 1939 | if (guest_cpuid_has_tsc_adjust(vcpu)) { |
| 1940 | if (!msr_info->host_initiated) { |
| 1941 | u64 adj = data - vcpu->arch.ia32_tsc_adjust_msr; |
| 1942 | kvm_x86_ops->adjust_tsc_offset(vcpu, adj, true); |
| 1943 | } |
| 1944 | vcpu->arch.ia32_tsc_adjust_msr = data; |
| 1945 | } |
| 1946 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1947 | case MSR_IA32_MISC_ENABLE: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1948 | vcpu->arch.ia32_misc_enable_msr = data; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1949 | break; |
Glauber Costa | 11c6bff | 2010-05-11 12:17:41 -0400 | [diff] [blame] | 1950 | case MSR_KVM_WALL_CLOCK_NEW: |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1951 | case MSR_KVM_WALL_CLOCK: |
| 1952 | vcpu->kvm->arch.wall_clock = data; |
| 1953 | kvm_write_wall_clock(vcpu->kvm, data); |
| 1954 | break; |
Glauber Costa | 11c6bff | 2010-05-11 12:17:41 -0400 | [diff] [blame] | 1955 | case MSR_KVM_SYSTEM_TIME_NEW: |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1956 | case MSR_KVM_SYSTEM_TIME: { |
Glauber Costa | 12f9a48 | 2011-02-01 14:16:40 -0500 | [diff] [blame] | 1957 | kvmclock_reset(vcpu); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1958 | |
| 1959 | vcpu->arch.time = data; |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 1960 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1961 | |
| 1962 | /* we verify if the enable bit is set... */ |
| 1963 | if (!(data & 1)) |
| 1964 | break; |
| 1965 | |
| 1966 | /* ...but clean it before doing the actual write */ |
| 1967 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); |
| 1968 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1969 | vcpu->arch.time_page = |
| 1970 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1971 | |
Xiao Guangrong | 32cad84 | 2012-08-03 15:42:52 +0800 | [diff] [blame] | 1972 | if (is_error_page(vcpu->arch.time_page)) |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1973 | vcpu->arch.time_page = NULL; |
Xiao Guangrong | 32cad84 | 2012-08-03 15:42:52 +0800 | [diff] [blame] | 1974 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1975 | break; |
| 1976 | } |
Gleb Natapov | 344d958 | 2010-10-14 11:22:50 +0200 | [diff] [blame] | 1977 | case MSR_KVM_ASYNC_PF_EN: |
| 1978 | if (kvm_pv_enable_async_pf(vcpu, data)) |
| 1979 | return 1; |
| 1980 | break; |
Glauber Costa | c9aaa89 | 2011-07-11 15:28:14 -0400 | [diff] [blame] | 1981 | case MSR_KVM_STEAL_TIME: |
| 1982 | |
| 1983 | if (unlikely(!sched_info_on())) |
| 1984 | return 1; |
| 1985 | |
| 1986 | if (data & KVM_STEAL_RESERVED_MASK) |
| 1987 | return 1; |
| 1988 | |
| 1989 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime, |
| 1990 | data & KVM_STEAL_VALID_BITS)) |
| 1991 | return 1; |
| 1992 | |
| 1993 | vcpu->arch.st.msr_val = data; |
| 1994 | |
| 1995 | if (!(data & KVM_MSR_ENABLED)) |
| 1996 | break; |
| 1997 | |
| 1998 | vcpu->arch.st.last_steal = current->sched_info.run_delay; |
| 1999 | |
| 2000 | preempt_disable(); |
| 2001 | accumulate_steal_time(vcpu); |
| 2002 | preempt_enable(); |
| 2003 | |
| 2004 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
| 2005 | |
| 2006 | break; |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 2007 | case MSR_KVM_PV_EOI_EN: |
| 2008 | if (kvm_lapic_enable_pv_eoi(vcpu, data)) |
| 2009 | return 1; |
| 2010 | break; |
Glauber Costa | c9aaa89 | 2011-07-11 15:28:14 -0400 | [diff] [blame] | 2011 | |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 2012 | case MSR_IA32_MCG_CTL: |
| 2013 | case MSR_IA32_MCG_STATUS: |
| 2014 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: |
| 2015 | return set_msr_mce(vcpu, msr, data); |
Andre Przywara | 71db602 | 2009-06-12 22:01:29 +0200 | [diff] [blame] | 2016 | |
| 2017 | /* Performance counters are not protected by a CPUID bit, |
| 2018 | * so we should check all of them in the generic path for the sake of |
| 2019 | * cross vendor migration. |
| 2020 | * Writing a zero into the event select MSRs disables them, |
| 2021 | * which we perfectly emulate ;-). Any other value should be at least |
| 2022 | * reported, some guests depend on them. |
| 2023 | */ |
Andre Przywara | 71db602 | 2009-06-12 22:01:29 +0200 | [diff] [blame] | 2024 | case MSR_K7_EVNTSEL0: |
| 2025 | case MSR_K7_EVNTSEL1: |
| 2026 | case MSR_K7_EVNTSEL2: |
| 2027 | case MSR_K7_EVNTSEL3: |
| 2028 | if (data != 0) |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 2029 | vcpu_unimpl(vcpu, "unimplemented perfctr wrmsr: " |
| 2030 | "0x%x data 0x%llx\n", msr, data); |
Andre Przywara | 71db602 | 2009-06-12 22:01:29 +0200 | [diff] [blame] | 2031 | break; |
| 2032 | /* at least RHEL 4 unconditionally writes to the perfctr registers, |
| 2033 | * so we ignore writes to make it happy. |
| 2034 | */ |
Andre Przywara | 71db602 | 2009-06-12 22:01:29 +0200 | [diff] [blame] | 2035 | case MSR_K7_PERFCTR0: |
| 2036 | case MSR_K7_PERFCTR1: |
| 2037 | case MSR_K7_PERFCTR2: |
| 2038 | case MSR_K7_PERFCTR3: |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 2039 | vcpu_unimpl(vcpu, "unimplemented perfctr wrmsr: " |
| 2040 | "0x%x data 0x%llx\n", msr, data); |
Andre Przywara | 71db602 | 2009-06-12 22:01:29 +0200 | [diff] [blame] | 2041 | break; |
Gleb Natapov | 5753785 | 2012-01-15 14:17:22 +0200 | [diff] [blame] | 2042 | case MSR_P6_PERFCTR0: |
| 2043 | case MSR_P6_PERFCTR1: |
| 2044 | pr = true; |
| 2045 | case MSR_P6_EVNTSEL0: |
| 2046 | case MSR_P6_EVNTSEL1: |
| 2047 | if (kvm_pmu_msr(vcpu, msr)) |
| 2048 | return kvm_pmu_set_msr(vcpu, msr, data); |
| 2049 | |
| 2050 | if (pr || data != 0) |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 2051 | vcpu_unimpl(vcpu, "disabled perfctr wrmsr: " |
| 2052 | "0x%x data 0x%llx\n", msr, data); |
Gleb Natapov | 5753785 | 2012-01-15 14:17:22 +0200 | [diff] [blame] | 2053 | break; |
Jes Sorensen | 84e0cef | 2010-09-01 11:42:04 +0200 | [diff] [blame] | 2054 | case MSR_K7_CLK_CTL: |
| 2055 | /* |
| 2056 | * Ignore all writes to this no longer documented MSR. |
| 2057 | * Writes are only relevant for old K7 processors, |
| 2058 | * all pre-dating SVM, but a recommended workaround from |
Guo Chao | 4a96998 | 2012-06-28 15:17:27 +0800 | [diff] [blame] | 2059 | * AMD for these chips. It is possible to specify the |
Jes Sorensen | 84e0cef | 2010-09-01 11:42:04 +0200 | [diff] [blame] | 2060 | * affected processor models on the command line, hence |
| 2061 | * the need to ignore the workaround. |
| 2062 | */ |
| 2063 | break; |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 2064 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
| 2065 | if (kvm_hv_msr_partition_wide(msr)) { |
| 2066 | int r; |
| 2067 | mutex_lock(&vcpu->kvm->lock); |
| 2068 | r = set_msr_hyperv_pw(vcpu, msr, data); |
| 2069 | mutex_unlock(&vcpu->kvm->lock); |
| 2070 | return r; |
| 2071 | } else |
| 2072 | return set_msr_hyperv(vcpu, msr, data); |
| 2073 | break; |
john cooper | 91c9c3e | 2011-01-21 00:21:00 -0500 | [diff] [blame] | 2074 | case MSR_IA32_BBL_CR_CTL3: |
| 2075 | /* Drop writes to this legacy MSR -- see rdmsr |
| 2076 | * counterpart for further detail. |
| 2077 | */ |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 2078 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data); |
john cooper | 91c9c3e | 2011-01-21 00:21:00 -0500 | [diff] [blame] | 2079 | break; |
Boris Ostrovsky | 2b036c6 | 2012-01-09 14:00:35 -0500 | [diff] [blame] | 2080 | case MSR_AMD64_OSVW_ID_LENGTH: |
| 2081 | if (!guest_cpuid_has_osvw(vcpu)) |
| 2082 | return 1; |
| 2083 | vcpu->arch.osvw.length = data; |
| 2084 | break; |
| 2085 | case MSR_AMD64_OSVW_STATUS: |
| 2086 | if (!guest_cpuid_has_osvw(vcpu)) |
| 2087 | return 1; |
| 2088 | vcpu->arch.osvw.status = data; |
| 2089 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2090 | default: |
Ed Swierk | ffde22a | 2009-10-15 15:21:43 -0700 | [diff] [blame] | 2091 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
| 2092 | return xen_hvm_config(vcpu, data); |
Gleb Natapov | f5132b0 | 2011-11-10 14:57:22 +0200 | [diff] [blame] | 2093 | if (kvm_pmu_msr(vcpu, msr)) |
| 2094 | return kvm_pmu_set_msr(vcpu, msr, data); |
Andre Przywara | ed85c06 | 2009-06-25 12:36:49 +0200 | [diff] [blame] | 2095 | if (!ignore_msrs) { |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 2096 | vcpu_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", |
| 2097 | msr, data); |
Andre Przywara | ed85c06 | 2009-06-25 12:36:49 +0200 | [diff] [blame] | 2098 | return 1; |
| 2099 | } else { |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 2100 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", |
| 2101 | msr, data); |
Andre Przywara | ed85c06 | 2009-06-25 12:36:49 +0200 | [diff] [blame] | 2102 | break; |
| 2103 | } |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2104 | } |
| 2105 | return 0; |
| 2106 | } |
| 2107 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); |
| 2108 | |
| 2109 | |
| 2110 | /* |
| 2111 | * Reads an msr value (of 'msr_index') into 'pdata'. |
| 2112 | * Returns 0 on success, non-0 otherwise. |
| 2113 | * Assumes vcpu_load() was already called. |
| 2114 | */ |
| 2115 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
| 2116 | { |
| 2117 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); |
| 2118 | } |
| 2119 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 2120 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
| 2121 | { |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 2122 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
| 2123 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 2124 | if (!msr_mtrr_valid(msr)) |
| 2125 | return 1; |
| 2126 | |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 2127 | if (msr == MSR_MTRRdefType) |
| 2128 | *pdata = vcpu->arch.mtrr_state.def_type + |
| 2129 | (vcpu->arch.mtrr_state.enabled << 10); |
| 2130 | else if (msr == MSR_MTRRfix64K_00000) |
| 2131 | *pdata = p[0]; |
| 2132 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) |
| 2133 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; |
| 2134 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) |
| 2135 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; |
| 2136 | else if (msr == MSR_IA32_CR_PAT) |
| 2137 | *pdata = vcpu->arch.pat; |
| 2138 | else { /* Variable MTRRs */ |
| 2139 | int idx, is_mtrr_mask; |
| 2140 | u64 *pt; |
| 2141 | |
| 2142 | idx = (msr - 0x200) / 2; |
| 2143 | is_mtrr_mask = msr - 0x200 - 2 * idx; |
| 2144 | if (!is_mtrr_mask) |
| 2145 | pt = |
| 2146 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; |
| 2147 | else |
| 2148 | pt = |
| 2149 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; |
| 2150 | *pdata = *pt; |
| 2151 | } |
| 2152 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 2153 | return 0; |
| 2154 | } |
| 2155 | |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 2156 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
| 2157 | { |
| 2158 | u64 data; |
| 2159 | u64 mcg_cap = vcpu->arch.mcg_cap; |
| 2160 | unsigned bank_num = mcg_cap & 0xff; |
| 2161 | |
| 2162 | switch (msr) { |
| 2163 | case MSR_IA32_P5_MC_ADDR: |
| 2164 | case MSR_IA32_P5_MC_TYPE: |
| 2165 | data = 0; |
| 2166 | break; |
| 2167 | case MSR_IA32_MCG_CAP: |
| 2168 | data = vcpu->arch.mcg_cap; |
| 2169 | break; |
| 2170 | case MSR_IA32_MCG_CTL: |
| 2171 | if (!(mcg_cap & MCG_CTL_P)) |
| 2172 | return 1; |
| 2173 | data = vcpu->arch.mcg_ctl; |
| 2174 | break; |
| 2175 | case MSR_IA32_MCG_STATUS: |
| 2176 | data = vcpu->arch.mcg_status; |
| 2177 | break; |
| 2178 | default: |
| 2179 | if (msr >= MSR_IA32_MC0_CTL && |
| 2180 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { |
| 2181 | u32 offset = msr - MSR_IA32_MC0_CTL; |
| 2182 | data = vcpu->arch.mce_banks[offset]; |
| 2183 | break; |
| 2184 | } |
| 2185 | return 1; |
| 2186 | } |
| 2187 | *pdata = data; |
| 2188 | return 0; |
| 2189 | } |
| 2190 | |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 2191 | static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
| 2192 | { |
| 2193 | u64 data = 0; |
| 2194 | struct kvm *kvm = vcpu->kvm; |
| 2195 | |
| 2196 | switch (msr) { |
| 2197 | case HV_X64_MSR_GUEST_OS_ID: |
| 2198 | data = kvm->arch.hv_guest_os_id; |
| 2199 | break; |
| 2200 | case HV_X64_MSR_HYPERCALL: |
| 2201 | data = kvm->arch.hv_hypercall; |
| 2202 | break; |
| 2203 | default: |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 2204 | vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 2205 | return 1; |
| 2206 | } |
| 2207 | |
| 2208 | *pdata = data; |
| 2209 | return 0; |
| 2210 | } |
| 2211 | |
| 2212 | static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
| 2213 | { |
| 2214 | u64 data = 0; |
| 2215 | |
| 2216 | switch (msr) { |
| 2217 | case HV_X64_MSR_VP_INDEX: { |
| 2218 | int r; |
| 2219 | struct kvm_vcpu *v; |
| 2220 | kvm_for_each_vcpu(r, v, vcpu->kvm) |
| 2221 | if (v == vcpu) |
| 2222 | data = r; |
| 2223 | break; |
| 2224 | } |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 2225 | case HV_X64_MSR_EOI: |
| 2226 | return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata); |
| 2227 | case HV_X64_MSR_ICR: |
| 2228 | return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata); |
| 2229 | case HV_X64_MSR_TPR: |
| 2230 | return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata); |
Mike Waychison | 14fa67e | 2011-07-21 15:38:10 -0700 | [diff] [blame] | 2231 | case HV_X64_MSR_APIC_ASSIST_PAGE: |
Mike Waychison | d1613ad | 2011-07-23 00:31:45 -0700 | [diff] [blame] | 2232 | data = vcpu->arch.hv_vapic; |
| 2233 | break; |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 2234 | default: |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 2235 | vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 2236 | return 1; |
| 2237 | } |
| 2238 | *pdata = data; |
| 2239 | return 0; |
| 2240 | } |
| 2241 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2242 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
| 2243 | { |
| 2244 | u64 data; |
| 2245 | |
| 2246 | switch (msr) { |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2247 | case MSR_IA32_PLATFORM_ID: |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2248 | case MSR_IA32_EBL_CR_POWERON: |
Alexander Graf | b5e2fec | 2008-07-22 08:00:45 +0200 | [diff] [blame] | 2249 | case MSR_IA32_DEBUGCTLMSR: |
| 2250 | case MSR_IA32_LASTBRANCHFROMIP: |
| 2251 | case MSR_IA32_LASTBRANCHTOIP: |
| 2252 | case MSR_IA32_LASTINTFROMIP: |
| 2253 | case MSR_IA32_LASTINTTOIP: |
Jaswinder Singh Rajput | 60af2ec | 2009-05-14 11:00:10 +0530 | [diff] [blame] | 2254 | case MSR_K8_SYSCFG: |
| 2255 | case MSR_K7_HWCR: |
Avi Kivity | 61a6bd6 | 2008-12-29 17:32:28 +0200 | [diff] [blame] | 2256 | case MSR_VM_HSAVE_PA: |
Amit Shah | 9e69962 | 2009-06-15 13:25:34 +0530 | [diff] [blame] | 2257 | case MSR_K7_EVNTSEL0: |
Amit Shah | 1f3ee61 | 2009-06-30 16:24:28 +0530 | [diff] [blame] | 2258 | case MSR_K7_PERFCTR0: |
Andre Przywara | 1fdbd48 | 2009-06-24 12:44:34 +0200 | [diff] [blame] | 2259 | case MSR_K8_INT_PENDING_MSG: |
Andre Przywara | c323c0e | 2009-06-24 15:37:05 +0200 | [diff] [blame] | 2260 | case MSR_AMD64_NB_CFG: |
Andre Przywara | f7c6d14 | 2009-07-02 15:04:14 +0200 | [diff] [blame] | 2261 | case MSR_FAM10H_MMIO_CONF_BASE: |
Borislav Petkov | 2e32b71 | 2013-02-19 19:33:13 +0100 | [diff] [blame] | 2262 | case MSR_AMD64_BU_CFG2: |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2263 | data = 0; |
| 2264 | break; |
Gleb Natapov | 5753785 | 2012-01-15 14:17:22 +0200 | [diff] [blame] | 2265 | case MSR_P6_PERFCTR0: |
| 2266 | case MSR_P6_PERFCTR1: |
| 2267 | case MSR_P6_EVNTSEL0: |
| 2268 | case MSR_P6_EVNTSEL1: |
| 2269 | if (kvm_pmu_msr(vcpu, msr)) |
| 2270 | return kvm_pmu_get_msr(vcpu, msr, pdata); |
| 2271 | data = 0; |
| 2272 | break; |
Marcelo Tosatti | 742bc67 | 2011-07-29 19:44:21 -0300 | [diff] [blame] | 2273 | case MSR_IA32_UCODE_REV: |
| 2274 | data = 0x100000000ULL; |
| 2275 | break; |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 2276 | case MSR_MTRRcap: |
| 2277 | data = 0x500 | KVM_NR_VAR_MTRR; |
| 2278 | break; |
| 2279 | case 0x200 ... 0x2ff: |
| 2280 | return get_msr_mtrr(vcpu, msr, pdata); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2281 | case 0xcd: /* fsb frequency */ |
| 2282 | data = 3; |
| 2283 | break; |
Jes Sorensen | 7b91409 | 2010-09-09 12:06:46 +0200 | [diff] [blame] | 2284 | /* |
| 2285 | * MSR_EBC_FREQUENCY_ID |
| 2286 | * Conservative value valid for even the basic CPU models. |
| 2287 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of |
| 2288 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, |
| 2289 | * and 266MHz for model 3, or 4. Set Core Clock |
| 2290 | * Frequency to System Bus Frequency Ratio to 1 (bits |
| 2291 | * 31:24) even though these are only valid for CPU |
| 2292 | * models > 2, however guests may end up dividing or |
| 2293 | * multiplying by zero otherwise. |
| 2294 | */ |
| 2295 | case MSR_EBC_FREQUENCY_ID: |
| 2296 | data = 1 << 24; |
| 2297 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2298 | case MSR_IA32_APICBASE: |
| 2299 | data = kvm_get_apic_base(vcpu); |
| 2300 | break; |
Gleb Natapov | 0105d1a | 2009-07-05 17:39:36 +0300 | [diff] [blame] | 2301 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
| 2302 | return kvm_x2apic_msr_read(vcpu, msr, pdata); |
| 2303 | break; |
Liu, Jinsong | a3e06bb | 2011-09-22 16:55:52 +0800 | [diff] [blame] | 2304 | case MSR_IA32_TSCDEADLINE: |
| 2305 | data = kvm_get_lapic_tscdeadline_msr(vcpu); |
| 2306 | break; |
Will Auld | ba90463 | 2012-11-29 12:42:50 -0800 | [diff] [blame] | 2307 | case MSR_IA32_TSC_ADJUST: |
| 2308 | data = (u64)vcpu->arch.ia32_tsc_adjust_msr; |
| 2309 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2310 | case MSR_IA32_MISC_ENABLE: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2311 | data = vcpu->arch.ia32_misc_enable_msr; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2312 | break; |
Alexander Graf | 847f0ad | 2008-02-21 12:11:01 +0100 | [diff] [blame] | 2313 | case MSR_IA32_PERF_STATUS: |
| 2314 | /* TSC increment by tick */ |
| 2315 | data = 1000ULL; |
| 2316 | /* CPU multiplier */ |
| 2317 | data |= (((uint64_t)4ULL) << 40); |
| 2318 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2319 | case MSR_EFER: |
Avi Kivity | f6801df | 2010-01-21 15:31:50 +0200 | [diff] [blame] | 2320 | data = vcpu->arch.efer; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2321 | break; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 2322 | case MSR_KVM_WALL_CLOCK: |
Glauber Costa | 11c6bff | 2010-05-11 12:17:41 -0400 | [diff] [blame] | 2323 | case MSR_KVM_WALL_CLOCK_NEW: |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 2324 | data = vcpu->kvm->arch.wall_clock; |
| 2325 | break; |
| 2326 | case MSR_KVM_SYSTEM_TIME: |
Glauber Costa | 11c6bff | 2010-05-11 12:17:41 -0400 | [diff] [blame] | 2327 | case MSR_KVM_SYSTEM_TIME_NEW: |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 2328 | data = vcpu->arch.time; |
| 2329 | break; |
Gleb Natapov | 344d958 | 2010-10-14 11:22:50 +0200 | [diff] [blame] | 2330 | case MSR_KVM_ASYNC_PF_EN: |
| 2331 | data = vcpu->arch.apf.msr_val; |
| 2332 | break; |
Glauber Costa | c9aaa89 | 2011-07-11 15:28:14 -0400 | [diff] [blame] | 2333 | case MSR_KVM_STEAL_TIME: |
| 2334 | data = vcpu->arch.st.msr_val; |
| 2335 | break; |
Michael S. Tsirkin | 1d92128 | 2012-08-26 18:00:29 +0300 | [diff] [blame] | 2336 | case MSR_KVM_PV_EOI_EN: |
| 2337 | data = vcpu->arch.pv_eoi.msr_val; |
| 2338 | break; |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 2339 | case MSR_IA32_P5_MC_ADDR: |
| 2340 | case MSR_IA32_P5_MC_TYPE: |
| 2341 | case MSR_IA32_MCG_CAP: |
| 2342 | case MSR_IA32_MCG_CTL: |
| 2343 | case MSR_IA32_MCG_STATUS: |
| 2344 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: |
| 2345 | return get_msr_mce(vcpu, msr, pdata); |
Jes Sorensen | 84e0cef | 2010-09-01 11:42:04 +0200 | [diff] [blame] | 2346 | case MSR_K7_CLK_CTL: |
| 2347 | /* |
| 2348 | * Provide expected ramp-up count for K7. All other |
| 2349 | * are set to zero, indicating minimum divisors for |
| 2350 | * every field. |
| 2351 | * |
| 2352 | * This prevents guest kernels on AMD host with CPU |
| 2353 | * type 6, model 8 and higher from exploding due to |
| 2354 | * the rdmsr failing. |
| 2355 | */ |
| 2356 | data = 0x20000000; |
| 2357 | break; |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 2358 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
| 2359 | if (kvm_hv_msr_partition_wide(msr)) { |
| 2360 | int r; |
| 2361 | mutex_lock(&vcpu->kvm->lock); |
| 2362 | r = get_msr_hyperv_pw(vcpu, msr, pdata); |
| 2363 | mutex_unlock(&vcpu->kvm->lock); |
| 2364 | return r; |
| 2365 | } else |
| 2366 | return get_msr_hyperv(vcpu, msr, pdata); |
| 2367 | break; |
john cooper | 91c9c3e | 2011-01-21 00:21:00 -0500 | [diff] [blame] | 2368 | case MSR_IA32_BBL_CR_CTL3: |
| 2369 | /* This legacy MSR exists but isn't fully documented in current |
| 2370 | * silicon. It is however accessed by winxp in very narrow |
| 2371 | * scenarios where it sets bit #19, itself documented as |
| 2372 | * a "reserved" bit. Best effort attempt to source coherent |
| 2373 | * read data here should the balance of the register be |
| 2374 | * interpreted by the guest: |
| 2375 | * |
| 2376 | * L2 cache control register 3: 64GB range, 256KB size, |
| 2377 | * enabled, latency 0x1, configured |
| 2378 | */ |
| 2379 | data = 0xbe702111; |
| 2380 | break; |
Boris Ostrovsky | 2b036c6 | 2012-01-09 14:00:35 -0500 | [diff] [blame] | 2381 | case MSR_AMD64_OSVW_ID_LENGTH: |
| 2382 | if (!guest_cpuid_has_osvw(vcpu)) |
| 2383 | return 1; |
| 2384 | data = vcpu->arch.osvw.length; |
| 2385 | break; |
| 2386 | case MSR_AMD64_OSVW_STATUS: |
| 2387 | if (!guest_cpuid_has_osvw(vcpu)) |
| 2388 | return 1; |
| 2389 | data = vcpu->arch.osvw.status; |
| 2390 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2391 | default: |
Gleb Natapov | f5132b0 | 2011-11-10 14:57:22 +0200 | [diff] [blame] | 2392 | if (kvm_pmu_msr(vcpu, msr)) |
| 2393 | return kvm_pmu_get_msr(vcpu, msr, pdata); |
Andre Przywara | ed85c06 | 2009-06-25 12:36:49 +0200 | [diff] [blame] | 2394 | if (!ignore_msrs) { |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 2395 | vcpu_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); |
Andre Przywara | ed85c06 | 2009-06-25 12:36:49 +0200 | [diff] [blame] | 2396 | return 1; |
| 2397 | } else { |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 2398 | vcpu_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); |
Andre Przywara | ed85c06 | 2009-06-25 12:36:49 +0200 | [diff] [blame] | 2399 | data = 0; |
| 2400 | } |
| 2401 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 2402 | } |
| 2403 | *pdata = data; |
| 2404 | return 0; |
| 2405 | } |
| 2406 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); |
| 2407 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2408 | /* |
| 2409 | * Read or write a bunch of msrs. All parameters are kernel addresses. |
| 2410 | * |
| 2411 | * @return number of msrs set successfully. |
| 2412 | */ |
| 2413 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
| 2414 | struct kvm_msr_entry *entries, |
| 2415 | int (*do_msr)(struct kvm_vcpu *vcpu, |
| 2416 | unsigned index, u64 *data)) |
| 2417 | { |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 2418 | int i, idx; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2419 | |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 2420 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2421 | for (i = 0; i < msrs->nmsrs; ++i) |
| 2422 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) |
| 2423 | break; |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 2424 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2425 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2426 | return i; |
| 2427 | } |
| 2428 | |
| 2429 | /* |
| 2430 | * Read or write a bunch of msrs. Parameters are user addresses. |
| 2431 | * |
| 2432 | * @return number of msrs set successfully. |
| 2433 | */ |
| 2434 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
| 2435 | int (*do_msr)(struct kvm_vcpu *vcpu, |
| 2436 | unsigned index, u64 *data), |
| 2437 | int writeback) |
| 2438 | { |
| 2439 | struct kvm_msrs msrs; |
| 2440 | struct kvm_msr_entry *entries; |
| 2441 | int r, n; |
| 2442 | unsigned size; |
| 2443 | |
| 2444 | r = -EFAULT; |
| 2445 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) |
| 2446 | goto out; |
| 2447 | |
| 2448 | r = -E2BIG; |
| 2449 | if (msrs.nmsrs >= MAX_IO_MSRS) |
| 2450 | goto out; |
| 2451 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2452 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2453 | entries = memdup_user(user_msrs->entries, size); |
| 2454 | if (IS_ERR(entries)) { |
| 2455 | r = PTR_ERR(entries); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2456 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2457 | } |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2458 | |
| 2459 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
| 2460 | if (r < 0) |
| 2461 | goto out_free; |
| 2462 | |
| 2463 | r = -EFAULT; |
| 2464 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) |
| 2465 | goto out_free; |
| 2466 | |
| 2467 | r = n; |
| 2468 | |
| 2469 | out_free: |
Avi Kivity | 7a73c02 | 2010-07-22 23:24:52 +0300 | [diff] [blame] | 2470 | kfree(entries); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2471 | out: |
| 2472 | return r; |
| 2473 | } |
| 2474 | |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 2475 | int kvm_dev_ioctl_check_extension(long ext) |
| 2476 | { |
| 2477 | int r; |
| 2478 | |
| 2479 | switch (ext) { |
| 2480 | case KVM_CAP_IRQCHIP: |
| 2481 | case KVM_CAP_HLT: |
| 2482 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 2483 | case KVM_CAP_SET_TSS_ADDR: |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 2484 | case KVM_CAP_EXT_CPUID: |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 2485 | case KVM_CAP_CLOCKSOURCE: |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 2486 | case KVM_CAP_PIT: |
Marcelo Tosatti | a28e4f5 | 2008-02-22 12:21:36 -0500 | [diff] [blame] | 2487 | case KVM_CAP_NOP_IO_DELAY: |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 2488 | case KVM_CAP_MP_STATE: |
Avi Kivity | ed84862 | 2008-07-29 11:30:57 +0300 | [diff] [blame] | 2489 | case KVM_CAP_SYNC_MMU: |
Lai Jiangshan | a355c85 | 2010-12-14 17:57:47 +0800 | [diff] [blame] | 2490 | case KVM_CAP_USER_NMI: |
Marcelo Tosatti | 52d939a | 2008-12-30 15:55:06 -0200 | [diff] [blame] | 2491 | case KVM_CAP_REINJECT_CONTROL: |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 2492 | case KVM_CAP_IRQ_INJECT_STATUS: |
Sheng Yang | e56d532 | 2009-03-12 21:45:39 +0800 | [diff] [blame] | 2493 | case KVM_CAP_ASSIGN_DEV_IRQ: |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2494 | case KVM_CAP_IRQFD: |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 2495 | case KVM_CAP_IOEVENTFD: |
Jan Kiszka | c5ff41c | 2009-05-14 22:42:53 +0200 | [diff] [blame] | 2496 | case KVM_CAP_PIT2: |
Beth Kon | e9f4275 | 2009-07-07 11:50:38 -0400 | [diff] [blame] | 2497 | case KVM_CAP_PIT_STATE2: |
Sheng Yang | b927a3c | 2009-07-21 10:42:48 +0800 | [diff] [blame] | 2498 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
Ed Swierk | ffde22a | 2009-10-15 15:21:43 -0700 | [diff] [blame] | 2499 | case KVM_CAP_XEN_HVM: |
Glauber Costa | afbcf7a | 2009-10-16 15:28:36 -0400 | [diff] [blame] | 2500 | case KVM_CAP_ADJUST_CLOCK: |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2501 | case KVM_CAP_VCPU_EVENTS: |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 2502 | case KVM_CAP_HYPERV: |
Gleb Natapov | 10388a0 | 2010-01-17 15:51:23 +0200 | [diff] [blame] | 2503 | case KVM_CAP_HYPERV_VAPIC: |
Gleb Natapov | c25bc16 | 2010-01-17 15:51:24 +0200 | [diff] [blame] | 2504 | case KVM_CAP_HYPERV_SPIN: |
Zhai, Edwin | ab9f4ec | 2010-01-29 14:38:44 +0800 | [diff] [blame] | 2505 | case KVM_CAP_PCI_SEGMENT: |
Jan Kiszka | a1efbe7 | 2010-02-15 10:45:43 +0100 | [diff] [blame] | 2506 | case KVM_CAP_DEBUGREGS: |
Jan Kiszka | d2be165 | 2010-02-23 17:47:57 +0100 | [diff] [blame] | 2507 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 2508 | case KVM_CAP_XSAVE: |
Gleb Natapov | 344d958 | 2010-10-14 11:22:50 +0200 | [diff] [blame] | 2509 | case KVM_CAP_ASYNC_PF: |
Joerg Roedel | 92a1f12 | 2011-03-25 09:44:51 +0100 | [diff] [blame] | 2510 | case KVM_CAP_GET_TSC_KHZ: |
Jan Kiszka | 07700a9 | 2012-02-28 14:19:54 +0100 | [diff] [blame] | 2511 | case KVM_CAP_PCI_2_3: |
Eric B Munson | 1c0b28c | 2012-03-10 14:37:27 -0500 | [diff] [blame] | 2512 | case KVM_CAP_KVMCLOCK_CTRL: |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 2513 | case KVM_CAP_READONLY_MEM: |
Alex Williamson | 7a84428 | 2012-09-21 11:58:03 -0600 | [diff] [blame] | 2514 | case KVM_CAP_IRQFD_RESAMPLE: |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 2515 | r = 1; |
| 2516 | break; |
Laurent Vivier | 542472b | 2008-05-30 16:05:55 +0200 | [diff] [blame] | 2517 | case KVM_CAP_COALESCED_MMIO: |
| 2518 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; |
| 2519 | break; |
Avi Kivity | 774ead3 | 2007-12-26 13:57:04 +0200 | [diff] [blame] | 2520 | case KVM_CAP_VAPIC: |
| 2521 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); |
| 2522 | break; |
Avi Kivity | f725230 | 2008-02-20 11:53:16 +0200 | [diff] [blame] | 2523 | case KVM_CAP_NR_VCPUS: |
Sasha Levin | 8c3ba33 | 2011-07-18 17:17:15 +0300 | [diff] [blame] | 2524 | r = KVM_SOFT_MAX_VCPUS; |
| 2525 | break; |
| 2526 | case KVM_CAP_MAX_VCPUS: |
Avi Kivity | f725230 | 2008-02-20 11:53:16 +0200 | [diff] [blame] | 2527 | r = KVM_MAX_VCPUS; |
| 2528 | break; |
Avi Kivity | a988b91 | 2008-02-20 11:59:20 +0200 | [diff] [blame] | 2529 | case KVM_CAP_NR_MEMSLOTS: |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 2530 | r = KVM_USER_MEM_SLOTS; |
Avi Kivity | a988b91 | 2008-02-20 11:59:20 +0200 | [diff] [blame] | 2531 | break; |
Marcelo Tosatti | a68a6a7 | 2009-10-01 19:28:39 -0300 | [diff] [blame] | 2532 | case KVM_CAP_PV_MMU: /* obsolete */ |
| 2533 | r = 0; |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 2534 | break; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 2535 | case KVM_CAP_IOMMU: |
Joerg Roedel | a1b60c1 | 2011-09-06 18:46:34 +0200 | [diff] [blame] | 2536 | r = iommu_present(&pci_bus_type); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 2537 | break; |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 2538 | case KVM_CAP_MCE: |
| 2539 | r = KVM_MAX_MCE_BANKS; |
| 2540 | break; |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 2541 | case KVM_CAP_XCRS: |
| 2542 | r = cpu_has_xsave; |
| 2543 | break; |
Joerg Roedel | 92a1f12 | 2011-03-25 09:44:51 +0100 | [diff] [blame] | 2544 | case KVM_CAP_TSC_CONTROL: |
| 2545 | r = kvm_has_tsc_control; |
| 2546 | break; |
Jan Kiszka | 4d25a066 | 2011-12-21 12:28:29 +0100 | [diff] [blame] | 2547 | case KVM_CAP_TSC_DEADLINE_TIMER: |
| 2548 | r = boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER); |
| 2549 | break; |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 2550 | default: |
| 2551 | r = 0; |
| 2552 | break; |
| 2553 | } |
| 2554 | return r; |
| 2555 | |
| 2556 | } |
| 2557 | |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2558 | long kvm_arch_dev_ioctl(struct file *filp, |
| 2559 | unsigned int ioctl, unsigned long arg) |
| 2560 | { |
| 2561 | void __user *argp = (void __user *)arg; |
| 2562 | long r; |
| 2563 | |
| 2564 | switch (ioctl) { |
| 2565 | case KVM_GET_MSR_INDEX_LIST: { |
| 2566 | struct kvm_msr_list __user *user_msr_list = argp; |
| 2567 | struct kvm_msr_list msr_list; |
| 2568 | unsigned n; |
| 2569 | |
| 2570 | r = -EFAULT; |
| 2571 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) |
| 2572 | goto out; |
| 2573 | n = msr_list.nmsrs; |
| 2574 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
| 2575 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
| 2576 | goto out; |
| 2577 | r = -E2BIG; |
Jan Kiszka | e125e7b | 2009-07-02 21:45:47 +0200 | [diff] [blame] | 2578 | if (n < msr_list.nmsrs) |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2579 | goto out; |
| 2580 | r = -EFAULT; |
| 2581 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, |
| 2582 | num_msrs_to_save * sizeof(u32))) |
| 2583 | goto out; |
Jan Kiszka | e125e7b | 2009-07-02 21:45:47 +0200 | [diff] [blame] | 2584 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2585 | &emulated_msrs, |
| 2586 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) |
| 2587 | goto out; |
| 2588 | r = 0; |
| 2589 | break; |
| 2590 | } |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 2591 | case KVM_GET_SUPPORTED_CPUID: { |
| 2592 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
| 2593 | struct kvm_cpuid2 cpuid; |
| 2594 | |
| 2595 | r = -EFAULT; |
| 2596 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 2597 | goto out; |
| 2598 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 2599 | cpuid_arg->entries); |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 2600 | if (r) |
| 2601 | goto out; |
| 2602 | |
| 2603 | r = -EFAULT; |
| 2604 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) |
| 2605 | goto out; |
| 2606 | r = 0; |
| 2607 | break; |
| 2608 | } |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 2609 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
| 2610 | u64 mce_cap; |
| 2611 | |
| 2612 | mce_cap = KVM_MCE_CAP_SUPPORTED; |
| 2613 | r = -EFAULT; |
| 2614 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) |
| 2615 | goto out; |
| 2616 | r = 0; |
| 2617 | break; |
| 2618 | } |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2619 | default: |
| 2620 | r = -EINVAL; |
| 2621 | } |
| 2622 | out: |
| 2623 | return r; |
| 2624 | } |
| 2625 | |
Sheng Yang | f5f48ee | 2010-06-30 12:25:15 +0800 | [diff] [blame] | 2626 | static void wbinvd_ipi(void *garbage) |
| 2627 | { |
| 2628 | wbinvd(); |
| 2629 | } |
| 2630 | |
| 2631 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) |
| 2632 | { |
| 2633 | return vcpu->kvm->arch.iommu_domain && |
| 2634 | !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY); |
| 2635 | } |
| 2636 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2637 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| 2638 | { |
Sheng Yang | f5f48ee | 2010-06-30 12:25:15 +0800 | [diff] [blame] | 2639 | /* Address WBINVD may be executed by guest */ |
| 2640 | if (need_emulate_wbinvd(vcpu)) { |
| 2641 | if (kvm_x86_ops->has_wbinvd_exit()) |
| 2642 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); |
| 2643 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) |
| 2644 | smp_call_function_single(vcpu->cpu, |
| 2645 | wbinvd_ipi, NULL, 1); |
| 2646 | } |
| 2647 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2648 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
Zachary Amsden | 0dd6a6e | 2012-02-03 15:43:56 -0200 | [diff] [blame] | 2649 | |
| 2650 | /* Apply any externally detected TSC adjustments (due to suspend) */ |
| 2651 | if (unlikely(vcpu->arch.tsc_offset_adjustment)) { |
| 2652 | adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); |
| 2653 | vcpu->arch.tsc_offset_adjustment = 0; |
| 2654 | set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); |
