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> |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame^] | 45 | #include <asm/mce.h> |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 46 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 47 | #define MAX_IO_MSRS 256 |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 48 | #define CR0_RESERVED_BITS \ |
| 49 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ |
| 50 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ |
| 51 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) |
| 52 | #define CR4_RESERVED_BITS \ |
| 53 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ |
| 54 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ |
| 55 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ |
| 56 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) |
| 57 | |
| 58 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame^] | 59 | |
| 60 | #define KVM_MAX_MCE_BANKS 32 |
| 61 | #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P |
| 62 | |
Joerg Roedel | 50a37eb | 2008-01-31 14:57:38 +0100 | [diff] [blame] | 63 | /* EFER defaults: |
| 64 | * - enable syscall per default because its emulated by KVM |
| 65 | * - enable LME and LMA per default on 64 bit KVM |
| 66 | */ |
| 67 | #ifdef CONFIG_X86_64 |
| 68 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; |
| 69 | #else |
| 70 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; |
| 71 | #endif |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 72 | |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 73 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
| 74 | #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] | 75 | |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 76 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
| 77 | struct kvm_cpuid_entry2 __user *entries); |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 78 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
| 79 | u32 function, u32 index); |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 80 | |
Zhang Xiantao | 97896d0 | 2007-11-14 20:09:30 +0800 | [diff] [blame] | 81 | struct kvm_x86_ops *kvm_x86_ops; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 82 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
Zhang Xiantao | 97896d0 | 2007-11-14 20:09:30 +0800 | [diff] [blame] | 83 | |
Hollis Blanchard | 417bc30 | 2007-10-31 17:24:23 -0500 | [diff] [blame] | 84 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 85 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
| 86 | { "pf_guest", VCPU_STAT(pf_guest) }, |
| 87 | { "tlb_flush", VCPU_STAT(tlb_flush) }, |
| 88 | { "invlpg", VCPU_STAT(invlpg) }, |
| 89 | { "exits", VCPU_STAT(exits) }, |
| 90 | { "io_exits", VCPU_STAT(io_exits) }, |
| 91 | { "mmio_exits", VCPU_STAT(mmio_exits) }, |
| 92 | { "signal_exits", VCPU_STAT(signal_exits) }, |
| 93 | { "irq_window", VCPU_STAT(irq_window_exits) }, |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 94 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 95 | { "halt_exits", VCPU_STAT(halt_exits) }, |
| 96 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
Amit Shah | f11c3a8 | 2008-02-21 01:00:30 +0530 | [diff] [blame] | 97 | { "hypercalls", VCPU_STAT(hypercalls) }, |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 98 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
| 99 | { "irq_exits", VCPU_STAT(irq_exits) }, |
| 100 | { "host_state_reload", VCPU_STAT(host_state_reload) }, |
| 101 | { "efer_reload", VCPU_STAT(efer_reload) }, |
| 102 | { "fpu_reload", VCPU_STAT(fpu_reload) }, |
| 103 | { "insn_emulation", VCPU_STAT(insn_emulation) }, |
| 104 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, |
Avi Kivity | fa89a81 | 2008-09-01 15:57:51 +0300 | [diff] [blame] | 105 | { "irq_injections", VCPU_STAT(irq_injections) }, |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 106 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
Avi Kivity | 4cee576 | 2007-11-18 16:37:07 +0200 | [diff] [blame] | 107 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
| 108 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, |
| 109 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, |
| 110 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, |
| 111 | { "mmu_flooded", VM_STAT(mmu_flooded) }, |
| 112 | { "mmu_recycled", VM_STAT(mmu_recycled) }, |
Avi Kivity | dfc5aa0 | 2007-12-18 19:47:18 +0200 | [diff] [blame] | 113 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
Marcelo Tosatti | 4731d4c | 2008-09-23 13:18:39 -0300 | [diff] [blame] | 114 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
Avi Kivity | 0f74a24 | 2007-11-20 23:01:14 +0200 | [diff] [blame] | 115 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
Marcelo Tosatti | 05da455 | 2008-02-23 11:44:30 -0300 | [diff] [blame] | 116 | { "largepages", VM_STAT(lpages) }, |
Hollis Blanchard | 417bc30 | 2007-10-31 17:24:23 -0500 | [diff] [blame] | 117 | { NULL } |
| 118 | }; |
| 119 | |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 120 | unsigned long segment_base(u16 selector) |
| 121 | { |
| 122 | struct descriptor_table gdt; |
Avi Kivity | a5f6130 | 2008-02-20 17:57:21 +0200 | [diff] [blame] | 123 | struct desc_struct *d; |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 124 | unsigned long table_base; |
| 125 | unsigned long v; |
| 126 | |
| 127 | if (selector == 0) |
| 128 | return 0; |
| 129 | |
| 130 | asm("sgdt %0" : "=m"(gdt)); |
| 131 | table_base = gdt.base; |
| 132 | |
| 133 | if (selector & 4) { /* from ldt */ |
| 134 | u16 ldt_selector; |
| 135 | |
| 136 | asm("sldt %0" : "=g"(ldt_selector)); |
| 137 | table_base = segment_base(ldt_selector); |
| 138 | } |
Avi Kivity | a5f6130 | 2008-02-20 17:57:21 +0200 | [diff] [blame] | 139 | d = (struct desc_struct *)(table_base + (selector & ~7)); |
| 140 | v = d->base0 | ((unsigned long)d->base1 << 16) | |
| 141 | ((unsigned long)d->base2 << 24); |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 142 | #ifdef CONFIG_X86_64 |
Avi Kivity | a5f6130 | 2008-02-20 17:57:21 +0200 | [diff] [blame] | 143 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) |
| 144 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; |
Carsten Otte | 5fb76f9 | 2007-10-29 16:08:51 +0100 | [diff] [blame] | 145 | #endif |
| 146 | return v; |
| 147 | } |
| 148 | EXPORT_SYMBOL_GPL(segment_base); |
| 149 | |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame] | 150 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
| 151 | { |
| 152 | if (irqchip_in_kernel(vcpu->kvm)) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 153 | return vcpu->arch.apic_base; |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame] | 154 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 155 | return vcpu->arch.apic_base; |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame] | 156 | } |
| 157 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); |
| 158 | |
| 159 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) |
| 160 | { |
| 161 | /* TODO: reserve bits check */ |
| 162 | if (irqchip_in_kernel(vcpu->kvm)) |
| 163 | kvm_lapic_set_base(vcpu, data); |
| 164 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 165 | vcpu->arch.apic_base = data; |
Carsten Otte | 6866b83 | 2007-10-29 16:09:10 +0100 | [diff] [blame] | 166 | } |
| 167 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); |
| 168 | |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 169 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
| 170 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 171 | WARN_ON(vcpu->arch.exception.pending); |
| 172 | vcpu->arch.exception.pending = true; |
| 173 | vcpu->arch.exception.has_error_code = false; |
| 174 | vcpu->arch.exception.nr = nr; |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 175 | } |
| 176 | EXPORT_SYMBOL_GPL(kvm_queue_exception); |
| 177 | |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 178 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
| 179 | u32 error_code) |
| 180 | { |
| 181 | ++vcpu->stat.pf_guest; |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 182 | |
Joerg Roedel | 71c4dfa | 2008-02-26 16:49:16 +0100 | [diff] [blame] | 183 | if (vcpu->arch.exception.pending) { |
| 184 | if (vcpu->arch.exception.nr == PF_VECTOR) { |
| 185 | printk(KERN_DEBUG "kvm: inject_page_fault:" |
| 186 | " double fault 0x%lx\n", addr); |
| 187 | vcpu->arch.exception.nr = DF_VECTOR; |
| 188 | vcpu->arch.exception.error_code = 0; |
| 189 | } else if (vcpu->arch.exception.nr == DF_VECTOR) { |
| 190 | /* triple fault -> shutdown */ |
| 191 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); |
| 192 | } |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 193 | return; |
| 194 | } |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 195 | vcpu->arch.cr2 = addr; |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 196 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
| 197 | } |
| 198 | |
Sheng Yang | 3419ffc | 2008-05-15 09:52:48 +0800 | [diff] [blame] | 199 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
| 200 | { |
| 201 | vcpu->arch.nmi_pending = 1; |
| 202 | } |
| 203 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); |
| 204 | |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 205 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
| 206 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 207 | WARN_ON(vcpu->arch.exception.pending); |
| 208 | vcpu->arch.exception.pending = true; |
| 209 | vcpu->arch.exception.has_error_code = true; |
| 210 | vcpu->arch.exception.nr = nr; |
| 211 | vcpu->arch.exception.error_code = error_code; |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 212 | } |
| 213 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); |
| 214 | |
| 215 | static void __queue_exception(struct kvm_vcpu *vcpu) |
| 216 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 217 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
| 218 | vcpu->arch.exception.has_error_code, |
| 219 | vcpu->arch.exception.error_code); |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 220 | } |
| 221 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 222 | /* |
| 223 | * Load the pae pdptrs. Return true is they are all valid. |
| 224 | */ |
| 225 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) |
| 226 | { |
| 227 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; |
| 228 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; |
| 229 | int i; |
| 230 | int ret; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 231 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 232 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 233 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
| 234 | offset * sizeof(u64), sizeof(pdpte)); |
| 235 | if (ret < 0) { |
| 236 | ret = 0; |
| 237 | goto out; |
| 238 | } |
| 239 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { |
Dong, Eddie | 20c466b | 2009-03-31 23:03:45 +0800 | [diff] [blame] | 240 | if (is_present_pte(pdpte[i]) && |
| 241 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 242 | ret = 0; |
| 243 | goto out; |
| 244 | } |
| 245 | } |
| 246 | ret = 1; |
| 247 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 248 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 249 | out: |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 250 | |
| 251 | return ret; |
| 252 | } |
Joerg Roedel | cc4b687 | 2008-02-07 13:47:43 +0100 | [diff] [blame] | 253 | EXPORT_SYMBOL_GPL(load_pdptrs); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 254 | |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 255 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
| 256 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 257 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 258 | bool changed = true; |
| 259 | int r; |
| 260 | |
| 261 | if (is_long_mode(vcpu) || !is_pae(vcpu)) |
| 262 | return false; |
| 263 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 264 | 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] | 265 | if (r < 0) |
| 266 | goto out; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 267 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 268 | out: |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 269 | |
| 270 | return changed; |
| 271 | } |
| 272 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 273 | void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 274 | { |
| 275 | if (cr0 & CR0_RESERVED_BITS) { |
| 276 | 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] | 277 | cr0, vcpu->arch.cr0); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 278 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 279 | return; |
| 280 | } |
| 281 | |
| 282 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { |
| 283 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 284 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 285 | return; |
| 286 | } |
| 287 | |
| 288 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { |
| 289 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " |
| 290 | "and a clear PE flag\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 291 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 292 | return; |
| 293 | } |
| 294 | |
| 295 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { |
| 296 | #ifdef CONFIG_X86_64 |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 297 | if ((vcpu->arch.shadow_efer & EFER_LME)) { |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 298 | int cs_db, cs_l; |
| 299 | |
| 300 | if (!is_pae(vcpu)) { |
| 301 | printk(KERN_DEBUG "set_cr0: #GP, start paging " |
| 302 | "in long mode while PAE is disabled\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 303 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 304 | return; |
| 305 | } |
| 306 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
| 307 | if (cs_l) { |
| 308 | printk(KERN_DEBUG "set_cr0: #GP, start paging " |
| 309 | "in long mode while CS.L == 1\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 310 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 311 | return; |
| 312 | |
| 313 | } |
| 314 | } else |
| 315 | #endif |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 316 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 317 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
| 318 | "reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 319 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 320 | return; |
| 321 | } |
| 322 | |
| 323 | } |
| 324 | |
| 325 | kvm_x86_ops->set_cr0(vcpu, cr0); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 326 | vcpu->arch.cr0 = cr0; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 327 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 328 | kvm_mmu_reset_context(vcpu); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 329 | return; |
| 330 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 331 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 332 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 333 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
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 | kvm_set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)); |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 336 | KVMTRACE_1D(LMSW, vcpu, |
| 337 | (u32)((vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)), |
| 338 | handler); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 339 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 340 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 341 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 342 | void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 343 | { |
Avi Kivity | a2edf57 | 2009-05-24 22:19:00 +0300 | [diff] [blame] | 344 | unsigned long old_cr4 = vcpu->arch.cr4; |
| 345 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE; |
| 346 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 347 | if (cr4 & CR4_RESERVED_BITS) { |
| 348 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 349 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 350 | return; |
| 351 | } |
| 352 | |
| 353 | if (is_long_mode(vcpu)) { |
| 354 | if (!(cr4 & X86_CR4_PAE)) { |
| 355 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " |
| 356 | "in long mode\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 357 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 358 | return; |
| 359 | } |
Avi Kivity | a2edf57 | 2009-05-24 22:19:00 +0300 | [diff] [blame] | 360 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
| 361 | && ((cr4 ^ old_cr4) & pdptr_bits) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 362 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 363 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 364 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 365 | return; |
| 366 | } |
| 367 | |
| 368 | if (cr4 & X86_CR4_VMXE) { |
| 369 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 370 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 371 | return; |
| 372 | } |
| 373 | kvm_x86_ops->set_cr4(vcpu, cr4); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 374 | vcpu->arch.cr4 = cr4; |
Avi Kivity | 5a41acc | 2009-01-11 17:19:35 +0200 | [diff] [blame] | 375 | 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] | 376 | kvm_mmu_reset_context(vcpu); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 377 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 378 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 379 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 380 | void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 381 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 382 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
Marcelo Tosatti | 0ba73cd | 2008-09-23 13:18:34 -0300 | [diff] [blame] | 383 | kvm_mmu_sync_roots(vcpu); |
Avi Kivity | d835dfe | 2007-11-21 02:57:59 +0200 | [diff] [blame] | 384 | kvm_mmu_flush_tlb(vcpu); |
| 385 | return; |
| 386 | } |
| 387 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 388 | if (is_long_mode(vcpu)) { |
| 389 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { |
| 390 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 391 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 392 | return; |
| 393 | } |
| 394 | } else { |
| 395 | if (is_pae(vcpu)) { |
| 396 | if (cr3 & CR3_PAE_RESERVED_BITS) { |
| 397 | printk(KERN_DEBUG |
| 398 | "set_cr3: #GP, reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 399 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 400 | return; |
| 401 | } |
| 402 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { |
| 403 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " |
| 404 | "reserved bits\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 405 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 406 | return; |
| 407 | } |
| 408 | } |
| 409 | /* |
| 410 | * We don't check reserved bits in nonpae mode, because |
| 411 | * this isn't enforced, and VMware depends on this. |
| 412 | */ |
| 413 | } |
| 414 | |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 415 | /* |
| 416 | * Does the new cr3 value map to physical memory? (Note, we |
| 417 | * catch an invalid cr3 even in real-mode, because it would |
| 418 | * cause trouble later on when we turn on paging anyway.) |
| 419 | * |
| 420 | * A real CPU would silently accept an invalid cr3 and would |
| 421 | * attempt to use it - with largely undefined (and often hard |
| 422 | * to debug) behavior on the guest side. |
| 423 | */ |
| 424 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 425 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 426 | else { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 427 | vcpu->arch.cr3 = cr3; |
| 428 | vcpu->arch.mmu.new_cr3(vcpu); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 429 | } |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 430 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 431 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 432 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 433 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 434 | { |
| 435 | if (cr8 & CR8_RESERVED_BITS) { |
| 436 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 437 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 438 | return; |
| 439 | } |
| 440 | if (irqchip_in_kernel(vcpu->kvm)) |
| 441 | kvm_lapic_set_tpr(vcpu, cr8); |
| 442 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 443 | vcpu->arch.cr8 = cr8; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 444 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 445 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 446 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 447 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 448 | { |
| 449 | if (irqchip_in_kernel(vcpu->kvm)) |
| 450 | return kvm_lapic_get_cr8(vcpu); |
| 451 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 452 | return vcpu->arch.cr8; |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 453 | } |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 454 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
Carsten Otte | a03490e | 2007-10-29 16:09:35 +0100 | [diff] [blame] | 455 | |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 456 | static inline u32 bit(int bitno) |
| 457 | { |
| 458 | return 1 << (bitno & 31); |
| 459 | } |
| 460 | |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 461 | /* |
| 462 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS |
| 463 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. |
| 464 | * |
| 465 | * This list is modified at module load time to reflect the |
| 466 | * capabilities of the host cpu. |
| 467 | */ |
| 468 | static u32 msrs_to_save[] = { |
| 469 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
| 470 | MSR_K6_STAR, |
| 471 | #ifdef CONFIG_X86_64 |
| 472 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
| 473 | #endif |
Jaswinder Singh Rajput | af24a4e | 2009-05-15 18:42:05 +0530 | [diff] [blame] | 474 | MSR_IA32_TSC, MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
Alexander Graf | b286d5d | 2008-11-25 20:17:05 +0100 | [diff] [blame] | 475 | MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 476 | }; |
| 477 | |
| 478 | static unsigned num_msrs_to_save; |
| 479 | |
| 480 | static u32 emulated_msrs[] = { |
| 481 | MSR_IA32_MISC_ENABLE, |
| 482 | }; |
| 483 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 484 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
| 485 | { |
Joerg Roedel | f2b4b7d | 2008-01-31 14:57:37 +0100 | [diff] [blame] | 486 | if (efer & efer_reserved_bits) { |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 487 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", |
| 488 | efer); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 489 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 490 | return; |
| 491 | } |
| 492 | |
| 493 | if (is_paging(vcpu) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 494 | && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) { |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 495 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 496 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 497 | return; |
| 498 | } |
| 499 | |
Alexander Graf | 1b2fd70 | 2009-02-02 16:23:51 +0100 | [diff] [blame] | 500 | if (efer & EFER_FFXSR) { |
| 501 | struct kvm_cpuid_entry2 *feat; |
| 502 | |
| 503 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); |
| 504 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) { |
| 505 | printk(KERN_DEBUG "set_efer: #GP, enable FFXSR w/o CPUID capability\n"); |
| 506 | kvm_inject_gp(vcpu, 0); |
| 507 | return; |
| 508 | } |
| 509 | } |
| 510 | |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 511 | if (efer & EFER_SVME) { |
| 512 | struct kvm_cpuid_entry2 *feat; |
| 513 | |
| 514 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); |
| 515 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) { |
| 516 | printk(KERN_DEBUG "set_efer: #GP, enable SVM w/o SVM\n"); |
| 517 | kvm_inject_gp(vcpu, 0); |
| 518 | return; |
| 519 | } |
| 520 | } |
| 521 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 522 | kvm_x86_ops->set_efer(vcpu, efer); |
| 523 | |
| 524 | efer &= ~EFER_LMA; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 525 | efer |= vcpu->arch.shadow_efer & EFER_LMA; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 526 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 527 | vcpu->arch.shadow_efer = efer; |
Avi Kivity | 9645bb56 | 2009-03-31 11:31:54 +0300 | [diff] [blame] | 528 | |
| 529 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; |
| 530 | kvm_mmu_reset_context(vcpu); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 531 | } |
| 532 | |
Joerg Roedel | f2b4b7d | 2008-01-31 14:57:37 +0100 | [diff] [blame] | 533 | void kvm_enable_efer_bits(u64 mask) |
| 534 | { |
| 535 | efer_reserved_bits &= ~mask; |
| 536 | } |
| 537 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); |
| 538 | |
| 539 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 540 | /* |
| 541 | * Writes msr value into into the appropriate "register". |
| 542 | * Returns 0 on success, non-0 otherwise. |
| 543 | * Assumes vcpu_load() was already called. |
| 544 | */ |
| 545 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) |
| 546 | { |
| 547 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); |
| 548 | } |
| 549 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 550 | /* |
| 551 | * Adapt set_msr() to msr_io()'s calling convention |
| 552 | */ |
| 553 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
| 554 | { |
| 555 | return kvm_set_msr(vcpu, index, *data); |
| 556 | } |
| 557 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 558 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
| 559 | { |
| 560 | static int version; |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 561 | struct pvclock_wall_clock wc; |
| 562 | struct timespec now, sys, boot; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 563 | |
| 564 | if (!wall_clock) |
| 565 | return; |
| 566 | |
| 567 | version++; |
| 568 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 569 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
| 570 | |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 571 | /* |
| 572 | * The guest calculates current wall clock time by adding |
| 573 | * system time (updated by kvm_write_guest_time below) to the |
| 574 | * wall clock specified here. guest system time equals host |
| 575 | * system time for us, thus we must fill in host boot time here. |
| 576 | */ |
| 577 | now = current_kernel_time(); |
| 578 | ktime_get_ts(&sys); |
| 579 | boot = ns_to_timespec(timespec_to_ns(&now) - timespec_to_ns(&sys)); |
| 580 | |
| 581 | wc.sec = boot.tv_sec; |
| 582 | wc.nsec = boot.tv_nsec; |
| 583 | wc.version = version; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 584 | |
| 585 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); |
| 586 | |
| 587 | version++; |
| 588 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 589 | } |
| 590 | |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 591 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
| 592 | { |
| 593 | uint32_t quotient, remainder; |
| 594 | |
