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 |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 9 | * |
| 10 | * Authors: |
| 11 | * Avi Kivity <avi@qumranet.com> |
| 12 | * Yaniv Kamay <yaniv@qumranet.com> |
Ben-Ami Yassour | 4d5c5d0 | 2008-07-28 19:26:26 +0300 | [diff] [blame] | 13 | * Amit Shah <amit.shah@qumranet.com> |
| 14 | * Ben-Ami Yassour <benami@il.ibm.com> |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 15 | * |
| 16 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 17 | * the COPYING file in the top-level directory. |
| 18 | * |
| 19 | */ |
| 20 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 21 | #include <linux/kvm_host.h> |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 22 | #include "irq.h" |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 23 | #include "mmu.h" |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 24 | #include "i8254.h" |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 25 | #include "tss.h" |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 26 | #include "kvm_cache_regs.h" |
Avi Kivity | 26eef70 | 2008-07-03 14:59:22 +0300 | [diff] [blame] | 27 | #include "x86.h" |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 28 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 29 | #include <linux/clocksource.h> |
Ben-Ami Yassour | 4d5c5d0 | 2008-07-28 19:26:26 +0300 | [diff] [blame] | 30 | #include <linux/interrupt.h> |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 31 | #include <linux/kvm.h> |
| 32 | #include <linux/fs.h> |
| 33 | #include <linux/vmalloc.h> |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 34 | #include <linux/module.h> |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 35 | #include <linux/mman.h> |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 36 | #include <linux/highmem.h> |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 37 | #include <linux/iommu.h> |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 38 | #include <linux/intel-iommu.h> |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 39 | #include <linux/cpufreq.h> |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 40 | |
| 41 | #include <asm/uaccess.h> |
Zhang Xiantao | d825ed0 | 2007-11-14 20:08:51 +0800 | [diff] [blame] | 42 | #include <asm/msr.h> |
Avi Kivity | a5f6130 | 2008-02-20 17:57:21 +0200 | [diff] [blame] | 43 | #include <asm/desc.h> |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 44 | #include <asm/mtrr.h> |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 45 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 46 | #define MAX_IO_MSRS 256 |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 47 | #define CR0_RESERVED_BITS \ |
| 48 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ |
| 49 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ |
| 50 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) |
| 51 | #define CR4_RESERVED_BITS \ |
| 52 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ |
| 53 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ |
| 54 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ |
| 55 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) |
| 56 | |
| 57 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) |
Joerg Roedel | 50a37eb | 2008-01-31 14:57:38 +0100 | [diff] [blame] | 58 | /* EFER defaults: |
| 59 | * - enable syscall per default because its emulated by KVM |
| 60 | * - enable LME and LMA per default on 64 bit KVM |
| 61 | */ |
| 62 | #ifdef CONFIG_X86_64 |
| 63 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; |
| 64 | #else |
| 65 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; |
| 66 | #endif |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 67 | |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 68 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
| 69 | #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] | 70 | |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 71 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
| 72 | struct kvm_cpuid_entry2 __user *entries); |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 73 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
| 74 | u32 function, u32 index); |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 75 | |
Zhang Xiantao | 97896d0 | 2007-11-14 20:09:30 +0800 | [diff] [blame] | 76 | struct kvm_x86_ops *kvm_x86_ops; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 77 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
Zhang Xiantao | 97896d0 | 2007-11-14 20:09:30 +0800 | [diff] [blame] | 78 | |
Hollis Blanchard | 417bc30 | 2007-10-31 17:24:23 -0500 | [diff] [blame] | 79 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 80 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
| 81 | { "pf_guest", VCPU_STAT(pf_guest) }, |
| 82 | { "tlb_flush", VCPU_STAT(tlb_flush) }, |
| 83 | { "invlpg", VCPU_STAT(invlpg) }, |
| 84 | { "exits", VCPU_STAT(exits) }, |
| 85 | { "io_exits", VCPU_STAT(io_exits) }, |
| 86 | { "mmio_exits", VCPU_STAT(mmio_exits) }, |
| 87 | { "signal_exits", VCPU_STAT(signal_exits) }, |
| 88 | { "irq_window", VCPU_STAT(irq_window_exits) }, |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 89 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 90 | { "halt_exits", VCPU_STAT(halt_exits) }, |
| 91 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
Amit Shah | f11c3a8 | 2008-02-21 01:00:30 +0530 | [diff] [blame] | 92 | { "hypercalls", VCPU_STAT(hypercalls) }, |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 93 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
| 94 | { "irq_exits", VCPU_STAT(irq_exits) }, |
| 95 | { "host_state_reload", VCPU_STAT(host_state_reload) }, |
| 96 | { "efer_reload", VCPU_STAT(efer_reload) }, |
| 97 | { "fpu_reload", VCPU_STAT(fpu_reload) }, |
| 98 | { "insn_emulation", VCPU_STAT(insn_emulation) }, |
| 99 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, |
Avi Kivity | fa89a81 | 2008-09-01 15:57:51 +0300 | [diff] [blame] | 100 | { "irq_injections", VCPU_STAT(irq_injections) }, |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 101 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
Avi Kivity | 4cee576 | 2007-11-18 16:37:07 +0200 | [diff] [blame] | 102 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
| 103 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, |
| 104 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, |
| 105 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, |
| 106 | { "mmu_flooded", VM_STAT(mmu_flooded) }, |
| 107 | { "mmu_recycled", VM_STAT(mmu_recycled) }, |
Avi Kivity | dfc5aa0 | 2007-12-18 19:47:18 +0200 | [diff] [blame] | 108 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
Marcelo Tosatti | 4731d4c | 2008-09-23 13:18:39 -0300 | [diff] [blame] | 109 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
Avi Kivity | 0f74a24 | 2007-11-20 23:01:14 +0200 | [diff] [blame] | 110 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
Marcelo Tosatti | 05da455 | 2008-02-23 11:44:30 -0300 | [diff] [blame] | 111 | { "largepages", VM_STAT(lpages) }, |
Hollis Blanchard | 417bc30 | 2007-10-31 17:24:23 -0500 | [diff] [blame] | 112 | { NULL } |
| 113 | }; |
| 114 | |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 115 | unsigned long segment_base(u16 selector) |
| 116 | { |
| 117 | struct descriptor_table gdt; |
Avi Kivity | a5f6130 | 2008-02-20 17:57:21 +0200 | [diff] [blame] | 118 | struct desc_struct *d; |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 119 | unsigned long table_base; |
| 120 | unsigned long v; |
| 121 | |
| 122 | if (selector == 0) |
| 123 | return 0; |
| 124 | |
| 125 | asm("sgdt %0" : "=m"(gdt)); |
| 126 | table_base = gdt.base; |
| 127 | |
| 128 | if (selector & 4) { /* from ldt */ |
| 129 | u16 ldt_selector; |
| 130 | |
| 131 | asm("sldt %0" : "=g"(ldt_selector)); |
| 132 | table_base = segment_base(ldt_selector); |
| 133 | } |
Avi Kivity | a5f6130 | 2008-02-20 17:57:21 +0200 | [diff] [blame] | 134 | d = (struct desc_struct *)(table_base + (selector & ~7)); |
| 135 | v = d->base0 | ((unsigned long)d->base1 << 16) | |
| 136 | ((unsigned long)d->base2 << 24); |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 137 | #ifdef CONFIG_X86_64 |
Avi Kivity | a5f6130 | 2008-02-20 17:57:21 +0200 | [diff] [blame] | 138 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) |
| 139 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 140 | #endif |
| 141 | return v; |
| 142 | } |
| 143 | EXPORT_SYMBOL_GPL(segment_base); |
| 144 | |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame] | 145 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
| 146 | { |
| 147 | if (irqchip_in_kernel(vcpu->kvm)) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 148 | return vcpu->arch.apic_base; |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame] | 149 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 150 | return vcpu->arch.apic_base; |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame] | 151 | } |
| 152 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); |
| 153 | |
| 154 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) |
| 155 | { |
| 156 | /* TODO: reserve bits check */ |
| 157 | if (irqchip_in_kernel(vcpu->kvm)) |
| 158 | kvm_lapic_set_base(vcpu, data); |
| 159 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 160 | vcpu->arch.apic_base = data; |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame] | 161 | } |
| 162 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); |
| 163 | |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 164 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
| 165 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 166 | WARN_ON(vcpu->arch.exception.pending); |
| 167 | vcpu->arch.exception.pending = true; |
| 168 | vcpu->arch.exception.has_error_code = false; |
| 169 | vcpu->arch.exception.nr = nr; |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 170 | } |
| 171 | EXPORT_SYMBOL_GPL(kvm_queue_exception); |
| 172 | |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 173 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
| 174 | u32 error_code) |
| 175 | { |
| 176 | ++vcpu->stat.pf_guest; |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 177 | |
Joerg Roedel | 71c4dfa | 2008-02-26 16:49:16 +0100 | [diff] [blame] | 178 | if (vcpu->arch.exception.pending) { |
| 179 | if (vcpu->arch.exception.nr == PF_VECTOR) { |
| 180 | printk(KERN_DEBUG "kvm: inject_page_fault:" |
| 181 | " double fault 0x%lx\n", addr); |
| 182 | vcpu->arch.exception.nr = DF_VECTOR; |
| 183 | vcpu->arch.exception.error_code = 0; |
| 184 | } else if (vcpu->arch.exception.nr == DF_VECTOR) { |
| 185 | /* triple fault -> shutdown */ |
| 186 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); |
| 187 | } |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 188 | return; |
| 189 | } |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 190 | vcpu->arch.cr2 = addr; |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 191 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
| 192 | } |
| 193 | |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 194 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
| 195 | { |
| 196 | vcpu->arch.nmi_pending = 1; |
| 197 | } |
| 198 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); |
| 199 | |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 200 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
| 201 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 202 | WARN_ON(vcpu->arch.exception.pending); |
| 203 | vcpu->arch.exception.pending = true; |
| 204 | vcpu->arch.exception.has_error_code = true; |
| 205 | vcpu->arch.exception.nr = nr; |
| 206 | vcpu->arch.exception.error_code = error_code; |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 207 | } |
| 208 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); |
| 209 | |
| 210 | static void __queue_exception(struct kvm_vcpu *vcpu) |
| 211 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 212 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
| 213 | vcpu->arch.exception.has_error_code, |
| 214 | vcpu->arch.exception.error_code); |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 215 | } |
| 216 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 217 | /* |
| 218 | * Load the pae pdptrs. Return true is they are all valid. |
| 219 | */ |
| 220 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) |
| 221 | { |
| 222 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; |
| 223 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; |
| 224 | int i; |
| 225 | int ret; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 226 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 227 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 228 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
| 229 | offset * sizeof(u64), sizeof(pdpte)); |
| 230 | if (ret < 0) { |
| 231 | ret = 0; |
| 232 | goto out; |
| 233 | } |
| 234 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { |
Dong, Eddie | 20c466b | 2009-03-31 23:03:45 +0800 | [diff] [blame] | 235 | if (is_present_pte(pdpte[i]) && |
| 236 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 237 | ret = 0; |
| 238 | goto out; |
| 239 | } |
| 240 | } |
| 241 | ret = 1; |
| 242 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 243 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 244 | out: |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 245 | |
| 246 | return ret; |
| 247 | } |
Joerg Roedel | cc4b687 | 2008-02-07 13:47:43 +0100 | [diff] [blame] | 248 | EXPORT_SYMBOL_GPL(load_pdptrs); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 249 | |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 250 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
| 251 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 252 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 253 | bool changed = true; |
| 254 | int r; |
| 255 | |
| 256 | if (is_long_mode(vcpu) || !is_pae(vcpu)) |
| 257 | return false; |
| 258 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 259 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 260 | if (r < 0) |
| 261 | goto out; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 262 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 263 | out: |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 264 | |
| 265 | return changed; |
| 266 | } |
| 267 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 268 | void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 269 | { |
| 270 | if (cr0 & CR0_RESERVED_BITS) { |
| 271 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 272 | cr0, vcpu->arch.cr0); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 273 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 274 | return; |
| 275 | } |
| 276 | |
| 277 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { |
| 278 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 279 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 280 | return; |
| 281 | } |
| 282 | |
| 283 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { |
| 284 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " |
| 285 | "and a clear PE flag\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 286 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 287 | return; |
| 288 | } |
| 289 | |
| 290 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { |
| 291 | #ifdef CONFIG_X86_64 |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 292 | if ((vcpu->arch.shadow_efer & EFER_LME)) { |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 293 | int cs_db, cs_l; |
| 294 | |
| 295 | if (!is_pae(vcpu)) { |
| 296 | printk(KERN_DEBUG "set_cr0: #GP, start paging " |
| 297 | "in long mode while PAE is disabled\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 298 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 299 | return; |
| 300 | } |
| 301 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
| 302 | if (cs_l) { |
| 303 | printk(KERN_DEBUG "set_cr0: #GP, start paging " |
| 304 | "in long mode while CS.L == 1\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 305 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 306 | return; |
| 307 | |
| 308 | } |
| 309 | } else |
| 310 | #endif |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 311 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 312 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
| 313 | "reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 314 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 315 | return; |
| 316 | } |
| 317 | |
| 318 | } |
| 319 | |
| 320 | kvm_x86_ops->set_cr0(vcpu, cr0); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 321 | vcpu->arch.cr0 = cr0; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 322 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 323 | kvm_mmu_reset_context(vcpu); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 324 | return; |
| 325 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 326 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 327 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 328 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 329 | { |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 330 | kvm_set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)); |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 331 | KVMTRACE_1D(LMSW, vcpu, |
| 332 | (u32)((vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)), |
| 333 | handler); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 334 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 335 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 336 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 337 | void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 338 | { |
Avi Kivity | a2edf57 | 2009-05-24 22:19:00 +0300 | [diff] [blame] | 339 | unsigned long old_cr4 = vcpu->arch.cr4; |
| 340 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE; |
| 341 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 342 | if (cr4 & CR4_RESERVED_BITS) { |
| 343 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 344 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 345 | return; |
| 346 | } |
| 347 | |
| 348 | if (is_long_mode(vcpu)) { |
| 349 | if (!(cr4 & X86_CR4_PAE)) { |
| 350 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " |
| 351 | "in long mode\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 352 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 353 | return; |
| 354 | } |
Avi Kivity | a2edf57 | 2009-05-24 22:19:00 +0300 | [diff] [blame] | 355 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
| 356 | && ((cr4 ^ old_cr4) & pdptr_bits) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 357 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 358 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 359 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 360 | return; |
| 361 | } |
| 362 | |
| 363 | if (cr4 & X86_CR4_VMXE) { |
| 364 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 365 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 366 | return; |
| 367 | } |
| 368 | kvm_x86_ops->set_cr4(vcpu, cr4); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 369 | vcpu->arch.cr4 = cr4; |
Avi Kivity | 5a41acc | 2009-01-11 17:19:35 +0200 | [diff] [blame] | 370 | vcpu->arch.mmu.base_role.cr4_pge = (cr4 & X86_CR4_PGE) && !tdp_enabled; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 371 | kvm_mmu_reset_context(vcpu); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 372 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 373 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 374 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 375 | void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 376 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 377 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
Marcelo Tosatti | 0ba73cd | 2008-09-23 13:18:34 -0300 | [diff] [blame] | 378 | kvm_mmu_sync_roots(vcpu); |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 379 | kvm_mmu_flush_tlb(vcpu); |
| 380 | return; |
| 381 | } |
| 382 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 383 | if (is_long_mode(vcpu)) { |
| 384 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { |
| 385 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 386 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 387 | return; |
| 388 | } |
| 389 | } else { |
| 390 | if (is_pae(vcpu)) { |
| 391 | if (cr3 & CR3_PAE_RESERVED_BITS) { |
| 392 | printk(KERN_DEBUG |
| 393 | "set_cr3: #GP, reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 394 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 395 | return; |
| 396 | } |
| 397 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { |
| 398 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " |
| 399 | "reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 400 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 401 | return; |
| 402 | } |
| 403 | } |
| 404 | /* |
| 405 | * We don't check reserved bits in nonpae mode, because |
| 406 | * this isn't enforced, and VMware depends on this. |
| 407 | */ |
| 408 | } |
| 409 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 410 | /* |
| 411 | * Does the new cr3 value map to physical memory? (Note, we |
| 412 | * catch an invalid cr3 even in real-mode, because it would |
| 413 | * cause trouble later on when we turn on paging anyway.) |
| 414 | * |
| 415 | * A real CPU would silently accept an invalid cr3 and would |
| 416 | * attempt to use it - with largely undefined (and often hard |
| 417 | * to debug) behavior on the guest side. |
| 418 | */ |
| 419 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 420 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 421 | else { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 422 | vcpu->arch.cr3 = cr3; |
| 423 | vcpu->arch.mmu.new_cr3(vcpu); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 424 | } |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 425 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 426 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 427 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 428 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 429 | { |
| 430 | if (cr8 & CR8_RESERVED_BITS) { |
| 431 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 432 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 433 | return; |
| 434 | } |
| 435 | if (irqchip_in_kernel(vcpu->kvm)) |
| 436 | kvm_lapic_set_tpr(vcpu, cr8); |
| 437 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 438 | vcpu->arch.cr8 = cr8; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 439 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 440 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 441 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 442 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 443 | { |
| 444 | if (irqchip_in_kernel(vcpu->kvm)) |
| 445 | return kvm_lapic_get_cr8(vcpu); |
| 446 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 447 | return vcpu->arch.cr8; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 448 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 449 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 450 | |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 451 | static inline u32 bit(int bitno) |
| 452 | { |
| 453 | return 1 << (bitno & 31); |
| 454 | } |
| 455 | |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 456 | /* |
| 457 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS |
| 458 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. |
| 459 | * |
| 460 | * This list is modified at module load time to reflect the |
| 461 | * capabilities of the host cpu. |
| 462 | */ |
| 463 | static u32 msrs_to_save[] = { |
| 464 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
| 465 | MSR_K6_STAR, |
| 466 | #ifdef CONFIG_X86_64 |
| 467 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
| 468 | #endif |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 469 | MSR_IA32_TIME_STAMP_COUNTER, MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
Alexander Graf | b286d5d | 2008-11-25 20:17:05 +0100 | [diff] [blame] | 470 | MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 471 | }; |
| 472 | |
| 473 | static unsigned num_msrs_to_save; |
| 474 | |
| 475 | static u32 emulated_msrs[] = { |
| 476 | MSR_IA32_MISC_ENABLE, |
| 477 | }; |
| 478 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 479 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
| 480 | { |
Joerg Roedel | f2b4b7d | 2008-01-31 14:57:37 +0100 | [diff] [blame] | 481 | if (efer & efer_reserved_bits) { |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 482 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", |
| 483 | efer); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 484 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 485 | return; |
| 486 | } |
| 487 | |
| 488 | if (is_paging(vcpu) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 489 | && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) { |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 490 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 491 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 492 | return; |
| 493 | } |
| 494 | |
Alexander Graf | 1b2fd70 | 2009-02-02 16:23:51 +0100 | [diff] [blame] | 495 | if (efer & EFER_FFXSR) { |
| 496 | struct kvm_cpuid_entry2 *feat; |
| 497 | |
| 498 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); |
| 499 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) { |
| 500 | printk(KERN_DEBUG "set_efer: #GP, enable FFXSR w/o CPUID capability\n"); |
| 501 | kvm_inject_gp(vcpu, 0); |
| 502 | return; |
| 503 | } |
| 504 | } |
| 505 | |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 506 | if (efer & EFER_SVME) { |
| 507 | struct kvm_cpuid_entry2 *feat; |
| 508 | |
| 509 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); |
| 510 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) { |
| 511 | printk(KERN_DEBUG "set_efer: #GP, enable SVM w/o SVM\n"); |
| 512 | kvm_inject_gp(vcpu, 0); |
| 513 | return; |
| 514 | } |
| 515 | } |
| 516 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 517 | kvm_x86_ops->set_efer(vcpu, efer); |
| 518 | |
| 519 | efer &= ~EFER_LMA; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 520 | efer |= vcpu->arch.shadow_efer & EFER_LMA; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 521 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 522 | vcpu->arch.shadow_efer = efer; |
Avi Kivity | 9645bb56 | 2009-03-31 11:31:54 +0300 | [diff] [blame] | 523 | |
| 524 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; |