| 2655 | } |
| 2656 | |
Zachary Amsden | 48434c20 | 2010-08-19 22:07:24 -1000 | [diff] [blame] | 2657 | if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) { |
Zachary Amsden | 6f526ec | 2012-02-03 15:43:54 -0200 | [diff] [blame] | 2658 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : |
| 2659 | native_read_tsc() - vcpu->arch.last_host_tsc; |
Zachary Amsden | e48672f | 2010-08-19 22:07:23 -1000 | [diff] [blame] | 2660 | if (tsc_delta < 0) |
| 2661 | mark_tsc_unstable("KVM discovered backwards TSC"); |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 2662 | if (check_tsc_unstable()) { |
Zachary Amsden | b183aa5 | 2012-02-03 15:43:53 -0200 | [diff] [blame] | 2663 | u64 offset = kvm_x86_ops->compute_tsc_offset(vcpu, |
| 2664 | vcpu->arch.last_guest_tsc); |
| 2665 | kvm_x86_ops->write_tsc_offset(vcpu, offset); |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 2666 | vcpu->arch.tsc_catchup = 1; |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 2667 | } |
Marcelo Tosatti | d98d07c | 2012-11-27 23:29:04 -0200 | [diff] [blame] | 2668 | /* |
| 2669 | * On a host with synchronized TSC, there is no need to update |
| 2670 | * kvmclock on vcpu->cpu migration |
| 2671 | */ |
| 2672 | if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) |
| 2673 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 2674 | if (vcpu->cpu != cpu) |
| 2675 | kvm_migrate_timers(vcpu); |
Zachary Amsden | e48672f | 2010-08-19 22:07:23 -1000 | [diff] [blame] | 2676 | vcpu->cpu = cpu; |
Zachary Amsden | 6b7d7e7 | 2009-10-09 16:26:08 -1000 | [diff] [blame] | 2677 | } |
Glauber Costa | c9aaa89 | 2011-07-11 15:28:14 -0400 | [diff] [blame] | 2678 | |
| 2679 | accumulate_steal_time(vcpu); |
| 2680 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2681 | } |
| 2682 | |
| 2683 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| 2684 | { |
Avi Kivity | 02daab2 | 2009-12-30 12:40:26 +0200 | [diff] [blame] | 2685 | kvm_x86_ops->vcpu_put(vcpu); |
Avi Kivity | 1c11e71 | 2010-05-03 16:05:44 +0300 | [diff] [blame] | 2686 | kvm_put_guest_fpu(vcpu); |
Zachary Amsden | 6f526ec | 2012-02-03 15:43:54 -0200 | [diff] [blame] | 2687 | vcpu->arch.last_host_tsc = native_read_tsc(); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2688 | } |
| 2689 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2690 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
| 2691 | struct kvm_lapic_state *s) |
| 2692 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2693 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2694 | |
| 2695 | return 0; |
| 2696 | } |
| 2697 | |
| 2698 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, |
| 2699 | struct kvm_lapic_state *s) |
| 2700 | { |
Gleb Natapov | 64eb062 | 2012-08-08 15:24:36 +0300 | [diff] [blame] | 2701 | kvm_apic_post_state_restore(vcpu, s); |
Gleb Natapov | cb142eb | 2009-08-09 15:17:40 +0300 | [diff] [blame] | 2702 | update_cr8_intercept(vcpu); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2703 | |
| 2704 | return 0; |
| 2705 | } |
| 2706 | |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 2707 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
| 2708 | struct kvm_interrupt *irq) |
| 2709 | { |
Chen Gang | 02cdb50 | 2013-02-27 11:33:25 +0800 | [diff] [blame] | 2710 | if (irq->irq >= KVM_NR_INTERRUPTS) |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 2711 | return -EINVAL; |
| 2712 | if (irqchip_in_kernel(vcpu->kvm)) |
| 2713 | return -ENXIO; |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 2714 | |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 2715 | kvm_queue_interrupt(vcpu, irq->irq, false); |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 2716 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 2717 | |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 2718 | return 0; |
| 2719 | } |
| 2720 | |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 2721 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
| 2722 | { |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 2723 | kvm_inject_nmi(vcpu); |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 2724 | |
| 2725 | return 0; |
| 2726 | } |
| 2727 | |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 2728 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
| 2729 | struct kvm_tpr_access_ctl *tac) |
| 2730 | { |
| 2731 | if (tac->flags) |
| 2732 | return -EINVAL; |
| 2733 | vcpu->arch.tpr_access_reporting = !!tac->enabled; |
| 2734 | return 0; |
| 2735 | } |
| 2736 | |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 2737 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
| 2738 | u64 mcg_cap) |
| 2739 | { |
| 2740 | int r; |
| 2741 | unsigned bank_num = mcg_cap & 0xff, bank; |
| 2742 | |
| 2743 | r = -EINVAL; |
Jan Kiszka | a9e38c3e | 2009-10-23 09:37:00 +0200 | [diff] [blame] | 2744 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 2745 | goto out; |
| 2746 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) |
| 2747 | goto out; |
| 2748 | r = 0; |
| 2749 | vcpu->arch.mcg_cap = mcg_cap; |
| 2750 | /* Init IA32_MCG_CTL to all 1s */ |
| 2751 | if (mcg_cap & MCG_CTL_P) |
| 2752 | vcpu->arch.mcg_ctl = ~(u64)0; |
| 2753 | /* Init IA32_MCi_CTL to all 1s */ |
| 2754 | for (bank = 0; bank < bank_num; bank++) |
| 2755 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; |
| 2756 | out: |
| 2757 | return r; |
| 2758 | } |
| 2759 | |
| 2760 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, |
| 2761 | struct kvm_x86_mce *mce) |
| 2762 | { |
| 2763 | u64 mcg_cap = vcpu->arch.mcg_cap; |
| 2764 | unsigned bank_num = mcg_cap & 0xff; |
| 2765 | u64 *banks = vcpu->arch.mce_banks; |
| 2766 | |
| 2767 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) |
| 2768 | return -EINVAL; |
| 2769 | /* |
| 2770 | * if IA32_MCG_CTL is not all 1s, the uncorrected error |
| 2771 | * reporting is disabled |
| 2772 | */ |
| 2773 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && |
| 2774 | vcpu->arch.mcg_ctl != ~(u64)0) |
| 2775 | return 0; |
| 2776 | banks += 4 * mce->bank; |
| 2777 | /* |
| 2778 | * if IA32_MCi_CTL is not all 1s, the uncorrected error |
| 2779 | * reporting is disabled for the bank |
| 2780 | */ |
| 2781 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) |
| 2782 | return 0; |
| 2783 | if (mce->status & MCI_STATUS_UC) { |
| 2784 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || |
Avi Kivity | fc78f51 | 2009-12-07 12:16:48 +0200 | [diff] [blame] | 2785 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 2786 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 2787 | return 0; |
| 2788 | } |
| 2789 | if (banks[1] & MCI_STATUS_VAL) |
| 2790 | mce->status |= MCI_STATUS_OVER; |
| 2791 | banks[2] = mce->addr; |
| 2792 | banks[3] = mce->misc; |
| 2793 | vcpu->arch.mcg_status = mce->mcg_status; |
| 2794 | banks[1] = mce->status; |
| 2795 | kvm_queue_exception(vcpu, MC_VECTOR); |
| 2796 | } else if (!(banks[1] & MCI_STATUS_VAL) |
| 2797 | || !(banks[1] & MCI_STATUS_UC)) { |
| 2798 | if (banks[1] & MCI_STATUS_VAL) |
| 2799 | mce->status |= MCI_STATUS_OVER; |
| 2800 | banks[2] = mce->addr; |
| 2801 | banks[3] = mce->misc; |
| 2802 | banks[1] = mce->status; |
| 2803 | } else |
| 2804 | banks[1] |= MCI_STATUS_OVER; |
| 2805 | return 0; |
| 2806 | } |
| 2807 | |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2808 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
| 2809 | struct kvm_vcpu_events *events) |
| 2810 | { |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 2811 | process_nmi(vcpu); |
Jan Kiszka | 03b82a3 | 2010-02-15 10:45:41 +0100 | [diff] [blame] | 2812 | events->exception.injected = |
| 2813 | vcpu->arch.exception.pending && |
| 2814 | !kvm_exception_is_soft(vcpu->arch.exception.nr); |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2815 | events->exception.nr = vcpu->arch.exception.nr; |
| 2816 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; |
Vasiliy Kulikov | 97e69aa | 2010-10-30 22:54:47 +0400 | [diff] [blame] | 2817 | events->exception.pad = 0; |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2818 | events->exception.error_code = vcpu->arch.exception.error_code; |
| 2819 | |
Jan Kiszka | 03b82a3 | 2010-02-15 10:45:41 +0100 | [diff] [blame] | 2820 | events->interrupt.injected = |
| 2821 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2822 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
Jan Kiszka | 03b82a3 | 2010-02-15 10:45:41 +0100 | [diff] [blame] | 2823 | events->interrupt.soft = 0; |
Jan Kiszka | 48005f6 | 2010-02-19 19:38:07 +0100 | [diff] [blame] | 2824 | events->interrupt.shadow = |
| 2825 | kvm_x86_ops->get_interrupt_shadow(vcpu, |
| 2826 | KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI); |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2827 | |
| 2828 | events->nmi.injected = vcpu->arch.nmi_injected; |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 2829 | events->nmi.pending = vcpu->arch.nmi_pending != 0; |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2830 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); |
Vasiliy Kulikov | 97e69aa | 2010-10-30 22:54:47 +0400 | [diff] [blame] | 2831 | events->nmi.pad = 0; |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2832 | |
| 2833 | events->sipi_vector = vcpu->arch.sipi_vector; |
| 2834 | |
Jan Kiszka | dab4b91 | 2009-12-06 18:24:15 +0100 | [diff] [blame] | 2835 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
Jan Kiszka | 48005f6 | 2010-02-19 19:38:07 +0100 | [diff] [blame] | 2836 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
| 2837 | | KVM_VCPUEVENT_VALID_SHADOW); |
Vasiliy Kulikov | 97e69aa | 2010-10-30 22:54:47 +0400 | [diff] [blame] | 2838 | memset(&events->reserved, 0, sizeof(events->reserved)); |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2839 | } |
| 2840 | |
| 2841 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, |
| 2842 | struct kvm_vcpu_events *events) |
| 2843 | { |
Jan Kiszka | dab4b91 | 2009-12-06 18:24:15 +0100 | [diff] [blame] | 2844 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
Jan Kiszka | 48005f6 | 2010-02-19 19:38:07 +0100 | [diff] [blame] | 2845 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
| 2846 | | KVM_VCPUEVENT_VALID_SHADOW)) |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2847 | return -EINVAL; |
| 2848 | |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 2849 | process_nmi(vcpu); |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2850 | vcpu->arch.exception.pending = events->exception.injected; |
| 2851 | vcpu->arch.exception.nr = events->exception.nr; |
| 2852 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; |
| 2853 | vcpu->arch.exception.error_code = events->exception.error_code; |
| 2854 | |
| 2855 | vcpu->arch.interrupt.pending = events->interrupt.injected; |
| 2856 | vcpu->arch.interrupt.nr = events->interrupt.nr; |
| 2857 | vcpu->arch.interrupt.soft = events->interrupt.soft; |
Jan Kiszka | 48005f6 | 2010-02-19 19:38:07 +0100 | [diff] [blame] | 2858 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
| 2859 | kvm_x86_ops->set_interrupt_shadow(vcpu, |
| 2860 | events->interrupt.shadow); |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2861 | |
| 2862 | vcpu->arch.nmi_injected = events->nmi.injected; |
Jan Kiszka | dab4b91 | 2009-12-06 18:24:15 +0100 | [diff] [blame] | 2863 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
| 2864 | vcpu->arch.nmi_pending = events->nmi.pending; |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2865 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
| 2866 | |
Jan Kiszka | dab4b91 | 2009-12-06 18:24:15 +0100 | [diff] [blame] | 2867 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR) |
| 2868 | vcpu->arch.sipi_vector = events->sipi_vector; |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2869 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 2870 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
| 2871 | |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 2872 | return 0; |
| 2873 | } |
| 2874 | |
Jan Kiszka | a1efbe7 | 2010-02-15 10:45:43 +0100 | [diff] [blame] | 2875 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
| 2876 | struct kvm_debugregs *dbgregs) |
| 2877 | { |
Jan Kiszka | a1efbe7 | 2010-02-15 10:45:43 +0100 | [diff] [blame] | 2878 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
| 2879 | dbgregs->dr6 = vcpu->arch.dr6; |
| 2880 | dbgregs->dr7 = vcpu->arch.dr7; |
| 2881 | dbgregs->flags = 0; |
Vasiliy Kulikov | 97e69aa | 2010-10-30 22:54:47 +0400 | [diff] [blame] | 2882 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
Jan Kiszka | a1efbe7 | 2010-02-15 10:45:43 +0100 | [diff] [blame] | 2883 | } |
| 2884 | |
| 2885 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, |
| 2886 | struct kvm_debugregs *dbgregs) |
| 2887 | { |
| 2888 | if (dbgregs->flags) |
| 2889 | return -EINVAL; |
| 2890 | |
Jan Kiszka | a1efbe7 | 2010-02-15 10:45:43 +0100 | [diff] [blame] | 2891 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
| 2892 | vcpu->arch.dr6 = dbgregs->dr6; |
| 2893 | vcpu->arch.dr7 = dbgregs->dr7; |
| 2894 | |
Jan Kiszka | a1efbe7 | 2010-02-15 10:45:43 +0100 | [diff] [blame] | 2895 | return 0; |
| 2896 | } |
| 2897 | |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 2898 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
| 2899 | struct kvm_xsave *guest_xsave) |
| 2900 | { |
| 2901 | if (cpu_has_xsave) |
| 2902 | memcpy(guest_xsave->region, |
| 2903 | &vcpu->arch.guest_fpu.state->xsave, |
Xiaotian Feng | f45755b | 2010-08-13 15:19:11 +0800 | [diff] [blame] | 2904 | xstate_size); |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 2905 | else { |
| 2906 | memcpy(guest_xsave->region, |
| 2907 | &vcpu->arch.guest_fpu.state->fxsave, |
| 2908 | sizeof(struct i387_fxsave_struct)); |
| 2909 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = |
| 2910 | XSTATE_FPSSE; |
| 2911 | } |
| 2912 | } |
| 2913 | |
| 2914 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, |
| 2915 | struct kvm_xsave *guest_xsave) |
| 2916 | { |
| 2917 | u64 xstate_bv = |
| 2918 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; |
| 2919 | |
| 2920 | if (cpu_has_xsave) |
| 2921 | memcpy(&vcpu->arch.guest_fpu.state->xsave, |
Xiaotian Feng | f45755b | 2010-08-13 15:19:11 +0800 | [diff] [blame] | 2922 | guest_xsave->region, xstate_size); |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 2923 | else { |
| 2924 | if (xstate_bv & ~XSTATE_FPSSE) |
| 2925 | return -EINVAL; |
| 2926 | memcpy(&vcpu->arch.guest_fpu.state->fxsave, |
| 2927 | guest_xsave->region, sizeof(struct i387_fxsave_struct)); |
| 2928 | } |
| 2929 | return 0; |
| 2930 | } |
| 2931 | |
| 2932 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, |
| 2933 | struct kvm_xcrs *guest_xcrs) |
| 2934 | { |
| 2935 | if (!cpu_has_xsave) { |
| 2936 | guest_xcrs->nr_xcrs = 0; |
| 2937 | return; |
| 2938 | } |
| 2939 | |
| 2940 | guest_xcrs->nr_xcrs = 1; |
| 2941 | guest_xcrs->flags = 0; |
| 2942 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; |
| 2943 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; |
| 2944 | } |
| 2945 | |
| 2946 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, |
| 2947 | struct kvm_xcrs *guest_xcrs) |
| 2948 | { |
| 2949 | int i, r = 0; |
| 2950 | |
| 2951 | if (!cpu_has_xsave) |
| 2952 | return -EINVAL; |
| 2953 | |
| 2954 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) |
| 2955 | return -EINVAL; |
| 2956 | |
| 2957 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) |
| 2958 | /* Only support XCR0 currently */ |
| 2959 | if (guest_xcrs->xcrs[0].xcr == XCR_XFEATURE_ENABLED_MASK) { |
| 2960 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, |
| 2961 | guest_xcrs->xcrs[0].value); |
| 2962 | break; |
| 2963 | } |
| 2964 | if (r) |
| 2965 | r = -EINVAL; |
| 2966 | return r; |
| 2967 | } |
| 2968 | |
Eric B Munson | 1c0b28c | 2012-03-10 14:37:27 -0500 | [diff] [blame] | 2969 | /* |
| 2970 | * kvm_set_guest_paused() indicates to the guest kernel that it has been |
| 2971 | * stopped by the hypervisor. This function will be called from the host only. |
| 2972 | * EINVAL is returned when the host attempts to set the flag for a guest that |
| 2973 | * does not support pv clocks. |
| 2974 | */ |
| 2975 | static int kvm_set_guest_paused(struct kvm_vcpu *vcpu) |
| 2976 | { |
Eric B Munson | 1c0b28c | 2012-03-10 14:37:27 -0500 | [diff] [blame] | 2977 | if (!vcpu->arch.time_page) |
| 2978 | return -EINVAL; |
Marcelo Tosatti | 51d59c6 | 2012-08-03 15:57:49 -0300 | [diff] [blame] | 2979 | vcpu->arch.pvclock_set_guest_stopped_request = true; |
Eric B Munson | 1c0b28c | 2012-03-10 14:37:27 -0500 | [diff] [blame] | 2980 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
| 2981 | return 0; |
| 2982 | } |
| 2983 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2984 | long kvm_arch_vcpu_ioctl(struct file *filp, |
| 2985 | unsigned int ioctl, unsigned long arg) |
| 2986 | { |
| 2987 | struct kvm_vcpu *vcpu = filp->private_data; |
| 2988 | void __user *argp = (void __user *)arg; |
| 2989 | int r; |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 2990 | union { |
| 2991 | struct kvm_lapic_state *lapic; |
| 2992 | struct kvm_xsave *xsave; |
| 2993 | struct kvm_xcrs *xcrs; |
| 2994 | void *buffer; |
| 2995 | } u; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2996 | |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 2997 | u.buffer = NULL; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2998 | switch (ioctl) { |
| 2999 | case KVM_GET_LAPIC: { |
Marcelo Tosatti | 2204ae3 | 2009-10-29 13:44:16 -0200 | [diff] [blame] | 3000 | r = -EINVAL; |
| 3001 | if (!vcpu->arch.apic) |
| 3002 | goto out; |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3003 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 3004 | |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 3005 | r = -ENOMEM; |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3006 | if (!u.lapic) |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 3007 | goto out; |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3008 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 3009 | if (r) |
| 3010 | goto out; |
| 3011 | r = -EFAULT; |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3012 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 3013 | goto out; |
| 3014 | r = 0; |
| 3015 | break; |
| 3016 | } |
| 3017 | case KVM_SET_LAPIC: { |
Marcelo Tosatti | 2204ae3 | 2009-10-29 13:44:16 -0200 | [diff] [blame] | 3018 | r = -EINVAL; |
| 3019 | if (!vcpu->arch.apic) |
| 3020 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 3021 | u.lapic = memdup_user(argp, sizeof(*u.lapic)); |
Guo Chao | 1859541 | 2012-11-02 18:33:21 +0800 | [diff] [blame] | 3022 | if (IS_ERR(u.lapic)) |
| 3023 | return PTR_ERR(u.lapic); |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 3024 | |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3025 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 3026 | break; |
| 3027 | } |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 3028 | case KVM_INTERRUPT: { |
| 3029 | struct kvm_interrupt irq; |
| 3030 | |
| 3031 | r = -EFAULT; |
| 3032 | if (copy_from_user(&irq, argp, sizeof irq)) |
| 3033 | goto out; |
| 3034 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 3035 | break; |
| 3036 | } |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 3037 | case KVM_NMI: { |
| 3038 | r = kvm_vcpu_ioctl_nmi(vcpu); |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 3039 | break; |
| 3040 | } |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 3041 | case KVM_SET_CPUID: { |
| 3042 | struct kvm_cpuid __user *cpuid_arg = argp; |
| 3043 | struct kvm_cpuid cpuid; |
| 3044 | |
| 3045 | r = -EFAULT; |
| 3046 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 3047 | goto out; |
| 3048 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 3049 | break; |
| 3050 | } |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3051 | case KVM_SET_CPUID2: { |
| 3052 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
| 3053 | struct kvm_cpuid2 cpuid; |
| 3054 | |
| 3055 | r = -EFAULT; |
| 3056 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 3057 | goto out; |
| 3058 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 3059 | cpuid_arg->entries); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3060 | break; |
| 3061 | } |
| 3062 | case KVM_GET_CPUID2: { |
| 3063 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
| 3064 | struct kvm_cpuid2 cpuid; |
| 3065 | |
| 3066 | r = -EFAULT; |
| 3067 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 3068 | goto out; |
| 3069 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 3070 | cpuid_arg->entries); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3071 | if (r) |
| 3072 | goto out; |
| 3073 | r = -EFAULT; |
| 3074 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) |
| 3075 | goto out; |
| 3076 | r = 0; |
| 3077 | break; |
| 3078 | } |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 3079 | case KVM_GET_MSRS: |
| 3080 | r = msr_io(vcpu, argp, kvm_get_msr, 1); |
| 3081 | break; |
| 3082 | case KVM_SET_MSRS: |
| 3083 | r = msr_io(vcpu, argp, do_set_msr, 0); |
| 3084 | break; |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 3085 | case KVM_TPR_ACCESS_REPORTING: { |
| 3086 | struct kvm_tpr_access_ctl tac; |
| 3087 | |
| 3088 | r = -EFAULT; |
| 3089 | if (copy_from_user(&tac, argp, sizeof tac)) |
| 3090 | goto out; |
| 3091 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); |
| 3092 | if (r) |
| 3093 | goto out; |
| 3094 | r = -EFAULT; |
| 3095 | if (copy_to_user(argp, &tac, sizeof tac)) |
| 3096 | goto out; |
| 3097 | r = 0; |
| 3098 | break; |
| 3099 | }; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3100 | case KVM_SET_VAPIC_ADDR: { |
| 3101 | struct kvm_vapic_addr va; |
| 3102 | |
| 3103 | r = -EINVAL; |
| 3104 | if (!irqchip_in_kernel(vcpu->kvm)) |
| 3105 | goto out; |
| 3106 | r = -EFAULT; |
| 3107 | if (copy_from_user(&va, argp, sizeof va)) |
| 3108 | goto out; |
| 3109 | r = 0; |
| 3110 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
| 3111 | break; |
| 3112 | } |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 3113 | case KVM_X86_SETUP_MCE: { |
| 3114 | u64 mcg_cap; |
| 3115 | |
| 3116 | r = -EFAULT; |
| 3117 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) |
| 3118 | goto out; |
| 3119 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); |
| 3120 | break; |
| 3121 | } |
| 3122 | case KVM_X86_SET_MCE: { |
| 3123 | struct kvm_x86_mce mce; |
| 3124 | |
| 3125 | r = -EFAULT; |
| 3126 | if (copy_from_user(&mce, argp, sizeof mce)) |
| 3127 | goto out; |
| 3128 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); |
| 3129 | break; |
| 3130 | } |
Jan Kiszka | 3cfc309 | 2009-11-12 01:04:25 +0100 | [diff] [blame] | 3131 | case KVM_GET_VCPU_EVENTS: { |
| 3132 | struct kvm_vcpu_events events; |
| 3133 | |
| 3134 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); |
| 3135 | |
| 3136 | r = -EFAULT; |
| 3137 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) |
| 3138 | break; |
| 3139 | r = 0; |
| 3140 | break; |
| 3141 | } |
| 3142 | case KVM_SET_VCPU_EVENTS: { |
| 3143 | struct kvm_vcpu_events events; |
| 3144 | |
| 3145 | r = -EFAULT; |
| 3146 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) |
| 3147 | break; |
| 3148 | |
| 3149 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); |
| 3150 | break; |
| 3151 | } |
Jan Kiszka | a1efbe7 | 2010-02-15 10:45:43 +0100 | [diff] [blame] | 3152 | case KVM_GET_DEBUGREGS: { |
| 3153 | struct kvm_debugregs dbgregs; |
| 3154 | |
| 3155 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); |
| 3156 | |
| 3157 | r = -EFAULT; |
| 3158 | if (copy_to_user(argp, &dbgregs, |
| 3159 | sizeof(struct kvm_debugregs))) |
| 3160 | break; |
| 3161 | r = 0; |
| 3162 | break; |
| 3163 | } |
| 3164 | case KVM_SET_DEBUGREGS: { |
| 3165 | struct kvm_debugregs dbgregs; |
| 3166 | |
| 3167 | r = -EFAULT; |
| 3168 | if (copy_from_user(&dbgregs, argp, |
| 3169 | sizeof(struct kvm_debugregs))) |
| 3170 | break; |
| 3171 | |
| 3172 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); |
| 3173 | break; |
| 3174 | } |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3175 | case KVM_GET_XSAVE: { |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3176 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3177 | r = -ENOMEM; |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3178 | if (!u.xsave) |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3179 | break; |
| 3180 | |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3181 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3182 | |
| 3183 | r = -EFAULT; |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3184 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3185 | break; |
| 3186 | r = 0; |
| 3187 | break; |
| 3188 | } |
| 3189 | case KVM_SET_XSAVE: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 3190 | u.xsave = memdup_user(argp, sizeof(*u.xsave)); |
Guo Chao | 1859541 | 2012-11-02 18:33:21 +0800 | [diff] [blame] | 3191 | if (IS_ERR(u.xsave)) |
| 3192 | return PTR_ERR(u.xsave); |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3193 | |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3194 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3195 | break; |
| 3196 | } |
| 3197 | case KVM_GET_XCRS: { |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3198 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3199 | r = -ENOMEM; |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3200 | if (!u.xcrs) |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3201 | break; |
| 3202 | |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3203 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3204 | |
| 3205 | r = -EFAULT; |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3206 | if (copy_to_user(argp, u.xcrs, |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3207 | sizeof(struct kvm_xcrs))) |
| 3208 | break; |
| 3209 | r = 0; |
| 3210 | break; |
| 3211 | } |
| 3212 | case KVM_SET_XCRS: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 3213 | u.xcrs = memdup_user(argp, sizeof(*u.xcrs)); |
Guo Chao | 1859541 | 2012-11-02 18:33:21 +0800 | [diff] [blame] | 3214 | if (IS_ERR(u.xcrs)) |
| 3215 | return PTR_ERR(u.xcrs); |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3216 | |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3217 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
Sheng Yang | 2d5b5a6 | 2010-06-13 17:29:39 +0800 | [diff] [blame] | 3218 | break; |
| 3219 | } |
Joerg Roedel | 92a1f12 | 2011-03-25 09:44:51 +0100 | [diff] [blame] | 3220 | case KVM_SET_TSC_KHZ: { |
| 3221 | u32 user_tsc_khz; |
| 3222 | |
| 3223 | r = -EINVAL; |
Joerg Roedel | 92a1f12 | 2011-03-25 09:44:51 +0100 | [diff] [blame] | 3224 | user_tsc_khz = (u32)arg; |
| 3225 | |
| 3226 | if (user_tsc_khz >= kvm_max_guest_tsc_khz) |
| 3227 | goto out; |
| 3228 | |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 3229 | if (user_tsc_khz == 0) |
| 3230 | user_tsc_khz = tsc_khz; |
| 3231 | |
| 3232 | kvm_set_tsc_khz(vcpu, user_tsc_khz); |
Joerg Roedel | 92a1f12 | 2011-03-25 09:44:51 +0100 | [diff] [blame] | 3233 | |
| 3234 | r = 0; |
| 3235 | goto out; |
| 3236 | } |
| 3237 | case KVM_GET_TSC_KHZ: { |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 3238 | r = vcpu->arch.virtual_tsc_khz; |
Joerg Roedel | 92a1f12 | 2011-03-25 09:44:51 +0100 | [diff] [blame] | 3239 | goto out; |
| 3240 | } |
Eric B Munson | 1c0b28c | 2012-03-10 14:37:27 -0500 | [diff] [blame] | 3241 | case KVM_KVMCLOCK_CTRL: { |
| 3242 | r = kvm_set_guest_paused(vcpu); |
| 3243 | goto out; |
| 3244 | } |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 3245 | default: |
| 3246 | r = -EINVAL; |
| 3247 | } |
| 3248 | out: |
Avi Kivity | d1ac91d | 2010-06-20 15:54:43 +0300 | [diff] [blame] | 3249 | kfree(u.buffer); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 3250 | return r; |
| 3251 | } |
| 3252 | |
Carsten Otte | 5b1c149 | 2012-01-04 10:25:23 +0100 | [diff] [blame] | 3253 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
| 3254 | { |
| 3255 | return VM_FAULT_SIGBUS; |
| 3256 | } |
| 3257 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3258 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
| 3259 | { |
| 3260 | int ret; |
| 3261 | |
| 3262 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) |
Guo Chao | 951179c | 2012-11-02 18:33:22 +0800 | [diff] [blame] | 3263 | return -EINVAL; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3264 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
| 3265 | return ret; |
| 3266 | } |
| 3267 | |
Sheng Yang | b927a3c | 2009-07-21 10:42:48 +0800 | [diff] [blame] | 3268 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
| 3269 | u64 ident_addr) |
| 3270 | { |
| 3271 | kvm->arch.ept_identity_map_addr = ident_addr; |
| 3272 | return 0; |
| 3273 | } |
| 3274 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3275 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
| 3276 | u32 kvm_nr_mmu_pages) |
| 3277 | { |
| 3278 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) |
| 3279 | return -EINVAL; |
| 3280 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 3281 | mutex_lock(&kvm->slots_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3282 | |
| 3283 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); |
Zhang Xiantao | f05e70a | 2007-12-14 10:01:48 +0800 | [diff] [blame] | 3284 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3285 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 3286 | mutex_unlock(&kvm->slots_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3287 | return 0; |
| 3288 | } |
| 3289 | |
| 3290 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) |
| 3291 | { |
Dave Hansen | 39de71e | 2010-08-19 18:11:14 -0700 | [diff] [blame] | 3292 | return kvm->arch.n_max_mmu_pages; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3293 | } |
| 3294 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3295 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
| 3296 | { |
| 3297 | int r; |
| 3298 | |
| 3299 | r = 0; |
| 3300 | switch (chip->chip_id) { |
| 3301 | case KVM_IRQCHIP_PIC_MASTER: |
| 3302 | memcpy(&chip->chip.pic, |
| 3303 | &pic_irqchip(kvm)->pics[0], |
| 3304 | sizeof(struct kvm_pic_state)); |
| 3305 | break; |
| 3306 | case KVM_IRQCHIP_PIC_SLAVE: |
| 3307 | memcpy(&chip->chip.pic, |
| 3308 | &pic_irqchip(kvm)->pics[1], |
| 3309 | sizeof(struct kvm_pic_state)); |
| 3310 | break; |
| 3311 | case KVM_IRQCHIP_IOAPIC: |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 3312 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3313 | break; |
| 3314 | default: |
| 3315 | r = -EINVAL; |
| 3316 | break; |
| 3317 | } |
| 3318 | return r; |
| 3319 | } |
| 3320 | |
| 3321 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
| 3322 | { |
| 3323 | int r; |
| 3324 | |
| 3325 | r = 0; |
| 3326 | switch (chip->chip_id) { |
| 3327 | case KVM_IRQCHIP_PIC_MASTER: |
Avi Kivity | f4f5105 | 2010-09-19 18:44:07 +0200 | [diff] [blame] | 3328 | spin_lock(&pic_irqchip(kvm)->lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3329 | memcpy(&pic_irqchip(kvm)->pics[0], |
| 3330 | &chip->chip.pic, |
| 3331 | sizeof(struct kvm_pic_state)); |
Avi Kivity | f4f5105 | 2010-09-19 18:44:07 +0200 | [diff] [blame] | 3332 | spin_unlock(&pic_irqchip(kvm)->lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3333 | break; |
| 3334 | case KVM_IRQCHIP_PIC_SLAVE: |
Avi Kivity | f4f5105 | 2010-09-19 18:44:07 +0200 | [diff] [blame] | 3335 | spin_lock(&pic_irqchip(kvm)->lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3336 | memcpy(&pic_irqchip(kvm)->pics[1], |
| 3337 | &chip->chip.pic, |
| 3338 | sizeof(struct kvm_pic_state)); |
Avi Kivity | f4f5105 | 2010-09-19 18:44:07 +0200 | [diff] [blame] | 3339 | spin_unlock(&pic_irqchip(kvm)->lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3340 | break; |
| 3341 | case KVM_IRQCHIP_IOAPIC: |
Gleb Natapov | eba0226 | 2009-08-24 11:54:25 +0300 | [diff] [blame] | 3342 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3343 | break; |
| 3344 | default: |
| 3345 | r = -EINVAL; |
| 3346 | break; |
| 3347 | } |
| 3348 | kvm_pic_update_irq(pic_irqchip(kvm)); |
| 3349 | return r; |
| 3350 | } |
| 3351 | |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3352 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
| 3353 | { |
| 3354 | int r = 0; |
| 3355 | |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 3356 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3357 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 3358 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3359 | return r; |
| 3360 | } |
| 3361 | |
| 3362 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
| 3363 | { |
| 3364 | int r = 0; |
| 3365 | |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 3366 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3367 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
Beth Kon | e9f4275 | 2009-07-07 11:50:38 -0400 | [diff] [blame] | 3368 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
| 3369 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
| 3370 | return r; |
| 3371 | } |
| 3372 | |
| 3373 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) |
| 3374 | { |
| 3375 | int r = 0; |
| 3376 | |
| 3377 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
| 3378 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, |
| 3379 | sizeof(ps->channels)); |
| 3380 | ps->flags = kvm->arch.vpit->pit_state.flags; |
| 3381 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
Vasiliy Kulikov | 97e69aa | 2010-10-30 22:54:47 +0400 | [diff] [blame] | 3382 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
Beth Kon | e9f4275 | 2009-07-07 11:50:38 -0400 | [diff] [blame] | 3383 | return r; |
| 3384 | } |
| 3385 | |
| 3386 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) |
| 3387 | { |
| 3388 | int r = 0, start = 0; |
| 3389 | u32 prev_legacy, cur_legacy; |
| 3390 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
| 3391 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; |
| 3392 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; |
| 3393 | if (!prev_legacy && cur_legacy) |
| 3394 | start = 1; |
| 3395 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, |
| 3396 | sizeof(kvm->arch.vpit->pit_state.channels)); |
| 3397 | kvm->arch.vpit->pit_state.flags = ps->flags; |
| 3398 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 3399 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3400 | return r; |
| 3401 | } |
| 3402 | |
Marcelo Tosatti | 52d939a | 2008-12-30 15:55:06 -0200 | [diff] [blame] | 3403 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
| 3404 | struct kvm_reinject_control *control) |
| 3405 | { |
| 3406 | if (!kvm->arch.vpit) |
| 3407 | return -ENXIO; |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 3408 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
Avi Kivity | 26ef192 | 2012-07-26 18:01:53 +0300 | [diff] [blame] | 3409 | kvm->arch.vpit->pit_state.reinject = control->pit_reinject; |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 3410 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