| 595 | /* Don't try to replace with do_div(), this one calculates |
| 596 | * "(dividend << 32) / divisor" */ |
| 597 | __asm__ ( "divl %4" |
| 598 | : "=a" (quotient), "=d" (remainder) |
| 599 | : "0" (0), "1" (dividend), "r" (divisor) ); |
| 600 | return quotient; |
| 601 | } |
| 602 | |
| 603 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) |
| 604 | { |
| 605 | uint64_t nsecs = 1000000000LL; |
| 606 | int32_t shift = 0; |
| 607 | uint64_t tps64; |
| 608 | uint32_t tps32; |
| 609 | |
| 610 | tps64 = tsc_khz * 1000LL; |
| 611 | while (tps64 > nsecs*2) { |
| 612 | tps64 >>= 1; |
| 613 | shift--; |
| 614 | } |
| 615 | |
| 616 | tps32 = (uint32_t)tps64; |
| 617 | while (tps32 <= (uint32_t)nsecs) { |
| 618 | tps32 <<= 1; |
| 619 | shift++; |
| 620 | } |
| 621 | |
| 622 | hv_clock->tsc_shift = shift; |
| 623 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); |
| 624 | |
| 625 | 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] | 626 | __func__, tsc_khz, hv_clock->tsc_shift, |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 627 | hv_clock->tsc_to_system_mul); |
| 628 | } |
| 629 | |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 630 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
| 631 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 632 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
| 633 | { |
| 634 | struct timespec ts; |
| 635 | unsigned long flags; |
| 636 | struct kvm_vcpu_arch *vcpu = &v->arch; |
| 637 | void *shared_kaddr; |
Avi Kivity | 463656c | 2009-04-12 15:49:07 +0300 | [diff] [blame] | 638 | unsigned long this_tsc_khz; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 639 | |
| 640 | if ((!vcpu->time_page)) |
| 641 | return; |
| 642 | |
Avi Kivity | 463656c | 2009-04-12 15:49:07 +0300 | [diff] [blame] | 643 | this_tsc_khz = get_cpu_var(cpu_tsc_khz); |
| 644 | if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) { |
| 645 | kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock); |
| 646 | vcpu->hv_clock_tsc_khz = this_tsc_khz; |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 647 | } |
Avi Kivity | 463656c | 2009-04-12 15:49:07 +0300 | [diff] [blame] | 648 | put_cpu_var(cpu_tsc_khz); |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 649 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 650 | /* Keep irq disabled to prevent changes to the clock */ |
| 651 | local_irq_save(flags); |
Jaswinder Singh Rajput | af24a4e | 2009-05-15 18:42:05 +0530 | [diff] [blame] | 652 | kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 653 | ktime_get_ts(&ts); |
| 654 | local_irq_restore(flags); |
| 655 | |
| 656 | /* With all the info we got, fill in the values */ |
| 657 | |
| 658 | vcpu->hv_clock.system_time = ts.tv_nsec + |
| 659 | (NSEC_PER_SEC * (u64)ts.tv_sec); |
| 660 | /* |
| 661 | * The interface expects us to write an even number signaling that the |
| 662 | * update is finished. Since the guest won't see the intermediate |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 663 | * state, we just increase by 2 at the end. |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 664 | */ |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 665 | vcpu->hv_clock.version += 2; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 666 | |
| 667 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); |
| 668 | |
| 669 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, |
Gerd Hoffmann | 50d0a0f | 2008-06-03 16:17:31 +0200 | [diff] [blame] | 670 | sizeof(vcpu->hv_clock)); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 671 | |
| 672 | kunmap_atomic(shared_kaddr, KM_USER0); |
| 673 | |
| 674 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); |
| 675 | } |
| 676 | |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 677 | static int kvm_request_guest_time_update(struct kvm_vcpu *v) |
| 678 | { |
| 679 | struct kvm_vcpu_arch *vcpu = &v->arch; |
| 680 | |
| 681 | if (!vcpu->time_page) |
| 682 | return 0; |
| 683 | set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests); |
| 684 | return 1; |
| 685 | } |
| 686 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 687 | static bool msr_mtrr_valid(unsigned msr) |
| 688 | { |
| 689 | switch (msr) { |
| 690 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: |
| 691 | case MSR_MTRRfix64K_00000: |
| 692 | case MSR_MTRRfix16K_80000: |
| 693 | case MSR_MTRRfix16K_A0000: |
| 694 | case MSR_MTRRfix4K_C0000: |
| 695 | case MSR_MTRRfix4K_C8000: |
| 696 | case MSR_MTRRfix4K_D0000: |
| 697 | case MSR_MTRRfix4K_D8000: |
| 698 | case MSR_MTRRfix4K_E0000: |
| 699 | case MSR_MTRRfix4K_E8000: |
| 700 | case MSR_MTRRfix4K_F0000: |
| 701 | case MSR_MTRRfix4K_F8000: |
| 702 | case MSR_MTRRdefType: |
| 703 | case MSR_IA32_CR_PAT: |
| 704 | return true; |
| 705 | case 0x2f8: |
| 706 | return true; |
| 707 | } |
| 708 | return false; |
| 709 | } |
| 710 | |
Marcelo Tosatti | d6289b9 | 2009-06-22 15:27:56 -0300 | [diff] [blame] | 711 | static bool valid_pat_type(unsigned t) |
| 712 | { |
| 713 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ |
| 714 | } |
| 715 | |
| 716 | static bool valid_mtrr_type(unsigned t) |
| 717 | { |
| 718 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ |
| 719 | } |
| 720 | |
| 721 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 722 | { |
| 723 | int i; |
| 724 | |
| 725 | if (!msr_mtrr_valid(msr)) |
| 726 | return false; |
| 727 | |
| 728 | if (msr == MSR_IA32_CR_PAT) { |
| 729 | for (i = 0; i < 8; i++) |
| 730 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) |
| 731 | return false; |
| 732 | return true; |
| 733 | } else if (msr == MSR_MTRRdefType) { |
| 734 | if (data & ~0xcff) |
| 735 | return false; |
| 736 | return valid_mtrr_type(data & 0xff); |
| 737 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { |
| 738 | for (i = 0; i < 8 ; i++) |
| 739 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) |
| 740 | return false; |
| 741 | return true; |
| 742 | } |
| 743 | |
| 744 | /* variable MTRRs */ |
| 745 | return valid_mtrr_type(data & 0xff); |
| 746 | } |
| 747 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 748 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 749 | { |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 750 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
| 751 | |
Marcelo Tosatti | d6289b9 | 2009-06-22 15:27:56 -0300 | [diff] [blame] | 752 | if (!mtrr_valid(vcpu, msr, data)) |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 753 | return 1; |
| 754 | |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 755 | if (msr == MSR_MTRRdefType) { |
| 756 | vcpu->arch.mtrr_state.def_type = data; |
| 757 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; |
| 758 | } else if (msr == MSR_MTRRfix64K_00000) |
| 759 | p[0] = data; |
| 760 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) |
| 761 | p[1 + msr - MSR_MTRRfix16K_80000] = data; |
| 762 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) |
| 763 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; |
| 764 | else if (msr == MSR_IA32_CR_PAT) |
| 765 | vcpu->arch.pat = data; |
| 766 | else { /* Variable MTRRs */ |
| 767 | int idx, is_mtrr_mask; |
| 768 | u64 *pt; |
| 769 | |
| 770 | idx = (msr - 0x200) / 2; |
| 771 | is_mtrr_mask = msr - 0x200 - 2 * idx; |
| 772 | if (!is_mtrr_mask) |
| 773 | pt = |
| 774 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; |
| 775 | else |
| 776 | pt = |
| 777 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; |
| 778 | *pt = data; |
| 779 | } |
| 780 | |
| 781 | kvm_mmu_reset_context(vcpu); |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 782 | return 0; |
| 783 | } |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 784 | |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame^] | 785 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 786 | { |
| 787 | u64 mcg_cap = vcpu->arch.mcg_cap; |
| 788 | unsigned bank_num = mcg_cap & 0xff; |
| 789 | |
| 790 | switch (msr) { |
| 791 | case MSR_IA32_MCG_STATUS: |
| 792 | vcpu->arch.mcg_status = data; |
| 793 | break; |
| 794 | case MSR_IA32_MCG_CTL: |
| 795 | if (!(mcg_cap & MCG_CTL_P)) |
| 796 | return 1; |
| 797 | if (data != 0 && data != ~(u64)0) |
| 798 | return -1; |
| 799 | vcpu->arch.mcg_ctl = data; |
| 800 | break; |
| 801 | default: |
| 802 | if (msr >= MSR_IA32_MC0_CTL && |
| 803 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { |
| 804 | u32 offset = msr - MSR_IA32_MC0_CTL; |
| 805 | /* only 0 or all 1s can be written to IA32_MCi_CTL */ |
| 806 | if ((offset & 0x3) == 0 && |
| 807 | data != 0 && data != ~(u64)0) |
| 808 | return -1; |
| 809 | vcpu->arch.mce_banks[offset] = data; |
| 810 | break; |
| 811 | } |
| 812 | return 1; |
| 813 | } |
| 814 | return 0; |
| 815 | } |
| 816 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 817 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
| 818 | { |
| 819 | switch (msr) { |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 820 | case MSR_EFER: |
| 821 | set_efer(vcpu, data); |
| 822 | break; |
Alexander Graf | b5e2fec | 2008-07-22 08:00:45 +0200 | [diff] [blame] | 823 | case MSR_IA32_DEBUGCTLMSR: |
| 824 | if (!data) { |
| 825 | /* We support the non-activated case already */ |
| 826 | break; |
| 827 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { |
| 828 | /* Values other than LBR and BTF are vendor-specific, |
| 829 | thus reserved and should throw a #GP */ |
| 830 | return 1; |
| 831 | } |
| 832 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
| 833 | __func__, data); |
| 834 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 835 | case MSR_IA32_UCODE_REV: |
| 836 | case MSR_IA32_UCODE_WRITE: |
Avi Kivity | 61a6bd6 | 2008-12-29 17:32:28 +0200 | [diff] [blame] | 837 | case MSR_VM_HSAVE_PA: |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 838 | break; |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 839 | case 0x200 ... 0x2ff: |
| 840 | return set_msr_mtrr(vcpu, msr, data); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 841 | case MSR_IA32_APICBASE: |
| 842 | kvm_set_apic_base(vcpu, data); |
| 843 | break; |
| 844 | case MSR_IA32_MISC_ENABLE: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 845 | vcpu->arch.ia32_misc_enable_msr = data; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 846 | break; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 847 | case MSR_KVM_WALL_CLOCK: |
| 848 | vcpu->kvm->arch.wall_clock = data; |
| 849 | kvm_write_wall_clock(vcpu->kvm, data); |
| 850 | break; |
| 851 | case MSR_KVM_SYSTEM_TIME: { |
| 852 | if (vcpu->arch.time_page) { |
| 853 | kvm_release_page_dirty(vcpu->arch.time_page); |
| 854 | vcpu->arch.time_page = NULL; |
| 855 | } |
| 856 | |
| 857 | vcpu->arch.time = data; |
| 858 | |
| 859 | /* we verify if the enable bit is set... */ |
| 860 | if (!(data & 1)) |
| 861 | break; |
| 862 | |
| 863 | /* ...but clean it before doing the actual write */ |
| 864 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); |
| 865 | |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 866 | vcpu->arch.time_page = |
| 867 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 868 | |
| 869 | if (is_error_page(vcpu->arch.time_page)) { |
| 870 | kvm_release_page_clean(vcpu->arch.time_page); |
| 871 | vcpu->arch.time_page = NULL; |
| 872 | } |
| 873 | |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 874 | kvm_request_guest_time_update(vcpu); |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 875 | break; |
| 876 | } |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame^] | 877 | case MSR_IA32_MCG_CTL: |
| 878 | case MSR_IA32_MCG_STATUS: |
| 879 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: |
| 880 | return set_msr_mce(vcpu, msr, data); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 881 | default: |
Avi Kivity | 565f1fb | 2007-12-19 12:02:40 +0200 | [diff] [blame] | 882 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", msr, data); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 883 | return 1; |
| 884 | } |
| 885 | return 0; |
| 886 | } |
| 887 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); |
| 888 | |
| 889 | |
| 890 | /* |
| 891 | * Reads an msr value (of 'msr_index') into 'pdata'. |
| 892 | * Returns 0 on success, non-0 otherwise. |
| 893 | * Assumes vcpu_load() was already called. |
| 894 | */ |
| 895 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
| 896 | { |
| 897 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); |
| 898 | } |
| 899 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 900 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
| 901 | { |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 902 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
| 903 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 904 | if (!msr_mtrr_valid(msr)) |
| 905 | return 1; |
| 906 | |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 907 | if (msr == MSR_MTRRdefType) |
| 908 | *pdata = vcpu->arch.mtrr_state.def_type + |
| 909 | (vcpu->arch.mtrr_state.enabled << 10); |
| 910 | else if (msr == MSR_MTRRfix64K_00000) |
| 911 | *pdata = p[0]; |
| 912 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) |
| 913 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; |
| 914 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) |
| 915 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; |
| 916 | else if (msr == MSR_IA32_CR_PAT) |
| 917 | *pdata = vcpu->arch.pat; |
| 918 | else { /* Variable MTRRs */ |
| 919 | int idx, is_mtrr_mask; |
| 920 | u64 *pt; |
| 921 | |
| 922 | idx = (msr - 0x200) / 2; |
| 923 | is_mtrr_mask = msr - 0x200 - 2 * idx; |
| 924 | if (!is_mtrr_mask) |
| 925 | pt = |
| 926 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; |
| 927 | else |
| 928 | pt = |
| 929 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; |
| 930 | *pdata = *pt; |
| 931 | } |
| 932 | |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 933 | return 0; |
| 934 | } |
| 935 | |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame^] | 936 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
| 937 | { |
| 938 | u64 data; |
| 939 | u64 mcg_cap = vcpu->arch.mcg_cap; |
| 940 | unsigned bank_num = mcg_cap & 0xff; |
| 941 | |
| 942 | switch (msr) { |
| 943 | case MSR_IA32_P5_MC_ADDR: |
| 944 | case MSR_IA32_P5_MC_TYPE: |
| 945 | data = 0; |
| 946 | break; |
| 947 | case MSR_IA32_MCG_CAP: |
| 948 | data = vcpu->arch.mcg_cap; |
| 949 | break; |
| 950 | case MSR_IA32_MCG_CTL: |
| 951 | if (!(mcg_cap & MCG_CTL_P)) |
| 952 | return 1; |
| 953 | data = vcpu->arch.mcg_ctl; |
| 954 | break; |
| 955 | case MSR_IA32_MCG_STATUS: |
| 956 | data = vcpu->arch.mcg_status; |
| 957 | break; |
| 958 | default: |
| 959 | if (msr >= MSR_IA32_MC0_CTL && |
| 960 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { |
| 961 | u32 offset = msr - MSR_IA32_MC0_CTL; |
| 962 | data = vcpu->arch.mce_banks[offset]; |
| 963 | break; |
| 964 | } |
| 965 | return 1; |
| 966 | } |
| 967 | *pdata = data; |
| 968 | return 0; |
| 969 | } |
| 970 | |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 971 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
| 972 | { |
| 973 | u64 data; |
| 974 | |
| 975 | switch (msr) { |
| 976 | case 0xc0010010: /* SYSCFG */ |
| 977 | case 0xc0010015: /* HWCR */ |
| 978 | case MSR_IA32_PLATFORM_ID: |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 979 | case MSR_IA32_UCODE_REV: |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 980 | case MSR_IA32_EBL_CR_POWERON: |
Alexander Graf | b5e2fec | 2008-07-22 08:00:45 +0200 | [diff] [blame] | 981 | case MSR_IA32_DEBUGCTLMSR: |
| 982 | case MSR_IA32_LASTBRANCHFROMIP: |
| 983 | case MSR_IA32_LASTBRANCHTOIP: |
| 984 | case MSR_IA32_LASTINTFROMIP: |
| 985 | case MSR_IA32_LASTINTTOIP: |
Avi Kivity | 61a6bd6 | 2008-12-29 17:32:28 +0200 | [diff] [blame] | 986 | case MSR_VM_HSAVE_PA: |
Amit Shah | 7fe29e0 | 2009-03-20 12:39:00 +0530 | [diff] [blame] | 987 | case MSR_P6_EVNTSEL0: |
| 988 | case MSR_P6_EVNTSEL1: |
Amit Shah | 9e69962 | 2009-06-15 13:25:34 +0530 | [diff] [blame] | 989 | case MSR_K7_EVNTSEL0: |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 990 | data = 0; |
| 991 | break; |
Avi Kivity | 9ba075a | 2008-05-26 20:06:35 +0300 | [diff] [blame] | 992 | case MSR_MTRRcap: |
| 993 | data = 0x500 | KVM_NR_VAR_MTRR; |
| 994 | break; |
| 995 | case 0x200 ... 0x2ff: |
| 996 | return get_msr_mtrr(vcpu, msr, pdata); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 997 | case 0xcd: /* fsb frequency */ |
| 998 | data = 3; |
| 999 | break; |
| 1000 | case MSR_IA32_APICBASE: |
| 1001 | data = kvm_get_apic_base(vcpu); |
| 1002 | break; |
| 1003 | case MSR_IA32_MISC_ENABLE: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1004 | data = vcpu->arch.ia32_misc_enable_msr; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1005 | break; |
Alexander Graf | 847f0ad | 2008-02-21 12:11:01 +0100 | [diff] [blame] | 1006 | case MSR_IA32_PERF_STATUS: |
| 1007 | /* TSC increment by tick */ |
| 1008 | data = 1000ULL; |
| 1009 | /* CPU multiplier */ |
| 1010 | data |= (((uint64_t)4ULL) << 40); |
| 1011 | break; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1012 | case MSR_EFER: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1013 | data = vcpu->arch.shadow_efer; |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1014 | break; |
Glauber de Oliveira Costa | 1806852 | 2008-02-15 17:52:47 -0200 | [diff] [blame] | 1015 | case MSR_KVM_WALL_CLOCK: |
| 1016 | data = vcpu->kvm->arch.wall_clock; |
| 1017 | break; |
| 1018 | case MSR_KVM_SYSTEM_TIME: |
| 1019 | data = vcpu->arch.time; |
| 1020 | break; |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame^] | 1021 | case MSR_IA32_P5_MC_ADDR: |
| 1022 | case MSR_IA32_P5_MC_TYPE: |
| 1023 | case MSR_IA32_MCG_CAP: |
| 1024 | case MSR_IA32_MCG_CTL: |
| 1025 | case MSR_IA32_MCG_STATUS: |
| 1026 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: |
| 1027 | return get_msr_mce(vcpu, msr, pdata); |
Carsten Otte | 15c4a64 | 2007-10-30 18:44:17 +0100 | [diff] [blame] | 1028 | default: |
| 1029 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); |
| 1030 | return 1; |
| 1031 | } |
| 1032 | *pdata = data; |
| 1033 | return 0; |
| 1034 | } |
| 1035 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); |
| 1036 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1037 | /* |
| 1038 | * Read or write a bunch of msrs. All parameters are kernel addresses. |
| 1039 | * |
| 1040 | * @return number of msrs set successfully. |
| 1041 | */ |
| 1042 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
| 1043 | struct kvm_msr_entry *entries, |
| 1044 | int (*do_msr)(struct kvm_vcpu *vcpu, |
| 1045 | unsigned index, u64 *data)) |
| 1046 | { |
| 1047 | int i; |
| 1048 | |
| 1049 | vcpu_load(vcpu); |
| 1050 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 1051 | down_read(&vcpu->kvm->slots_lock); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1052 | for (i = 0; i < msrs->nmsrs; ++i) |
| 1053 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) |
| 1054 | break; |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 1055 | up_read(&vcpu->kvm->slots_lock); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1056 | |
| 1057 | vcpu_put(vcpu); |
| 1058 | |
| 1059 | return i; |
| 1060 | } |
| 1061 | |
| 1062 | /* |
| 1063 | * Read or write a bunch of msrs. Parameters are user addresses. |
| 1064 | * |
| 1065 | * @return number of msrs set successfully. |
| 1066 | */ |
| 1067 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
| 1068 | int (*do_msr)(struct kvm_vcpu *vcpu, |
| 1069 | unsigned index, u64 *data), |
| 1070 | int writeback) |
| 1071 | { |
| 1072 | struct kvm_msrs msrs; |
| 1073 | struct kvm_msr_entry *entries; |
| 1074 | int r, n; |
| 1075 | unsigned size; |
| 1076 | |
| 1077 | r = -EFAULT; |
| 1078 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) |
| 1079 | goto out; |
| 1080 | |
| 1081 | r = -E2BIG; |
| 1082 | if (msrs.nmsrs >= MAX_IO_MSRS) |
| 1083 | goto out; |
| 1084 | |
| 1085 | r = -ENOMEM; |
| 1086 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
| 1087 | entries = vmalloc(size); |
| 1088 | if (!entries) |
| 1089 | goto out; |
| 1090 | |
| 1091 | r = -EFAULT; |
| 1092 | if (copy_from_user(entries, user_msrs->entries, size)) |
| 1093 | goto out_free; |
| 1094 | |
| 1095 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
| 1096 | if (r < 0) |
| 1097 | goto out_free; |
| 1098 | |
| 1099 | r = -EFAULT; |
| 1100 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) |
| 1101 | goto out_free; |
| 1102 | |
| 1103 | r = n; |
| 1104 | |
| 1105 | out_free: |
| 1106 | vfree(entries); |
| 1107 | out: |
| 1108 | return r; |
| 1109 | } |
| 1110 | |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 1111 | int kvm_dev_ioctl_check_extension(long ext) |
| 1112 | { |
| 1113 | int r; |
| 1114 | |
| 1115 | switch (ext) { |
| 1116 | case KVM_CAP_IRQCHIP: |
| 1117 | case KVM_CAP_HLT: |
| 1118 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 1119 | case KVM_CAP_SET_TSS_ADDR: |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1120 | case KVM_CAP_EXT_CPUID: |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 1121 | case KVM_CAP_CLOCKSOURCE: |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 1122 | case KVM_CAP_PIT: |
Marcelo Tosatti | a28e4f5 | 2008-02-22 12:21:36 -0500 | [diff] [blame] | 1123 | case KVM_CAP_NOP_IO_DELAY: |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 1124 | case KVM_CAP_MP_STATE: |
Avi Kivity | ed84862 | 2008-07-29 11:30:57 +0300 | [diff] [blame] | 1125 | case KVM_CAP_SYNC_MMU: |
Marcelo Tosatti | 52d939a | 2008-12-30 15:55:06 -0200 | [diff] [blame] | 1126 | case KVM_CAP_REINJECT_CONTROL: |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 1127 | case KVM_CAP_IRQ_INJECT_STATUS: |
Sheng Yang | e56d532 | 2009-03-12 21:45:39 +0800 | [diff] [blame] | 1128 | case KVM_CAP_ASSIGN_DEV_IRQ: |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 1129 | r = 1; |
| 1130 | break; |
Laurent Vivier | 542472b | 2008-05-30 16:05:55 +0200 | [diff] [blame] | 1131 | case KVM_CAP_COALESCED_MMIO: |
| 1132 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; |
| 1133 | break; |
Avi Kivity | 774ead3 | 2007-12-26 13:57:04 +0200 | [diff] [blame] | 1134 | case KVM_CAP_VAPIC: |
| 1135 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); |
| 1136 | break; |
Avi Kivity | f725230 | 2008-02-20 11:53:16 +0200 | [diff] [blame] | 1137 | case KVM_CAP_NR_VCPUS: |
| 1138 | r = KVM_MAX_VCPUS; |
| 1139 | break; |
Avi Kivity | a988b91 | 2008-02-20 11:59:20 +0200 | [diff] [blame] | 1140 | case KVM_CAP_NR_MEMSLOTS: |
| 1141 | r = KVM_MEMORY_SLOTS; |
| 1142 | break; |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 1143 | case KVM_CAP_PV_MMU: |
| 1144 | r = !tdp_enabled; |
| 1145 | break; |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 1146 | case KVM_CAP_IOMMU: |
Joerg Roedel | 19de40a | 2008-12-03 14:43:34 +0100 | [diff] [blame] | 1147 | r = iommu_found(); |
Ben-Ami Yassour | 62c476c | 2008-09-14 03:48:28 +0300 | [diff] [blame] | 1148 | break; |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame^] | 1149 | case KVM_CAP_MCE: |
| 1150 | r = KVM_MAX_MCE_BANKS; |
| 1151 | break; |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 1152 | default: |
| 1153 | r = 0; |
| 1154 | break; |
| 1155 | } |
| 1156 | return r; |
| 1157 | |
| 1158 | } |
| 1159 | |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 1160 | long kvm_arch_dev_ioctl(struct file *filp, |
| 1161 | unsigned int ioctl, unsigned long arg) |
| 1162 | { |
| 1163 | void __user *argp = (void __user *)arg; |
| 1164 | long r; |
| 1165 | |
| 1166 | switch (ioctl) { |
| 1167 | case KVM_GET_MSR_INDEX_LIST: { |
| 1168 | struct kvm_msr_list __user *user_msr_list = argp; |
| 1169 | struct kvm_msr_list msr_list; |
| 1170 | unsigned n; |
| 1171 | |
| 1172 | r = -EFAULT; |
| 1173 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) |
| 1174 | goto out; |
| 1175 | n = msr_list.nmsrs; |
| 1176 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
| 1177 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
| 1178 | goto out; |
| 1179 | r = -E2BIG; |
Jan Kiszka | e125e7b | 2009-07-02 21:45:47 +0200 | [diff] [blame] | 1180 | if (n < msr_list.nmsrs) |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 1181 | goto out; |
| 1182 | r = -EFAULT; |
| 1183 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, |
| 1184 | num_msrs_to_save * sizeof(u32))) |
| 1185 | goto out; |
Jan Kiszka | e125e7b | 2009-07-02 21:45:47 +0200 | [diff] [blame] | 1186 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 1187 | &emulated_msrs, |
| 1188 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) |
| 1189 | goto out; |
| 1190 | r = 0; |
| 1191 | break; |
| 1192 | } |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 1193 | case KVM_GET_SUPPORTED_CPUID: { |
| 1194 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
| 1195 | struct kvm_cpuid2 cpuid; |
| 1196 | |
| 1197 | r = -EFAULT; |
| 1198 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 1199 | goto out; |
| 1200 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1201 | cpuid_arg->entries); |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 1202 | if (r) |
| 1203 | goto out; |
| 1204 | |
| 1205 | r = -EFAULT; |
| 1206 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) |
| 1207 | goto out; |
| 1208 | r = 0; |
| 1209 | break; |
| 1210 | } |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame^] | 1211 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
| 1212 | u64 mce_cap; |
| 1213 | |
| 1214 | mce_cap = KVM_MCE_CAP_SUPPORTED; |
| 1215 | r = -EFAULT; |
| 1216 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) |
| 1217 | goto out; |
| 1218 | r = 0; |
| 1219 | break; |
| 1220 | } |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 1221 | default: |
| 1222 | r = -EINVAL; |
| 1223 | } |
| 1224 | out: |
| 1225 | return r; |
| 1226 | } |
| 1227 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1228 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| 1229 | { |
| 1230 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 1231 | kvm_request_guest_time_update(vcpu); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1232 | } |
| 1233 | |
| 1234 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| 1235 | { |
| 1236 | kvm_x86_ops->vcpu_put(vcpu); |
Amit Shah | 9327fd1 | 2007-11-15 18:38:46 +0200 | [diff] [blame] | 1237 | kvm_put_guest_fpu(vcpu); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1238 | } |
| 1239 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1240 | static int is_efer_nx(void) |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1241 | { |
Avi Kivity | e286e86 | 2009-05-03 18:50:55 +0300 | [diff] [blame] | 1242 | unsigned long long efer = 0; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1243 | |
Avi Kivity | e286e86 | 2009-05-03 18:50:55 +0300 | [diff] [blame] | 1244 | rdmsrl_safe(MSR_EFER, &efer); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1245 | return efer & EFER_NX; |
| 1246 | } |
| 1247 | |
| 1248 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) |
| 1249 | { |
| 1250 | int i; |
| 1251 | struct kvm_cpuid_entry2 *e, *entry; |
| 1252 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1253 | entry = NULL; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1254 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