| 525 | kvm_mmu_reset_context(vcpu); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 526 | } |
| 527 | |
Joerg Roedel | f2b4b7d | 2008-01-31 14:57:37 +0100 | [diff] [blame] | 528 | void kvm_enable_efer_bits(u64 mask) |
| 529 | { |
| 530 | efer_reserved_bits &= ~mask; |
| 531 | } |
| 532 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); |
| 533 | |
| 534 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 535 | /* |
| 536 | * Writes msr value into into the appropriate "register". |
| 537 | * Returns 0 on success, non-0 otherwise. |
| 538 | * Assumes vcpu_load() was already called. |
| 539 | */ |
| 540 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) |
| 541 | { |
| 542 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); |
| 543 | } |
| 544 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 545 | /* |
| 546 | * Adapt set_msr() to msr_io()'s calling convention |
| 547 | */ |
| 548 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
| 549 | { |
| 550 | return kvm_set_msr(vcpu, index, *data); |
| 551 | } |
| 552 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 553 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
| 554 | { |
| 555 | static int version; |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 556 | struct pvclock_wall_clock wc; |
| 557 | struct timespec now, sys, boot; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 558 | |
| 559 | if (!wall_clock) |
| 560 | return; |
| 561 | |
| 562 | version++; |
| 563 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 564 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
| 565 | |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 566 | /* |
| 567 | * The guest calculates current wall clock time by adding |
| 568 | * system time (updated by kvm_write_guest_time below) to the |
| 569 | * wall clock specified here. guest system time equals host |
| 570 | * system time for us, thus we must fill in host boot time here. |
| 571 | */ |
| 572 | now = current_kernel_time(); |
| 573 | ktime_get_ts(&sys); |
| 574 | boot = ns_to_timespec(timespec_to_ns(&now) - timespec_to_ns(&sys)); |
| 575 | |
| 576 | wc.sec = boot.tv_sec; |
| 577 | wc.nsec = boot.tv_nsec; |
| 578 | wc.version = version; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 579 | |
| 580 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); |
| 581 | |
| 582 | version++; |
| 583 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 584 | } |
| 585 | |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 586 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
| 587 | { |
| 588 | uint32_t quotient, remainder; |
| 589 | |
| 590 | /* Don't try to replace with do_div(), this one calculates |
| 591 | * "(dividend << 32) / divisor" */ |
| 592 | __asm__ ( "divl %4" |
| 593 | : "=a" (quotient), "=d" (remainder) |
| 594 | : "0" (0), "1" (dividend), "r" (divisor) ); |
| 595 | return quotient; |
| 596 | } |
| 597 | |
| 598 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) |
| 599 | { |
| 600 | uint64_t nsecs = 1000000000LL; |
| 601 | int32_t shift = 0; |
| 602 | uint64_t tps64; |
| 603 | uint32_t tps32; |
| 604 | |
| 605 | tps64 = tsc_khz * 1000LL; |
| 606 | while (tps64 > nsecs*2) { |
| 607 | tps64 >>= 1; |
| 608 | shift--; |
| 609 | } |
| 610 | |
| 611 | tps32 = (uint32_t)tps64; |
| 612 | while (tps32 <= (uint32_t)nsecs) { |
| 613 | tps32 <<= 1; |
| 614 | shift++; |
| 615 | } |
| 616 | |
| 617 | hv_clock->tsc_shift = shift; |
| 618 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); |
| 619 | |
| 620 | pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n", |
Harvey Harrison | 80a914d | 2008-10-15 22:01:25 -0700 | [diff] [blame] | 621 | __func__, tsc_khz, hv_clock->tsc_shift, |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 622 | hv_clock->tsc_to_system_mul); |
| 623 | } |
| 624 | |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 625 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
| 626 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 627 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
| 628 | { |
| 629 | struct timespec ts; |
| 630 | unsigned long flags; |
| 631 | struct kvm_vcpu_arch *vcpu = &v->arch; |
| 632 | void *shared_kaddr; |
Avi Kivity | 463656c | 2009-04-12 15:49:07 +0300 | [diff] [blame] | 633 | unsigned long this_tsc_khz; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 634 | |
| 635 | if ((!vcpu->time_page)) |
| 636 | return; |
| 637 | |
Avi Kivity | 463656c | 2009-04-12 15:49:07 +0300 | [diff] [blame] | 638 | this_tsc_khz = get_cpu_var(cpu_tsc_khz); |
| 639 | if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) { |
| 640 | kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock); |
| 641 | vcpu->hv_clock_tsc_khz = this_tsc_khz; |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 642 | } |
Avi Kivity | 463656c | 2009-04-12 15:49:07 +0300 | [diff] [blame] | 643 | put_cpu_var(cpu_tsc_khz); |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 644 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 645 | /* Keep irq disabled to prevent changes to the clock */ |
| 646 | local_irq_save(flags); |
| 647 | kvm_get_msr(v, MSR_IA32_TIME_STAMP_COUNTER, |
| 648 | &vcpu->hv_clock.tsc_timestamp); |
| 649 | ktime_get_ts(&ts); |
| 650 | local_irq_restore(flags); |
| 651 | |
| 652 | /* With all the info we got, fill in the values */ |
| 653 | |
| 654 | vcpu->hv_clock.system_time = ts.tv_nsec + |
| 655 | (NSEC_PER_SEC * (u64)ts.tv_sec); |
| 656 | /* |
| 657 | * The interface expects us to write an even number signaling that the |
| 658 | * update is finished. Since the guest won't see the intermediate |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 659 | * state, we just increase by 2 at the end. |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 660 | */ |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 661 | vcpu->hv_clock.version += 2; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 662 | |
| 663 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); |
| 664 | |
| 665 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 666 | sizeof(vcpu->hv_clock)); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 667 | |
| 668 | kunmap_atomic(shared_kaddr, KM_USER0); |
| 669 | |
| 670 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); |
| 671 | } |
| 672 | |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 673 | static int kvm_request_guest_time_update(struct kvm_vcpu *v) |
| 674 | { |
| 675 | struct kvm_vcpu_arch *vcpu = &v->arch; |
| 676 | |
| 677 | if (!vcpu->time_page) |
| 678 | return 0; |
| 679 | set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests); |
| 680 | return 1; |
| 681 | } |
| 682 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 683 | static bool msr_mtrr_valid(unsigned msr) |
| 684 | { |
| 685 | switch (msr) { |
| 686 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: |
| 687 | case MSR_MTRRfix64K_00000: |
| 688 | case MSR_MTRRfix16K_80000: |
| 689 | case MSR_MTRRfix16K_A0000: |
| 690 | case MSR_MTRRfix4K_C0000: |
| 691 | case MSR_MTRRfix4K_C8000: |
| 692 | case MSR_MTRRfix4K_D0000: |
| 693 | case MSR_MTRRfix4K_D8000: |
| 694 | case MSR_MTRRfix4K_E0000: |
| 695 | case MSR_MTRRfix4K_E8000: |
| 696 | case MSR_MTRRfix4K_F0000: |
| 697 | case MSR_MTRRfix4K_F8000: |
| 698 | case MSR_MTRRdefType: |
| 699 | case MSR_IA32_CR_PAT: |
| 700 | return true; |
| 701 | case 0x2f8: |
| 702 | return true; |
| 703 | } |
| 704 | return false; |
| 705 | } |
| 706 | |
Marcelo Tosatti | d6289b9 | 2009-06-22 15:27:56 -0300 | [diff] [blame] | 707 | static bool valid_pat_type(unsigned t) |
| 708 | { |
| 709 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ |
| 710 | } |
| 711 | |
| 712 | static bool valid_mtrr_type(unsigned t) |
| 713 | { |
| 714 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ |
| 715 | } |
| 716 | |
| 717 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 718 | { |
| 719 | int i; |
| 720 | |
| 721 | if (!msr_mtrr_valid(msr)) |
| 722 | return false; |
| 723 | |
| 724 | if (msr == MSR_IA32_CR_PAT) { |
| 725 | for (i = 0; i < 8; i++) |
| 726 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) |
| 727 | return false; |
| 728 | return true; |
| 729 | } else if (msr == MSR_MTRRdefType) { |
| 730 | if (data & ~0xcff) |
| 731 | return false; |
| 732 | return valid_mtrr_type(data & 0xff); |
| 733 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { |
| 734 | for (i = 0; i < 8 ; i++) |
| 735 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) |
| 736 | return false; |
| 737 | return true; |
| 738 | } |
| 739 | |
| 740 | /* variable MTRRs */ |
| 741 | return valid_mtrr_type(data & 0xff); |
| 742 | } |
| 743 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 744 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 745 | { |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 746 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
| 747 | |
Marcelo Tosatti | d6289b9 | 2009-06-22 15:27:56 -0300 | [diff] [blame] | 748 | if (!mtrr_valid(vcpu, msr, data)) |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 749 | return 1; |
| 750 | |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 751 | if (msr == MSR_MTRRdefType) { |
| 752 | vcpu->arch.mtrr_state.def_type = data; |
| 753 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; |
| 754 | } else if (msr == MSR_MTRRfix64K_00000) |
| 755 | p[0] = data; |
| 756 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) |
| 757 | p[1 + msr - MSR_MTRRfix16K_80000] = data; |
| 758 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) |
| 759 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; |
| 760 | else if (msr == MSR_IA32_CR_PAT) |
| 761 | vcpu->arch.pat = data; |
| 762 | else { /* Variable MTRRs */ |
| 763 | int idx, is_mtrr_mask; |
| 764 | u64 *pt; |
| 765 | |
| 766 | idx = (msr - 0x200) / 2; |
| 767 | is_mtrr_mask = msr - 0x200 - 2 * idx; |
| 768 | if (!is_mtrr_mask) |
| 769 | pt = |
| 770 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; |
| 771 | else |
| 772 | pt = |
| 773 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; |
| 774 | *pt = data; |
| 775 | } |
| 776 | |
| 777 | kvm_mmu_reset_context(vcpu); |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 778 | return 0; |
| 779 | } |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 780 | |
| 781 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 782 | { |
| 783 | switch (msr) { |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 784 | case MSR_EFER: |
| 785 | set_efer(vcpu, data); |
| 786 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 787 | case MSR_IA32_MC0_STATUS: |
| 788 | pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 789 | __func__, data); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 790 | break; |
| 791 | case MSR_IA32_MCG_STATUS: |
| 792 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 793 | __func__, data); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 794 | break; |
Joerg Roedel | c7ac679 | 2008-02-11 20:28:27 +0100 | [diff] [blame] | 795 | case MSR_IA32_MCG_CTL: |
| 796 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n", |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 797 | __func__, data); |
Joerg Roedel | c7ac679 | 2008-02-11 20:28:27 +0100 | [diff] [blame] | 798 | break; |
Alexander Graf | b5e2fec | 2008-07-22 08:00:45 +0200 | [diff] [blame] | 799 | case MSR_IA32_DEBUGCTLMSR: |
| 800 | if (!data) { |
| 801 | /* We support the non-activated case already */ |
| 802 | break; |
| 803 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { |
| 804 | /* Values other than LBR and BTF are vendor-specific, |
| 805 | thus reserved and should throw a #GP */ |
| 806 | return 1; |
| 807 | } |
| 808 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
| 809 | __func__, data); |
| 810 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 811 | case MSR_IA32_UCODE_REV: |
| 812 | case MSR_IA32_UCODE_WRITE: |
Avi Kivity | 61a6bd6 | 2008-12-29 17:32:28 +0200 | [diff] [blame] | 813 | case MSR_VM_HSAVE_PA: |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 814 | break; |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 815 | case 0x200 ... 0x2ff: |
| 816 | return set_msr_mtrr(vcpu, msr, data); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 817 | case MSR_IA32_APICBASE: |
| 818 | kvm_set_apic_base(vcpu, data); |
| 819 | break; |
| 820 | case MSR_IA32_MISC_ENABLE: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 821 | vcpu->arch.ia32_misc_enable_msr = data; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 822 | break; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 823 | case MSR_KVM_WALL_CLOCK: |
| 824 | vcpu->kvm->arch.wall_clock = data; |
| 825 | kvm_write_wall_clock(vcpu->kvm, data); |
| 826 | break; |
| 827 | case MSR_KVM_SYSTEM_TIME: { |
| 828 | if (vcpu->arch.time_page) { |
| 829 | kvm_release_page_dirty(vcpu->arch.time_page); |
| 830 | vcpu->arch.time_page = NULL; |
| 831 | } |
| 832 | |
| 833 | vcpu->arch.time = data; |
| 834 | |
| 835 | /* we verify if the enable bit is set... */ |
| 836 | if (!(data & 1)) |
| 837 | break; |
| 838 | |
| 839 | /* ...but clean it before doing the actual write */ |
| 840 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); |
| 841 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 842 | vcpu->arch.time_page = |
| 843 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 844 | |
| 845 | if (is_error_page(vcpu->arch.time_page)) { |
| 846 | kvm_release_page_clean(vcpu->arch.time_page); |
| 847 | vcpu->arch.time_page = NULL; |
| 848 | } |
| 849 | |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 850 | kvm_request_guest_time_update(vcpu); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 851 | break; |
| 852 | } |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 853 | default: |
Avi Kivity | 565f1fb | 2007-12-19 12:02:40 +0200 | [diff] [blame] | 854 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", msr, data); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 855 | return 1; |
| 856 | } |
| 857 | return 0; |
| 858 | } |
| 859 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); |
| 860 | |
| 861 | |
| 862 | /* |
| 863 | * Reads an msr value (of 'msr_index') into 'pdata'. |
| 864 | * Returns 0 on success, non-0 otherwise. |
| 865 | * Assumes vcpu_load() was already called. |
| 866 | */ |
| 867 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
| 868 | { |
| 869 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); |
| 870 | } |
| 871 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 872 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
| 873 | { |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 874 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
| 875 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 876 | if (!msr_mtrr_valid(msr)) |
| 877 | return 1; |
| 878 | |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 879 | if (msr == MSR_MTRRdefType) |
| 880 | *pdata = vcpu->arch.mtrr_state.def_type + |
| 881 | (vcpu->arch.mtrr_state.enabled << 10); |
| 882 | else if (msr == MSR_MTRRfix64K_00000) |
| 883 | *pdata = p[0]; |
| 884 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) |
| 885 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; |
| 886 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) |
| 887 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; |
| 888 | else if (msr == MSR_IA32_CR_PAT) |
| 889 | *pdata = vcpu->arch.pat; |
| 890 | else { /* Variable MTRRs */ |
| 891 | int idx, is_mtrr_mask; |
| 892 | u64 *pt; |
| 893 | |
| 894 | idx = (msr - 0x200) / 2; |
| 895 | is_mtrr_mask = msr - 0x200 - 2 * idx; |
| 896 | if (!is_mtrr_mask) |
| 897 | pt = |
| 898 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; |
| 899 | else |
| 900 | pt = |
| 901 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; |
| 902 | *pdata = *pt; |
| 903 | } |
| 904 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 905 | return 0; |
| 906 | } |
| 907 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 908 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
| 909 | { |
| 910 | u64 data; |
| 911 | |
| 912 | switch (msr) { |
| 913 | case 0xc0010010: /* SYSCFG */ |
| 914 | case 0xc0010015: /* HWCR */ |
| 915 | case MSR_IA32_PLATFORM_ID: |
| 916 | case MSR_IA32_P5_MC_ADDR: |
| 917 | case MSR_IA32_P5_MC_TYPE: |
| 918 | case MSR_IA32_MC0_CTL: |
| 919 | case MSR_IA32_MCG_STATUS: |
| 920 | case MSR_IA32_MCG_CAP: |
Joerg Roedel | c7ac679 | 2008-02-11 20:28:27 +0100 | [diff] [blame] | 921 | case MSR_IA32_MCG_CTL: |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 922 | case MSR_IA32_MC0_MISC: |
| 923 | case MSR_IA32_MC0_MISC+4: |
| 924 | case MSR_IA32_MC0_MISC+8: |
| 925 | case MSR_IA32_MC0_MISC+12: |
| 926 | case MSR_IA32_MC0_MISC+16: |
Joerg Roedel | a89c1ad | 2008-08-29 11:52:07 +0200 | [diff] [blame] | 927 | case MSR_IA32_MC0_MISC+20: |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 928 | case MSR_IA32_UCODE_REV: |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 929 | case MSR_IA32_EBL_CR_POWERON: |
Alexander Graf | b5e2fec | 2008-07-22 08:00:45 +0200 | [diff] [blame] | 930 | case MSR_IA32_DEBUGCTLMSR: |
| 931 | case MSR_IA32_LASTBRANCHFROMIP: |
| 932 | case MSR_IA32_LASTBRANCHTOIP: |
| 933 | case MSR_IA32_LASTINTFROMIP: |
| 934 | case MSR_IA32_LASTINTTOIP: |
Avi Kivity | 61a6bd6 | 2008-12-29 17:32:28 +0200 | [diff] [blame] | 935 | case MSR_VM_HSAVE_PA: |
Amit Shah | 7fe29e0 | 2009-03-20 12:39:00 +0530 | [diff] [blame] | 936 | case MSR_P6_EVNTSEL0: |
| 937 | case MSR_P6_EVNTSEL1: |
Amit Shah | 9e69962 | 2009-06-15 13:25:34 +0530 | [diff] [blame] | 938 | case MSR_K7_EVNTSEL0: |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 939 | data = 0; |
| 940 | break; |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 941 | case MSR_MTRRcap: |
| 942 | data = 0x500 | KVM_NR_VAR_MTRR; |
| 943 | break; |
| 944 | case 0x200 ... 0x2ff: |
| 945 | return get_msr_mtrr(vcpu, msr, pdata); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 946 | case 0xcd: /* fsb frequency */ |
| 947 | data = 3; |
| 948 | break; |
| 949 | case MSR_IA32_APICBASE: |
| 950 | data = kvm_get_apic_base(vcpu); |
| 951 | break; |
| 952 | case MSR_IA32_MISC_ENABLE: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 953 | data = vcpu->arch.ia32_misc_enable_msr; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 954 | break; |
Alexander Graf | 847f0ad | 2008-02-21 12:11:01 +0100 | [diff] [blame] | 955 | case MSR_IA32_PERF_STATUS: |
| 956 | /* TSC increment by tick */ |
| 957 | data = 1000ULL; |
| 958 | /* CPU multiplier */ |
| 959 | data |= (((uint64_t)4ULL) << 40); |
| 960 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 961 | case MSR_EFER: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 962 | data = vcpu->arch.shadow_efer; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 963 | break; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 964 | case MSR_KVM_WALL_CLOCK: |
| 965 | data = vcpu->kvm->arch.wall_clock; |
| 966 | break; |
| 967 | case MSR_KVM_SYSTEM_TIME: |
| 968 | data = vcpu->arch.time; |
| 969 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 970 | default: |
| 971 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); |
| 972 | return 1; |
| 973 | } |
| 974 | *pdata = data; |
| 975 | return 0; |
| 976 | } |
| 977 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); |
| 978 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 979 | /* |
| 980 | * Read or write a bunch of msrs. All parameters are kernel addresses. |
| 981 | * |
| 982 | * @return number of msrs set successfully. |
| 983 | */ |
| 984 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
| 985 | struct kvm_msr_entry *entries, |
| 986 | int (*do_msr)(struct kvm_vcpu *vcpu, |
| 987 | unsigned index, u64 *data)) |
| 988 | { |
| 989 | int i; |
| 990 | |
| 991 | vcpu_load(vcpu); |
| 992 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 993 | down_read(&vcpu->kvm->slots_lock); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 994 | for (i = 0; i < msrs->nmsrs; ++i) |
| 995 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) |
| 996 | break; |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 997 | up_read(&vcpu->kvm->slots_lock); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 998 | |
| 999 | vcpu_put(vcpu); |
| 1000 | |
| 1001 | return i; |
| 1002 | } |
| 1003 | |
| 1004 | /* |
| 1005 | * Read or write a bunch of msrs. Parameters are user addresses. |
| 1006 | * |
| 1007 | * @return number of msrs set successfully. |
| 1008 | */ |
| 1009 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
| 1010 | int (*do_msr)(struct kvm_vcpu *vcpu, |
| 1011 | unsigned index, u64 *data), |
| 1012 | int writeback) |
| 1013 | { |
| 1014 | struct kvm_msrs msrs; |
| 1015 | struct kvm_msr_entry *entries; |
| 1016 | int r, n; |
| 1017 | unsigned size; |
| 1018 | |
| 1019 | r = -EFAULT; |
| 1020 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) |
| 1021 | goto out; |
| 1022 | |
| 1023 | r = -E2BIG; |
| 1024 | if (msrs.nmsrs >= MAX_IO_MSRS) |
| 1025 | goto out; |
| 1026 | |
| 1027 | r = -ENOMEM; |
| 1028 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
| 1029 | entries = vmalloc(size); |
| 1030 | if (!entries) |
| 1031 | goto out; |
| 1032 | |
| 1033 | r = -EFAULT; |
| 1034 | if (copy_from_user(entries, user_msrs->entries, size)) |
| 1035 | goto out_free; |
| 1036 | |
| 1037 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
| 1038 | if (r < 0) |
| 1039 | goto out_free; |
| 1040 | |
| 1041 | r = -EFAULT; |
| 1042 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) |
| 1043 | goto out_free; |
| 1044 | |
| 1045 | r = n; |
| 1046 | |
| 1047 | out_free: |
| 1048 | vfree(entries); |
| 1049 | out: |
| 1050 | return r; |
| 1051 | } |
| 1052 | |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 1053 | int kvm_dev_ioctl_check_extension(long ext) |
| 1054 | { |
| 1055 | int r; |
| 1056 | |
| 1057 | switch (ext) { |
| 1058 | case KVM_CAP_IRQCHIP: |
| 1059 | case KVM_CAP_HLT: |
| 1060 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 1061 | case KVM_CAP_SET_TSS_ADDR: |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1062 | case KVM_CAP_EXT_CPUID: |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 1063 | case KVM_CAP_CLOCKSOURCE: |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 1064 | case KVM_CAP_PIT: |
Marcelo Tosatti | a28e4f5 | 2008-02-22 12:21:36 -0500 | [diff] [blame] | 1065 | case KVM_CAP_NOP_IO_DELAY: |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 1066 | case KVM_CAP_MP_STATE: |
Avi Kivity | ed84862 | 2008-07-29 11:30:57 +0300 | [diff] [blame] | 1067 | case KVM_CAP_SYNC_MMU: |
Marcelo Tosatti | 52d939a | 2008-12-30 15:55:06 -0200 | [diff] [blame] | 1068 | case KVM_CAP_REINJECT_CONTROL: |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 1069 | case KVM_CAP_IRQ_INJECT_STATUS: |
Sheng Yang | e56d532 | 2009-03-12 21:45:39 +0800 | [diff] [blame] | 1070 | case KVM_CAP_ASSIGN_DEV_IRQ: |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 1071 | r = 1; |
| 1072 | break; |
Laurent Vivier | 542472b | 2008-05-30 16:05:55 +0200 | [diff] [blame] | 1073 | case KVM_CAP_COALESCED_MMIO: |
| 1074 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; |
| 1075 | break; |
Avi Kivity | 774ead3 | 2007-12-26 13:57:04 +0200 | [diff] [blame] | 1076 | case KVM_CAP_VAPIC: |
| 1077 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); |
| 1078 | break; |
Avi Kivity | f725230 | 2008-02-20 11:53:16 +0200 | [diff] [blame] | 1079 | case KVM_CAP_NR_VCPUS: |
| 1080 | r = KVM_MAX_VCPUS; |
| 1081 | break; |
Avi Kivity | a988b91 | 2008-02-20 11:59:20 +0200 | [diff] [blame] | 1082 | case KVM_CAP_NR_MEMSLOTS: |
| 1083 | r = KVM_MEMORY_SLOTS; |
| 1084 | break; |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 1085 | case KVM_CAP_PV_MMU: |
| 1086 | r = !tdp_enabled; |
| 1087 | break; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 1088 | case KVM_CAP_IOMMU: |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 1089 | r = iommu_found(); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 1090 | break; |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 1091 | default: |
| 1092 | r = 0; |
| 1093 | break; |
| 1094 | } |
| 1095 | return r; |
| 1096 | |
| 1097 | } |
| 1098 | |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 1099 | long kvm_arch_dev_ioctl(struct file *filp, |
| 1100 | unsigned int ioctl, unsigned long arg) |
| 1101 | { |
| 1102 | void __user *argp = (void __user *)arg; |
| 1103 | long r; |
| 1104 | |
| 1105 | switch (ioctl) { |
| 1106 | case KVM_GET_MSR_INDEX_LIST: { |
| 1107 | struct kvm_msr_list __user *user_msr_list = argp; |
| 1108 | struct kvm_msr_list msr_list; |
| 1109 | unsigned n; |
| 1110 | |
| 1111 | r = -EFAULT; |
| 1112 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) |
| 1113 | goto out; |
| 1114 | n = msr_list.nmsrs; |
| 1115 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
| 1116 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
| 1117 | goto out; |
| 1118 | r = -E2BIG; |
Jan Kiszka | e125e7b | 2009-07-02 21:45:47 +0200 | [diff] [blame] | 1119 | if (n < msr_list.nmsrs) |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 1120 | goto out; |
| 1121 | r = -EFAULT; |
| 1122 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, |
| 1123 | num_msrs_to_save * sizeof(u32))) |
| 1124 | goto out; |
Jan Kiszka | e125e7b | 2009-07-02 21:45:47 +0200 | [diff] [blame] | 1125 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 1126 | &emulated_msrs, |
| 1127 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) |
| 1128 | goto out; |
| 1129 | r = 0; |
| 1130 | break; |
| 1131 | } |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 1132 | case KVM_GET_SUPPORTED_CPUID: { |
| 1133 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
| 1134 | struct kvm_cpuid2 cpuid; |
| 1135 | |
| 1136 | r = -EFAULT; |
| 1137 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 1138 | goto out; |
| 1139 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1140 | cpuid_arg->entries); |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 1141 | if (r) |
| 1142 | goto out; |
| 1143 | |
| 1144 | r = -EFAULT; |
| 1145 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) |
| 1146 | goto out; |
| 1147 | r = 0; |
| 1148 | break; |
| 1149 | } |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 1150 | default: |
| 1151 | r = -EINVAL; |
| 1152 | } |
| 1153 | out: |
| 1154 | return r; |
| 1155 | } |
| 1156 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1157 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| 1158 | { |
| 1159 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 1160 | kvm_request_guest_time_update(vcpu); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1161 | } |
| 1162 | |
| 1163 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| 1164 | { |