Marcelo Tosatti | 52d939a | 2008-12-30 15:55:06 -0200 | [diff] [blame] | 3411 | return 0; |
| 3412 | } |
| 3413 | |
Takuya Yoshikawa | 95d4c16 | 2011-11-14 18:24:50 +0900 | [diff] [blame] | 3414 | /** |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3415 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot |
| 3416 | * @kvm: kvm instance |
| 3417 | * @log: slot id and address to which we copy the log |
Takuya Yoshikawa | 95d4c16 | 2011-11-14 18:24:50 +0900 | [diff] [blame] | 3418 | * |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3419 | * We need to keep it in mind that VCPU threads can write to the bitmap |
| 3420 | * concurrently. So, to avoid losing data, we keep the following order for |
| 3421 | * each bit: |
Takuya Yoshikawa | 95d4c16 | 2011-11-14 18:24:50 +0900 | [diff] [blame] | 3422 | * |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3423 | * 1. Take a snapshot of the bit and clear it if needed. |
| 3424 | * 2. Write protect the corresponding page. |
| 3425 | * 3. Flush TLB's if needed. |
| 3426 | * 4. Copy the snapshot to the userspace. |
Takuya Yoshikawa | 95d4c16 | 2011-11-14 18:24:50 +0900 | [diff] [blame] | 3427 | * |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3428 | * Between 2 and 3, the guest may write to the page using the remaining TLB |
| 3429 | * entry. This is not a problem because the page will be reported dirty at |
| 3430 | * step 4 using the snapshot taken before and step 3 ensures that successive |
| 3431 | * writes will be logged for the next call. |
Takuya Yoshikawa | 95d4c16 | 2011-11-14 18:24:50 +0900 | [diff] [blame] | 3432 | */ |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3433 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 3434 | { |
Takuya Yoshikawa | 7850ac5 | 2011-11-14 18:23:34 +0900 | [diff] [blame] | 3435 | int r; |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 3436 | struct kvm_memory_slot *memslot; |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3437 | unsigned long n, i; |
| 3438 | unsigned long *dirty_bitmap; |
| 3439 | unsigned long *dirty_bitmap_buffer; |
| 3440 | bool is_dirty = false; |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 3441 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 3442 | mutex_lock(&kvm->slots_lock); |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 3443 | |
Marcelo Tosatti | b050b01 | 2009-12-23 14:35:22 -0200 | [diff] [blame] | 3444 | r = -EINVAL; |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 3445 | if (log->slot >= KVM_USER_MEM_SLOTS) |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 3446 | goto out; |
| 3447 | |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 3448 | memslot = id_to_memslot(kvm->memslots, log->slot); |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3449 | |
| 3450 | dirty_bitmap = memslot->dirty_bitmap; |
Marcelo Tosatti | b050b01 | 2009-12-23 14:35:22 -0200 | [diff] [blame] | 3451 | r = -ENOENT; |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3452 | if (!dirty_bitmap) |
Marcelo Tosatti | b050b01 | 2009-12-23 14:35:22 -0200 | [diff] [blame] | 3453 | goto out; |
| 3454 | |
Takuya Yoshikawa | 87bf6e7 | 2010-04-12 19:35:35 +0900 | [diff] [blame] | 3455 | n = kvm_dirty_bitmap_bytes(memslot); |
Marcelo Tosatti | b050b01 | 2009-12-23 14:35:22 -0200 | [diff] [blame] | 3456 | |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3457 | dirty_bitmap_buffer = dirty_bitmap + n / sizeof(long); |
| 3458 | memset(dirty_bitmap_buffer, 0, n); |
Marcelo Tosatti | b050b01 | 2009-12-23 14:35:22 -0200 | [diff] [blame] | 3459 | |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3460 | spin_lock(&kvm->mmu_lock); |
Marcelo Tosatti | b050b01 | 2009-12-23 14:35:22 -0200 | [diff] [blame] | 3461 | |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3462 | for (i = 0; i < n / sizeof(long); i++) { |
| 3463 | unsigned long mask; |
| 3464 | gfn_t offset; |
Sasha Levin | cdfca7b | 2011-12-04 19:36:28 +0200 | [diff] [blame] | 3465 | |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3466 | if (!dirty_bitmap[i]) |
| 3467 | continue; |
Marcelo Tosatti | b050b01 | 2009-12-23 14:35:22 -0200 | [diff] [blame] | 3468 | |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3469 | is_dirty = true; |
Takuya Yoshikawa | 914ebcc | 2010-04-28 18:50:36 +0900 | [diff] [blame] | 3470 | |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3471 | mask = xchg(&dirty_bitmap[i], 0); |
| 3472 | dirty_bitmap_buffer[i] = mask; |
Michael S. Tsirkin | edde99c | 2010-10-25 03:21:24 +0200 | [diff] [blame] | 3473 | |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3474 | offset = i * BITS_PER_LONG; |
| 3475 | kvm_mmu_write_protect_pt_masked(kvm, memslot, offset, mask); |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 3476 | } |
Takuya Yoshikawa | 60c3461 | 2012-03-03 14:21:48 +0900 | [diff] [blame] | 3477 | if (is_dirty) |
| 3478 | kvm_flush_remote_tlbs(kvm); |
| 3479 | |
| 3480 | spin_unlock(&kvm->mmu_lock); |
| 3481 | |
| 3482 | r = -EFAULT; |
| 3483 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap_buffer, n)) |
| 3484 | goto out; |
Marcelo Tosatti | b050b01 | 2009-12-23 14:35:22 -0200 | [diff] [blame] | 3485 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 3486 | r = 0; |
| 3487 | out: |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 3488 | mutex_unlock(&kvm->slots_lock); |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 3489 | return r; |
| 3490 | } |
| 3491 | |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 3492 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event) |
| 3493 | { |
| 3494 | if (!irqchip_in_kernel(kvm)) |
| 3495 | return -ENXIO; |
| 3496 | |
| 3497 | irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
| 3498 | irq_event->irq, irq_event->level); |
| 3499 | return 0; |
| 3500 | } |
| 3501 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3502 | long kvm_arch_vm_ioctl(struct file *filp, |
| 3503 | unsigned int ioctl, unsigned long arg) |
| 3504 | { |
| 3505 | struct kvm *kvm = filp->private_data; |
| 3506 | void __user *argp = (void __user *)arg; |
Avi Kivity | 367e131 | 2009-08-26 14:57:07 +0300 | [diff] [blame] | 3507 | int r = -ENOTTY; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 3508 | /* |
| 3509 | * This union makes it completely explicit to gcc-3.x |
| 3510 | * that these two variables' stack usage should be |
| 3511 | * combined, not added together. |
| 3512 | */ |
| 3513 | union { |
| 3514 | struct kvm_pit_state ps; |
Beth Kon | e9f4275 | 2009-07-07 11:50:38 -0400 | [diff] [blame] | 3515 | struct kvm_pit_state2 ps2; |
Jan Kiszka | c5ff41c | 2009-05-14 22:42:53 +0200 | [diff] [blame] | 3516 | struct kvm_pit_config pit_config; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 3517 | } u; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3518 | |
| 3519 | switch (ioctl) { |
| 3520 | case KVM_SET_TSS_ADDR: |
| 3521 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3522 | break; |
Sheng Yang | b927a3c | 2009-07-21 10:42:48 +0800 | [diff] [blame] | 3523 | case KVM_SET_IDENTITY_MAP_ADDR: { |
| 3524 | u64 ident_addr; |
| 3525 | |
| 3526 | r = -EFAULT; |
| 3527 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) |
| 3528 | goto out; |
| 3529 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); |
Sheng Yang | b927a3c | 2009-07-21 10:42:48 +0800 | [diff] [blame] | 3530 | break; |
| 3531 | } |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3532 | case KVM_SET_NR_MMU_PAGES: |
| 3533 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3534 | break; |
| 3535 | case KVM_GET_NR_MMU_PAGES: |
| 3536 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); |
| 3537 | break; |
Marcelo Tosatti | 3ddea12 | 2009-10-29 13:44:15 -0200 | [diff] [blame] | 3538 | case KVM_CREATE_IRQCHIP: { |
| 3539 | struct kvm_pic *vpic; |
| 3540 | |
| 3541 | mutex_lock(&kvm->lock); |
| 3542 | r = -EEXIST; |
| 3543 | if (kvm->arch.vpic) |
| 3544 | goto create_irqchip_unlock; |
Avi Kivity | 3e51570 | 2012-03-05 14:23:29 +0200 | [diff] [blame] | 3545 | r = -EINVAL; |
| 3546 | if (atomic_read(&kvm->online_vcpus)) |
| 3547 | goto create_irqchip_unlock; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3548 | r = -ENOMEM; |
Marcelo Tosatti | 3ddea12 | 2009-10-29 13:44:15 -0200 | [diff] [blame] | 3549 | vpic = kvm_create_pic(kvm); |
| 3550 | if (vpic) { |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3551 | r = kvm_ioapic_init(kvm); |
| 3552 | if (r) { |
Takuya Yoshikawa | 175504c | 2010-12-16 01:41:37 +0900 | [diff] [blame] | 3553 | mutex_lock(&kvm->slots_lock); |
Wei Yongjun | 72bb2fc | 2010-02-09 10:33:03 +0800 | [diff] [blame] | 3554 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3555 | &vpic->dev_master); |
| 3556 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
| 3557 | &vpic->dev_slave); |
| 3558 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
| 3559 | &vpic->dev_eclr); |
Takuya Yoshikawa | 175504c | 2010-12-16 01:41:37 +0900 | [diff] [blame] | 3560 | mutex_unlock(&kvm->slots_lock); |
Marcelo Tosatti | 3ddea12 | 2009-10-29 13:44:15 -0200 | [diff] [blame] | 3561 | kfree(vpic); |
| 3562 | goto create_irqchip_unlock; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3563 | } |
| 3564 | } else |
Marcelo Tosatti | 3ddea12 | 2009-10-29 13:44:15 -0200 | [diff] [blame] | 3565 | goto create_irqchip_unlock; |
| 3566 | smp_wmb(); |
| 3567 | kvm->arch.vpic = vpic; |
| 3568 | smp_wmb(); |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 3569 | r = kvm_setup_default_irq_routing(kvm); |
| 3570 | if (r) { |
Takuya Yoshikawa | 175504c | 2010-12-16 01:41:37 +0900 | [diff] [blame] | 3571 | mutex_lock(&kvm->slots_lock); |
Marcelo Tosatti | 3ddea12 | 2009-10-29 13:44:15 -0200 | [diff] [blame] | 3572 | mutex_lock(&kvm->irq_lock); |
Wei Yongjun | 72bb2fc | 2010-02-09 10:33:03 +0800 | [diff] [blame] | 3573 | kvm_ioapic_destroy(kvm); |
| 3574 | kvm_destroy_pic(kvm); |
Marcelo Tosatti | 3ddea12 | 2009-10-29 13:44:15 -0200 | [diff] [blame] | 3575 | mutex_unlock(&kvm->irq_lock); |
Takuya Yoshikawa | 175504c | 2010-12-16 01:41:37 +0900 | [diff] [blame] | 3576 | mutex_unlock(&kvm->slots_lock); |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 3577 | } |
Marcelo Tosatti | 3ddea12 | 2009-10-29 13:44:15 -0200 | [diff] [blame] | 3578 | create_irqchip_unlock: |
| 3579 | mutex_unlock(&kvm->lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3580 | break; |
Marcelo Tosatti | 3ddea12 | 2009-10-29 13:44:15 -0200 | [diff] [blame] | 3581 | } |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 3582 | case KVM_CREATE_PIT: |
Jan Kiszka | c5ff41c | 2009-05-14 22:42:53 +0200 | [diff] [blame] | 3583 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
| 3584 | goto create_pit; |
| 3585 | case KVM_CREATE_PIT2: |
| 3586 | r = -EFAULT; |
| 3587 | if (copy_from_user(&u.pit_config, argp, |
| 3588 | sizeof(struct kvm_pit_config))) |
| 3589 | goto out; |
| 3590 | create_pit: |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 3591 | mutex_lock(&kvm->slots_lock); |
Avi Kivity | 269e05e | 2009-01-05 15:21:42 +0200 | [diff] [blame] | 3592 | r = -EEXIST; |
| 3593 | if (kvm->arch.vpit) |
| 3594 | goto create_pit_unlock; |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 3595 | r = -ENOMEM; |
Jan Kiszka | c5ff41c | 2009-05-14 22:42:53 +0200 | [diff] [blame] | 3596 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 3597 | if (kvm->arch.vpit) |
| 3598 | r = 0; |
Avi Kivity | 269e05e | 2009-01-05 15:21:42 +0200 | [diff] [blame] | 3599 | create_pit_unlock: |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 3600 | mutex_unlock(&kvm->slots_lock); |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 3601 | break; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3602 | case KVM_GET_IRQCHIP: { |
| 3603 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 3604 | struct kvm_irqchip *chip; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3605 | |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 3606 | chip = memdup_user(argp, sizeof(*chip)); |
| 3607 | if (IS_ERR(chip)) { |
| 3608 | r = PTR_ERR(chip); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3609 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 3610 | } |
| 3611 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3612 | r = -ENXIO; |
| 3613 | if (!irqchip_in_kernel(kvm)) |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 3614 | goto get_irqchip_out; |
| 3615 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); |
| 3616 | if (r) |
| 3617 | goto get_irqchip_out; |
| 3618 | r = -EFAULT; |
| 3619 | if (copy_to_user(argp, chip, sizeof *chip)) |
| 3620 | goto get_irqchip_out; |
| 3621 | r = 0; |
| 3622 | get_irqchip_out: |
| 3623 | kfree(chip); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3624 | break; |
| 3625 | } |
| 3626 | case KVM_SET_IRQCHIP: { |
| 3627 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 3628 | struct kvm_irqchip *chip; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3629 | |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 3630 | chip = memdup_user(argp, sizeof(*chip)); |
| 3631 | if (IS_ERR(chip)) { |
| 3632 | r = PTR_ERR(chip); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3633 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 3634 | } |
| 3635 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3636 | r = -ENXIO; |
| 3637 | if (!irqchip_in_kernel(kvm)) |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 3638 | goto set_irqchip_out; |
| 3639 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); |
| 3640 | if (r) |
| 3641 | goto set_irqchip_out; |
| 3642 | r = 0; |
| 3643 | set_irqchip_out: |
| 3644 | kfree(chip); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3645 | break; |
| 3646 | } |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3647 | case KVM_GET_PIT: { |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3648 | r = -EFAULT; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 3649 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3650 | goto out; |
| 3651 | r = -ENXIO; |
| 3652 | if (!kvm->arch.vpit) |
| 3653 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 3654 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3655 | if (r) |
| 3656 | goto out; |
| 3657 | r = -EFAULT; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 3658 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3659 | goto out; |
| 3660 | r = 0; |
| 3661 | break; |
| 3662 | } |
| 3663 | case KVM_SET_PIT: { |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3664 | r = -EFAULT; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 3665 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3666 | goto out; |
| 3667 | r = -ENXIO; |
| 3668 | if (!kvm->arch.vpit) |
| 3669 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 3670 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 3671 | break; |
| 3672 | } |
Beth Kon | e9f4275 | 2009-07-07 11:50:38 -0400 | [diff] [blame] | 3673 | case KVM_GET_PIT2: { |
| 3674 | r = -ENXIO; |
| 3675 | if (!kvm->arch.vpit) |
| 3676 | goto out; |
| 3677 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); |
| 3678 | if (r) |
| 3679 | goto out; |
| 3680 | r = -EFAULT; |
| 3681 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) |
| 3682 | goto out; |
| 3683 | r = 0; |
| 3684 | break; |
| 3685 | } |
| 3686 | case KVM_SET_PIT2: { |
| 3687 | r = -EFAULT; |
| 3688 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) |
| 3689 | goto out; |
| 3690 | r = -ENXIO; |
| 3691 | if (!kvm->arch.vpit) |
| 3692 | goto out; |
| 3693 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); |
Beth Kon | e9f4275 | 2009-07-07 11:50:38 -0400 | [diff] [blame] | 3694 | break; |
| 3695 | } |
Marcelo Tosatti | 52d939a | 2008-12-30 15:55:06 -0200 | [diff] [blame] | 3696 | case KVM_REINJECT_CONTROL: { |
| 3697 | struct kvm_reinject_control control; |
| 3698 | r = -EFAULT; |
| 3699 | if (copy_from_user(&control, argp, sizeof(control))) |
| 3700 | goto out; |
| 3701 | r = kvm_vm_ioctl_reinject(kvm, &control); |
Marcelo Tosatti | 52d939a | 2008-12-30 15:55:06 -0200 | [diff] [blame] | 3702 | break; |
| 3703 | } |
Ed Swierk | ffde22a | 2009-10-15 15:21:43 -0700 | [diff] [blame] | 3704 | case KVM_XEN_HVM_CONFIG: { |
| 3705 | r = -EFAULT; |
| 3706 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, |
| 3707 | sizeof(struct kvm_xen_hvm_config))) |
| 3708 | goto out; |
| 3709 | r = -EINVAL; |
| 3710 | if (kvm->arch.xen_hvm_config.flags) |
| 3711 | goto out; |
| 3712 | r = 0; |
| 3713 | break; |
| 3714 | } |
Glauber Costa | afbcf7a | 2009-10-16 15:28:36 -0400 | [diff] [blame] | 3715 | case KVM_SET_CLOCK: { |
Glauber Costa | afbcf7a | 2009-10-16 15:28:36 -0400 | [diff] [blame] | 3716 | struct kvm_clock_data user_ns; |
| 3717 | u64 now_ns; |
| 3718 | s64 delta; |
| 3719 | |
| 3720 | r = -EFAULT; |
| 3721 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) |
| 3722 | goto out; |
| 3723 | |
| 3724 | r = -EINVAL; |
| 3725 | if (user_ns.flags) |
| 3726 | goto out; |
| 3727 | |
| 3728 | r = 0; |
Avi Kivity | 395c6b0 | 2010-10-04 12:55:49 +0200 | [diff] [blame] | 3729 | local_irq_disable(); |
Zachary Amsden | 759379d | 2010-08-19 22:07:25 -1000 | [diff] [blame] | 3730 | now_ns = get_kernel_ns(); |
Glauber Costa | afbcf7a | 2009-10-16 15:28:36 -0400 | [diff] [blame] | 3731 | delta = user_ns.clock - now_ns; |
Avi Kivity | 395c6b0 | 2010-10-04 12:55:49 +0200 | [diff] [blame] | 3732 | local_irq_enable(); |
Glauber Costa | afbcf7a | 2009-10-16 15:28:36 -0400 | [diff] [blame] | 3733 | kvm->arch.kvmclock_offset = delta; |
| 3734 | break; |
| 3735 | } |
| 3736 | case KVM_GET_CLOCK: { |
Glauber Costa | afbcf7a | 2009-10-16 15:28:36 -0400 | [diff] [blame] | 3737 | struct kvm_clock_data user_ns; |
| 3738 | u64 now_ns; |
| 3739 | |
Avi Kivity | 395c6b0 | 2010-10-04 12:55:49 +0200 | [diff] [blame] | 3740 | local_irq_disable(); |
Zachary Amsden | 759379d | 2010-08-19 22:07:25 -1000 | [diff] [blame] | 3741 | now_ns = get_kernel_ns(); |
Glauber Costa | afbcf7a | 2009-10-16 15:28:36 -0400 | [diff] [blame] | 3742 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; |
Avi Kivity | 395c6b0 | 2010-10-04 12:55:49 +0200 | [diff] [blame] | 3743 | local_irq_enable(); |
Glauber Costa | afbcf7a | 2009-10-16 15:28:36 -0400 | [diff] [blame] | 3744 | user_ns.flags = 0; |
Vasiliy Kulikov | 97e69aa | 2010-10-30 22:54:47 +0400 | [diff] [blame] | 3745 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
Glauber Costa | afbcf7a | 2009-10-16 15:28:36 -0400 | [diff] [blame] | 3746 | |
| 3747 | r = -EFAULT; |
| 3748 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) |
| 3749 | goto out; |
| 3750 | r = 0; |
| 3751 | break; |
| 3752 | } |
| 3753 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 3754 | default: |
| 3755 | ; |
| 3756 | } |
| 3757 | out: |
| 3758 | return r; |
| 3759 | } |
| 3760 | |
Zhang Xiantao | a16b043 | 2007-11-16 14:38:21 +0800 | [diff] [blame] | 3761 | static void kvm_init_msr_list(void) |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 3762 | { |
| 3763 | u32 dummy[2]; |
| 3764 | unsigned i, j; |
| 3765 | |
Glauber Costa | e3267cb | 2009-10-06 13:24:50 -0400 | [diff] [blame] | 3766 | /* skip the first msrs in the list. KVM-specific */ |
| 3767 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 3768 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
| 3769 | continue; |
| 3770 | if (j < i) |
| 3771 | msrs_to_save[j] = msrs_to_save[i]; |
| 3772 | j++; |
| 3773 | } |
| 3774 | num_msrs_to_save = j; |
| 3775 | } |
| 3776 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 3777 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
| 3778 | const void *v) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3779 | { |
Avi Kivity | 70252a1 | 2010-01-19 12:51:22 +0200 | [diff] [blame] | 3780 | int handled = 0; |
| 3781 | int n; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3782 | |
Avi Kivity | 70252a1 | 2010-01-19 12:51:22 +0200 | [diff] [blame] | 3783 | do { |
| 3784 | n = min(len, 8); |
| 3785 | if (!(vcpu->arch.apic && |
| 3786 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, n, v)) |
| 3787 | && kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) |
| 3788 | break; |
| 3789 | handled += n; |
| 3790 | addr += n; |
| 3791 | len -= n; |
| 3792 | v += n; |
| 3793 | } while (len); |
| 3794 | |
| 3795 | return handled; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3796 | } |
| 3797 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 3798 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3799 | { |
Avi Kivity | 70252a1 | 2010-01-19 12:51:22 +0200 | [diff] [blame] | 3800 | int handled = 0; |
| 3801 | int n; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3802 | |
Avi Kivity | 70252a1 | 2010-01-19 12:51:22 +0200 | [diff] [blame] | 3803 | do { |
| 3804 | n = min(len, 8); |
| 3805 | if (!(vcpu->arch.apic && |
| 3806 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, n, v)) |
| 3807 | && kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) |
| 3808 | break; |
| 3809 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v); |
| 3810 | handled += n; |
| 3811 | addr += n; |
| 3812 | len -= n; |
| 3813 | v += n; |
| 3814 | } while (len); |
| 3815 | |
| 3816 | return handled; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3817 | } |
| 3818 | |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 3819 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
| 3820 | struct kvm_segment *var, int seg) |
| 3821 | { |
| 3822 | kvm_x86_ops->set_segment(vcpu, var, seg); |
| 3823 | } |
| 3824 | |
| 3825 | void kvm_get_segment(struct kvm_vcpu *vcpu, |
| 3826 | struct kvm_segment *var, int seg) |
| 3827 | { |
| 3828 | kvm_x86_ops->get_segment(vcpu, var, seg); |
| 3829 | } |
| 3830 | |
Xiao Guangrong | e459e32 | 2011-11-28 20:42:16 +0800 | [diff] [blame] | 3831 | gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) |
Joerg Roedel | 02f59dc | 2010-09-10 17:30:54 +0200 | [diff] [blame] | 3832 | { |
| 3833 | gpa_t t_gpa; |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3834 | struct x86_exception exception; |
Joerg Roedel | 02f59dc | 2010-09-10 17:30:54 +0200 | [diff] [blame] | 3835 | |
| 3836 | BUG_ON(!mmu_is_nested(vcpu)); |
| 3837 | |
| 3838 | /* NPT walks are always user-walks */ |
| 3839 | access |= PFERR_USER_MASK; |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3840 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &exception); |
Joerg Roedel | 02f59dc | 2010-09-10 17:30:54 +0200 | [diff] [blame] | 3841 | |
| 3842 | return t_gpa; |
| 3843 | } |
| 3844 | |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3845 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
| 3846 | struct x86_exception *exception) |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3847 | { |
| 3848 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3849 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3850 | } |
| 3851 | |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3852 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
| 3853 | struct x86_exception *exception) |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3854 | { |
| 3855 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
| 3856 | access |= PFERR_FETCH_MASK; |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3857 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3858 | } |
| 3859 | |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3860 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
| 3861 | struct x86_exception *exception) |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3862 | { |
| 3863 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
| 3864 | access |= PFERR_WRITE_MASK; |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3865 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3866 | } |
| 3867 | |
| 3868 | /* uses this to access any guest's mapped memory without checking CPL */ |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3869 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
| 3870 | struct x86_exception *exception) |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3871 | { |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3872 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3873 | } |
| 3874 | |
| 3875 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, |
| 3876 | struct kvm_vcpu *vcpu, u32 access, |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 3877 | struct x86_exception *exception) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3878 | { |
| 3879 | void *data = val; |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 3880 | int r = X86EMUL_CONTINUE; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3881 | |
| 3882 | while (bytes) { |
Joerg Roedel | 14dfe85 | 2010-09-10 17:30:49 +0200 | [diff] [blame] | 3883 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3884 | exception); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3885 | unsigned offset = addr & (PAGE_SIZE-1); |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 3886 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3887 | int ret; |
| 3888 | |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 3889 | if (gpa == UNMAPPED_GVA) |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3890 | return X86EMUL_PROPAGATE_FAULT; |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 3891 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 3892 | if (ret < 0) { |
Gleb Natapov | c3cd7ff | 2010-04-28 19:15:35 +0300 | [diff] [blame] | 3893 | r = X86EMUL_IO_NEEDED; |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 3894 | goto out; |
| 3895 | } |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3896 | |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 3897 | bytes -= toread; |
| 3898 | data += toread; |
| 3899 | addr += toread; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3900 | } |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 3901 | out: |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 3902 | return r; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 3903 | } |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 3904 | |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3905 | /* used for instruction fetching */ |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 3906 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
| 3907 | gva_t addr, void *val, unsigned int bytes, |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 3908 | struct x86_exception *exception) |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3909 | { |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 3910 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3911 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 3912 | |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3913 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 3914 | access | PFERR_FETCH_MASK, |
| 3915 | exception); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3916 | } |
| 3917 | |
Nadav Har'El | 064aea7 | 2011-05-25 23:04:56 +0300 | [diff] [blame] | 3918 | int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt, |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 3919 | gva_t addr, void *val, unsigned int bytes, |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 3920 | struct x86_exception *exception) |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3921 | { |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 3922 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3923 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 3924 | |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3925 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 3926 | exception); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3927 | } |
Nadav Har'El | 064aea7 | 2011-05-25 23:04:56 +0300 | [diff] [blame] | 3928 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3929 | |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 3930 | static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
| 3931 | gva_t addr, void *val, unsigned int bytes, |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 3932 | struct x86_exception *exception) |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3933 | { |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 3934 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 3935 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 3936 | } |
| 3937 | |
Nadav Har'El | 6a4d755 | 2011-05-25 23:08:00 +0300 | [diff] [blame] | 3938 | int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 3939 | gva_t addr, void *val, |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 3940 | unsigned int bytes, |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 3941 | struct x86_exception *exception) |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 3942 | { |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 3943 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 3944 | void *data = val; |
| 3945 | int r = X86EMUL_CONTINUE; |
| 3946 | |
| 3947 | while (bytes) { |
Joerg Roedel | 14dfe85 | 2010-09-10 17:30:49 +0200 | [diff] [blame] | 3948 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
| 3949 | PFERR_WRITE_MASK, |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3950 | exception); |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 3951 | unsigned offset = addr & (PAGE_SIZE-1); |
| 3952 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); |
| 3953 | int ret; |
| 3954 | |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 3955 | if (gpa == UNMAPPED_GVA) |
Avi Kivity | ab9ae31 | 2010-11-22 17:53:26 +0200 | [diff] [blame] | 3956 | return X86EMUL_PROPAGATE_FAULT; |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 3957 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); |
| 3958 | if (ret < 0) { |
Gleb Natapov | c3cd7ff | 2010-04-28 19:15:35 +0300 | [diff] [blame] | 3959 | r = X86EMUL_IO_NEEDED; |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 3960 | goto out; |
| 3961 | } |
| 3962 | |
| 3963 | bytes -= towrite; |
| 3964 | data += towrite; |
| 3965 | addr += towrite; |
| 3966 | } |
| 3967 | out: |
| 3968 | return r; |
| 3969 | } |
Nadav Har'El | 6a4d755 | 2011-05-25 23:08:00 +0300 | [diff] [blame] | 3970 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 3971 | |
Xiao Guangrong | af7cc7d | 2011-07-12 03:22:46 +0800 | [diff] [blame] | 3972 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
| 3973 | gpa_t *gpa, struct x86_exception *exception, |
| 3974 | bool write) |
| 3975 | { |
Avi Kivity | 97d64b7 | 2012-09-12 14:52:00 +0300 | [diff] [blame] | 3976 | u32 access = ((kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0) |
| 3977 | | (write ? PFERR_WRITE_MASK : 0); |
Xiao Guangrong | af7cc7d | 2011-07-12 03:22:46 +0800 | [diff] [blame] | 3978 | |
Avi Kivity | 97d64b7 | 2012-09-12 14:52:00 +0300 | [diff] [blame] | 3979 | if (vcpu_match_mmio_gva(vcpu, gva) |
| 3980 | && !permission_fault(vcpu->arch.walk_mmu, vcpu->arch.access, access)) { |
Xiao Guangrong | bebb106 | 2011-07-12 03:23:20 +0800 | [diff] [blame] | 3981 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | |
| 3982 | (gva & (PAGE_SIZE - 1)); |
Xiao Guangrong | 4f02264 | 2011-07-12 03:34:24 +0800 | [diff] [blame] | 3983 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
Xiao Guangrong | bebb106 | 2011-07-12 03:23:20 +0800 | [diff] [blame] | 3984 | return 1; |
| 3985 | } |
| 3986 | |
Xiao Guangrong | af7cc7d | 2011-07-12 03:22:46 +0800 | [diff] [blame] | 3987 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
| 3988 | |
| 3989 | if (*gpa == UNMAPPED_GVA) |
| 3990 | return -1; |
| 3991 | |
| 3992 | /* For APIC access vmexit */ |
| 3993 | if ((*gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) |
| 3994 | return 1; |
| 3995 | |
Xiao Guangrong | 4f02264 | 2011-07-12 03:34:24 +0800 | [diff] [blame] | 3996 | if (vcpu_match_mmio_gpa(vcpu, *gpa)) { |
| 3997 | trace_vcpu_match_mmio(gva, *gpa, write, true); |
Xiao Guangrong | bebb106 | 2011-07-12 03:23:20 +0800 | [diff] [blame] | 3998 | return 1; |
Xiao Guangrong | 4f02264 | 2011-07-12 03:34:24 +0800 | [diff] [blame] | 3999 | } |
Xiao Guangrong | bebb106 | 2011-07-12 03:23:20 +0800 | [diff] [blame] | 4000 | |
Xiao Guangrong | af7cc7d | 2011-07-12 03:22:46 +0800 | [diff] [blame] | 4001 | return 0; |
| 4002 | } |
| 4003 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 4004 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 4005 | const void *val, int bytes) |
Avi Kivity | 9f81128 | 2008-03-02 14:06:05 +0200 | [diff] [blame] | 4006 | { |
| 4007 | int ret; |
| 4008 | |
| 4009 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); |
| 4010 | if (ret < 0) |
| 4011 | return 0; |
Xiao Guangrong | f57f2ef | 2011-09-22 16:56:39 +0800 | [diff] [blame] | 4012 | kvm_mmu_pte_write(vcpu, gpa, val, bytes); |
Avi Kivity | 9f81128 | 2008-03-02 14:06:05 +0200 | [diff] [blame] | 4013 | return 1; |
| 4014 | } |
| 4015 | |
Xiao Guangrong | 77d197b | 2011-07-13 14:31:50 +0800 | [diff] [blame] | 4016 | struct read_write_emulator_ops { |
| 4017 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, |
| 4018 | int bytes); |
| 4019 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, |
| 4020 | void *val, int bytes); |
| 4021 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, |
| 4022 | int bytes, void *val); |
| 4023 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, |
| 4024 | void *val, int bytes); |
| 4025 | bool write; |
| 4026 | }; |
| 4027 | |
| 4028 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) |
| 4029 | { |
| 4030 | if (vcpu->mmio_read_completed) { |
Xiao Guangrong | 77d197b | 2011-07-13 14:31:50 +0800 | [diff] [blame] | 4031 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 4032 | vcpu->mmio_fragments[0].gpa, *(u64 *)val); |
Xiao Guangrong | 77d197b | 2011-07-13 14:31:50 +0800 | [diff] [blame] | 4033 | vcpu->mmio_read_completed = 0; |
| 4034 | return 1; |
| 4035 | } |
| 4036 | |
| 4037 | return 0; |
| 4038 | } |
| 4039 | |
| 4040 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, |
| 4041 | void *val, int bytes) |
| 4042 | { |
| 4043 | return !kvm_read_guest(vcpu->kvm, gpa, val, bytes); |
| 4044 | } |
| 4045 | |
| 4046 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, |
| 4047 | void *val, int bytes) |
| 4048 | { |
| 4049 | return emulator_write_phys(vcpu, gpa, val, bytes); |
| 4050 | } |
| 4051 | |
| 4052 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) |
| 4053 | { |
| 4054 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); |
| 4055 | return vcpu_mmio_write(vcpu, gpa, bytes, val); |
| 4056 | } |
| 4057 | |
| 4058 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, |
| 4059 | void *val, int bytes) |
| 4060 | { |
| 4061 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); |
| 4062 | return X86EMUL_IO_NEEDED; |
| 4063 | } |
| 4064 | |
| 4065 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, |
| 4066 | void *val, int bytes) |
| 4067 | { |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 4068 | struct kvm_mmio_fragment *frag = &vcpu->mmio_fragments[0]; |
| 4069 | |
Xiao Guangrong | 87da7e6 | 2012-10-24 14:07:59 +0800 | [diff] [blame] | 4070 | memcpy(vcpu->run->mmio.data, frag->data, min(8u, frag->len)); |