| 1255 | e = &vcpu->arch.cpuid_entries[i]; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1256 | if (e->function == 0x80000001) { |
| 1257 | entry = e; |
| 1258 | break; |
| 1259 | } |
| 1260 | } |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1261 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1262 | entry->edx &= ~(1 << 20); |
| 1263 | printk(KERN_INFO "kvm: guest NX capability removed\n"); |
| 1264 | } |
| 1265 | } |
| 1266 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1267 | /* when an old userspace process fills a new kernel module */ |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1268 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
| 1269 | struct kvm_cpuid *cpuid, |
| 1270 | struct kvm_cpuid_entry __user *entries) |
| 1271 | { |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1272 | int r, i; |
| 1273 | struct kvm_cpuid_entry *cpuid_entries; |
| 1274 | |
| 1275 | r = -E2BIG; |
| 1276 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
| 1277 | goto out; |
| 1278 | r = -ENOMEM; |
| 1279 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); |
| 1280 | if (!cpuid_entries) |
| 1281 | goto out; |
| 1282 | r = -EFAULT; |
| 1283 | if (copy_from_user(cpuid_entries, entries, |
| 1284 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) |
| 1285 | goto out_free; |
| 1286 | for (i = 0; i < cpuid->nent; i++) { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1287 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
| 1288 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; |
| 1289 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; |
| 1290 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; |
| 1291 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; |
| 1292 | vcpu->arch.cpuid_entries[i].index = 0; |
| 1293 | vcpu->arch.cpuid_entries[i].flags = 0; |
| 1294 | vcpu->arch.cpuid_entries[i].padding[0] = 0; |
| 1295 | vcpu->arch.cpuid_entries[i].padding[1] = 0; |
| 1296 | vcpu->arch.cpuid_entries[i].padding[2] = 0; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1297 | } |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1298 | vcpu->arch.cpuid_nent = cpuid->nent; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1299 | cpuid_fix_nx_cap(vcpu); |
| 1300 | r = 0; |
| 1301 | |
| 1302 | out_free: |
| 1303 | vfree(cpuid_entries); |
| 1304 | out: |
| 1305 | return r; |
| 1306 | } |
| 1307 | |
| 1308 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1309 | struct kvm_cpuid2 *cpuid, |
| 1310 | struct kvm_cpuid_entry2 __user *entries) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1311 | { |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1312 | int r; |
| 1313 | |
| 1314 | r = -E2BIG; |
| 1315 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
| 1316 | goto out; |
| 1317 | r = -EFAULT; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1318 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1319 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1320 | goto out; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1321 | vcpu->arch.cpuid_nent = cpuid->nent; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1322 | return 0; |
| 1323 | |
| 1324 | out: |
| 1325 | return r; |
| 1326 | } |
| 1327 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1328 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1329 | struct kvm_cpuid2 *cpuid, |
| 1330 | struct kvm_cpuid_entry2 __user *entries) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1331 | { |
| 1332 | int r; |
| 1333 | |
| 1334 | r = -E2BIG; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1335 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1336 | goto out; |
| 1337 | r = -EFAULT; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1338 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1339 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1340 | goto out; |
| 1341 | return 0; |
| 1342 | |
| 1343 | out: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1344 | cpuid->nent = vcpu->arch.cpuid_nent; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1345 | return r; |
| 1346 | } |
| 1347 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1348 | 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] | 1349 | u32 index) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1350 | { |
| 1351 | entry->function = function; |
| 1352 | entry->index = index; |
| 1353 | cpuid_count(entry->function, entry->index, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1354 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1355 | entry->flags = 0; |
| 1356 | } |
| 1357 | |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1358 | #define F(x) bit(X86_FEATURE_##x) |
| 1359 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1360 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
| 1361 | u32 index, int *nent, int maxnent) |
| 1362 | { |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1363 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1364 | #ifdef CONFIG_X86_64 |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1365 | unsigned f_lm = F(LM); |
| 1366 | #else |
| 1367 | unsigned f_lm = 0; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1368 | #endif |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1369 | |
| 1370 | /* cpuid 1.edx */ |
| 1371 | const u32 kvm_supported_word0_x86_features = |
| 1372 | F(FPU) | F(VME) | F(DE) | F(PSE) | |
| 1373 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | |
| 1374 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | |
| 1375 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | |
| 1376 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | |
| 1377 | 0 /* Reserved, DS, ACPI */ | F(MMX) | |
| 1378 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | |
| 1379 | 0 /* HTT, TM, Reserved, PBE */; |
| 1380 | /* cpuid 0x80000001.edx */ |
| 1381 | const u32 kvm_supported_word1_x86_features = |
| 1382 | F(FPU) | F(VME) | F(DE) | F(PSE) | |
| 1383 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | |
| 1384 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | |
| 1385 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | |
| 1386 | F(PAT) | F(PSE36) | 0 /* Reserved */ | |
| 1387 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | |
| 1388 | F(FXSR) | F(FXSR_OPT) | 0 /* GBPAGES */ | 0 /* RDTSCP */ | |
| 1389 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); |
| 1390 | /* cpuid 1.ecx */ |
| 1391 | const u32 kvm_supported_word4_x86_features = |
Avi Kivity | d149c73 | 2009-05-10 14:41:56 +0300 | [diff] [blame] | 1392 | F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ | |
| 1393 | 0 /* DS-CPL, VMX, SMX, EST */ | |
| 1394 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | |
| 1395 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | |
| 1396 | 0 /* Reserved, DCA */ | F(XMM4_1) | |
| 1397 | F(XMM4_2) | 0 /* x2APIC */ | F(MOVBE) | F(POPCNT) | |
| 1398 | 0 /* Reserved, XSAVE, OSXSAVE */; |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1399 | /* cpuid 0x80000001.ecx */ |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1400 | const u32 kvm_supported_word6_x86_features = |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1401 | F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ | |
| 1402 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | |
| 1403 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) | |
| 1404 | 0 /* SKINIT */ | 0 /* WDT */; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1405 | |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1406 | /* all calls to cpuid_count() should be made on the same cpu */ |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1407 | get_cpu(); |
| 1408 | do_cpuid_1_ent(entry, function, index); |
| 1409 | ++*nent; |
| 1410 | |
| 1411 | switch (function) { |
| 1412 | case 0: |
| 1413 | entry->eax = min(entry->eax, (u32)0xb); |
| 1414 | break; |
| 1415 | case 1: |
| 1416 | entry->edx &= kvm_supported_word0_x86_features; |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1417 | entry->ecx &= kvm_supported_word4_x86_features; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1418 | break; |
| 1419 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands |
| 1420 | * may return different values. This forces us to get_cpu() before |
| 1421 | * issuing the first command, and also to emulate this annoying behavior |
| 1422 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ |
| 1423 | case 2: { |
| 1424 | int t, times = entry->eax & 0xff; |
| 1425 | |
| 1426 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; |
Nitin A Kamble | 0fdf8e5 | 2008-11-05 15:56:21 -0800 | [diff] [blame] | 1427 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1428 | for (t = 1; t < times && *nent < maxnent; ++t) { |
| 1429 | do_cpuid_1_ent(&entry[t], function, 0); |
| 1430 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; |
| 1431 | ++*nent; |
| 1432 | } |
| 1433 | break; |
| 1434 | } |
| 1435 | /* function 4 and 0xb have additional index. */ |
| 1436 | case 4: { |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1437 | int i, cache_type; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1438 | |
| 1439 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
| 1440 | /* read more entries until cache_type is zero */ |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1441 | for (i = 1; *nent < maxnent; ++i) { |
| 1442 | cache_type = entry[i - 1].eax & 0x1f; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1443 | if (!cache_type) |
| 1444 | break; |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1445 | do_cpuid_1_ent(&entry[i], function, i); |
| 1446 | entry[i].flags |= |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1447 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
| 1448 | ++*nent; |
| 1449 | } |
| 1450 | break; |
| 1451 | } |
| 1452 | case 0xb: { |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1453 | int i, level_type; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1454 | |
| 1455 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
| 1456 | /* read more entries until level_type is zero */ |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1457 | for (i = 1; *nent < maxnent; ++i) { |
Nitin A Kamble | 0853d2c | 2008-11-05 15:37:36 -0800 | [diff] [blame] | 1458 | level_type = entry[i - 1].ecx & 0xff00; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1459 | if (!level_type) |
| 1460 | break; |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 1461 | do_cpuid_1_ent(&entry[i], function, i); |
| 1462 | entry[i].flags |= |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1463 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
| 1464 | ++*nent; |
| 1465 | } |
| 1466 | break; |
| 1467 | } |
| 1468 | case 0x80000000: |
| 1469 | entry->eax = min(entry->eax, 0x8000001a); |
| 1470 | break; |
| 1471 | case 0x80000001: |
| 1472 | entry->edx &= kvm_supported_word1_x86_features; |
| 1473 | entry->ecx &= kvm_supported_word6_x86_features; |
| 1474 | break; |
| 1475 | } |
| 1476 | put_cpu(); |
| 1477 | } |
| 1478 | |
Avi Kivity | 7faa4ee | 2009-05-10 13:55:35 +0300 | [diff] [blame] | 1479 | #undef F |
| 1480 | |
Avi Kivity | 674eea0 | 2008-02-11 18:37:23 +0200 | [diff] [blame] | 1481 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1482 | struct kvm_cpuid_entry2 __user *entries) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1483 | { |
| 1484 | struct kvm_cpuid_entry2 *cpuid_entries; |
| 1485 | int limit, nent = 0, r = -E2BIG; |
| 1486 | u32 func; |
| 1487 | |
| 1488 | if (cpuid->nent < 1) |
| 1489 | goto out; |
| 1490 | r = -ENOMEM; |
| 1491 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); |
| 1492 | if (!cpuid_entries) |
| 1493 | goto out; |
| 1494 | |
| 1495 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); |
| 1496 | limit = cpuid_entries[0].eax; |
| 1497 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) |
| 1498 | do_cpuid_ent(&cpuid_entries[nent], func, 0, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1499 | &nent, cpuid->nent); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1500 | r = -E2BIG; |
| 1501 | if (nent >= cpuid->nent) |
| 1502 | goto out_free; |
| 1503 | |
| 1504 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); |
| 1505 | limit = cpuid_entries[nent - 1].eax; |
| 1506 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) |
| 1507 | do_cpuid_ent(&cpuid_entries[nent], func, 0, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1508 | &nent, cpuid->nent); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1509 | r = -EFAULT; |
| 1510 | if (copy_to_user(entries, cpuid_entries, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1511 | nent * sizeof(struct kvm_cpuid_entry2))) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1512 | goto out_free; |
| 1513 | cpuid->nent = nent; |
| 1514 | r = 0; |
| 1515 | |
| 1516 | out_free: |
| 1517 | vfree(cpuid_entries); |
| 1518 | out: |
| 1519 | return r; |
| 1520 | } |
| 1521 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1522 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
| 1523 | struct kvm_lapic_state *s) |
| 1524 | { |
| 1525 | vcpu_load(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1526 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1527 | vcpu_put(vcpu); |
| 1528 | |
| 1529 | return 0; |
| 1530 | } |
| 1531 | |
| 1532 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, |
| 1533 | struct kvm_lapic_state *s) |
| 1534 | { |
| 1535 | vcpu_load(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1536 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1537 | kvm_apic_post_state_restore(vcpu); |
| 1538 | vcpu_put(vcpu); |
| 1539 | |
| 1540 | return 0; |
| 1541 | } |
| 1542 | |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 1543 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
| 1544 | struct kvm_interrupt *irq) |
| 1545 | { |
| 1546 | if (irq->irq < 0 || irq->irq >= 256) |
| 1547 | return -EINVAL; |
| 1548 | if (irqchip_in_kernel(vcpu->kvm)) |
| 1549 | return -ENXIO; |
| 1550 | vcpu_load(vcpu); |
| 1551 | |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 1552 | kvm_queue_interrupt(vcpu, irq->irq, false); |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 1553 | |
| 1554 | vcpu_put(vcpu); |
| 1555 | |
| 1556 | return 0; |
| 1557 | } |
| 1558 | |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 1559 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
| 1560 | { |
| 1561 | vcpu_load(vcpu); |
| 1562 | kvm_inject_nmi(vcpu); |
| 1563 | vcpu_put(vcpu); |
| 1564 | |
| 1565 | return 0; |
| 1566 | } |
| 1567 | |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1568 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
| 1569 | struct kvm_tpr_access_ctl *tac) |
| 1570 | { |
| 1571 | if (tac->flags) |
| 1572 | return -EINVAL; |
| 1573 | vcpu->arch.tpr_access_reporting = !!tac->enabled; |
| 1574 | return 0; |
| 1575 | } |
| 1576 | |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame^] | 1577 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
| 1578 | u64 mcg_cap) |
| 1579 | { |
| 1580 | int r; |
| 1581 | unsigned bank_num = mcg_cap & 0xff, bank; |
| 1582 | |
| 1583 | r = -EINVAL; |
| 1584 | if (!bank_num) |
| 1585 | goto out; |
| 1586 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) |
| 1587 | goto out; |
| 1588 | r = 0; |
| 1589 | vcpu->arch.mcg_cap = mcg_cap; |
| 1590 | /* Init IA32_MCG_CTL to all 1s */ |
| 1591 | if (mcg_cap & MCG_CTL_P) |
| 1592 | vcpu->arch.mcg_ctl = ~(u64)0; |
| 1593 | /* Init IA32_MCi_CTL to all 1s */ |
| 1594 | for (bank = 0; bank < bank_num; bank++) |
| 1595 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; |
| 1596 | out: |
| 1597 | return r; |
| 1598 | } |
| 1599 | |
| 1600 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, |
| 1601 | struct kvm_x86_mce *mce) |
| 1602 | { |
| 1603 | u64 mcg_cap = vcpu->arch.mcg_cap; |
| 1604 | unsigned bank_num = mcg_cap & 0xff; |
| 1605 | u64 *banks = vcpu->arch.mce_banks; |
| 1606 | |
| 1607 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) |
| 1608 | return -EINVAL; |
| 1609 | /* |
| 1610 | * if IA32_MCG_CTL is not all 1s, the uncorrected error |
| 1611 | * reporting is disabled |
| 1612 | */ |
| 1613 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && |
| 1614 | vcpu->arch.mcg_ctl != ~(u64)0) |
| 1615 | return 0; |
| 1616 | banks += 4 * mce->bank; |
| 1617 | /* |
| 1618 | * if IA32_MCi_CTL is not all 1s, the uncorrected error |
| 1619 | * reporting is disabled for the bank |
| 1620 | */ |
| 1621 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) |
| 1622 | return 0; |
| 1623 | if (mce->status & MCI_STATUS_UC) { |
| 1624 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || |
| 1625 | !(vcpu->arch.cr4 & X86_CR4_MCE)) { |
| 1626 | printk(KERN_DEBUG "kvm: set_mce: " |
| 1627 | "injects mce exception while " |
| 1628 | "previous one is in progress!\n"); |
| 1629 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); |
| 1630 | return 0; |
| 1631 | } |
| 1632 | if (banks[1] & MCI_STATUS_VAL) |
| 1633 | mce->status |= MCI_STATUS_OVER; |
| 1634 | banks[2] = mce->addr; |
| 1635 | banks[3] = mce->misc; |
| 1636 | vcpu->arch.mcg_status = mce->mcg_status; |
| 1637 | banks[1] = mce->status; |
| 1638 | kvm_queue_exception(vcpu, MC_VECTOR); |
| 1639 | } else if (!(banks[1] & MCI_STATUS_VAL) |
| 1640 | || !(banks[1] & MCI_STATUS_UC)) { |
| 1641 | if (banks[1] & MCI_STATUS_VAL) |
| 1642 | mce->status |= MCI_STATUS_OVER; |
| 1643 | banks[2] = mce->addr; |
| 1644 | banks[3] = mce->misc; |
| 1645 | banks[1] = mce->status; |
| 1646 | } else |
| 1647 | banks[1] |= MCI_STATUS_OVER; |
| 1648 | return 0; |
| 1649 | } |
| 1650 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1651 | long kvm_arch_vcpu_ioctl(struct file *filp, |
| 1652 | unsigned int ioctl, unsigned long arg) |
| 1653 | { |
| 1654 | struct kvm_vcpu *vcpu = filp->private_data; |
| 1655 | void __user *argp = (void __user *)arg; |
| 1656 | int r; |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1657 | struct kvm_lapic_state *lapic = NULL; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1658 | |
| 1659 | switch (ioctl) { |
| 1660 | case KVM_GET_LAPIC: { |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1661 | lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1662 | |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1663 | r = -ENOMEM; |
| 1664 | if (!lapic) |
| 1665 | goto out; |
| 1666 | r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1667 | if (r) |
| 1668 | goto out; |
| 1669 | r = -EFAULT; |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1670 | if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state))) |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1671 | goto out; |
| 1672 | r = 0; |
| 1673 | break; |
| 1674 | } |
| 1675 | case KVM_SET_LAPIC: { |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1676 | lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
| 1677 | r = -ENOMEM; |
| 1678 | if (!lapic) |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1679 | goto out; |
Dave Hansen | b772ff3 | 2008-08-11 10:01:47 -0700 | [diff] [blame] | 1680 | r = -EFAULT; |
| 1681 | if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state))) |
| 1682 | goto out; |
| 1683 | r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1684 | if (r) |
| 1685 | goto out; |
| 1686 | r = 0; |
| 1687 | break; |
| 1688 | } |
Zhang Xiantao | f77bc6a | 2007-11-21 04:36:41 +0800 | [diff] [blame] | 1689 | case KVM_INTERRUPT: { |
| 1690 | struct kvm_interrupt irq; |
| 1691 | |
| 1692 | r = -EFAULT; |
| 1693 | if (copy_from_user(&irq, argp, sizeof irq)) |
| 1694 | goto out; |
| 1695 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
| 1696 | if (r) |
| 1697 | goto out; |
| 1698 | r = 0; |
| 1699 | break; |
| 1700 | } |
Jan Kiszka | c4abb7c | 2008-09-26 09:30:55 +0200 | [diff] [blame] | 1701 | case KVM_NMI: { |
| 1702 | r = kvm_vcpu_ioctl_nmi(vcpu); |
| 1703 | if (r) |
| 1704 | goto out; |
| 1705 | r = 0; |
| 1706 | break; |
| 1707 | } |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1708 | case KVM_SET_CPUID: { |
| 1709 | struct kvm_cpuid __user *cpuid_arg = argp; |
| 1710 | struct kvm_cpuid cpuid; |
| 1711 | |
| 1712 | r = -EFAULT; |
| 1713 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 1714 | goto out; |
| 1715 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); |
| 1716 | if (r) |
| 1717 | goto out; |
| 1718 | break; |
| 1719 | } |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1720 | case KVM_SET_CPUID2: { |
| 1721 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
| 1722 | struct kvm_cpuid2 cpuid; |
| 1723 | |
| 1724 | r = -EFAULT; |
| 1725 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 1726 | goto out; |
| 1727 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1728 | cpuid_arg->entries); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1729 | if (r) |
| 1730 | goto out; |
| 1731 | break; |
| 1732 | } |
| 1733 | case KVM_GET_CPUID2: { |
| 1734 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
| 1735 | struct kvm_cpuid2 cpuid; |
| 1736 | |
| 1737 | r = -EFAULT; |
| 1738 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) |
| 1739 | goto out; |
| 1740 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 1741 | cpuid_arg->entries); |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 1742 | if (r) |
| 1743 | goto out; |
| 1744 | r = -EFAULT; |
| 1745 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) |
| 1746 | goto out; |
| 1747 | r = 0; |
| 1748 | break; |
| 1749 | } |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1750 | case KVM_GET_MSRS: |
| 1751 | r = msr_io(vcpu, argp, kvm_get_msr, 1); |
| 1752 | break; |
| 1753 | case KVM_SET_MSRS: |
| 1754 | r = msr_io(vcpu, argp, do_set_msr, 0); |
| 1755 | break; |
Avi Kivity | b209749f | 2007-10-22 16:50:39 +0200 | [diff] [blame] | 1756 | case KVM_TPR_ACCESS_REPORTING: { |
| 1757 | struct kvm_tpr_access_ctl tac; |
| 1758 | |
| 1759 | r = -EFAULT; |
| 1760 | if (copy_from_user(&tac, argp, sizeof tac)) |
| 1761 | goto out; |
| 1762 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); |
| 1763 | if (r) |
| 1764 | goto out; |
| 1765 | r = -EFAULT; |
| 1766 | if (copy_to_user(argp, &tac, sizeof tac)) |
| 1767 | goto out; |
| 1768 | r = 0; |
| 1769 | break; |
| 1770 | }; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 1771 | case KVM_SET_VAPIC_ADDR: { |
| 1772 | struct kvm_vapic_addr va; |
| 1773 | |
| 1774 | r = -EINVAL; |
| 1775 | if (!irqchip_in_kernel(vcpu->kvm)) |
| 1776 | goto out; |
| 1777 | r = -EFAULT; |
| 1778 | if (copy_from_user(&va, argp, sizeof va)) |
| 1779 | goto out; |
| 1780 | r = 0; |
| 1781 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
| 1782 | break; |
| 1783 | } |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame^] | 1784 | case KVM_X86_SETUP_MCE: { |
| 1785 | u64 mcg_cap; |
| 1786 | |
| 1787 | r = -EFAULT; |
| 1788 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) |
| 1789 | goto out; |
| 1790 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); |
| 1791 | break; |
| 1792 | } |
| 1793 | case KVM_X86_SET_MCE: { |
| 1794 | struct kvm_x86_mce mce; |
| 1795 | |
| 1796 | r = -EFAULT; |
| 1797 | if (copy_from_user(&mce, argp, sizeof mce)) |
| 1798 | goto out; |
| 1799 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); |
| 1800 | break; |
| 1801 | } |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1802 | default: |
| 1803 | r = -EINVAL; |
| 1804 | } |
| 1805 | out: |
Wei Yongjun | 7a6ce84 | 2009-03-31 16:47:44 +0800 | [diff] [blame] | 1806 | kfree(lapic); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1807 | return r; |
| 1808 | } |
| 1809 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1810 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
| 1811 | { |
| 1812 | int ret; |
| 1813 | |
| 1814 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) |
| 1815 | return -1; |
| 1816 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
| 1817 | return ret; |
| 1818 | } |
| 1819 | |
| 1820 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
| 1821 | u32 kvm_nr_mmu_pages) |
| 1822 | { |
| 1823 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) |
| 1824 | return -EINVAL; |
| 1825 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1826 | down_write(&kvm->slots_lock); |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 1827 | spin_lock(&kvm->mmu_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1828 | |
| 1829 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); |
Zhang Xiantao | f05e70a | 2007-12-14 10:01:48 +0800 | [diff] [blame] | 1830 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1831 | |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 1832 | spin_unlock(&kvm->mmu_lock); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1833 | up_write(&kvm->slots_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1834 | return 0; |
| 1835 | } |
| 1836 | |
| 1837 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) |
| 1838 | { |
Zhang Xiantao | f05e70a | 2007-12-14 10:01:48 +0800 | [diff] [blame] | 1839 | return kvm->arch.n_alloc_mmu_pages; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1840 | } |
| 1841 | |
Zhang Xiantao | e9f85cd | 2007-11-22 11:20:33 +0800 | [diff] [blame] | 1842 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
| 1843 | { |
| 1844 | int i; |
| 1845 | struct kvm_mem_alias *alias; |
| 1846 | |
Zhang Xiantao | d69fb81 | 2007-12-14 09:54:20 +0800 | [diff] [blame] | 1847 | for (i = 0; i < kvm->arch.naliases; ++i) { |
| 1848 | alias = &kvm->arch.aliases[i]; |
Zhang Xiantao | e9f85cd | 2007-11-22 11:20:33 +0800 | [diff] [blame] | 1849 | if (gfn >= alias->base_gfn |
| 1850 | && gfn < alias->base_gfn + alias->npages) |
| 1851 | return alias->target_gfn + gfn - alias->base_gfn; |
| 1852 | } |
| 1853 | return gfn; |
| 1854 | } |
| 1855 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1856 | /* |
| 1857 | * Set a new alias region. Aliases map a portion of physical memory into |
| 1858 | * another portion. This is useful for memory windows, for example the PC |
| 1859 | * VGA region. |
| 1860 | */ |
| 1861 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, |
| 1862 | struct kvm_memory_alias *alias) |
| 1863 | { |
| 1864 | int r, n; |
| 1865 | struct kvm_mem_alias *p; |
| 1866 | |
| 1867 | r = -EINVAL; |
| 1868 | /* General sanity checks */ |
| 1869 | if (alias->memory_size & (PAGE_SIZE - 1)) |
| 1870 | goto out; |
| 1871 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) |
| 1872 | goto out; |
| 1873 | if (alias->slot >= KVM_ALIAS_SLOTS) |
| 1874 | goto out; |
| 1875 | if (alias->guest_phys_addr + alias->memory_size |
| 1876 | < alias->guest_phys_addr) |
| 1877 | goto out; |
| 1878 | if (alias->target_phys_addr + alias->memory_size |
| 1879 | < alias->target_phys_addr) |
| 1880 | goto out; |
| 1881 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1882 | down_write(&kvm->slots_lock); |
Andrea Arcangeli | a1708ce | 2008-07-25 16:26:39 +0200 | [diff] [blame] | 1883 | spin_lock(&kvm->mmu_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1884 | |
Zhang Xiantao | d69fb81 | 2007-12-14 09:54:20 +0800 | [diff] [blame] | 1885 | p = &kvm->arch.aliases[alias->slot]; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1886 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
| 1887 | p->npages = alias->memory_size >> PAGE_SHIFT; |