| 1165 | kvm_x86_ops->vcpu_put(vcpu); |
Amit Shah | 9327fd1 | 2007-11-15 18:38:46 +0200 | [diff] [blame] | 1166 | kvm_put_guest_fpu(vcpu); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1167 | } |
| 1168 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1169 | static int is_efer_nx(void) |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1170 | { |
Avi Kivity | e286e86 | 2009-05-03 18:50:55 +0300 | [diff] [blame] | 1171 | unsigned long long efer = 0; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1172 | |
Avi Kivity | e286e86 | 2009-05-03 18:50:55 +0300 | [diff] [blame] | 1173 | rdmsrl_safe(MSR_EFER, &efer); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1174 | return efer & EFER_NX; |
| 1175 | } |
| 1176 | |
| 1177 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) |
| 1178 | { |
| 1179 | int i; |
| 1180 | struct kvm_cpuid_entry2 *e, *entry; |
| 1181 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1182 | entry = NULL; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1183 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
| 1184 | e = &vcpu->arch.cpuid_entries[i]; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1185 | if (e->function == 0x80000001) { |
| 1186 | entry = e; |
| 1187 | break; |
| 1188 | } |
| 1189 | } |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1190 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1191 | entry->edx &= ~(1 << 20); |
| 1192 | printk(KERN_INFO "kvm: guest NX capability removed\n"); |
| 1193 | } |
| 1194 | } |
| 1195 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1196 | /* when an old userspace process fills a new kernel module */ |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1197 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
| 1198 | struct kvm_cpuid *cpuid, |
| 1199 | struct kvm_cpuid_entry __user *entries) |
| 1200 | { |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1201 | int r, i; |
| 1202 | struct kvm_cpuid_entry *cpuid_entries; |
| 1203 | |
| 1204 | r = -E2BIG; |
| 1205 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
| 1206 | goto out; |
| 1207 | r = -ENOMEM; |
| 1208 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); |
| 1209 | if (!cpuid_entries) |
| 1210 | goto out; |
| 1211 | r = -EFAULT; |
| 1212 | if (copy_from_user(cpuid_entries, entries, |
| 1213 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) |
| 1214 | goto out_free; |
| 1215 | for (i = 0; i < cpuid->nent; i++) { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1216 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
| 1217 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; |
| 1218 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; |
| 1219 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; |
| 1220 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; |
| 1221 | vcpu->arch.cpuid_entries[i].index = 0; |
| 1222 | vcpu->arch.cpuid_entries[i].flags = 0; |
| 1223 | vcpu->arch.cpuid_entries[i].padding[0] = 0; |
| 1224 | vcpu->arch.cpuid_entries[i].padding[1] = 0; |
| 1225 | vcpu->arch.cpuid_entries[i].padding[2] = 0; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1226 | } |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1227 | vcpu->arch.cpuid_nent = cpuid->nent; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1228 | cpuid_fix_nx_cap(vcpu); |
| 1229 | r = 0; |
| 1230 | |
| 1231 | out_free: |
| 1232 | vfree(cpuid_entries); |
| 1233 | out: |
| 1234 | return r; |
| 1235 | } |
| 1236 | |
| 1237 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1238 | struct kvm_cpuid2 *cpuid, |
| 1239 | struct kvm_cpuid_entry2 __user *entries) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1240 | { |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1241 | int r; |
| 1242 | |
| 1243 | r = -E2BIG; |
| 1244 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
| 1245 | goto out; |
| 1246 | r = -EFAULT; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1247 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1248 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1249 | goto out; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1250 | vcpu->arch.cpuid_nent = cpuid->nent; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1251 | return 0; |
| 1252 | |
| 1253 | out: |
| 1254 | return r; |
| 1255 | } |
| 1256 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1257 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1258 | struct kvm_cpuid2 *cpuid, |
| 1259 | struct kvm_cpuid_entry2 __user *entries) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1260 | { |
| 1261 | int r; |
| 1262 | |
| 1263 | r = -E2BIG; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1264 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1265 | goto out; |
| 1266 | r = -EFAULT; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1267 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1268 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1269 | goto out; |
| 1270 | return 0; |
| 1271 | |
| 1272 | out: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1273 | cpuid->nent = vcpu->arch.cpuid_nent; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1274 | return r; |
| 1275 | } |
| 1276 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1277 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1278 | u32 index) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1279 | { |
| 1280 | entry->function = function; |
| 1281 | entry->index = index; |
| 1282 | cpuid_count(entry->function, entry->index, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1283 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1284 | entry->flags = 0; |
| 1285 | } |
| 1286 | |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1287 | #define F(x) bit(X86_FEATURE_##x) |
| 1288 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1289 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
| 1290 | u32 index, int *nent, int maxnent) |
| 1291 | { |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1292 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1293 | #ifdef CONFIG_X86_64 |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1294 | unsigned f_lm = F(LM); |
| 1295 | #else |
| 1296 | unsigned f_lm = 0; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1297 | #endif |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1298 | |
| 1299 | /* cpuid 1.edx */ |
| 1300 | const u32 kvm_supported_word0_x86_features = |
| 1301 | F(FPU) | F(VME) | F(DE) | F(PSE) | |
| 1302 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | |
| 1303 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | |
| 1304 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | |
| 1305 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | |
| 1306 | 0 /* Reserved, DS, ACPI */ | F(MMX) | |
| 1307 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | |
| 1308 | 0 /* HTT, TM, Reserved, PBE */; |
| 1309 | /* cpuid 0x80000001.edx */ |
| 1310 | const u32 kvm_supported_word1_x86_features = |
| 1311 | F(FPU) | F(VME) | F(DE) | F(PSE) | |
| 1312 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | |
| 1313 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | |
| 1314 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | |
| 1315 | F(PAT) | F(PSE36) | 0 /* Reserved */ | |
| 1316 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | |
| 1317 | F(FXSR) | F(FXSR_OPT) | 0 /* GBPAGES */ | 0 /* RDTSCP */ | |
| 1318 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); |
| 1319 | /* cpuid 1.ecx */ |
| 1320 | const u32 kvm_supported_word4_x86_features = |
Avi Kivity | d149c73 | 2009-05-10 14:41:56 +0300 | [diff] [blame] | 1321 | F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ | |
| 1322 | 0 /* DS-CPL, VMX, SMX, EST */ | |
| 1323 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | |
| 1324 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | |
| 1325 | 0 /* Reserved, DCA */ | F(XMM4_1) | |
| 1326 | F(XMM4_2) | 0 /* x2APIC */ | F(MOVBE) | F(POPCNT) | |
| 1327 | 0 /* Reserved, XSAVE, OSXSAVE */; |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1328 | /* cpuid 0x80000001.ecx */ |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1329 | const u32 kvm_supported_word6_x86_features = |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1330 | F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ | |
| 1331 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | |
| 1332 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) | |
| 1333 | 0 /* SKINIT */ | 0 /* WDT */; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1334 | |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1335 | /* all calls to cpuid_count() should be made on the same cpu */ |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1336 | get_cpu(); |
| 1337 | do_cpuid_1_ent(entry, function, index); |
| 1338 | ++*nent; |
| 1339 | |
| 1340 | switch (function) { |
| 1341 | case 0: |
| 1342 | entry->eax = min(entry->eax, (u32)0xb); |
| 1343 | break; |
| 1344 | case 1: |
| 1345 | entry->edx &= kvm_supported_word0_x86_features; |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1346 | entry->ecx &= kvm_supported_word4_x86_features; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1347 | break; |
| 1348 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands |
| 1349 | * may return different values. This forces us to get_cpu() before |
| 1350 | * issuing the first command, and also to emulate this annoying behavior |
| 1351 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ |
| 1352 | case 2: { |
| 1353 | int t, times = entry->eax & 0xff; |
| 1354 | |
| 1355 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; |
Nitin A Kamble | 0fdf8e5 | 2008-11-05 15:56:21 -0800 | [diff] [blame] | 1356 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1357 | for (t = 1; t < times && *nent < maxnent; ++t) { |
| 1358 | do_cpuid_1_ent(&entry[t], function, 0); |
| 1359 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; |
| 1360 | ++*nent; |
| 1361 | } |
| 1362 | break; |
| 1363 | } |
| 1364 | /* function 4 and 0xb have additional index. */ |
| 1365 | case 4: { |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1366 | int i, cache_type; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1367 | |
| 1368 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
| 1369 | /* read more entries until cache_type is zero */ |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1370 | for (i = 1; *nent < maxnent; ++i) { |
| 1371 | cache_type = entry[i - 1].eax & 0x1f; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1372 | if (!cache_type) |
| 1373 | break; |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1374 | do_cpuid_1_ent(&entry[i], function, i); |
| 1375 | entry[i].flags |= |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1376 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
| 1377 | ++*nent; |
| 1378 | } |
| 1379 | break; |
| 1380 | } |
| 1381 | case 0xb: { |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1382 | int i, level_type; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1383 | |
| 1384 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
| 1385 | /* read more entries until level_type is zero */ |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1386 | for (i = 1; *nent < maxnent; ++i) { |
Nitin A Kamble | 0853d2c | 2008-11-05 15:37:36 -0800 | [diff] [blame] | 1387 | level_type = entry[i - 1].ecx & 0xff00; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1388 | if (!level_type) |
| 1389 | break; |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1390 | do_cpuid_1_ent(&entry[i], function, i); |
| 1391 | entry[i].flags |= |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1392 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
| 1393 | ++*nent; |
| 1394 | } |
| 1395 | break; |
| 1396 | } |
| 1397 | case 0x80000000: |
| 1398 | entry->eax = min(entry->eax, 0x8000001a); |
| 1399 | break; |
| 1400 | case 0x80000001: |
| 1401 | entry->edx &= kvm_supported_word1_x86_features; |
| 1402 | entry->ecx &= kvm_supported_word6_x86_features; |
| 1403 | break; |
| 1404 | } |
| 1405 | put_cpu(); |
| 1406 | } |
| 1407 | |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1408 | #undef F |
| 1409 | |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 1410 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1411 | struct kvm_cpuid_entry2 __user *entries) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1412 | { |
| 1413 | struct kvm_cpuid_entry2 *cpuid_entries; |
| 1414 | int limit, nent = 0, r = -E2BIG; |
| 1415 | u32 func; |
| 1416 | |
| 1417 | if (cpuid->nent < 1) |
| 1418 | goto out; |
| 1419 | r = -ENOMEM; |
| 1420 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); |
| 1421 | if (!cpuid_entries) |
| 1422 | goto out; |
| 1423 | |
| 1424 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); |
| 1425 | limit = cpuid_entries[0].eax; |
| 1426 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) |
| 1427 | do_cpuid_ent(&cpuid_entries[nent], func, 0, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1428 | &nent, cpuid->nent); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1429 | r = -E2BIG; |
| 1430 | if (nent >= cpuid->nent) |
| 1431 | goto out_free; |
| 1432 | |
| 1433 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); |
| 1434 | limit = cpuid_entries[nent - 1].eax; |
| 1435 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) |
| 1436 | do_cpuid_ent(&cpuid_entries[nent], func, 0, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1437 | &nent, cpuid->nent); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1438 | r = -EFAULT; |
| 1439 | if (copy_to_user(entries, cpuid_entries, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1440 | nent * sizeof(struct kvm_cpuid_entry2))) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1441 | goto out_free; |
| 1442 | cpuid->nent = nent; |
| 1443 | r = 0; |
| 1444 | |
| 1445 | out_free: |
| 1446 | vfree(cpuid_entries); |
| 1447 | out: |
| 1448 | return r; |
| 1449 | } |
| 1450 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1451 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
| 1452 | struct kvm_lapic_state *s) |
| 1453 | { |
| 1454 | vcpu_load(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1455 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1456 | vcpu_put(vcpu); |
| 1457 | |
| 1458 | return 0; |
| 1459 | } |
| 1460 | |
| 1461 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, |
| 1462 | struct kvm_lapic_state *s) |
| 1463 | { |
| 1464 | vcpu_load(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1465 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1466 | kvm_apic_post_state_restore(vcpu); |
| 1467 | vcpu_put(vcpu); |
| 1468 | |
| 1469 | return 0; |
| 1470 | } |
| 1471 | |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 1472 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
| 1473 | struct kvm_interrupt *irq) |
| 1474 | { |
| 1475 | if (irq->irq < 0 || irq->irq >= 256) |
| 1476 | return -EINVAL; |
| 1477 | if (irqchip_in_kernel(vcpu->kvm)) |
| 1478 | return -ENXIO; |
| 1479 | vcpu_load(vcpu); |
| 1480 | |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 1481 | kvm_queue_interrupt(vcpu, irq->irq, false); |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 1482 | |
| 1483 | vcpu_put(vcpu); |
| 1484 | |
| 1485 | return 0; |
| 1486 | } |
| 1487 | |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 1488 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
| 1489 | { |
| 1490 | vcpu_load(vcpu); |
| 1491 | kvm_inject_nmi(vcpu); |
| 1492 | vcpu_put(vcpu); |
| 1493 | |
| 1494 | return 0; |
| 1495 | } |
| 1496 | |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1497 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
| 1498 | struct kvm_tpr_access_ctl *tac) |
| 1499 | { |
| 1500 | if (tac->flags) |
| 1501 | return -EINVAL; |
| 1502 | vcpu->arch.tpr_access_reporting = !!tac->enabled; |
| 1503 | return 0; |
| 1504 | } |
| 1505 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1506 | long kvm_arch_vcpu_ioctl(struct file *filp, |
| 1507 | unsigned int ioctl, unsigned long arg) |
| 1508 | { |
| 1509 | struct kvm_vcpu *vcpu = filp->private_data; |
| 1510 | void __user *argp = (void __user *)arg; |
| 1511 | int r; |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1512 | struct kvm_lapic_state *lapic = NULL; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1513 | |
| 1514 | switch (ioctl) { |
| 1515 | case KVM_GET_LAPIC: { |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1516 | lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1517 | |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1518 | r = -ENOMEM; |
| 1519 | if (!lapic) |
| 1520 | goto out; |
| 1521 | r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1522 | if (r) |
| 1523 | goto out; |
| 1524 | r = -EFAULT; |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1525 | if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state))) |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1526 | goto out; |
| 1527 | r = 0; |
| 1528 | break; |
| 1529 | } |
| 1530 | case KVM_SET_LAPIC: { |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1531 | lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
| 1532 | r = -ENOMEM; |
| 1533 | if (!lapic) |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1534 | goto out; |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1535 | r = -EFAULT; |
| 1536 | if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state))) |
| 1537 | goto out; |
| 1538 | r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1539 | if (r) |
| 1540 | goto out; |
| 1541 | r = 0; |
| 1542 | break; |
| 1543 | } |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 1544 | case KVM_INTERRUPT: { |
| 1545 | struct kvm_interrupt irq; |
| 1546 | |
| 1547 | r = -EFAULT; |
| 1548 | if (copy_from_user(&irq, argp, sizeof irq)) |
| 1549 | goto out; |
| 1550 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
| 1551 | if (r) |
| 1552 | goto out; |
| 1553 | r = 0; |
| 1554 | break; |
| 1555 | } |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 1556 | case KVM_NMI: { |
| 1557 | r = kvm_vcpu_ioctl_nmi(vcpu); |
| 1558 | if (r) |
| 1559 | goto out; |
| 1560 | r = 0; |
| 1561 | break; |
| 1562 | } |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1563 | case KVM_SET_CPUID: { |
| 1564 | struct kvm_cpuid __user *cpuid_arg = argp; |
| 1565 | struct kvm_cpuid cpuid; |
| 1566 | |
| 1567 | r = -EFAULT; |
| 1568 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 1569 | goto out; |
| 1570 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); |
| 1571 | if (r) |
| 1572 | goto out; |
| 1573 | break; |
| 1574 | } |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1575 | case KVM_SET_CPUID2: { |
| 1576 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
| 1577 | struct kvm_cpuid2 cpuid; |
| 1578 | |
| 1579 | r = -EFAULT; |
| 1580 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 1581 | goto out; |
| 1582 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1583 | cpuid_arg->entries); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1584 | if (r) |
| 1585 | goto out; |
| 1586 | break; |
| 1587 | } |
| 1588 | case KVM_GET_CPUID2: { |
| 1589 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
| 1590 | struct kvm_cpuid2 cpuid; |
| 1591 | |
| 1592 | r = -EFAULT; |
| 1593 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 1594 | goto out; |
| 1595 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1596 | cpuid_arg->entries); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1597 | if (r) |
| 1598 | goto out; |
| 1599 | r = -EFAULT; |
| 1600 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) |
| 1601 | goto out; |
| 1602 | r = 0; |
| 1603 | break; |
| 1604 | } |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1605 | case KVM_GET_MSRS: |
| 1606 | r = msr_io(vcpu, argp, kvm_get_msr, 1); |
| 1607 | break; |
| 1608 | case KVM_SET_MSRS: |
| 1609 | r = msr_io(vcpu, argp, do_set_msr, 0); |
| 1610 | break; |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1611 | case KVM_TPR_ACCESS_REPORTING: { |
| 1612 | struct kvm_tpr_access_ctl tac; |
| 1613 | |
| 1614 | r = -EFAULT; |
| 1615 | if (copy_from_user(&tac, argp, sizeof tac)) |
| 1616 | goto out; |
| 1617 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); |
| 1618 | if (r) |
| 1619 | goto out; |
| 1620 | r = -EFAULT; |
| 1621 | if (copy_to_user(argp, &tac, sizeof tac)) |
| 1622 | goto out; |
| 1623 | r = 0; |
| 1624 | break; |
| 1625 | }; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1626 | case KVM_SET_VAPIC_ADDR: { |
| 1627 | struct kvm_vapic_addr va; |
| 1628 | |
| 1629 | r = -EINVAL; |
| 1630 | if (!irqchip_in_kernel(vcpu->kvm)) |
| 1631 | goto out; |
| 1632 | r = -EFAULT; |
| 1633 | if (copy_from_user(&va, argp, sizeof va)) |
| 1634 | goto out; |
| 1635 | r = 0; |
| 1636 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
| 1637 | break; |
| 1638 | } |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1639 | default: |
| 1640 | r = -EINVAL; |
| 1641 | } |
| 1642 | out: |
Wei Yongjun | 7a6ce84 | 2009-03-31 16:47:44 +0800 | [diff] [blame] | 1643 | kfree(lapic); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1644 | return r; |
| 1645 | } |
| 1646 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1647 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
| 1648 | { |
| 1649 | int ret; |
| 1650 | |
| 1651 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) |
| 1652 | return -1; |
| 1653 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
| 1654 | return ret; |
| 1655 | } |
| 1656 | |
| 1657 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
| 1658 | u32 kvm_nr_mmu_pages) |
| 1659 | { |
| 1660 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) |
| 1661 | return -EINVAL; |
| 1662 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1663 | down_write(&kvm->slots_lock); |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 1664 | spin_lock(&kvm->mmu_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1665 | |
| 1666 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); |
Zhang Xiantao | f05e70a | 2007-12-14 10:01:48 +0800 | [diff] [blame] | 1667 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1668 | |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 1669 | spin_unlock(&kvm->mmu_lock); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1670 | up_write(&kvm->slots_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1671 | return 0; |
| 1672 | } |
| 1673 | |
| 1674 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) |
| 1675 | { |
Zhang Xiantao | f05e70a | 2007-12-14 10:01:48 +0800 | [diff] [blame] | 1676 | return kvm->arch.n_alloc_mmu_pages; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1677 | } |
| 1678 | |
Zhang Xiantao | e9f85cd | 2007-11-22 11:20:33 +0800 | [diff] [blame] | 1679 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
| 1680 | { |
| 1681 | int i; |
| 1682 | struct kvm_mem_alias *alias; |
| 1683 | |
Zhang Xiantao | d69fb81 | 2007-12-14 09:54:20 +0800 | [diff] [blame] | 1684 | for (i = 0; i < kvm->arch.naliases; ++i) { |
| 1685 | alias = &kvm->arch.aliases[i]; |
Zhang Xiantao | e9f85cd | 2007-11-22 11:20:33 +0800 | [diff] [blame] | 1686 | if (gfn >= alias->base_gfn |
| 1687 | && gfn < alias->base_gfn + alias->npages) |
| 1688 | return alias->target_gfn + gfn - alias->base_gfn; |
| 1689 | } |
| 1690 | return gfn; |
| 1691 | } |
| 1692 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1693 | /* |
| 1694 | * Set a new alias region. Aliases map a portion of physical memory into |
| 1695 | * another portion. This is useful for memory windows, for example the PC |
| 1696 | * VGA region. |
| 1697 | */ |
| 1698 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, |
| 1699 | struct kvm_memory_alias *alias) |
| 1700 | { |
| 1701 | int r, n; |
| 1702 | struct kvm_mem_alias *p; |
| 1703 | |
| 1704 | r = -EINVAL; |
| 1705 | /* General sanity checks */ |
| 1706 | if (alias->memory_size & (PAGE_SIZE - 1)) |
| 1707 | goto out; |
| 1708 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) |
| 1709 | goto out; |
| 1710 | if (alias->slot >= KVM_ALIAS_SLOTS) |
| 1711 | goto out; |
| 1712 | if (alias->guest_phys_addr + alias->memory_size |
| 1713 | < alias->guest_phys_addr) |
| 1714 | goto out; |
| 1715 | if (alias->target_phys_addr + alias->memory_size |
| 1716 | < alias->target_phys_addr) |
| 1717 | goto out; |
| 1718 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1719 | down_write(&kvm->slots_lock); |
Andrea Arcangeli | a1708ce | 2008-07-25 16:26:39 +0200 | [diff] [blame] | 1720 | spin_lock(&kvm->mmu_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1721 | |
Zhang Xiantao | d69fb81 | 2007-12-14 09:54:20 +0800 | [diff] [blame] | 1722 | p = &kvm->arch.aliases[alias->slot]; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1723 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
| 1724 | p->npages = alias->memory_size >> PAGE_SHIFT; |
| 1725 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; |
| 1726 | |
| 1727 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) |
Zhang Xiantao | d69fb81 | 2007-12-14 09:54:20 +0800 | [diff] [blame] | 1728 | if (kvm->arch.aliases[n - 1].npages) |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1729 | break; |
Zhang Xiantao | d69fb81 | 2007-12-14 09:54:20 +0800 | [diff] [blame] | 1730 | kvm->arch.naliases = n; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1731 | |
Andrea Arcangeli | a1708ce | 2008-07-25 16:26:39 +0200 | [diff] [blame] | 1732 | spin_unlock(&kvm->mmu_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1733 | kvm_mmu_zap_all(kvm); |
| 1734 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1735 | up_write(&kvm->slots_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1736 | |
| 1737 | return 0; |
| 1738 | |
| 1739 | out: |
| 1740 | return r; |
| 1741 | } |
| 1742 | |
| 1743 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
| 1744 | { |
| 1745 | int r; |
| 1746 | |
| 1747 | r = 0; |
| 1748 | switch (chip->chip_id) { |
| 1749 | case KVM_IRQCHIP_PIC_MASTER: |
| 1750 | memcpy(&chip->chip.pic, |
| 1751 | &pic_irqchip(kvm)->pics[0], |
| 1752 | sizeof(struct kvm_pic_state)); |
| 1753 | break; |
| 1754 | case KVM_IRQCHIP_PIC_SLAVE: |
| 1755 | memcpy(&chip->chip.pic, |
| 1756 | &pic_irqchip(kvm)->pics[1], |
| 1757 | sizeof(struct kvm_pic_state)); |
| 1758 | break; |
| 1759 | case KVM_IRQCHIP_IOAPIC: |
| 1760 | memcpy(&chip->chip.ioapic, |
| 1761 | ioapic_irqchip(kvm), |
| 1762 | sizeof(struct kvm_ioapic_state)); |
| 1763 | break; |
| 1764 | default: |
| 1765 | r = -EINVAL; |
| 1766 | break; |
| 1767 | } |
| 1768 | return r; |
| 1769 | } |
| 1770 | |
| 1771 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
| 1772 | { |
| 1773 | int r; |
| 1774 | |
| 1775 | r = 0; |