Xiao Guangrong | 77d197b | 2011-07-13 14:31:50 +0800 | [diff] [blame] | 4071 | return X86EMUL_CONTINUE; |
| 4072 | } |
| 4073 | |
Mathias Krause | 0fbe9b0 | 2012-08-30 01:30:17 +0200 | [diff] [blame] | 4074 | static const struct read_write_emulator_ops read_emultor = { |
Xiao Guangrong | 77d197b | 2011-07-13 14:31:50 +0800 | [diff] [blame] | 4075 | .read_write_prepare = read_prepare, |
| 4076 | .read_write_emulate = read_emulate, |
| 4077 | .read_write_mmio = vcpu_mmio_read, |
| 4078 | .read_write_exit_mmio = read_exit_mmio, |
| 4079 | }; |
| 4080 | |
Mathias Krause | 0fbe9b0 | 2012-08-30 01:30:17 +0200 | [diff] [blame] | 4081 | static const struct read_write_emulator_ops write_emultor = { |
Xiao Guangrong | 77d197b | 2011-07-13 14:31:50 +0800 | [diff] [blame] | 4082 | .read_write_emulate = write_emulate, |
| 4083 | .read_write_mmio = write_mmio, |
| 4084 | .read_write_exit_mmio = write_exit_mmio, |
| 4085 | .write = true, |
| 4086 | }; |
| 4087 | |
Xiao Guangrong | 22388a3 | 2011-07-13 14:32:31 +0800 | [diff] [blame] | 4088 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
| 4089 | unsigned int bytes, |
| 4090 | struct x86_exception *exception, |
| 4091 | struct kvm_vcpu *vcpu, |
Mathias Krause | 0fbe9b0 | 2012-08-30 01:30:17 +0200 | [diff] [blame] | 4092 | const struct read_write_emulator_ops *ops) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4093 | { |
Xiao Guangrong | af7cc7d | 2011-07-12 03:22:46 +0800 | [diff] [blame] | 4094 | gpa_t gpa; |
| 4095 | int handled, ret; |
Xiao Guangrong | 22388a3 | 2011-07-13 14:32:31 +0800 | [diff] [blame] | 4096 | bool write = ops->write; |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 4097 | struct kvm_mmio_fragment *frag; |
Xiao Guangrong | 22388a3 | 2011-07-13 14:32:31 +0800 | [diff] [blame] | 4098 | |
| 4099 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4100 | |
Xiao Guangrong | af7cc7d | 2011-07-12 03:22:46 +0800 | [diff] [blame] | 4101 | if (ret < 0) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4102 | return X86EMUL_PROPAGATE_FAULT; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4103 | |
| 4104 | /* For APIC access vmexit */ |
Xiao Guangrong | af7cc7d | 2011-07-12 03:22:46 +0800 | [diff] [blame] | 4105 | if (ret) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4106 | goto mmio; |
| 4107 | |
Xiao Guangrong | 22388a3 | 2011-07-13 14:32:31 +0800 | [diff] [blame] | 4108 | if (ops->read_write_emulate(vcpu, gpa, val, bytes)) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4109 | return X86EMUL_CONTINUE; |
| 4110 | |
| 4111 | mmio: |
| 4112 | /* |
| 4113 | * Is this MMIO handled locally? |
| 4114 | */ |
Xiao Guangrong | 22388a3 | 2011-07-13 14:32:31 +0800 | [diff] [blame] | 4115 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
Avi Kivity | 70252a1 | 2010-01-19 12:51:22 +0200 | [diff] [blame] | 4116 | if (handled == bytes) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4117 | return X86EMUL_CONTINUE; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4118 | |
Avi Kivity | 70252a1 | 2010-01-19 12:51:22 +0200 | [diff] [blame] | 4119 | gpa += handled; |
| 4120 | bytes -= handled; |
| 4121 | val += handled; |
| 4122 | |
Xiao Guangrong | 87da7e6 | 2012-10-24 14:07:59 +0800 | [diff] [blame] | 4123 | WARN_ON(vcpu->mmio_nr_fragments >= KVM_MAX_MMIO_FRAGMENTS); |
| 4124 | frag = &vcpu->mmio_fragments[vcpu->mmio_nr_fragments++]; |
| 4125 | frag->gpa = gpa; |
| 4126 | frag->data = val; |
| 4127 | frag->len = bytes; |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 4128 | return X86EMUL_CONTINUE; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4129 | } |
| 4130 | |
Xiao Guangrong | 22388a3 | 2011-07-13 14:32:31 +0800 | [diff] [blame] | 4131 | int emulator_read_write(struct x86_emulate_ctxt *ctxt, unsigned long addr, |
| 4132 | void *val, unsigned int bytes, |
| 4133 | struct x86_exception *exception, |
Mathias Krause | 0fbe9b0 | 2012-08-30 01:30:17 +0200 | [diff] [blame] | 4134 | const struct read_write_emulator_ops *ops) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4135 | { |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4136 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 4137 | gpa_t gpa; |
| 4138 | int rc; |
| 4139 | |
| 4140 | if (ops->read_write_prepare && |
| 4141 | ops->read_write_prepare(vcpu, val, bytes)) |
| 4142 | return X86EMUL_CONTINUE; |
| 4143 | |
| 4144 | vcpu->mmio_nr_fragments = 0; |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4145 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4146 | /* Crossing a page boundary? */ |
| 4147 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 4148 | int now; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4149 | |
| 4150 | now = -addr & ~PAGE_MASK; |
Xiao Guangrong | 22388a3 | 2011-07-13 14:32:31 +0800 | [diff] [blame] | 4151 | rc = emulator_read_write_onepage(addr, val, now, exception, |
| 4152 | vcpu, ops); |
| 4153 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4154 | if (rc != X86EMUL_CONTINUE) |
| 4155 | return rc; |
| 4156 | addr += now; |
| 4157 | val += now; |
| 4158 | bytes -= now; |
| 4159 | } |
Xiao Guangrong | 22388a3 | 2011-07-13 14:32:31 +0800 | [diff] [blame] | 4160 | |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 4161 | rc = emulator_read_write_onepage(addr, val, bytes, exception, |
| 4162 | vcpu, ops); |
| 4163 | if (rc != X86EMUL_CONTINUE) |
| 4164 | return rc; |
| 4165 | |
| 4166 | if (!vcpu->mmio_nr_fragments) |
| 4167 | return rc; |
| 4168 | |
| 4169 | gpa = vcpu->mmio_fragments[0].gpa; |
| 4170 | |
| 4171 | vcpu->mmio_needed = 1; |
| 4172 | vcpu->mmio_cur_fragment = 0; |
| 4173 | |
Xiao Guangrong | 87da7e6 | 2012-10-24 14:07:59 +0800 | [diff] [blame] | 4174 | vcpu->run->mmio.len = min(8u, vcpu->mmio_fragments[0].len); |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 4175 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write; |
| 4176 | vcpu->run->exit_reason = KVM_EXIT_MMIO; |
| 4177 | vcpu->run->mmio.phys_addr = gpa; |
| 4178 | |
| 4179 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); |
Xiao Guangrong | 22388a3 | 2011-07-13 14:32:31 +0800 | [diff] [blame] | 4180 | } |
| 4181 | |
| 4182 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, |
| 4183 | unsigned long addr, |
| 4184 | void *val, |
| 4185 | unsigned int bytes, |
| 4186 | struct x86_exception *exception) |
| 4187 | { |
| 4188 | return emulator_read_write(ctxt, addr, val, bytes, |
| 4189 | exception, &read_emultor); |
| 4190 | } |
| 4191 | |
| 4192 | int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, |
| 4193 | unsigned long addr, |
| 4194 | const void *val, |
| 4195 | unsigned int bytes, |
| 4196 | struct x86_exception *exception) |
| 4197 | { |
| 4198 | return emulator_read_write(ctxt, addr, (void *)val, bytes, |
| 4199 | exception, &write_emultor); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4200 | } |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4201 | |
Avi Kivity | daea3e7 | 2010-03-15 13:59:54 +0200 | [diff] [blame] | 4202 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
| 4203 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) |
| 4204 | |
| 4205 | #ifdef CONFIG_X86_64 |
| 4206 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) |
| 4207 | #else |
| 4208 | # define CMPXCHG64(ptr, old, new) \ |
Jan Kiszka | 9749a6c | 2010-03-20 10:14:13 +0100 | [diff] [blame] | 4209 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
Avi Kivity | daea3e7 | 2010-03-15 13:59:54 +0200 | [diff] [blame] | 4210 | #endif |
| 4211 | |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4212 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
| 4213 | unsigned long addr, |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4214 | const void *old, |
| 4215 | const void *new, |
| 4216 | unsigned int bytes, |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4217 | struct x86_exception *exception) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4218 | { |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4219 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
Avi Kivity | daea3e7 | 2010-03-15 13:59:54 +0200 | [diff] [blame] | 4220 | gpa_t gpa; |
| 4221 | struct page *page; |
| 4222 | char *kaddr; |
| 4223 | bool exchanged; |
| 4224 | |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 4225 | /* guests cmpxchg8b have to be emulated atomically */ |
Avi Kivity | daea3e7 | 2010-03-15 13:59:54 +0200 | [diff] [blame] | 4226 | if (bytes > 8 || (bytes & (bytes - 1))) |
| 4227 | goto emul_write; |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 4228 | |
Avi Kivity | daea3e7 | 2010-03-15 13:59:54 +0200 | [diff] [blame] | 4229 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 4230 | |
Avi Kivity | daea3e7 | 2010-03-15 13:59:54 +0200 | [diff] [blame] | 4231 | if (gpa == UNMAPPED_GVA || |
| 4232 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) |
| 4233 | goto emul_write; |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 4234 | |
Avi Kivity | daea3e7 | 2010-03-15 13:59:54 +0200 | [diff] [blame] | 4235 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
| 4236 | goto emul_write; |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 4237 | |
Avi Kivity | daea3e7 | 2010-03-15 13:59:54 +0200 | [diff] [blame] | 4238 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
Xiao Guangrong | 32cad84 | 2012-08-03 15:42:52 +0800 | [diff] [blame] | 4239 | if (is_error_page(page)) |
Wei Yongjun | c19b8bd6 | 2010-07-15 08:51:58 +0800 | [diff] [blame] | 4240 | goto emul_write; |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4241 | |
Cong Wang | 8fd75e1 | 2011-11-25 23:14:17 +0800 | [diff] [blame] | 4242 | kaddr = kmap_atomic(page); |
Avi Kivity | daea3e7 | 2010-03-15 13:59:54 +0200 | [diff] [blame] | 4243 | kaddr += offset_in_page(gpa); |
| 4244 | switch (bytes) { |
| 4245 | case 1: |
| 4246 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); |
| 4247 | break; |
| 4248 | case 2: |
| 4249 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); |
| 4250 | break; |
| 4251 | case 4: |
| 4252 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); |
| 4253 | break; |
| 4254 | case 8: |
| 4255 | exchanged = CMPXCHG64(kaddr, old, new); |
| 4256 | break; |
| 4257 | default: |
| 4258 | BUG(); |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 4259 | } |
Cong Wang | 8fd75e1 | 2011-11-25 23:14:17 +0800 | [diff] [blame] | 4260 | kunmap_atomic(kaddr); |
Avi Kivity | daea3e7 | 2010-03-15 13:59:54 +0200 | [diff] [blame] | 4261 | kvm_release_page_dirty(page); |
| 4262 | |
| 4263 | if (!exchanged) |
| 4264 | return X86EMUL_CMPXCHG_FAILED; |
| 4265 | |
Xiao Guangrong | f57f2ef | 2011-09-22 16:56:39 +0800 | [diff] [blame] | 4266 | kvm_mmu_pte_write(vcpu, gpa, new, bytes); |
Gleb Natapov | 8f6abd0 | 2010-04-13 10:21:56 +0300 | [diff] [blame] | 4267 | |
| 4268 | return X86EMUL_CONTINUE; |
Avi Kivity | 4a5f48f | 2010-03-15 13:59:55 +0200 | [diff] [blame] | 4269 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 4270 | emul_write: |
Avi Kivity | daea3e7 | 2010-03-15 13:59:54 +0200 | [diff] [blame] | 4271 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 4272 | |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4273 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4274 | } |
| 4275 | |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4276 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
| 4277 | { |
| 4278 | /* TODO: String I/O for in kernel device */ |
| 4279 | int r; |
| 4280 | |
| 4281 | if (vcpu->arch.pio.in) |
| 4282 | r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port, |
| 4283 | vcpu->arch.pio.size, pd); |
| 4284 | else |
| 4285 | r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, |
| 4286 | vcpu->arch.pio.port, vcpu->arch.pio.size, |
| 4287 | pd); |
| 4288 | return r; |
| 4289 | } |
| 4290 | |
Xiao Guangrong | 6f6fbe9 | 2011-09-22 16:55:10 +0800 | [diff] [blame] | 4291 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
| 4292 | unsigned short port, void *val, |
| 4293 | unsigned int count, bool in) |
| 4294 | { |
| 4295 | trace_kvm_pio(!in, port, size, count); |
| 4296 | |
| 4297 | vcpu->arch.pio.port = port; |
| 4298 | vcpu->arch.pio.in = in; |
| 4299 | vcpu->arch.pio.count = count; |
| 4300 | vcpu->arch.pio.size = size; |
| 4301 | |
| 4302 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { |
| 4303 | vcpu->arch.pio.count = 0; |
| 4304 | return 1; |
| 4305 | } |
| 4306 | |
| 4307 | vcpu->run->exit_reason = KVM_EXIT_IO; |
| 4308 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
| 4309 | vcpu->run->io.size = size; |
| 4310 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
| 4311 | vcpu->run->io.count = count; |
| 4312 | vcpu->run->io.port = port; |
| 4313 | |
| 4314 | return 0; |
| 4315 | } |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4316 | |
Avi Kivity | ca1d4a9 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4317 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
| 4318 | int size, unsigned short port, void *val, |
| 4319 | unsigned int count) |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4320 | { |
Avi Kivity | ca1d4a9 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4321 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
Xiao Guangrong | 6f6fbe9 | 2011-09-22 16:55:10 +0800 | [diff] [blame] | 4322 | int ret; |
Avi Kivity | ca1d4a9 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4323 | |
Gleb Natapov | 7972995 | 2010-03-18 15:20:24 +0200 | [diff] [blame] | 4324 | if (vcpu->arch.pio.count) |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4325 | goto data_avail; |
| 4326 | |
Xiao Guangrong | 6f6fbe9 | 2011-09-22 16:55:10 +0800 | [diff] [blame] | 4327 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
| 4328 | if (ret) { |
| 4329 | data_avail: |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4330 | memcpy(val, vcpu->arch.pio_data, size * count); |
Gleb Natapov | 7972995 | 2010-03-18 15:20:24 +0200 | [diff] [blame] | 4331 | vcpu->arch.pio.count = 0; |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4332 | return 1; |
| 4333 | } |
| 4334 | |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4335 | return 0; |
| 4336 | } |
| 4337 | |
Avi Kivity | ca1d4a9 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4338 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
| 4339 | int size, unsigned short port, |
| 4340 | const void *val, unsigned int count) |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4341 | { |
Avi Kivity | ca1d4a9 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4342 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
| 4343 | |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4344 | memcpy(vcpu->arch.pio_data, val, size * count); |
Xiao Guangrong | 6f6fbe9 | 2011-09-22 16:55:10 +0800 | [diff] [blame] | 4345 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4346 | } |
| 4347 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4348 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
| 4349 | { |
| 4350 | return kvm_x86_ops->get_segment_base(vcpu, seg); |
| 4351 | } |
| 4352 | |
Avi Kivity | 3cb16fe | 2011-04-20 15:38:44 +0300 | [diff] [blame] | 4353 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4354 | { |
Avi Kivity | 3cb16fe | 2011-04-20 15:38:44 +0300 | [diff] [blame] | 4355 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4356 | } |
| 4357 | |
Sheng Yang | f5f48ee | 2010-06-30 12:25:15 +0800 | [diff] [blame] | 4358 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) |
| 4359 | { |
| 4360 | if (!need_emulate_wbinvd(vcpu)) |
| 4361 | return X86EMUL_CONTINUE; |
| 4362 | |
| 4363 | if (kvm_x86_ops->has_wbinvd_exit()) { |
Jan Kiszka | 2eec734 | 2010-11-01 14:01:29 +0100 | [diff] [blame] | 4364 | int cpu = get_cpu(); |
| 4365 | |
| 4366 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); |
Sheng Yang | f5f48ee | 2010-06-30 12:25:15 +0800 | [diff] [blame] | 4367 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
| 4368 | wbinvd_ipi, NULL, 1); |
Jan Kiszka | 2eec734 | 2010-11-01 14:01:29 +0100 | [diff] [blame] | 4369 | put_cpu(); |
Sheng Yang | f5f48ee | 2010-06-30 12:25:15 +0800 | [diff] [blame] | 4370 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
Jan Kiszka | 2eec734 | 2010-11-01 14:01:29 +0100 | [diff] [blame] | 4371 | } else |
| 4372 | wbinvd(); |
Sheng Yang | f5f48ee | 2010-06-30 12:25:15 +0800 | [diff] [blame] | 4373 | return X86EMUL_CONTINUE; |
| 4374 | } |
| 4375 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); |
| 4376 | |
Avi Kivity | bcaf5cc | 2011-04-20 15:53:23 +0300 | [diff] [blame] | 4377 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
| 4378 | { |
| 4379 | kvm_emulate_wbinvd(emul_to_vcpu(ctxt)); |
| 4380 | } |
| 4381 | |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4382 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4383 | { |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4384 | return _kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4385 | } |
| 4386 | |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4387 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4388 | { |
Gleb Natapov | 338dbc9 | 2010-04-28 19:15:32 +0300 | [diff] [blame] | 4389 | |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4390 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4391 | } |
| 4392 | |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4393 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
| 4394 | { |
| 4395 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
| 4396 | } |
| 4397 | |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4398 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4399 | { |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4400 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4401 | unsigned long value; |
| 4402 | |
| 4403 | switch (cr) { |
| 4404 | case 0: |
| 4405 | value = kvm_read_cr0(vcpu); |
| 4406 | break; |
| 4407 | case 2: |
| 4408 | value = vcpu->arch.cr2; |
| 4409 | break; |
| 4410 | case 3: |
Avi Kivity | 9f8fe50 | 2010-12-05 17:30:00 +0200 | [diff] [blame] | 4411 | value = kvm_read_cr3(vcpu); |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4412 | break; |
| 4413 | case 4: |
| 4414 | value = kvm_read_cr4(vcpu); |
| 4415 | break; |
| 4416 | case 8: |
| 4417 | value = kvm_get_cr8(vcpu); |
| 4418 | break; |
| 4419 | default: |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 4420 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4421 | return 0; |
| 4422 | } |
| 4423 | |
| 4424 | return value; |
| 4425 | } |
| 4426 | |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4427 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4428 | { |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4429 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 4430 | int res = 0; |
| 4431 | |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4432 | switch (cr) { |
| 4433 | case 0: |
Avi Kivity | 49a9b07 | 2010-06-10 17:02:14 +0300 | [diff] [blame] | 4434 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4435 | break; |
| 4436 | case 2: |
| 4437 | vcpu->arch.cr2 = val; |
| 4438 | break; |
| 4439 | case 3: |
Avi Kivity | 2390218 | 2010-06-10 17:02:16 +0300 | [diff] [blame] | 4440 | res = kvm_set_cr3(vcpu, val); |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4441 | break; |
| 4442 | case 4: |
Avi Kivity | a83b29c | 2010-06-10 17:02:15 +0300 | [diff] [blame] | 4443 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4444 | break; |
| 4445 | case 8: |
Andre Przywara | eea1cff | 2010-12-21 11:12:00 +0100 | [diff] [blame] | 4446 | res = kvm_set_cr8(vcpu, val); |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4447 | break; |
| 4448 | default: |
Christoffer Dall | a737f25 | 2012-06-03 21:17:48 +0300 | [diff] [blame] | 4449 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 4450 | res = -1; |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4451 | } |
Gleb Natapov | 0f12244 | 2010-04-28 19:15:31 +0300 | [diff] [blame] | 4452 | |
| 4453 | return res; |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4454 | } |
| 4455 | |
Kevin Wolf | 4cee479 | 2012-02-08 14:34:41 +0100 | [diff] [blame] | 4456 | static void emulator_set_rflags(struct x86_emulate_ctxt *ctxt, ulong val) |
| 4457 | { |
| 4458 | kvm_set_rflags(emul_to_vcpu(ctxt), val); |
| 4459 | } |
| 4460 | |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4461 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
Gleb Natapov | 9c53724 | 2010-03-18 15:20:05 +0200 | [diff] [blame] | 4462 | { |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4463 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
Gleb Natapov | 9c53724 | 2010-03-18 15:20:05 +0200 | [diff] [blame] | 4464 | } |
| 4465 | |
Avi Kivity | 4bff1e86 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4466 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4467 | { |
Avi Kivity | 4bff1e86 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4468 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4469 | } |
| 4470 | |
Avi Kivity | 4bff1e86 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4471 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
Mohammed Gamal | 160ce1f | 2010-08-04 05:44:24 +0300 | [diff] [blame] | 4472 | { |
Avi Kivity | 4bff1e86 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4473 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
Mohammed Gamal | 160ce1f | 2010-08-04 05:44:24 +0300 | [diff] [blame] | 4474 | } |
| 4475 | |
Avi Kivity | 1ac9d0c | 2011-04-20 15:12:00 +0300 | [diff] [blame] | 4476 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
| 4477 | { |
| 4478 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); |
| 4479 | } |
| 4480 | |
| 4481 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
| 4482 | { |
| 4483 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); |
| 4484 | } |
| 4485 | |
Avi Kivity | 4bff1e86 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4486 | static unsigned long emulator_get_cached_segment_base( |
| 4487 | struct x86_emulate_ctxt *ctxt, int seg) |
Gleb Natapov | 5951c44 | 2010-04-28 19:15:29 +0300 | [diff] [blame] | 4488 | { |
Avi Kivity | 4bff1e86 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4489 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
Gleb Natapov | 5951c44 | 2010-04-28 19:15:29 +0300 | [diff] [blame] | 4490 | } |
| 4491 | |
Avi Kivity | 1aa3661 | 2011-04-27 13:20:30 +0300 | [diff] [blame] | 4492 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
| 4493 | struct desc_struct *desc, u32 *base3, |
| 4494 | int seg) |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4495 | { |
| 4496 | struct kvm_segment var; |
| 4497 | |
Avi Kivity | 4bff1e86 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4498 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
Avi Kivity | 1aa3661 | 2011-04-27 13:20:30 +0300 | [diff] [blame] | 4499 | *selector = var.selector; |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4500 | |
Gleb Natapov | 378a8b0 | 2013-01-21 15:36:48 +0200 | [diff] [blame] | 4501 | if (var.unusable) { |
| 4502 | memset(desc, 0, sizeof(*desc)); |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4503 | return false; |
Gleb Natapov | 378a8b0 | 2013-01-21 15:36:48 +0200 | [diff] [blame] | 4504 | } |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4505 | |
| 4506 | if (var.g) |
| 4507 | var.limit >>= 12; |
| 4508 | set_desc_limit(desc, var.limit); |
| 4509 | set_desc_base(desc, (unsigned long)var.base); |
Gleb Natapov | 5601d05 | 2011-03-07 14:55:06 +0200 | [diff] [blame] | 4510 | #ifdef CONFIG_X86_64 |
| 4511 | if (base3) |
| 4512 | *base3 = var.base >> 32; |
| 4513 | #endif |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4514 | desc->type = var.type; |
| 4515 | desc->s = var.s; |
| 4516 | desc->dpl = var.dpl; |
| 4517 | desc->p = var.present; |
| 4518 | desc->avl = var.avl; |
| 4519 | desc->l = var.l; |
| 4520 | desc->d = var.db; |
| 4521 | desc->g = var.g; |
| 4522 | |
| 4523 | return true; |
| 4524 | } |
| 4525 | |
Avi Kivity | 1aa3661 | 2011-04-27 13:20:30 +0300 | [diff] [blame] | 4526 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
| 4527 | struct desc_struct *desc, u32 base3, |
| 4528 | int seg) |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4529 | { |
Avi Kivity | 4bff1e86 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4530 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4531 | struct kvm_segment var; |
| 4532 | |
Avi Kivity | 1aa3661 | 2011-04-27 13:20:30 +0300 | [diff] [blame] | 4533 | var.selector = selector; |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4534 | var.base = get_desc_base(desc); |
Gleb Natapov | 5601d05 | 2011-03-07 14:55:06 +0200 | [diff] [blame] | 4535 | #ifdef CONFIG_X86_64 |
| 4536 | var.base |= ((u64)base3) << 32; |
| 4537 | #endif |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4538 | var.limit = get_desc_limit(desc); |
| 4539 | if (desc->g) |
| 4540 | var.limit = (var.limit << 12) | 0xfff; |
| 4541 | var.type = desc->type; |
| 4542 | var.present = desc->p; |
| 4543 | var.dpl = desc->dpl; |
| 4544 | var.db = desc->d; |
| 4545 | var.s = desc->s; |
| 4546 | var.l = desc->l; |
| 4547 | var.g = desc->g; |
| 4548 | var.avl = desc->avl; |
| 4549 | var.present = desc->p; |
| 4550 | var.unusable = !var.present; |
| 4551 | var.padding = 0; |
| 4552 | |
| 4553 | kvm_set_segment(vcpu, &var, seg); |
| 4554 | return; |
| 4555 | } |
| 4556 | |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4557 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
| 4558 | u32 msr_index, u64 *pdata) |
| 4559 | { |
| 4560 | return kvm_get_msr(emul_to_vcpu(ctxt), msr_index, pdata); |
| 4561 | } |
| 4562 | |
| 4563 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, |
| 4564 | u32 msr_index, u64 data) |
| 4565 | { |
Will Auld | 8fe8ab4 | 2012-11-29 12:42:12 -0800 | [diff] [blame] | 4566 | struct msr_data msr; |
| 4567 | |
| 4568 | msr.data = data; |
| 4569 | msr.index = msr_index; |
| 4570 | msr.host_initiated = false; |
| 4571 | return kvm_set_msr(emul_to_vcpu(ctxt), &msr); |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4572 | } |
| 4573 | |
Avi Kivity | 222d21a | 2011-11-10 14:57:30 +0200 | [diff] [blame] | 4574 | static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, |
| 4575 | u32 pmc, u64 *pdata) |
| 4576 | { |
| 4577 | return kvm_pmu_read_pmc(emul_to_vcpu(ctxt), pmc, pdata); |
| 4578 | } |
| 4579 | |
Avi Kivity | 6c3287f | 2011-04-20 15:43:05 +0300 | [diff] [blame] | 4580 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
| 4581 | { |
| 4582 | emul_to_vcpu(ctxt)->arch.halt_request = 1; |
| 4583 | } |
| 4584 | |
Avi Kivity | 5037f6f | 2011-03-28 16:53:59 +0200 | [diff] [blame] | 4585 | static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) |
| 4586 | { |
| 4587 | preempt_disable(); |
Avi Kivity | 5197b80 | 2011-04-20 15:55:40 +0300 | [diff] [blame] | 4588 | kvm_load_guest_fpu(emul_to_vcpu(ctxt)); |
Avi Kivity | 5037f6f | 2011-03-28 16:53:59 +0200 | [diff] [blame] | 4589 | /* |
| 4590 | * CR0.TS may reference the host fpu state, not the guest fpu state, |
| 4591 | * so it may be clear at this point. |
| 4592 | */ |
| 4593 | clts(); |
| 4594 | } |
| 4595 | |
| 4596 | static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt) |
| 4597 | { |
| 4598 | preempt_enable(); |
| 4599 | } |
| 4600 | |
Avi Kivity | 2953538 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4601 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
Joerg Roedel | 8a76d7f | 2011-04-04 12:39:27 +0200 | [diff] [blame] | 4602 | struct x86_instruction_info *info, |
Avi Kivity | c4f035c | 2011-04-04 12:39:22 +0200 | [diff] [blame] | 4603 | enum x86_intercept_stage stage) |
| 4604 | { |
Avi Kivity | 2953538 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4605 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
Avi Kivity | c4f035c | 2011-04-04 12:39:22 +0200 | [diff] [blame] | 4606 | } |
| 4607 | |
Avi Kivity | 0017f93 | 2012-06-07 14:10:16 +0300 | [diff] [blame] | 4608 | static void emulator_get_cpuid(struct x86_emulate_ctxt *ctxt, |
Stephan Bärwolf | bdb42f5 | 2012-01-12 16:43:03 +0100 | [diff] [blame] | 4609 | u32 *eax, u32 *ebx, u32 *ecx, u32 *edx) |
| 4610 | { |
Avi Kivity | 0017f93 | 2012-06-07 14:10:16 +0300 | [diff] [blame] | 4611 | kvm_cpuid(emul_to_vcpu(ctxt), eax, ebx, ecx, edx); |
Stephan Bärwolf | bdb42f5 | 2012-01-12 16:43:03 +0100 | [diff] [blame] | 4612 | } |
| 4613 | |
Avi Kivity | dd856ef | 2012-08-27 23:46:17 +0300 | [diff] [blame] | 4614 | static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg) |
| 4615 | { |
| 4616 | return kvm_register_read(emul_to_vcpu(ctxt), reg); |
| 4617 | } |
| 4618 | |
| 4619 | static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulong val) |
| 4620 | { |
| 4621 | kvm_register_write(emul_to_vcpu(ctxt), reg, val); |
| 4622 | } |
| 4623 | |
Mathias Krause | 0225fb5 | 2012-08-30 01:30:16 +0200 | [diff] [blame] | 4624 | static const struct x86_emulate_ops emulate_ops = { |
Avi Kivity | dd856ef | 2012-08-27 23:46:17 +0300 | [diff] [blame] | 4625 | .read_gpr = emulator_read_gpr, |
| 4626 | .write_gpr = emulator_write_gpr, |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 4627 | .read_std = kvm_read_guest_virt_system, |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4628 | .write_std = kvm_write_guest_virt_system, |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 4629 | .fetch = kvm_fetch_guest_virt, |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4630 | .read_emulated = emulator_read_emulated, |
| 4631 | .write_emulated = emulator_write_emulated, |
| 4632 | .cmpxchg_emulated = emulator_cmpxchg_emulated, |
Avi Kivity | 3cb16fe | 2011-04-20 15:38:44 +0300 | [diff] [blame] | 4633 | .invlpg = emulator_invlpg, |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4634 | .pio_in_emulated = emulator_pio_in_emulated, |
| 4635 | .pio_out_emulated = emulator_pio_out_emulated, |
Avi Kivity | 1aa3661 | 2011-04-27 13:20:30 +0300 | [diff] [blame] | 4636 | .get_segment = emulator_get_segment, |
| 4637 | .set_segment = emulator_set_segment, |
Gleb Natapov | 5951c44 | 2010-04-28 19:15:29 +0300 | [diff] [blame] | 4638 | .get_cached_segment_base = emulator_get_cached_segment_base, |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 4639 | .get_gdt = emulator_get_gdt, |
Mohammed Gamal | 160ce1f | 2010-08-04 05:44:24 +0300 | [diff] [blame] | 4640 | .get_idt = emulator_get_idt, |
Avi Kivity | 1ac9d0c | 2011-04-20 15:12:00 +0300 | [diff] [blame] | 4641 | .set_gdt = emulator_set_gdt, |
| 4642 | .set_idt = emulator_set_idt, |
Gleb Natapov | 52a4661 | 2010-03-18 15:20:03 +0200 | [diff] [blame] | 4643 | .get_cr = emulator_get_cr, |
| 4644 | .set_cr = emulator_set_cr, |
Kevin Wolf | 4cee479 | 2012-02-08 14:34:41 +0100 | [diff] [blame] | 4645 | .set_rflags = emulator_set_rflags, |
Gleb Natapov | 9c53724 | 2010-03-18 15:20:05 +0200 | [diff] [blame] | 4646 | .cpl = emulator_get_cpl, |
Gleb Natapov | 35aa537 | 2010-04-28 19:15:27 +0300 | [diff] [blame] | 4647 | .get_dr = emulator_get_dr, |
| 4648 | .set_dr = emulator_set_dr, |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4649 | .set_msr = emulator_set_msr, |
| 4650 | .get_msr = emulator_get_msr, |
Avi Kivity | 222d21a | 2011-11-10 14:57:30 +0200 | [diff] [blame] | 4651 | .read_pmc = emulator_read_pmc, |
Avi Kivity | 6c3287f | 2011-04-20 15:43:05 +0300 | [diff] [blame] | 4652 | .halt = emulator_halt, |
Avi Kivity | bcaf5cc | 2011-04-20 15:53:23 +0300 | [diff] [blame] | 4653 | .wbinvd = emulator_wbinvd, |
Avi Kivity | d6aa100 | 2011-04-20 15:47:13 +0300 | [diff] [blame] | 4654 | .fix_hypercall = emulator_fix_hypercall, |
Avi Kivity | 5037f6f | 2011-03-28 16:53:59 +0200 | [diff] [blame] | 4655 | .get_fpu = emulator_get_fpu, |
| 4656 | .put_fpu = emulator_put_fpu, |
Avi Kivity | c4f035c | 2011-04-04 12:39:22 +0200 | [diff] [blame] | 4657 | .intercept = emulator_intercept, |
Stephan Bärwolf | bdb42f5 | 2012-01-12 16:43:03 +0100 | [diff] [blame] | 4658 | .get_cpuid = emulator_get_cpuid, |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4659 | }; |
| 4660 | |
Gleb Natapov | 95cb229 | 2010-04-28 19:15:43 +0300 | [diff] [blame] | 4661 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
| 4662 | { |
| 4663 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask); |
| 4664 | /* |
| 4665 | * an sti; sti; sequence only disable interrupts for the first |
| 4666 | * instruction. So, if the last instruction, be it emulated or |
| 4667 | * not, left the system with the INT_STI flag enabled, it |
| 4668 | * means that the last instruction is an sti. We should not |
| 4669 | * leave the flag on in this case. The same goes for mov ss |
| 4670 | */ |
| 4671 | if (!(int_shadow & mask)) |
| 4672 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); |
| 4673 | } |
| 4674 | |
Gleb Natapov | 54b8486 | 2010-04-28 19:15:44 +0300 | [diff] [blame] | 4675 | static void inject_emulated_exception(struct kvm_vcpu *vcpu) |
| 4676 | { |
| 4677 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
Avi Kivity | da9cb57 | 2010-11-22 17:53:21 +0200 | [diff] [blame] | 4678 | if (ctxt->exception.vector == PF_VECTOR) |
Avi Kivity | 6389ee9 | 2010-11-29 16:12:30 +0200 | [diff] [blame] | 4679 | kvm_propagate_fault(vcpu, &ctxt->exception); |
Avi Kivity | da9cb57 | 2010-11-22 17:53:21 +0200 | [diff] [blame] | 4680 | else if (ctxt->exception.error_code_valid) |
| 4681 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, |
| 4682 | ctxt->exception.error_code); |
Gleb Natapov | 54b8486 | 2010-04-28 19:15:44 +0300 | [diff] [blame] | 4683 | else |
Avi Kivity | da9cb57 | 2010-11-22 17:53:21 +0200 | [diff] [blame] | 4684 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
Gleb Natapov | 54b8486 | 2010-04-28 19:15:44 +0300 | [diff] [blame] | 4685 | } |
| 4686 | |
Avi Kivity | dd856ef | 2012-08-27 23:46:17 +0300 | [diff] [blame] | 4687 | static void init_decode_cache(struct x86_emulate_ctxt *ctxt) |
Takuya Yoshikawa | b5c9ff7 | 2011-05-25 11:09:38 +0900 | [diff] [blame] | 4688 | { |
Avi Kivity | 9dac77f | 2011-06-01 15:34:25 +0300 | [diff] [blame] | 4689 | memset(&ctxt->twobyte, 0, |
Avi Kivity | dd856ef | 2012-08-27 23:46:17 +0300 | [diff] [blame] | 4690 | (void *)&ctxt->_regs - (void *)&ctxt->twobyte); |
Takuya Yoshikawa | b5c9ff7 | 2011-05-25 11:09:38 +0900 | [diff] [blame] | 4691 | |
Avi Kivity | 9dac77f | 2011-06-01 15:34:25 +0300 | [diff] [blame] | 4692 | ctxt->fetch.start = 0; |
| 4693 | ctxt->fetch.end = 0; |
| 4694 | ctxt->io_read.pos = 0; |
| 4695 | ctxt->io_read.end = 0; |
| 4696 | ctxt->mem_read.pos = 0; |
| 4697 | ctxt->mem_read.end = 0; |
Takuya Yoshikawa | b5c9ff7 | 2011-05-25 11:09:38 +0900 | [diff] [blame] | 4698 | } |
| 4699 | |
Mohammed Gamal | 8ec4722 | 2010-08-16 00:47:01 +0300 | [diff] [blame] | 4700 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
| 4701 | { |
Takuya Yoshikawa | adf5223 | 2011-05-25 11:06:16 +0900 | [diff] [blame] | 4702 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
Mohammed Gamal | 8ec4722 | 2010-08-16 00:47:01 +0300 | [diff] [blame] | 4703 | int cs_db, cs_l; |
| 4704 | |
Mohammed Gamal | 8ec4722 | 2010-08-16 00:47:01 +0300 | [diff] [blame] | 4705 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
| 4706 | |