| 1888 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; |
| 1889 | |
| 1890 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) |
Zhang Xiantao | d69fb81 | 2007-12-14 09:54:20 +0800 | [diff] [blame] | 1891 | if (kvm->arch.aliases[n - 1].npages) |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1892 | break; |
Zhang Xiantao | d69fb81 | 2007-12-14 09:54:20 +0800 | [diff] [blame] | 1893 | kvm->arch.naliases = n; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1894 | |
Andrea Arcangeli | a1708ce | 2008-07-25 16:26:39 +0200 | [diff] [blame] | 1895 | spin_unlock(&kvm->mmu_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1896 | kvm_mmu_zap_all(kvm); |
| 1897 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1898 | up_write(&kvm->slots_lock); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1899 | |
| 1900 | return 0; |
| 1901 | |
| 1902 | out: |
| 1903 | return r; |
| 1904 | } |
| 1905 | |
| 1906 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
| 1907 | { |
| 1908 | int r; |
| 1909 | |
| 1910 | r = 0; |
| 1911 | switch (chip->chip_id) { |
| 1912 | case KVM_IRQCHIP_PIC_MASTER: |
| 1913 | memcpy(&chip->chip.pic, |
| 1914 | &pic_irqchip(kvm)->pics[0], |
| 1915 | sizeof(struct kvm_pic_state)); |
| 1916 | break; |
| 1917 | case KVM_IRQCHIP_PIC_SLAVE: |
| 1918 | memcpy(&chip->chip.pic, |
| 1919 | &pic_irqchip(kvm)->pics[1], |
| 1920 | sizeof(struct kvm_pic_state)); |
| 1921 | break; |
| 1922 | case KVM_IRQCHIP_IOAPIC: |
| 1923 | memcpy(&chip->chip.ioapic, |
| 1924 | ioapic_irqchip(kvm), |
| 1925 | sizeof(struct kvm_ioapic_state)); |
| 1926 | break; |
| 1927 | default: |
| 1928 | r = -EINVAL; |
| 1929 | break; |
| 1930 | } |
| 1931 | return r; |
| 1932 | } |
| 1933 | |
| 1934 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
| 1935 | { |
| 1936 | int r; |
| 1937 | |
| 1938 | r = 0; |
| 1939 | switch (chip->chip_id) { |
| 1940 | case KVM_IRQCHIP_PIC_MASTER: |
| 1941 | memcpy(&pic_irqchip(kvm)->pics[0], |
| 1942 | &chip->chip.pic, |
| 1943 | sizeof(struct kvm_pic_state)); |
| 1944 | break; |
| 1945 | case KVM_IRQCHIP_PIC_SLAVE: |
| 1946 | memcpy(&pic_irqchip(kvm)->pics[1], |
| 1947 | &chip->chip.pic, |
| 1948 | sizeof(struct kvm_pic_state)); |
| 1949 | break; |
| 1950 | case KVM_IRQCHIP_IOAPIC: |
| 1951 | memcpy(ioapic_irqchip(kvm), |
| 1952 | &chip->chip.ioapic, |
| 1953 | sizeof(struct kvm_ioapic_state)); |
| 1954 | break; |
| 1955 | default: |
| 1956 | r = -EINVAL; |
| 1957 | break; |
| 1958 | } |
| 1959 | kvm_pic_update_irq(pic_irqchip(kvm)); |
| 1960 | return r; |
| 1961 | } |
| 1962 | |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 1963 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
| 1964 | { |
| 1965 | int r = 0; |
| 1966 | |
| 1967 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
| 1968 | return r; |
| 1969 | } |
| 1970 | |
| 1971 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
| 1972 | { |
| 1973 | int r = 0; |
| 1974 | |
| 1975 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
| 1976 | kvm_pit_load_count(kvm, 0, ps->channels[0].count); |
| 1977 | return r; |
| 1978 | } |
| 1979 | |
Marcelo Tosatti | 52d939a | 2008-12-30 15:55:06 -0200 | [diff] [blame] | 1980 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
| 1981 | struct kvm_reinject_control *control) |
| 1982 | { |
| 1983 | if (!kvm->arch.vpit) |
| 1984 | return -ENXIO; |
| 1985 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
| 1986 | return 0; |
| 1987 | } |
| 1988 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 1989 | /* |
| 1990 | * Get (and clear) the dirty memory log for a memory slot. |
| 1991 | */ |
| 1992 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
| 1993 | struct kvm_dirty_log *log) |
| 1994 | { |
| 1995 | int r; |
| 1996 | int n; |
| 1997 | struct kvm_memory_slot *memslot; |
| 1998 | int is_dirty = 0; |
| 1999 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 2000 | down_write(&kvm->slots_lock); |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 2001 | |
| 2002 | r = kvm_get_dirty_log(kvm, log, &is_dirty); |
| 2003 | if (r) |
| 2004 | goto out; |
| 2005 | |
| 2006 | /* If nothing is dirty, don't bother messing with page tables. */ |
| 2007 | if (is_dirty) { |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 2008 | spin_lock(&kvm->mmu_lock); |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 2009 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 2010 | spin_unlock(&kvm->mmu_lock); |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 2011 | kvm_flush_remote_tlbs(kvm); |
| 2012 | memslot = &kvm->memslots[log->slot]; |
| 2013 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
| 2014 | memset(memslot->dirty_bitmap, 0, n); |
| 2015 | } |
| 2016 | r = 0; |
| 2017 | out: |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 2018 | up_write(&kvm->slots_lock); |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 2019 | return r; |
| 2020 | } |
| 2021 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2022 | long kvm_arch_vm_ioctl(struct file *filp, |
| 2023 | unsigned int ioctl, unsigned long arg) |
| 2024 | { |
| 2025 | struct kvm *kvm = filp->private_data; |
| 2026 | void __user *argp = (void __user *)arg; |
| 2027 | int r = -EINVAL; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2028 | /* |
| 2029 | * This union makes it completely explicit to gcc-3.x |
| 2030 | * that these two variables' stack usage should be |
| 2031 | * combined, not added together. |
| 2032 | */ |
| 2033 | union { |
| 2034 | struct kvm_pit_state ps; |
| 2035 | struct kvm_memory_alias alias; |
| 2036 | } u; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2037 | |
| 2038 | switch (ioctl) { |
| 2039 | case KVM_SET_TSS_ADDR: |
| 2040 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); |
| 2041 | if (r < 0) |
| 2042 | goto out; |
| 2043 | break; |
| 2044 | case KVM_SET_MEMORY_REGION: { |
| 2045 | struct kvm_memory_region kvm_mem; |
| 2046 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 2047 | |
| 2048 | r = -EFAULT; |
| 2049 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) |
| 2050 | goto out; |
| 2051 | kvm_userspace_mem.slot = kvm_mem.slot; |
| 2052 | kvm_userspace_mem.flags = kvm_mem.flags; |
| 2053 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; |
| 2054 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; |
| 2055 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); |
| 2056 | if (r) |
| 2057 | goto out; |
| 2058 | break; |
| 2059 | } |
| 2060 | case KVM_SET_NR_MMU_PAGES: |
| 2061 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); |
| 2062 | if (r) |
| 2063 | goto out; |
| 2064 | break; |
| 2065 | case KVM_GET_NR_MMU_PAGES: |
| 2066 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); |
| 2067 | break; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2068 | case KVM_SET_MEMORY_ALIAS: |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2069 | r = -EFAULT; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2070 | if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias))) |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2071 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2072 | r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2073 | if (r) |
| 2074 | goto out; |
| 2075 | break; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2076 | case KVM_CREATE_IRQCHIP: |
| 2077 | r = -ENOMEM; |
Zhang Xiantao | d7deeeb0 | 2007-12-14 10:17:34 +0800 | [diff] [blame] | 2078 | kvm->arch.vpic = kvm_create_pic(kvm); |
| 2079 | if (kvm->arch.vpic) { |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2080 | r = kvm_ioapic_init(kvm); |
| 2081 | if (r) { |
Zhang Xiantao | d7deeeb0 | 2007-12-14 10:17:34 +0800 | [diff] [blame] | 2082 | kfree(kvm->arch.vpic); |
| 2083 | kvm->arch.vpic = NULL; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2084 | goto out; |
| 2085 | } |
| 2086 | } else |
| 2087 | goto out; |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 2088 | r = kvm_setup_default_irq_routing(kvm); |
| 2089 | if (r) { |
| 2090 | kfree(kvm->arch.vpic); |
| 2091 | kfree(kvm->arch.vioapic); |
| 2092 | goto out; |
| 2093 | } |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2094 | break; |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 2095 | case KVM_CREATE_PIT: |
Avi Kivity | 269e05e | 2009-01-05 15:21:42 +0200 | [diff] [blame] | 2096 | mutex_lock(&kvm->lock); |
| 2097 | r = -EEXIST; |
| 2098 | if (kvm->arch.vpit) |
| 2099 | goto create_pit_unlock; |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 2100 | r = -ENOMEM; |
| 2101 | kvm->arch.vpit = kvm_create_pit(kvm); |
| 2102 | if (kvm->arch.vpit) |
| 2103 | r = 0; |
Avi Kivity | 269e05e | 2009-01-05 15:21:42 +0200 | [diff] [blame] | 2104 | create_pit_unlock: |
| 2105 | mutex_unlock(&kvm->lock); |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 2106 | break; |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 2107 | case KVM_IRQ_LINE_STATUS: |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2108 | case KVM_IRQ_LINE: { |
| 2109 | struct kvm_irq_level irq_event; |
| 2110 | |
| 2111 | r = -EFAULT; |
| 2112 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) |
| 2113 | goto out; |
| 2114 | if (irqchip_in_kernel(kvm)) { |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 2115 | __s32 status; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2116 | mutex_lock(&kvm->lock); |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 2117 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
| 2118 | irq_event.irq, irq_event.level); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2119 | mutex_unlock(&kvm->lock); |
Gleb Natapov | 4925663 | 2009-02-04 17:28:14 +0200 | [diff] [blame] | 2120 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
| 2121 | irq_event.status = status; |
| 2122 | if (copy_to_user(argp, &irq_event, |
| 2123 | sizeof irq_event)) |
| 2124 | goto out; |
| 2125 | } |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2126 | r = 0; |
| 2127 | } |
| 2128 | break; |
| 2129 | } |
| 2130 | case KVM_GET_IRQCHIP: { |
| 2131 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2132 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2133 | |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2134 | r = -ENOMEM; |
| 2135 | if (!chip) |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2136 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2137 | r = -EFAULT; |
| 2138 | if (copy_from_user(chip, argp, sizeof *chip)) |
| 2139 | goto get_irqchip_out; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2140 | r = -ENXIO; |
| 2141 | if (!irqchip_in_kernel(kvm)) |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2142 | goto get_irqchip_out; |
| 2143 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); |
| 2144 | if (r) |
| 2145 | goto get_irqchip_out; |
| 2146 | r = -EFAULT; |
| 2147 | if (copy_to_user(argp, chip, sizeof *chip)) |
| 2148 | goto get_irqchip_out; |
| 2149 | r = 0; |
| 2150 | get_irqchip_out: |
| 2151 | kfree(chip); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2152 | if (r) |
| 2153 | goto out; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2154 | break; |
| 2155 | } |
| 2156 | case KVM_SET_IRQCHIP: { |
| 2157 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2158 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2159 | |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2160 | r = -ENOMEM; |
| 2161 | if (!chip) |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2162 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2163 | r = -EFAULT; |
| 2164 | if (copy_from_user(chip, argp, sizeof *chip)) |
| 2165 | goto set_irqchip_out; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2166 | r = -ENXIO; |
| 2167 | if (!irqchip_in_kernel(kvm)) |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2168 | goto set_irqchip_out; |
| 2169 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); |
| 2170 | if (r) |
| 2171 | goto set_irqchip_out; |
| 2172 | r = 0; |
| 2173 | set_irqchip_out: |
| 2174 | kfree(chip); |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2175 | if (r) |
| 2176 | goto out; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2177 | break; |
| 2178 | } |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2179 | case KVM_GET_PIT: { |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2180 | r = -EFAULT; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2181 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2182 | goto out; |
| 2183 | r = -ENXIO; |
| 2184 | if (!kvm->arch.vpit) |
| 2185 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2186 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2187 | if (r) |
| 2188 | goto out; |
| 2189 | r = -EFAULT; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2190 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2191 | goto out; |
| 2192 | r = 0; |
| 2193 | break; |
| 2194 | } |
| 2195 | case KVM_SET_PIT: { |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2196 | r = -EFAULT; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2197 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2198 | goto out; |
| 2199 | r = -ENXIO; |
| 2200 | if (!kvm->arch.vpit) |
| 2201 | goto out; |
Dave Hansen | f0d6627 | 2008-08-11 10:01:45 -0700 | [diff] [blame] | 2202 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
Sheng Yang | e0f63cb | 2008-03-04 00:50:59 +0800 | [diff] [blame] | 2203 | if (r) |
| 2204 | goto out; |
| 2205 | r = 0; |
| 2206 | break; |
| 2207 | } |
Marcelo Tosatti | 52d939a | 2008-12-30 15:55:06 -0200 | [diff] [blame] | 2208 | case KVM_REINJECT_CONTROL: { |
| 2209 | struct kvm_reinject_control control; |
| 2210 | r = -EFAULT; |
| 2211 | if (copy_from_user(&control, argp, sizeof(control))) |
| 2212 | goto out; |
| 2213 | r = kvm_vm_ioctl_reinject(kvm, &control); |
| 2214 | if (r) |
| 2215 | goto out; |
| 2216 | r = 0; |
| 2217 | break; |
| 2218 | } |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2219 | default: |
| 2220 | ; |
| 2221 | } |
| 2222 | out: |
| 2223 | return r; |
| 2224 | } |
| 2225 | |
Zhang Xiantao | a16b043 | 2007-11-16 14:38:21 +0800 | [diff] [blame] | 2226 | static void kvm_init_msr_list(void) |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2227 | { |
| 2228 | u32 dummy[2]; |
| 2229 | unsigned i, j; |
| 2230 | |
| 2231 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { |
| 2232 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
| 2233 | continue; |
| 2234 | if (j < i) |
| 2235 | msrs_to_save[j] = msrs_to_save[i]; |
| 2236 | j++; |
| 2237 | } |
| 2238 | num_msrs_to_save = j; |
| 2239 | } |
| 2240 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2241 | /* |
| 2242 | * Only apic need an MMIO device hook, so shortcut now.. |
| 2243 | */ |
| 2244 | 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] | 2245 | gpa_t addr, int len, |
| 2246 | int is_write) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2247 | { |
| 2248 | struct kvm_io_device *dev; |
| 2249 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2250 | if (vcpu->arch.apic) { |
| 2251 | dev = &vcpu->arch.apic->dev; |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2252 | if (dev->in_range(dev, addr, len, is_write)) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2253 | return dev; |
| 2254 | } |
| 2255 | return NULL; |
| 2256 | } |
| 2257 | |
| 2258 | |
| 2259 | 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] | 2260 | gpa_t addr, int len, |
| 2261 | int is_write) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2262 | { |
| 2263 | struct kvm_io_device *dev; |
| 2264 | |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2265 | dev = vcpu_find_pervcpu_dev(vcpu, addr, len, is_write); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2266 | if (dev == NULL) |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2267 | dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, |
| 2268 | is_write); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2269 | return dev; |
| 2270 | } |
| 2271 | |
Hannes Eder | cded19f | 2009-02-21 02:19:13 +0100 | [diff] [blame] | 2272 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, |
| 2273 | struct kvm_vcpu *vcpu) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2274 | { |
| 2275 | void *data = val; |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2276 | int r = X86EMUL_CONTINUE; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2277 | |
| 2278 | while (bytes) { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2279 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2280 | unsigned offset = addr & (PAGE_SIZE-1); |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2281 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2282 | int ret; |
| 2283 | |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2284 | if (gpa == UNMAPPED_GVA) { |
| 2285 | r = X86EMUL_PROPAGATE_FAULT; |
| 2286 | goto out; |
| 2287 | } |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2288 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2289 | if (ret < 0) { |
| 2290 | r = X86EMUL_UNHANDLEABLE; |
| 2291 | goto out; |
| 2292 | } |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2293 | |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2294 | bytes -= toread; |
| 2295 | data += toread; |
| 2296 | addr += toread; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2297 | } |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2298 | out: |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2299 | return r; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2300 | } |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2301 | |
Hannes Eder | cded19f | 2009-02-21 02:19:13 +0100 | [diff] [blame] | 2302 | static int kvm_write_guest_virt(gva_t addr, void *val, unsigned int bytes, |
| 2303 | struct kvm_vcpu *vcpu) |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2304 | { |
| 2305 | void *data = val; |
| 2306 | int r = X86EMUL_CONTINUE; |
| 2307 | |
| 2308 | while (bytes) { |
| 2309 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
| 2310 | unsigned offset = addr & (PAGE_SIZE-1); |
| 2311 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); |
| 2312 | int ret; |
| 2313 | |
| 2314 | if (gpa == UNMAPPED_GVA) { |
| 2315 | r = X86EMUL_PROPAGATE_FAULT; |
| 2316 | goto out; |
| 2317 | } |
| 2318 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); |
| 2319 | if (ret < 0) { |
| 2320 | r = X86EMUL_UNHANDLEABLE; |
| 2321 | goto out; |
| 2322 | } |
| 2323 | |
| 2324 | bytes -= towrite; |
| 2325 | data += towrite; |
| 2326 | addr += towrite; |
| 2327 | } |
| 2328 | out: |
| 2329 | return r; |
| 2330 | } |
| 2331 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2332 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2333 | static int emulator_read_emulated(unsigned long addr, |
| 2334 | void *val, |
| 2335 | unsigned int bytes, |
| 2336 | struct kvm_vcpu *vcpu) |
| 2337 | { |
| 2338 | struct kvm_io_device *mmio_dev; |
| 2339 | gpa_t gpa; |
| 2340 | |
| 2341 | if (vcpu->mmio_read_completed) { |
| 2342 | memcpy(val, vcpu->mmio_data, bytes); |
| 2343 | vcpu->mmio_read_completed = 0; |
| 2344 | return X86EMUL_CONTINUE; |
| 2345 | } |
| 2346 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2347 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2348 | |
| 2349 | /* For APIC access vmexit */ |
| 2350 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) |
| 2351 | goto mmio; |
| 2352 | |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2353 | if (kvm_read_guest_virt(addr, val, bytes, vcpu) |
| 2354 | == X86EMUL_CONTINUE) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2355 | return X86EMUL_CONTINUE; |
| 2356 | if (gpa == UNMAPPED_GVA) |
| 2357 | return X86EMUL_PROPAGATE_FAULT; |
| 2358 | |
| 2359 | mmio: |
| 2360 | /* |
| 2361 | * Is this MMIO handled locally? |
| 2362 | */ |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2363 | mutex_lock(&vcpu->kvm->lock); |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2364 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 0); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2365 | if (mmio_dev) { |
| 2366 | kvm_iodevice_read(mmio_dev, gpa, bytes, val); |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2367 | mutex_unlock(&vcpu->kvm->lock); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2368 | return X86EMUL_CONTINUE; |
| 2369 | } |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2370 | mutex_unlock(&vcpu->kvm->lock); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2371 | |
| 2372 | vcpu->mmio_needed = 1; |
| 2373 | vcpu->mmio_phys_addr = gpa; |
| 2374 | vcpu->mmio_size = bytes; |
| 2375 | vcpu->mmio_is_write = 0; |
| 2376 | |
| 2377 | return X86EMUL_UNHANDLEABLE; |
| 2378 | } |
| 2379 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 2380 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
Avi Kivity | 9f81128 | 2008-03-02 14:06:05 +0200 | [diff] [blame] | 2381 | const void *val, int bytes) |
| 2382 | { |
| 2383 | int ret; |
| 2384 | |
| 2385 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); |
| 2386 | if (ret < 0) |
| 2387 | return 0; |
Marcelo Tosatti | ad218f8 | 2008-12-01 22:32:05 -0200 | [diff] [blame] | 2388 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
Avi Kivity | 9f81128 | 2008-03-02 14:06:05 +0200 | [diff] [blame] | 2389 | return 1; |
| 2390 | } |
| 2391 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2392 | static int emulator_write_emulated_onepage(unsigned long addr, |
| 2393 | const void *val, |
| 2394 | unsigned int bytes, |
| 2395 | struct kvm_vcpu *vcpu) |
| 2396 | { |
| 2397 | struct kvm_io_device *mmio_dev; |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2398 | gpa_t gpa; |
| 2399 | |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2400 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2401 | |
| 2402 | if (gpa == UNMAPPED_GVA) { |
Avi Kivity | c3c91fe | 2007-11-25 14:04:58 +0200 | [diff] [blame] | 2403 | kvm_inject_page_fault(vcpu, addr, 2); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2404 | return X86EMUL_PROPAGATE_FAULT; |
| 2405 | } |
| 2406 | |
| 2407 | /* For APIC access vmexit */ |
| 2408 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) |
| 2409 | goto mmio; |
| 2410 | |
| 2411 | if (emulator_write_phys(vcpu, gpa, val, bytes)) |
| 2412 | return X86EMUL_CONTINUE; |
| 2413 | |
| 2414 | mmio: |
| 2415 | /* |
| 2416 | * Is this MMIO handled locally? |
| 2417 | */ |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2418 | mutex_lock(&vcpu->kvm->lock); |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2419 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 1); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2420 | if (mmio_dev) { |
| 2421 | kvm_iodevice_write(mmio_dev, gpa, bytes, val); |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2422 | mutex_unlock(&vcpu->kvm->lock); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2423 | return X86EMUL_CONTINUE; |
| 2424 | } |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2425 | mutex_unlock(&vcpu->kvm->lock); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2426 | |
| 2427 | vcpu->mmio_needed = 1; |
| 2428 | vcpu->mmio_phys_addr = gpa; |
| 2429 | vcpu->mmio_size = bytes; |
| 2430 | vcpu->mmio_is_write = 1; |
| 2431 | memcpy(vcpu->mmio_data, val, bytes); |
| 2432 | |
| 2433 | return X86EMUL_CONTINUE; |
| 2434 | } |
| 2435 | |
| 2436 | int emulator_write_emulated(unsigned long addr, |
| 2437 | const void *val, |
| 2438 | unsigned int bytes, |
| 2439 | struct kvm_vcpu *vcpu) |
| 2440 | { |
| 2441 | /* Crossing a page boundary? */ |
| 2442 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { |
| 2443 | int rc, now; |
| 2444 | |
| 2445 | now = -addr & ~PAGE_MASK; |
| 2446 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); |
| 2447 | if (rc != X86EMUL_CONTINUE) |
| 2448 | return rc; |
| 2449 | addr += now; |
| 2450 | val += now; |
| 2451 | bytes -= now; |
| 2452 | } |
| 2453 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); |
| 2454 | } |
| 2455 | EXPORT_SYMBOL_GPL(emulator_write_emulated); |
| 2456 | |
| 2457 | static int emulator_cmpxchg_emulated(unsigned long addr, |
| 2458 | const void *old, |
| 2459 | const void *new, |
| 2460 | unsigned int bytes, |
| 2461 | struct kvm_vcpu *vcpu) |
| 2462 | { |
| 2463 | static int reported; |
| 2464 | |
| 2465 | if (!reported) { |
| 2466 | reported = 1; |
| 2467 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); |
| 2468 | } |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2469 | #ifndef CONFIG_X86_64 |
| 2470 | /* guests cmpxchg8b have to be emulated atomically */ |
| 2471 | if (bytes == 8) { |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2472 | gpa_t gpa; |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2473 | struct page *page; |
Andrew Morton | c0b49b0 | 2008-02-04 22:27:18 -0800 | [diff] [blame] | 2474 | char *kaddr; |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2475 | u64 val; |
| 2476 | |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 2477 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
| 2478 | |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2479 | if (gpa == UNMAPPED_GVA || |
| 2480 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) |
| 2481 | goto emul_write; |
| 2482 | |
| 2483 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
| 2484 | goto emul_write; |
| 2485 | |
| 2486 | val = *(u64 *)new; |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 2487 | |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2488 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 2489 | |
Andrew Morton | c0b49b0 | 2008-02-04 22:27:18 -0800 | [diff] [blame] | 2490 | kaddr = kmap_atomic(page, KM_USER0); |
| 2491 | set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val); |
| 2492 | kunmap_atomic(kaddr, KM_USER0); |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2493 | kvm_release_page_dirty(page); |
| 2494 | } |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 2495 | emul_write: |
Marcelo Tosatti | 2bacc55 | 2007-12-12 10:46:12 -0500 | [diff] [blame] | 2496 | #endif |
| 2497 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2498 | return emulator_write_emulated(addr, new, bytes, vcpu); |
| 2499 | } |
| 2500 | |
| 2501 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
| 2502 | { |
| 2503 | return kvm_x86_ops->get_segment_base(vcpu, seg); |
| 2504 | } |
| 2505 | |
| 2506 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) |
| 2507 | { |
Marcelo Tosatti | a705289 | 2008-09-23 13:18:35 -0300 | [diff] [blame] | 2508 | kvm_mmu_invlpg(vcpu, address); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2509 | return X86EMUL_CONTINUE; |
| 2510 | } |
| 2511 | |
| 2512 | int emulate_clts(struct kvm_vcpu *vcpu) |
| 2513 | { |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 2514 | KVMTRACE_0D(CLTS, vcpu, handler); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2515 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2516 | return X86EMUL_CONTINUE; |
| 2517 | } |
| 2518 | |
| 2519 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) |
| 2520 | { |
| 2521 | struct kvm_vcpu *vcpu = ctxt->vcpu; |
| 2522 | |
| 2523 | switch (dr) { |
| 2524 | case 0 ... 3: |
| 2525 | *dest = kvm_x86_ops->get_dr(vcpu, dr); |
| 2526 | return X86EMUL_CONTINUE; |