| 1776 | switch (chip->chip_id) { |
| 1777 | case KVM_IRQCHIP_PIC_MASTER: |
| 1778 | memcpy(&pic_irqchip(kvm)->pics[0], |
| 1779 | &chip->chip.pic, |
| 1780 | sizeof(struct kvm_pic_state)); |
| 1781 | break; |
| 1782 | case KVM_IRQCHIP_PIC_SLAVE: |
| 1783 | memcpy(&pic_irqchip(kvm)->pics[1], |
| 1784 | &chip->chip.pic, |
| 1785 | sizeof(struct kvm_pic_state)); |
| 1786 | break; |
| 1787 | case KVM_IRQCHIP_IOAPIC: |
| 1788 | memcpy(ioapic_irqchip(kvm), |
| 1789 | &chip->chip.ioapic, |
| 1790 | sizeof(struct kvm_ioapic_state)); |
| 1791 | break; |
| 1792 | default: |
| 1793 | r = -EINVAL; |
| 1794 | break; |
| 1795 | } |
| 1796 | kvm_pic_update_irq(pic_irqchip(kvm)); |
| 1797 | return r; |
| 1798 | } |
| 1799 | |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 1800 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
| 1801 | { |
| 1802 | int r = 0; |
| 1803 | |
| 1804 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
| 1805 | return r; |
| 1806 | } |
| 1807 | |
| 1808 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
| 1809 | { |
| 1810 | int r = 0; |
| 1811 | |
| 1812 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
| 1813 | kvm_pit_load_count(kvm, 0, ps->channels[0].count); |
| 1814 | return r; |
| 1815 | } |
| 1816 | |
Marcelo Tosatti | 52d939a | 2008-12-30 15:55:06 -0200 | [diff] [blame] | 1817 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
| 1818 | struct kvm_reinject_control *control) |
| 1819 | { |
| 1820 | if (!kvm->arch.vpit) |
| 1821 | return -ENXIO; |
| 1822 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
| 1823 | return 0; |
| 1824 | } |
| 1825 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 1826 | /* |
| 1827 | * Get (and clear) the dirty memory log for a memory slot. |
| 1828 | */ |
| 1829 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
| 1830 | struct kvm_dirty_log *log) |
| 1831 | { |
| 1832 | int r; |
| 1833 | int n; |
| 1834 | struct kvm_memory_slot *memslot; |
| 1835 | int is_dirty = 0; |
| 1836 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1837 | down_write(&kvm->slots_lock); |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 1838 | |
| 1839 | r = kvm_get_dirty_log(kvm, log, &is_dirty); |
| 1840 | if (r) |
| 1841 | goto out; |
| 1842 | |
| 1843 | /* If nothing is dirty, don't bother messing with page tables. */ |
| 1844 | if (is_dirty) { |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 1845 | spin_lock(&kvm->mmu_lock); |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 1846 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 1847 | spin_unlock(&kvm->mmu_lock); |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 1848 | kvm_flush_remote_tlbs(kvm); |
| 1849 | memslot = &kvm->memslots[log->slot]; |
| 1850 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
| 1851 | memset(memslot->dirty_bitmap, 0, n); |
| 1852 | } |
| 1853 | r = 0; |
| 1854 | out: |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1855 | up_write(&kvm->slots_lock); |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 1856 | return r; |
| 1857 | } |
| 1858 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1859 | long kvm_arch_vm_ioctl(struct file *filp, |
| 1860 | unsigned int ioctl, unsigned long arg) |
| 1861 | { |
| 1862 | struct kvm *kvm = filp->private_data; |
| 1863 | void __user *argp = (void __user *)arg; |
| 1864 | int r = -EINVAL; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 1865 | /* |
| 1866 | * This union makes it completely explicit to gcc-3.x |
| 1867 | * that these two variables' stack usage should be |
| 1868 | * combined, not added together. |
| 1869 | */ |
| 1870 | union { |
| 1871 | struct kvm_pit_state ps; |
| 1872 | struct kvm_memory_alias alias; |
| 1873 | } u; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1874 | |
| 1875 | switch (ioctl) { |
| 1876 | case KVM_SET_TSS_ADDR: |
| 1877 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); |
| 1878 | if (r < 0) |
| 1879 | goto out; |
| 1880 | break; |
| 1881 | case KVM_SET_MEMORY_REGION: { |
| 1882 | struct kvm_memory_region kvm_mem; |
| 1883 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 1884 | |
| 1885 | r = -EFAULT; |
| 1886 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) |
| 1887 | goto out; |
| 1888 | kvm_userspace_mem.slot = kvm_mem.slot; |
| 1889 | kvm_userspace_mem.flags = kvm_mem.flags; |
| 1890 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; |
| 1891 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; |
| 1892 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); |
| 1893 | if (r) |
| 1894 | goto out; |
| 1895 | break; |
| 1896 | } |
| 1897 | case KVM_SET_NR_MMU_PAGES: |
| 1898 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); |
| 1899 | if (r) |
| 1900 | goto out; |
| 1901 | break; |
| 1902 | case KVM_GET_NR_MMU_PAGES: |
| 1903 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); |
| 1904 | break; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 1905 | case KVM_SET_MEMORY_ALIAS: |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1906 | r = -EFAULT; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 1907 | if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias))) |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1908 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 1909 | r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1910 | if (r) |
| 1911 | goto out; |
| 1912 | break; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1913 | case KVM_CREATE_IRQCHIP: |
| 1914 | r = -ENOMEM; |
Zhang Xiantao | d7deeeb0 | 2007-12-14 10:17:34 +0800 | [diff] [blame] | 1915 | kvm->arch.vpic = kvm_create_pic(kvm); |
| 1916 | if (kvm->arch.vpic) { |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1917 | r = kvm_ioapic_init(kvm); |
| 1918 | if (r) { |
Zhang Xiantao | d7deeeb0 | 2007-12-14 10:17:34 +0800 | [diff] [blame] | 1919 | kfree(kvm->arch.vpic); |
| 1920 | kvm->arch.vpic = NULL; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1921 | goto out; |
| 1922 | } |
| 1923 | } else |
| 1924 | goto out; |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 1925 | r = kvm_setup_default_irq_routing(kvm); |
| 1926 | if (r) { |
| 1927 | kfree(kvm->arch.vpic); |
| 1928 | kfree(kvm->arch.vioapic); |
| 1929 | goto out; |
| 1930 | } |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1931 | break; |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 1932 | case KVM_CREATE_PIT: |
Avi Kivity | 269e05e | 2009-01-05 15:21:42 +0200 | [diff] [blame] | 1933 | mutex_lock(&kvm->lock); |
| 1934 | r = -EEXIST; |
| 1935 | if (kvm->arch.vpit) |
| 1936 | goto create_pit_unlock; |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 1937 | r = -ENOMEM; |
| 1938 | kvm->arch.vpit = kvm_create_pit(kvm); |
| 1939 | if (kvm->arch.vpit) |
| 1940 | r = 0; |
Avi Kivity | 269e05e | 2009-01-05 15:21:42 +0200 | [diff] [blame] | 1941 | create_pit_unlock: |
| 1942 | mutex_unlock(&kvm->lock); |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 1943 | break; |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 1944 | case KVM_IRQ_LINE_STATUS: |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1945 | case KVM_IRQ_LINE: { |
| 1946 | struct kvm_irq_level irq_event; |
| 1947 | |
| 1948 | r = -EFAULT; |
| 1949 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) |
| 1950 | goto out; |
| 1951 | if (irqchip_in_kernel(kvm)) { |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 1952 | __s32 status; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1953 | mutex_lock(&kvm->lock); |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 1954 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
| 1955 | irq_event.irq, irq_event.level); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1956 | mutex_unlock(&kvm->lock); |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 1957 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
| 1958 | irq_event.status = status; |
| 1959 | if (copy_to_user(argp, &irq_event, |
| 1960 | sizeof irq_event)) |
| 1961 | goto out; |
| 1962 | } |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1963 | r = 0; |
| 1964 | } |
| 1965 | break; |
| 1966 | } |
| 1967 | case KVM_GET_IRQCHIP: { |
| 1968 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 1969 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1970 | |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 1971 | r = -ENOMEM; |
| 1972 | if (!chip) |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1973 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 1974 | r = -EFAULT; |
| 1975 | if (copy_from_user(chip, argp, sizeof *chip)) |
| 1976 | goto get_irqchip_out; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1977 | r = -ENXIO; |
| 1978 | if (!irqchip_in_kernel(kvm)) |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 1979 | goto get_irqchip_out; |
| 1980 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); |
| 1981 | if (r) |
| 1982 | goto get_irqchip_out; |
| 1983 | r = -EFAULT; |
| 1984 | if (copy_to_user(argp, chip, sizeof *chip)) |
| 1985 | goto get_irqchip_out; |
| 1986 | r = 0; |
| 1987 | get_irqchip_out: |
| 1988 | kfree(chip); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1989 | if (r) |
| 1990 | goto out; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1991 | break; |
| 1992 | } |
| 1993 | case KVM_SET_IRQCHIP: { |
| 1994 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 1995 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1996 | |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 1997 | r = -ENOMEM; |
| 1998 | if (!chip) |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1999 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2000 | r = -EFAULT; |
| 2001 | if (copy_from_user(chip, argp, sizeof *chip)) |
| 2002 | goto set_irqchip_out; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2003 | r = -ENXIO; |
| 2004 | if (!irqchip_in_kernel(kvm)) |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2005 | goto set_irqchip_out; |
| 2006 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); |
| 2007 | if (r) |
| 2008 | goto set_irqchip_out; |
| 2009 | r = 0; |
| 2010 | set_irqchip_out: |
| 2011 | kfree(chip); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2012 | if (r) |
| 2013 | goto out; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2014 | break; |
| 2015 | } |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2016 | case KVM_GET_PIT: { |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2017 | r = -EFAULT; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2018 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2019 | goto out; |
| 2020 | r = -ENXIO; |
| 2021 | if (!kvm->arch.vpit) |
| 2022 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2023 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2024 | if (r) |
| 2025 | goto out; |
| 2026 | r = -EFAULT; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2027 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2028 | goto out; |
| 2029 | r = 0; |
| 2030 | break; |
| 2031 | } |
| 2032 | case KVM_SET_PIT: { |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2033 | r = -EFAULT; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2034 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2035 | goto out; |
| 2036 | r = -ENXIO; |
| 2037 | if (!kvm->arch.vpit) |
| 2038 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2039 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2040 | if (r) |
| 2041 | goto out; |
| 2042 | r = 0; |
| 2043 | break; |
| 2044 | } |
Marcelo Tosatti | 52d939a | 2008-12-30 15:55:06 -0200 | [diff] [blame] | 2045 | case KVM_REINJECT_CONTROL: { |
| 2046 | struct kvm_reinject_control control; |
| 2047 | r = -EFAULT; |
| 2048 | if (copy_from_user(&control, argp, sizeof(control))) |
| 2049 | goto out; |
| 2050 | r = kvm_vm_ioctl_reinject(kvm, &control); |
| 2051 | if (r) |
| 2052 | goto out; |
| 2053 | r = 0; |
| 2054 | break; |
| 2055 | } |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2056 | default: |
| 2057 | ; |
| 2058 | } |
| 2059 | out: |
| 2060 | return r; |
| 2061 | } |
| 2062 | |
Zhang Xiantao | a16b043 | 2007-11-16 14:38:21 +0800 | [diff] [blame] | 2063 | static void kvm_init_msr_list(void) |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2064 | { |
| 2065 | u32 dummy[2]; |
| 2066 | unsigned i, j; |
| 2067 | |
| 2068 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { |
| 2069 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
| 2070 | continue; |
| 2071 | if (j < i) |
| 2072 | msrs_to_save[j] = msrs_to_save[i]; |
| 2073 | j++; |
| 2074 | } |
| 2075 | num_msrs_to_save = j; |
| 2076 | } |
| 2077 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2078 | /* |
| 2079 | * Only apic need an MMIO device hook, so shortcut now.. |
| 2080 | */ |
| 2081 | static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu, |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2082 | gpa_t addr, int len, |
| 2083 | int is_write) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2084 | { |
| 2085 | struct kvm_io_device *dev; |
| 2086 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2087 | if (vcpu->arch.apic) { |
| 2088 | dev = &vcpu->arch.apic->dev; |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2089 | if (dev->in_range(dev, addr, len, is_write)) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2090 | return dev; |
| 2091 | } |
| 2092 | return NULL; |
| 2093 | } |
| 2094 | |
| 2095 | |
| 2096 | static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2097 | gpa_t addr, int len, |
| 2098 | int is_write) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2099 | { |
| 2100 | struct kvm_io_device *dev; |
| 2101 | |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2102 | dev = vcpu_find_pervcpu_dev(vcpu, addr, len, is_write); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2103 | if (dev == NULL) |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2104 | dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, |
| 2105 | is_write); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2106 | return dev; |
| 2107 | } |
| 2108 | |
Hannes Eder | cded19f | 2009-02-21 02:19:13 +0100 | [diff] [blame] | 2109 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, |
| 2110 | struct kvm_vcpu *vcpu) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2111 | { |
| 2112 | void *data = val; |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2113 | int r = X86EMUL_CONTINUE; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2114 | |
| 2115 | while (bytes) { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2116 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2117 | unsigned offset = addr & (PAGE_SIZE-1); |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2118 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2119 | int ret; |
| 2120 | |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2121 | if (gpa == UNMAPPED_GVA) { |
| 2122 | r = X86EMUL_PROPAGATE_FAULT; |
| 2123 | goto out; |
| 2124 | } |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2125 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2126 | if (ret < 0) { |
| 2127 | r = X86EMUL_UNHANDLEABLE; |
| 2128 | goto out; |
| 2129 | } |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2130 | |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2131 | bytes -= toread; |
| 2132 | data += toread; |
| 2133 | addr += toread; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2134 | } |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2135 | out: |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2136 | return r; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2137 | } |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2138 | |
Hannes Eder | cded19f | 2009-02-21 02:19:13 +0100 | [diff] [blame] | 2139 | static int kvm_write_guest_virt(gva_t addr, void *val, unsigned int bytes, |
| 2140 | struct kvm_vcpu *vcpu) |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2141 | { |
| 2142 | void *data = val; |
| 2143 | int r = X86EMUL_CONTINUE; |
| 2144 | |
| 2145 | while (bytes) { |
| 2146 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
| 2147 | unsigned offset = addr & (PAGE_SIZE-1); |
| 2148 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); |
| 2149 | int ret; |
| 2150 | |
| 2151 | if (gpa == UNMAPPED_GVA) { |
| 2152 | r = X86EMUL_PROPAGATE_FAULT; |
| 2153 | goto out; |
| 2154 | } |
| 2155 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); |
| 2156 | if (ret < 0) { |
| 2157 | r = X86EMUL_UNHANDLEABLE; |
| 2158 | goto out; |
| 2159 | } |
| 2160 | |
| 2161 | bytes -= towrite; |
| 2162 | data += towrite; |
| 2163 | addr += towrite; |
| 2164 | } |
| 2165 | out: |
| 2166 | return r; |
| 2167 | } |
| 2168 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2169 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2170 | static int emulator_read_emulated(unsigned long addr, |
| 2171 | void *val, |
| 2172 | unsigned int bytes, |
| 2173 | struct kvm_vcpu *vcpu) |
| 2174 | { |
| 2175 | struct kvm_io_device *mmio_dev; |
| 2176 | gpa_t gpa; |
| 2177 | |
| 2178 | if (vcpu->mmio_read_completed) { |
| 2179 | memcpy(val, vcpu->mmio_data, bytes); |
| 2180 | vcpu->mmio_read_completed = 0; |
| 2181 | return X86EMUL_CONTINUE; |
| 2182 | } |
| 2183 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2184 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2185 | |
| 2186 | /* For APIC access vmexit */ |
| 2187 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) |
| 2188 | goto mmio; |
| 2189 | |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2190 | if (kvm_read_guest_virt(addr, val, bytes, vcpu) |
| 2191 | == X86EMUL_CONTINUE) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2192 | return X86EMUL_CONTINUE; |
| 2193 | if (gpa == UNMAPPED_GVA) |
| 2194 | return X86EMUL_PROPAGATE_FAULT; |
| 2195 | |
| 2196 | mmio: |
| 2197 | /* |
| 2198 | * Is this MMIO handled locally? |
| 2199 | */ |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2200 | mutex_lock(&vcpu->kvm->lock); |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2201 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 0); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2202 | if (mmio_dev) { |
| 2203 | kvm_iodevice_read(mmio_dev, gpa, bytes, val); |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2204 | mutex_unlock(&vcpu->kvm->lock); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2205 | return X86EMUL_CONTINUE; |
| 2206 | } |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2207 | mutex_unlock(&vcpu->kvm->lock); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2208 | |
| 2209 | vcpu->mmio_needed = 1; |
| 2210 | vcpu->mmio_phys_addr = gpa; |
| 2211 | vcpu->mmio_size = bytes; |
| 2212 | vcpu->mmio_is_write = 0; |
| 2213 | |
| 2214 | return X86EMUL_UNHANDLEABLE; |
| 2215 | } |
| 2216 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 2217 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
Avi Kivity | 9f81128 | 2008-03-02 14:06:05 +0200 | [diff] [blame] | 2218 | const void *val, int bytes) |
| 2219 | { |
| 2220 | int ret; |
| 2221 | |
| 2222 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); |
| 2223 | if (ret < 0) |
| 2224 | return 0; |
Marcelo Tosatti | ad218f8 | 2008-12-01 22:32:05 -0200 | [diff] [blame] | 2225 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
Avi Kivity | 9f81128 | 2008-03-02 14:06:05 +0200 | [diff] [blame] | 2226 | return 1; |
| 2227 | } |
| 2228 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2229 | static int emulator_write_emulated_onepage(unsigned long addr, |
| 2230 | const void *val, |
| 2231 | unsigned int bytes, |
| 2232 | struct kvm_vcpu *vcpu) |
| 2233 | { |
| 2234 | struct kvm_io_device *mmio_dev; |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2235 | gpa_t gpa; |
| 2236 | |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2237 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2238 | |
| 2239 | if (gpa == UNMAPPED_GVA) { |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 2240 | kvm_inject_page_fault(vcpu, addr, 2); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2241 | return X86EMUL_PROPAGATE_FAULT; |
| 2242 | } |
| 2243 | |
| 2244 | /* For APIC access vmexit */ |
| 2245 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) |
| 2246 | goto mmio; |
| 2247 | |
| 2248 | if (emulator_write_phys(vcpu, gpa, val, bytes)) |
| 2249 | return X86EMUL_CONTINUE; |
| 2250 | |
| 2251 | mmio: |
| 2252 | /* |
| 2253 | * Is this MMIO handled locally? |
| 2254 | */ |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2255 | mutex_lock(&vcpu->kvm->lock); |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2256 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 1); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2257 | if (mmio_dev) { |
| 2258 | kvm_iodevice_write(mmio_dev, gpa, bytes, val); |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2259 | mutex_unlock(&vcpu->kvm->lock); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2260 | return X86EMUL_CONTINUE; |
| 2261 | } |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2262 | mutex_unlock(&vcpu->kvm->lock); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2263 | |
| 2264 | vcpu->mmio_needed = 1; |
| 2265 | vcpu->mmio_phys_addr = gpa; |
| 2266 | vcpu->mmio_size = bytes; |
| 2267 | vcpu->mmio_is_write = 1; |
| 2268 | memcpy(vcpu->mmio_data, val, bytes); |
| 2269 | |
| 2270 | return X86EMUL_CONTINUE; |
| 2271 | } |
| 2272 | |
| 2273 | int emulator_write_emulated(unsigned long addr, |
| 2274 | const void *val, |
| 2275 | unsigned int bytes, |
| 2276 | struct kvm_vcpu *vcpu) |
| 2277 | { |
| 2278 | /* Crossing a page boundary? */ |
| 2279 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { |
| 2280 | int rc, now; |
| 2281 | |
| 2282 | now = -addr & ~PAGE_MASK; |
| 2283 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); |
| 2284 | if (rc != X86EMUL_CONTINUE) |
| 2285 | return rc; |
| 2286 | addr += now; |
| 2287 | val += now; |
| 2288 | bytes -= now; |
| 2289 | } |
| 2290 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); |
| 2291 | } |
| 2292 | EXPORT_SYMBOL_GPL(emulator_write_emulated); |
| 2293 | |
| 2294 | static int emulator_cmpxchg_emulated(unsigned long addr, |
| 2295 | const void *old, |
| 2296 | const void *new, |
| 2297 | unsigned int bytes, |
| 2298 | struct kvm_vcpu *vcpu) |
| 2299 | { |
Marcin Slusarz | 9f51e24 | 2009-08-09 21:54:00 +0200 | [diff] [blame] | 2300 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2301 | #ifndef CONFIG_X86_64 |
| 2302 | /* guests cmpxchg8b have to be emulated atomically */ |
| 2303 | if (bytes == 8) { |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2304 | gpa_t gpa; |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2305 | struct page *page; |
Andrew Morton | c0b49b0 | 2008-02-04 22:27:18 -0800 | [diff] [blame] | 2306 | char *kaddr; |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2307 | u64 val; |
| 2308 | |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2309 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
| 2310 | |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2311 | if (gpa == UNMAPPED_GVA || |
| 2312 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) |
| 2313 | goto emul_write; |
| 2314 | |
| 2315 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
| 2316 | goto emul_write; |
| 2317 | |
| 2318 | val = *(u64 *)new; |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 2319 | |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2320 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 2321 | |
Andrew Morton | c0b49b0 | 2008-02-04 22:27:18 -0800 | [diff] [blame] | 2322 | kaddr = kmap_atomic(page, KM_USER0); |
| 2323 | set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val); |
| 2324 | kunmap_atomic(kaddr, KM_USER0); |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2325 | kvm_release_page_dirty(page); |
| 2326 | } |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 2327 | emul_write: |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2328 | #endif |
| 2329 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2330 | return emulator_write_emulated(addr, new, bytes, vcpu); |
| 2331 | } |
| 2332 | |
| 2333 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
| 2334 | { |
| 2335 | return kvm_x86_ops->get_segment_base(vcpu, seg); |
| 2336 | } |
| 2337 | |
| 2338 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) |
| 2339 | { |
Marcelo Tosatti | a705289 | 2008-09-23 13:18:35 -0300 | [diff] [blame] | 2340 | kvm_mmu_invlpg(vcpu, address); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2341 | return X86EMUL_CONTINUE; |
| 2342 | } |
| 2343 | |
| 2344 | int emulate_clts(struct kvm_vcpu *vcpu) |
| 2345 | { |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 2346 | KVMTRACE_0D(CLTS, vcpu, handler); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2347 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2348 | return X86EMUL_CONTINUE; |
| 2349 | } |
| 2350 | |
| 2351 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) |
| 2352 | { |
| 2353 | struct kvm_vcpu *vcpu = ctxt->vcpu; |
| 2354 | |
| 2355 | switch (dr) { |
| 2356 | case 0 ... 3: |
| 2357 | *dest = kvm_x86_ops->get_dr(vcpu, dr); |
| 2358 | return X86EMUL_CONTINUE; |
| 2359 | default: |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 2360 | pr_unimpl(vcpu, "%s: unexpected dr %u\n", __func__, dr); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2361 | return X86EMUL_UNHANDLEABLE; |
| 2362 | } |
| 2363 | } |
| 2364 | |
| 2365 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) |
| 2366 | { |
| 2367 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; |
| 2368 | int exception; |
| 2369 | |
| 2370 | kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); |
| 2371 | if (exception) { |
| 2372 | /* FIXME: better handling */ |
| 2373 | return X86EMUL_UNHANDLEABLE; |
| 2374 | } |
| 2375 | return X86EMUL_CONTINUE; |
| 2376 | } |
| 2377 | |
| 2378 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) |
| 2379 | { |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2380 | u8 opcodes[4]; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2381 | unsigned long rip = kvm_rip_read(vcpu); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2382 | unsigned long rip_linear; |
| 2383 | |
Avi Kivity | f76c710 | 2008-06-13 22:45:42 +0300 | [diff] [blame] | 2384 | if (!printk_ratelimit()) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2385 | return; |
| 2386 | |
Glauber Costa | 25be460 | 2008-06-10 10:46:53 -0300 | [diff] [blame] | 2387 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); |
| 2388 | |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2389 | kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2390 | |
| 2391 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", |
| 2392 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2393 | } |
| 2394 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); |
| 2395 | |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 2396 | static struct x86_emulate_ops emulate_ops = { |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2397 | .read_std = kvm_read_guest_virt, |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2398 | .read_emulated = emulator_read_emulated, |
| 2399 | .write_emulated = emulator_write_emulated, |
| 2400 | .cmpxchg_emulated = emulator_cmpxchg_emulated, |
| 2401 | }; |
| 2402 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2403 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
| 2404 | { |
| 2405 | kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 2406 | kvm_register_read(vcpu, VCPU_REGS_RSP); |
| 2407 | kvm_register_read(vcpu, VCPU_REGS_RIP); |
| 2408 | vcpu->arch.regs_dirty = ~0; |
| 2409 | } |
| 2410 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2411 | int emulate_instruction(struct kvm_vcpu *vcpu, |
| 2412 | struct kvm_run *run, |
| 2413 | unsigned long cr2, |
| 2414 | u16 error_code, |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 2415 | int emulation_type) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2416 | { |
Glauber Costa | 310b5d3 | 2009-05-12 16:21:06 -0400 | [diff] [blame] | 2417 | int r, shadow_mask; |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 2418 | struct decode_cache *c; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2419 | |
Avi Kivity | 26eef70 | 2008-07-03 14:59:22 +0300 | [diff] [blame] | 2420 | kvm_clear_exception_queue(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2421 | vcpu->arch.mmio_fault_cr2 = cr2; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2422 | /* |
| 2423 | * TODO: fix x86_emulate.c to use guest_read/write_register |
| 2424 | * instead of direct ->regs accesses, can save hundred cycles |
| 2425 | * on Intel for instructions that don't read/change RSP, for |
| 2426 | * for example. |
| 2427 | */ |
| 2428 | cache_all_regs(vcpu); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2429 | |
| 2430 | vcpu->mmio_is_write = 0; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2431 | vcpu->arch.pio.string = 0; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2432 | |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 2433 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2434 | int cs_db, cs_l; |
| 2435 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
| 2436 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2437 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
| 2438 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); |
| 2439 | vcpu->arch.emulate_ctxt.mode = |
| 2440 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2441 | ? X86EMUL_MODE_REAL : cs_l |
| 2442 | ? X86EMUL_MODE_PROT64 : cs_db |
| 2443 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; |
| 2444 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2445 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 2446 | |
| 2447 | /* Reject the instructions other than VMCALL/VMMCALL when |
| 2448 | * try to emulate invalid opcode */ |
| 2449 | c = &vcpu->arch.emulate_ctxt.decode; |
| 2450 | if ((emulation_type & EMULTYPE_TRAP_UD) && |
| 2451 | (!(c->twobyte && c->b == 0x01 && |
| 2452 | (c->modrm_reg == 0 || c->modrm_reg == 3) && |
| 2453 | c->modrm_mod == 3 && c->modrm_rm == 1))) |
| 2454 | return EMULATE_FAIL; |
| 2455 | |
Avi Kivity | f2b5756 | 2007-11-18 15:17:51 +0200 | [diff] [blame] | 2456 | ++vcpu->stat.insn_emulation; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2457 | if (r) { |
Avi Kivity | f2b5756 | 2007-11-18 15:17:51 +0200 | [diff] [blame] | 2458 | ++vcpu->stat.insn_emulation_fail; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2459 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
| 2460 | return EMULATE_DONE; |
| 2461 | return EMULATE_FAIL; |
| 2462 | } |
| 2463 | } |
| 2464 | |
Gleb Natapov | ba8afb6 | 2009-04-12 13:36:57 +0300 | [diff] [blame] | 2465 | if (emulation_type & EMULTYPE_SKIP) { |
| 2466 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip); |
| 2467 | return EMULATE_DONE; |
| 2468 | } |
| 2469 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2470 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
Glauber Costa | 310b5d3 | 2009-05-12 16:21:06 -0400 | [diff] [blame] | 2471 | shadow_mask = vcpu->arch.emulate_ctxt.interruptibility; |
| 2472 | |
| 2473 | if (r == 0) |
| 2474 | kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2475 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2476 | if (vcpu->arch.pio.string) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2477 | return EMULATE_DO_MMIO; |
| 2478 | |
| 2479 | if ((r || vcpu->mmio_is_write) && run) { |
| 2480 | run->exit_reason = KVM_EXIT_MMIO; |
| 2481 | run->mmio.phys_addr = vcpu->mmio_phys_addr; |
| 2482 | memcpy(run->mmio.data, vcpu->mmio_data, 8); |
| 2483 | run->mmio.len = vcpu->mmio_size; |
| 2484 | run->mmio.is_write = vcpu->mmio_is_write; |
| 2485 | } |
| 2486 | |
| 2487 | if (r) { |
| 2488 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
| 2489 | return EMULATE_DONE; |
| 2490 | if (!vcpu->mmio_needed) { |
| 2491 | kvm_report_emulation_failure(vcpu, "mmio"); |
| 2492 | return EMULATE_FAIL; |
| 2493 | } |
| 2494 | return EMULATE_DO_MMIO; |
| 2495 | } |
| 2496 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2497 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2498 | |
| 2499 | if (vcpu->mmio_is_write) { |
| 2500 | vcpu->mmio_needed = 0; |
| 2501 | return EMULATE_DO_MMIO; |
| 2502 | } |
| 2503 | |
| 2504 | return EMULATE_DONE; |
| 2505 | } |
| 2506 | EXPORT_SYMBOL_GPL(emulate_instruction); |
| 2507 | |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2508 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
| 2509 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2510 | void *p = vcpu->arch.pio_data; |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2511 | gva_t q = vcpu->arch.pio.guest_gva; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2512 | unsigned bytes; |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2513 | int ret; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2514 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2515 | bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count; |
| 2516 | if (vcpu->arch.pio.in) |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2517 | ret = kvm_write_guest_virt(q, p, bytes, vcpu); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2518 | else |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2519 | ret = kvm_read_guest_virt(q, p, bytes, vcpu); |
| 2520 | return ret; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2521 | } |
| 2522 | |
| 2523 | int complete_pio(struct kvm_vcpu *vcpu) |
| 2524 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2525 | struct kvm_pio_request *io = &vcpu->arch.pio; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2526 | long delta; |
| 2527 | int r; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2528 | unsigned long val; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2529 | |
| 2530 | if (!io->string) { |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2531 | if (io->in) { |
| 2532 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 2533 | memcpy(&val, vcpu->arch.pio_data, io->size); |
| 2534 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); |
| 2535 | } |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2536 | } else { |
| 2537 | if (io->in) { |
| 2538 | r = pio_copy_data(vcpu); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2539 | if (r) |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2540 | return r; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2541 | } |
| 2542 | |
| 2543 | delta = 1; |
| 2544 | if (io->rep) { |
| 2545 | delta *= io->cur_count; |
| 2546 | /* |
| 2547 | * The size of the register should really depend on |
| 2548 | * current address size. |
| 2549 | */ |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2550 | val = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 2551 | val -= delta; |
| 2552 | kvm_register_write(vcpu, VCPU_REGS_RCX, val); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2553 | } |
| 2554 | if (io->down) |
| 2555 | delta = -delta; |
| 2556 | delta *= io->size; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2557 | if (io->in) { |
| 2558 | val = kvm_register_read(vcpu, VCPU_REGS_RDI); |
| 2559 | val += delta; |
| 2560 | kvm_register_write(vcpu, VCPU_REGS_RDI, val); |
| 2561 | } else { |
| 2562 | val = kvm_register_read(vcpu, VCPU_REGS_RSI); |
| 2563 | val += delta; |
| 2564 | kvm_register_write(vcpu, VCPU_REGS_RSI, val); |
| 2565 | } |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2566 | } |
| 2567 | |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2568 | io->count -= io->cur_count; |
| 2569 | io->cur_count = 0; |
| 2570 | |
| 2571 | return 0; |
| 2572 | } |
| 2573 | |
| 2574 | static void kernel_pio(struct kvm_io_device *pio_dev, |
| 2575 | struct kvm_vcpu *vcpu, |
| 2576 | void *pd) |
| 2577 | { |
| 2578 | /* TODO: String I/O for in kernel device */ |
| 2579 | |
| 2580 | mutex_lock(&vcpu->kvm->lock); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2581 | if (vcpu->arch.pio.in) |
| 2582 | kvm_iodevice_read(pio_dev, vcpu->arch.pio.port, |
| 2583 | vcpu->arch.pio.size, |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2584 | pd); |
| 2585 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2586 | kvm_iodevice_write(pio_dev, vcpu->arch.pio.port, |
| 2587 | vcpu->arch.pio.size, |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2588 | pd); |
| 2589 | mutex_unlock(&vcpu->kvm->lock); |
| 2590 | } |
| 2591 | |
| 2592 | static void pio_string_write(struct kvm_io_device *pio_dev, |
| 2593 | struct kvm_vcpu *vcpu) |
| 2594 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2595 | struct kvm_pio_request *io = &vcpu->arch.pio; |
| 2596 | void *pd = vcpu->arch.pio_data; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2597 | int i; |
| 2598 | |
| 2599 | mutex_lock(&vcpu->kvm->lock); |
| 2600 | for (i = 0; i < io->cur_count; i++) { |
| 2601 | kvm_iodevice_write(pio_dev, io->port, |
| 2602 | io->size, |
| 2603 | pd); |
| 2604 | pd += io->size; |
| 2605 | } |
| 2606 | mutex_unlock(&vcpu->kvm->lock); |
| 2607 | } |
| 2608 | |
| 2609 | static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu, |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2610 | gpa_t addr, int len, |
| 2611 | int is_write) |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2612 | { |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2613 | return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr, len, is_write); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2614 | } |
| 2615 | |
| 2616 | int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, |
| 2617 | int size, unsigned port) |
| 2618 | { |
| 2619 | struct kvm_io_device *pio_dev; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2620 | unsigned long val; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2621 | |
| 2622 | vcpu->run->exit_reason = KVM_EXIT_IO; |
| 2623 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2624 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2625 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2626 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1; |
| 2627 | vcpu->run->io.port = vcpu->arch.pio.port = port; |
| 2628 | vcpu->arch.pio.in = in; |
| 2629 | vcpu->arch.pio.string = 0; |
| 2630 | vcpu->arch.pio.down = 0; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2631 | vcpu->arch.pio.rep = 0; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2632 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2633 | if (vcpu->run->io.direction == KVM_EXIT_IO_IN) |
| 2634 | KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size, |
| 2635 | handler); |
| 2636 | else |
| 2637 | KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size, |
| 2638 | handler); |
| 2639 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2640 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 2641 | memcpy(vcpu->arch.pio_data, &val, 4); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2642 | |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2643 | pio_dev = vcpu_find_pio_dev(vcpu, port, size, !in); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2644 | if (pio_dev) { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2645 | kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2646 | complete_pio(vcpu); |
| 2647 | return 1; |
| 2648 | } |
| 2649 | return 0; |
| 2650 | } |
| 2651 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); |
| 2652 | |
| 2653 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, |
| 2654 | int size, unsigned long count, int down, |
| 2655 | gva_t address, int rep, unsigned port) |
| 2656 | { |
| 2657 | unsigned now, in_page; |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2658 | int ret = 0; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2659 | struct kvm_io_device *pio_dev; |
| 2660 | |
| 2661 | vcpu->run->exit_reason = KVM_EXIT_IO; |
| 2662 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2663 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2664 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2665 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count; |
| 2666 | vcpu->run->io.port = vcpu->arch.pio.port = port; |
| 2667 | vcpu->arch.pio.in = in; |
| 2668 | vcpu->arch.pio.string = 1; |
| 2669 | vcpu->arch.pio.down = down; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2670 | vcpu->arch.pio.rep = rep; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2671 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2672 | if (vcpu->run->io.direction == KVM_EXIT_IO_IN) |
| 2673 | KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size, |
| 2674 | handler); |
| 2675 | else |
| 2676 | KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size, |
| 2677 | handler); |
| 2678 | |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2679 | if (!count) { |
| 2680 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
| 2681 | return 1; |
| 2682 | } |
| 2683 | |
| 2684 | if (!down) |
| 2685 | in_page = PAGE_SIZE - offset_in_page(address); |
| 2686 | else |
| 2687 | in_page = offset_in_page(address) + size; |
| 2688 | now = min(count, (unsigned long)in_page / size); |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2689 | if (!now) |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2690 | now = 1; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2691 | if (down) { |
| 2692 | /* |
| 2693 | * String I/O in reverse. Yuck. Kill the guest, fix later. |
| 2694 | */ |
| 2695 | pr_unimpl(vcpu, "guest string pio down\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 2696 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2697 | return 1; |
| 2698 | } |
| 2699 | vcpu->run->io.count = now; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2700 | vcpu->arch.pio.cur_count = now; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2701 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2702 | if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count) |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2703 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
| 2704 | |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2705 | vcpu->arch.pio.guest_gva = address; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2706 | |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2707 | pio_dev = vcpu_find_pio_dev(vcpu, port, |
| 2708 | vcpu->arch.pio.cur_count, |
| 2709 | !vcpu->arch.pio.in); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2710 | if (!vcpu->arch.pio.in) { |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2711 | /* string PIO write */ |
| 2712 | ret = pio_copy_data(vcpu); |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2713 | if (ret == X86EMUL_PROPAGATE_FAULT) { |
| 2714 | kvm_inject_gp(vcpu, 0); |
| 2715 | return 1; |
| 2716 | } |
| 2717 | if (ret == 0 && pio_dev) { |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2718 | pio_string_write(pio_dev, vcpu); |
| 2719 | complete_pio(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2720 | if (vcpu->arch.pio.count == 0) |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2721 | ret = 1; |
| 2722 | } |
| 2723 | } else if (pio_dev) |
| 2724 | pr_unimpl(vcpu, "no string pio read support yet, " |
| 2725 | "port %x size %d count %ld\n", |
| 2726 | port, size, count); |
| 2727 | |
| 2728 | return ret; |
| 2729 | } |
| 2730 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); |
| 2731 | |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 2732 | static void bounce_off(void *info) |
| 2733 | { |
| 2734 | /* nothing */ |
| 2735 | } |
| 2736 | |
| 2737 | static unsigned int ref_freq; |
| 2738 | static unsigned long tsc_khz_ref; |
| 2739 | |
| 2740 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
| 2741 | void *data) |
| 2742 | { |
| 2743 | struct cpufreq_freqs *freq = data; |
| 2744 | struct kvm *kvm; |
| 2745 | struct kvm_vcpu *vcpu; |
| 2746 | int i, send_ipi = 0; |
| 2747 | |
| 2748 | if (!ref_freq) |
| 2749 | ref_freq = freq->old; |
| 2750 | |
| 2751 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
| 2752 | return 0; |
| 2753 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) |
| 2754 | return 0; |
| 2755 | per_cpu(cpu_tsc_khz, freq->cpu) = cpufreq_scale(tsc_khz_ref, ref_freq, freq->new); |
| 2756 | |
| 2757 | spin_lock(&kvm_lock); |
| 2758 | list_for_each_entry(kvm, &vm_list, vm_list) { |
| 2759 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| 2760 | vcpu = kvm->vcpus[i]; |
| 2761 | if (!vcpu) |
| 2762 | continue; |
| 2763 | if (vcpu->cpu != freq->cpu) |
| 2764 | continue; |
| 2765 | if (!kvm_request_guest_time_update(vcpu)) |
| 2766 | continue; |
| 2767 | if (vcpu->cpu != smp_processor_id()) |
| 2768 | send_ipi++; |
| 2769 | } |
| 2770 | } |
| 2771 | spin_unlock(&kvm_lock); |
| 2772 | |
| 2773 | if (freq->old < freq->new && send_ipi) { |
| 2774 | /* |
| 2775 | * We upscale the frequency. Must make the guest |
| 2776 | * doesn't see old kvmclock values while running with |
| 2777 | * the new frequency, otherwise we risk the guest sees |
| 2778 | * time go backwards. |
| 2779 | * |
| 2780 | * In case we update the frequency for another cpu |
| 2781 | * (which might be in guest context) send an interrupt |
| 2782 | * to kick the cpu out of guest context. Next time |
| 2783 | * guest context is entered kvmclock will be updated, |
| 2784 | * so the guest will not see stale values. |
| 2785 | */ |
| 2786 | smp_call_function_single(freq->cpu, bounce_off, NULL, 1); |
| 2787 | } |
| 2788 | return 0; |
| 2789 | } |
| 2790 | |
| 2791 | static struct notifier_block kvmclock_cpufreq_notifier_block = { |
| 2792 | .notifier_call = kvmclock_cpufreq_notifier |
| 2793 | }; |
| 2794 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2795 | int kvm_arch_init(void *opaque) |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2796 | { |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 2797 | int r, cpu; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2798 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
| 2799 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2800 | if (kvm_x86_ops) { |
| 2801 | printk(KERN_ERR "kvm: already loaded the other module\n"); |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 2802 | r = -EEXIST; |
| 2803 | goto out; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2804 | } |
| 2805 | |
| 2806 | if (!ops->cpu_has_kvm_support()) { |
| 2807 | printk(KERN_ERR "kvm: no hardware support\n"); |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 2808 | r = -EOPNOTSUPP; |
| 2809 | goto out; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2810 | } |
| 2811 | if (ops->disabled_by_bios()) { |
| 2812 | printk(KERN_ERR "kvm: disabled by bios\n"); |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 2813 | r = -EOPNOTSUPP; |
| 2814 | goto out; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2815 | } |
| 2816 | |
Avi Kivity | 97db56c | 2008-01-13 13:23:56 +0200 | [diff] [blame] | 2817 | r = kvm_mmu_module_init(); |
| 2818 | if (r) |
| 2819 | goto out; |
| 2820 | |
| 2821 | kvm_init_msr_list(); |
| 2822 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2823 | kvm_x86_ops = ops; |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 2824 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
Sheng Yang | 7b52345 | 2008-04-25 21:13:50 +0800 | [diff] [blame] | 2825 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
| 2826 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
Sheng Yang | 4b12f0d | 2009-04-27 20:35:42 +0800 | [diff] [blame] | 2827 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 2828 | |
| 2829 | for_each_possible_cpu(cpu) |
| 2830 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; |
| 2831 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
| 2832 | tsc_khz_ref = tsc_khz; |
| 2833 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
| 2834 | CPUFREQ_TRANSITION_NOTIFIER); |
| 2835 | } |
| 2836 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2837 | return 0; |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 2838 | |
| 2839 | out: |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 2840 | return r; |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2841 | } |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2842 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2843 | void kvm_arch_exit(void) |
| 2844 | { |
Jan Kiszka | 888d256 | 2009-04-17 19:24:58 +0200 | [diff] [blame] | 2845 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
| 2846 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, |
| 2847 | CPUFREQ_TRANSITION_NOTIFIER); |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2848 | kvm_x86_ops = NULL; |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 2849 | kvm_mmu_module_exit(); |
| 2850 | } |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2851 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2852 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
| 2853 | { |
| 2854 | ++vcpu->stat.halt_exits; |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2855 | KVMTRACE_0D(HLT, vcpu, handler); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2856 | if (irqchip_in_kernel(vcpu->kvm)) { |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 2857 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2858 | return 1; |
| 2859 | } else { |
| 2860 | vcpu->run->exit_reason = KVM_EXIT_HLT; |
| 2861 | return 0; |
| 2862 | } |
| 2863 | } |
| 2864 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); |
| 2865 | |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 2866 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
| 2867 | unsigned long a1) |
| 2868 | { |
| 2869 | if (is_long_mode(vcpu)) |
| 2870 | return a0; |
| 2871 | else |
| 2872 | return a0 | ((gpa_t)a1 << 32); |
| 2873 | } |
| 2874 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2875 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
| 2876 | { |
| 2877 | unsigned long nr, a0, a1, a2, a3, ret; |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 2878 | int r = 1; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2879 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2880 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 2881 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); |
| 2882 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 2883 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); |
| 2884 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2885 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2886 | KVMTRACE_1D(VMMCALL, vcpu, (u32)nr, handler); |
| 2887 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2888 | if (!is_long_mode(vcpu)) { |
| 2889 | nr &= 0xFFFFFFFF; |
| 2890 | a0 &= 0xFFFFFFFF; |
| 2891 | a1 &= 0xFFFFFFFF; |
| 2892 | a2 &= 0xFFFFFFFF; |
| 2893 | a3 &= 0xFFFFFFFF; |
| 2894 | } |
| 2895 | |
| 2896 | switch (nr) { |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 2897 | case KVM_HC_VAPIC_POLL_IRQ: |
| 2898 | ret = 0; |
| 2899 | break; |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 2900 | case KVM_HC_MMU_OP: |
| 2901 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); |
| 2902 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2903 | default: |
| 2904 | ret = -KVM_ENOSYS; |
| 2905 | break; |
| 2906 | } |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2907 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
Amit Shah | f11c3a8 | 2008-02-21 01:00:30 +0530 | [diff] [blame] | 2908 | ++vcpu->stat.hypercalls; |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 2909 | return r; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2910 | } |
| 2911 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); |
| 2912 | |
| 2913 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) |
| 2914 | { |
| 2915 | char instruction[3]; |
| 2916 | int ret = 0; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2917 | unsigned long rip = kvm_rip_read(vcpu); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2918 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2919 | |
| 2920 | /* |
| 2921 | * Blow out the MMU to ensure that no other VCPU has an active mapping |
| 2922 | * to ensure that the updated hypercall appears atomically across all |
| 2923 | * VCPUs. |
| 2924 | */ |
| 2925 | kvm_mmu_zap_all(vcpu->kvm); |
| 2926 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2927 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2928 | if (emulator_write_emulated(rip, instruction, 3, vcpu) |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2929 | != X86EMUL_CONTINUE) |
| 2930 | ret = -EFAULT; |
| 2931 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2932 | return ret; |
| 2933 | } |
| 2934 | |
| 2935 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
| 2936 | { |
| 2937 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
| 2938 | } |
| 2939 | |
| 2940 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) |
| 2941 | { |
| 2942 | struct descriptor_table dt = { limit, base }; |
| 2943 | |
| 2944 | kvm_x86_ops->set_gdt(vcpu, &dt); |
| 2945 | } |
| 2946 | |
| 2947 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) |
| 2948 | { |
| 2949 | struct descriptor_table dt = { limit, base }; |
| 2950 | |
| 2951 | kvm_x86_ops->set_idt(vcpu, &dt); |
| 2952 | } |
| 2953 | |
| 2954 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, |
| 2955 | unsigned long *rflags) |
| 2956 | { |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 2957 | kvm_lmsw(vcpu, msw); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2958 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
| 2959 | } |
| 2960 | |
| 2961 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) |
| 2962 | { |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 2963 | unsigned long value; |
| 2964 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2965 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
| 2966 | switch (cr) { |
| 2967 | case 0: |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 2968 | value = vcpu->arch.cr0; |
| 2969 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2970 | case 2: |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 2971 | value = vcpu->arch.cr2; |
| 2972 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2973 | case 3: |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 2974 | value = vcpu->arch.cr3; |
| 2975 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2976 | case 4: |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 2977 | value = vcpu->arch.cr4; |
| 2978 | break; |
Joerg Roedel | 152ff9b | 2007-12-06 15:46:52 +0100 | [diff] [blame] | 2979 | case 8: |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 2980 | value = kvm_get_cr8(vcpu); |
| 2981 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2982 | default: |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 2983 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2984 | return 0; |
| 2985 | } |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 2986 | KVMTRACE_3D(CR_READ, vcpu, (u32)cr, (u32)value, |
| 2987 | (u32)((u64)value >> 32), handler); |
| 2988 | |
| 2989 | return value; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2990 | } |
| 2991 | |
| 2992 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, |
| 2993 | unsigned long *rflags) |
| 2994 | { |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 2995 | KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr, (u32)val, |
| 2996 | (u32)((u64)val >> 32), handler); |
| 2997 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 2998 | switch (cr) { |
| 2999 | case 0: |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3000 | kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val)); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3001 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
| 3002 | break; |
| 3003 | case 2: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3004 | vcpu->arch.cr2 = val; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3005 | break; |
| 3006 | case 3: |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3007 | kvm_set_cr3(vcpu, val); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3008 | break; |
| 3009 | case 4: |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3010 | kvm_set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val)); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3011 | break; |
Joerg Roedel | 152ff9b | 2007-12-06 15:46:52 +0100 | [diff] [blame] | 3012 | case 8: |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3013 | kvm_set_cr8(vcpu, val & 0xfUL); |
Joerg Roedel | 152ff9b | 2007-12-06 15:46:52 +0100 | [diff] [blame] | 3014 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3015 | default: |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 3016 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3017 | } |
| 3018 | } |
| 3019 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3020 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
| 3021 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3022 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
| 3023 | int j, nent = vcpu->arch.cpuid_nent; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3024 | |
| 3025 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; |
| 3026 | /* when no next entry is found, the current entry[i] is reselected */ |
Nitin A Kamble | 0fdf8e5 | 2008-11-05 15:56:21 -0800 | [diff] [blame] | 3027 | for (j = i + 1; ; j = (j + 1) % nent) { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3028 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3029 | if (ej->function == e->function) { |
| 3030 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
| 3031 | return j; |
| 3032 | } |
| 3033 | } |
| 3034 | return 0; /* silence gcc, even though control never reaches here */ |
| 3035 | } |
| 3036 | |
| 3037 | /* find an entry with matching function, matching index (if needed), and that |
| 3038 | * should be read next (if it's stateful) */ |
| 3039 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, |
| 3040 | u32 function, u32 index) |
| 3041 | { |
| 3042 | if (e->function != function) |
| 3043 | return 0; |
| 3044 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) |
| 3045 | return 0; |
| 3046 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 3047 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3048 | return 0; |
| 3049 | return 1; |
| 3050 | } |
| 3051 | |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 3052 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
| 3053 | u32 function, u32 index) |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3054 | { |
| 3055 | int i; |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 3056 | struct kvm_cpuid_entry2 *best = NULL; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3057 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3058 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 3059 | struct kvm_cpuid_entry2 *e; |
| 3060 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3061 | e = &vcpu->arch.cpuid_entries[i]; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3062 | if (is_matching_cpuid_entry(e, function, index)) { |
| 3063 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) |
| 3064 | move_to_next_stateful_cpuid_entry(vcpu, i); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3065 | best = e; |
| 3066 | break; |
| 3067 | } |
| 3068 | /* |
| 3069 | * Both basic or both extended? |
| 3070 | */ |
| 3071 | if (((e->function ^ function) & 0x80000000) == 0) |
| 3072 | if (!best || e->function > best->function) |
| 3073 | best = e; |
| 3074 | } |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 3075 | return best; |
| 3076 | } |
| 3077 | |
Dong, Eddie | 82725b2 | 2009-03-30 16:21:08 +0800 | [diff] [blame] | 3078 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
| 3079 | { |
| 3080 | struct kvm_cpuid_entry2 *best; |
| 3081 | |
| 3082 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); |
| 3083 | if (best) |
| 3084 | return best->eax & 0xff; |
| 3085 | return 36; |
| 3086 | } |
| 3087 | |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 3088 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
| 3089 | { |
| 3090 | u32 function, index; |
| 3091 | struct kvm_cpuid_entry2 *best; |
| 3092 | |
| 3093 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 3094 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 3095 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); |
| 3096 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); |
| 3097 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); |
| 3098 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); |
| 3099 | best = kvm_find_cpuid_entry(vcpu, function, index); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3100 | if (best) { |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3101 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
| 3102 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); |
| 3103 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); |
| 3104 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3105 | } |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3106 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 3107 | KVMTRACE_5D(CPUID, vcpu, function, |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3108 | (u32)kvm_register_read(vcpu, VCPU_REGS_RAX), |
| 3109 | (u32)kvm_register_read(vcpu, VCPU_REGS_RBX), |
| 3110 | (u32)kvm_register_read(vcpu, VCPU_REGS_RCX), |
| 3111 | (u32)kvm_register_read(vcpu, VCPU_REGS_RDX), handler); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3112 | } |
| 3113 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 3114 | |
| 3115 | /* |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3116 | * Check if userspace requested an interrupt window, and that the |
| 3117 | * interrupt window is open. |
| 3118 | * |
| 3119 | * No need to exit to userspace if we already have an interrupt queued. |
| 3120 | */ |
| 3121 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu, |
| 3122 | struct kvm_run *kvm_run) |
| 3123 | { |
Gleb Natapov | 8061823 | 2009-04-21 17:44:56 +0300 | [diff] [blame] | 3124 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3125 | kvm_run->request_interrupt_window && |
Gleb Natapov | 5df5664 | 2009-04-21 17:44:59 +0300 | [diff] [blame] | 3126 | kvm_arch_interrupt_allowed(vcpu)); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3127 | } |
| 3128 | |
| 3129 | static void post_kvm_run_save(struct kvm_vcpu *vcpu, |
| 3130 | struct kvm_run *kvm_run) |
| 3131 | { |
| 3132 | kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3133 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3134 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
Jan Kiszka | 4531220 | 2008-12-11 16:54:54 +0100 | [diff] [blame] | 3135 | if (irqchip_in_kernel(vcpu->kvm)) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3136 | kvm_run->ready_for_interrupt_injection = 1; |
Jan Kiszka | 4531220 | 2008-12-11 16:54:54 +0100 | [diff] [blame] | 3137 | else |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3138 | kvm_run->ready_for_interrupt_injection = |
Gleb Natapov | fa9726b | 2009-05-11 13:35:47 +0300 | [diff] [blame] | 3139 | kvm_arch_interrupt_allowed(vcpu) && |
| 3140 | !kvm_cpu_has_interrupt(vcpu) && |
| 3141 | !kvm_event_needs_reinjection(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3142 | } |
| 3143 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3144 | static void vapic_enter(struct kvm_vcpu *vcpu) |
| 3145 | { |
| 3146 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 3147 | struct page *page; |
| 3148 | |
| 3149 | if (!apic || !apic->vapic_addr) |
| 3150 | return; |
| 3151 | |
| 3152 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 3153 | |
| 3154 | vcpu->arch.apic->vapic_page = page; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3155 | } |
| 3156 | |
| 3157 | static void vapic_exit(struct kvm_vcpu *vcpu) |
| 3158 | { |
| 3159 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 3160 | |
| 3161 | if (!apic || !apic->vapic_addr) |
| 3162 | return; |
| 3163 | |
Marcelo Tosatti | f8b78fa | 2008-06-23 12:04:25 -0300 | [diff] [blame] | 3164 | down_read(&vcpu->kvm->slots_lock); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3165 | kvm_release_page_dirty(apic->vapic_page); |
| 3166 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); |
Marcelo Tosatti | f8b78fa | 2008-06-23 12:04:25 -0300 | [diff] [blame] | 3167 | up_read(&vcpu->kvm->slots_lock); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3168 | } |
| 3169 | |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3170 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
| 3171 | { |
| 3172 | int max_irr, tpr; |
| 3173 | |
| 3174 | if (!kvm_x86_ops->update_cr8_intercept) |
| 3175 | return; |
| 3176 | |
Gleb Natapov | 8db3baa | 2009-05-11 13:35:54 +0300 | [diff] [blame] | 3177 | if (!vcpu->arch.apic->vapic_addr) |
| 3178 | max_irr = kvm_lapic_find_highest_irr(vcpu); |
| 3179 | else |
| 3180 | max_irr = -1; |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3181 | |
| 3182 | if (max_irr != -1) |
| 3183 | max_irr >>= 4; |
| 3184 | |
| 3185 | tpr = kvm_lapic_get_cr8(vcpu); |
| 3186 | |
| 3187 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); |
| 3188 | } |
| 3189 | |
Gleb Natapov | 6a8b1d1 | 2009-05-11 13:35:51 +0300 | [diff] [blame] | 3190 | static void inject_pending_irq(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3191 | { |
Gleb Natapov | 6a8b1d1 | 2009-05-11 13:35:51 +0300 | [diff] [blame] | 3192 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
| 3193 | kvm_x86_ops->set_interrupt_shadow(vcpu, 0); |
| 3194 | |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3195 | /* try to reinject previous events if any */ |
| 3196 | if (vcpu->arch.nmi_injected) { |
| 3197 | kvm_x86_ops->set_nmi(vcpu); |
| 3198 | return; |
| 3199 | } |
| 3200 | |
| 3201 | if (vcpu->arch.interrupt.pending) { |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 3202 | kvm_x86_ops->set_irq(vcpu); |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3203 | return; |
| 3204 | } |
| 3205 | |
| 3206 | /* try to inject new event if pending */ |
| 3207 | if (vcpu->arch.nmi_pending) { |
| 3208 | if (kvm_x86_ops->nmi_allowed(vcpu)) { |
| 3209 | vcpu->arch.nmi_pending = false; |
| 3210 | vcpu->arch.nmi_injected = true; |
| 3211 | kvm_x86_ops->set_nmi(vcpu); |
| 3212 | } |
| 3213 | } else if (kvm_cpu_has_interrupt(vcpu)) { |
| 3214 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 3215 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
| 3216 | false); |
| 3217 | kvm_x86_ops->set_irq(vcpu); |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3218 | } |
| 3219 | } |
| 3220 | } |
| 3221 | |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3222 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3223 | { |
| 3224 | int r; |
Gleb Natapov | 6a8b1d1 | 2009-05-11 13:35:51 +0300 | [diff] [blame] | 3225 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
| 3226 | kvm_run->request_interrupt_window; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3227 | |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 3228 | if (vcpu->requests) |
| 3229 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) |
| 3230 | kvm_mmu_unload(vcpu); |
| 3231 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3232 | r = kvm_mmu_reload(vcpu); |
| 3233 | if (unlikely(r)) |
| 3234 | goto out; |
| 3235 | |
Avi Kivity | 2f52d58 | 2008-01-16 12:49:30 +0200 | [diff] [blame] | 3236 | if (vcpu->requests) { |
| 3237 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) |
Marcelo Tosatti | 2f59971 | 2008-05-27 12:10:20 -0300 | [diff] [blame] | 3238 | __kvm_migrate_timers(vcpu); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 3239 | if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests)) |
| 3240 | kvm_write_guest_time(vcpu); |
Marcelo Tosatti | 4731d4c | 2008-09-23 13:18:39 -0300 | [diff] [blame] | 3241 | if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests)) |
| 3242 | kvm_mmu_sync_roots(vcpu); |
Marcelo Tosatti | d4acf7e | 2008-06-06 16:37:35 -0300 | [diff] [blame] | 3243 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
| 3244 | kvm_x86_ops->tlb_flush(vcpu); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3245 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
| 3246 | &vcpu->requests)) { |
| 3247 | kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS; |
| 3248 | r = 0; |
| 3249 | goto out; |
| 3250 | } |
Joerg Roedel | 71c4dfa | 2008-02-26 16:49:16 +0100 | [diff] [blame] | 3251 | if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) { |
| 3252 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; |
| 3253 | r = 0; |
| 3254 | goto out; |
| 3255 | } |
Avi Kivity | 2f52d58 | 2008-01-16 12:49:30 +0200 | [diff] [blame] | 3256 | } |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3257 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3258 | preempt_disable(); |
| 3259 | |
| 3260 | kvm_x86_ops->prepare_guest_switch(vcpu); |
| 3261 | kvm_load_guest_fpu(vcpu); |
| 3262 | |
| 3263 | local_irq_disable(); |
| 3264 | |
Marcelo Tosatti | 32f8840 | 2009-05-07 17:55:12 -0300 | [diff] [blame] | 3265 | clear_bit(KVM_REQ_KICK, &vcpu->requests); |
| 3266 | smp_mb__after_clear_bit(); |
| 3267 | |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3268 | if (vcpu->requests || need_resched() || signal_pending(current)) { |
Avi Kivity | 6c14280 | 2008-01-15 18:27:32 +0200 | [diff] [blame] | 3269 | local_irq_enable(); |
| 3270 | preempt_enable(); |
| 3271 | r = 1; |
| 3272 | goto out; |
| 3273 | } |
| 3274 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3275 | if (vcpu->arch.exception.pending) |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 3276 | __queue_exception(vcpu); |
Avi Kivity | eb9774f | 2007-11-25 17:45:31 +0200 | [diff] [blame] | 3277 | else |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3278 | inject_pending_irq(vcpu, kvm_run); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3279 | |
Gleb Natapov | 6a8b1d1 | 2009-05-11 13:35:51 +0300 | [diff] [blame] | 3280 | /* enable NMI/IRQ window open exits if needed */ |
| 3281 | if (vcpu->arch.nmi_pending) |
| 3282 | kvm_x86_ops->enable_nmi_window(vcpu); |
| 3283 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) |
| 3284 | kvm_x86_ops->enable_irq_window(vcpu); |
| 3285 | |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3286 | if (kvm_lapic_enabled(vcpu)) { |
Gleb Natapov | 8db3baa | 2009-05-11 13:35:54 +0300 | [diff] [blame] | 3287 | update_cr8_intercept(vcpu); |
| 3288 | kvm_lapic_sync_to_vapic(vcpu); |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3289 | } |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3290 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 3291 | up_read(&vcpu->kvm->slots_lock); |
| 3292 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3293 | kvm_guest_enter(); |
| 3294 | |
Jan Kiszka | 42dbaa5 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 3295 | get_debugreg(vcpu->arch.host_dr6, 6); |
| 3296 | get_debugreg(vcpu->arch.host_dr7, 7); |
| 3297 | if (unlikely(vcpu->arch.switch_db_regs)) { |
| 3298 | get_debugreg(vcpu->arch.host_db[0], 0); |
| 3299 | get_debugreg(vcpu->arch.host_db[1], 1); |
| 3300 | get_debugreg(vcpu->arch.host_db[2], 2); |
| 3301 | get_debugreg(vcpu->arch.host_db[3], 3); |
| 3302 | |
| 3303 | set_debugreg(0, 7); |
| 3304 | set_debugreg(vcpu->arch.eff_db[0], 0); |
| 3305 | set_debugreg(vcpu->arch.eff_db[1], 1); |
| 3306 | set_debugreg(vcpu->arch.eff_db[2], 2); |
| 3307 | set_debugreg(vcpu->arch.eff_db[3], 3); |
| 3308 | } |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3309 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 3310 | KVMTRACE_0D(VMENTRY, vcpu, entryexit); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3311 | kvm_x86_ops->run(vcpu, kvm_run); |
| 3312 | |
Jan Kiszka | 42dbaa5 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 3313 | if (unlikely(vcpu->arch.switch_db_regs)) { |
| 3314 | set_debugreg(0, 7); |
| 3315 | set_debugreg(vcpu->arch.host_db[0], 0); |
| 3316 | set_debugreg(vcpu->arch.host_db[1], 1); |
| 3317 | set_debugreg(vcpu->arch.host_db[2], 2); |
| 3318 | set_debugreg(vcpu->arch.host_db[3], 3); |
| 3319 | } |
| 3320 | set_debugreg(vcpu->arch.host_dr6, 6); |
| 3321 | set_debugreg(vcpu->arch.host_dr7, 7); |
| 3322 | |
Marcelo Tosatti | 32f8840 | 2009-05-07 17:55:12 -0300 | [diff] [blame] | 3323 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3324 | local_irq_enable(); |
| 3325 | |
| 3326 | ++vcpu->stat.exits; |
| 3327 | |
| 3328 | /* |
| 3329 | * We must have an instruction between local_irq_enable() and |
| 3330 | * kvm_guest_exit(), so the timer interrupt isn't delayed by |
| 3331 | * the interrupt shadow. The stat.exits increment will do nicely. |
| 3332 | * But we need to prevent reordering, hence this barrier(): |
| 3333 | */ |
| 3334 | barrier(); |
| 3335 | |
| 3336 | kvm_guest_exit(); |
| 3337 | |
| 3338 | preempt_enable(); |
| 3339 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 3340 | down_read(&vcpu->kvm->slots_lock); |
| 3341 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3342 | /* |
| 3343 | * Profile KVM exit RIPs: |
| 3344 | */ |
| 3345 | if (unlikely(prof_on == KVM_PROFILING)) { |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3346 | unsigned long rip = kvm_rip_read(vcpu); |
| 3347 | profile_hit(KVM_PROFILING, (void *)rip); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3348 | } |
| 3349 | |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 3350 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3351 | kvm_lapic_sync_from_vapic(vcpu); |
| 3352 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3353 | r = kvm_x86_ops->handle_exit(kvm_run, vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3354 | out: |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3355 | return r; |
| 3356 | } |
| 3357 | |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 3358 | |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3359 | static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 3360 | { |
| 3361 | int r; |
| 3362 | |
| 3363 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { |
Jan Kiszka | 1b10bf3 | 2008-09-30 10:41:06 +0200 | [diff] [blame] | 3364 | pr_debug("vcpu %d received sipi with vector # %x\n", |
| 3365 | vcpu->vcpu_id, vcpu->arch.sipi_vector); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3366 | kvm_lapic_reset(vcpu); |
Gleb Natapov | 5f17928 | 2008-10-07 15:42:33 +0200 | [diff] [blame] | 3367 | r = kvm_arch_vcpu_reset(vcpu); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3368 | if (r) |
| 3369 | return r; |
| 3370 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3371 | } |
| 3372 | |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3373 | down_read(&vcpu->kvm->slots_lock); |
| 3374 | vapic_enter(vcpu); |
| 3375 | |
| 3376 | r = 1; |
| 3377 | while (r > 0) { |
Gleb Natapov | af2152f | 2008-09-22 14:28:53 +0300 | [diff] [blame] | 3378 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3379 | r = vcpu_enter_guest(vcpu, kvm_run); |
| 3380 | else { |
| 3381 | up_read(&vcpu->kvm->slots_lock); |
| 3382 | kvm_vcpu_block(vcpu); |
| 3383 | down_read(&vcpu->kvm->slots_lock); |
| 3384 | if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests)) |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 3385 | { |
| 3386 | switch(vcpu->arch.mp_state) { |
| 3387 | case KVM_MP_STATE_HALTED: |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3388 | vcpu->arch.mp_state = |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 3389 | KVM_MP_STATE_RUNNABLE; |
| 3390 | case KVM_MP_STATE_RUNNABLE: |
| 3391 | break; |
| 3392 | case KVM_MP_STATE_SIPI_RECEIVED: |
| 3393 | default: |
| 3394 | r = -EINTR; |
| 3395 | break; |
| 3396 | } |
| 3397 | } |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3398 | } |
| 3399 | |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 3400 | if (r <= 0) |
| 3401 | break; |
| 3402 | |
| 3403 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); |
| 3404 | if (kvm_cpu_has_pending_timer(vcpu)) |
| 3405 | kvm_inject_pending_timer_irqs(vcpu); |
| 3406 | |
| 3407 | if (dm_request_for_irq_injection(vcpu, kvm_run)) { |
| 3408 | r = -EINTR; |
| 3409 | kvm_run->exit_reason = KVM_EXIT_INTR; |
| 3410 | ++vcpu->stat.request_irq_exits; |
| 3411 | } |
| 3412 | if (signal_pending(current)) { |
| 3413 | r = -EINTR; |
| 3414 | kvm_run->exit_reason = KVM_EXIT_INTR; |
| 3415 | ++vcpu->stat.signal_exits; |
| 3416 | } |
| 3417 | if (need_resched()) { |
| 3418 | up_read(&vcpu->kvm->slots_lock); |
| 3419 | kvm_resched(vcpu); |
| 3420 | down_read(&vcpu->kvm->slots_lock); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3421 | } |
| 3422 | } |
| 3423 | |
| 3424 | up_read(&vcpu->kvm->slots_lock); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3425 | post_kvm_run_save(vcpu, kvm_run); |
| 3426 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3427 | vapic_exit(vcpu); |
| 3428 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3429 | return r; |
| 3430 | } |
| 3431 | |
| 3432 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 3433 | { |
| 3434 | int r; |
| 3435 | sigset_t sigsaved; |
| 3436 | |
| 3437 | vcpu_load(vcpu); |
| 3438 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3439 | if (vcpu->sigset_active) |
| 3440 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); |
| 3441 | |
Avi Kivity | ac9f6dc | 2008-07-06 15:48:31 +0300 | [diff] [blame] | 3442 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
| 3443 | kvm_vcpu_block(vcpu); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3444 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
Avi Kivity | ac9f6dc | 2008-07-06 15:48:31 +0300 | [diff] [blame] | 3445 | r = -EAGAIN; |
| 3446 | goto out; |
| 3447 | } |
| 3448 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3449 | /* re-sync apic's tpr */ |
| 3450 | if (!irqchip_in_kernel(vcpu->kvm)) |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3451 | kvm_set_cr8(vcpu, kvm_run->cr8); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3452 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3453 | if (vcpu->arch.pio.cur_count) { |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3454 | r = complete_pio(vcpu); |
| 3455 | if (r) |
| 3456 | goto out; |
| 3457 | } |
| 3458 | #if CONFIG_HAS_IOMEM |
| 3459 | if (vcpu->mmio_needed) { |
| 3460 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); |
| 3461 | vcpu->mmio_read_completed = 1; |
| 3462 | vcpu->mmio_needed = 0; |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 3463 | |
| 3464 | down_read(&vcpu->kvm->slots_lock); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3465 | r = emulate_instruction(vcpu, kvm_run, |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 3466 | vcpu->arch.mmio_fault_cr2, 0, |
| 3467 | EMULTYPE_NO_DECODE); |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 3468 | up_read(&vcpu->kvm->slots_lock); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3469 | if (r == EMULATE_DO_MMIO) { |
| 3470 | /* |
| 3471 | * Read-modify-write. Back to userspace. |
| 3472 | */ |
| 3473 | r = 0; |
| 3474 | goto out; |
| 3475 | } |
| 3476 | } |
| 3477 | #endif |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3478 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
| 3479 | kvm_register_write(vcpu, VCPU_REGS_RAX, |
| 3480 | kvm_run->hypercall.ret); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3481 | |
| 3482 | r = __vcpu_run(vcpu, kvm_run); |
| 3483 | |
| 3484 | out: |
| 3485 | if (vcpu->sigset_active) |
| 3486 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 3487 | |
| 3488 | vcpu_put(vcpu); |
| 3489 | return r; |
| 3490 | } |
| 3491 | |
| 3492 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 3493 | { |
| 3494 | vcpu_load(vcpu); |
| 3495 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3496 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 3497 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); |
| 3498 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 3499 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); |
| 3500 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); |
| 3501 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); |
| 3502 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); |