Takuya Yoshikawa | adf5223 | 2011-05-25 11:06:16 +0900 | [diff] [blame] | 4707 | ctxt->eflags = kvm_get_rflags(vcpu); |
| 4708 | ctxt->eip = kvm_rip_read(vcpu); |
| 4709 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : |
| 4710 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : |
| 4711 | cs_l ? X86EMUL_MODE_PROT64 : |
| 4712 | cs_db ? X86EMUL_MODE_PROT32 : |
| 4713 | X86EMUL_MODE_PROT16; |
| 4714 | ctxt->guest_mode = is_guest_mode(vcpu); |
| 4715 | |
Avi Kivity | dd856ef | 2012-08-27 23:46:17 +0300 | [diff] [blame] | 4716 | init_decode_cache(ctxt); |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4717 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
Mohammed Gamal | 8ec4722 | 2010-08-16 00:47:01 +0300 | [diff] [blame] | 4718 | } |
| 4719 | |
Serge E. Hallyn | 71f9833 | 2011-04-13 09:12:54 -0500 | [diff] [blame] | 4720 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
Mohammed Gamal | 6399565 | 2010-09-19 14:34:06 +0200 | [diff] [blame] | 4721 | { |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 4722 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
Mohammed Gamal | 6399565 | 2010-09-19 14:34:06 +0200 | [diff] [blame] | 4723 | int ret; |
| 4724 | |
| 4725 | init_emulate_ctxt(vcpu); |
| 4726 | |
Avi Kivity | 9dac77f | 2011-06-01 15:34:25 +0300 | [diff] [blame] | 4727 | ctxt->op_bytes = 2; |
| 4728 | ctxt->ad_bytes = 2; |
| 4729 | ctxt->_eip = ctxt->eip + inc_eip; |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 4730 | ret = emulate_int_real(ctxt, irq); |
Mohammed Gamal | 6399565 | 2010-09-19 14:34:06 +0200 | [diff] [blame] | 4731 | |
| 4732 | if (ret != X86EMUL_CONTINUE) |
| 4733 | return EMULATE_FAIL; |
| 4734 | |
Avi Kivity | 9dac77f | 2011-06-01 15:34:25 +0300 | [diff] [blame] | 4735 | ctxt->eip = ctxt->_eip; |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 4736 | kvm_rip_write(vcpu, ctxt->eip); |
| 4737 | kvm_set_rflags(vcpu, ctxt->eflags); |
Mohammed Gamal | 6399565 | 2010-09-19 14:34:06 +0200 | [diff] [blame] | 4738 | |
| 4739 | if (irq == NMI_VECTOR) |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 4740 | vcpu->arch.nmi_pending = 0; |
Mohammed Gamal | 6399565 | 2010-09-19 14:34:06 +0200 | [diff] [blame] | 4741 | else |
| 4742 | vcpu->arch.interrupt.pending = false; |
| 4743 | |
| 4744 | return EMULATE_DONE; |
| 4745 | } |
| 4746 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); |
| 4747 | |
Gleb Natapov | 6d77dbf | 2010-05-10 11:16:56 +0300 | [diff] [blame] | 4748 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
| 4749 | { |
Joerg Roedel | fc3a915 | 2010-11-29 17:51:49 +0100 | [diff] [blame] | 4750 | int r = EMULATE_DONE; |
| 4751 | |
Gleb Natapov | 6d77dbf | 2010-05-10 11:16:56 +0300 | [diff] [blame] | 4752 | ++vcpu->stat.insn_emulation_fail; |
| 4753 | trace_kvm_emulate_insn_failed(vcpu); |
Joerg Roedel | fc3a915 | 2010-11-29 17:51:49 +0100 | [diff] [blame] | 4754 | if (!is_guest_mode(vcpu)) { |
| 4755 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
| 4756 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; |
| 4757 | vcpu->run->internal.ndata = 0; |
| 4758 | r = EMULATE_FAIL; |
| 4759 | } |
Gleb Natapov | 6d77dbf | 2010-05-10 11:16:56 +0300 | [diff] [blame] | 4760 | kvm_queue_exception(vcpu, UD_VECTOR); |
Joerg Roedel | fc3a915 | 2010-11-29 17:51:49 +0100 | [diff] [blame] | 4761 | |
| 4762 | return r; |
Gleb Natapov | 6d77dbf | 2010-05-10 11:16:56 +0300 | [diff] [blame] | 4763 | } |
| 4764 | |
Xiao Guangrong | 93c05d3 | 2013-01-13 23:49:07 +0800 | [diff] [blame] | 4765 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, |
| 4766 | bool write_fault_to_shadow_pgtable) |
Gleb Natapov | a6f177e | 2010-07-08 12:41:12 +0300 | [diff] [blame] | 4767 | { |
Xiao Guangrong | 95b3cf6 | 2013-01-13 23:46:52 +0800 | [diff] [blame] | 4768 | gpa_t gpa = cr2; |
Xiao Guangrong | 8e3d9d0 | 2012-08-21 10:57:42 +0800 | [diff] [blame] | 4769 | pfn_t pfn; |
Gleb Natapov | a6f177e | 2010-07-08 12:41:12 +0300 | [diff] [blame] | 4770 | |
Xiao Guangrong | 95b3cf6 | 2013-01-13 23:46:52 +0800 | [diff] [blame] | 4771 | if (!vcpu->arch.mmu.direct_map) { |
| 4772 | /* |
| 4773 | * Write permission should be allowed since only |
| 4774 | * write access need to be emulated. |
| 4775 | */ |
| 4776 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); |
Gleb Natapov | 68be080 | 2010-07-14 19:05:45 +0300 | [diff] [blame] | 4777 | |
Xiao Guangrong | 95b3cf6 | 2013-01-13 23:46:52 +0800 | [diff] [blame] | 4778 | /* |
| 4779 | * If the mapping is invalid in guest, let cpu retry |
| 4780 | * it to generate fault. |
| 4781 | */ |
| 4782 | if (gpa == UNMAPPED_GVA) |
| 4783 | return true; |
| 4784 | } |
Gleb Natapov | a6f177e | 2010-07-08 12:41:12 +0300 | [diff] [blame] | 4785 | |
Xiao Guangrong | 8e3d9d0 | 2012-08-21 10:57:42 +0800 | [diff] [blame] | 4786 | /* |
| 4787 | * Do not retry the unhandleable instruction if it faults on the |
| 4788 | * readonly host memory, otherwise it will goto a infinite loop: |
| 4789 | * retry instruction -> write #PF -> emulation fail -> retry |
| 4790 | * instruction -> ... |
| 4791 | */ |
| 4792 | pfn = gfn_to_pfn(vcpu->kvm, gpa_to_gfn(gpa)); |
Xiao Guangrong | 95b3cf6 | 2013-01-13 23:46:52 +0800 | [diff] [blame] | 4793 | |
| 4794 | /* |
| 4795 | * If the instruction failed on the error pfn, it can not be fixed, |
| 4796 | * report the error to userspace. |
| 4797 | */ |
| 4798 | if (is_error_noslot_pfn(pfn)) |
| 4799 | return false; |
| 4800 | |
| 4801 | kvm_release_pfn_clean(pfn); |
| 4802 | |
| 4803 | /* The instructions are well-emulated on direct mmu. */ |
| 4804 | if (vcpu->arch.mmu.direct_map) { |
| 4805 | unsigned int indirect_shadow_pages; |
| 4806 | |
| 4807 | spin_lock(&vcpu->kvm->mmu_lock); |
| 4808 | indirect_shadow_pages = vcpu->kvm->arch.indirect_shadow_pages; |
| 4809 | spin_unlock(&vcpu->kvm->mmu_lock); |
| 4810 | |
| 4811 | if (indirect_shadow_pages) |
| 4812 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
| 4813 | |
Gleb Natapov | a6f177e | 2010-07-08 12:41:12 +0300 | [diff] [blame] | 4814 | return true; |
Xiao Guangrong | 8e3d9d0 | 2012-08-21 10:57:42 +0800 | [diff] [blame] | 4815 | } |
Gleb Natapov | a6f177e | 2010-07-08 12:41:12 +0300 | [diff] [blame] | 4816 | |
Xiao Guangrong | 95b3cf6 | 2013-01-13 23:46:52 +0800 | [diff] [blame] | 4817 | /* |
| 4818 | * if emulation was due to access to shadowed page table |
| 4819 | * and it failed try to unshadow page and re-enter the |
| 4820 | * guest to let CPU execute the instruction. |
| 4821 | */ |
| 4822 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
Xiao Guangrong | 93c05d3 | 2013-01-13 23:49:07 +0800 | [diff] [blame] | 4823 | |
| 4824 | /* |
| 4825 | * If the access faults on its page table, it can not |
| 4826 | * be fixed by unprotecting shadow page and it should |
| 4827 | * be reported to userspace. |
| 4828 | */ |
| 4829 | return !write_fault_to_shadow_pgtable; |
Gleb Natapov | a6f177e | 2010-07-08 12:41:12 +0300 | [diff] [blame] | 4830 | } |
| 4831 | |
Xiao Guangrong | 1cb3f3a | 2011-09-22 17:02:48 +0800 | [diff] [blame] | 4832 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
| 4833 | unsigned long cr2, int emulation_type) |
| 4834 | { |
| 4835 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
| 4836 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; |
| 4837 | |
| 4838 | last_retry_eip = vcpu->arch.last_retry_eip; |
| 4839 | last_retry_addr = vcpu->arch.last_retry_addr; |
| 4840 | |
| 4841 | /* |
| 4842 | * If the emulation is caused by #PF and it is non-page_table |
| 4843 | * writing instruction, it means the VM-EXIT is caused by shadow |
| 4844 | * page protected, we can zap the shadow page and retry this |
| 4845 | * instruction directly. |
| 4846 | * |
| 4847 | * Note: if the guest uses a non-page-table modifying instruction |
| 4848 | * on the PDE that points to the instruction, then we will unmap |
| 4849 | * the instruction and go to an infinite loop. So, we cache the |
| 4850 | * last retried eip and the last fault address, if we meet the eip |
| 4851 | * and the address again, we can break out of the potential infinite |
| 4852 | * loop. |
| 4853 | */ |
| 4854 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; |
| 4855 | |
| 4856 | if (!(emulation_type & EMULTYPE_RETRY)) |
| 4857 | return false; |
| 4858 | |
| 4859 | if (x86_page_table_writing_insn(ctxt)) |
| 4860 | return false; |
| 4861 | |
| 4862 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) |
| 4863 | return false; |
| 4864 | |
| 4865 | vcpu->arch.last_retry_eip = ctxt->eip; |
| 4866 | vcpu->arch.last_retry_addr = cr2; |
| 4867 | |
| 4868 | if (!vcpu->arch.mmu.direct_map) |
| 4869 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); |
| 4870 | |
Xiao Guangrong | 2236802 | 2013-01-13 23:44:12 +0800 | [diff] [blame] | 4871 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
Xiao Guangrong | 1cb3f3a | 2011-09-22 17:02:48 +0800 | [diff] [blame] | 4872 | |
| 4873 | return true; |
| 4874 | } |
| 4875 | |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 4876 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu); |
| 4877 | static int complete_emulated_pio(struct kvm_vcpu *vcpu); |
| 4878 | |
Andre Przywara | 51d8b66 | 2010-12-21 11:12:02 +0100 | [diff] [blame] | 4879 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
| 4880 | unsigned long cr2, |
Andre Przywara | dc25e89 | 2010-12-21 11:12:07 +0100 | [diff] [blame] | 4881 | int emulation_type, |
| 4882 | void *insn, |
| 4883 | int insn_len) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4884 | { |
Gleb Natapov | 95cb229 | 2010-04-28 19:15:43 +0300 | [diff] [blame] | 4885 | int r; |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 4886 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4887 | bool writeback = true; |
Xiao Guangrong | 93c05d3 | 2013-01-13 23:49:07 +0800 | [diff] [blame] | 4888 | bool write_fault_to_spt = vcpu->arch.write_fault_to_shadow_pgtable; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4889 | |
Xiao Guangrong | 93c05d3 | 2013-01-13 23:49:07 +0800 | [diff] [blame] | 4890 | /* |
| 4891 | * Clear write_fault_to_shadow_pgtable here to ensure it is |
| 4892 | * never reused. |
| 4893 | */ |
| 4894 | vcpu->arch.write_fault_to_shadow_pgtable = false; |
Avi Kivity | 26eef70 | 2008-07-03 14:59:22 +0300 | [diff] [blame] | 4895 | kvm_clear_exception_queue(vcpu); |
Gleb Natapov | 8d7d8102 | 2011-04-12 12:36:21 +0300 | [diff] [blame] | 4896 | |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 4897 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
Mohammed Gamal | 8ec4722 | 2010-08-16 00:47:01 +0300 | [diff] [blame] | 4898 | init_emulate_ctxt(vcpu); |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 4899 | ctxt->interruptibility = 0; |
| 4900 | ctxt->have_exception = false; |
| 4901 | ctxt->perm_ok = false; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4902 | |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 4903 | ctxt->only_vendor_specific_insn |
Avi Kivity | 4005996 | 2011-02-01 16:32:04 +0200 | [diff] [blame] | 4904 | = emulation_type & EMULTYPE_TRAP_UD; |
| 4905 | |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 4906 | r = x86_decode_insn(ctxt, insn, insn_len); |
Joerg Roedel | d47f00a | 2010-09-10 17:30:56 +0200 | [diff] [blame] | 4907 | |
Avi Kivity | e46479f | 2010-04-11 13:05:16 +0300 | [diff] [blame] | 4908 | trace_kvm_emulate_insn_start(vcpu); |
Avi Kivity | f2b5756 | 2007-11-18 15:17:51 +0200 | [diff] [blame] | 4909 | ++vcpu->stat.insn_emulation; |
Takuya Yoshikawa | 1d2887e | 2011-07-30 18:03:34 +0900 | [diff] [blame] | 4910 | if (r != EMULATION_OK) { |
Avi Kivity | 4005996 | 2011-02-01 16:32:04 +0200 | [diff] [blame] | 4911 | if (emulation_type & EMULTYPE_TRAP_UD) |
| 4912 | return EMULATE_FAIL; |
Xiao Guangrong | 93c05d3 | 2013-01-13 23:49:07 +0800 | [diff] [blame] | 4913 | if (reexecute_instruction(vcpu, cr2, |
| 4914 | write_fault_to_spt)) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4915 | return EMULATE_DONE; |
Gleb Natapov | 6d77dbf | 2010-05-10 11:16:56 +0300 | [diff] [blame] | 4916 | if (emulation_type & EMULTYPE_SKIP) |
| 4917 | return EMULATE_FAIL; |
| 4918 | return handle_emulation_failure(vcpu); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4919 | } |
| 4920 | } |
| 4921 | |
Gleb Natapov | ba8afb6 | 2009-04-12 13:36:57 +0300 | [diff] [blame] | 4922 | if (emulation_type & EMULTYPE_SKIP) { |
Avi Kivity | 9dac77f | 2011-06-01 15:34:25 +0300 | [diff] [blame] | 4923 | kvm_rip_write(vcpu, ctxt->_eip); |
Gleb Natapov | ba8afb6 | 2009-04-12 13:36:57 +0300 | [diff] [blame] | 4924 | return EMULATE_DONE; |
| 4925 | } |
| 4926 | |
Xiao Guangrong | 1cb3f3a | 2011-09-22 17:02:48 +0800 | [diff] [blame] | 4927 | if (retry_instruction(ctxt, cr2, emulation_type)) |
| 4928 | return EMULATE_DONE; |
| 4929 | |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4930 | /* this is needed for vmware backdoor interface to work since it |
Gleb Natapov | 4d2179e | 2010-04-28 19:15:42 +0300 | [diff] [blame] | 4931 | changes registers values during IO operation */ |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4932 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
| 4933 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
Avi Kivity | dd856ef | 2012-08-27 23:46:17 +0300 | [diff] [blame] | 4934 | emulator_invalidate_register_cache(ctxt); |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4935 | } |
Gleb Natapov | 4d2179e | 2010-04-28 19:15:42 +0300 | [diff] [blame] | 4936 | |
Gleb Natapov | 5cd2191 | 2010-03-18 15:20:26 +0200 | [diff] [blame] | 4937 | restart: |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 4938 | r = x86_emulate_insn(ctxt); |
Gleb Natapov | c3cd7ff | 2010-04-28 19:15:35 +0300 | [diff] [blame] | 4939 | |
Joerg Roedel | 775fde8 | 2011-04-04 12:39:24 +0200 | [diff] [blame] | 4940 | if (r == EMULATION_INTERCEPTED) |
| 4941 | return EMULATE_DONE; |
| 4942 | |
Gleb Natapov | d2ddd1c | 2010-08-25 12:47:43 +0300 | [diff] [blame] | 4943 | if (r == EMULATION_FAILED) { |
Xiao Guangrong | 93c05d3 | 2013-01-13 23:49:07 +0800 | [diff] [blame] | 4944 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt)) |
Gleb Natapov | c3cd7ff | 2010-04-28 19:15:35 +0300 | [diff] [blame] | 4945 | return EMULATE_DONE; |
| 4946 | |
Gleb Natapov | 6d77dbf | 2010-05-10 11:16:56 +0300 | [diff] [blame] | 4947 | return handle_emulation_failure(vcpu); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4948 | } |
| 4949 | |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 4950 | if (ctxt->have_exception) { |
Gleb Natapov | e85d28f | 2010-07-29 15:11:52 +0300 | [diff] [blame] | 4951 | inject_emulated_exception(vcpu); |
Gleb Natapov | d2ddd1c | 2010-08-25 12:47:43 +0300 | [diff] [blame] | 4952 | r = EMULATE_DONE; |
| 4953 | } else if (vcpu->arch.pio.count) { |
Gleb Natapov | e85d28f | 2010-07-29 15:11:52 +0300 | [diff] [blame] | 4954 | if (!vcpu->arch.pio.in) |
| 4955 | vcpu->arch.pio.count = 0; |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 4956 | else { |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4957 | writeback = false; |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 4958 | vcpu->arch.complete_userspace_io = complete_emulated_pio; |
| 4959 | } |
Gleb Natapov | e85d28f | 2010-07-29 15:11:52 +0300 | [diff] [blame] | 4960 | r = EMULATE_DO_MMIO; |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4961 | } else if (vcpu->mmio_needed) { |
| 4962 | if (!vcpu->mmio_is_write) |
| 4963 | writeback = false; |
Gleb Natapov | e85d28f | 2010-07-29 15:11:52 +0300 | [diff] [blame] | 4964 | r = EMULATE_DO_MMIO; |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 4965 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4966 | } else if (r == EMULATION_RESTART) |
Gleb Natapov | e85d28f | 2010-07-29 15:11:52 +0300 | [diff] [blame] | 4967 | goto restart; |
Gleb Natapov | d2ddd1c | 2010-08-25 12:47:43 +0300 | [diff] [blame] | 4968 | else |
| 4969 | r = EMULATE_DONE; |
Gleb Natapov | e85d28f | 2010-07-29 15:11:52 +0300 | [diff] [blame] | 4970 | |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4971 | if (writeback) { |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 4972 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
| 4973 | kvm_set_rflags(vcpu, ctxt->eflags); |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4974 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4975 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 4976 | kvm_rip_write(vcpu, ctxt->eip); |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 4977 | } else |
| 4978 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; |
Gleb Natapov | 3457e41 | 2010-04-28 19:15:38 +0300 | [diff] [blame] | 4979 | |
Gleb Natapov | e85d28f | 2010-07-29 15:11:52 +0300 | [diff] [blame] | 4980 | return r; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4981 | } |
Andre Przywara | 51d8b66 | 2010-12-21 11:12:02 +0100 | [diff] [blame] | 4982 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 4983 | |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4984 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 4985 | { |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4986 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
Avi Kivity | ca1d4a9 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 4987 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
| 4988 | size, port, &val, 1); |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4989 | /* do not return to emulator after return from userspace */ |
Gleb Natapov | 7972995 | 2010-03-18 15:20:24 +0200 | [diff] [blame] | 4990 | vcpu->arch.pio.count = 0; |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 4991 | return ret; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 4992 | } |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 4993 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 4994 | |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 4995 | static void tsc_bad(void *info) |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 4996 | { |
Tejun Heo | 0a3aee0 | 2010-12-18 16:28:55 +0100 | [diff] [blame] | 4997 | __this_cpu_write(cpu_tsc_khz, 0); |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 4998 | } |
| 4999 | |
| 5000 | static void tsc_khz_changed(void *data) |
| 5001 | { |
| 5002 | struct cpufreq_freqs *freq = data; |
| 5003 | unsigned long khz = 0; |
| 5004 | |
| 5005 | if (data) |
| 5006 | khz = freq->new; |
| 5007 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
| 5008 | khz = cpufreq_quick_get(raw_smp_processor_id()); |
| 5009 | if (!khz) |
| 5010 | khz = tsc_khz; |
Tejun Heo | 0a3aee0 | 2010-12-18 16:28:55 +0100 | [diff] [blame] | 5011 | __this_cpu_write(cpu_tsc_khz, khz); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5012 | } |
| 5013 | |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5014 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
| 5015 | void *data) |
| 5016 | { |
| 5017 | struct cpufreq_freqs *freq = data; |
| 5018 | struct kvm *kvm; |
| 5019 | struct kvm_vcpu *vcpu; |
| 5020 | int i, send_ipi = 0; |
| 5021 | |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 5022 | /* |
| 5023 | * We allow guests to temporarily run on slowing clocks, |
| 5024 | * provided we notify them after, or to run on accelerating |
| 5025 | * clocks, provided we notify them before. Thus time never |
| 5026 | * goes backwards. |
| 5027 | * |
| 5028 | * However, we have a problem. We can't atomically update |
| 5029 | * the frequency of a given CPU from this function; it is |
| 5030 | * merely a notifier, which can be called from any CPU. |
| 5031 | * Changing the TSC frequency at arbitrary points in time |
| 5032 | * requires a recomputation of local variables related to |
| 5033 | * the TSC for each VCPU. We must flag these local variables |
| 5034 | * to be updated and be sure the update takes place with the |
| 5035 | * new frequency before any guests proceed. |
| 5036 | * |
| 5037 | * Unfortunately, the combination of hotplug CPU and frequency |
| 5038 | * change creates an intractable locking scenario; the order |
| 5039 | * of when these callouts happen is undefined with respect to |
| 5040 | * CPU hotplug, and they can race with each other. As such, |
| 5041 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is |
| 5042 | * undefined; you can actually have a CPU frequency change take |
| 5043 | * place in between the computation of X and the setting of the |
| 5044 | * variable. To protect against this problem, all updates of |
| 5045 | * the per_cpu tsc_khz variable are done in an interrupt |
| 5046 | * protected IPI, and all callers wishing to update the value |
| 5047 | * must wait for a synchronous IPI to complete (which is trivial |
| 5048 | * if the caller is on the CPU already). This establishes the |
| 5049 | * necessary total order on variable updates. |
| 5050 | * |
| 5051 | * Note that because a guest time update may take place |
| 5052 | * anytime after the setting of the VCPU's request bit, the |
| 5053 | * correct TSC value must be set before the request. However, |
| 5054 | * to ensure the update actually makes it to any guest which |
| 5055 | * starts running in hardware virtualization between the set |
| 5056 | * and the acquisition of the spinlock, we must also ping the |
| 5057 | * CPU after setting the request bit. |
| 5058 | * |
| 5059 | */ |
| 5060 | |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5061 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
| 5062 | return 0; |
| 5063 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) |
| 5064 | return 0; |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 5065 | |
| 5066 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5067 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 5068 | raw_spin_lock(&kvm_lock); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5069 | list_for_each_entry(kvm, &vm_list, vm_list) { |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 5070 | kvm_for_each_vcpu(i, vcpu, kvm) { |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5071 | if (vcpu->cpu != freq->cpu) |
| 5072 | continue; |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 5073 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5074 | if (vcpu->cpu != smp_processor_id()) |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 5075 | send_ipi = 1; |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5076 | } |
| 5077 | } |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 5078 | raw_spin_unlock(&kvm_lock); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5079 | |
| 5080 | if (freq->old < freq->new && send_ipi) { |
| 5081 | /* |
| 5082 | * We upscale the frequency. Must make the guest |
| 5083 | * doesn't see old kvmclock values while running with |
| 5084 | * the new frequency, otherwise we risk the guest sees |
| 5085 | * time go backwards. |
| 5086 | * |
| 5087 | * In case we update the frequency for another cpu |
| 5088 | * (which might be in guest context) send an interrupt |
| 5089 | * to kick the cpu out of guest context. Next time |
| 5090 | * guest context is entered kvmclock will be updated, |
| 5091 | * so the guest will not see stale values. |
| 5092 | */ |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 5093 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5094 | } |
| 5095 | return 0; |
| 5096 | } |
| 5097 | |
| 5098 | static struct notifier_block kvmclock_cpufreq_notifier_block = { |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 5099 | .notifier_call = kvmclock_cpufreq_notifier |
| 5100 | }; |
| 5101 | |
| 5102 | static int kvmclock_cpu_notifier(struct notifier_block *nfb, |
| 5103 | unsigned long action, void *hcpu) |
| 5104 | { |
| 5105 | unsigned int cpu = (unsigned long)hcpu; |
| 5106 | |
| 5107 | switch (action) { |
| 5108 | case CPU_ONLINE: |
| 5109 | case CPU_DOWN_FAILED: |
| 5110 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); |
| 5111 | break; |
| 5112 | case CPU_DOWN_PREPARE: |
| 5113 | smp_call_function_single(cpu, tsc_bad, NULL, 1); |
| 5114 | break; |
| 5115 | } |
| 5116 | return NOTIFY_OK; |
| 5117 | } |
| 5118 | |
| 5119 | static struct notifier_block kvmclock_cpu_notifier_block = { |
| 5120 | .notifier_call = kvmclock_cpu_notifier, |
| 5121 | .priority = -INT_MAX |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5122 | }; |
| 5123 | |
Zachary Amsden | b820cc0 | 2009-09-29 11:38:34 -1000 | [diff] [blame] | 5124 | static void kvm_timer_init(void) |
| 5125 | { |
| 5126 | int cpu; |
| 5127 | |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 5128 | max_tsc_khz = tsc_khz; |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 5129 | register_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
Zachary Amsden | b820cc0 | 2009-09-29 11:38:34 -1000 | [diff] [blame] | 5130 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 5131 | #ifdef CONFIG_CPU_FREQ |
| 5132 | struct cpufreq_policy policy; |
| 5133 | memset(&policy, 0, sizeof(policy)); |
Avi Kivity | 3e26f23 | 2010-12-16 12:16:34 +0200 | [diff] [blame] | 5134 | cpu = get_cpu(); |
| 5135 | cpufreq_get_policy(&policy, cpu); |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 5136 | if (policy.cpuinfo.max_freq) |
| 5137 | max_tsc_khz = policy.cpuinfo.max_freq; |
Avi Kivity | 3e26f23 | 2010-12-16 12:16:34 +0200 | [diff] [blame] | 5138 | put_cpu(); |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 5139 | #endif |
Zachary Amsden | b820cc0 | 2009-09-29 11:38:34 -1000 | [diff] [blame] | 5140 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
| 5141 | CPUFREQ_TRANSITION_NOTIFIER); |
| 5142 | } |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 5143 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 5144 | for_each_online_cpu(cpu) |
| 5145 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); |
Zachary Amsden | b820cc0 | 2009-09-29 11:38:34 -1000 | [diff] [blame] | 5146 | } |
| 5147 | |
Zhang, Yanmin | ff9d07a | 2010-04-19 13:32:45 +0800 | [diff] [blame] | 5148 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
| 5149 | |
Gleb Natapov | f5132b0 | 2011-11-10 14:57:22 +0200 | [diff] [blame] | 5150 | int kvm_is_in_guest(void) |
Zhang, Yanmin | ff9d07a | 2010-04-19 13:32:45 +0800 | [diff] [blame] | 5151 | { |
Alex,Shi | 086c985 | 2011-10-20 15:34:01 +0800 | [diff] [blame] | 5152 | return __this_cpu_read(current_vcpu) != NULL; |
Zhang, Yanmin | ff9d07a | 2010-04-19 13:32:45 +0800 | [diff] [blame] | 5153 | } |
| 5154 | |
| 5155 | static int kvm_is_user_mode(void) |
| 5156 | { |
| 5157 | int user_mode = 3; |
Zhang, Yanmin | dcf46b9 | 2010-04-20 10:13:58 +0800 | [diff] [blame] | 5158 | |
Alex,Shi | 086c985 | 2011-10-20 15:34:01 +0800 | [diff] [blame] | 5159 | if (__this_cpu_read(current_vcpu)) |
| 5160 | user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); |
Zhang, Yanmin | dcf46b9 | 2010-04-20 10:13:58 +0800 | [diff] [blame] | 5161 | |
Zhang, Yanmin | ff9d07a | 2010-04-19 13:32:45 +0800 | [diff] [blame] | 5162 | return user_mode != 0; |
| 5163 | } |
| 5164 | |
| 5165 | static unsigned long kvm_get_guest_ip(void) |
| 5166 | { |
| 5167 | unsigned long ip = 0; |
Zhang, Yanmin | dcf46b9 | 2010-04-20 10:13:58 +0800 | [diff] [blame] | 5168 | |
Alex,Shi | 086c985 | 2011-10-20 15:34:01 +0800 | [diff] [blame] | 5169 | if (__this_cpu_read(current_vcpu)) |
| 5170 | ip = kvm_rip_read(__this_cpu_read(current_vcpu)); |
Zhang, Yanmin | dcf46b9 | 2010-04-20 10:13:58 +0800 | [diff] [blame] | 5171 | |
Zhang, Yanmin | ff9d07a | 2010-04-19 13:32:45 +0800 | [diff] [blame] | 5172 | return ip; |
| 5173 | } |
| 5174 | |
| 5175 | static struct perf_guest_info_callbacks kvm_guest_cbs = { |
| 5176 | .is_in_guest = kvm_is_in_guest, |
| 5177 | .is_user_mode = kvm_is_user_mode, |
| 5178 | .get_guest_ip = kvm_get_guest_ip, |
| 5179 | }; |
| 5180 | |
| 5181 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) |
| 5182 | { |
Alex,Shi | 086c985 | 2011-10-20 15:34:01 +0800 | [diff] [blame] | 5183 | __this_cpu_write(current_vcpu, vcpu); |
Zhang, Yanmin | ff9d07a | 2010-04-19 13:32:45 +0800 | [diff] [blame] | 5184 | } |
| 5185 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); |
| 5186 | |
| 5187 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) |
| 5188 | { |
Alex,Shi | 086c985 | 2011-10-20 15:34:01 +0800 | [diff] [blame] | 5189 | __this_cpu_write(current_vcpu, NULL); |
Zhang, Yanmin | ff9d07a | 2010-04-19 13:32:45 +0800 | [diff] [blame] | 5190 | } |
| 5191 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); |
| 5192 | |
Xiao Guangrong | ce88dec | 2011-07-12 03:33:44 +0800 | [diff] [blame] | 5193 | static void kvm_set_mmio_spte_mask(void) |
| 5194 | { |
| 5195 | u64 mask; |
| 5196 | int maxphyaddr = boot_cpu_data.x86_phys_bits; |
| 5197 | |
| 5198 | /* |
| 5199 | * Set the reserved bits and the present bit of an paging-structure |
| 5200 | * entry to generate page fault with PFER.RSV = 1. |
| 5201 | */ |
| 5202 | mask = ((1ull << (62 - maxphyaddr + 1)) - 1) << maxphyaddr; |
| 5203 | mask |= 1ull; |
| 5204 | |
| 5205 | #ifdef CONFIG_X86_64 |
| 5206 | /* |
| 5207 | * If reserved bit is not supported, clear the present bit to disable |
| 5208 | * mmio page fault. |
| 5209 | */ |
| 5210 | if (maxphyaddr == 52) |
| 5211 | mask &= ~1ull; |
| 5212 | #endif |
| 5213 | |
| 5214 | kvm_mmu_set_mmio_spte_mask(mask); |
| 5215 | } |
| 5216 | |
Marcelo Tosatti | 16e8d74 | 2012-11-27 23:29:00 -0200 | [diff] [blame] | 5217 | #ifdef CONFIG_X86_64 |
| 5218 | static void pvclock_gtod_update_fn(struct work_struct *work) |
| 5219 | { |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 5220 | struct kvm *kvm; |
| 5221 | |
| 5222 | struct kvm_vcpu *vcpu; |
| 5223 | int i; |
| 5224 | |
| 5225 | raw_spin_lock(&kvm_lock); |
| 5226 | list_for_each_entry(kvm, &vm_list, vm_list) |
| 5227 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 5228 | set_bit(KVM_REQ_MASTERCLOCK_UPDATE, &vcpu->requests); |
| 5229 | atomic_set(&kvm_guest_has_master_clock, 0); |
| 5230 | raw_spin_unlock(&kvm_lock); |
Marcelo Tosatti | 16e8d74 | 2012-11-27 23:29:00 -0200 | [diff] [blame] | 5231 | } |
| 5232 | |
| 5233 | static DECLARE_WORK(pvclock_gtod_work, pvclock_gtod_update_fn); |
| 5234 | |
| 5235 | /* |
| 5236 | * Notification about pvclock gtod data update. |
| 5237 | */ |
| 5238 | static int pvclock_gtod_notify(struct notifier_block *nb, unsigned long unused, |
| 5239 | void *priv) |
| 5240 | { |
| 5241 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
| 5242 | struct timekeeper *tk = priv; |
| 5243 | |
| 5244 | update_pvclock_gtod(tk); |
| 5245 | |
| 5246 | /* disable master clock if host does not trust, or does not |
| 5247 | * use, TSC clocksource |
| 5248 | */ |
| 5249 | if (gtod->clock.vclock_mode != VCLOCK_TSC && |
| 5250 | atomic_read(&kvm_guest_has_master_clock) != 0) |
| 5251 | queue_work(system_long_wq, &pvclock_gtod_work); |
| 5252 | |
| 5253 | return 0; |
| 5254 | } |
| 5255 | |
| 5256 | static struct notifier_block pvclock_gtod_notifier = { |
| 5257 | .notifier_call = pvclock_gtod_notify, |
| 5258 | }; |
| 5259 | #endif |
| 5260 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 5261 | int kvm_arch_init(void *opaque) |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 5262 | { |
Zachary Amsden | b820cc0 | 2009-09-29 11:38:34 -1000 | [diff] [blame] | 5263 | int r; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 5264 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
| 5265 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 5266 | if (kvm_x86_ops) { |
| 5267 | printk(KERN_ERR "kvm: already loaded the other module\n"); |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 5268 | r = -EEXIST; |
| 5269 | goto out; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 5270 | } |
| 5271 | |
| 5272 | if (!ops->cpu_has_kvm_support()) { |
| 5273 | printk(KERN_ERR "kvm: no hardware support\n"); |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 5274 | r = -EOPNOTSUPP; |
| 5275 | goto out; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 5276 | } |
| 5277 | if (ops->disabled_by_bios()) { |
| 5278 | printk(KERN_ERR "kvm: disabled by bios\n"); |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 5279 | r = -EOPNOTSUPP; |
| 5280 | goto out; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 5281 | } |
| 5282 | |
Marcelo Tosatti | 013f6a5 | 2013-01-03 11:41:39 -0200 | [diff] [blame] | 5283 | r = -ENOMEM; |
| 5284 | shared_msrs = alloc_percpu(struct kvm_shared_msrs); |
| 5285 | if (!shared_msrs) { |
| 5286 | printk(KERN_ERR "kvm: failed to allocate percpu kvm_shared_msrs\n"); |
| 5287 | goto out; |
| 5288 | } |
| 5289 | |
Avi Kivity | 97db56c | 2008-01-13 13:23:56 +0200 | [diff] [blame] | 5290 | r = kvm_mmu_module_init(); |
| 5291 | if (r) |
Marcelo Tosatti | 013f6a5 | 2013-01-03 11:41:39 -0200 | [diff] [blame] | 5292 | goto out_free_percpu; |
Avi Kivity | 97db56c | 2008-01-13 13:23:56 +0200 | [diff] [blame] | 5293 | |
Xiao Guangrong | ce88dec | 2011-07-12 03:33:44 +0800 | [diff] [blame] | 5294 | kvm_set_mmio_spte_mask(); |
Avi Kivity | 97db56c | 2008-01-13 13:23:56 +0200 | [diff] [blame] | 5295 | kvm_init_msr_list(); |
| 5296 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 5297 | kvm_x86_ops = ops; |
Sheng Yang | 7b52345 | 2008-04-25 21:13:50 +0800 | [diff] [blame] | 5298 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
Sheng Yang | 4b12f0d | 2009-04-27 20:35:42 +0800 | [diff] [blame] | 5299 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5300 | |
Zachary Amsden | b820cc0 | 2009-09-29 11:38:34 -1000 | [diff] [blame] | 5301 | kvm_timer_init(); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 5302 | |
Zhang, Yanmin | ff9d07a | 2010-04-19 13:32:45 +0800 | [diff] [blame] | 5303 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
| 5304 | |
Dexuan Cui | 2acf923 | 2010-06-10 11:27:12 +0800 | [diff] [blame] | 5305 | if (cpu_has_xsave) |
| 5306 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); |
| 5307 | |
Gleb Natapov | c5cc421 | 2012-08-05 15:58:30 +0300 | [diff] [blame] | 5308 | kvm_lapic_init(); |
Marcelo Tosatti | 16e8d74 | 2012-11-27 23:29:00 -0200 | [diff] [blame] | 5309 | #ifdef CONFIG_X86_64 |
| 5310 | pvclock_gtod_register_notifier(&pvclock_gtod_notifier); |
| 5311 | #endif |
| 5312 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 5313 | return 0; |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 5314 | |
Marcelo Tosatti | 013f6a5 | 2013-01-03 11:41:39 -0200 | [diff] [blame] | 5315 | out_free_percpu: |
| 5316 | free_percpu(shared_msrs); |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 5317 | out: |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 5318 | return r; |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 5319 | } |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5320 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 5321 | void kvm_arch_exit(void) |
| 5322 | { |
Zhang, Yanmin | ff9d07a | 2010-04-19 13:32:45 +0800 | [diff] [blame] | 5323 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
| 5324 | |
Jan Kiszka | 888d256 | 2009-04-17 19:24:58 +0200 | [diff] [blame] | 5325 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
| 5326 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, |
| 5327 | CPUFREQ_TRANSITION_NOTIFIER); |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 5328 | unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