| 2527 | default: |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 2528 | pr_unimpl(vcpu, "%s: unexpected dr %u\n", __func__, dr); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2529 | return X86EMUL_UNHANDLEABLE; |
| 2530 | } |
| 2531 | } |
| 2532 | |
| 2533 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) |
| 2534 | { |
| 2535 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; |
| 2536 | int exception; |
| 2537 | |
| 2538 | kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); |
| 2539 | if (exception) { |
| 2540 | /* FIXME: better handling */ |
| 2541 | return X86EMUL_UNHANDLEABLE; |
| 2542 | } |
| 2543 | return X86EMUL_CONTINUE; |
| 2544 | } |
| 2545 | |
| 2546 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) |
| 2547 | { |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2548 | u8 opcodes[4]; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2549 | unsigned long rip = kvm_rip_read(vcpu); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2550 | unsigned long rip_linear; |
| 2551 | |
Avi Kivity | f76c710 | 2008-06-13 22:45:42 +0300 | [diff] [blame] | 2552 | if (!printk_ratelimit()) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2553 | return; |
| 2554 | |
Glauber Costa | 25be460 | 2008-06-10 10:46:53 -0300 | [diff] [blame] | 2555 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); |
| 2556 | |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2557 | kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2558 | |
| 2559 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", |
| 2560 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2561 | } |
| 2562 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); |
| 2563 | |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 2564 | static struct x86_emulate_ops emulate_ops = { |
Izik Eidus | 77c2002 | 2008-12-29 01:42:19 +0200 | [diff] [blame] | 2565 | .read_std = kvm_read_guest_virt, |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2566 | .read_emulated = emulator_read_emulated, |
| 2567 | .write_emulated = emulator_write_emulated, |
| 2568 | .cmpxchg_emulated = emulator_cmpxchg_emulated, |
| 2569 | }; |
| 2570 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2571 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
| 2572 | { |
| 2573 | kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 2574 | kvm_register_read(vcpu, VCPU_REGS_RSP); |
| 2575 | kvm_register_read(vcpu, VCPU_REGS_RIP); |
| 2576 | vcpu->arch.regs_dirty = ~0; |
| 2577 | } |
| 2578 | |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2579 | int emulate_instruction(struct kvm_vcpu *vcpu, |
| 2580 | struct kvm_run *run, |
| 2581 | unsigned long cr2, |
| 2582 | u16 error_code, |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 2583 | int emulation_type) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2584 | { |
Glauber Costa | 310b5d3 | 2009-05-12 16:21:06 -0400 | [diff] [blame] | 2585 | int r, shadow_mask; |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 2586 | struct decode_cache *c; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2587 | |
Avi Kivity | 26eef70 | 2008-07-03 14:59:22 +0300 | [diff] [blame] | 2588 | kvm_clear_exception_queue(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2589 | vcpu->arch.mmio_fault_cr2 = cr2; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2590 | /* |
| 2591 | * TODO: fix x86_emulate.c to use guest_read/write_register |
| 2592 | * instead of direct ->regs accesses, can save hundred cycles |
| 2593 | * on Intel for instructions that don't read/change RSP, for |
| 2594 | * for example. |
| 2595 | */ |
| 2596 | cache_all_regs(vcpu); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2597 | |
| 2598 | vcpu->mmio_is_write = 0; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2599 | vcpu->arch.pio.string = 0; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2600 | |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 2601 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2602 | int cs_db, cs_l; |
| 2603 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
| 2604 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2605 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
| 2606 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); |
| 2607 | vcpu->arch.emulate_ctxt.mode = |
| 2608 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2609 | ? X86EMUL_MODE_REAL : cs_l |
| 2610 | ? X86EMUL_MODE_PROT64 : cs_db |
| 2611 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; |
| 2612 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2613 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 2614 | |
| 2615 | /* Reject the instructions other than VMCALL/VMMCALL when |
| 2616 | * try to emulate invalid opcode */ |
| 2617 | c = &vcpu->arch.emulate_ctxt.decode; |
| 2618 | if ((emulation_type & EMULTYPE_TRAP_UD) && |
| 2619 | (!(c->twobyte && c->b == 0x01 && |
| 2620 | (c->modrm_reg == 0 || c->modrm_reg == 3) && |
| 2621 | c->modrm_mod == 3 && c->modrm_rm == 1))) |
| 2622 | return EMULATE_FAIL; |
| 2623 | |
Avi Kivity | f2b5756 | 2007-11-18 15:17:51 +0200 | [diff] [blame] | 2624 | ++vcpu->stat.insn_emulation; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2625 | if (r) { |
Avi Kivity | f2b5756 | 2007-11-18 15:17:51 +0200 | [diff] [blame] | 2626 | ++vcpu->stat.insn_emulation_fail; |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2627 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
| 2628 | return EMULATE_DONE; |
| 2629 | return EMULATE_FAIL; |
| 2630 | } |
| 2631 | } |
| 2632 | |
Gleb Natapov | ba8afb6 | 2009-04-12 13:36:57 +0300 | [diff] [blame] | 2633 | if (emulation_type & EMULTYPE_SKIP) { |
| 2634 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip); |
| 2635 | return EMULATE_DONE; |
| 2636 | } |
| 2637 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2638 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
Glauber Costa | 310b5d3 | 2009-05-12 16:21:06 -0400 | [diff] [blame] | 2639 | shadow_mask = vcpu->arch.emulate_ctxt.interruptibility; |
| 2640 | |
| 2641 | if (r == 0) |
| 2642 | kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2643 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2644 | if (vcpu->arch.pio.string) |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2645 | return EMULATE_DO_MMIO; |
| 2646 | |
| 2647 | if ((r || vcpu->mmio_is_write) && run) { |
| 2648 | run->exit_reason = KVM_EXIT_MMIO; |
| 2649 | run->mmio.phys_addr = vcpu->mmio_phys_addr; |
| 2650 | memcpy(run->mmio.data, vcpu->mmio_data, 8); |
| 2651 | run->mmio.len = vcpu->mmio_size; |
| 2652 | run->mmio.is_write = vcpu->mmio_is_write; |
| 2653 | } |
| 2654 | |
| 2655 | if (r) { |
| 2656 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
| 2657 | return EMULATE_DONE; |
| 2658 | if (!vcpu->mmio_needed) { |
| 2659 | kvm_report_emulation_failure(vcpu, "mmio"); |
| 2660 | return EMULATE_FAIL; |
| 2661 | } |
| 2662 | return EMULATE_DO_MMIO; |
| 2663 | } |
| 2664 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2665 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
Carsten Otte | bbd9b64 | 2007-10-30 18:44:21 +0100 | [diff] [blame] | 2666 | |
| 2667 | if (vcpu->mmio_is_write) { |
| 2668 | vcpu->mmio_needed = 0; |
| 2669 | return EMULATE_DO_MMIO; |
| 2670 | } |
| 2671 | |
| 2672 | return EMULATE_DONE; |
| 2673 | } |
| 2674 | EXPORT_SYMBOL_GPL(emulate_instruction); |
| 2675 | |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2676 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
| 2677 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2678 | void *p = vcpu->arch.pio_data; |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2679 | gva_t q = vcpu->arch.pio.guest_gva; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2680 | unsigned bytes; |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2681 | int ret; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2682 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2683 | bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count; |
| 2684 | if (vcpu->arch.pio.in) |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2685 | ret = kvm_write_guest_virt(q, p, bytes, vcpu); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2686 | else |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2687 | ret = kvm_read_guest_virt(q, p, bytes, vcpu); |
| 2688 | return ret; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2689 | } |
| 2690 | |
| 2691 | int complete_pio(struct kvm_vcpu *vcpu) |
| 2692 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2693 | struct kvm_pio_request *io = &vcpu->arch.pio; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2694 | long delta; |
| 2695 | int r; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2696 | unsigned long val; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2697 | |
| 2698 | if (!io->string) { |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2699 | if (io->in) { |
| 2700 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 2701 | memcpy(&val, vcpu->arch.pio_data, io->size); |
| 2702 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); |
| 2703 | } |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2704 | } else { |
| 2705 | if (io->in) { |
| 2706 | r = pio_copy_data(vcpu); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2707 | if (r) |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2708 | return r; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2709 | } |
| 2710 | |
| 2711 | delta = 1; |
| 2712 | if (io->rep) { |
| 2713 | delta *= io->cur_count; |
| 2714 | /* |
| 2715 | * The size of the register should really depend on |
| 2716 | * current address size. |
| 2717 | */ |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2718 | val = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 2719 | val -= delta; |
| 2720 | kvm_register_write(vcpu, VCPU_REGS_RCX, val); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2721 | } |
| 2722 | if (io->down) |
| 2723 | delta = -delta; |
| 2724 | delta *= io->size; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2725 | if (io->in) { |
| 2726 | val = kvm_register_read(vcpu, VCPU_REGS_RDI); |
| 2727 | val += delta; |
| 2728 | kvm_register_write(vcpu, VCPU_REGS_RDI, val); |
| 2729 | } else { |
| 2730 | val = kvm_register_read(vcpu, VCPU_REGS_RSI); |
| 2731 | val += delta; |
| 2732 | kvm_register_write(vcpu, VCPU_REGS_RSI, val); |
| 2733 | } |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2734 | } |
| 2735 | |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2736 | io->count -= io->cur_count; |
| 2737 | io->cur_count = 0; |
| 2738 | |
| 2739 | return 0; |
| 2740 | } |
| 2741 | |
| 2742 | static void kernel_pio(struct kvm_io_device *pio_dev, |
| 2743 | struct kvm_vcpu *vcpu, |
| 2744 | void *pd) |
| 2745 | { |
| 2746 | /* TODO: String I/O for in kernel device */ |
| 2747 | |
| 2748 | mutex_lock(&vcpu->kvm->lock); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2749 | if (vcpu->arch.pio.in) |
| 2750 | kvm_iodevice_read(pio_dev, vcpu->arch.pio.port, |
| 2751 | vcpu->arch.pio.size, |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2752 | pd); |
| 2753 | else |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2754 | kvm_iodevice_write(pio_dev, vcpu->arch.pio.port, |
| 2755 | vcpu->arch.pio.size, |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2756 | pd); |
| 2757 | mutex_unlock(&vcpu->kvm->lock); |
| 2758 | } |
| 2759 | |
| 2760 | static void pio_string_write(struct kvm_io_device *pio_dev, |
| 2761 | struct kvm_vcpu *vcpu) |
| 2762 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2763 | struct kvm_pio_request *io = &vcpu->arch.pio; |
| 2764 | void *pd = vcpu->arch.pio_data; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2765 | int i; |
| 2766 | |
| 2767 | mutex_lock(&vcpu->kvm->lock); |
| 2768 | for (i = 0; i < io->cur_count; i++) { |
| 2769 | kvm_iodevice_write(pio_dev, io->port, |
| 2770 | io->size, |
| 2771 | pd); |
| 2772 | pd += io->size; |
| 2773 | } |
| 2774 | mutex_unlock(&vcpu->kvm->lock); |
| 2775 | } |
| 2776 | |
| 2777 | 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] | 2778 | gpa_t addr, int len, |
| 2779 | int is_write) |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2780 | { |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2781 | 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] | 2782 | } |
| 2783 | |
| 2784 | int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, |
| 2785 | int size, unsigned port) |
| 2786 | { |
| 2787 | struct kvm_io_device *pio_dev; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2788 | unsigned long val; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2789 | |
| 2790 | vcpu->run->exit_reason = KVM_EXIT_IO; |
| 2791 | 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] | 2792 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2793 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2794 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1; |
| 2795 | vcpu->run->io.port = vcpu->arch.pio.port = port; |
| 2796 | vcpu->arch.pio.in = in; |
| 2797 | vcpu->arch.pio.string = 0; |
| 2798 | vcpu->arch.pio.down = 0; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2799 | vcpu->arch.pio.rep = 0; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2800 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2801 | if (vcpu->run->io.direction == KVM_EXIT_IO_IN) |
| 2802 | KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size, |
| 2803 | handler); |
| 2804 | else |
| 2805 | KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size, |
| 2806 | handler); |
| 2807 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 2808 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 2809 | memcpy(vcpu->arch.pio_data, &val, 4); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2810 | |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2811 | pio_dev = vcpu_find_pio_dev(vcpu, port, size, !in); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2812 | if (pio_dev) { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2813 | kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2814 | complete_pio(vcpu); |
| 2815 | return 1; |
| 2816 | } |
| 2817 | return 0; |
| 2818 | } |
| 2819 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); |
| 2820 | |
| 2821 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, |
| 2822 | int size, unsigned long count, int down, |
| 2823 | gva_t address, int rep, unsigned port) |
| 2824 | { |
| 2825 | unsigned now, in_page; |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2826 | int ret = 0; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2827 | struct kvm_io_device *pio_dev; |
| 2828 | |
| 2829 | vcpu->run->exit_reason = KVM_EXIT_IO; |
| 2830 | 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] | 2831 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2832 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2833 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count; |
| 2834 | vcpu->run->io.port = vcpu->arch.pio.port = port; |
| 2835 | vcpu->arch.pio.in = in; |
| 2836 | vcpu->arch.pio.string = 1; |
| 2837 | vcpu->arch.pio.down = down; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2838 | vcpu->arch.pio.rep = rep; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2839 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2840 | if (vcpu->run->io.direction == KVM_EXIT_IO_IN) |
| 2841 | KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size, |
| 2842 | handler); |
| 2843 | else |
| 2844 | KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size, |
| 2845 | handler); |
| 2846 | |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2847 | if (!count) { |
| 2848 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
| 2849 | return 1; |
| 2850 | } |
| 2851 | |
| 2852 | if (!down) |
| 2853 | in_page = PAGE_SIZE - offset_in_page(address); |
| 2854 | else |
| 2855 | in_page = offset_in_page(address) + size; |
| 2856 | now = min(count, (unsigned long)in_page / size); |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2857 | if (!now) |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2858 | now = 1; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2859 | if (down) { |
| 2860 | /* |
| 2861 | * String I/O in reverse. Yuck. Kill the guest, fix later. |
| 2862 | */ |
| 2863 | pr_unimpl(vcpu, "guest string pio down\n"); |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 2864 | kvm_inject_gp(vcpu, 0); |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2865 | return 1; |
| 2866 | } |
| 2867 | vcpu->run->io.count = now; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2868 | vcpu->arch.pio.cur_count = now; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2869 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2870 | if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count) |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2871 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
| 2872 | |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2873 | vcpu->arch.pio.guest_gva = address; |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2874 | |
Laurent Vivier | 9276049 | 2008-05-30 16:05:53 +0200 | [diff] [blame] | 2875 | pio_dev = vcpu_find_pio_dev(vcpu, port, |
| 2876 | vcpu->arch.pio.cur_count, |
| 2877 | !vcpu->arch.pio.in); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2878 | if (!vcpu->arch.pio.in) { |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2879 | /* string PIO write */ |
| 2880 | ret = pio_copy_data(vcpu); |
Izik Eidus | 0f34607 | 2008-12-29 01:42:20 +0200 | [diff] [blame] | 2881 | if (ret == X86EMUL_PROPAGATE_FAULT) { |
| 2882 | kvm_inject_gp(vcpu, 0); |
| 2883 | return 1; |
| 2884 | } |
| 2885 | if (ret == 0 && pio_dev) { |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2886 | pio_string_write(pio_dev, vcpu); |
| 2887 | complete_pio(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2888 | if (vcpu->arch.pio.count == 0) |
Carsten Otte | de7d789 | 2007-10-30 18:44:25 +0100 | [diff] [blame] | 2889 | ret = 1; |
| 2890 | } |
| 2891 | } else if (pio_dev) |
| 2892 | pr_unimpl(vcpu, "no string pio read support yet, " |
| 2893 | "port %x size %d count %ld\n", |
| 2894 | port, size, count); |
| 2895 | |
| 2896 | return ret; |
| 2897 | } |
| 2898 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); |
| 2899 | |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 2900 | static void bounce_off(void *info) |
| 2901 | { |
| 2902 | /* nothing */ |
| 2903 | } |
| 2904 | |
| 2905 | static unsigned int ref_freq; |
| 2906 | static unsigned long tsc_khz_ref; |
| 2907 | |
| 2908 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
| 2909 | void *data) |
| 2910 | { |
| 2911 | struct cpufreq_freqs *freq = data; |
| 2912 | struct kvm *kvm; |
| 2913 | struct kvm_vcpu *vcpu; |
| 2914 | int i, send_ipi = 0; |
| 2915 | |
| 2916 | if (!ref_freq) |
| 2917 | ref_freq = freq->old; |
| 2918 | |
| 2919 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
| 2920 | return 0; |
| 2921 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) |
| 2922 | return 0; |
| 2923 | per_cpu(cpu_tsc_khz, freq->cpu) = cpufreq_scale(tsc_khz_ref, ref_freq, freq->new); |
| 2924 | |
| 2925 | spin_lock(&kvm_lock); |
| 2926 | list_for_each_entry(kvm, &vm_list, vm_list) { |
| 2927 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| 2928 | vcpu = kvm->vcpus[i]; |
| 2929 | if (!vcpu) |
| 2930 | continue; |
| 2931 | if (vcpu->cpu != freq->cpu) |
| 2932 | continue; |
| 2933 | if (!kvm_request_guest_time_update(vcpu)) |
| 2934 | continue; |
| 2935 | if (vcpu->cpu != smp_processor_id()) |
| 2936 | send_ipi++; |
| 2937 | } |
| 2938 | } |
| 2939 | spin_unlock(&kvm_lock); |
| 2940 | |
| 2941 | if (freq->old < freq->new && send_ipi) { |
| 2942 | /* |
| 2943 | * We upscale the frequency. Must make the guest |
| 2944 | * doesn't see old kvmclock values while running with |
| 2945 | * the new frequency, otherwise we risk the guest sees |
| 2946 | * time go backwards. |
| 2947 | * |
| 2948 | * In case we update the frequency for another cpu |
| 2949 | * (which might be in guest context) send an interrupt |
| 2950 | * to kick the cpu out of guest context. Next time |
| 2951 | * guest context is entered kvmclock will be updated, |
| 2952 | * so the guest will not see stale values. |
| 2953 | */ |
| 2954 | smp_call_function_single(freq->cpu, bounce_off, NULL, 1); |
| 2955 | } |
| 2956 | return 0; |
| 2957 | } |
| 2958 | |
| 2959 | static struct notifier_block kvmclock_cpufreq_notifier_block = { |
| 2960 | .notifier_call = kvmclock_cpufreq_notifier |
| 2961 | }; |
| 2962 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2963 | int kvm_arch_init(void *opaque) |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2964 | { |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 2965 | int r, cpu; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2966 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
| 2967 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2968 | if (kvm_x86_ops) { |
| 2969 | printk(KERN_ERR "kvm: already loaded the other module\n"); |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 2970 | r = -EEXIST; |
| 2971 | goto out; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2972 | } |
| 2973 | |
| 2974 | if (!ops->cpu_has_kvm_support()) { |
| 2975 | printk(KERN_ERR "kvm: no hardware support\n"); |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 2976 | r = -EOPNOTSUPP; |
| 2977 | goto out; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2978 | } |
| 2979 | if (ops->disabled_by_bios()) { |
| 2980 | printk(KERN_ERR "kvm: disabled by bios\n"); |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 2981 | r = -EOPNOTSUPP; |
| 2982 | goto out; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2983 | } |
| 2984 | |
Avi Kivity | 97db56c | 2008-01-13 13:23:56 +0200 | [diff] [blame] | 2985 | r = kvm_mmu_module_init(); |
| 2986 | if (r) |
| 2987 | goto out; |
| 2988 | |
| 2989 | kvm_init_msr_list(); |
| 2990 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2991 | kvm_x86_ops = ops; |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 2992 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
Sheng Yang | 7b52345 | 2008-04-25 21:13:50 +0800 | [diff] [blame] | 2993 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
| 2994 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
Sheng Yang | 4b12f0d | 2009-04-27 20:35:42 +0800 | [diff] [blame] | 2995 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 2996 | |
| 2997 | for_each_possible_cpu(cpu) |
| 2998 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; |
| 2999 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
| 3000 | tsc_khz_ref = tsc_khz; |
| 3001 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
| 3002 | CPUFREQ_TRANSITION_NOTIFIER); |
| 3003 | } |
| 3004 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 3005 | return 0; |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 3006 | |
| 3007 | out: |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 3008 | return r; |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 3009 | } |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3010 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 3011 | void kvm_arch_exit(void) |
| 3012 | { |
Jan Kiszka | 888d256 | 2009-04-17 19:24:58 +0200 | [diff] [blame] | 3013 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
| 3014 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, |
| 3015 | CPUFREQ_TRANSITION_NOTIFIER); |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 3016 | kvm_x86_ops = NULL; |
Zhang Xiantao | 56c6d28 | 2007-11-18 20:43:21 +0800 | [diff] [blame] | 3017 | kvm_mmu_module_exit(); |
| 3018 | } |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 3019 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3020 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
| 3021 | { |
| 3022 | ++vcpu->stat.halt_exits; |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 3023 | KVMTRACE_0D(HLT, vcpu, handler); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3024 | if (irqchip_in_kernel(vcpu->kvm)) { |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 3025 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3026 | return 1; |
| 3027 | } else { |
| 3028 | vcpu->run->exit_reason = KVM_EXIT_HLT; |
| 3029 | return 0; |
| 3030 | } |
| 3031 | } |
| 3032 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); |
| 3033 | |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 3034 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
| 3035 | unsigned long a1) |
| 3036 | { |
| 3037 | if (is_long_mode(vcpu)) |
| 3038 | return a0; |
| 3039 | else |
| 3040 | return a0 | ((gpa_t)a1 << 32); |
| 3041 | } |
| 3042 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3043 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
| 3044 | { |
| 3045 | unsigned long nr, a0, a1, a2, a3, ret; |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 3046 | int r = 1; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3047 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3048 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 3049 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); |
| 3050 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 3051 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); |
| 3052 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3053 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 3054 | KVMTRACE_1D(VMMCALL, vcpu, (u32)nr, handler); |
| 3055 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3056 | if (!is_long_mode(vcpu)) { |
| 3057 | nr &= 0xFFFFFFFF; |
| 3058 | a0 &= 0xFFFFFFFF; |
| 3059 | a1 &= 0xFFFFFFFF; |
| 3060 | a2 &= 0xFFFFFFFF; |
| 3061 | a3 &= 0xFFFFFFFF; |
| 3062 | } |
| 3063 | |
| 3064 | switch (nr) { |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3065 | case KVM_HC_VAPIC_POLL_IRQ: |
| 3066 | ret = 0; |
| 3067 | break; |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 3068 | case KVM_HC_MMU_OP: |
| 3069 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); |
| 3070 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3071 | default: |
| 3072 | ret = -KVM_ENOSYS; |
| 3073 | break; |
| 3074 | } |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3075 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
Amit Shah | f11c3a8 | 2008-02-21 01:00:30 +0530 | [diff] [blame] | 3076 | ++vcpu->stat.hypercalls; |
Marcelo Tosatti | 2f333bc | 2008-02-22 12:21:37 -0500 | [diff] [blame] | 3077 | return r; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3078 | } |
| 3079 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); |
| 3080 | |
| 3081 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) |
| 3082 | { |
| 3083 | char instruction[3]; |
| 3084 | int ret = 0; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3085 | unsigned long rip = kvm_rip_read(vcpu); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3086 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3087 | |
| 3088 | /* |
| 3089 | * Blow out the MMU to ensure that no other VCPU has an active mapping |
| 3090 | * to ensure that the updated hypercall appears atomically across all |
| 3091 | * VCPUs. |
| 3092 | */ |
| 3093 | kvm_mmu_zap_all(vcpu->kvm); |
| 3094 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3095 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3096 | if (emulator_write_emulated(rip, instruction, 3, vcpu) |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3097 | != X86EMUL_CONTINUE) |
| 3098 | ret = -EFAULT; |
| 3099 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3100 | return ret; |
| 3101 | } |
| 3102 | |
| 3103 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
| 3104 | { |
| 3105 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
| 3106 | } |
| 3107 | |
| 3108 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) |
| 3109 | { |
| 3110 | struct descriptor_table dt = { limit, base }; |
| 3111 | |
| 3112 | kvm_x86_ops->set_gdt(vcpu, &dt); |
| 3113 | } |
| 3114 | |
| 3115 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) |
| 3116 | { |
| 3117 | struct descriptor_table dt = { limit, base }; |
| 3118 | |
| 3119 | kvm_x86_ops->set_idt(vcpu, &dt); |
| 3120 | } |
| 3121 | |
| 3122 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, |
| 3123 | unsigned long *rflags) |
| 3124 | { |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3125 | kvm_lmsw(vcpu, msw); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3126 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
| 3127 | } |
| 3128 | |
| 3129 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) |
| 3130 | { |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 3131 | unsigned long value; |
| 3132 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3133 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
| 3134 | switch (cr) { |
| 3135 | case 0: |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 3136 | value = vcpu->arch.cr0; |
| 3137 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3138 | case 2: |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 3139 | value = vcpu->arch.cr2; |
| 3140 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3141 | case 3: |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 3142 | value = vcpu->arch.cr3; |
| 3143 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3144 | case 4: |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 3145 | value = vcpu->arch.cr4; |
| 3146 | break; |
Joerg Roedel | 152ff9b | 2007-12-06 15:46:52 +0100 | [diff] [blame] | 3147 | case 8: |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 3148 | value = kvm_get_cr8(vcpu); |
| 3149 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3150 | default: |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 3151 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3152 | return 0; |
| 3153 | } |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 3154 | KVMTRACE_3D(CR_READ, vcpu, (u32)cr, (u32)value, |
| 3155 | (u32)((u64)value >> 32), handler); |
| 3156 | |
| 3157 | return value; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3158 | } |
| 3159 | |
| 3160 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, |
| 3161 | unsigned long *rflags) |
| 3162 | { |
Joerg Roedel | 54e445c | 2008-04-30 17:56:02 +0200 | [diff] [blame] | 3163 | KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr, (u32)val, |
| 3164 | (u32)((u64)val >> 32), handler); |
| 3165 | |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3166 | switch (cr) { |
| 3167 | case 0: |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3168 | kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val)); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3169 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
| 3170 | break; |
| 3171 | case 2: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3172 | vcpu->arch.cr2 = val; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3173 | break; |
| 3174 | case 3: |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3175 | kvm_set_cr3(vcpu, val); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3176 | break; |
| 3177 | case 4: |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3178 | kvm_set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val)); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3179 | break; |
Joerg Roedel | 152ff9b | 2007-12-06 15:46:52 +0100 | [diff] [blame] | 3180 | case 8: |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3181 | kvm_set_cr8(vcpu, val & 0xfUL); |
Joerg Roedel | 152ff9b | 2007-12-06 15:46:52 +0100 | [diff] [blame] | 3182 | break; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3183 | default: |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 3184 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3185 | } |
| 3186 | } |
| 3187 | |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3188 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
| 3189 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3190 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
| 3191 | int j, nent = vcpu->arch.cpuid_nent; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3192 | |
| 3193 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; |
| 3194 | /* 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] | 3195 | for (j = i + 1; ; j = (j + 1) % nent) { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3196 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3197 | if (ej->function == e->function) { |
| 3198 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
| 3199 | return j; |
| 3200 | } |
| 3201 | } |
| 3202 | return 0; /* silence gcc, even though control never reaches here */ |
| 3203 | } |
| 3204 | |
| 3205 | /* find an entry with matching function, matching index (if needed), and that |
| 3206 | * should be read next (if it's stateful) */ |
| 3207 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, |
| 3208 | u32 function, u32 index) |
| 3209 | { |
| 3210 | if (e->function != function) |
| 3211 | return 0; |
| 3212 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) |
| 3213 | return 0; |
| 3214 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && |
Amit Shah | 1935547 | 2009-01-14 16:56:00 +0000 | [diff] [blame] | 3215 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3216 | return 0; |
| 3217 | return 1; |
| 3218 | } |
| 3219 | |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 3220 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
| 3221 | u32 function, u32 index) |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3222 | { |
| 3223 | int i; |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 3224 | struct kvm_cpuid_entry2 *best = NULL; |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3225 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3226 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 3227 | struct kvm_cpuid_entry2 *e; |
| 3228 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3229 | e = &vcpu->arch.cpuid_entries[i]; |
Dan Kenigsberg | 0771671 | 2007-11-21 17:10:04 +0200 | [diff] [blame] | 3230 | if (is_matching_cpuid_entry(e, function, index)) { |
| 3231 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) |
| 3232 | move_to_next_stateful_cpuid_entry(vcpu, i); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3233 | best = e; |
| 3234 | break; |
| 3235 | } |
| 3236 | /* |
| 3237 | * Both basic or both extended? |
| 3238 | */ |
| 3239 | if (((e->function ^ function) & 0x80000000) == 0) |
| 3240 | if (!best || e->function > best->function) |
| 3241 | best = e; |
| 3242 | } |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 3243 | return best; |
| 3244 | } |
| 3245 | |
Dong, Eddie | 82725b2 | 2009-03-30 16:21:08 +0800 | [diff] [blame] | 3246 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
| 3247 | { |
| 3248 | struct kvm_cpuid_entry2 *best; |
| 3249 | |
| 3250 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); |
| 3251 | if (best) |
| 3252 | return best->eax & 0xff; |
| 3253 | return 36; |
| 3254 | } |
| 3255 | |
Alexander Graf | d801747 | 2008-11-25 20:17:11 +0100 | [diff] [blame] | 3256 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
| 3257 | { |
| 3258 | u32 function, index; |
| 3259 | struct kvm_cpuid_entry2 *best; |
| 3260 | |
| 3261 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 3262 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 3263 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); |
| 3264 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); |
| 3265 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); |
| 3266 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); |
| 3267 | best = kvm_find_cpuid_entry(vcpu, function, index); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3268 | if (best) { |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3269 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
| 3270 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); |
| 3271 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); |
| 3272 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3273 | } |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3274 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 3275 | KVMTRACE_5D(CPUID, vcpu, function, |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3276 | (u32)kvm_register_read(vcpu, VCPU_REGS_RAX), |
| 3277 | (u32)kvm_register_read(vcpu, VCPU_REGS_RBX), |
| 3278 | (u32)kvm_register_read(vcpu, VCPU_REGS_RCX), |
| 3279 | (u32)kvm_register_read(vcpu, VCPU_REGS_RDX), handler); |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 3280 | } |
| 3281 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 3282 | |
| 3283 | /* |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3284 | * Check if userspace requested an interrupt window, and that the |
| 3285 | * interrupt window is open. |
| 3286 | * |
| 3287 | * No need to exit to userspace if we already have an interrupt queued. |
| 3288 | */ |
| 3289 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu, |
| 3290 | struct kvm_run *kvm_run) |
| 3291 | { |
Gleb Natapov | 8061823 | 2009-04-21 17:44:56 +0300 | [diff] [blame] | 3292 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3293 | kvm_run->request_interrupt_window && |
Gleb Natapov | 5df5664 | 2009-04-21 17:44:59 +0300 | [diff] [blame] | 3294 | kvm_arch_interrupt_allowed(vcpu)); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3295 | } |
| 3296 | |
| 3297 | static void post_kvm_run_save(struct kvm_vcpu *vcpu, |
| 3298 | struct kvm_run *kvm_run) |
| 3299 | { |
| 3300 | 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] | 3301 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3302 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
Jan Kiszka | 4531220 | 2008-12-11 16:54:54 +0100 | [diff] [blame] | 3303 | if (irqchip_in_kernel(vcpu->kvm)) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3304 | kvm_run->ready_for_interrupt_injection = 1; |
Jan Kiszka | 4531220 | 2008-12-11 16:54:54 +0100 | [diff] [blame] | 3305 | else |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3306 | kvm_run->ready_for_interrupt_injection = |
Gleb Natapov | fa9726b | 2009-05-11 13:35:47 +0300 | [diff] [blame] | 3307 | kvm_arch_interrupt_allowed(vcpu) && |
| 3308 | !kvm_cpu_has_interrupt(vcpu) && |
| 3309 | !kvm_event_needs_reinjection(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3310 | } |
| 3311 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3312 | static void vapic_enter(struct kvm_vcpu *vcpu) |
| 3313 | { |
| 3314 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 3315 | struct page *page; |
| 3316 | |
| 3317 | if (!apic || !apic->vapic_addr) |
| 3318 | return; |
| 3319 | |
| 3320 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 3321 | |
| 3322 | vcpu->arch.apic->vapic_page = page; |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3323 | } |
| 3324 | |
| 3325 | static void vapic_exit(struct kvm_vcpu *vcpu) |
| 3326 | { |
| 3327 | struct kvm_lapic *apic = vcpu->arch.apic; |
| 3328 | |
| 3329 | if (!apic || !apic->vapic_addr) |
| 3330 | return; |
| 3331 | |
Marcelo Tosatti | f8b78fa | 2008-06-23 12:04:25 -0300 | [diff] [blame] | 3332 | down_read(&vcpu->kvm->slots_lock); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3333 | kvm_release_page_dirty(apic->vapic_page); |
| 3334 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); |
Marcelo Tosatti | f8b78fa | 2008-06-23 12:04:25 -0300 | [diff] [blame] | 3335 | up_read(&vcpu->kvm->slots_lock); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3336 | } |
| 3337 | |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3338 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
| 3339 | { |
| 3340 | int max_irr, tpr; |
| 3341 | |
| 3342 | if (!kvm_x86_ops->update_cr8_intercept) |
| 3343 | return; |
| 3344 | |
Gleb Natapov | 8db3baa | 2009-05-11 13:35:54 +0300 | [diff] [blame] | 3345 | if (!vcpu->arch.apic->vapic_addr) |
| 3346 | max_irr = kvm_lapic_find_highest_irr(vcpu); |
| 3347 | else |
| 3348 | max_irr = -1; |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3349 | |
| 3350 | if (max_irr != -1) |
| 3351 | max_irr >>= 4; |
| 3352 | |
| 3353 | tpr = kvm_lapic_get_cr8(vcpu); |
| 3354 | |
| 3355 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); |
| 3356 | } |
| 3357 | |
Gleb Natapov | 6a8b1d1 | 2009-05-11 13:35:51 +0300 | [diff] [blame] | 3358 | 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] | 3359 | { |
Gleb Natapov | 6a8b1d1 | 2009-05-11 13:35:51 +0300 | [diff] [blame] | 3360 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
| 3361 | kvm_x86_ops->set_interrupt_shadow(vcpu, 0); |
| 3362 | |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3363 | /* try to reinject previous events if any */ |
| 3364 | if (vcpu->arch.nmi_injected) { |
| 3365 | kvm_x86_ops->set_nmi(vcpu); |
| 3366 | return; |
| 3367 | } |
| 3368 | |
| 3369 | if (vcpu->arch.interrupt.pending) { |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 3370 | kvm_x86_ops->set_irq(vcpu); |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3371 | return; |
| 3372 | } |
| 3373 | |
| 3374 | /* try to inject new event if pending */ |
| 3375 | if (vcpu->arch.nmi_pending) { |
| 3376 | if (kvm_x86_ops->nmi_allowed(vcpu)) { |
| 3377 | vcpu->arch.nmi_pending = false; |
| 3378 | vcpu->arch.nmi_injected = true; |
| 3379 | kvm_x86_ops->set_nmi(vcpu); |
| 3380 | } |
| 3381 | } else if (kvm_cpu_has_interrupt(vcpu)) { |
| 3382 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 3383 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
| 3384 | false); |
| 3385 | kvm_x86_ops->set_irq(vcpu); |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3386 | } |
| 3387 | } |
| 3388 | } |
| 3389 | |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3390 | 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] | 3391 | { |
| 3392 | int r; |
Gleb Natapov | 6a8b1d1 | 2009-05-11 13:35:51 +0300 | [diff] [blame] | 3393 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
| 3394 | kvm_run->request_interrupt_window; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3395 | |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 3396 | if (vcpu->requests) |
| 3397 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) |
| 3398 | kvm_mmu_unload(vcpu); |
| 3399 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3400 | r = kvm_mmu_reload(vcpu); |
| 3401 | if (unlikely(r)) |
| 3402 | goto out; |
| 3403 | |
Avi Kivity | 2f52d58 | 2008-01-16 12:49:30 +0200 | [diff] [blame] | 3404 | if (vcpu->requests) { |
| 3405 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) |
Marcelo Tosatti | 2f59971 | 2008-05-27 12:10:20 -0300 | [diff] [blame] | 3406 | __kvm_migrate_timers(vcpu); |
Gerd Hoffmann | c807660 | 2009-02-04 17:52:04 +0100 | [diff] [blame] | 3407 | if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests)) |
| 3408 | kvm_write_guest_time(vcpu); |
Marcelo Tosatti | 4731d4c | 2008-09-23 13:18:39 -0300 | [diff] [blame] | 3409 | if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests)) |
| 3410 | kvm_mmu_sync_roots(vcpu); |
Marcelo Tosatti | d4acf7e | 2008-06-06 16:37:35 -0300 | [diff] [blame] | 3411 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
| 3412 | kvm_x86_ops->tlb_flush(vcpu); |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3413 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
| 3414 | &vcpu->requests)) { |
| 3415 | kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS; |
| 3416 | r = 0; |
| 3417 | goto out; |
| 3418 | } |
Joerg Roedel | 71c4dfa | 2008-02-26 16:49:16 +0100 | [diff] [blame] | 3419 | if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) { |
| 3420 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; |
| 3421 | r = 0; |
| 3422 | goto out; |
| 3423 | } |
Avi Kivity | 2f52d58 | 2008-01-16 12:49:30 +0200 | [diff] [blame] | 3424 | } |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3425 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3426 | preempt_disable(); |
| 3427 | |
| 3428 | kvm_x86_ops->prepare_guest_switch(vcpu); |
| 3429 | kvm_load_guest_fpu(vcpu); |
| 3430 | |
| 3431 | local_irq_disable(); |
| 3432 | |
Marcelo Tosatti | 32f8840 | 2009-05-07 17:55:12 -0300 | [diff] [blame] | 3433 | clear_bit(KVM_REQ_KICK, &vcpu->requests); |
| 3434 | smp_mb__after_clear_bit(); |
| 3435 | |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3436 | if (vcpu->requests || need_resched() || signal_pending(current)) { |
Avi Kivity | 6c14280 | 2008-01-15 18:27:32 +0200 | [diff] [blame] | 3437 | local_irq_enable(); |
| 3438 | preempt_enable(); |
| 3439 | r = 1; |
| 3440 | goto out; |
| 3441 | } |
| 3442 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3443 | if (vcpu->arch.exception.pending) |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 3444 | __queue_exception(vcpu); |
Avi Kivity | eb9774f | 2007-11-25 17:45:31 +0200 | [diff] [blame] | 3445 | else |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3446 | inject_pending_irq(vcpu, kvm_run); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3447 | |
Gleb Natapov | 6a8b1d1 | 2009-05-11 13:35:51 +0300 | [diff] [blame] | 3448 | /* enable NMI/IRQ window open exits if needed */ |
| 3449 | if (vcpu->arch.nmi_pending) |
| 3450 | kvm_x86_ops->enable_nmi_window(vcpu); |
| 3451 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) |
| 3452 | kvm_x86_ops->enable_irq_window(vcpu); |
| 3453 | |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3454 | if (kvm_lapic_enabled(vcpu)) { |
Gleb Natapov | 8db3baa | 2009-05-11 13:35:54 +0300 | [diff] [blame] | 3455 | update_cr8_intercept(vcpu); |
| 3456 | kvm_lapic_sync_to_vapic(vcpu); |
Gleb Natapov | 95ba827313 | 2009-04-21 17:45:08 +0300 | [diff] [blame] | 3457 | } |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3458 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 3459 | up_read(&vcpu->kvm->slots_lock); |
| 3460 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3461 | kvm_guest_enter(); |
| 3462 | |
Jan Kiszka | 42dbaa5 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 3463 | get_debugreg(vcpu->arch.host_dr6, 6); |
| 3464 | get_debugreg(vcpu->arch.host_dr7, 7); |
| 3465 | if (unlikely(vcpu->arch.switch_db_regs)) { |
| 3466 | get_debugreg(vcpu->arch.host_db[0], 0); |
| 3467 | get_debugreg(vcpu->arch.host_db[1], 1); |
| 3468 | get_debugreg(vcpu->arch.host_db[2], 2); |
| 3469 | get_debugreg(vcpu->arch.host_db[3], 3); |
| 3470 | |
| 3471 | set_debugreg(0, 7); |
| 3472 | set_debugreg(vcpu->arch.eff_db[0], 0); |
| 3473 | set_debugreg(vcpu->arch.eff_db[1], 1); |
| 3474 | set_debugreg(vcpu->arch.eff_db[2], 2); |
| 3475 | set_debugreg(vcpu->arch.eff_db[3], 3); |
| 3476 | } |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3477 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 3478 | KVMTRACE_0D(VMENTRY, vcpu, entryexit); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3479 | kvm_x86_ops->run(vcpu, kvm_run); |
| 3480 | |
Jan Kiszka | 42dbaa5 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 3481 | if (unlikely(vcpu->arch.switch_db_regs)) { |
| 3482 | set_debugreg(0, 7); |
| 3483 | set_debugreg(vcpu->arch.host_db[0], 0); |
| 3484 | set_debugreg(vcpu->arch.host_db[1], 1); |
| 3485 | set_debugreg(vcpu->arch.host_db[2], 2); |
| 3486 | set_debugreg(vcpu->arch.host_db[3], 3); |
| 3487 | } |
| 3488 | set_debugreg(vcpu->arch.host_dr6, 6); |
| 3489 | set_debugreg(vcpu->arch.host_dr7, 7); |
| 3490 | |
Marcelo Tosatti | 32f8840 | 2009-05-07 17:55:12 -0300 | [diff] [blame] | 3491 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3492 | local_irq_enable(); |
| 3493 | |
| 3494 | ++vcpu->stat.exits; |
| 3495 | |
| 3496 | /* |
| 3497 | * We must have an instruction between local_irq_enable() and |
| 3498 | * kvm_guest_exit(), so the timer interrupt isn't delayed by |
| 3499 | * the interrupt shadow. The stat.exits increment will do nicely. |
| 3500 | * But we need to prevent reordering, hence this barrier(): |
| 3501 | */ |
| 3502 | barrier(); |
| 3503 | |
| 3504 | kvm_guest_exit(); |
| 3505 | |
| 3506 | preempt_enable(); |
| 3507 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 3508 | down_read(&vcpu->kvm->slots_lock); |
| 3509 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3510 | /* |
| 3511 | * Profile KVM exit RIPs: |
| 3512 | */ |
| 3513 | if (unlikely(prof_on == KVM_PROFILING)) { |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3514 | unsigned long rip = kvm_rip_read(vcpu); |
| 3515 | profile_hit(KVM_PROFILING, (void *)rip); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3516 | } |
| 3517 | |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 3518 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3519 | kvm_lapic_sync_from_vapic(vcpu); |
| 3520 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3521 | r = kvm_x86_ops->handle_exit(kvm_run, vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3522 | out: |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3523 | return r; |
| 3524 | } |
| 3525 | |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 3526 | |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3527 | static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 3528 | { |
| 3529 | int r; |
| 3530 | |
| 3531 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { |
Jan Kiszka | 1b10bf3 | 2008-09-30 10:41:06 +0200 | [diff] [blame] | 3532 | pr_debug("vcpu %d received sipi with vector # %x\n", |
| 3533 | vcpu->vcpu_id, vcpu->arch.sipi_vector); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3534 | kvm_lapic_reset(vcpu); |
Gleb Natapov | 5f17928 | 2008-10-07 15:42:33 +0200 | [diff] [blame] | 3535 | r = kvm_arch_vcpu_reset(vcpu); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3536 | if (r) |
| 3537 | return r; |
| 3538 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3539 | } |
| 3540 | |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3541 | down_read(&vcpu->kvm->slots_lock); |
| 3542 | vapic_enter(vcpu); |
| 3543 | |
| 3544 | r = 1; |
| 3545 | while (r > 0) { |
Gleb Natapov | af2152f | 2008-09-22 14:28:53 +0300 | [diff] [blame] | 3546 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3547 | r = vcpu_enter_guest(vcpu, kvm_run); |
| 3548 | else { |
| 3549 | up_read(&vcpu->kvm->slots_lock); |
| 3550 | kvm_vcpu_block(vcpu); |
| 3551 | down_read(&vcpu->kvm->slots_lock); |
| 3552 | if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests)) |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 3553 | { |
| 3554 | switch(vcpu->arch.mp_state) { |
| 3555 | case KVM_MP_STATE_HALTED: |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3556 | vcpu->arch.mp_state = |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 3557 | KVM_MP_STATE_RUNNABLE; |
| 3558 | case KVM_MP_STATE_RUNNABLE: |
| 3559 | break; |
| 3560 | case KVM_MP_STATE_SIPI_RECEIVED: |
| 3561 | default: |
| 3562 | r = -EINTR; |
| 3563 | break; |
| 3564 | } |
| 3565 | } |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3566 | } |
| 3567 | |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 3568 | if (r <= 0) |
| 3569 | break; |
| 3570 | |
| 3571 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); |
| 3572 | if (kvm_cpu_has_pending_timer(vcpu)) |
| 3573 | kvm_inject_pending_timer_irqs(vcpu); |
| 3574 | |
| 3575 | if (dm_request_for_irq_injection(vcpu, kvm_run)) { |
| 3576 | r = -EINTR; |
| 3577 | kvm_run->exit_reason = KVM_EXIT_INTR; |
| 3578 | ++vcpu->stat.request_irq_exits; |
| 3579 | } |
| 3580 | if (signal_pending(current)) { |
| 3581 | r = -EINTR; |
| 3582 | kvm_run->exit_reason = KVM_EXIT_INTR; |
| 3583 | ++vcpu->stat.signal_exits; |
| 3584 | } |
| 3585 | if (need_resched()) { |
| 3586 | up_read(&vcpu->kvm->slots_lock); |
| 3587 | kvm_resched(vcpu); |
| 3588 | down_read(&vcpu->kvm->slots_lock); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3589 | } |
| 3590 | } |
| 3591 | |
| 3592 | up_read(&vcpu->kvm->slots_lock); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3593 | post_kvm_run_save(vcpu, kvm_run); |
| 3594 | |
Avi Kivity | b93463a | 2007-10-25 16:52:32 +0200 | [diff] [blame] | 3595 | vapic_exit(vcpu); |
| 3596 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3597 | return r; |
| 3598 | } |
| 3599 | |
| 3600 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 3601 | { |
| 3602 | int r; |
| 3603 | sigset_t sigsaved; |
| 3604 | |
| 3605 | vcpu_load(vcpu); |
| 3606 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3607 | if (vcpu->sigset_active) |
| 3608 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); |
| 3609 | |
Avi Kivity | ac9f6dc | 2008-07-06 15:48:31 +0300 | [diff] [blame] | 3610 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
| 3611 | kvm_vcpu_block(vcpu); |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 3612 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
Avi Kivity | ac9f6dc | 2008-07-06 15:48:31 +0300 | [diff] [blame] | 3613 | r = -EAGAIN; |
| 3614 | goto out; |
| 3615 | } |
| 3616 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3617 | /* re-sync apic's tpr */ |
| 3618 | if (!irqchip_in_kernel(vcpu->kvm)) |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3619 | kvm_set_cr8(vcpu, kvm_run->cr8); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3620 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3621 | if (vcpu->arch.pio.cur_count) { |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3622 | r = complete_pio(vcpu); |
| 3623 | if (r) |
| 3624 | goto out; |
| 3625 | } |
| 3626 | #if CONFIG_HAS_IOMEM |
| 3627 | if (vcpu->mmio_needed) { |
| 3628 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); |
| 3629 | vcpu->mmio_read_completed = 1; |
| 3630 | vcpu->mmio_needed = 0; |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 3631 | |
| 3632 | down_read(&vcpu->kvm->slots_lock); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3633 | r = emulate_instruction(vcpu, kvm_run, |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 3634 | vcpu->arch.mmio_fault_cr2, 0, |
| 3635 | EMULTYPE_NO_DECODE); |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 3636 | up_read(&vcpu->kvm->slots_lock); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3637 | if (r == EMULATE_DO_MMIO) { |
| 3638 | /* |
| 3639 | * Read-modify-write. Back to userspace. |
| 3640 | */ |
| 3641 | r = 0; |
| 3642 | goto out; |
| 3643 | } |
| 3644 | } |
| 3645 | #endif |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3646 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
| 3647 | kvm_register_write(vcpu, VCPU_REGS_RAX, |
| 3648 | kvm_run->hypercall.ret); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3649 | |
| 3650 | r = __vcpu_run(vcpu, kvm_run); |
| 3651 | |
| 3652 | out: |
| 3653 | if (vcpu->sigset_active) |
| 3654 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 3655 | |
| 3656 | vcpu_put(vcpu); |
| 3657 | return r; |
| 3658 | } |
| 3659 | |
| 3660 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 3661 | { |
| 3662 | vcpu_load(vcpu); |
| 3663 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3664 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 3665 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); |
| 3666 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 3667 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); |
| 3668 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); |
| 3669 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); |
| 3670 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); |
| 3671 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3672 | #ifdef CONFIG_X86_64 |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3673 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
| 3674 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); |
| 3675 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); |
| 3676 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); |
| 3677 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); |
| 3678 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); |
| 3679 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); |
| 3680 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3681 | #endif |
| 3682 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3683 | regs->rip = kvm_rip_read(vcpu); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3684 | regs->rflags = kvm_x86_ops->get_rflags(vcpu); |
| 3685 | |
| 3686 | /* |
| 3687 | * Don't leak debug flags in case they were set for guest debugging |
| 3688 | */ |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 3689 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3690 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); |
| 3691 | |
| 3692 | vcpu_put(vcpu); |
| 3693 | |
| 3694 | return 0; |
| 3695 | } |
| 3696 | |
| 3697 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 3698 | { |
| 3699 | vcpu_load(vcpu); |
| 3700 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3701 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
| 3702 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); |
| 3703 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); |
| 3704 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); |
| 3705 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); |
| 3706 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); |
| 3707 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); |
| 3708 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3709 | #ifdef CONFIG_X86_64 |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3710 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
| 3711 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); |
| 3712 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); |
| 3713 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); |
| 3714 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); |
| 3715 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); |
| 3716 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); |
| 3717 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); |
| 3718 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3719 | #endif |
| 3720 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3721 | kvm_rip_write(vcpu, regs->rip); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3722 | kvm_x86_ops->set_rflags(vcpu, regs->rflags); |
| 3723 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3724 | |
Jan Kiszka | b4f14ab | 2008-04-30 17:59:04 +0200 | [diff] [blame] | 3725 | vcpu->arch.exception.pending = false; |
| 3726 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3727 | vcpu_put(vcpu); |
| 3728 | |
| 3729 | return 0; |
| 3730 | } |
| 3731 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3732 | void kvm_get_segment(struct kvm_vcpu *vcpu, |
| 3733 | struct kvm_segment *var, int seg) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3734 | { |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 3735 | kvm_x86_ops->get_segment(vcpu, var, seg); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3736 | } |
| 3737 | |
| 3738 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
| 3739 | { |
| 3740 | struct kvm_segment cs; |
| 3741 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3742 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3743 | *db = cs.db; |
| 3744 | *l = cs.l; |
| 3745 | } |
| 3746 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); |
| 3747 | |
| 3748 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| 3749 | struct kvm_sregs *sregs) |
| 3750 | { |
| 3751 | struct descriptor_table dt; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3752 | |
| 3753 | vcpu_load(vcpu); |
| 3754 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3755 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
| 3756 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); |
| 3757 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); |
| 3758 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); |
| 3759 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); |
| 3760 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3761 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3762 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
| 3763 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3764 | |
| 3765 | kvm_x86_ops->get_idt(vcpu, &dt); |
| 3766 | sregs->idt.limit = dt.limit; |
| 3767 | sregs->idt.base = dt.base; |
| 3768 | kvm_x86_ops->get_gdt(vcpu, &dt); |
| 3769 | sregs->gdt.limit = dt.limit; |
| 3770 | sregs->gdt.base = dt.base; |
| 3771 | |
| 3772 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3773 | sregs->cr0 = vcpu->arch.cr0; |
| 3774 | sregs->cr2 = vcpu->arch.cr2; |
| 3775 | sregs->cr3 = vcpu->arch.cr3; |
| 3776 | sregs->cr4 = vcpu->arch.cr4; |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 3777 | sregs->cr8 = kvm_get_cr8(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3778 | sregs->efer = vcpu->arch.shadow_efer; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3779 | sregs->apic_base = kvm_get_apic_base(vcpu); |
| 3780 | |
Gleb Natapov | 923c61b | 2009-05-11 13:35:48 +0300 | [diff] [blame] | 3781 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3782 | |
Gleb Natapov | 36752c9 | 2009-05-11 13:35:53 +0300 | [diff] [blame] | 3783 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
Gleb Natapov | 14d0bc1 | 2009-04-21 17:45:11 +0300 | [diff] [blame] | 3784 | set_bit(vcpu->arch.interrupt.nr, |
| 3785 | (unsigned long *)sregs->interrupt_bitmap); |
Gleb Natapov | 16d7a19 | 2009-04-21 17:45:10 +0300 | [diff] [blame] | 3786 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3787 | vcpu_put(vcpu); |
| 3788 | |
| 3789 | return 0; |
| 3790 | } |
| 3791 | |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 3792 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
| 3793 | struct kvm_mp_state *mp_state) |
| 3794 | { |
| 3795 | vcpu_load(vcpu); |
| 3796 | mp_state->mp_state = vcpu->arch.mp_state; |
| 3797 | vcpu_put(vcpu); |
| 3798 | return 0; |
| 3799 | } |
| 3800 | |
| 3801 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
| 3802 | struct kvm_mp_state *mp_state) |
| 3803 | { |
| 3804 | vcpu_load(vcpu); |
| 3805 | vcpu->arch.mp_state = mp_state->mp_state; |
| 3806 | vcpu_put(vcpu); |
| 3807 | return 0; |
| 3808 | } |
| 3809 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3810 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3811 | struct kvm_segment *var, int seg) |
| 3812 | { |
Harvey Harrison | 14af3f3 | 2008-02-19 10:25:50 -0800 | [diff] [blame] | 3813 | kvm_x86_ops->set_segment(vcpu, var, seg); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 3814 | } |
| 3815 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3816 | static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector, |
| 3817 | struct kvm_segment *kvm_desct) |
| 3818 | { |
| 3819 | kvm_desct->base = seg_desc->base0; |
| 3820 | kvm_desct->base |= seg_desc->base1 << 16; |
| 3821 | kvm_desct->base |= seg_desc->base2 << 24; |
| 3822 | kvm_desct->limit = seg_desc->limit0; |
| 3823 | kvm_desct->limit |= seg_desc->limit << 16; |
Marcelo Tosatti | c93cd3a | 2008-07-19 19:08:07 -0300 | [diff] [blame] | 3824 | if (seg_desc->g) { |
| 3825 | kvm_desct->limit <<= 12; |
| 3826 | kvm_desct->limit |= 0xfff; |
| 3827 | } |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3828 | kvm_desct->selector = selector; |
| 3829 | kvm_desct->type = seg_desc->type; |
| 3830 | kvm_desct->present = seg_desc->p; |
| 3831 | kvm_desct->dpl = seg_desc->dpl; |
| 3832 | kvm_desct->db = seg_desc->d; |
| 3833 | kvm_desct->s = seg_desc->s; |
| 3834 | kvm_desct->l = seg_desc->l; |
| 3835 | kvm_desct->g = seg_desc->g; |
| 3836 | kvm_desct->avl = seg_desc->avl; |
| 3837 | if (!selector) |
| 3838 | kvm_desct->unusable = 1; |
| 3839 | else |
| 3840 | kvm_desct->unusable = 0; |
| 3841 | kvm_desct->padding = 0; |
| 3842 | } |
| 3843 | |
Amit Shah | b8222ad | 2008-10-22 16:39:47 +0530 | [diff] [blame] | 3844 | static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu, |
| 3845 | u16 selector, |
| 3846 | struct descriptor_table *dtable) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3847 | { |
| 3848 | if (selector & 1 << 2) { |
| 3849 | struct kvm_segment kvm_seg; |
| 3850 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3851 | kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3852 | |
| 3853 | if (kvm_seg.unusable) |
| 3854 | dtable->limit = 0; |
| 3855 | else |
| 3856 | dtable->limit = kvm_seg.limit; |
| 3857 | dtable->base = kvm_seg.base; |
| 3858 | } |
| 3859 | else |
| 3860 | kvm_x86_ops->get_gdt(vcpu, dtable); |
| 3861 | } |
| 3862 | |
| 3863 | /* allowed just for 8 bytes segments */ |
| 3864 | static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
| 3865 | struct desc_struct *seg_desc) |
| 3866 | { |
Marcelo Tosatti | 98899aa | 2008-07-16 19:07:10 -0300 | [diff] [blame] | 3867 | gpa_t gpa; |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3868 | struct descriptor_table dtable; |
| 3869 | u16 index = selector >> 3; |
| 3870 | |
Amit Shah | b8222ad | 2008-10-22 16:39:47 +0530 | [diff] [blame] | 3871 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3872 | |
| 3873 | if (dtable.limit < index * 8 + 7) { |
| 3874 | kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc); |
| 3875 | return 1; |
| 3876 | } |
Marcelo Tosatti | 98899aa | 2008-07-16 19:07:10 -0300 | [diff] [blame] | 3877 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
| 3878 | gpa += index * 8; |
| 3879 | return kvm_read_guest(vcpu->kvm, gpa, seg_desc, 8); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3880 | } |
| 3881 | |
| 3882 | /* allowed just for 8 bytes segments */ |
| 3883 | static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
| 3884 | struct desc_struct *seg_desc) |
| 3885 | { |
Marcelo Tosatti | 98899aa | 2008-07-16 19:07:10 -0300 | [diff] [blame] | 3886 | gpa_t gpa; |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3887 | struct descriptor_table dtable; |
| 3888 | u16 index = selector >> 3; |
| 3889 | |
Amit Shah | b8222ad | 2008-10-22 16:39:47 +0530 | [diff] [blame] | 3890 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3891 | |
| 3892 | if (dtable.limit < index * 8 + 7) |
| 3893 | return 1; |
Marcelo Tosatti | 98899aa | 2008-07-16 19:07:10 -0300 | [diff] [blame] | 3894 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
| 3895 | gpa += index * 8; |
| 3896 | return kvm_write_guest(vcpu->kvm, gpa, seg_desc, 8); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3897 | } |
| 3898 | |
| 3899 | static u32 get_tss_base_addr(struct kvm_vcpu *vcpu, |
| 3900 | struct desc_struct *seg_desc) |
| 3901 | { |
| 3902 | u32 base_addr; |
| 3903 | |
| 3904 | base_addr = seg_desc->base0; |
| 3905 | base_addr |= (seg_desc->base1 << 16); |
| 3906 | base_addr |= (seg_desc->base2 << 24); |
| 3907 | |
Marcelo Tosatti | 98899aa | 2008-07-16 19:07:10 -0300 | [diff] [blame] | 3908 | return vcpu->arch.mmu.gva_to_gpa(vcpu, base_addr); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3909 | } |
| 3910 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3911 | static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg) |
| 3912 | { |
| 3913 | struct kvm_segment kvm_seg; |
| 3914 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3915 | kvm_get_segment(vcpu, &kvm_seg, seg); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3916 | return kvm_seg.selector; |
| 3917 | } |
| 3918 | |
| 3919 | static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu, |
| 3920 | u16 selector, |
| 3921 | struct kvm_segment *kvm_seg) |
| 3922 | { |
| 3923 | struct desc_struct seg_desc; |
| 3924 | |
| 3925 | if (load_guest_segment_descriptor(vcpu, selector, &seg_desc)) |
| 3926 | return 1; |
| 3927 | seg_desct_to_kvm_desct(&seg_desc, selector, kvm_seg); |
| 3928 | return 0; |
| 3929 | } |
| 3930 | |
Harvey Harrison | 2259e3a | 2008-08-22 13:29:17 -0700 | [diff] [blame] | 3931 | 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] | 3932 | { |
| 3933 | struct kvm_segment segvar = { |
| 3934 | .base = selector << 4, |
| 3935 | .limit = 0xffff, |
| 3936 | .selector = selector, |
| 3937 | .type = 3, |
| 3938 | .present = 1, |
| 3939 | .dpl = 3, |
| 3940 | .db = 0, |
| 3941 | .s = 1, |
| 3942 | .l = 0, |
| 3943 | .g = 0, |
| 3944 | .avl = 0, |
| 3945 | .unusable = 0, |
| 3946 | }; |
| 3947 | kvm_x86_ops->set_segment(vcpu, &segvar, seg); |
| 3948 | return 0; |
| 3949 | } |
| 3950 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3951 | int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
| 3952 | int type_bits, int seg) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3953 | { |
| 3954 | struct kvm_segment kvm_seg; |
| 3955 | |
Avi Kivity | f4bbd9a | 2008-08-20 15:51:42 +0300 | [diff] [blame] | 3956 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) |
| 3957 | return kvm_load_realmode_segment(vcpu, selector, seg); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3958 | if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg)) |
| 3959 | return 1; |
| 3960 | kvm_seg.type |= type_bits; |
| 3961 | |
| 3962 | if (seg != VCPU_SREG_SS && seg != VCPU_SREG_CS && |
| 3963 | seg != VCPU_SREG_LDTR) |
| 3964 | if (!kvm_seg.s) |
| 3965 | kvm_seg.unusable = 1; |
| 3966 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 3967 | kvm_set_segment(vcpu, &kvm_seg, seg); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3968 | return 0; |
| 3969 | } |
| 3970 | |
| 3971 | static void save_state_to_tss32(struct kvm_vcpu *vcpu, |
| 3972 | struct tss_segment_32 *tss) |
| 3973 | { |
| 3974 | tss->cr3 = vcpu->arch.cr3; |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3975 | tss->eip = kvm_rip_read(vcpu); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3976 | tss->eflags = kvm_x86_ops->get_rflags(vcpu); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3977 | tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 3978 | tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 3979 | tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX); |
| 3980 | tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX); |
| 3981 | tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP); |
| 3982 | tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP); |
| 3983 | tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI); |
| 3984 | tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3985 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); |
| 3986 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); |
| 3987 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); |
| 3988 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); |
| 3989 | tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS); |
| 3990 | tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS); |
| 3991 | tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 3992 | } |
| 3993 | |
| 3994 | static int load_state_from_tss32(struct kvm_vcpu *vcpu, |
| 3995 | struct tss_segment_32 *tss) |
| 3996 | { |
| 3997 | kvm_set_cr3(vcpu, tss->cr3); |
| 3998 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 3999 | kvm_rip_write(vcpu, tss->eip); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4000 | kvm_x86_ops->set_rflags(vcpu, tss->eflags | 2); |
| 4001 | |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 4002 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax); |
| 4003 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx); |
| 4004 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx); |
| 4005 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx); |
| 4006 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp); |
| 4007 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp); |
| 4008 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi); |
| 4009 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4010 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4011 | 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] | 4012 | return 1; |
| 4013 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4014 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4015 | return 1; |
| 4016 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4017 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4018 | return 1; |
| 4019 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4020 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4021 | return 1; |
| 4022 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4023 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4024 | return 1; |
| 4025 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4026 | if (kvm_load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4027 | return 1; |
| 4028 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4029 | if (kvm_load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4030 | return 1; |
| 4031 | return 0; |
| 4032 | } |
| 4033 | |
| 4034 | static void save_state_to_tss16(struct kvm_vcpu *vcpu, |
| 4035 | struct tss_segment_16 *tss) |
| 4036 | { |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 4037 | tss->ip = kvm_rip_read(vcpu); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4038 | tss->flag = kvm_x86_ops->get_rflags(vcpu); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 4039 | tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
| 4040 | tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX); |
| 4041 | tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX); |
| 4042 | tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX); |
| 4043 | tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP); |
| 4044 | tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP); |
| 4045 | tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI); |
| 4046 | tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4047 | |
| 4048 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); |
| 4049 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); |
| 4050 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); |
| 4051 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); |
| 4052 | tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR); |
| 4053 | tss->prev_task_link = get_segment_selector(vcpu, VCPU_SREG_TR); |
| 4054 | } |
| 4055 | |
| 4056 | static int load_state_from_tss16(struct kvm_vcpu *vcpu, |
| 4057 | struct tss_segment_16 *tss) |
| 4058 | { |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 4059 | kvm_rip_write(vcpu, tss->ip); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4060 | kvm_x86_ops->set_rflags(vcpu, tss->flag | 2); |
Marcelo Tosatti | 5fdbf97 | 2008-06-27 14:58:02 -0300 | [diff] [blame] | 4061 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax); |
| 4062 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx); |
| 4063 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx); |
| 4064 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx); |
| 4065 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp); |
| 4066 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp); |
| 4067 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si); |
| 4068 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4069 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4070 | if (kvm_load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4071 | return 1; |
| 4072 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4073 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4074 | return 1; |
| 4075 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4076 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4077 | return 1; |
| 4078 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4079 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4080 | return 1; |
| 4081 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4082 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4083 | return 1; |
| 4084 | return 0; |
| 4085 | } |
| 4086 | |
Harvey Harrison | 8b2cf73 | 2008-04-27 12:14:13 -0700 | [diff] [blame] | 4087 | 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] | 4088 | u16 old_tss_sel, u32 old_tss_base, |
| 4089 | struct desc_struct *nseg_desc) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4090 | { |
| 4091 | struct tss_segment_16 tss_segment_16; |
| 4092 | int ret = 0; |
| 4093 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4094 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
| 4095 | sizeof tss_segment_16)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4096 | goto out; |
| 4097 | |
| 4098 | save_state_to_tss16(vcpu, &tss_segment_16); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4099 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4100 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
| 4101 | sizeof tss_segment_16)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4102 | goto out; |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4103 | |
| 4104 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), |
| 4105 | &tss_segment_16, sizeof tss_segment_16)) |
| 4106 | goto out; |
| 4107 | |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 4108 | if (old_tss_sel != 0xffff) { |
| 4109 | tss_segment_16.prev_task_link = old_tss_sel; |
| 4110 | |
| 4111 | if (kvm_write_guest(vcpu->kvm, |
| 4112 | get_tss_base_addr(vcpu, nseg_desc), |
| 4113 | &tss_segment_16.prev_task_link, |
| 4114 | sizeof tss_segment_16.prev_task_link)) |
| 4115 | goto out; |
| 4116 | } |
| 4117 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4118 | if (load_state_from_tss16(vcpu, &tss_segment_16)) |
| 4119 | goto out; |
| 4120 | |
| 4121 | ret = 1; |
| 4122 | out: |
| 4123 | return ret; |
| 4124 | } |
| 4125 | |
Harvey Harrison | 8b2cf73 | 2008-04-27 12:14:13 -0700 | [diff] [blame] | 4126 | 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] | 4127 | u16 old_tss_sel, u32 old_tss_base, |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4128 | struct desc_struct *nseg_desc) |
| 4129 | { |
| 4130 | struct tss_segment_32 tss_segment_32; |
| 4131 | int ret = 0; |
| 4132 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4133 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
| 4134 | sizeof tss_segment_32)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4135 | goto out; |
| 4136 | |
| 4137 | save_state_to_tss32(vcpu, &tss_segment_32); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4138 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4139 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
| 4140 | sizeof tss_segment_32)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4141 | goto out; |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4142 | |
| 4143 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), |
| 4144 | &tss_segment_32, sizeof tss_segment_32)) |
| 4145 | goto out; |
| 4146 | |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 4147 | if (old_tss_sel != 0xffff) { |
| 4148 | tss_segment_32.prev_task_link = old_tss_sel; |
| 4149 | |
| 4150 | if (kvm_write_guest(vcpu->kvm, |
| 4151 | get_tss_base_addr(vcpu, nseg_desc), |
| 4152 | &tss_segment_32.prev_task_link, |
| 4153 | sizeof tss_segment_32.prev_task_link)) |
| 4154 | goto out; |
| 4155 | } |
| 4156 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4157 | if (load_state_from_tss32(vcpu, &tss_segment_32)) |
| 4158 | goto out; |
| 4159 | |
| 4160 | ret = 1; |
| 4161 | out: |
| 4162 | return ret; |
| 4163 | } |
| 4164 | |
| 4165 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason) |
| 4166 | { |
| 4167 | struct kvm_segment tr_seg; |
| 4168 | struct desc_struct cseg_desc; |
| 4169 | struct desc_struct nseg_desc; |
| 4170 | int ret = 0; |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4171 | u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR); |
| 4172 | u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4173 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4174 | 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] | 4175 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4176 | /* FIXME: Handle errors. Failure to read either TSS or their |
| 4177 | * descriptors should generate a pagefault. |
| 4178 | */ |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4179 | if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc)) |
| 4180 | goto out; |
| 4181 | |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4182 | if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc)) |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4183 | goto out; |
| 4184 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4185 | if (reason != TASK_SWITCH_IRET) { |
| 4186 | int cpl; |
| 4187 | |
| 4188 | cpl = kvm_x86_ops->get_cpl(vcpu); |
| 4189 | if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) { |
| 4190 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); |
| 4191 | return 1; |
| 4192 | } |
| 4193 | } |
| 4194 | |
| 4195 | if (!nseg_desc.p || (nseg_desc.limit0 | nseg_desc.limit << 16) < 0x67) { |
| 4196 | kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc); |
| 4197 | return 1; |
| 4198 | } |
| 4199 | |
| 4200 | if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) { |
Izik Eidus | 3fe913e | 2008-04-28 18:23:52 +0300 | [diff] [blame] | 4201 | cseg_desc.type &= ~(1 << 1); //clear the B flag |
Marcelo Tosatti | 34198bf8 | 2008-07-16 19:07:11 -0300 | [diff] [blame] | 4202 | save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4203 | } |
| 4204 | |
| 4205 | if (reason == TASK_SWITCH_IRET) { |
| 4206 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); |
| 4207 | kvm_x86_ops->set_rflags(vcpu, eflags & ~X86_EFLAGS_NT); |
| 4208 | } |
| 4209 | |
Gleb Natapov | 64a7ec0 | 2009-03-30 16:03:29 +0300 | [diff] [blame] | 4210 | /* set back link to prev task only if NT bit is set in eflags |
| 4211 | note that old_tss_sel is not used afetr this point */ |
| 4212 | if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE) |
| 4213 | old_tss_sel = 0xffff; |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4214 | |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 4215 | /* set back link to prev task only if NT bit is set in eflags |
| 4216 | note that old_tss_sel is not used afetr this point */ |
| 4217 | if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE) |
| 4218 | old_tss_sel = 0xffff; |
| 4219 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4220 | if (nseg_desc.type & 8) |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 4221 | ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_sel, |
| 4222 | old_tss_base, &nseg_desc); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4223 | else |
Gleb Natapov | b237ac3 | 2009-03-30 16:03:24 +0300 | [diff] [blame] | 4224 | ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_sel, |
| 4225 | old_tss_base, &nseg_desc); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4226 | |
| 4227 | if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) { |
| 4228 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); |
| 4229 | kvm_x86_ops->set_rflags(vcpu, eflags | X86_EFLAGS_NT); |
| 4230 | } |
| 4231 | |
| 4232 | if (reason != TASK_SWITCH_IRET) { |
Izik Eidus | 3fe913e | 2008-04-28 18:23:52 +0300 | [diff] [blame] | 4233 | nseg_desc.type |= (1 << 1); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4234 | save_guest_segment_descriptor(vcpu, tss_selector, |
| 4235 | &nseg_desc); |
| 4236 | } |
| 4237 | |
| 4238 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 | X86_CR0_TS); |
| 4239 | seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg); |
| 4240 | tr_seg.type = 11; |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4241 | kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR); |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4242 | out: |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 4243 | return ret; |
| 4244 | } |
| 4245 | EXPORT_SYMBOL_GPL(kvm_task_switch); |
| 4246 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4247 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| 4248 | struct kvm_sregs *sregs) |
| 4249 | { |
| 4250 | int mmu_reset_needed = 0; |
Gleb Natapov | 923c61b | 2009-05-11 13:35:48 +0300 | [diff] [blame] | 4251 | int pending_vec, max_bits; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4252 | struct descriptor_table dt; |
| 4253 | |
| 4254 | vcpu_load(vcpu); |
| 4255 | |
| 4256 | dt.limit = sregs->idt.limit; |
| 4257 | dt.base = sregs->idt.base; |
| 4258 | kvm_x86_ops->set_idt(vcpu, &dt); |
| 4259 | dt.limit = sregs->gdt.limit; |
| 4260 | dt.base = sregs->gdt.base; |
| 4261 | kvm_x86_ops->set_gdt(vcpu, &dt); |
| 4262 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4263 | vcpu->arch.cr2 = sregs->cr2; |
| 4264 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; |
Marcelo Tosatti | 59839df | 2009-04-16 08:30:44 -0300 | [diff] [blame] | 4265 | |
| 4266 | down_read(&vcpu->kvm->slots_lock); |
| 4267 | if (gfn_to_memslot(vcpu->kvm, sregs->cr3 >> PAGE_SHIFT)) |
| 4268 | vcpu->arch.cr3 = sregs->cr3; |
| 4269 | else |
| 4270 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); |
| 4271 | up_read(&vcpu->kvm->slots_lock); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4272 | |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 4273 | kvm_set_cr8(vcpu, sregs->cr8); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4274 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4275 | mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4276 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4277 | kvm_set_apic_base(vcpu, sregs->apic_base); |
| 4278 | |
| 4279 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
| 4280 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4281 | mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4282 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
Paul Knowles | d730616 | 2008-02-06 11:02:35 +0000 | [diff] [blame] | 4283 | vcpu->arch.cr0 = sregs->cr0; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4284 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4285 | mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4286 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
| 4287 | if (!is_long_mode(vcpu) && is_pae(vcpu)) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4288 | load_pdptrs(vcpu, vcpu->arch.cr3); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4289 | |
| 4290 | if (mmu_reset_needed) |
| 4291 | kvm_mmu_reset_context(vcpu); |
| 4292 | |
Gleb Natapov | 923c61b | 2009-05-11 13:35:48 +0300 | [diff] [blame] | 4293 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
| 4294 | pending_vec = find_first_bit( |
| 4295 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); |
| 4296 | if (pending_vec < max_bits) { |
Gleb Natapov | 66fd3f7 | 2009-05-11 13:35:50 +0300 | [diff] [blame] | 4297 | kvm_queue_interrupt(vcpu, pending_vec, false); |
Gleb Natapov | 923c61b | 2009-05-11 13:35:48 +0300 | [diff] [blame] | 4298 | pr_debug("Set back pending irq %d\n", pending_vec); |
| 4299 | if (irqchip_in_kernel(vcpu->kvm)) |
| 4300 | kvm_pic_clear_isr_ack(vcpu->kvm); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4301 | } |
| 4302 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4303 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
| 4304 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); |
| 4305 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); |
| 4306 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); |
| 4307 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); |
| 4308 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4309 | |
Guillaume Thouvenin | 3e6e0aa | 2008-05-27 10:18:46 +0200 | [diff] [blame] | 4310 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
| 4311 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4312 | |
Marcelo Tosatti | 9c3e4aa | 2008-09-10 16:40:55 -0300 | [diff] [blame] | 4313 | /* Older userspace won't unhalt the vcpu on reset. */ |
| 4314 | if (vcpu->vcpu_id == 0 && kvm_rip_read(vcpu) == 0xfff0 && |
| 4315 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
| 4316 | !(vcpu->arch.cr0 & X86_CR0_PE)) |
| 4317 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
| 4318 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4319 | vcpu_put(vcpu); |
| 4320 | |
| 4321 | return 0; |
| 4322 | } |
| 4323 | |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 4324 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
| 4325 | struct kvm_guest_debug *dbg) |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4326 | { |
Jan Kiszka | ae675ef | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 4327 | int i, r; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4328 | |
| 4329 | vcpu_load(vcpu); |
| 4330 | |
Jan Kiszka | ae675ef | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 4331 | if ((dbg->control & (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) == |
| 4332 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) { |
| 4333 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
| 4334 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; |
| 4335 | vcpu->arch.switch_db_regs = |
| 4336 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); |
| 4337 | } else { |
| 4338 | for (i = 0; i < KVM_NR_DB_REGS; i++) |
| 4339 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; |
| 4340 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); |
| 4341 | } |
| 4342 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4343 | r = kvm_x86_ops->set_guest_debug(vcpu, dbg); |
| 4344 | |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 4345 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
| 4346 | kvm_queue_exception(vcpu, DB_VECTOR); |
| 4347 | else if (dbg->control & KVM_GUESTDBG_INJECT_BP) |
| 4348 | kvm_queue_exception(vcpu, BP_VECTOR); |
| 4349 | |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 4350 | vcpu_put(vcpu); |
| 4351 | |
| 4352 | return r; |
| 4353 | } |
| 4354 | |
| 4355 | /* |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4356 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when |
| 4357 | * we have asm/x86/processor.h |
| 4358 | */ |
| 4359 | struct fxsave { |
| 4360 | u16 cwd; |
| 4361 | u16 swd; |
| 4362 | u16 twd; |
| 4363 | u16 fop; |
| 4364 | u64 rip; |
| 4365 | u64 rdp; |
| 4366 | u32 mxcsr; |
| 4367 | u32 mxcsr_mask; |
| 4368 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ |
| 4369 | #ifdef CONFIG_X86_64 |
| 4370 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ |
| 4371 | #else |
| 4372 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ |
| 4373 | #endif |
| 4374 | }; |
| 4375 | |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 4376 | /* |
| 4377 | * Translate a guest virtual address to a guest physical address. |
| 4378 | */ |
| 4379 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
| 4380 | struct kvm_translation *tr) |
| 4381 | { |
| 4382 | unsigned long vaddr = tr->linear_address; |
| 4383 | gpa_t gpa; |
| 4384 | |
| 4385 | vcpu_load(vcpu); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4386 | down_read(&vcpu->kvm->slots_lock); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4387 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4388 | up_read(&vcpu->kvm->slots_lock); |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 4389 | tr->physical_address = gpa; |
| 4390 | tr->valid = gpa != UNMAPPED_GVA; |
| 4391 | tr->writeable = 1; |
| 4392 | tr->usermode = 0; |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 4393 | vcpu_put(vcpu); |
| 4394 | |
| 4395 | return 0; |
| 4396 | } |
| 4397 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4398 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 4399 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4400 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4401 | |
| 4402 | vcpu_load(vcpu); |
| 4403 | |
| 4404 | memcpy(fpu->fpr, fxsave->st_space, 128); |
| 4405 | fpu->fcw = fxsave->cwd; |
| 4406 | fpu->fsw = fxsave->swd; |
| 4407 | fpu->ftwx = fxsave->twd; |
| 4408 | fpu->last_opcode = fxsave->fop; |
| 4409 | fpu->last_ip = fxsave->rip; |
| 4410 | fpu->last_dp = fxsave->rdp; |
| 4411 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); |
| 4412 | |
| 4413 | vcpu_put(vcpu); |
| 4414 | |
| 4415 | return 0; |
| 4416 | } |
| 4417 | |
| 4418 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 4419 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4420 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4421 | |
| 4422 | vcpu_load(vcpu); |
| 4423 | |
| 4424 | memcpy(fxsave->st_space, fpu->fpr, 128); |
| 4425 | fxsave->cwd = fpu->fcw; |
| 4426 | fxsave->swd = fpu->fsw; |
| 4427 | fxsave->twd = fpu->ftwx; |
| 4428 | fxsave->fop = fpu->last_opcode; |
| 4429 | fxsave->rip = fpu->last_ip; |
| 4430 | fxsave->rdp = fpu->last_dp; |
| 4431 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); |
| 4432 | |
| 4433 | vcpu_put(vcpu); |
| 4434 | |
| 4435 | return 0; |
| 4436 | } |
| 4437 | |
| 4438 | void fx_init(struct kvm_vcpu *vcpu) |
| 4439 | { |
| 4440 | unsigned after_mxcsr_mask; |
| 4441 | |
Andrea Arcangeli | bc1a34f | 2008-05-01 18:43:33 +0200 | [diff] [blame] | 4442 | /* |
| 4443 | * Touch the fpu the first time in non atomic context as if |
| 4444 | * this is the first fpu instruction the exception handler |
| 4445 | * will fire before the instruction returns and it'll have to |
| 4446 | * allocate ram with GFP_KERNEL. |
| 4447 | */ |
| 4448 | if (!used_math()) |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 4449 | kvm_fx_save(&vcpu->arch.host_fx_image); |
Andrea Arcangeli | bc1a34f | 2008-05-01 18:43:33 +0200 | [diff] [blame] | 4450 | |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4451 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
| 4452 | preempt_disable(); |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 4453 | kvm_fx_save(&vcpu->arch.host_fx_image); |
| 4454 | kvm_fx_finit(); |
| 4455 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
| 4456 | kvm_fx_restore(&vcpu->arch.host_fx_image); |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4457 | preempt_enable(); |
| 4458 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4459 | vcpu->arch.cr0 |= X86_CR0_ET; |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4460 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4461 | vcpu->arch.guest_fx_image.mxcsr = 0x1f80; |
| 4462 | memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask, |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4463 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); |
| 4464 | } |
| 4465 | EXPORT_SYMBOL_GPL(fx_init); |
| 4466 | |
| 4467 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
| 4468 | { |
| 4469 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) |
| 4470 | return; |
| 4471 | |
| 4472 | vcpu->guest_fpu_loaded = 1; |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 4473 | kvm_fx_save(&vcpu->arch.host_fx_image); |
| 4474 | kvm_fx_restore(&vcpu->arch.guest_fx_image); |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4475 | } |
| 4476 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); |
| 4477 | |
| 4478 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) |
| 4479 | { |
| 4480 | if (!vcpu->guest_fpu_loaded) |
| 4481 | return; |
| 4482 | |
| 4483 | vcpu->guest_fpu_loaded = 0; |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 4484 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
| 4485 | kvm_fx_restore(&vcpu->arch.host_fx_image); |
Avi Kivity | f096ed8 | 2007-11-18 13:54:33 +0200 | [diff] [blame] | 4486 | ++vcpu->stat.fpu_reload; |
Hollis Blanchard | d075206 | 2007-10-31 17:24:25 -0500 | [diff] [blame] | 4487 | } |
| 4488 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4489 | |
| 4490 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) |
| 4491 | { |
Joerg Roedel | 7f1ea20 | 2009-02-25 16:08:31 +0100 | [diff] [blame] | 4492 | if (vcpu->arch.time_page) { |
| 4493 | kvm_release_page_dirty(vcpu->arch.time_page); |
| 4494 | vcpu->arch.time_page = NULL; |
| 4495 | } |
| 4496 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4497 | kvm_x86_ops->vcpu_free(vcpu); |
| 4498 | } |
| 4499 | |
| 4500 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, |
| 4501 | unsigned int id) |
| 4502 | { |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 4503 | return kvm_x86_ops->vcpu_create(kvm, id); |
| 4504 | } |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4505 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 4506 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
| 4507 | { |
| 4508 | int r; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4509 | |
| 4510 | /* We do fxsave: this must be aligned. */ |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4511 | BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4512 | |
Sheng Yang | 0bed3b5 | 2008-10-09 16:01:54 +0800 | [diff] [blame] | 4513 | vcpu->arch.mtrr_state.have_fixed = 1; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4514 | vcpu_load(vcpu); |
| 4515 | r = kvm_arch_vcpu_reset(vcpu); |
| 4516 | if (r == 0) |
| 4517 | r = kvm_mmu_setup(vcpu); |
| 4518 | vcpu_put(vcpu); |
| 4519 | if (r < 0) |
| 4520 | goto free_vcpu; |
| 4521 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 4522 | return 0; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4523 | free_vcpu: |
| 4524 | kvm_x86_ops->vcpu_free(vcpu); |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 4525 | return r; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4526 | } |
| 4527 | |
Hollis Blanchard | d40ccc6 | 2007-11-19 14:04:43 -0600 | [diff] [blame] | 4528 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4529 | { |
| 4530 | vcpu_load(vcpu); |
| 4531 | kvm_mmu_unload(vcpu); |
| 4532 | vcpu_put(vcpu); |
| 4533 | |
| 4534 | kvm_x86_ops->vcpu_free(vcpu); |
| 4535 | } |
| 4536 | |
| 4537 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) |
| 4538 | { |
Jan Kiszka | 448fa4a | 2008-09-26 09:30:48 +0200 | [diff] [blame] | 4539 | vcpu->arch.nmi_pending = false; |
| 4540 | vcpu->arch.nmi_injected = false; |
| 4541 | |
Jan Kiszka | 42dbaa5 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 4542 | vcpu->arch.switch_db_regs = 0; |
| 4543 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
| 4544 | vcpu->arch.dr6 = DR6_FIXED_1; |
| 4545 | vcpu->arch.dr7 = DR7_FIXED_1; |
| 4546 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4547 | return kvm_x86_ops->vcpu_reset(vcpu); |
| 4548 | } |
| 4549 | |
| 4550 | void kvm_arch_hardware_enable(void *garbage) |
| 4551 | { |
| 4552 | kvm_x86_ops->hardware_enable(garbage); |
| 4553 | } |
| 4554 | |
| 4555 | void kvm_arch_hardware_disable(void *garbage) |
| 4556 | { |
| 4557 | kvm_x86_ops->hardware_disable(garbage); |
| 4558 | } |
| 4559 | |
| 4560 | int kvm_arch_hardware_setup(void) |
| 4561 | { |
| 4562 | return kvm_x86_ops->hardware_setup(); |
| 4563 | } |
| 4564 | |
| 4565 | void kvm_arch_hardware_unsetup(void) |
| 4566 | { |
| 4567 | kvm_x86_ops->hardware_unsetup(); |
| 4568 | } |
| 4569 | |
| 4570 | void kvm_arch_check_processor_compat(void *rtn) |
| 4571 | { |
| 4572 | kvm_x86_ops->check_processor_compatibility(rtn); |
| 4573 | } |
| 4574 | |
| 4575 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
| 4576 | { |
| 4577 | struct page *page; |
| 4578 | struct kvm *kvm; |
| 4579 | int r; |
| 4580 | |
| 4581 | BUG_ON(vcpu->kvm == NULL); |
| 4582 | kvm = vcpu->kvm; |
| 4583 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4584 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4585 | if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0) |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 4586 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4587 | else |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 4588 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4589 | |
| 4590 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 4591 | if (!page) { |
| 4592 | r = -ENOMEM; |
| 4593 | goto fail; |
| 4594 | } |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4595 | vcpu->arch.pio_data = page_address(page); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4596 | |
| 4597 | r = kvm_mmu_create(vcpu); |
| 4598 | if (r < 0) |
| 4599 | goto fail_free_pio_data; |
| 4600 | |
| 4601 | if (irqchip_in_kernel(kvm)) { |
| 4602 | r = kvm_create_lapic(vcpu); |
| 4603 | if (r < 0) |
| 4604 | goto fail_mmu_destroy; |
| 4605 | } |
| 4606 | |
Huang Ying | 890ca9a | 2009-05-11 16:48:15 +0800 | [diff] [blame^] | 4607 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
| 4608 | GFP_KERNEL); |
| 4609 | if (!vcpu->arch.mce_banks) { |
| 4610 | r = -ENOMEM; |
| 4611 | goto fail_mmu_destroy; |
| 4612 | } |
| 4613 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; |
| 4614 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4615 | return 0; |
| 4616 | |
| 4617 | fail_mmu_destroy: |
| 4618 | kvm_mmu_destroy(vcpu); |
| 4619 | fail_free_pio_data: |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4620 | free_page((unsigned long)vcpu->arch.pio_data); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4621 | fail: |
| 4622 | return r; |
| 4623 | } |
| 4624 | |
| 4625 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 4626 | { |
| 4627 | kvm_free_lapic(vcpu); |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 4628 | down_read(&vcpu->kvm->slots_lock); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4629 | kvm_mmu_destroy(vcpu); |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 4630 | up_read(&vcpu->kvm->slots_lock); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 4631 | free_page((unsigned long)vcpu->arch.pio_data); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 4632 | } |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4633 | |
| 4634 | struct kvm *kvm_arch_create_vm(void) |
| 4635 | { |
| 4636 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); |
| 4637 | |
| 4638 | if (!kvm) |
| 4639 | return ERR_PTR(-ENOMEM); |
| 4640 | |
Zhang Xiantao | f05e70a | 2007-12-14 10:01:48 +0800 | [diff] [blame] | 4641 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
Ben-Ami Yassour | 4d5c5d0 | 2008-07-28 19:26:26 +0300 | [diff] [blame] | 4642 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4643 | |
Sheng Yang | 5550af4 | 2008-10-15 20:15:06 +0800 | [diff] [blame] | 4644 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
| 4645 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); |
| 4646 | |
Marcelo Tosatti | 53f658b3 | 2008-12-11 20:45:05 +0100 | [diff] [blame] | 4647 | rdtscll(kvm->arch.vm_init_tsc); |
| 4648 | |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4649 | return kvm; |
| 4650 | } |
| 4651 | |
| 4652 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) |
| 4653 | { |
| 4654 | vcpu_load(vcpu); |
| 4655 | kvm_mmu_unload(vcpu); |
| 4656 | vcpu_put(vcpu); |
| 4657 | } |
| 4658 | |
| 4659 | static void kvm_free_vcpus(struct kvm *kvm) |
| 4660 | { |
| 4661 | unsigned int i; |
| 4662 | |
| 4663 | /* |
| 4664 | * Unpin any mmu pages first. |
| 4665 | */ |
| 4666 | for (i = 0; i < KVM_MAX_VCPUS; ++i) |
| 4667 | if (kvm->vcpus[i]) |
| 4668 | kvm_unload_vcpu_mmu(kvm->vcpus[i]); |
| 4669 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| 4670 | if (kvm->vcpus[i]) { |
| 4671 | kvm_arch_vcpu_free(kvm->vcpus[i]); |
| 4672 | kvm->vcpus[i] = NULL; |
| 4673 | } |
| 4674 | } |
| 4675 | |
| 4676 | } |
| 4677 | |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 4678 | void kvm_arch_sync_events(struct kvm *kvm) |
| 4679 | { |
Sheng Yang | ba4cef3 | 2009-01-06 10:03:03 +0800 | [diff] [blame] | 4680 | kvm_free_all_assigned_devices(kvm); |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 4681 | } |
| 4682 | |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4683 | void kvm_arch_destroy_vm(struct kvm *kvm) |
| 4684 | { |
Sheng Yang | 6eb5581 | 2008-10-31 12:37:41 +0800 | [diff] [blame] | 4685 | kvm_iommu_unmap_guest(kvm); |
Sheng Yang | 7837699 | 2008-01-28 05:10:22 +0800 | [diff] [blame] | 4686 | kvm_free_pit(kvm); |
Zhang Xiantao | d7deeeb0 | 2007-12-14 10:17:34 +0800 | [diff] [blame] | 4687 | kfree(kvm->arch.vpic); |
| 4688 | kfree(kvm->arch.vioapic); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4689 | kvm_free_vcpus(kvm); |
| 4690 | kvm_free_physmem(kvm); |
Avi Kivity | 3d45830 | 2008-03-25 11:26:13 +0200 | [diff] [blame] | 4691 | if (kvm->arch.apic_access_page) |
| 4692 | put_page(kvm->arch.apic_access_page); |
Sheng Yang | b7ebfb0 | 2008-04-25 21:44:52 +0800 | [diff] [blame] | 4693 | if (kvm->arch.ept_identity_pagetable) |
| 4694 | put_page(kvm->arch.ept_identity_pagetable); |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 4695 | kfree(kvm); |
| 4696 | } |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4697 | |
| 4698 | int kvm_arch_set_memory_region(struct kvm *kvm, |
| 4699 | struct kvm_userspace_memory_region *mem, |
| 4700 | struct kvm_memory_slot old, |
| 4701 | int user_alloc) |
| 4702 | { |
| 4703 | int npages = mem->memory_size >> PAGE_SHIFT; |
| 4704 | struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot]; |
| 4705 | |
| 4706 | /*To keep backward compatibility with older userspace, |
| 4707 | *x86 needs to hanlde !user_alloc case. |
| 4708 | */ |
| 4709 | if (!user_alloc) { |
| 4710 | if (npages && !old.rmap) { |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 4711 | unsigned long userspace_addr; |
| 4712 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4713 | down_write(¤t->mm->mmap_sem); |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 4714 | userspace_addr = do_mmap(NULL, 0, |
| 4715 | npages * PAGE_SIZE, |
| 4716 | PROT_READ | PROT_WRITE, |
Avi Kivity | acee3c0 | 2008-08-26 17:22:47 +0300 | [diff] [blame] | 4717 | MAP_PRIVATE | MAP_ANONYMOUS, |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 4718 | 0); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4719 | up_write(¤t->mm->mmap_sem); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4720 | |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 4721 | if (IS_ERR((void *)userspace_addr)) |
| 4722 | return PTR_ERR((void *)userspace_addr); |
| 4723 | |
| 4724 | /* set userspace_addr atomically for kvm_hva_to_rmapp */ |
| 4725 | spin_lock(&kvm->mmu_lock); |
| 4726 | memslot->userspace_addr = userspace_addr; |
| 4727 | spin_unlock(&kvm->mmu_lock); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4728 | } else { |
| 4729 | if (!old.user_alloc && old.rmap) { |
| 4730 | int ret; |
| 4731 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4732 | down_write(¤t->mm->mmap_sem); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4733 | ret = do_munmap(current->mm, old.userspace_addr, |
| 4734 | old.npages * PAGE_SIZE); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 4735 | up_write(¤t->mm->mmap_sem); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4736 | if (ret < 0) |
| 4737 | printk(KERN_WARNING |
| 4738 | "kvm_vm_ioctl_set_memory_region: " |
| 4739 | "failed to munmap memory\n"); |
| 4740 | } |
| 4741 | } |
| 4742 | } |
| 4743 | |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 4744 | spin_lock(&kvm->mmu_lock); |
Zhang Xiantao | f05e70a | 2007-12-14 10:01:48 +0800 | [diff] [blame] | 4745 | if (!kvm->arch.n_requested_mmu_pages) { |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4746 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
| 4747 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
| 4748 | } |
| 4749 | |
| 4750 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
Marcelo Tosatti | 7c8a83b | 2009-05-12 18:55:43 -0300 | [diff] [blame] | 4751 | spin_unlock(&kvm->mmu_lock); |
Zhang Xiantao | 0de1034 | 2007-11-20 16:25:04 +0800 | [diff] [blame] | 4752 | kvm_flush_remote_tlbs(kvm); |
| 4753 | |
| 4754 | return 0; |
| 4755 | } |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 4756 | |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 4757 | void kvm_arch_flush_shadow(struct kvm *kvm) |
| 4758 | { |
| 4759 | kvm_mmu_zap_all(kvm); |
Marcelo Tosatti | 8986ecc | 2009-05-12 18:55:45 -0300 | [diff] [blame] | 4760 | kvm_reload_remote_mmus(kvm); |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 4761 | } |
| 4762 | |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 4763 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
| 4764 | { |
Avi Kivity | a453529 | 2008-04-13 17:54:35 +0300 | [diff] [blame] | 4765 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
Jan Kiszka | 0496fbb | 2008-09-26 09:30:53 +0200 | [diff] [blame] | 4766 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
| 4767 | || vcpu->arch.nmi_pending; |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 4768 | } |
Zhang Xiantao | 5736199 | 2007-12-17 14:21:40 +0800 | [diff] [blame] | 4769 | |
Zhang Xiantao | 5736199 | 2007-12-17 14:21:40 +0800 | [diff] [blame] | 4770 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
| 4771 | { |
Marcelo Tosatti | 32f8840 | 2009-05-07 17:55:12 -0300 | [diff] [blame] | 4772 | int me; |
| 4773 | int cpu = vcpu->cpu; |
Zhang Xiantao | 5736199 | 2007-12-17 14:21:40 +0800 | [diff] [blame] | 4774 | |
| 4775 | if (waitqueue_active(&vcpu->wq)) { |
| 4776 | wake_up_interruptible(&vcpu->wq); |
| 4777 | ++vcpu->stat.halt_wakeup; |
| 4778 | } |
Marcelo Tosatti | 32f8840 | 2009-05-07 17:55:12 -0300 | [diff] [blame] | 4779 | |
| 4780 | me = get_cpu(); |
| 4781 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) |
| 4782 | if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests)) |
| 4783 | smp_send_reschedule(cpu); |
Marcelo Tosatti | e9571ed | 2008-04-11 15:01:22 -0300 | [diff] [blame] | 4784 | put_cpu(); |
Zhang Xiantao | 5736199 | 2007-12-17 14:21:40 +0800 | [diff] [blame] | 4785 | } |
Gleb Natapov | 7864612 | 2009-03-23 12:12:11 +0200 | [diff] [blame] | 4786 | |
| 4787 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) |
| 4788 | { |
| 4789 | return kvm_x86_ops->interrupt_allowed(vcpu); |
| 4790 | } |