| 3503 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3504 | #ifdef CONFIG_X86_64 |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3505 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
| 3506 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); |
| 3507 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); |
| 3508 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); |
| 3509 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); |
| 3510 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); |
| 3511 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); |
| 3512 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3513 | #endif |
| 3514 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3515 | regs->rip = kvm_rip_read(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3516 | regs->rflags = kvm_x86_ops->get_rflags(vcpu); |
| 3517 | |
| 3518 | /* |
| 3519 | * Don't leak debug flags in case they were set for guest debugging |
| 3520 | */ |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 3521 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3522 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); |
| 3523 | |
| 3524 | vcpu_put(vcpu); |
| 3525 | |
| 3526 | return 0; |
| 3527 | } |
| 3528 | |
| 3529 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 3530 | { |
| 3531 | vcpu_load(vcpu); |
| 3532 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3533 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
| 3534 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); |
| 3535 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); |
| 3536 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); |
| 3537 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); |
| 3538 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); |
| 3539 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); |
| 3540 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3541 | #ifdef CONFIG_X86_64 |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3542 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
| 3543 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); |
| 3544 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); |
| 3545 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); |
| 3546 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); |
| 3547 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); |
| 3548 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); |
| 3549 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); |
| 3550 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3551 | #endif |
| 3552 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3553 | kvm_rip_write(vcpu, regs->rip); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3554 | kvm_x86_ops->set_rflags(vcpu, regs->rflags); |
| 3555 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3556 | |
Jan Kiszka | b4f14ab | 2008-04-30 17:59:04 +0200 | [diff] [blame] | 3557 | vcpu->arch.exception.pending = false; |
| 3558 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3559 | vcpu_put(vcpu); |
| 3560 | |
| 3561 | return 0; |
| 3562 | } |
| 3563 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3564 | void kvm_get_segment(struct kvm_vcpu *vcpu, |
| 3565 | struct kvm_segment *var, int seg) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3566 | { |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 3567 | kvm_x86_ops->get_segment(vcpu, var, seg); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3568 | } |
| 3569 | |
| 3570 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
| 3571 | { |
| 3572 | struct kvm_segment cs; |
| 3573 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3574 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3575 | *db = cs.db; |
| 3576 | *l = cs.l; |
| 3577 | } |
| 3578 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); |
| 3579 | |
| 3580 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| 3581 | struct kvm_sregs *sregs) |
| 3582 | { |
| 3583 | struct descriptor_table dt; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3584 | |
| 3585 | vcpu_load(vcpu); |
| 3586 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3587 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
| 3588 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); |
| 3589 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); |
| 3590 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); |
| 3591 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); |
| 3592 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3593 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3594 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
| 3595 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3596 | |
| 3597 | kvm_x86_ops->get_idt(vcpu, &dt); |
| 3598 | sregs->idt.limit = dt.limit; |
| 3599 | sregs->idt.base = dt.base; |
| 3600 | kvm_x86_ops->get_gdt(vcpu, &dt); |
| 3601 | sregs->gdt.limit = dt.limit; |
| 3602 | sregs->gdt.base = dt.base; |
| 3603 | |
| 3604 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3605 | sregs->cr0 = vcpu->arch.cr0; |
| 3606 | sregs->cr2 = vcpu->arch.cr2; |
| 3607 | sregs->cr3 = vcpu->arch.cr3; |
| 3608 | sregs->cr4 = vcpu->arch.cr4; |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3609 | sregs->cr8 = kvm_get_cr8(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3610 | sregs->efer = vcpu->arch.shadow_efer; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3611 | sregs->apic_base = kvm_get_apic_base(vcpu); |
| 3612 | |
Gleb Natapov | 923c61b | 2009-05-11 13:35:48 +0300 | [diff] [blame] | 3613 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3614 | |
Gleb Natapov | 36752c9 | 2009-05-11 13:35:53 +0300 | [diff] [blame] | 3615 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
Gleb Natapov | 14d0bc1 | 2009-04-21 17:45:11 +0300 | [diff] [blame] | 3616 | set_bit(vcpu->arch.interrupt.nr, |
| 3617 | (unsigned long *)sregs->interrupt_bitmap); |
Gleb Natapov | 16d7a19 | 2009-04-21 17:45:10 +0300 | [diff] [blame] | 3618 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3619 | vcpu_put(vcpu); |
| 3620 | |
| 3621 | return 0; |
| 3622 | } |
| 3623 | |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 3624 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
| 3625 | struct kvm_mp_state *mp_state) |
| 3626 | { |
| 3627 | vcpu_load(vcpu); |
| 3628 | mp_state->mp_state = vcpu->arch.mp_state; |
| 3629 | vcpu_put(vcpu); |
| 3630 | return 0; |
| 3631 | } |
| 3632 | |
| 3633 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
| 3634 | struct kvm_mp_state *mp_state) |
| 3635 | { |
| 3636 | vcpu_load(vcpu); |
| 3637 | vcpu->arch.mp_state = mp_state->mp_state; |
| 3638 | vcpu_put(vcpu); |
| 3639 | return 0; |
| 3640 | } |
| 3641 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3642 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3643 | struct kvm_segment *var, int seg) |
| 3644 | { |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 3645 | kvm_x86_ops->set_segment(vcpu, var, seg); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3646 | } |
| 3647 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3648 | static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector, |
| 3649 | struct kvm_segment *kvm_desct) |
| 3650 | { |
| 3651 | kvm_desct->base = seg_desc->base0; |
| 3652 | kvm_desct->base |= seg_desc->base1 << 16; |
| 3653 | kvm_desct->base |= seg_desc->base2 << 24; |
| 3654 | kvm_desct->limit = seg_desc->limit0; |
| 3655 | kvm_desct->limit |= seg_desc->limit << 16; |
Marcelo Tosatti | c93cd3a | 2008-07-19 19:08:07 -0300 | [diff] [blame] | 3656 | if (seg_desc->g) { |
| 3657 | kvm_desct->limit <<= 12; |
| 3658 | kvm_desct->limit |= 0xfff; |
| 3659 | } |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3660 | kvm_desct->selector = selector; |
| 3661 | kvm_desct->type = seg_desc->type; |
| 3662 | kvm_desct->present = seg_desc->p; |
| 3663 | kvm_desct->dpl = seg_desc->dpl; |
| 3664 | kvm_desct->db = seg_desc->d; |
| 3665 | kvm_desct->s = seg_desc->s; |
| 3666 | kvm_desct->l = seg_desc->l; |
| 3667 | kvm_desct->g = seg_desc->g; |
| 3668 | kvm_desct->avl = seg_desc->avl; |
| 3669 | if (!selector) |
| 3670 | kvm_desct->unusable = 1; |
| 3671 | else |
| 3672 | kvm_desct->unusable = 0; |
| 3673 | kvm_desct->padding = 0; |
| 3674 | } |
| 3675 | |
Amit Shah | b8222ad | 2008-10-22 16:39:47 +0530 | [diff] [blame] | 3676 | static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu, |
| 3677 | u16 selector, |
| 3678 | struct descriptor_table *dtable) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3679 | { |
| 3680 | if (selector & 1 << 2) { |
| 3681 | struct kvm_segment kvm_seg; |
| 3682 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3683 | kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3684 | |
| 3685 | if (kvm_seg.unusable) |
| 3686 | dtable->limit = 0; |
| 3687 | else |
| 3688 | dtable->limit = kvm_seg.limit; |
| 3689 | dtable->base = kvm_seg.base; |
| 3690 | } |
| 3691 | else |
| 3692 | kvm_x86_ops->get_gdt(vcpu, dtable); |
| 3693 | } |
| 3694 | |
| 3695 | /* allowed just for 8 bytes segments */ |
| 3696 | static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
| 3697 | struct desc_struct *seg_desc) |
| 3698 | { |
Marcelo Tosatti | 98899aa | 2008-07-16 19:07:10 -0300 | [diff] [blame] | 3699 | gpa_t gpa; |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3700 | struct descriptor_table dtable; |
| 3701 | u16 index = selector >> 3; |
| 3702 | |
Amit Shah | b8222ad | 2008-10-22 16:39:47 +0530 | [diff] [blame] | 3703 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3704 | |
| 3705 | if (dtable.limit < index * 8 + 7) { |
| 3706 | kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc); |
| 3707 | return 1; |
| 3708 | } |
Marcelo Tosatti | 98899aa | 2008-07-16 19:07:10 -0300 | [diff] [blame] | 3709 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
| 3710 | gpa += index * 8; |
| 3711 | return kvm_read_guest(vcpu->kvm, gpa, seg_desc, 8); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3712 | } |
| 3713 | |
| 3714 | /* allowed just for 8 bytes segments */ |
| 3715 | static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
| 3716 | struct desc_struct *seg_desc) |
| 3717 | { |
Marcelo Tosatti | 98899aa | 2008-07-16 19:07:10 -0300 | [diff] [blame] | 3718 | gpa_t gpa; |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3719 | struct descriptor_table dtable; |
| 3720 | u16 index = selector >> 3; |
| 3721 | |
Amit Shah | b8222ad | 2008-10-22 16:39:47 +0530 | [diff] [blame] | 3722 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3723 | |
| 3724 | if (dtable.limit < index * 8 + 7) |
| 3725 | return 1; |
Marcelo Tosatti | 98899aa | 2008-07-16 19:07:10 -0300 | [diff] [blame] | 3726 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
| 3727 | gpa += index * 8; |
| 3728 | return kvm_write_guest(vcpu->kvm, gpa, seg_desc, 8); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3729 | } |
| 3730 | |
| 3731 | static u32 get_tss_base_addr(struct kvm_vcpu *vcpu, |
| 3732 | struct desc_struct *seg_desc) |
| 3733 | { |
| 3734 | u32 base_addr; |
| 3735 | |
| 3736 | base_addr = seg_desc->base0; |
| 3737 | base_addr |= (seg_desc->base1 << 16); |
| 3738 | base_addr |= (seg_desc->base2 << 24); |
| 3739 | |
Marcelo Tosatti | 98899aa | 2008-07-16 19:07:10 -0300 | [diff] [blame] | 3740 | return vcpu->arch.mmu.gva_to_gpa(vcpu, base_addr); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3741 | } |
| 3742 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3743 | static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg) |
| 3744 | { |
| 3745 | struct kvm_segment kvm_seg; |
| 3746 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3747 | kvm_get_segment(vcpu, &kvm_seg, seg); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3748 | return kvm_seg.selector; |
| 3749 | } |
| 3750 | |
| 3751 | static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu, |
| 3752 | u16 selector, |
| 3753 | struct kvm_segment *kvm_seg) |
| 3754 | { |
| 3755 | struct desc_struct seg_desc; |
| 3756 | |
| 3757 | if (load_guest_segment_descriptor(vcpu, selector, &seg_desc)) |
| 3758 | return 1; |
| 3759 | seg_desct_to_kvm_desct(&seg_desc, selector, kvm_seg); |
| 3760 | return 0; |
| 3761 | } |
| 3762 | |
Harvey Harrison | 2259e3a | 2008-08-22 13:29:17 -0700 | [diff] [blame] | 3763 | static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg) |
Avi Kivity | f4bbd9a | 2008-08-20 15:51:42 +0300 | [diff] [blame] | 3764 | { |
| 3765 | struct kvm_segment segvar = { |
| 3766 | .base = selector << 4, |
| 3767 | .limit = 0xffff, |
| 3768 | .selector = selector, |
| 3769 | .type = 3, |
| 3770 | .present = 1, |
| 3771 | .dpl = 3, |
| 3772 | .db = 0, |
| 3773 | .s = 1, |
| 3774 | .l = 0, |
| 3775 | .g = 0, |
| 3776 | .avl = 0, |
| 3777 | .unusable = 0, |
| 3778 | }; |
| 3779 | kvm_x86_ops->set_segment(vcpu, &segvar, seg); |
| 3780 | return 0; |
| 3781 | } |
| 3782 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3783 | int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
| 3784 | int type_bits, int seg) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3785 | { |
| 3786 | struct kvm_segment kvm_seg; |
| 3787 | |
Avi Kivity | f4bbd9a | 2008-08-20 15:51:42 +0300 | [diff] [blame] | 3788 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) |
| 3789 | return kvm_load_realmode_segment(vcpu, selector, seg); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3790 | if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg)) |
| 3791 | return 1; |
| 3792 | kvm_seg.type |= type_bits; |
| 3793 | |
| 3794 | if (seg != VCPU_SREG_SS && seg != VCPU_SREG_CS && |
| 3795 | seg != VCPU_SREG_LDTR) |
| 3796 | if (!kvm_seg.s) |
| 3797 | kvm_seg.unusable = 1; |
| 3798 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3799 | kvm_set_segment(vcpu, &kvm_seg, seg); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3800 | return 0; |
| 3801 | } |
| 3802 | |
| 3803 | static void save_state_to_tss32(struct kvm_vcpu *vcpu, |
| 3804 | struct tss_segment_32 *tss) |
| 3805 | { |
| 3806 | tss->cr3 = vcpu->arch.cr3; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3807 | tss->eip = kvm_rip_read(vcpu); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3808 | tss->eflags = kvm_x86_ops->get_rflags(vcpu); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3809 | tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 3810 | tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 3811 | tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX); |
| 3812 | tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX); |
| 3813 | tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP); |
| 3814 | tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP); |
| 3815 | tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI); |
| 3816 | tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3817 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); |
| 3818 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); |
| 3819 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); |
| 3820 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); |
| 3821 | tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS); |
| 3822 | tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS); |
| 3823 | tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3824 | } |
| 3825 | |
| 3826 | static int load_state_from_tss32(struct kvm_vcpu *vcpu, |
| 3827 | struct tss_segment_32 *tss) |
| 3828 | { |
| 3829 | kvm_set_cr3(vcpu, tss->cr3); |
| 3830 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3831 | kvm_rip_write(vcpu, tss->eip); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3832 | kvm_x86_ops->set_rflags(vcpu, tss->eflags | 2); |
| 3833 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3834 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax); |
| 3835 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx); |
| 3836 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx); |
| 3837 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx); |
| 3838 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp); |
| 3839 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp); |
| 3840 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi); |
| 3841 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3842 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3843 | if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, 0, VCPU_SREG_LDTR)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3844 | return 1; |
| 3845 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3846 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3847 | return 1; |
| 3848 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3849 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3850 | return 1; |
| 3851 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3852 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3853 | return 1; |
| 3854 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3855 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3856 | return 1; |
| 3857 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3858 | if (kvm_load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3859 | return 1; |
| 3860 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3861 | if (kvm_load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3862 | return 1; |
| 3863 | return 0; |
| 3864 | } |
| 3865 | |
| 3866 | static void save_state_to_tss16(struct kvm_vcpu *vcpu, |
| 3867 | struct tss_segment_16 *tss) |
| 3868 | { |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3869 | tss->ip = kvm_rip_read(vcpu); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3870 | tss->flag = kvm_x86_ops->get_rflags(vcpu); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3871 | tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 3872 | tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 3873 | tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX); |
| 3874 | tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX); |
| 3875 | tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP); |
| 3876 | tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP); |
| 3877 | tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI); |
| 3878 | tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3879 | |
| 3880 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); |
| 3881 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); |
| 3882 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); |
| 3883 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); |
| 3884 | tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR); |
| 3885 | tss->prev_task_link = get_segment_selector(vcpu, VCPU_SREG_TR); |
| 3886 | } |
| 3887 | |
| 3888 | static int load_state_from_tss16(struct kvm_vcpu *vcpu, |
| 3889 | struct tss_segment_16 *tss) |
| 3890 | { |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3891 | kvm_rip_write(vcpu, tss->ip); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3892 | kvm_x86_ops->set_rflags(vcpu, tss->flag | 2); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3893 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax); |
| 3894 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx); |
| 3895 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx); |
| 3896 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx); |
| 3897 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp); |
| 3898 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp); |
| 3899 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si); |
| 3900 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3901 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3902 | if (kvm_load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3903 | return 1; |
| 3904 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3905 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3906 | return 1; |
| 3907 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3908 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3909 | return 1; |
| 3910 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3911 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3912 | return 1; |
| 3913 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3914 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3915 | return 1; |
| 3916 | return 0; |
| 3917 | } |
| 3918 | |
Harvey Harrison | 8b2cf73 | 2008-04-27 12:14:13 -0700 | [diff] [blame] | 3919 | static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector, |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 3920 | u16 old_tss_sel, u32 old_tss_base, |
| 3921 | struct desc_struct *nseg_desc) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3922 | { |
| 3923 | struct tss_segment_16 tss_segment_16; |
| 3924 | int ret = 0; |
| 3925 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 3926 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
| 3927 | sizeof tss_segment_16)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3928 | goto out; |
| 3929 | |
| 3930 | save_state_to_tss16(vcpu, &tss_segment_16); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3931 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 3932 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
| 3933 | sizeof tss_segment_16)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3934 | goto out; |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 3935 | |
| 3936 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), |
| 3937 | &tss_segment_16, sizeof tss_segment_16)) |
| 3938 | goto out; |
| 3939 | |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 3940 | if (old_tss_sel != 0xffff) { |
| 3941 | tss_segment_16.prev_task_link = old_tss_sel; |
| 3942 | |
| 3943 | if (kvm_write_guest(vcpu->kvm, |
| 3944 | get_tss_base_addr(vcpu, nseg_desc), |
| 3945 | &tss_segment_16.prev_task_link, |
| 3946 | sizeof tss_segment_16.prev_task_link)) |
| 3947 | goto out; |
| 3948 | } |
| 3949 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3950 | if (load_state_from_tss16(vcpu, &tss_segment_16)) |
| 3951 | goto out; |
| 3952 | |
| 3953 | ret = 1; |
| 3954 | out: |
| 3955 | return ret; |
| 3956 | } |
| 3957 | |
Harvey Harrison | 8b2cf73 | 2008-04-27 12:14:13 -0700 | [diff] [blame] | 3958 | static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector, |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 3959 | u16 old_tss_sel, u32 old_tss_base, |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3960 | struct desc_struct *nseg_desc) |
| 3961 | { |
| 3962 | struct tss_segment_32 tss_segment_32; |
| 3963 | int ret = 0; |
| 3964 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 3965 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
| 3966 | sizeof tss_segment_32)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3967 | goto out; |
| 3968 | |
| 3969 | save_state_to_tss32(vcpu, &tss_segment_32); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3970 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 3971 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
| 3972 | sizeof tss_segment_32)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3973 | goto out; |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 3974 | |
| 3975 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), |
| 3976 | &tss_segment_32, sizeof tss_segment_32)) |
| 3977 | goto out; |
| 3978 | |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 3979 | if (old_tss_sel != 0xffff) { |
| 3980 | tss_segment_32.prev_task_link = old_tss_sel; |
| 3981 | |
| 3982 | if (kvm_write_guest(vcpu->kvm, |
| 3983 | get_tss_base_addr(vcpu, nseg_desc), |
| 3984 | &tss_segment_32.prev_task_link, |
| 3985 | sizeof tss_segment_32.prev_task_link)) |
| 3986 | goto out; |
| 3987 | } |
| 3988 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3989 | if (load_state_from_tss32(vcpu, &tss_segment_32)) |
| 3990 | goto out; |
| 3991 | |
| 3992 | ret = 1; |
| 3993 | out: |
| 3994 | return ret; |
| 3995 | } |
| 3996 | |
| 3997 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason) |
| 3998 | { |
| 3999 | struct kvm_segment tr_seg; |
| 4000 | struct desc_struct cseg_desc; |
| 4001 | struct desc_struct nseg_desc; |
| 4002 | int ret = 0; |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4003 | u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR); |
| 4004 | u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4005 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4006 | old_tss_base = vcpu->arch.mmu.gva_to_gpa(vcpu, old_tss_base); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4007 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4008 | /* FIXME: Handle errors. Failure to read either TSS or their |
| 4009 | * descriptors should generate a pagefault. |
| 4010 | */ |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4011 | if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc)) |
| 4012 | goto out; |
| 4013 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4014 | if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4015 | goto out; |
| 4016 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4017 | if (reason != TASK_SWITCH_IRET) { |
| 4018 | int cpl; |
| 4019 | |
| 4020 | cpl = kvm_x86_ops->get_cpl(vcpu); |
| 4021 | if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) { |
| 4022 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); |
| 4023 | return 1; |
| 4024 | } |
| 4025 | } |
| 4026 | |
| 4027 | if (!nseg_desc.p || (nseg_desc.limit0 | nseg_desc.limit << 16) < 0x67) { |
| 4028 | kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc); |
| 4029 | return 1; |
| 4030 | } |
| 4031 | |
| 4032 | if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) { |
Izik Eidus | 3fe913e | 2008-04-28 18:23:52 +0300 | [diff] [blame] | 4033 | cseg_desc.type &= ~(1 << 1); //clear the B flag |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4034 | save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4035 | } |
| 4036 | |
| 4037 | if (reason == TASK_SWITCH_IRET) { |
| 4038 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); |
| 4039 | kvm_x86_ops->set_rflags(vcpu, eflags & ~X86_EFLAGS_NT); |
| 4040 | } |
| 4041 | |
Gleb Natapov | 64a7ec0 | 2009-03-30 16:03:29 +0300 | [diff] [blame] | 4042 | /* set back link to prev task only if NT bit is set in eflags |
| 4043 | note that old_tss_sel is not used afetr this point */ |
| 4044 | if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE) |
| 4045 | old_tss_sel = 0xffff; |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4046 | |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 4047 | /* set back link to prev task only if NT bit is set in eflags |
| 4048 | note that old_tss_sel is not used afetr this point */ |
| 4049 | if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE) |
| 4050 | old_tss_sel = 0xffff; |
| 4051 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4052 | if (nseg_desc.type & 8) |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 4053 | ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_sel, |
| 4054 | old_tss_base, &nseg_desc); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4055 | else |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 4056 | ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_sel, |
| 4057 | old_tss_base, &nseg_desc); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4058 | |
| 4059 | if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) { |
| 4060 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); |
| 4061 | kvm_x86_ops->set_rflags(vcpu, eflags | X86_EFLAGS_NT); |
| 4062 | } |
| 4063 | |
| 4064 | if (reason != TASK_SWITCH_IRET) { |
Izik Eidus | 3fe913e | 2008-04-28 18:23:52 +0300 | [diff] [blame] | 4065 | nseg_desc.type |= (1 << 1); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4066 | save_guest_segment_descriptor(vcpu, tss_selector, |
| 4067 | &nseg_desc); |
| 4068 | } |
| 4069 | |
| 4070 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 | X86_CR0_TS); |
| 4071 | seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg); |
| 4072 | tr_seg.type = 11; |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4073 | kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4074 | out: |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4075 | return ret; |
| 4076 | } |
| 4077 | EXPORT_SYMBOL_GPL(kvm_task_switch); |
| 4078 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4079 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| 4080 | struct kvm_sregs *sregs) |
| 4081 | { |
| 4082 | int mmu_reset_needed = 0; |
Gleb Natapov | 923c61b | 2009-05-11 13:35:48 +0300 | [diff] [blame] | 4083 | int pending_vec, max_bits; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4084 | struct descriptor_table dt; |
| 4085 | |
| 4086 | vcpu_load(vcpu); |
| 4087 | |
| 4088 | dt.limit = sregs->idt.limit; |
| 4089 | dt.base = sregs->idt.base; |
| 4090 | kvm_x86_ops->set_idt(vcpu, &dt); |
| 4091 | dt.limit = sregs->gdt.limit; |
| 4092 | dt.base = sregs->gdt.base; |
| 4093 | kvm_x86_ops->set_gdt(vcpu, &dt); |
| 4094 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4095 | vcpu->arch.cr2 = sregs->cr2; |
| 4096 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; |
Marcelo Tosatti | 59839df | 2009-04-16 08:30:44 -0300 | [diff] [blame] | 4097 | |
| 4098 | down_read(&vcpu->kvm->slots_lock); |
| 4099 | if (gfn_to_memslot(vcpu->kvm, sregs->cr3 >> PAGE_SHIFT)) |
| 4100 | vcpu->arch.cr3 = sregs->cr3; |
| 4101 | else |
| 4102 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); |
| 4103 | up_read(&vcpu->kvm->slots_lock); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4104 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 4105 | kvm_set_cr8(vcpu, sregs->cr8); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4106 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4107 | mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4108 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4109 | kvm_set_apic_base(vcpu, sregs->apic_base); |
| 4110 | |
| 4111 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
| 4112 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4113 | mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4114 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
Paul Knowles | d730616 | 2008-02-06 11:02:35 +0000 | [diff] [blame] | 4115 | vcpu->arch.cr0 = sregs->cr0; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4116 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4117 | mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4118 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
| 4119 | if (!is_long_mode(vcpu) && is_pae(vcpu)) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4120 | load_pdptrs(vcpu, vcpu->arch.cr3); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4121 | |
| 4122 | if (mmu_reset_needed) |
| 4123 | kvm_mmu_reset_context(vcpu); |
| 4124 | |
Gleb Natapov | 923c61b | 2009-05-11 13:35:48 +0300 | [diff] [blame] | 4125 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
| 4126 | pending_vec = find_first_bit( |
| 4127 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); |
| 4128 | if (pending_vec < max_bits) { |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 4129 | kvm_queue_interrupt(vcpu, pending_vec, false); |
Gleb Natapov | 923c61b | 2009-05-11 13:35:48 +0300 | [diff] [blame] | 4130 | pr_debug("Set back pending irq %d\n", pending_vec); |
| 4131 | if (irqchip_in_kernel(vcpu->kvm)) |
| 4132 | kvm_pic_clear_isr_ack(vcpu->kvm); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4133 | } |
| 4134 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4135 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
| 4136 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); |
| 4137 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); |
| 4138 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); |
| 4139 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); |
| 4140 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4141 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4142 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
| 4143 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4144 | |
Marcelo Tosatti | 9c3e4aa | 2008-09-10 16:40:55 -0300 | [diff] [blame] | 4145 | /* Older userspace won't unhalt the vcpu on reset. */ |
| 4146 | if (vcpu->vcpu_id == 0 && kvm_rip_read(vcpu) == 0xfff0 && |
| 4147 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
| 4148 | !(vcpu->arch.cr0 & X86_CR0_PE)) |
| 4149 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
| 4150 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4151 | vcpu_put(vcpu); |
| 4152 | |
| 4153 | return 0; |
| 4154 | } |
| 4155 | |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 4156 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
| 4157 | struct kvm_guest_debug *dbg) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4158 | { |
Jan Kiszka | ae675ef | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 4159 | int i, r; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4160 | |
| 4161 | vcpu_load(vcpu); |
| 4162 | |
Jan Kiszka | ae675ef | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 4163 | if ((dbg->control & (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) == |
| 4164 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) { |
| 4165 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
| 4166 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; |
| 4167 | vcpu->arch.switch_db_regs = |
| 4168 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); |
| 4169 | } else { |
| 4170 | for (i = 0; i < KVM_NR_DB_REGS; i++) |
| 4171 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; |
| 4172 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); |
| 4173 | } |
| 4174 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4175 | r = kvm_x86_ops->set_guest_debug(vcpu, dbg); |
| 4176 | |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 4177 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
| 4178 | kvm_queue_exception(vcpu, DB_VECTOR); |
| 4179 | else if (dbg->control & KVM_GUESTDBG_INJECT_BP) |
| 4180 | kvm_queue_exception(vcpu, BP_VECTOR); |
| 4181 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4182 | vcpu_put(vcpu); |
| 4183 | |
| 4184 | return r; |
| 4185 | } |
| 4186 | |
| 4187 | /* |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4188 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when |
| 4189 | * we have asm/x86/processor.h |
| 4190 | */ |
| 4191 | struct fxsave { |
| 4192 | u16 cwd; |
| 4193 | u16 swd; |
| 4194 | u16 twd; |
| 4195 | u16 fop; |
| 4196 | u64 rip; |
| 4197 | u64 rdp; |
| 4198 | u32 mxcsr; |
| 4199 | u32 mxcsr_mask; |
| 4200 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ |
| 4201 | #ifdef CONFIG_X86_64 |
| 4202 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ |
| 4203 | #else |
| 4204 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ |
| 4205 | #endif |
| 4206 | }; |
| 4207 | |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 4208 | /* |
| 4209 | * Translate a guest virtual address to a guest physical address. |
| 4210 | */ |
| 4211 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
| 4212 | struct kvm_translation *tr) |
| 4213 | { |
| 4214 | unsigned long vaddr = tr->linear_address; |
| 4215 | gpa_t gpa; |
| 4216 | |
| 4217 | vcpu_load(vcpu); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4218 | down_read(&vcpu->kvm->slots_lock); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4219 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4220 | up_read(&vcpu->kvm->slots_lock); |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 4221 | tr->physical_address = gpa; |
| 4222 | tr->valid = gpa != UNMAPPED_GVA; |
| 4223 | tr->writeable = 1; |
| 4224 | tr->usermode = 0; |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 4225 | vcpu_put(vcpu); |
| 4226 | |
| 4227 | return 0; |
| 4228 | } |
| 4229 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4230 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 4231 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4232 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4233 | |
| 4234 | vcpu_load(vcpu); |
| 4235 | |
| 4236 | memcpy(fpu->fpr, fxsave->st_space, 128); |
| 4237 | fpu->fcw = fxsave->cwd; |
| 4238 | fpu->fsw = fxsave->swd; |
| 4239 | fpu->ftwx = fxsave->twd; |
| 4240 | fpu->last_opcode = fxsave->fop; |
| 4241 | fpu->last_ip = fxsave->rip; |
| 4242 | fpu->last_dp = fxsave->rdp; |
| 4243 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); |
| 4244 | |
| 4245 | vcpu_put(vcpu); |
| 4246 | |
| 4247 | return 0; |
| 4248 | } |
| 4249 | |
| 4250 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 4251 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4252 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4253 | |
| 4254 | vcpu_load(vcpu); |
| 4255 | |
| 4256 | memcpy(fxsave->st_space, fpu->fpr, 128); |
| 4257 | fxsave->cwd = fpu->fcw; |
| 4258 | fxsave->swd = fpu->fsw; |
| 4259 | fxsave->twd = fpu->ftwx; |
| 4260 | fxsave->fop = fpu->last_opcode; |
| 4261 | fxsave->rip = fpu->last_ip; |
| 4262 | fxsave->rdp = fpu->last_dp; |
| 4263 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); |
| 4264 | |
| 4265 | vcpu_put(vcpu); |
| 4266 | |
| 4267 | return 0; |
| 4268 | } |
| 4269 | |
| 4270 | void fx_init(struct kvm_vcpu *vcpu) |
| 4271 | { |
| 4272 | unsigned after_mxcsr_mask; |
| 4273 | |
Andrea Arcangeli | bc1a34f | 2008-05-01 18:43:33 +0200 | [diff] [blame] | 4274 | /* |
| 4275 | * Touch the fpu the first time in non atomic context as if |
| 4276 | * this is the first fpu instruction the exception handler |
| 4277 | * will fire before the instruction returns and it'll have to |
| 4278 | * allocate ram with GFP_KERNEL. |
| 4279 | */ |
| 4280 | if (!used_math()) |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 4281 | kvm_fx_save(&vcpu->arch.host_fx_image); |
Andrea Arcangeli | bc1a34f | 2008-05-01 18:43:33 +0200 | [diff] [blame] | 4282 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4283 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
| 4284 | preempt_disable(); |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 4285 | kvm_fx_save(&vcpu->arch.host_fx_image); |
| 4286 | kvm_fx_finit(); |
| 4287 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
| 4288 | kvm_fx_restore(&vcpu->arch.host_fx_image); |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4289 | preempt_enable(); |
| 4290 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4291 | vcpu->arch.cr0 |= X86_CR0_ET; |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4292 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4293 | vcpu->arch.guest_fx_image.mxcsr = 0x1f80; |
| 4294 | memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask, |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4295 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); |
| 4296 | } |
| 4297 | EXPORT_SYMBOL_GPL(fx_init); |
| 4298 | |
| 4299 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
| 4300 | { |
| 4301 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) |
| 4302 | return; |
| 4303 | |
| 4304 | vcpu->guest_fpu_loaded = 1; |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 4305 | kvm_fx_save(&vcpu->arch.host_fx_image); |
| 4306 | kvm_fx_restore(&vcpu->arch.guest_fx_image); |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4307 | } |
| 4308 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); |
| 4309 | |
| 4310 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) |
| 4311 | { |
| 4312 | if (!vcpu->guest_fpu_loaded) |
| 4313 | return; |
| 4314 | |
| 4315 | vcpu->guest_fpu_loaded = 0; |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 4316 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
| 4317 | kvm_fx_restore(&vcpu->arch.host_fx_image); |
Avi Kivity | f096ed8 | 2007-11-18 13:54:33 +0200 | [diff] [blame] | 4318 | ++vcpu->stat.fpu_reload; |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4319 | } |
| 4320 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4321 | |
| 4322 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) |
| 4323 | { |
Joerg Roedel | 7f1ea20 | 2009-02-25 16:08:31 +0100 | [diff] [blame] | 4324 | if (vcpu->arch.time_page) { |
| 4325 | kvm_release_page_dirty(vcpu->arch.time_page); |
| 4326 | vcpu->arch.time_page = NULL; |
| 4327 | } |
| 4328 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4329 | kvm_x86_ops->vcpu_free(vcpu); |
| 4330 | } |
| 4331 | |
| 4332 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, |
| 4333 | unsigned int id) |
| 4334 | { |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 4335 | return kvm_x86_ops->vcpu_create(kvm, id); |
| 4336 | } |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4337 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 4338 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
| 4339 | { |
| 4340 | int r; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4341 | |
| 4342 | /* We do fxsave: this must be aligned. */ |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4343 | BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4344 | |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 4345 | vcpu->arch.mtrr_state.have_fixed = 1; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4346 | vcpu_load(vcpu); |
| 4347 | r = kvm_arch_vcpu_reset(vcpu); |
| 4348 | if (r == 0) |
| 4349 | r = kvm_mmu_setup(vcpu); |
| 4350 | vcpu_put(vcpu); |
| 4351 | if (r < 0) |
| 4352 | goto free_vcpu; |
| 4353 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 4354 | return 0; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4355 | free_vcpu: |
| 4356 | kvm_x86_ops->vcpu_free(vcpu); |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 4357 | return r; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4358 | } |
| 4359 | |
Hollis Blanchard | d40ccc6 | 2007-11-19 14:04:43 -0600 | [diff] [blame] | 4360 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4361 | { |
| 4362 | vcpu_load(vcpu); |
| 4363 | kvm_mmu_unload(vcpu); |
| 4364 | vcpu_put(vcpu); |
| 4365 | |
| 4366 | kvm_x86_ops->vcpu_free(vcpu); |
| 4367 | } |
| 4368 | |
| 4369 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) |
| 4370 | { |
Jan Kiszka | 448fa4a | 2008-09-26 09:30:48 +0200 | [diff] [blame] | 4371 | vcpu->arch.nmi_pending = false; |
| 4372 | vcpu->arch.nmi_injected = false; |
| 4373 | |
Jan Kiszka | 42dbaa5 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 4374 | vcpu->arch.switch_db_regs = 0; |
| 4375 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
| 4376 | vcpu->arch.dr6 = DR6_FIXED_1; |
| 4377 | vcpu->arch.dr7 = DR7_FIXED_1; |
| 4378 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4379 | return kvm_x86_ops->vcpu_reset(vcpu); |
| 4380 | } |
| 4381 | |
| 4382 | void kvm_arch_hardware_enable(void *garbage) |
| 4383 | { |
| 4384 | kvm_x86_ops->hardware_enable(garbage); |
| 4385 | } |
| 4386 | |
| 4387 | void kvm_arch_hardware_disable(void *garbage) |
| 4388 | { |
| 4389 | kvm_x86_ops->hardware_disable(garbage); |
| 4390 | } |
| 4391 | |
| 4392 | int kvm_arch_hardware_setup(void) |
| 4393 | { |
| 4394 | return kvm_x86_ops->hardware_setup(); |
| 4395 | } |
| 4396 | |
| 4397 | void kvm_arch_hardware_unsetup(void) |
| 4398 | { |
| 4399 | kvm_x86_ops->hardware_unsetup(); |
| 4400 | } |
| 4401 | |
| 4402 | void kvm_arch_check_processor_compat(void *rtn) |
| 4403 | { |
| 4404 | kvm_x86_ops->check_processor_compatibility(rtn); |
| 4405 | } |
| 4406 | |
| 4407 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
| 4408 | { |
| 4409 | struct page *page; |
| 4410 | struct kvm *kvm; |
| 4411 | int r; |
| 4412 | |
| 4413 | BUG_ON(vcpu->kvm == NULL); |
| 4414 | kvm = vcpu->kvm; |
| 4415 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4416 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4417 | if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0) |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 4418 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4419 | else |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 4420 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4421 | |
| 4422 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 4423 | if (!page) { |
| 4424 | r = -ENOMEM; |
| 4425 | goto fail; |
| 4426 | } |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4427 | vcpu->arch.pio_data = page_address(page); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4428 | |
| 4429 | r = kvm_mmu_create(vcpu); |
| 4430 | if (r < 0) |
| 4431 | goto fail_free_pio_data; |
| 4432 | |
| 4433 | if (irqchip_in_kernel(kvm)) { |
| 4434 | r = kvm_create_lapic(vcpu); |
| 4435 | if (r < 0) |
| 4436 | goto fail_mmu_destroy; |
| 4437 | } |
| 4438 | |
| 4439 | return 0; |
| 4440 | |
| 4441 | fail_mmu_destroy: |
| 4442 | kvm_mmu_destroy(vcpu); |
| 4443 | fail_free_pio_data: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4444 | free_page((unsigned long)vcpu->arch.pio_data); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4445 | fail: |
| 4446 | return r; |
| 4447 | } |
| 4448 | |
| 4449 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 4450 | { |
| 4451 | kvm_free_lapic(vcpu); |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 4452 | down_read(&vcpu->kvm->slots_lock); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4453 | kvm_mmu_destroy(vcpu); |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 4454 | up_read(&vcpu->kvm->slots_lock); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4455 | free_page((unsigned long)vcpu->arch.pio_data); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4456 | } |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4457 | |
| 4458 | struct kvm *kvm_arch_create_vm(void) |
| 4459 | { |
| 4460 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); |
| 4461 | |
| 4462 | if (!kvm) |
| 4463 | return ERR_PTR(-ENOMEM); |
| 4464 | |
Zhang Xiantao | f05e70a | 2007-12-14 10:01:48 +0800 | [diff] [blame] | 4465 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
Ben-Ami Yassour | 4d5c5d0 | 2008-07-28 19:26:26 +0300 | [diff] [blame] | 4466 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4467 | |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 4468 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
| 4469 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); |
| 4470 | |
Marcelo Tosatti | 53f658b3 | 2008-12-11 20:45:05 +0100 | [diff] [blame] | 4471 | rdtscll(kvm->arch.vm_init_tsc); |
| 4472 | |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4473 | return kvm; |
| 4474 | } |
| 4475 | |
| 4476 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) |
| 4477 | { |
| 4478 | vcpu_load(vcpu); |
| 4479 | kvm_mmu_unload(vcpu); |
| 4480 | vcpu_put(vcpu); |
| 4481 | } |
| 4482 | |
| 4483 | static void kvm_free_vcpus(struct kvm *kvm) |
| 4484 | { |
| 4485 | unsigned int i; |
| 4486 | |
| 4487 | /* |
| 4488 | * Unpin any mmu pages first. |
| 4489 | */ |
| 4490 | for (i = 0; i < KVM_MAX_VCPUS; ++i) |
| 4491 | if (kvm->vcpus[i]) |
| 4492 | kvm_unload_vcpu_mmu(kvm->vcpus[i]); |
| 4493 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| 4494 | if (kvm->vcpus[i]) { |
| 4495 | kvm_arch_vcpu_free(kvm->vcpus[i]); |
| 4496 | kvm->vcpus[i] = NULL; |
| 4497 | } |
| 4498 | } |
| 4499 | |
| 4500 | } |
| 4501 | |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 4502 | void kvm_arch_sync_events(struct kvm *kvm) |
| 4503 | { |
Sheng Yang | ba4cef3 | 2009-01-06 10:03:03 +0800 | [diff] [blame] | 4504 | kvm_free_all_assigned_devices(kvm); |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 4505 | } |
| 4506 | |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4507 | void kvm_arch_destroy_vm(struct kvm *kvm) |
| 4508 | { |
Sheng Yang | 6eb5581 | 2008-10-31 12:37:41 +0800 | [diff] [blame] | 4509 | kvm_iommu_unmap_guest(kvm); |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 4510 | kvm_free_pit(kvm); |
Zhang Xiantao | d7deeeb0 | 2007-12-14 10:17:34 +0800 | [diff] [blame] | 4511 | kfree(kvm->arch.vpic); |
| 4512 | kfree(kvm->arch.vioapic); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4513 | kvm_free_vcpus(kvm); |
| 4514 | kvm_free_physmem(kvm); |
Avi Kivity | 3d45830 | 2008-03-25 11:26:13 +0200 | [diff] [blame] | 4515 | if (kvm->arch.apic_access_page) |
| 4516 | put_page(kvm->arch.apic_access_page); |
Sheng Yang | b7ebfb0 | 2008-04-25 21:44:52 +0800 | [diff] [blame] | 4517 | if (kvm->arch.ept_identity_pagetable) |
| 4518 | put_page(kvm->arch.ept_identity_pagetable); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4519 | kfree(kvm); |
| 4520 | } |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4521 | |
| 4522 | int kvm_arch_set_memory_region(struct kvm *kvm, |
| 4523 | struct kvm_userspace_memory_region *mem, |
| 4524 | struct kvm_memory_slot old, |
| 4525 | int user_alloc) |
| 4526 | { |
| 4527 | int npages = mem->memory_size >> PAGE_SHIFT; |
| 4528 | struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot]; |
| 4529 | |
| 4530 | /*To keep backward compatibility with older userspace, |
| 4531 | *x86 needs to hanlde !user_alloc case. |
| 4532 | */ |
| 4533 | if (!user_alloc) { |
| 4534 | if (npages && !old.rmap) { |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 4535 | unsigned long userspace_addr; |
| 4536 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4537 | down_write(¤t->mm->mmap_sem); |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 4538 | userspace_addr = do_mmap(NULL, 0, |
| 4539 | npages * PAGE_SIZE, |
| 4540 | PROT_READ | PROT_WRITE, |
Avi Kivity | acee3c0 | 2008-08-26 17:22:47 +0300 | [diff] [blame] | 4541 | MAP_PRIVATE | MAP_ANONYMOUS, |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 4542 | 0); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4543 | up_write(¤t->mm->mmap_sem); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4544 | |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 4545 | if (IS_ERR((void *)userspace_addr)) |
| 4546 | return PTR_ERR((void *)userspace_addr); |
| 4547 | |
| 4548 | /* set userspace_addr atomically for kvm_hva_to_rmapp */ |
| 4549 | spin_lock(&kvm->mmu_lock); |
| 4550 | memslot->userspace_addr = userspace_addr; |
| 4551 | spin_unlock(&kvm->mmu_lock); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4552 | } else { |
| 4553 | if (!old.user_alloc && old.rmap) { |
| 4554 | int ret; |
| 4555 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4556 | down_write(¤t->mm->mmap_sem); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4557 | ret = do_munmap(current->mm, old.userspace_addr, |
| 4558 | old.npages * PAGE_SIZE); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4559 | up_write(¤t->mm->mmap_sem); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4560 | if (ret < 0) |
| 4561 | printk(KERN_WARNING |
| 4562 | "kvm_vm_ioctl_set_memory_region: " |
| 4563 | "failed to munmap memory\n"); |
| 4564 | } |
| 4565 | } |
| 4566 | } |
| 4567 | |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 4568 | spin_lock(&kvm->mmu_lock); |
Zhang Xiantao | f05e70a | 2007-12-14 10:01:48 +0800 | [diff] [blame] | 4569 | if (!kvm->arch.n_requested_mmu_pages) { |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4570 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
| 4571 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
| 4572 | } |
| 4573 | |
| 4574 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 4575 | spin_unlock(&kvm->mmu_lock); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4576 | kvm_flush_remote_tlbs(kvm); |
| 4577 | |
| 4578 | return 0; |
| 4579 | } |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 4580 | |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 4581 | void kvm_arch_flush_shadow(struct kvm *kvm) |
| 4582 | { |
| 4583 | kvm_mmu_zap_all(kvm); |
Marcelo Tosatti | 8986ecc | 2009-05-12 18:55:45 -0300 | [diff] [blame] | 4584 | kvm_reload_remote_mmus(kvm); |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 4585 | } |
| 4586 | |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 4587 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
| 4588 | { |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 4589 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
Jan Kiszka | 0496fbb | 2008-09-26 09:30:53 +0200 | [diff] [blame] | 4590 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
| 4591 | || vcpu->arch.nmi_pending; |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 4592 | } |
Zhang Xiantao | 5736199 | 2007-12-17 14:21:40 +0800 | [diff] [blame] | 4593 | |
Zhang Xiantao | 5736199 | 2007-12-17 14:21:40 +0800 | [diff] [blame] | 4594 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
| 4595 | { |
Marcelo Tosatti | 32f8840 | 2009-05-07 17:55:12 -0300 | [diff] [blame] | 4596 | int me; |
| 4597 | int cpu = vcpu->cpu; |
Zhang Xiantao | 5736199 | 2007-12-17 14:21:40 +0800 | [diff] [blame] | 4598 | |
| 4599 | if (waitqueue_active(&vcpu->wq)) { |
| 4600 | wake_up_interruptible(&vcpu->wq); |
| 4601 | ++vcpu->stat.halt_wakeup; |
| 4602 | } |
Marcelo Tosatti | 32f8840 | 2009-05-07 17:55:12 -0300 | [diff] [blame] | 4603 | |
| 4604 | me = get_cpu(); |
| 4605 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) |
| 4606 | if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests)) |
| 4607 | smp_send_reschedule(cpu); |
Marcelo Tosatti | e9571ed | 2008-04-11 15:01:22 -0300 | [diff] [blame] | 4608 | put_cpu(); |
Zhang Xiantao | 5736199 | 2007-12-17 14:21:40 +0800 | [diff] [blame] | 4609 | } |
Gleb Natapov | 7864612 | 2009-03-23 12:12:11 +0200 | [diff] [blame] | 4610 | |
| 4611 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) |
| 4612 | { |
| 4613 | return kvm_x86_ops->interrupt_allowed(vcpu); |
| 4614 | } |