Marcelo Tosatti | 16e8d74 | 2012-11-27 23:29:00 -0200 | [diff] [blame] | 5329 | #ifdef CONFIG_X86_64 |
| 5330 | pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier); |
| 5331 | #endif |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 5332 | kvm_x86_ops = NULL; |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 5333 | kvm_mmu_module_exit(); |
Marcelo Tosatti | 013f6a5 | 2013-01-03 11:41:39 -0200 | [diff] [blame] | 5334 | free_percpu(shared_msrs); |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 5335 | } |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 5336 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5337 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
| 5338 | { |
| 5339 | ++vcpu->stat.halt_exits; |
| 5340 | if (irqchip_in_kernel(vcpu->kvm)) { |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 5341 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5342 | return 1; |
| 5343 | } else { |
| 5344 | vcpu->run->exit_reason = KVM_EXIT_HLT; |
| 5345 | return 0; |
| 5346 | } |
| 5347 | } |
| 5348 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); |
| 5349 | |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 5350 | int kvm_hv_hypercall(struct kvm_vcpu *vcpu) |
| 5351 | { |
| 5352 | u64 param, ingpa, outgpa, ret; |
| 5353 | uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0; |
| 5354 | bool fast, longmode; |
| 5355 | int cs_db, cs_l; |
| 5356 | |
| 5357 | /* |
| 5358 | * hypercall generates UD from non zero cpl and real mode |
| 5359 | * per HYPER-V spec |
| 5360 | */ |
Avi Kivity | 3eeb328 | 2010-01-21 15:31:48 +0200 | [diff] [blame] | 5361 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) { |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 5362 | kvm_queue_exception(vcpu, UD_VECTOR); |
| 5363 | return 0; |
| 5364 | } |
| 5365 | |
| 5366 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
| 5367 | longmode = is_long_mode(vcpu) && cs_l == 1; |
| 5368 | |
| 5369 | if (!longmode) { |
Gleb Natapov | ccd4693 | 2010-01-19 15:06:38 +0200 | [diff] [blame] | 5370 | param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) | |
| 5371 | (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff); |
| 5372 | ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) | |
| 5373 | (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff); |
| 5374 | outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) | |
| 5375 | (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff); |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 5376 | } |
| 5377 | #ifdef CONFIG_X86_64 |
| 5378 | else { |
| 5379 | param = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 5380 | ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX); |
| 5381 | outgpa = kvm_register_read(vcpu, VCPU_REGS_R8); |
| 5382 | } |
| 5383 | #endif |
| 5384 | |
| 5385 | code = param & 0xffff; |
| 5386 | fast = (param >> 16) & 0x1; |
| 5387 | rep_cnt = (param >> 32) & 0xfff; |
| 5388 | rep_idx = (param >> 48) & 0xfff; |
| 5389 | |
| 5390 | trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); |
| 5391 | |
Gleb Natapov | c25bc16 | 2010-01-17 15:51:24 +0200 | [diff] [blame] | 5392 | switch (code) { |
| 5393 | case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: |
| 5394 | kvm_vcpu_on_spin(vcpu); |
| 5395 | break; |
| 5396 | default: |
| 5397 | res = HV_STATUS_INVALID_HYPERCALL_CODE; |
| 5398 | break; |
| 5399 | } |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 5400 | |
| 5401 | ret = res | (((u64)rep_done & 0xfff) << 32); |
| 5402 | if (longmode) { |
| 5403 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
| 5404 | } else { |
| 5405 | kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32); |
| 5406 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff); |
| 5407 | } |
| 5408 | |
| 5409 | return 1; |
| 5410 | } |
| 5411 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5412 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
| 5413 | { |
| 5414 | unsigned long nr, a0, a1, a2, a3, ret; |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 5415 | int r = 1; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5416 | |
Gleb Natapov | 55cd8e5 | 2010-01-17 15:51:22 +0200 | [diff] [blame] | 5417 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
| 5418 | return kvm_hv_hypercall(vcpu); |
| 5419 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 5420 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 5421 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); |
| 5422 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 5423 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); |
| 5424 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5425 | |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 5426 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 5427 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5428 | if (!is_long_mode(vcpu)) { |
| 5429 | nr &= 0xFFFFFFFF; |
| 5430 | a0 &= 0xFFFFFFFF; |
| 5431 | a1 &= 0xFFFFFFFF; |
| 5432 | a2 &= 0xFFFFFFFF; |
| 5433 | a3 &= 0xFFFFFFFF; |
| 5434 | } |
| 5435 | |
Jan Kiszka | 07708c4 | 2009-08-03 18:43:28 +0200 | [diff] [blame] | 5436 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
| 5437 | ret = -KVM_EPERM; |
| 5438 | goto out; |
| 5439 | } |
| 5440 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5441 | switch (nr) { |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5442 | case KVM_HC_VAPIC_POLL_IRQ: |
| 5443 | ret = 0; |
| 5444 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5445 | default: |
| 5446 | ret = -KVM_ENOSYS; |
| 5447 | break; |
| 5448 | } |
Jan Kiszka | 07708c4 | 2009-08-03 18:43:28 +0200 | [diff] [blame] | 5449 | out: |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 5450 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
Amit Shah | f11c3a8 | 2008-02-21 01:00:30 +0530 | [diff] [blame] | 5451 | ++vcpu->stat.hypercalls; |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 5452 | return r; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5453 | } |
| 5454 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); |
| 5455 | |
Jan Kiszka | b6785de | 2012-09-20 07:43:17 +0200 | [diff] [blame] | 5456 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5457 | { |
Avi Kivity | d6aa100 | 2011-04-20 15:47:13 +0300 | [diff] [blame] | 5458 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5459 | char instruction[3]; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 5460 | unsigned long rip = kvm_rip_read(vcpu); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5461 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5462 | /* |
| 5463 | * Blow out the MMU to ensure that no other VCPU has an active mapping |
| 5464 | * to ensure that the updated hypercall appears atomically across all |
| 5465 | * VCPUs. |
| 5466 | */ |
| 5467 | kvm_mmu_zap_all(vcpu->kvm); |
| 5468 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5469 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5470 | |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 5471 | return emulator_write_emulated(ctxt, rip, instruction, 3, NULL); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 5472 | } |
| 5473 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 5474 | /* |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5475 | * Check if userspace requested an interrupt window, and that the |
| 5476 | * interrupt window is open. |
| 5477 | * |
| 5478 | * No need to exit to userspace if we already have an interrupt queued. |
| 5479 | */ |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5480 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5481 | { |
Gleb Natapov | 8061823 | 2009-04-21 17:44:56 +0300 | [diff] [blame] | 5482 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5483 | vcpu->run->request_interrupt_window && |
Gleb Natapov | 5df5664 | 2009-04-21 17:44:59 +0300 | [diff] [blame] | 5484 | kvm_arch_interrupt_allowed(vcpu)); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5485 | } |
| 5486 | |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5487 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5488 | { |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5489 | struct kvm_run *kvm_run = vcpu->run; |
| 5490 | |
Jan Kiszka | 91586a3 | 2009-10-05 13:07:21 +0200 | [diff] [blame] | 5491 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 5492 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5493 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
Jan Kiszka | 4531220 | 2008-12-11 16:54:54 +0100 | [diff] [blame] | 5494 | if (irqchip_in_kernel(vcpu->kvm)) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5495 | kvm_run->ready_for_interrupt_injection = 1; |
Jan Kiszka | 4531220 | 2008-12-11 16:54:54 +0100 | [diff] [blame] | 5496 | else |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5497 | kvm_run->ready_for_interrupt_injection = |
Gleb Natapov | fa9726b | 2009-05-11 13:35:47 +0300 | [diff] [blame] | 5498 | kvm_arch_interrupt_allowed(vcpu) && |
| 5499 | !kvm_cpu_has_interrupt(vcpu) && |
| 5500 | !kvm_event_needs_reinjection(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5501 | } |
| 5502 | |
Xiao Guangrong | 4484141 | 2012-09-07 14:14:20 +0800 | [diff] [blame] | 5503 | static int vapic_enter(struct kvm_vcpu *vcpu) |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5504 | { |
| 5505 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 5506 | struct page *page; |
| 5507 | |
| 5508 | if (!apic || !apic->vapic_addr) |
Xiao Guangrong | 4484141 | 2012-09-07 14:14:20 +0800 | [diff] [blame] | 5509 | return 0; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5510 | |
| 5511 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); |
Xiao Guangrong | 4484141 | 2012-09-07 14:14:20 +0800 | [diff] [blame] | 5512 | if (is_error_page(page)) |
| 5513 | return -EFAULT; |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 5514 | |
| 5515 | vcpu->arch.apic->vapic_page = page; |
Xiao Guangrong | 4484141 | 2012-09-07 14:14:20 +0800 | [diff] [blame] | 5516 | return 0; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5517 | } |
| 5518 | |
| 5519 | static void vapic_exit(struct kvm_vcpu *vcpu) |
| 5520 | { |
| 5521 | struct kvm_lapic *apic = vcpu->arch.apic; |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5522 | int idx; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5523 | |
| 5524 | if (!apic || !apic->vapic_addr) |
| 5525 | return; |
| 5526 | |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5527 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5528 | kvm_release_page_dirty(apic->vapic_page); |
| 5529 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5530 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5531 | } |
| 5532 | |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 5533 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
| 5534 | { |
| 5535 | int max_irr, tpr; |
| 5536 | |
| 5537 | if (!kvm_x86_ops->update_cr8_intercept) |
| 5538 | return; |
| 5539 | |
Avi Kivity | 88c808f | 2009-08-17 22:49:40 +0300 | [diff] [blame] | 5540 | if (!vcpu->arch.apic) |
| 5541 | return; |
| 5542 | |
Gleb Natapov | 8db3baa | 2009-05-11 13:35:54 +0300 | [diff] [blame] | 5543 | if (!vcpu->arch.apic->vapic_addr) |
| 5544 | max_irr = kvm_lapic_find_highest_irr(vcpu); |
| 5545 | else |
| 5546 | max_irr = -1; |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 5547 | |
| 5548 | if (max_irr != -1) |
| 5549 | max_irr >>= 4; |
| 5550 | |
| 5551 | tpr = kvm_lapic_get_cr8(vcpu); |
| 5552 | |
| 5553 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); |
| 5554 | } |
| 5555 | |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5556 | static void inject_pending_event(struct kvm_vcpu *vcpu) |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 5557 | { |
| 5558 | /* try to reinject previous events if any */ |
Gleb Natapov | b59bb7b | 2009-07-09 15:33:51 +0300 | [diff] [blame] | 5559 | if (vcpu->arch.exception.pending) { |
Avi Kivity | 5c1c85d | 2010-03-11 13:01:59 +0200 | [diff] [blame] | 5560 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
| 5561 | vcpu->arch.exception.has_error_code, |
| 5562 | vcpu->arch.exception.error_code); |
Gleb Natapov | b59bb7b | 2009-07-09 15:33:51 +0300 | [diff] [blame] | 5563 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
| 5564 | vcpu->arch.exception.has_error_code, |
Joerg Roedel | ce7ddec | 2010-04-22 12:33:13 +0200 | [diff] [blame] | 5565 | vcpu->arch.exception.error_code, |
| 5566 | vcpu->arch.exception.reinject); |
Gleb Natapov | b59bb7b | 2009-07-09 15:33:51 +0300 | [diff] [blame] | 5567 | return; |
| 5568 | } |
| 5569 | |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 5570 | if (vcpu->arch.nmi_injected) { |
| 5571 | kvm_x86_ops->set_nmi(vcpu); |
| 5572 | return; |
| 5573 | } |
| 5574 | |
| 5575 | if (vcpu->arch.interrupt.pending) { |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 5576 | kvm_x86_ops->set_irq(vcpu); |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 5577 | return; |
| 5578 | } |
| 5579 | |
| 5580 | /* try to inject new event if pending */ |
| 5581 | if (vcpu->arch.nmi_pending) { |
| 5582 | if (kvm_x86_ops->nmi_allowed(vcpu)) { |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 5583 | --vcpu->arch.nmi_pending; |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 5584 | vcpu->arch.nmi_injected = true; |
| 5585 | kvm_x86_ops->set_nmi(vcpu); |
| 5586 | } |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 5587 | } else if (kvm_cpu_has_injectable_intr(vcpu)) { |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 5588 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 5589 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
| 5590 | false); |
| 5591 | kvm_x86_ops->set_irq(vcpu); |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 5592 | } |
| 5593 | } |
| 5594 | } |
| 5595 | |
Dexuan Cui | 2acf923 | 2010-06-10 11:27:12 +0800 | [diff] [blame] | 5596 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
| 5597 | { |
| 5598 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && |
| 5599 | !vcpu->guest_xcr0_loaded) { |
| 5600 | /* kvm_set_xcr() also depends on this */ |
| 5601 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); |
| 5602 | vcpu->guest_xcr0_loaded = 1; |
| 5603 | } |
| 5604 | } |
| 5605 | |
| 5606 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) |
| 5607 | { |
| 5608 | if (vcpu->guest_xcr0_loaded) { |
| 5609 | if (vcpu->arch.xcr0 != host_xcr0) |
| 5610 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); |
| 5611 | vcpu->guest_xcr0_loaded = 0; |
| 5612 | } |
| 5613 | } |
| 5614 | |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 5615 | static void process_nmi(struct kvm_vcpu *vcpu) |
| 5616 | { |
| 5617 | unsigned limit = 2; |
| 5618 | |
| 5619 | /* |
| 5620 | * x86 is limited to one NMI running, and one NMI pending after it. |
| 5621 | * If an NMI is already in progress, limit further NMIs to just one. |
| 5622 | * Otherwise, allow two (and we'll inject the first one immediately). |
| 5623 | */ |
| 5624 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) |
| 5625 | limit = 1; |
| 5626 | |
| 5627 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); |
| 5628 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); |
| 5629 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
| 5630 | } |
| 5631 | |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 5632 | static void kvm_gen_update_masterclock(struct kvm *kvm) |
| 5633 | { |
| 5634 | #ifdef CONFIG_X86_64 |
| 5635 | int i; |
| 5636 | struct kvm_vcpu *vcpu; |
| 5637 | struct kvm_arch *ka = &kvm->arch; |
| 5638 | |
| 5639 | spin_lock(&ka->pvclock_gtod_sync_lock); |
| 5640 | kvm_make_mclock_inprogress_request(kvm); |
| 5641 | /* no guest entries from this point */ |
| 5642 | pvclock_update_vm_gtod_copy(kvm); |
| 5643 | |
| 5644 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 5645 | set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); |
| 5646 | |
| 5647 | /* guest entries allowed */ |
| 5648 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 5649 | clear_bit(KVM_REQ_MCLOCK_INPROGRESS, &vcpu->requests); |
| 5650 | |
| 5651 | spin_unlock(&ka->pvclock_gtod_sync_lock); |
| 5652 | #endif |
| 5653 | } |
| 5654 | |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 5655 | static void update_eoi_exitmap(struct kvm_vcpu *vcpu) |
| 5656 | { |
| 5657 | u64 eoi_exit_bitmap[4]; |
| 5658 | |
| 5659 | memset(eoi_exit_bitmap, 0, 32); |
| 5660 | |
| 5661 | kvm_ioapic_calculate_eoi_exitmap(vcpu, eoi_exit_bitmap); |
| 5662 | kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap); |
| 5663 | } |
| 5664 | |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5665 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5666 | { |
| 5667 | int r; |
Gleb Natapov | 6a8b1d1 | 2009-05-11 13:35:51 +0300 | [diff] [blame] | 5668 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5669 | vcpu->run->request_interrupt_window; |
Nadav Har'El | d6185f2 | 2011-09-22 13:52:56 +0300 | [diff] [blame] | 5670 | bool req_immediate_exit = 0; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5671 | |
Avi Kivity | 3e00750 | 2010-06-23 14:26:18 +0300 | [diff] [blame] | 5672 | if (vcpu->requests) { |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 5673 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 5674 | kvm_mmu_unload(vcpu); |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 5675 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
Marcelo Tosatti | 2f59971 | 2008-05-27 12:10:20 -0300 | [diff] [blame] | 5676 | __kvm_migrate_timers(vcpu); |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 5677 | if (kvm_check_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu)) |
| 5678 | kvm_gen_update_masterclock(vcpu->kvm); |
Zachary Amsden | 34c238a | 2010-09-18 14:38:14 -1000 | [diff] [blame] | 5679 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
| 5680 | r = kvm_guest_time_update(vcpu); |
Zachary Amsden | 8cfdc00 | 2010-08-19 22:07:21 -1000 | [diff] [blame] | 5681 | if (unlikely(r)) |
| 5682 | goto out; |
| 5683 | } |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 5684 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
Marcelo Tosatti | 4731d4c | 2008-09-23 13:18:39 -0300 | [diff] [blame] | 5685 | kvm_mmu_sync_roots(vcpu); |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 5686 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
Marcelo Tosatti | d4acf7e | 2008-06-06 16:37:35 -0300 | [diff] [blame] | 5687 | kvm_x86_ops->tlb_flush(vcpu); |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 5688 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5689 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5690 | r = 0; |
| 5691 | goto out; |
| 5692 | } |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 5693 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5694 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
Joerg Roedel | 71c4dfa | 2008-02-26 16:49:16 +0100 | [diff] [blame] | 5695 | r = 0; |
| 5696 | goto out; |
| 5697 | } |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 5698 | if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) { |
Avi Kivity | 02daab2 | 2009-12-30 12:40:26 +0200 | [diff] [blame] | 5699 | vcpu->fpu_active = 0; |
| 5700 | kvm_x86_ops->fpu_deactivate(vcpu); |
| 5701 | } |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 5702 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
| 5703 | /* Page is swapped out. Do synthetic halt */ |
| 5704 | vcpu->arch.apf.halted = true; |
| 5705 | r = 1; |
| 5706 | goto out; |
| 5707 | } |
Glauber Costa | c9aaa89 | 2011-07-11 15:28:14 -0400 | [diff] [blame] | 5708 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
| 5709 | record_steal_time(vcpu); |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 5710 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
| 5711 | process_nmi(vcpu); |
Nadav Har'El | d6185f2 | 2011-09-22 13:52:56 +0300 | [diff] [blame] | 5712 | req_immediate_exit = |
| 5713 | kvm_check_request(KVM_REQ_IMMEDIATE_EXIT, vcpu); |
Gleb Natapov | f5132b0 | 2011-11-10 14:57:22 +0200 | [diff] [blame] | 5714 | if (kvm_check_request(KVM_REQ_PMU, vcpu)) |
| 5715 | kvm_handle_pmu_event(vcpu); |
| 5716 | if (kvm_check_request(KVM_REQ_PMI, vcpu)) |
| 5717 | kvm_deliver_pmi(vcpu); |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 5718 | if (kvm_check_request(KVM_REQ_EOIBITMAP, vcpu)) |
| 5719 | update_eoi_exitmap(vcpu); |
Avi Kivity | 2f52d58 | 2008-01-16 12:49:30 +0200 | [diff] [blame] | 5720 | } |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5721 | |
Avi Kivity | b463a6f | 2010-07-20 15:06:17 +0300 | [diff] [blame] | 5722 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 5723 | inject_pending_event(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5724 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 5725 | /* enable NMI/IRQ window open exits if needed */ |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 5726 | if (vcpu->arch.nmi_pending) |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 5727 | kvm_x86_ops->enable_nmi_window(vcpu); |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 5728 | else if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win) |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 5729 | kvm_x86_ops->enable_irq_window(vcpu); |
Gleb Natapov | 6a8b1d1 | 2009-05-11 13:35:51 +0300 | [diff] [blame] | 5730 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 5731 | if (kvm_lapic_enabled(vcpu)) { |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 5732 | /* |
| 5733 | * Update architecture specific hints for APIC |
| 5734 | * virtual interrupt delivery. |
| 5735 | */ |
| 5736 | if (kvm_x86_ops->hwapic_irr_update) |
| 5737 | kvm_x86_ops->hwapic_irr_update(vcpu, |
| 5738 | kvm_lapic_find_highest_irr(vcpu)); |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 5739 | update_cr8_intercept(vcpu); |
| 5740 | kvm_lapic_sync_to_vapic(vcpu); |
| 5741 | } |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 5742 | } |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5743 | |
Avi Kivity | d8368af | 2012-05-14 18:07:56 +0300 | [diff] [blame] | 5744 | r = kvm_mmu_reload(vcpu); |
| 5745 | if (unlikely(r)) { |
Michael S. Tsirkin | d905c06 | 2012-06-24 19:25:00 +0300 | [diff] [blame] | 5746 | goto cancel_injection; |
Avi Kivity | d8368af | 2012-05-14 18:07:56 +0300 | [diff] [blame] | 5747 | } |
| 5748 | |
Jan Kiszka | 42dbaa5 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 5749 | preempt_disable(); |
| 5750 | |
| 5751 | kvm_x86_ops->prepare_guest_switch(vcpu); |
| 5752 | if (vcpu->fpu_active) |
| 5753 | kvm_load_guest_fpu(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5754 | kvm_load_guest_xcr0(vcpu); |
| 5755 | |
Xiao Guangrong | 6b7e2d0 | 2011-01-12 15:40:31 +0800 | [diff] [blame] | 5756 | vcpu->mode = IN_GUEST_MODE; |
| 5757 | |
| 5758 | /* We should set ->mode before check ->requests, |
| 5759 | * see the comment in make_all_cpus_request. |
| 5760 | */ |
| 5761 | smp_mb(); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5762 | |
| 5763 | local_irq_disable(); |
| 5764 | |
Xiao Guangrong | 6b7e2d0 | 2011-01-12 15:40:31 +0800 | [diff] [blame] | 5765 | if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5766 | || need_resched() || signal_pending(current)) { |
Xiao Guangrong | 6b7e2d0 | 2011-01-12 15:40:31 +0800 | [diff] [blame] | 5767 | vcpu->mode = OUTSIDE_GUEST_MODE; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5768 | smp_wmb(); |
| 5769 | local_irq_enable(); |
| 5770 | preempt_enable(); |
| 5771 | r = 1; |
Michael S. Tsirkin | d905c06 | 2012-06-24 19:25:00 +0300 | [diff] [blame] | 5772 | goto cancel_injection; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5773 | } |
| 5774 | |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5775 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5776 | |
Nadav Har'El | d6185f2 | 2011-09-22 13:52:56 +0300 | [diff] [blame] | 5777 | if (req_immediate_exit) |
| 5778 | smp_send_reschedule(vcpu->cpu); |
| 5779 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5780 | kvm_guest_enter(); |
| 5781 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5782 | if (unlikely(vcpu->arch.switch_db_regs)) { |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5783 | set_debugreg(0, 7); |
| 5784 | set_debugreg(vcpu->arch.eff_db[0], 0); |
| 5785 | set_debugreg(vcpu->arch.eff_db[1], 1); |
| 5786 | set_debugreg(vcpu->arch.eff_db[2], 2); |
| 5787 | set_debugreg(vcpu->arch.eff_db[3], 3); |
| 5788 | } |
| 5789 | |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 5790 | trace_kvm_entry(vcpu->vcpu_id); |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5791 | kvm_x86_ops->run(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5792 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 5793 | /* |
| 5794 | * If the guest has used debug registers, at least dr7 |
| 5795 | * will be disabled while returning to the host. |
| 5796 | * If we don't have active breakpoints in the host, we don't |
| 5797 | * care about the messed up debug address registers. But if |
| 5798 | * we have some of them active, restore the old state. |
| 5799 | */ |
Frederic Weisbecker | 59d8eb5 | 2009-11-10 11:03:12 +0100 | [diff] [blame] | 5800 | if (hw_breakpoint_active()) |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 5801 | hw_breakpoint_restore(); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5802 | |
Marcelo Tosatti | 886b470 | 2012-11-27 23:28:58 -0200 | [diff] [blame] | 5803 | vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu, |
| 5804 | native_read_tsc()); |
Zachary Amsden | 1d5f066 | 2010-08-19 22:07:30 -1000 | [diff] [blame] | 5805 | |
Xiao Guangrong | 6b7e2d0 | 2011-01-12 15:40:31 +0800 | [diff] [blame] | 5806 | vcpu->mode = OUTSIDE_GUEST_MODE; |
Avi Kivity | d94e1dc | 2010-05-03 16:54:48 +0300 | [diff] [blame] | 5807 | smp_wmb(); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5808 | local_irq_enable(); |
| 5809 | |
| 5810 | ++vcpu->stat.exits; |
| 5811 | |
| 5812 | /* |
| 5813 | * We must have an instruction between local_irq_enable() and |
| 5814 | * kvm_guest_exit(), so the timer interrupt isn't delayed by |
| 5815 | * the interrupt shadow. The stat.exits increment will do nicely. |
| 5816 | * But we need to prevent reordering, hence this barrier(): |
| 5817 | */ |
| 5818 | barrier(); |
| 5819 | |
| 5820 | kvm_guest_exit(); |
| 5821 | |
| 5822 | preempt_enable(); |
| 5823 | |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5824 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 5825 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5826 | /* |
| 5827 | * Profile KVM exit RIPs: |
| 5828 | */ |
| 5829 | if (unlikely(prof_on == KVM_PROFILING)) { |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 5830 | unsigned long rip = kvm_rip_read(vcpu); |
| 5831 | profile_hit(KVM_PROFILING, (void *)rip); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5832 | } |
| 5833 | |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 5834 | if (unlikely(vcpu->arch.tsc_always_catchup)) |
| 5835 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 5836 | |
Michael S. Tsirkin | 5cfb1d5 | 2012-06-24 19:24:54 +0300 | [diff] [blame] | 5837 | if (vcpu->arch.apic_attention) |
| 5838 | kvm_lapic_sync_from_vapic(vcpu); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5839 | |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5840 | r = kvm_x86_ops->handle_exit(vcpu); |
Michael S. Tsirkin | d905c06 | 2012-06-24 19:25:00 +0300 | [diff] [blame] | 5841 | return r; |
| 5842 | |
| 5843 | cancel_injection: |
| 5844 | kvm_x86_ops->cancel_injection(vcpu); |
Michael S. Tsirkin | ae7a2a3 | 2012-06-24 19:25:07 +0300 | [diff] [blame] | 5845 | if (unlikely(vcpu->arch.apic_attention)) |
| 5846 | kvm_lapic_sync_from_vapic(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5847 | out: |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 5848 | return r; |
| 5849 | } |
| 5850 | |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 5851 | |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5852 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 5853 | { |
| 5854 | int r; |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5855 | struct kvm *kvm = vcpu->kvm; |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 5856 | |
| 5857 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { |
Jan Kiszka | 1b10bf3 | 2008-09-30 10:41:06 +0200 | [diff] [blame] | 5858 | pr_debug("vcpu %d received sipi with vector # %x\n", |
| 5859 | vcpu->vcpu_id, vcpu->arch.sipi_vector); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 5860 | kvm_lapic_reset(vcpu); |
Jan Kiszka | 57f252f | 2013-03-12 10:20:24 +0100 | [diff] [blame^] | 5861 | kvm_vcpu_reset(vcpu); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 5862 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5863 | } |
| 5864 | |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5865 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
Xiao Guangrong | 4484141 | 2012-09-07 14:14:20 +0800 | [diff] [blame] | 5866 | r = vapic_enter(vcpu); |
| 5867 | if (r) { |
| 5868 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
| 5869 | return r; |
| 5870 | } |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 5871 | |
| 5872 | r = 1; |
| 5873 | while (r > 0) { |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 5874 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
| 5875 | !vcpu->arch.apf.halted) |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5876 | r = vcpu_enter_guest(vcpu); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 5877 | else { |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5878 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 5879 | kvm_vcpu_block(vcpu); |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5880 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 5881 | if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 5882 | { |
| 5883 | switch(vcpu->arch.mp_state) { |
| 5884 | case KVM_MP_STATE_HALTED: |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 5885 | vcpu->arch.mp_state = |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 5886 | KVM_MP_STATE_RUNNABLE; |
| 5887 | case KVM_MP_STATE_RUNNABLE: |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 5888 | vcpu->arch.apf.halted = false; |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 5889 | break; |
| 5890 | case KVM_MP_STATE_SIPI_RECEIVED: |
| 5891 | default: |
| 5892 | r = -EINTR; |
| 5893 | break; |
| 5894 | } |
| 5895 | } |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 5896 | } |
| 5897 | |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 5898 | if (r <= 0) |
| 5899 | break; |
| 5900 | |
| 5901 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); |
| 5902 | if (kvm_cpu_has_pending_timer(vcpu)) |
| 5903 | kvm_inject_pending_timer_irqs(vcpu); |
| 5904 | |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5905 | if (dm_request_for_irq_injection(vcpu)) { |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 5906 | r = -EINTR; |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5907 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 5908 | ++vcpu->stat.request_irq_exits; |
| 5909 | } |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 5910 | |
| 5911 | kvm_check_async_pf_completion(vcpu); |
| 5912 | |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 5913 | if (signal_pending(current)) { |
| 5914 | r = -EINTR; |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 5915 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 5916 | ++vcpu->stat.signal_exits; |
| 5917 | } |
| 5918 | if (need_resched()) { |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5919 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 5920 | kvm_resched(vcpu); |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5921 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 5922 | } |
| 5923 | } |
| 5924 | |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 5925 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5926 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 5927 | vapic_exit(vcpu); |
| 5928 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 5929 | return r; |
| 5930 | } |
| 5931 | |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 5932 | static inline int complete_emulated_io(struct kvm_vcpu *vcpu) |
| 5933 | { |
| 5934 | int r; |
| 5935 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
| 5936 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); |
| 5937 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
| 5938 | if (r != EMULATE_DONE) |
| 5939 | return 0; |
| 5940 | return 1; |
| 5941 | } |
| 5942 | |
| 5943 | static int complete_emulated_pio(struct kvm_vcpu *vcpu) |
| 5944 | { |
| 5945 | BUG_ON(!vcpu->arch.pio.count); |
| 5946 | |
| 5947 | return complete_emulated_io(vcpu); |
| 5948 | } |
| 5949 | |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 5950 | /* |
| 5951 | * Implements the following, as a state machine: |
| 5952 | * |
| 5953 | * read: |
| 5954 | * for each fragment |
Xiao Guangrong | 87da7e6 | 2012-10-24 14:07:59 +0800 | [diff] [blame] | 5955 | * for each mmio piece in the fragment |
| 5956 | * write gpa, len |
| 5957 | * exit |
| 5958 | * copy data |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 5959 | * execute insn |
| 5960 | * |
| 5961 | * write: |
| 5962 | * for each fragment |
Xiao Guangrong | 87da7e6 | 2012-10-24 14:07:59 +0800 | [diff] [blame] | 5963 | * for each mmio piece in the fragment |
| 5964 | * write gpa, len |
| 5965 | * copy data |
| 5966 | * exit |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 5967 | */ |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 5968 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu) |
Avi Kivity | 5287f19 | 2010-01-19 14:20:10 +0200 | [diff] [blame] | 5969 | { |
| 5970 | struct kvm_run *run = vcpu->run; |
Avi Kivity | f78146b | 2012-04-18 19:22:47 +0300 | [diff] [blame] | 5971 | struct kvm_mmio_fragment *frag; |
Xiao Guangrong | 87da7e6 | 2012-10-24 14:07:59 +0800 | [diff] [blame] | 5972 | unsigned len; |
Avi Kivity | 5287f19 | 2010-01-19 14:20:10 +0200 | [diff] [blame] | 5973 | |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 5974 | BUG_ON(!vcpu->mmio_needed); |
Avi Kivity | 5287f19 | 2010-01-19 14:20:10 +0200 | [diff] [blame] | 5975 | |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 5976 | /* Complete previous fragment */ |
Xiao Guangrong | 87da7e6 | 2012-10-24 14:07:59 +0800 | [diff] [blame] | 5977 | frag = &vcpu->mmio_fragments[vcpu->mmio_cur_fragment]; |
| 5978 | len = min(8u, frag->len); |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 5979 | if (!vcpu->mmio_is_write) |
Xiao Guangrong | 87da7e6 | 2012-10-24 14:07:59 +0800 | [diff] [blame] | 5980 | memcpy(frag->data, run->mmio.data, len); |
| 5981 | |
| 5982 | if (frag->len <= 8) { |
| 5983 | /* Switch to the next fragment. */ |
| 5984 | frag++; |
| 5985 | vcpu->mmio_cur_fragment++; |
| 5986 | } else { |
| 5987 | /* Go forward to the next mmio piece. */ |
| 5988 | frag->data += len; |
| 5989 | frag->gpa += len; |
| 5990 | frag->len -= len; |
| 5991 | } |
| 5992 | |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 5993 | if (vcpu->mmio_cur_fragment == vcpu->mmio_nr_fragments) { |
| 5994 | vcpu->mmio_needed = 0; |
Avi Kivity | cef4dea | 2010-01-20 12:01:20 +0200 | [diff] [blame] | 5995 | if (vcpu->mmio_is_write) |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 5996 | return 1; |
| 5997 | vcpu->mmio_read_completed = 1; |
| 5998 | return complete_emulated_io(vcpu); |
Avi Kivity | 5287f19 | 2010-01-19 14:20:10 +0200 | [diff] [blame] | 5999 | } |
Xiao Guangrong | 87da7e6 | 2012-10-24 14:07:59 +0800 | [diff] [blame] | 6000 | |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 6001 | run->exit_reason = KVM_EXIT_MMIO; |
| 6002 | run->mmio.phys_addr = frag->gpa; |
| 6003 | if (vcpu->mmio_is_write) |
Xiao Guangrong | 87da7e6 | 2012-10-24 14:07:59 +0800 | [diff] [blame] | 6004 | memcpy(run->mmio.data, frag->data, min(8u, frag->len)); |
| 6005 | run->mmio.len = min(8u, frag->len); |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 6006 | run->mmio.is_write = vcpu->mmio_is_write; |
| 6007 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; |
| 6008 | return 0; |
Avi Kivity | 5287f19 | 2010-01-19 14:20:10 +0200 | [diff] [blame] | 6009 | } |
| 6010 | |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 6011 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6012 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 6013 | { |
| 6014 | int r; |
| 6015 | sigset_t sigsaved; |
| 6016 | |
Avi Kivity | e5c3014 | 2011-01-11 12:15:54 +0200 | [diff] [blame] | 6017 | if (!tsk_used_math(current) && init_fpu(current)) |
| 6018 | return -ENOMEM; |
| 6019 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6020 | if (vcpu->sigset_active) |
| 6021 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); |
| 6022 | |
Avi Kivity | ac9f6dc | 2008-07-06 15:48:31 +0300 | [diff] [blame] | 6023 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
| 6024 | kvm_vcpu_block(vcpu); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 6025 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
Avi Kivity | ac9f6dc | 2008-07-06 15:48:31 +0300 | [diff] [blame] | 6026 | r = -EAGAIN; |
| 6027 | goto out; |
| 6028 | } |
| 6029 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6030 | /* re-sync apic's tpr */ |
Andre Przywara | eea1cff | 2010-12-21 11:12:00 +0100 | [diff] [blame] | 6031 | if (!irqchip_in_kernel(vcpu->kvm)) { |
| 6032 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { |
| 6033 | r = -EINVAL; |
| 6034 | goto out; |
| 6035 | } |
| 6036 | } |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6037 | |
Gleb Natapov | 716d51a | 2012-09-03 15:24:26 +0300 | [diff] [blame] | 6038 | if (unlikely(vcpu->arch.complete_userspace_io)) { |
| 6039 | int (*cui)(struct kvm_vcpu *) = vcpu->arch.complete_userspace_io; |
| 6040 | vcpu->arch.complete_userspace_io = NULL; |
| 6041 | r = cui(vcpu); |
| 6042 | if (r <= 0) |
| 6043 | goto out; |
| 6044 | } else |
| 6045 | WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed); |
Avi Kivity | 5287f19 | 2010-01-19 14:20:10 +0200 | [diff] [blame] | 6046 | |
Avi Kivity | 851ba69 | 2009-08-24 11:10:17 +0300 | [diff] [blame] | 6047 | r = __vcpu_run(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6048 | |
| 6049 | out: |
Marcelo Tosatti | f1d86e4 | 2010-05-03 23:04:27 -0300 | [diff] [blame] | 6050 | post_kvm_run_save(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6051 | if (vcpu->sigset_active) |
| 6052 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 6053 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6054 | return r; |
| 6055 | } |
| 6056 | |
| 6057 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 6058 | { |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 6059 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
| 6060 | /* |
| 6061 | * We are here if userspace calls get_regs() in the middle of |
| 6062 | * instruction emulation. Registers state needs to be copied |
Guo Chao | 4a96998 | 2012-06-28 15:17:27 +0800 | [diff] [blame] | 6063 | * back from emulation context to vcpu. Userspace shouldn't do |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 6064 | * that usually, but some bad designed PV devices (vmware |
| 6065 | * backdoor interface) need this to work |
| 6066 | */ |
Avi Kivity | dd856ef | 2012-08-27 23:46:17 +0300 | [diff] [blame] | 6067 | emulator_writeback_register_cache(&vcpu->arch.emulate_ctxt); |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 6068 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
| 6069 | } |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 6070 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 6071 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); |
| 6072 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 6073 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); |
| 6074 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); |
| 6075 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); |
| 6076 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); |
| 6077 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6078 | #ifdef CONFIG_X86_64 |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 6079 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
| 6080 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); |
| 6081 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); |
| 6082 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); |
| 6083 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); |
| 6084 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); |
| 6085 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); |
| 6086 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6087 | #endif |
| 6088 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 6089 | regs->rip = kvm_rip_read(vcpu); |
Jan Kiszka | 91586a3 | 2009-10-05 13:07:21 +0200 | [diff] [blame] | 6090 | regs->rflags = kvm_get_rflags(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6091 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6092 | return 0; |
| 6093 | } |
| 6094 | |
| 6095 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 6096 | { |
Gleb Natapov | 7ae441e | 2011-03-31 12:06:41 +0200 | [diff] [blame] | 6097 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
| 6098 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
| 6099 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 6100 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
| 6101 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); |
| 6102 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); |
| 6103 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); |
| 6104 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); |
| 6105 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); |
| 6106 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); |
| 6107 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6108 | #ifdef CONFIG_X86_64 |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 6109 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
| 6110 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); |
| 6111 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); |
| 6112 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); |
| 6113 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); |
| 6114 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); |
| 6115 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); |
| 6116 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6117 | #endif |
| 6118 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 6119 | kvm_rip_write(vcpu, regs->rip); |
Jan Kiszka | 91586a3 | 2009-10-05 13:07:21 +0200 | [diff] [blame] | 6120 | kvm_set_rflags(vcpu, regs->rflags); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6121 | |
Jan Kiszka | b4f14ab | 2008-04-30 17:59:04 +0200 | [diff] [blame] | 6122 | vcpu->arch.exception.pending = false; |
| 6123 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 6124 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
| 6125 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6126 | return 0; |
| 6127 | } |
| 6128 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6129 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
| 6130 | { |
| 6131 | struct kvm_segment cs; |
| 6132 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 6133 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6134 | *db = cs.db; |
| 6135 | *l = cs.l; |
| 6136 | } |
| 6137 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); |
| 6138 | |
| 6139 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| 6140 | struct kvm_sregs *sregs) |
| 6141 | { |
Gleb Natapov | 89a27f4 | 2010-02-16 10:51:48 +0200 | [diff] [blame] | 6142 | struct desc_ptr dt; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6143 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 6144 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
| 6145 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); |
| 6146 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); |
| 6147 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); |
| 6148 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); |
| 6149 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6150 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 6151 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
| 6152 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6153 | |
| 6154 | kvm_x86_ops->get_idt(vcpu, &dt); |
Gleb Natapov | 89a27f4 | 2010-02-16 10:51:48 +0200 | [diff] [blame] | 6155 | sregs->idt.limit = dt.size; |
| 6156 | sregs->idt.base = dt.address; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6157 | kvm_x86_ops->get_gdt(vcpu, &dt); |
Gleb Natapov | 89a27f4 | 2010-02-16 10:51:48 +0200 | [diff] [blame] | 6158 | sregs->gdt.limit = dt.size; |
| 6159 | sregs->gdt.base = dt.address; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6160 | |
Avi Kivity | 4d4ec08 | 2009-12-29 18:07:30 +0200 | [diff] [blame] | 6161 | sregs->cr0 = kvm_read_cr0(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 6162 | sregs->cr2 = vcpu->arch.cr2; |
Avi Kivity | 9f8fe50 | 2010-12-05 17:30:00 +0200 | [diff] [blame] | 6163 | sregs->cr3 = kvm_read_cr3(vcpu); |
Avi Kivity | fc78f51 | 2009-12-07 12:16:48 +0200 | [diff] [blame] | 6164 | sregs->cr4 = kvm_read_cr4(vcpu); |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 6165 | sregs->cr8 = kvm_get_cr8(vcpu); |
Avi Kivity | f6801df | 2010-01-21 15:31:50 +0200 | [diff] [blame] | 6166 | sregs->efer = vcpu->arch.efer; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6167 | sregs->apic_base = kvm_get_apic_base(vcpu); |
| 6168 | |
Gleb Natapov | 923c61b | 2009-05-11 13:35:48 +0300 | [diff] [blame] | 6169 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6170 | |
Gleb Natapov | 36752c9 | 2009-05-11 13:35:53 +0300 | [diff] [blame] | 6171 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
Gleb Natapov | 14d0bc1 | 2009-04-21 17:45:11 +0300 | [diff] [blame] | 6172 | set_bit(vcpu->arch.interrupt.nr, |
| 6173 | (unsigned long *)sregs->interrupt_bitmap); |
Gleb Natapov | 16d7a19 | 2009-04-21 17:45:10 +0300 | [diff] [blame] | 6174 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6175 | return 0; |
| 6176 | } |
| 6177 | |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 6178 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
| 6179 | struct kvm_mp_state *mp_state) |
| 6180 | { |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 6181 | mp_state->mp_state = vcpu->arch.mp_state; |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 6182 | return 0; |
| 6183 | } |
| 6184 | |
| 6185 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
| 6186 | struct kvm_mp_state *mp_state) |
| 6187 | { |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 6188 | vcpu->arch.mp_state = mp_state->mp_state; |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 6189 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 6190 | return 0; |
| 6191 | } |
| 6192 | |
Kevin Wolf | 7f3d35f | 2012-02-08 14:34:38 +0100 | [diff] [blame] | 6193 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, |
| 6194 | int reason, bool has_error_code, u32 error_code) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6195 | { |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 6196 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
Mohammed Gamal | 8ec4722 | 2010-08-16 00:47:01 +0300 | [diff] [blame] | 6197 | int ret; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6198 | |
Mohammed Gamal | 8ec4722 | 2010-08-16 00:47:01 +0300 | [diff] [blame] | 6199 | init_emulate_ctxt(vcpu); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 6200 | |
Kevin Wolf | 7f3d35f | 2012-02-08 14:34:38 +0100 | [diff] [blame] | 6201 | ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason, |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 6202 | has_error_code, error_code); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 6203 | |
Gleb Natapov | c697518 | 2010-02-18 12:15:01 +0200 | [diff] [blame] | 6204 | if (ret) |
Gleb Natapov | 19d0443 | 2010-04-15 12:29:50 +0300 | [diff] [blame] | 6205 | return EMULATE_FAIL; |
Gleb Natapov | c697518 | 2010-02-18 12:15:01 +0200 | [diff] [blame] | 6206 | |
Takuya Yoshikawa | 9d74191 | 2011-05-29 21:53:48 +0900 | [diff] [blame] | 6207 | kvm_rip_write(vcpu, ctxt->eip); |
| 6208 | kvm_set_rflags(vcpu, ctxt->eflags); |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 6209 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Gleb Natapov | 19d0443 | 2010-04-15 12:29:50 +0300 | [diff] [blame] | 6210 | return EMULATE_DONE; |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 6211 | } |
| 6212 | EXPORT_SYMBOL_GPL(kvm_task_switch); |
| 6213 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6214 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| 6215 | struct kvm_sregs *sregs) |
| 6216 | { |
| 6217 | int mmu_reset_needed = 0; |
Xiao Guangrong | 63f42e0 | 2011-01-12 15:39:18 +0800 | [diff] [blame] | 6218 | int pending_vec, max_bits, idx; |
Gleb Natapov | 89a27f4 | 2010-02-16 10:51:48 +0200 | [diff] [blame] | 6219 | struct desc_ptr dt; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6220 | |
Petr Matousek | 6d1068b | 2012-11-06 19:24:07 +0100 | [diff] [blame] | 6221 | if (!guest_cpuid_has_xsave(vcpu) && (sregs->cr4 & X86_CR4_OSXSAVE)) |
| 6222 | return -EINVAL; |
| 6223 | |
Gleb Natapov | 89a27f4 | 2010-02-16 10:51:48 +0200 | [diff] [blame] | 6224 | dt.size = sregs->idt.limit; |
| 6225 | dt.address = sregs->idt.base; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6226 | kvm_x86_ops->set_idt(vcpu, &dt); |
Gleb Natapov | 89a27f4 | 2010-02-16 10:51:48 +0200 | [diff] [blame] | 6227 | dt.size = sregs->gdt.limit; |
| 6228 | dt.address = sregs->gdt.base; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6229 | kvm_x86_ops->set_gdt(vcpu, &dt); |
| 6230 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 6231 | vcpu->arch.cr2 = sregs->cr2; |
Avi Kivity | 9f8fe50 | 2010-12-05 17:30:00 +0200 | [diff] [blame] | 6232 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
Jan Kiszka | dc7e795 | 2009-07-01 20:52:03 +0200 | [diff] [blame] | 6233 | vcpu->arch.cr3 = sregs->cr3; |
Avi Kivity | aff48ba | 2010-12-05 18:56:11 +0200 | [diff] [blame] | 6234 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6235 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 6236 | kvm_set_cr8(vcpu, sregs->cr8); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6237 | |
Avi Kivity | f6801df | 2010-01-21 15:31:50 +0200 | [diff] [blame] | 6238 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6239 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6240 | kvm_set_apic_base(vcpu, sregs->apic_base); |
| 6241 | |
Avi Kivity | 4d4ec08 | 2009-12-29 18:07:30 +0200 | [diff] [blame] | 6242 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6243 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
Paul Knowles | d730616 | 2008-02-06 11:02:35 +0000 | [diff] [blame] | 6244 | vcpu->arch.cr0 = sregs->cr0; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6245 | |
Avi Kivity | fc78f51 | 2009-12-07 12:16:48 +0200 | [diff] [blame] | 6246 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6247 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
Sheng Yang | 3ea3aa8 | 2010-12-08 10:49:43 +0800 | [diff] [blame] | 6248 | if (sregs->cr4 & X86_CR4_OSXSAVE) |
Avi Kivity | 00b27a3 | 2011-11-23 16:30:32 +0200 | [diff] [blame] | 6249 | kvm_update_cpuid(vcpu); |
Xiao Guangrong | 63f42e0 | 2011-01-12 15:39:18 +0800 | [diff] [blame] | 6250 | |
| 6251 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
Marcelo Tosatti | 7c93be4 | 2009-10-26 16:48:33 -0200 | [diff] [blame] | 6252 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
Avi Kivity | 9f8fe50 | 2010-12-05 17:30:00 +0200 | [diff] [blame] | 6253 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
Marcelo Tosatti | 7c93be4 | 2009-10-26 16:48:33 -0200 | [diff] [blame] | 6254 | mmu_reset_needed = 1; |
| 6255 | } |
Xiao Guangrong | 63f42e0 | 2011-01-12 15:39:18 +0800 | [diff] [blame] | 6256 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6257 | |
| 6258 | if (mmu_reset_needed) |
| 6259 | kvm_mmu_reset_context(vcpu); |
| 6260 | |
Michael S. Tsirkin | a50abc3 | 2012-09-05 20:00:52 +0300 | [diff] [blame] | 6261 | max_bits = KVM_NR_INTERRUPTS; |
Gleb Natapov | 923c61b | 2009-05-11 13:35:48 +0300 | [diff] [blame] | 6262 | pending_vec = find_first_bit( |
| 6263 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); |
| 6264 | if (pending_vec < max_bits) { |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 6265 | kvm_queue_interrupt(vcpu, pending_vec, false); |
Gleb Natapov | 923c61b | 2009-05-11 13:35:48 +0300 | [diff] [blame] | 6266 | pr_debug("Set back pending irq %d\n", pending_vec); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6267 | } |
| 6268 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 6269 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
| 6270 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); |
| 6271 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); |
| 6272 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); |
| 6273 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); |
| 6274 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6275 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 6276 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
| 6277 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6278 | |
Mikhail Ershov | 5f0269f | 2009-08-03 14:58:25 +0300 | [diff] [blame] | 6279 | update_cr8_intercept(vcpu); |
| 6280 | |
Marcelo Tosatti | 9c3e4aa | 2008-09-10 16:40:55 -0300 | [diff] [blame] | 6281 | /* Older userspace won't unhalt the vcpu on reset. */ |
Gleb Natapov | c5af89b | 2009-06-09 15:56:26 +0300 | [diff] [blame] | 6282 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
Marcelo Tosatti | 9c3e4aa | 2008-09-10 16:40:55 -0300 | [diff] [blame] | 6283 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
Avi Kivity | 3eeb328 | 2010-01-21 15:31:48 +0200 | [diff] [blame] | 6284 | !is_protmode(vcpu)) |
Marcelo Tosatti | 9c3e4aa | 2008-09-10 16:40:55 -0300 | [diff] [blame] | 6285 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
| 6286 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 6287 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
| 6288 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6289 | return 0; |
| 6290 | } |
| 6291 | |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 6292 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
| 6293 | struct kvm_guest_debug *dbg) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6294 | { |
Jan Kiszka | 355be0b | 2009-10-03 00:31:21 +0200 | [diff] [blame] | 6295 | unsigned long rflags; |
Jan Kiszka | ae675ef | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 6296 | int i, r; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6297 | |
Jan Kiszka | 4f926bf2 | 2009-10-30 12:46:59 +0100 | [diff] [blame] | 6298 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
| 6299 | r = -EBUSY; |
| 6300 | if (vcpu->arch.exception.pending) |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 6301 | goto out; |
Jan Kiszka | 4f926bf2 | 2009-10-30 12:46:59 +0100 | [diff] [blame] | 6302 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
| 6303 | kvm_queue_exception(vcpu, DB_VECTOR); |
| 6304 | else |
| 6305 | kvm_queue_exception(vcpu, BP_VECTOR); |
| 6306 | } |
| 6307 | |
Jan Kiszka | 91586a3 | 2009-10-05 13:07:21 +0200 | [diff] [blame] | 6308 | /* |
| 6309 | * Read rflags as long as potentially injected trace flags are still |
| 6310 | * filtered out. |
| 6311 | */ |
| 6312 | rflags = kvm_get_rflags(vcpu); |
Jan Kiszka | 355be0b | 2009-10-03 00:31:21 +0200 | [diff] [blame] | 6313 | |
| 6314 | vcpu->guest_debug = dbg->control; |
| 6315 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) |
| 6316 | vcpu->guest_debug = 0; |
| 6317 | |
| 6318 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { |
Jan Kiszka | ae675ef | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 6319 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
| 6320 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; |
Jan Kiszka | c863901 | 2012-09-21 05:42:55 +0200 | [diff] [blame] | 6321 | vcpu->arch.guest_debug_dr7 = dbg->arch.debugreg[7]; |
Jan Kiszka | ae675ef | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 6322 | } else { |
| 6323 | for (i = 0; i < KVM_NR_DB_REGS; i++) |
| 6324 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; |
Jan Kiszka | ae675ef | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 6325 | } |
Jan Kiszka | c863901 | 2012-09-21 05:42:55 +0200 | [diff] [blame] | 6326 | kvm_update_dr7(vcpu); |
Jan Kiszka | ae675ef | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 6327 | |
Jan Kiszka | f92653e | 2010-02-23 17:47:55 +0100 | [diff] [blame] | 6328 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
| 6329 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + |
| 6330 | get_segment_base(vcpu, VCPU_SREG_CS); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6331 | |
Jan Kiszka | 91586a3 | 2009-10-05 13:07:21 +0200 | [diff] [blame] | 6332 | /* |
| 6333 | * Trigger an rflags update that will inject or remove the trace |
| 6334 | * flags. |
| 6335 | */ |
| 6336 | kvm_set_rflags(vcpu, rflags); |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 6337 | |
Jan Kiszka | c863901 | 2012-09-21 05:42:55 +0200 | [diff] [blame] | 6338 | kvm_x86_ops->update_db_bp_intercept(vcpu); |
Jan Kiszka | 355be0b | 2009-10-03 00:31:21 +0200 | [diff] [blame] | 6339 | |
Jan Kiszka | 4f926bf2 | 2009-10-30 12:46:59 +0100 | [diff] [blame] | 6340 | r = 0; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6341 | |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 6342 | out: |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 6343 | |
| 6344 | return r; |
| 6345 | } |
| 6346 | |
| 6347 | /* |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 6348 | * Translate a guest virtual address to a guest physical address. |
| 6349 | */ |
| 6350 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
| 6351 | struct kvm_translation *tr) |
| 6352 | { |
| 6353 | unsigned long vaddr = tr->linear_address; |
| 6354 | gpa_t gpa; |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 6355 | int idx; |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 6356 | |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 6357 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 6358 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 6359 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 6360 | tr->physical_address = gpa; |
| 6361 | tr->valid = gpa != UNMAPPED_GVA; |
| 6362 | tr->writeable = 1; |
| 6363 | tr->usermode = 0; |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 6364 | |
| 6365 | return 0; |
| 6366 | } |
| 6367 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6368 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 6369 | { |
Sheng Yang | 9891883 | 2010-05-17 17:08:28 +0800 | [diff] [blame] | 6370 | struct i387_fxsave_struct *fxsave = |
| 6371 | &vcpu->arch.guest_fpu.state->fxsave; |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6372 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6373 | memcpy(fpu->fpr, fxsave->st_space, 128); |
| 6374 | fpu->fcw = fxsave->cwd; |
| 6375 | fpu->fsw = fxsave->swd; |
| 6376 | fpu->ftwx = fxsave->twd; |
| 6377 | fpu->last_opcode = fxsave->fop; |
| 6378 | fpu->last_ip = fxsave->rip; |
| 6379 | fpu->last_dp = fxsave->rdp; |
| 6380 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); |
| 6381 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6382 | return 0; |
| 6383 | } |
| 6384 | |
| 6385 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 6386 | { |
Sheng Yang | 9891883 | 2010-05-17 17:08:28 +0800 | [diff] [blame] | 6387 | struct i387_fxsave_struct *fxsave = |
| 6388 | &vcpu->arch.guest_fpu.state->fxsave; |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6389 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6390 | memcpy(fxsave->st_space, fpu->fpr, 128); |
| 6391 | fxsave->cwd = fpu->fcw; |
| 6392 | fxsave->swd = fpu->fsw; |
| 6393 | fxsave->twd = fpu->ftwx; |
| 6394 | fxsave->fop = fpu->last_opcode; |
| 6395 | fxsave->rip = fpu->last_ip; |
| 6396 | fxsave->rdp = fpu->last_dp; |
| 6397 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); |
| 6398 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6399 | return 0; |
| 6400 | } |
| 6401 | |
Jan Kiszka | 10ab25c | 2010-05-25 16:01:50 +0200 | [diff] [blame] | 6402 | int fx_init(struct kvm_vcpu *vcpu) |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6403 | { |
Jan Kiszka | 10ab25c | 2010-05-25 16:01:50 +0200 | [diff] [blame] | 6404 | int err; |
| 6405 | |
| 6406 | err = fpu_alloc(&vcpu->arch.guest_fpu); |
| 6407 | if (err) |
| 6408 | return err; |
| 6409 | |
Sheng Yang | 9891883 | 2010-05-17 17:08:28 +0800 | [diff] [blame] | 6410 | fpu_finit(&vcpu->arch.guest_fpu); |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6411 | |
Dexuan Cui | 2acf923 | 2010-06-10 11:27:12 +0800 | [diff] [blame] | 6412 | /* |
| 6413 | * Ensure guest xcr0 is valid for loading |
| 6414 | */ |
| 6415 | vcpu->arch.xcr0 = XSTATE_FP; |
| 6416 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 6417 | vcpu->arch.cr0 |= X86_CR0_ET; |
Jan Kiszka | 10ab25c | 2010-05-25 16:01:50 +0200 | [diff] [blame] | 6418 | |
| 6419 | return 0; |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6420 | } |
| 6421 | EXPORT_SYMBOL_GPL(fx_init); |
| 6422 | |
Sheng Yang | 9891883 | 2010-05-17 17:08:28 +0800 | [diff] [blame] | 6423 | static void fx_free(struct kvm_vcpu *vcpu) |
| 6424 | { |
| 6425 | fpu_free(&vcpu->arch.guest_fpu); |
| 6426 | } |
| 6427 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6428 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
| 6429 | { |
Avi Kivity | 2608d7a | 2010-01-21 15:31:45 +0200 | [diff] [blame] | 6430 | if (vcpu->guest_fpu_loaded) |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6431 | return; |
| 6432 | |
Dexuan Cui | 2acf923 | 2010-06-10 11:27:12 +0800 | [diff] [blame] | 6433 | /* |
| 6434 | * Restore all possible states in the guest, |
| 6435 | * and assume host would use all available bits. |
| 6436 | * Guest xcr0 would be loaded later. |
| 6437 | */ |
| 6438 | kvm_put_guest_xcr0(vcpu); |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6439 | vcpu->guest_fpu_loaded = 1; |
Suresh Siddha | b1a74bf | 2012-09-20 11:01:49 -0700 | [diff] [blame] | 6440 | __kernel_fpu_begin(); |
Sheng Yang | 9891883 | 2010-05-17 17:08:28 +0800 | [diff] [blame] | 6441 | fpu_restore_checking(&vcpu->arch.guest_fpu); |
Avi Kivity | 0c04851 | 2010-01-21 15:31:52 +0200 | [diff] [blame] | 6442 | trace_kvm_fpu(1); |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6443 | } |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6444 | |
| 6445 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) |
| 6446 | { |
Dexuan Cui | 2acf923 | 2010-06-10 11:27:12 +0800 | [diff] [blame] | 6447 | kvm_put_guest_xcr0(vcpu); |
| 6448 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6449 | if (!vcpu->guest_fpu_loaded) |
| 6450 | return; |
| 6451 | |
| 6452 | vcpu->guest_fpu_loaded = 0; |
Sheng Yang | 9891883 | 2010-05-17 17:08:28 +0800 | [diff] [blame] | 6453 | fpu_save_init(&vcpu->arch.guest_fpu); |
Suresh Siddha | b1a74bf | 2012-09-20 11:01:49 -0700 | [diff] [blame] | 6454 | __kernel_fpu_end(); |
Avi Kivity | f096ed8 | 2007-11-18 13:54:33 +0200 | [diff] [blame] | 6455 | ++vcpu->stat.fpu_reload; |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 6456 | kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu); |
Avi Kivity | 0c04851 | 2010-01-21 15:31:52 +0200 | [diff] [blame] | 6457 | trace_kvm_fpu(0); |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 6458 | } |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6459 | |
| 6460 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) |
| 6461 | { |
Glauber Costa | 12f9a48 | 2011-02-01 14:16:40 -0500 | [diff] [blame] | 6462 | kvmclock_reset(vcpu); |
Joerg Roedel | 7f1ea20 | 2009-02-25 16:08:31 +0100 | [diff] [blame] | 6463 | |
Sheng Yang | f5f48ee | 2010-06-30 12:25:15 +0800 | [diff] [blame] | 6464 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
Sheng Yang | 9891883 | 2010-05-17 17:08:28 +0800 | [diff] [blame] | 6465 | fx_free(vcpu); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6466 | kvm_x86_ops->vcpu_free(vcpu); |
| 6467 | } |
| 6468 | |
| 6469 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, |
| 6470 | unsigned int id) |
| 6471 | { |
Zachary Amsden | 6755bae | 2010-08-19 22:07:22 -1000 | [diff] [blame] | 6472 | if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
| 6473 | printk_once(KERN_WARNING |
| 6474 | "kvm: SMP vm created on host with unstable TSC; " |
| 6475 | "guest TSC will not be reliable\n"); |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 6476 | return kvm_x86_ops->vcpu_create(kvm, id); |
| 6477 | } |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6478 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 6479 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
| 6480 | { |
| 6481 | int r; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6482 | |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 6483 | vcpu->arch.mtrr_state.have_fixed = 1; |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 6484 | r = vcpu_load(vcpu); |
| 6485 | if (r) |
| 6486 | return r; |
Jan Kiszka | 57f252f | 2013-03-12 10:20:24 +0100 | [diff] [blame^] | 6487 | kvm_vcpu_reset(vcpu); |
| 6488 | r = kvm_mmu_setup(vcpu); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6489 | vcpu_put(vcpu); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6490 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 6491 | return r; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6492 | } |
| 6493 | |
Marcelo Tosatti | 42897d8 | 2012-11-27 23:29:02 -0200 | [diff] [blame] | 6494 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
| 6495 | { |
| 6496 | int r; |
Will Auld | 8fe8ab4 | 2012-11-29 12:42:12 -0800 | [diff] [blame] | 6497 | struct msr_data msr; |
Marcelo Tosatti | 42897d8 | 2012-11-27 23:29:02 -0200 | [diff] [blame] | 6498 | |
| 6499 | r = vcpu_load(vcpu); |
| 6500 | if (r) |
| 6501 | return r; |
Will Auld | 8fe8ab4 | 2012-11-29 12:42:12 -0800 | [diff] [blame] | 6502 | msr.data = 0x0; |
| 6503 | msr.index = MSR_IA32_TSC; |
| 6504 | msr.host_initiated = true; |
| 6505 | kvm_write_tsc(vcpu, &msr); |
Marcelo Tosatti | 42897d8 | 2012-11-27 23:29:02 -0200 | [diff] [blame] | 6506 | vcpu_put(vcpu); |
| 6507 | |
| 6508 | return r; |
| 6509 | } |
| 6510 | |
Hollis Blanchard | d40ccc6 | 2007-11-19 14:04:43 -0600 | [diff] [blame] | 6511 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6512 | { |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 6513 | int r; |
Gleb Natapov | 344d958 | 2010-10-14 11:22:50 +0200 | [diff] [blame] | 6514 | vcpu->arch.apf.msr_val = 0; |
| 6515 | |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 6516 | r = vcpu_load(vcpu); |
| 6517 | BUG_ON(r); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6518 | kvm_mmu_unload(vcpu); |
| 6519 | vcpu_put(vcpu); |
| 6520 | |
Sheng Yang | 9891883 | 2010-05-17 17:08:28 +0800 | [diff] [blame] | 6521 | fx_free(vcpu); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6522 | kvm_x86_ops->vcpu_free(vcpu); |
| 6523 | } |
| 6524 | |
Jan Kiszka | 57f252f | 2013-03-12 10:20:24 +0100 | [diff] [blame^] | 6525 | static void kvm_vcpu_reset(struct kvm_vcpu *vcpu) |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6526 | { |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 6527 | atomic_set(&vcpu->arch.nmi_queued, 0); |
| 6528 | vcpu->arch.nmi_pending = 0; |
Jan Kiszka | 448fa4a | 2008-09-26 09:30:48 +0200 | [diff] [blame] | 6529 | vcpu->arch.nmi_injected = false; |
| 6530 | |
Jan Kiszka | 42dbaa5 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 6531 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
| 6532 | vcpu->arch.dr6 = DR6_FIXED_1; |
| 6533 | vcpu->arch.dr7 = DR7_FIXED_1; |
Jan Kiszka | c863901 | 2012-09-21 05:42:55 +0200 | [diff] [blame] | 6534 | kvm_update_dr7(vcpu); |
Jan Kiszka | 42dbaa5 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 6535 | |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 6536 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Gleb Natapov | 344d958 | 2010-10-14 11:22:50 +0200 | [diff] [blame] | 6537 | vcpu->arch.apf.msr_val = 0; |
Glauber Costa | c9aaa89 | 2011-07-11 15:28:14 -0400 | [diff] [blame] | 6538 | vcpu->arch.st.msr_val = 0; |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 6539 | |
Glauber Costa | 12f9a48 | 2011-02-01 14:16:40 -0500 | [diff] [blame] | 6540 | kvmclock_reset(vcpu); |
| 6541 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 6542 | kvm_clear_async_pf_completion_queue(vcpu); |
| 6543 | kvm_async_pf_hash_reset(vcpu); |
| 6544 | vcpu->arch.apf.halted = false; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6545 | |
Gleb Natapov | f5132b0 | 2011-11-10 14:57:22 +0200 | [diff] [blame] | 6546 | kvm_pmu_reset(vcpu); |
| 6547 | |
Julian Stecklina | 66f7b72 | 2012-12-05 15:26:19 +0100 | [diff] [blame] | 6548 | memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs)); |
| 6549 | vcpu->arch.regs_avail = ~0; |
| 6550 | vcpu->arch.regs_dirty = ~0; |
| 6551 | |
Jan Kiszka | 57f252f | 2013-03-12 10:20:24 +0100 | [diff] [blame^] | 6552 | kvm_x86_ops->vcpu_reset(vcpu); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6553 | } |
| 6554 | |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 6555 | int kvm_arch_hardware_enable(void *garbage) |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6556 | { |
Zachary Amsden | ca84d1a | 2010-08-19 22:07:28 -1000 | [diff] [blame] | 6557 | struct kvm *kvm; |
| 6558 | struct kvm_vcpu *vcpu; |
| 6559 | int i; |
Zachary Amsden | 0dd6a6e | 2012-02-03 15:43:56 -0200 | [diff] [blame] | 6560 | int ret; |
| 6561 | u64 local_tsc; |
| 6562 | u64 max_tsc = 0; |
| 6563 | bool stable, backwards_tsc = false; |
Avi Kivity | 18863bd | 2009-09-07 11:12:18 +0300 | [diff] [blame] | 6564 | |
| 6565 | kvm_shared_msr_cpu_online(); |
Zachary Amsden | 0dd6a6e | 2012-02-03 15:43:56 -0200 | [diff] [blame] | 6566 | ret = kvm_x86_ops->hardware_enable(garbage); |
| 6567 | if (ret != 0) |
| 6568 | return ret; |
| 6569 | |
| 6570 | local_tsc = native_read_tsc(); |
| 6571 | stable = !check_tsc_unstable(); |
| 6572 | list_for_each_entry(kvm, &vm_list, vm_list) { |
| 6573 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 6574 | if (!stable && vcpu->cpu == smp_processor_id()) |
| 6575 | set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); |
| 6576 | if (stable && vcpu->arch.last_host_tsc > local_tsc) { |
| 6577 | backwards_tsc = true; |
| 6578 | if (vcpu->arch.last_host_tsc > max_tsc) |
| 6579 | max_tsc = vcpu->arch.last_host_tsc; |
| 6580 | } |
| 6581 | } |
| 6582 | } |
| 6583 | |
| 6584 | /* |
| 6585 | * Sometimes, even reliable TSCs go backwards. This happens on |
| 6586 | * platforms that reset TSC during suspend or hibernate actions, but |
| 6587 | * maintain synchronization. We must compensate. Fortunately, we can |
| 6588 | * detect that condition here, which happens early in CPU bringup, |
| 6589 | * before any KVM threads can be running. Unfortunately, we can't |
| 6590 | * bring the TSCs fully up to date with real time, as we aren't yet far |
| 6591 | * enough into CPU bringup that we know how much real time has actually |
| 6592 | * elapsed; our helper function, get_kernel_ns() will be using boot |
| 6593 | * variables that haven't been updated yet. |
| 6594 | * |
| 6595 | * So we simply find the maximum observed TSC above, then record the |
| 6596 | * adjustment to TSC in each VCPU. When the VCPU later gets loaded, |
| 6597 | * the adjustment will be applied. Note that we accumulate |
| 6598 | * adjustments, in case multiple suspend cycles happen before some VCPU |
| 6599 | * gets a chance to run again. In the event that no KVM threads get a |
| 6600 | * chance to run, we will miss the entire elapsed period, as we'll have |
| 6601 | * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may |
| 6602 | * loose cycle time. This isn't too big a deal, since the loss will be |
| 6603 | * uniform across all VCPUs (not to mention the scenario is extremely |
| 6604 | * unlikely). It is possible that a second hibernate recovery happens |
| 6605 | * much faster than a first, causing the observed TSC here to be |
| 6606 | * smaller; this would require additional padding adjustment, which is |
| 6607 | * why we set last_host_tsc to the local tsc observed here. |
| 6608 | * |
| 6609 | * N.B. - this code below runs only on platforms with reliable TSC, |
| 6610 | * as that is the only way backwards_tsc is set above. Also note |
| 6611 | * that this runs for ALL vcpus, which is not a bug; all VCPUs should |
| 6612 | * have the same delta_cyc adjustment applied if backwards_tsc |
| 6613 | * is detected. Note further, this adjustment is only done once, |
| 6614 | * as we reset last_host_tsc on all VCPUs to stop this from being |
| 6615 | * called multiple times (one for each physical CPU bringup). |
| 6616 | * |
Guo Chao | 4a96998 | 2012-06-28 15:17:27 +0800 | [diff] [blame] | 6617 | * Platforms with unreliable TSCs don't have to deal with this, they |
Zachary Amsden | 0dd6a6e | 2012-02-03 15:43:56 -0200 | [diff] [blame] | 6618 | * will be compensated by the logic in vcpu_load, which sets the TSC to |
| 6619 | * catchup mode. This will catchup all VCPUs to real time, but cannot |
| 6620 | * guarantee that they stay in perfect synchronization. |
| 6621 | */ |
| 6622 | if (backwards_tsc) { |
| 6623 | u64 delta_cyc = max_tsc - local_tsc; |
| 6624 | list_for_each_entry(kvm, &vm_list, vm_list) { |
| 6625 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 6626 | vcpu->arch.tsc_offset_adjustment += delta_cyc; |
| 6627 | vcpu->arch.last_host_tsc = local_tsc; |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 6628 | set_bit(KVM_REQ_MASTERCLOCK_UPDATE, |
| 6629 | &vcpu->requests); |
Zachary Amsden | 0dd6a6e | 2012-02-03 15:43:56 -0200 | [diff] [blame] | 6630 | } |
| 6631 | |
| 6632 | /* |
| 6633 | * We have to disable TSC offset matching.. if you were |
| 6634 | * booting a VM while issuing an S4 host suspend.... |
| 6635 | * you may have some problem. Solving this issue is |
| 6636 | * left as an exercise to the reader. |
| 6637 | */ |
| 6638 | kvm->arch.last_tsc_nsec = 0; |
| 6639 | kvm->arch.last_tsc_write = 0; |
| 6640 | } |
| 6641 | |
| 6642 | } |
| 6643 | return 0; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6644 | } |
| 6645 | |
| 6646 | void kvm_arch_hardware_disable(void *garbage) |
| 6647 | { |
| 6648 | kvm_x86_ops->hardware_disable(garbage); |
Avi Kivity | 3548bab | 2009-11-28 14:18:47 +0200 | [diff] [blame] | 6649 | drop_user_return_notifiers(garbage); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6650 | } |
| 6651 | |
| 6652 | int kvm_arch_hardware_setup(void) |
| 6653 | { |
| 6654 | return kvm_x86_ops->hardware_setup(); |
| 6655 | } |
| 6656 | |
| 6657 | void kvm_arch_hardware_unsetup(void) |
| 6658 | { |
| 6659 | kvm_x86_ops->hardware_unsetup(); |
| 6660 | } |
| 6661 | |
| 6662 | void kvm_arch_check_processor_compat(void *rtn) |
| 6663 | { |
| 6664 | kvm_x86_ops->check_processor_compatibility(rtn); |
| 6665 | } |
| 6666 | |
Avi Kivity | 3e51570 | 2012-03-05 14:23:29 +0200 | [diff] [blame] | 6667 | bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) |
| 6668 | { |
| 6669 | return irqchip_in_kernel(vcpu->kvm) == (vcpu->arch.apic != NULL); |
| 6670 | } |
| 6671 | |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 6672 | struct static_key kvm_no_apic_vcpu __read_mostly; |
| 6673 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6674 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
| 6675 | { |
| 6676 | struct page *page; |
| 6677 | struct kvm *kvm; |
| 6678 | int r; |
| 6679 | |
| 6680 | BUG_ON(vcpu->kvm == NULL); |
| 6681 | kvm = vcpu->kvm; |
| 6682 | |
Avi Kivity | 9aabc88f | 2010-07-29 15:11:50 +0300 | [diff] [blame] | 6683 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
Gleb Natapov | c5af89b | 2009-06-09 15:56:26 +0300 | [diff] [blame] | 6684 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 6685 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6686 | else |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 6687 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6688 | |
| 6689 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 6690 | if (!page) { |
| 6691 | r = -ENOMEM; |
| 6692 | goto fail; |
| 6693 | } |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 6694 | vcpu->arch.pio_data = page_address(page); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6695 | |
Zachary Amsden | cc57828 | 2012-02-03 15:43:50 -0200 | [diff] [blame] | 6696 | kvm_set_tsc_khz(vcpu, max_tsc_khz); |
Zachary Amsden | c285545 | 2010-09-18 14:38:15 -1000 | [diff] [blame] | 6697 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6698 | r = kvm_mmu_create(vcpu); |
| 6699 | if (r < 0) |
| 6700 | goto fail_free_pio_data; |
| 6701 | |
| 6702 | if (irqchip_in_kernel(kvm)) { |
| 6703 | r = kvm_create_lapic(vcpu); |
| 6704 | if (r < 0) |
| 6705 | goto fail_mmu_destroy; |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 6706 | } else |
| 6707 | static_key_slow_inc(&kvm_no_apic_vcpu); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6708 | |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 6709 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
| 6710 | GFP_KERNEL); |
| 6711 | if (!vcpu->arch.mce_banks) { |
| 6712 | r = -ENOMEM; |
Wei Yongjun | 443c39b | 2010-01-22 14:21:29 +0800 | [diff] [blame] | 6713 | goto fail_free_lapic; |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame] | 6714 | } |
| 6715 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; |
| 6716 | |
Sheng Yang | f5f48ee | 2010-06-30 12:25:15 +0800 | [diff] [blame] | 6717 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) |
| 6718 | goto fail_free_mce_banks; |
| 6719 | |
Julian Stecklina | 66f7b72 | 2012-12-05 15:26:19 +0100 | [diff] [blame] | 6720 | r = fx_init(vcpu); |
| 6721 | if (r) |
| 6722 | goto fail_free_wbinvd_dirty_mask; |
| 6723 | |
Will Auld | ba90463 | 2012-11-29 12:42:50 -0800 | [diff] [blame] | 6724 | vcpu->arch.ia32_tsc_adjust_msr = 0x0; |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 6725 | kvm_async_pf_hash_reset(vcpu); |
Gleb Natapov | f5132b0 | 2011-11-10 14:57:22 +0200 | [diff] [blame] | 6726 | kvm_pmu_init(vcpu); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 6727 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6728 | return 0; |
Julian Stecklina | 66f7b72 | 2012-12-05 15:26:19 +0100 | [diff] [blame] | 6729 | fail_free_wbinvd_dirty_mask: |
| 6730 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
Sheng Yang | f5f48ee | 2010-06-30 12:25:15 +0800 | [diff] [blame] | 6731 | fail_free_mce_banks: |
| 6732 | kfree(vcpu->arch.mce_banks); |
Wei Yongjun | 443c39b | 2010-01-22 14:21:29 +0800 | [diff] [blame] | 6733 | fail_free_lapic: |
| 6734 | kvm_free_lapic(vcpu); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6735 | fail_mmu_destroy: |
| 6736 | kvm_mmu_destroy(vcpu); |
| 6737 | fail_free_pio_data: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 6738 | free_page((unsigned long)vcpu->arch.pio_data); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6739 | fail: |
| 6740 | return r; |
| 6741 | } |
| 6742 | |
| 6743 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 6744 | { |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 6745 | int idx; |
| 6746 | |
Gleb Natapov | f5132b0 | 2011-11-10 14:57:22 +0200 | [diff] [blame] | 6747 | kvm_pmu_destroy(vcpu); |
Wei Yongjun | 36cb93f | 2010-01-22 14:18:47 +0800 | [diff] [blame] | 6748 | kfree(vcpu->arch.mce_banks); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6749 | kvm_free_lapic(vcpu); |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 6750 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6751 | kvm_mmu_destroy(vcpu); |
Marcelo Tosatti | f656ce0 | 2009-12-23 14:35:25 -0200 | [diff] [blame] | 6752 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 6753 | free_page((unsigned long)vcpu->arch.pio_data); |
Gleb Natapov | 54e9818 | 2012-08-05 15:58:32 +0300 | [diff] [blame] | 6754 | if (!irqchip_in_kernel(vcpu->kvm)) |
| 6755 | static_key_slow_dec(&kvm_no_apic_vcpu); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 6756 | } |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 6757 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 6758 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 6759 | { |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 6760 | if (type) |
| 6761 | return -EINVAL; |
| 6762 | |
Zhang Xiantao | f05e70a | 2007-12-14 10:01:48 +0800 | [diff] [blame] | 6763 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
Ben-Ami Yassour | 4d5c5d0 | 2008-07-28 19:26:26 +0300 | [diff] [blame] | 6764 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 6765 | |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 6766 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
| 6767 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); |
Alex Williamson | 7a84428 | 2012-09-21 11:58:03 -0600 | [diff] [blame] | 6768 | /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */ |
| 6769 | set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, |
| 6770 | &kvm->arch.irq_sources_bitmap); |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 6771 | |
Jan Kiszka | 038f8c1 | 2011-02-04 10:49:11 +0100 | [diff] [blame] | 6772 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 6773 | mutex_init(&kvm->arch.apic_map_lock); |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 6774 | spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock); |
| 6775 | |
| 6776 | pvclock_update_vm_gtod_copy(kvm); |
Marcelo Tosatti | 53f658b3 | 2008-12-11 20:45:05 +0100 | [diff] [blame] | 6777 | |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 6778 | return 0; |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 6779 | } |
| 6780 | |
| 6781 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) |
| 6782 | { |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 6783 | int r; |
| 6784 | r = vcpu_load(vcpu); |
| 6785 | BUG_ON(r); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 6786 | kvm_mmu_unload(vcpu); |
| 6787 | vcpu_put(vcpu); |
| 6788 | } |
| 6789 | |
| 6790 | static void kvm_free_vcpus(struct kvm *kvm) |
| 6791 | { |
| 6792 | unsigned int i; |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 6793 | struct kvm_vcpu *vcpu; |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 6794 | |
| 6795 | /* |
| 6796 | * Unpin any mmu pages first. |
| 6797 | */ |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 6798 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 6799 | kvm_clear_async_pf_completion_queue(vcpu); |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 6800 | kvm_unload_vcpu_mmu(vcpu); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 6801 | } |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 6802 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 6803 | kvm_arch_vcpu_free(vcpu); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 6804 | |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 6805 | mutex_lock(&kvm->lock); |
| 6806 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) |
| 6807 | kvm->vcpus[i] = NULL; |
| 6808 | |
| 6809 | atomic_set(&kvm->online_vcpus, 0); |
| 6810 | mutex_unlock(&kvm->lock); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 6811 | } |
| 6812 | |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 6813 | void kvm_arch_sync_events(struct kvm *kvm) |
| 6814 | { |
Sheng Yang | ba4cef3 | 2009-01-06 10:03:03 +0800 | [diff] [blame] | 6815 | kvm_free_all_assigned_devices(kvm); |
Xiao Guangrong | aea924f | 2010-07-10 17:37:56 +0800 | [diff] [blame] | 6816 | kvm_free_pit(kvm); |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 6817 | } |
| 6818 | |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 6819 | void kvm_arch_destroy_vm(struct kvm *kvm) |
| 6820 | { |
Sheng Yang | 6eb5581 | 2008-10-31 12:37:41 +0800 | [diff] [blame] | 6821 | kvm_iommu_unmap_guest(kvm); |
Zhang Xiantao | d7deeeb0 | 2007-12-14 10:17:34 +0800 | [diff] [blame] | 6822 | kfree(kvm->arch.vpic); |
| 6823 | kfree(kvm->arch.vioapic); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 6824 | kvm_free_vcpus(kvm); |
Avi Kivity | 3d45830 | 2008-03-25 11:26:13 +0200 | [diff] [blame] | 6825 | if (kvm->arch.apic_access_page) |
| 6826 | put_page(kvm->arch.apic_access_page); |
Sheng Yang | b7ebfb0 | 2008-04-25 21:44:52 +0800 | [diff] [blame] | 6827 | if (kvm->arch.ept_identity_pagetable) |
| 6828 | put_page(kvm->arch.ept_identity_pagetable); |
Gleb Natapov | 1e08ec4 | 2012-09-13 17:19:24 +0300 | [diff] [blame] | 6829 | kfree(rcu_dereference_check(kvm->arch.apic_map, 1)); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 6830 | } |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 6831 | |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 6832 | void kvm_arch_free_memslot(struct kvm_memory_slot *free, |
| 6833 | struct kvm_memory_slot *dont) |
| 6834 | { |
| 6835 | int i; |
| 6836 | |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 6837 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
| 6838 | if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) { |
| 6839 | kvm_kvfree(free->arch.rmap[i]); |
| 6840 | free->arch.rmap[i] = NULL; |
Takuya Yoshikawa | 77d1130 | 2012-07-02 17:57:17 +0900 | [diff] [blame] | 6841 | } |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 6842 | if (i == 0) |
| 6843 | continue; |
| 6844 | |
| 6845 | if (!dont || free->arch.lpage_info[i - 1] != |
| 6846 | dont->arch.lpage_info[i - 1]) { |
| 6847 | kvm_kvfree(free->arch.lpage_info[i - 1]); |
| 6848 | free->arch.lpage_info[i - 1] = NULL; |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 6849 | } |
| 6850 | } |
| 6851 | } |
| 6852 | |
| 6853 | int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) |
| 6854 | { |
| 6855 | int i; |
| 6856 | |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 6857 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 6858 | unsigned long ugfn; |
| 6859 | int lpages; |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 6860 | int level = i + 1; |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 6861 | |
| 6862 | lpages = gfn_to_index(slot->base_gfn + npages - 1, |
| 6863 | slot->base_gfn, level) + 1; |
| 6864 | |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 6865 | slot->arch.rmap[i] = |
| 6866 | kvm_kvzalloc(lpages * sizeof(*slot->arch.rmap[i])); |
| 6867 | if (!slot->arch.rmap[i]) |
Takuya Yoshikawa | 77d1130 | 2012-07-02 17:57:17 +0900 | [diff] [blame] | 6868 | goto out_free; |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 6869 | if (i == 0) |
| 6870 | continue; |
Takuya Yoshikawa | 77d1130 | 2012-07-02 17:57:17 +0900 | [diff] [blame] | 6871 | |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 6872 | slot->arch.lpage_info[i - 1] = kvm_kvzalloc(lpages * |
| 6873 | sizeof(*slot->arch.lpage_info[i - 1])); |
| 6874 | if (!slot->arch.lpage_info[i - 1]) |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 6875 | goto out_free; |
| 6876 | |
| 6877 | if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1)) |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 6878 | slot->arch.lpage_info[i - 1][0].write_count = 1; |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 6879 | if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1)) |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 6880 | slot->arch.lpage_info[i - 1][lpages - 1].write_count = 1; |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 6881 | ugfn = slot->userspace_addr >> PAGE_SHIFT; |
| 6882 | /* |
| 6883 | * If the gfn and userspace address are not aligned wrt each |
| 6884 | * other, or if explicitly asked to, disable large page |
| 6885 | * support for this slot |
| 6886 | */ |
| 6887 | if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || |
| 6888 | !kvm_largepages_enabled()) { |
| 6889 | unsigned long j; |
| 6890 | |
| 6891 | for (j = 0; j < lpages; ++j) |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 6892 | slot->arch.lpage_info[i - 1][j].write_count = 1; |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 6893 | } |
| 6894 | } |
| 6895 | |
| 6896 | return 0; |
| 6897 | |
| 6898 | out_free: |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 6899 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
| 6900 | kvm_kvfree(slot->arch.rmap[i]); |
| 6901 | slot->arch.rmap[i] = NULL; |
| 6902 | if (i == 0) |
| 6903 | continue; |
| 6904 | |
| 6905 | kvm_kvfree(slot->arch.lpage_info[i - 1]); |
| 6906 | slot->arch.lpage_info[i - 1] = NULL; |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 6907 | } |
| 6908 | return -ENOMEM; |
| 6909 | } |
| 6910 | |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 6911 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
| 6912 | struct kvm_memory_slot *memslot, |
Takuya Yoshikawa | 7b6195a | 2013-02-27 19:44:34 +0900 | [diff] [blame] | 6913 | struct kvm_userspace_memory_region *mem, |
| 6914 | enum kvm_mr_change change) |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 6915 | { |
Takuya Yoshikawa | 7a905b1 | 2013-02-07 18:55:57 +0900 | [diff] [blame] | 6916 | /* |
| 6917 | * Only private memory slots need to be mapped here since |
| 6918 | * KVM_SET_MEMORY_REGION ioctl is no longer supported. |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 6919 | */ |
Takuya Yoshikawa | 7b6195a | 2013-02-27 19:44:34 +0900 | [diff] [blame] | 6920 | if ((memslot->id >= KVM_USER_MEM_SLOTS) && (change == KVM_MR_CREATE)) { |
Takuya Yoshikawa | 7a905b1 | 2013-02-07 18:55:57 +0900 | [diff] [blame] | 6921 | unsigned long userspace_addr; |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 6922 | |
Takuya Yoshikawa | 7a905b1 | 2013-02-07 18:55:57 +0900 | [diff] [blame] | 6923 | /* |
| 6924 | * MAP_SHARED to prevent internal slot pages from being moved |
| 6925 | * by fork()/COW. |
| 6926 | */ |
Takuya Yoshikawa | 7b6195a | 2013-02-27 19:44:34 +0900 | [diff] [blame] | 6927 | userspace_addr = vm_mmap(NULL, 0, memslot->npages * PAGE_SIZE, |
Takuya Yoshikawa | 7a905b1 | 2013-02-07 18:55:57 +0900 | [diff] [blame] | 6928 | PROT_READ | PROT_WRITE, |
| 6929 | MAP_SHARED | MAP_ANONYMOUS, 0); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 6930 | |
Takuya Yoshikawa | 7a905b1 | 2013-02-07 18:55:57 +0900 | [diff] [blame] | 6931 | if (IS_ERR((void *)userspace_addr)) |
| 6932 | return PTR_ERR((void *)userspace_addr); |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 6933 | |
Takuya Yoshikawa | 7a905b1 | 2013-02-07 18:55:57 +0900 | [diff] [blame] | 6934 | memslot->userspace_addr = userspace_addr; |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 6935 | } |
| 6936 | |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 6937 | return 0; |
| 6938 | } |
| 6939 | |
| 6940 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
| 6941 | struct kvm_userspace_memory_region *mem, |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 6942 | const struct kvm_memory_slot *old, |
| 6943 | enum kvm_mr_change change) |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 6944 | { |
| 6945 | |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 6946 | int nr_mmu_pages = 0; |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 6947 | |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 6948 | if ((mem->slot >= KVM_USER_MEM_SLOTS) && (change == KVM_MR_DELETE)) { |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 6949 | int ret; |
| 6950 | |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 6951 | ret = vm_munmap(old->userspace_addr, |
| 6952 | old->npages * PAGE_SIZE); |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 6953 | if (ret < 0) |
| 6954 | printk(KERN_WARNING |
| 6955 | "kvm_vm_ioctl_set_memory_region: " |
| 6956 | "failed to munmap memory\n"); |
| 6957 | } |
| 6958 | |
Xiao Guangrong | 48c0e4e | 2011-03-04 18:59:21 +0800 | [diff] [blame] | 6959 | if (!kvm->arch.n_requested_mmu_pages) |
| 6960 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 6961 | |
Xiao Guangrong | 48c0e4e | 2011-03-04 18:59:21 +0800 | [diff] [blame] | 6962 | if (nr_mmu_pages) |
| 6963 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
Takuya Yoshikawa | c972f3b | 2013-01-08 19:43:28 +0900 | [diff] [blame] | 6964 | /* |
| 6965 | * Write protect all pages for dirty logging. |
| 6966 | * Existing largepage mappings are destroyed here and new ones will |
| 6967 | * not be created until the end of the logging. |
| 6968 | */ |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 6969 | if ((change != KVM_MR_DELETE) && (mem->flags & KVM_MEM_LOG_DIRTY_PAGES)) |
Takuya Yoshikawa | c972f3b | 2013-01-08 19:43:28 +0900 | [diff] [blame] | 6970 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
Marcelo Tosatti | 3b4dc3a | 2012-08-28 17:43:26 -0300 | [diff] [blame] | 6971 | /* |
| 6972 | * If memory slot is created, or moved, we need to clear all |
| 6973 | * mmio sptes. |
| 6974 | */ |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 6975 | if ((change == KVM_MR_CREATE) || (change == KVM_MR_MOVE)) { |
Marcelo Tosatti | 3b4dc3a | 2012-08-28 17:43:26 -0300 | [diff] [blame] | 6976 | kvm_mmu_zap_all(kvm); |
| 6977 | kvm_reload_remote_mmus(kvm); |
| 6978 | } |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 6979 | } |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 6980 | |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 6981 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 6982 | { |
| 6983 | kvm_mmu_zap_all(kvm); |
Marcelo Tosatti | 8986ecc | 2009-05-12 18:55:45 -0300 | [diff] [blame] | 6984 | kvm_reload_remote_mmus(kvm); |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 6985 | } |
| 6986 | |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 6987 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
| 6988 | struct kvm_memory_slot *slot) |
| 6989 | { |
| 6990 | kvm_arch_flush_shadow_all(kvm); |
| 6991 | } |
| 6992 | |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 6993 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
| 6994 | { |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 6995 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
| 6996 | !vcpu->arch.apf.halted) |
| 6997 | || !list_empty_careful(&vcpu->async_pf.done) |
Gleb Natapov | a1b3710 | 2009-07-09 15:33:52 +0300 | [diff] [blame] | 6998 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
Avi Kivity | 7460fb4a | 2011-09-20 13:43:14 +0300 | [diff] [blame] | 6999 | || atomic_read(&vcpu->arch.nmi_queued) || |
Gleb Natapov | a1b3710 | 2009-07-09 15:33:52 +0300 | [diff] [blame] | 7000 | (kvm_arch_interrupt_allowed(vcpu) && |
| 7001 | kvm_cpu_has_interrupt(vcpu)); |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 7002 | } |
Zhang Xiantao | 5736199 | 2007-12-17 14:21:40 +0800 | [diff] [blame] | 7003 | |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 7004 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
Zhang Xiantao | 5736199 | 2007-12-17 14:21:40 +0800 | [diff] [blame] | 7005 | { |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 7006 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; |
Zhang Xiantao | 5736199 | 2007-12-17 14:21:40 +0800 | [diff] [blame] | 7007 | } |
Gleb Natapov | 7864612 | 2009-03-23 12:12:11 +0200 | [diff] [blame] | 7008 | |
| 7009 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) |
| 7010 | { |
| 7011 | return kvm_x86_ops->interrupt_allowed(vcpu); |
| 7012 | } |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 7013 | |
Jan Kiszka | f92653e | 2010-02-23 17:47:55 +0100 | [diff] [blame] | 7014 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
| 7015 | { |
| 7016 | unsigned long current_rip = kvm_rip_read(vcpu) + |
| 7017 | get_segment_base(vcpu, VCPU_SREG_CS); |
| 7018 | |
| 7019 | return current_rip == linear_rip; |
| 7020 | } |
| 7021 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); |
| 7022 | |
Jan Kiszka | 94fe45d | 2009-10-18 13:24:44 +0200 | [diff] [blame] | 7023 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
| 7024 | { |
| 7025 | unsigned long rflags; |
| 7026 | |
| 7027 | rflags = kvm_x86_ops->get_rflags(vcpu); |
| 7028 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
Jan Kiszka | c310bac | 2010-02-23 17:47:58 +0100 | [diff] [blame] | 7029 | rflags &= ~X86_EFLAGS_TF; |
Jan Kiszka | 94fe45d | 2009-10-18 13:24:44 +0200 | [diff] [blame] | 7030 | return rflags; |
| 7031 | } |
| 7032 | EXPORT_SYMBOL_GPL(kvm_get_rflags); |
| 7033 | |
| 7034 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
| 7035 | { |
| 7036 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && |
Jan Kiszka | f92653e | 2010-02-23 17:47:55 +0100 | [diff] [blame] | 7037 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
Jan Kiszka | c310bac | 2010-02-23 17:47:58 +0100 | [diff] [blame] | 7038 | rflags |= X86_EFLAGS_TF; |
Jan Kiszka | 94fe45d | 2009-10-18 13:24:44 +0200 | [diff] [blame] | 7039 | kvm_x86_ops->set_rflags(vcpu, rflags); |
Avi Kivity | 3842d13 | 2010-07-27 12:30:24 +0300 | [diff] [blame] | 7040 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
Jan Kiszka | 94fe45d | 2009-10-18 13:24:44 +0200 | [diff] [blame] | 7041 | } |
| 7042 | EXPORT_SYMBOL_GPL(kvm_set_rflags); |
| 7043 | |
Gleb Natapov | 56028d0 | 2010-10-17 18:13:42 +0200 | [diff] [blame] | 7044 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
| 7045 | { |
| 7046 | int r; |
| 7047 | |
Xiao Guangrong | fb67e14 | 2010-12-07 10:35:25 +0800 | [diff] [blame] | 7048 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
Xiao Guangrong | c4806ac | 2010-11-12 14:49:55 +0800 | [diff] [blame] | 7049 | is_error_page(work->page)) |
Gleb Natapov | 56028d0 | 2010-10-17 18:13:42 +0200 | [diff] [blame] | 7050 | return; |
| 7051 | |
| 7052 | r = kvm_mmu_reload(vcpu); |
| 7053 | if (unlikely(r)) |
| 7054 | return; |
| 7055 | |
Xiao Guangrong | fb67e14 | 2010-12-07 10:35:25 +0800 | [diff] [blame] | 7056 | if (!vcpu->arch.mmu.direct_map && |
| 7057 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) |
| 7058 | return; |
| 7059 | |
Gleb Natapov | 56028d0 | 2010-10-17 18:13:42 +0200 | [diff] [blame] | 7060 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
| 7061 | } |
| 7062 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 7063 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
| 7064 | { |
| 7065 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); |
| 7066 | } |
| 7067 | |
| 7068 | static inline u32 kvm_async_pf_next_probe(u32 key) |
| 7069 | { |
| 7070 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); |
| 7071 | } |
| 7072 | |
| 7073 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) |
| 7074 | { |
| 7075 | u32 key = kvm_async_pf_hash_fn(gfn); |
| 7076 | |
| 7077 | while (vcpu->arch.apf.gfns[key] != ~0) |
| 7078 | key = kvm_async_pf_next_probe(key); |
| 7079 | |
| 7080 | vcpu->arch.apf.gfns[key] = gfn; |
| 7081 | } |
| 7082 | |
| 7083 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) |
| 7084 | { |
| 7085 | int i; |
| 7086 | u32 key = kvm_async_pf_hash_fn(gfn); |
| 7087 | |
| 7088 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && |
Xiao Guangrong | c7d28c2 | 2010-11-01 17:00:30 +0800 | [diff] [blame] | 7089 | (vcpu->arch.apf.gfns[key] != gfn && |
| 7090 | vcpu->arch.apf.gfns[key] != ~0); i++) |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 7091 | key = kvm_async_pf_next_probe(key); |
| 7092 | |
| 7093 | return key; |
| 7094 | } |
| 7095 | |
| 7096 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) |
| 7097 | { |
| 7098 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; |
| 7099 | } |
| 7100 | |
| 7101 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) |
| 7102 | { |
| 7103 | u32 i, j, k; |
| 7104 | |
| 7105 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); |
| 7106 | while (true) { |
| 7107 | vcpu->arch.apf.gfns[i] = ~0; |
| 7108 | do { |
| 7109 | j = kvm_async_pf_next_probe(j); |
| 7110 | if (vcpu->arch.apf.gfns[j] == ~0) |
| 7111 | return; |
| 7112 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); |
| 7113 | /* |
| 7114 | * k lies cyclically in ]i,j] |
| 7115 | * | i.k.j | |
| 7116 | * |....j i.k.| or |.k..j i...| |
| 7117 | */ |
| 7118 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); |
| 7119 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; |
| 7120 | i = j; |
| 7121 | } |
| 7122 | } |
| 7123 | |
Gleb Natapov | 7c90705 | 2010-10-14 11:22:53 +0200 | [diff] [blame] | 7124 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
| 7125 | { |
| 7126 | |
| 7127 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, |
| 7128 | sizeof(val)); |
| 7129 | } |
| 7130 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 7131 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
| 7132 | struct kvm_async_pf *work) |
| 7133 | { |
Avi Kivity | 6389ee9 | 2010-11-29 16:12:30 +0200 | [diff] [blame] | 7134 | struct x86_exception fault; |
| 7135 | |
Gleb Natapov | 7c90705 | 2010-10-14 11:22:53 +0200 | [diff] [blame] | 7136 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 7137 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
Gleb Natapov | 7c90705 | 2010-10-14 11:22:53 +0200 | [diff] [blame] | 7138 | |
| 7139 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || |
Gleb Natapov | fc5f06f | 2010-10-14 11:22:56 +0200 | [diff] [blame] | 7140 | (vcpu->arch.apf.send_user_only && |
| 7141 | kvm_x86_ops->get_cpl(vcpu) == 0)) |
Gleb Natapov | 7c90705 | 2010-10-14 11:22:53 +0200 | [diff] [blame] | 7142 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
| 7143 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { |
Avi Kivity | 6389ee9 | 2010-11-29 16:12:30 +0200 | [diff] [blame] | 7144 | fault.vector = PF_VECTOR; |
| 7145 | fault.error_code_valid = true; |
| 7146 | fault.error_code = 0; |
| 7147 | fault.nested_page_fault = false; |
| 7148 | fault.address = work->arch.token; |
| 7149 | kvm_inject_page_fault(vcpu, &fault); |
Gleb Natapov | 7c90705 | 2010-10-14 11:22:53 +0200 | [diff] [blame] | 7150 | } |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 7151 | } |
| 7152 | |
| 7153 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, |
| 7154 | struct kvm_async_pf *work) |
| 7155 | { |
Avi Kivity | 6389ee9 | 2010-11-29 16:12:30 +0200 | [diff] [blame] | 7156 | struct x86_exception fault; |
| 7157 | |
Gleb Natapov | 7c90705 | 2010-10-14 11:22:53 +0200 | [diff] [blame] | 7158 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
| 7159 | if (is_error_page(work->page)) |
| 7160 | work->arch.token = ~0; /* broadcast wakeup */ |
| 7161 | else |
| 7162 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); |
| 7163 | |
| 7164 | if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) && |
| 7165 | !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { |
Avi Kivity | 6389ee9 | 2010-11-29 16:12:30 +0200 | [diff] [blame] | 7166 | fault.vector = PF_VECTOR; |
| 7167 | fault.error_code_valid = true; |
| 7168 | fault.error_code = 0; |
| 7169 | fault.nested_page_fault = false; |
| 7170 | fault.address = work->arch.token; |
| 7171 | kvm_inject_page_fault(vcpu, &fault); |
Gleb Natapov | 7c90705 | 2010-10-14 11:22:53 +0200 | [diff] [blame] | 7172 | } |
Xiao Guangrong | e6d53e3 | 2010-11-01 17:01:28 +0800 | [diff] [blame] | 7173 | vcpu->arch.apf.halted = false; |
Gleb Natapov | a4fa163 | 2012-05-03 11:36:39 +0300 | [diff] [blame] | 7174 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
Gleb Natapov | 7c90705 | 2010-10-14 11:22:53 +0200 | [diff] [blame] | 7175 | } |
| 7176 | |
| 7177 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) |
| 7178 | { |
| 7179 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) |
| 7180 | return true; |
| 7181 | else |
| 7182 | return !kvm_event_needs_reinjection(vcpu) && |
| 7183 | kvm_x86_ops->interrupt_allowed(vcpu); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 7184 | } |
| 7185 | |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 7186 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
| 7187 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); |
| 7188 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); |
| 7189 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); |
| 7190 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); |
Joerg Roedel | 0ac406d | 2009-10-09 16:08:27 +0200 | [diff] [blame] | 7191 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
Joerg Roedel | d8cabdd | 2009-10-09 16:08:28 +0200 | [diff] [blame] | 7192 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
Joerg Roedel | 17897f3 | 2009-10-09 16:08:29 +0200 | [diff] [blame] | 7193 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
Joerg Roedel | 236649d | 2009-10-09 16:08:30 +0200 | [diff] [blame] | 7194 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
Joerg Roedel | ec1ff79 | 2009-10-09 16:08:31 +0200 | [diff] [blame] | 7195 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
Joerg Roedel | 532a46b | 2009-10-09 16:08:32 +0200 | [diff] [blame] | 7196 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
Joerg Roedel | 2e554e8 | 2010-02-24 18:59:14 +0100 | [diff] [blame] | 7197 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |