Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Kernel-based Virtual Machine driver for Linux |
| 3 | * |
| 4 | * This module enables machines with Intel VT-x extensions to run virtual |
| 5 | * machines without emulation or binary translation. |
| 6 | * |
| 7 | * Copyright (C) 2006 Qumranet, Inc. |
| 8 | * |
| 9 | * Authors: |
| 10 | * Avi Kivity <avi@qumranet.com> |
| 11 | * Yaniv Kamay <yaniv@qumranet.com> |
| 12 | * |
| 13 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 14 | * the COPYING file in the top-level directory. |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | #include "kvm.h" |
Laurent Vivier | e7d5d76 | 2007-07-30 13:41:19 +0300 | [diff] [blame] | 19 | #include "x86_emulate.h" |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 20 | #include "irq.h" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 21 | #include "vmx.h" |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 22 | #include "segment_descriptor.h" |
| 23 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 24 | #include <linux/module.h> |
Ahmed S. Darwish | 9d8f549 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 25 | #include <linux/kernel.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 26 | #include <linux/mm.h> |
| 27 | #include <linux/highmem.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 28 | #include <linux/sched.h> |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 29 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 30 | #include <asm/io.h> |
Anthony Liguori | 3b3be0d | 2006-12-13 00:33:43 -0800 | [diff] [blame] | 31 | #include <asm/desc.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 32 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 33 | MODULE_AUTHOR("Qumranet"); |
| 34 | MODULE_LICENSE("GPL"); |
| 35 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 36 | struct vmcs { |
| 37 | u32 revision_id; |
| 38 | u32 abort; |
| 39 | char data[0]; |
| 40 | }; |
| 41 | |
| 42 | struct vcpu_vmx { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 43 | struct kvm_vcpu vcpu; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 44 | int launched; |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 45 | u8 fail; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 46 | struct kvm_msr_entry *guest_msrs; |
| 47 | struct kvm_msr_entry *host_msrs; |
| 48 | int nmsrs; |
| 49 | int save_nmsrs; |
| 50 | int msr_offset_efer; |
| 51 | #ifdef CONFIG_X86_64 |
| 52 | int msr_offset_kernel_gs_base; |
| 53 | #endif |
| 54 | struct vmcs *vmcs; |
| 55 | struct { |
| 56 | int loaded; |
| 57 | u16 fs_sel, gs_sel, ldt_sel; |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 58 | int gs_ldt_reload_needed; |
| 59 | int fs_reload_needed; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 60 | }host_state; |
| 61 | |
| 62 | }; |
| 63 | |
| 64 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) |
| 65 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 66 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 67 | } |
| 68 | |
Avi Kivity | 75880a0 | 2007-06-20 11:20:04 +0300 | [diff] [blame] | 69 | static int init_rmode_tss(struct kvm *kvm); |
| 70 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 71 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
| 72 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); |
| 73 | |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 74 | static struct page *vmx_io_bitmap_a; |
| 75 | static struct page *vmx_io_bitmap_b; |
| 76 | |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 77 | #define EFER_SAVE_RESTORE_BITS ((u64)EFER_SCE) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 78 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 79 | static struct vmcs_config { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 80 | int size; |
| 81 | int order; |
| 82 | u32 revision_id; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 83 | u32 pin_based_exec_ctrl; |
| 84 | u32 cpu_based_exec_ctrl; |
| 85 | u32 vmexit_ctrl; |
| 86 | u32 vmentry_ctrl; |
| 87 | } vmcs_config; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 88 | |
| 89 | #define VMX_SEGMENT_FIELD(seg) \ |
| 90 | [VCPU_SREG_##seg] = { \ |
| 91 | .selector = GUEST_##seg##_SELECTOR, \ |
| 92 | .base = GUEST_##seg##_BASE, \ |
| 93 | .limit = GUEST_##seg##_LIMIT, \ |
| 94 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ |
| 95 | } |
| 96 | |
| 97 | static struct kvm_vmx_segment_field { |
| 98 | unsigned selector; |
| 99 | unsigned base; |
| 100 | unsigned limit; |
| 101 | unsigned ar_bytes; |
| 102 | } kvm_vmx_segment_fields[] = { |
| 103 | VMX_SEGMENT_FIELD(CS), |
| 104 | VMX_SEGMENT_FIELD(DS), |
| 105 | VMX_SEGMENT_FIELD(ES), |
| 106 | VMX_SEGMENT_FIELD(FS), |
| 107 | VMX_SEGMENT_FIELD(GS), |
| 108 | VMX_SEGMENT_FIELD(SS), |
| 109 | VMX_SEGMENT_FIELD(TR), |
| 110 | VMX_SEGMENT_FIELD(LDTR), |
| 111 | }; |
| 112 | |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 113 | /* |
| 114 | * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it |
| 115 | * away by decrementing the array size. |
| 116 | */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 117 | static const u32 vmx_msr_index[] = { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 118 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 119 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE, |
| 120 | #endif |
| 121 | MSR_EFER, MSR_K6_STAR, |
| 122 | }; |
Ahmed S. Darwish | 9d8f549 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 123 | #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 124 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 125 | static void load_msrs(struct kvm_msr_entry *e, int n) |
| 126 | { |
| 127 | int i; |
| 128 | |
| 129 | for (i = 0; i < n; ++i) |
| 130 | wrmsrl(e[i].index, e[i].data); |
| 131 | } |
| 132 | |
| 133 | static void save_msrs(struct kvm_msr_entry *e, int n) |
| 134 | { |
| 135 | int i; |
| 136 | |
| 137 | for (i = 0; i < n; ++i) |
| 138 | rdmsrl(e[i].index, e[i].data); |
| 139 | } |
| 140 | |
| 141 | static inline u64 msr_efer_save_restore_bits(struct kvm_msr_entry msr) |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 142 | { |
| 143 | return (u64)msr.data & EFER_SAVE_RESTORE_BITS; |
| 144 | } |
| 145 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 146 | static inline int msr_efer_need_save_restore(struct vcpu_vmx *vmx) |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 147 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 148 | int efer_offset = vmx->msr_offset_efer; |
| 149 | return msr_efer_save_restore_bits(vmx->host_msrs[efer_offset]) != |
| 150 | msr_efer_save_restore_bits(vmx->guest_msrs[efer_offset]); |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 151 | } |
| 152 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 153 | static inline int is_page_fault(u32 intr_info) |
| 154 | { |
| 155 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 156 | INTR_INFO_VALID_MASK)) == |
| 157 | (INTR_TYPE_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); |
| 158 | } |
| 159 | |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 160 | static inline int is_no_device(u32 intr_info) |
| 161 | { |
| 162 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 163 | INTR_INFO_VALID_MASK)) == |
| 164 | (INTR_TYPE_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); |
| 165 | } |
| 166 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 167 | static inline int is_invalid_opcode(u32 intr_info) |
| 168 | { |
| 169 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 170 | INTR_INFO_VALID_MASK)) == |
| 171 | (INTR_TYPE_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); |
| 172 | } |
| 173 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 174 | static inline int is_external_interrupt(u32 intr_info) |
| 175 | { |
| 176 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) |
| 177 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); |
| 178 | } |
| 179 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 180 | static inline int cpu_has_vmx_tpr_shadow(void) |
| 181 | { |
| 182 | return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW); |
| 183 | } |
| 184 | |
| 185 | static inline int vm_need_tpr_shadow(struct kvm *kvm) |
| 186 | { |
| 187 | return ((cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm))); |
| 188 | } |
| 189 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 190 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
Avi Kivity | 7725f0b | 2006-12-13 00:34:01 -0800 | [diff] [blame] | 191 | { |
| 192 | int i; |
| 193 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 194 | for (i = 0; i < vmx->nmsrs; ++i) |
| 195 | if (vmx->guest_msrs[i].index == msr) |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 196 | return i; |
| 197 | return -1; |
| 198 | } |
| 199 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 200 | static struct kvm_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr) |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 201 | { |
| 202 | int i; |
| 203 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 204 | i = __find_msr_index(vmx, msr); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 205 | if (i >= 0) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 206 | return &vmx->guest_msrs[i]; |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 207 | return NULL; |
Avi Kivity | 7725f0b | 2006-12-13 00:34:01 -0800 | [diff] [blame] | 208 | } |
| 209 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 210 | static void vmcs_clear(struct vmcs *vmcs) |
| 211 | { |
| 212 | u64 phys_addr = __pa(vmcs); |
| 213 | u8 error; |
| 214 | |
| 215 | asm volatile (ASM_VMX_VMCLEAR_RAX "; setna %0" |
| 216 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
| 217 | : "cc", "memory"); |
| 218 | if (error) |
| 219 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", |
| 220 | vmcs, phys_addr); |
| 221 | } |
| 222 | |
| 223 | static void __vcpu_clear(void *arg) |
| 224 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 225 | struct vcpu_vmx *vmx = arg; |
Ingo Molnar | d3b2c33 | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 226 | int cpu = raw_smp_processor_id(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 227 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 228 | if (vmx->vcpu.cpu == cpu) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 229 | vmcs_clear(vmx->vmcs); |
| 230 | if (per_cpu(current_vmcs, cpu) == vmx->vmcs) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 231 | per_cpu(current_vmcs, cpu) = NULL; |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 232 | rdtscll(vmx->vcpu.host_tsc); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 233 | } |
| 234 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 235 | static void vcpu_clear(struct vcpu_vmx *vmx) |
Avi Kivity | 8d0be2b | 2007-02-12 00:54:46 -0800 | [diff] [blame] | 236 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 237 | if (vmx->vcpu.cpu != raw_smp_processor_id() && vmx->vcpu.cpu != -1) |
| 238 | smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, |
| 239 | vmx, 0, 1); |
Avi Kivity | 8d0be2b | 2007-02-12 00:54:46 -0800 | [diff] [blame] | 240 | else |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 241 | __vcpu_clear(vmx); |
| 242 | vmx->launched = 0; |
Avi Kivity | 8d0be2b | 2007-02-12 00:54:46 -0800 | [diff] [blame] | 243 | } |
| 244 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 245 | static unsigned long vmcs_readl(unsigned long field) |
| 246 | { |
| 247 | unsigned long value; |
| 248 | |
| 249 | asm volatile (ASM_VMX_VMREAD_RDX_RAX |
| 250 | : "=a"(value) : "d"(field) : "cc"); |
| 251 | return value; |
| 252 | } |
| 253 | |
| 254 | static u16 vmcs_read16(unsigned long field) |
| 255 | { |
| 256 | return vmcs_readl(field); |
| 257 | } |
| 258 | |
| 259 | static u32 vmcs_read32(unsigned long field) |
| 260 | { |
| 261 | return vmcs_readl(field); |
| 262 | } |
| 263 | |
| 264 | static u64 vmcs_read64(unsigned long field) |
| 265 | { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 266 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 267 | return vmcs_readl(field); |
| 268 | #else |
| 269 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); |
| 270 | #endif |
| 271 | } |
| 272 | |
Avi Kivity | e52de1b | 2007-01-05 16:36:56 -0800 | [diff] [blame] | 273 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
| 274 | { |
| 275 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", |
| 276 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); |
| 277 | dump_stack(); |
| 278 | } |
| 279 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 280 | static void vmcs_writel(unsigned long field, unsigned long value) |
| 281 | { |
| 282 | u8 error; |
| 283 | |
| 284 | asm volatile (ASM_VMX_VMWRITE_RAX_RDX "; setna %0" |
| 285 | : "=q"(error) : "a"(value), "d"(field) : "cc" ); |
Avi Kivity | e52de1b | 2007-01-05 16:36:56 -0800 | [diff] [blame] | 286 | if (unlikely(error)) |
| 287 | vmwrite_error(field, value); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 288 | } |
| 289 | |
| 290 | static void vmcs_write16(unsigned long field, u16 value) |
| 291 | { |
| 292 | vmcs_writel(field, value); |
| 293 | } |
| 294 | |
| 295 | static void vmcs_write32(unsigned long field, u32 value) |
| 296 | { |
| 297 | vmcs_writel(field, value); |
| 298 | } |
| 299 | |
| 300 | static void vmcs_write64(unsigned long field, u64 value) |
| 301 | { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 302 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 303 | vmcs_writel(field, value); |
| 304 | #else |
| 305 | vmcs_writel(field, value); |
| 306 | asm volatile (""); |
| 307 | vmcs_writel(field+1, value >> 32); |
| 308 | #endif |
| 309 | } |
| 310 | |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 311 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
| 312 | { |
| 313 | vmcs_writel(field, vmcs_readl(field) & ~mask); |
| 314 | } |
| 315 | |
| 316 | static void vmcs_set_bits(unsigned long field, u32 mask) |
| 317 | { |
| 318 | vmcs_writel(field, vmcs_readl(field) | mask); |
| 319 | } |
| 320 | |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 321 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
| 322 | { |
| 323 | u32 eb; |
| 324 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 325 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR); |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 326 | if (!vcpu->fpu_active) |
| 327 | eb |= 1u << NM_VECTOR; |
| 328 | if (vcpu->guest_debug.enabled) |
| 329 | eb |= 1u << 1; |
| 330 | if (vcpu->rmode.active) |
| 331 | eb = ~0; |
| 332 | vmcs_write32(EXCEPTION_BITMAP, eb); |
| 333 | } |
| 334 | |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 335 | static void reload_tss(void) |
| 336 | { |
| 337 | #ifndef CONFIG_X86_64 |
| 338 | |
| 339 | /* |
| 340 | * VT restores TR but not its size. Useless. |
| 341 | */ |
| 342 | struct descriptor_table gdt; |
| 343 | struct segment_descriptor *descs; |
| 344 | |
| 345 | get_gdt(&gdt); |
| 346 | descs = (void *)gdt.base; |
| 347 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ |
| 348 | load_TR_desc(); |
| 349 | #endif |
| 350 | } |
| 351 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 352 | static void load_transition_efer(struct vcpu_vmx *vmx) |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 353 | { |
| 354 | u64 trans_efer; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 355 | int efer_offset = vmx->msr_offset_efer; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 356 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 357 | trans_efer = vmx->host_msrs[efer_offset].data; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 358 | trans_efer &= ~EFER_SAVE_RESTORE_BITS; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 359 | trans_efer |= msr_efer_save_restore_bits(vmx->guest_msrs[efer_offset]); |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 360 | wrmsrl(MSR_EFER, trans_efer); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 361 | vmx->vcpu.stat.efer_reload++; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 362 | } |
| 363 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 364 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 365 | { |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 366 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 367 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 368 | if (vmx->host_state.loaded) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 369 | return; |
| 370 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 371 | vmx->host_state.loaded = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 372 | /* |
| 373 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not |
| 374 | * allow segment selectors with cpl > 0 or ti == 1. |
| 375 | */ |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 376 | vmx->host_state.ldt_sel = read_ldt(); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 377 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 378 | vmx->host_state.fs_sel = read_fs(); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 379 | if (!(vmx->host_state.fs_sel & 7)) { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 380 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 381 | vmx->host_state.fs_reload_needed = 0; |
| 382 | } else { |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 383 | vmcs_write16(HOST_FS_SELECTOR, 0); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 384 | vmx->host_state.fs_reload_needed = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 385 | } |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 386 | vmx->host_state.gs_sel = read_gs(); |
| 387 | if (!(vmx->host_state.gs_sel & 7)) |
| 388 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 389 | else { |
| 390 | vmcs_write16(HOST_GS_SELECTOR, 0); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 391 | vmx->host_state.gs_ldt_reload_needed = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | #ifdef CONFIG_X86_64 |
| 395 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); |
| 396 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); |
| 397 | #else |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 398 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
| 399 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 400 | #endif |
Avi Kivity | 707c087 | 2007-05-02 17:33:43 +0300 | [diff] [blame] | 401 | |
| 402 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 403 | if (is_long_mode(&vmx->vcpu)) { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 404 | save_msrs(vmx->host_msrs + |
| 405 | vmx->msr_offset_kernel_gs_base, 1); |
Avi Kivity | 707c087 | 2007-05-02 17:33:43 +0300 | [diff] [blame] | 406 | } |
| 407 | #endif |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 408 | load_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 409 | if (msr_efer_need_save_restore(vmx)) |
| 410 | load_transition_efer(vmx); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 411 | } |
| 412 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 413 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 414 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 415 | unsigned long flags; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 416 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 417 | if (!vmx->host_state.loaded) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 418 | return; |
| 419 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 420 | vmx->host_state.loaded = 0; |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 421 | if (vmx->host_state.fs_reload_needed) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 422 | load_fs(vmx->host_state.fs_sel); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 423 | if (vmx->host_state.gs_ldt_reload_needed) { |
| 424 | load_ldt(vmx->host_state.ldt_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 425 | /* |
| 426 | * If we have to reload gs, we must take care to |
| 427 | * preserve our gs base. |
| 428 | */ |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 429 | local_irq_save(flags); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 430 | load_gs(vmx->host_state.gs_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 431 | #ifdef CONFIG_X86_64 |
| 432 | wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE)); |
| 433 | #endif |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 434 | local_irq_restore(flags); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 435 | } |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 436 | reload_tss(); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 437 | save_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
| 438 | load_msrs(vmx->host_msrs, vmx->save_nmsrs); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 439 | if (msr_efer_need_save_restore(vmx)) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 440 | load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 441 | } |
| 442 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 443 | /* |
| 444 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes |
| 445 | * vcpu mutex is already taken. |
| 446 | */ |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 447 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 448 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 449 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 450 | u64 phys_addr = __pa(vmx->vmcs); |
Avi Kivity | 7700270 | 2007-06-13 19:55:28 +0300 | [diff] [blame] | 451 | u64 tsc_this, delta; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 452 | |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 453 | if (vcpu->cpu != cpu) { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 454 | vcpu_clear(vmx); |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 455 | kvm_migrate_apic_timer(vcpu); |
| 456 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 457 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 458 | if (per_cpu(current_vmcs, cpu) != vmx->vmcs) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 459 | u8 error; |
| 460 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 461 | per_cpu(current_vmcs, cpu) = vmx->vmcs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 462 | asm volatile (ASM_VMX_VMPTRLD_RAX "; setna %0" |
| 463 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
| 464 | : "cc"); |
| 465 | if (error) |
| 466 | printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n", |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 467 | vmx->vmcs, phys_addr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | if (vcpu->cpu != cpu) { |
| 471 | struct descriptor_table dt; |
| 472 | unsigned long sysenter_esp; |
| 473 | |
| 474 | vcpu->cpu = cpu; |
| 475 | /* |
| 476 | * Linux uses per-cpu TSS and GDT, so set these when switching |
| 477 | * processors. |
| 478 | */ |
| 479 | vmcs_writel(HOST_TR_BASE, read_tr_base()); /* 22.2.4 */ |
| 480 | get_gdt(&dt); |
| 481 | vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */ |
| 482 | |
| 483 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); |
| 484 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ |
Avi Kivity | 7700270 | 2007-06-13 19:55:28 +0300 | [diff] [blame] | 485 | |
| 486 | /* |
| 487 | * Make sure the time stamp counter is monotonous. |
| 488 | */ |
| 489 | rdtscll(tsc_this); |
| 490 | delta = vcpu->host_tsc - tsc_this; |
| 491 | vmcs_write64(TSC_OFFSET, vmcs_read64(TSC_OFFSET) + delta); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 492 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 493 | } |
| 494 | |
| 495 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) |
| 496 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 497 | vmx_load_host_state(to_vmx(vcpu)); |
Avi Kivity | 7702fd1 | 2007-06-14 16:27:40 +0300 | [diff] [blame] | 498 | kvm_put_guest_fpu(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 499 | } |
| 500 | |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 501 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
| 502 | { |
| 503 | if (vcpu->fpu_active) |
| 504 | return; |
| 505 | vcpu->fpu_active = 1; |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 506 | vmcs_clear_bits(GUEST_CR0, X86_CR0_TS); |
| 507 | if (vcpu->cr0 & X86_CR0_TS) |
| 508 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 509 | update_exception_bitmap(vcpu); |
| 510 | } |
| 511 | |
| 512 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) |
| 513 | { |
| 514 | if (!vcpu->fpu_active) |
| 515 | return; |
| 516 | vcpu->fpu_active = 0; |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 517 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 518 | update_exception_bitmap(vcpu); |
| 519 | } |
| 520 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 521 | static void vmx_vcpu_decache(struct kvm_vcpu *vcpu) |
| 522 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 523 | vcpu_clear(to_vmx(vcpu)); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 524 | } |
| 525 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 526 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
| 527 | { |
| 528 | return vmcs_readl(GUEST_RFLAGS); |
| 529 | } |
| 530 | |
| 531 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
| 532 | { |
Avi Kivity | 78f7826868 | 2007-10-16 19:06:15 +0200 | [diff] [blame] | 533 | if (vcpu->rmode.active) |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 534 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 535 | vmcs_writel(GUEST_RFLAGS, rflags); |
| 536 | } |
| 537 | |
| 538 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
| 539 | { |
| 540 | unsigned long rip; |
| 541 | u32 interruptibility; |
| 542 | |
| 543 | rip = vmcs_readl(GUEST_RIP); |
| 544 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
| 545 | vmcs_writel(GUEST_RIP, rip); |
| 546 | |
| 547 | /* |
| 548 | * We emulated an instruction, so temporary interrupt blocking |
| 549 | * should be removed, if set. |
| 550 | */ |
| 551 | interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); |
| 552 | if (interruptibility & 3) |
| 553 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, |
| 554 | interruptibility & ~3); |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 555 | vcpu->interrupt_window_open = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 556 | } |
| 557 | |
| 558 | static void vmx_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code) |
| 559 | { |
| 560 | printk(KERN_DEBUG "inject_general_protection: rip 0x%lx\n", |
| 561 | vmcs_readl(GUEST_RIP)); |
| 562 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); |
| 563 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 564 | GP_VECTOR | |
| 565 | INTR_TYPE_EXCEPTION | |
| 566 | INTR_INFO_DELIEVER_CODE_MASK | |
| 567 | INTR_INFO_VALID_MASK); |
| 568 | } |
| 569 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 570 | static void vmx_inject_ud(struct kvm_vcpu *vcpu) |
| 571 | { |
| 572 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 573 | UD_VECTOR | |
| 574 | INTR_TYPE_EXCEPTION | |
| 575 | INTR_INFO_VALID_MASK); |
| 576 | } |
| 577 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 578 | /* |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 579 | * Swap MSR entry in host/guest MSR entry array. |
| 580 | */ |
Gabriel C | 54e11fa | 2007-08-01 16:23:10 +0200 | [diff] [blame] | 581 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 582 | static void move_msr_up(struct vcpu_vmx *vmx, int from, int to) |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 583 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 584 | struct kvm_msr_entry tmp; |
| 585 | |
| 586 | tmp = vmx->guest_msrs[to]; |
| 587 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; |
| 588 | vmx->guest_msrs[from] = tmp; |
| 589 | tmp = vmx->host_msrs[to]; |
| 590 | vmx->host_msrs[to] = vmx->host_msrs[from]; |
| 591 | vmx->host_msrs[from] = tmp; |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 592 | } |
Gabriel C | 54e11fa | 2007-08-01 16:23:10 +0200 | [diff] [blame] | 593 | #endif |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 594 | |
| 595 | /* |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 596 | * Set up the vmcs to automatically save and restore system |
| 597 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy |
| 598 | * mode, as fiddling with msrs is very expensive. |
| 599 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 600 | static void setup_msrs(struct vcpu_vmx *vmx) |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 601 | { |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 602 | int save_nmsrs; |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 603 | |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 604 | save_nmsrs = 0; |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 605 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 606 | if (is_long_mode(&vmx->vcpu)) { |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 607 | int index; |
| 608 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 609 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 610 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 611 | move_msr_up(vmx, index, save_nmsrs++); |
| 612 | index = __find_msr_index(vmx, MSR_LSTAR); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 613 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 614 | move_msr_up(vmx, index, save_nmsrs++); |
| 615 | index = __find_msr_index(vmx, MSR_CSTAR); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 616 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 617 | move_msr_up(vmx, index, save_nmsrs++); |
| 618 | index = __find_msr_index(vmx, MSR_KERNEL_GS_BASE); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 619 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 620 | move_msr_up(vmx, index, save_nmsrs++); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 621 | /* |
| 622 | * MSR_K6_STAR is only needed on long mode guests, and only |
| 623 | * if efer.sce is enabled. |
| 624 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 625 | index = __find_msr_index(vmx, MSR_K6_STAR); |
| 626 | if ((index >= 0) && (vmx->vcpu.shadow_efer & EFER_SCE)) |
| 627 | move_msr_up(vmx, index, save_nmsrs++); |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 628 | } |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 629 | #endif |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 630 | vmx->save_nmsrs = save_nmsrs; |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 631 | |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 632 | #ifdef CONFIG_X86_64 |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 633 | vmx->msr_offset_kernel_gs_base = |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 634 | __find_msr_index(vmx, MSR_KERNEL_GS_BASE); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 635 | #endif |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 636 | vmx->msr_offset_efer = __find_msr_index(vmx, MSR_EFER); |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 637 | } |
| 638 | |
| 639 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 640 | * reads and returns guest's timestamp counter "register" |
| 641 | * guest_tsc = host_tsc + tsc_offset -- 21.3 |
| 642 | */ |
| 643 | static u64 guest_read_tsc(void) |
| 644 | { |
| 645 | u64 host_tsc, tsc_offset; |
| 646 | |
| 647 | rdtscll(host_tsc); |
| 648 | tsc_offset = vmcs_read64(TSC_OFFSET); |
| 649 | return host_tsc + tsc_offset; |
| 650 | } |
| 651 | |
| 652 | /* |
| 653 | * writes 'guest_tsc' into guest's timestamp counter "register" |
| 654 | * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc |
| 655 | */ |
| 656 | static void guest_write_tsc(u64 guest_tsc) |
| 657 | { |
| 658 | u64 host_tsc; |
| 659 | |
| 660 | rdtscll(host_tsc); |
| 661 | vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc); |
| 662 | } |
| 663 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 664 | /* |
| 665 | * Reads an msr value (of 'msr_index') into 'pdata'. |
| 666 | * Returns 0 on success, non-0 otherwise. |
| 667 | * Assumes vcpu_load() was already called. |
| 668 | */ |
| 669 | static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
| 670 | { |
| 671 | u64 data; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 672 | struct kvm_msr_entry *msr; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 673 | |
| 674 | if (!pdata) { |
| 675 | printk(KERN_ERR "BUG: get_msr called with NULL pdata\n"); |
| 676 | return -EINVAL; |
| 677 | } |
| 678 | |
| 679 | switch (msr_index) { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 680 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 681 | case MSR_FS_BASE: |
| 682 | data = vmcs_readl(GUEST_FS_BASE); |
| 683 | break; |
| 684 | case MSR_GS_BASE: |
| 685 | data = vmcs_readl(GUEST_GS_BASE); |
| 686 | break; |
| 687 | case MSR_EFER: |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 688 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 689 | #endif |
| 690 | case MSR_IA32_TIME_STAMP_COUNTER: |
| 691 | data = guest_read_tsc(); |
| 692 | break; |
| 693 | case MSR_IA32_SYSENTER_CS: |
| 694 | data = vmcs_read32(GUEST_SYSENTER_CS); |
| 695 | break; |
| 696 | case MSR_IA32_SYSENTER_EIP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 697 | data = vmcs_readl(GUEST_SYSENTER_EIP); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 698 | break; |
| 699 | case MSR_IA32_SYSENTER_ESP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 700 | data = vmcs_readl(GUEST_SYSENTER_ESP); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 701 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 702 | default: |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 703 | msr = find_msr_entry(to_vmx(vcpu), msr_index); |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 704 | if (msr) { |
| 705 | data = msr->data; |
| 706 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 707 | } |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 708 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 709 | } |
| 710 | |
| 711 | *pdata = data; |
| 712 | return 0; |
| 713 | } |
| 714 | |
| 715 | /* |
| 716 | * Writes msr value into into the appropriate "register". |
| 717 | * Returns 0 on success, non-0 otherwise. |
| 718 | * Assumes vcpu_load() was already called. |
| 719 | */ |
| 720 | static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) |
| 721 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 722 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 723 | struct kvm_msr_entry *msr; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 724 | int ret = 0; |
| 725 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 726 | switch (msr_index) { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 727 | #ifdef CONFIG_X86_64 |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 728 | case MSR_EFER: |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 729 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 730 | if (vmx->host_state.loaded) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 731 | load_transition_efer(vmx); |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 732 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 733 | case MSR_FS_BASE: |
| 734 | vmcs_writel(GUEST_FS_BASE, data); |
| 735 | break; |
| 736 | case MSR_GS_BASE: |
| 737 | vmcs_writel(GUEST_GS_BASE, data); |
| 738 | break; |
| 739 | #endif |
| 740 | case MSR_IA32_SYSENTER_CS: |
| 741 | vmcs_write32(GUEST_SYSENTER_CS, data); |
| 742 | break; |
| 743 | case MSR_IA32_SYSENTER_EIP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 744 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 745 | break; |
| 746 | case MSR_IA32_SYSENTER_ESP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 747 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 748 | break; |
Avi Kivity | d27d4ac | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 749 | case MSR_IA32_TIME_STAMP_COUNTER: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 750 | guest_write_tsc(data); |
| 751 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 752 | default: |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 753 | msr = find_msr_entry(vmx, msr_index); |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 754 | if (msr) { |
| 755 | msr->data = data; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 756 | if (vmx->host_state.loaded) |
| 757 | load_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 758 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 759 | } |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 760 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 761 | } |
| 762 | |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 763 | return ret; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | /* |
| 767 | * Sync the rsp and rip registers into the vcpu structure. This allows |
| 768 | * registers to be accessed by indexing vcpu->regs. |
| 769 | */ |
| 770 | static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu) |
| 771 | { |
| 772 | vcpu->regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); |
| 773 | vcpu->rip = vmcs_readl(GUEST_RIP); |
| 774 | } |
| 775 | |
| 776 | /* |
| 777 | * Syncs rsp and rip back into the vmcs. Should be called after possible |
| 778 | * modification. |
| 779 | */ |
| 780 | static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu) |
| 781 | { |
| 782 | vmcs_writel(GUEST_RSP, vcpu->regs[VCPU_REGS_RSP]); |
| 783 | vmcs_writel(GUEST_RIP, vcpu->rip); |
| 784 | } |
| 785 | |
| 786 | static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg) |
| 787 | { |
| 788 | unsigned long dr7 = 0x400; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 789 | int old_singlestep; |
| 790 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 791 | old_singlestep = vcpu->guest_debug.singlestep; |
| 792 | |
| 793 | vcpu->guest_debug.enabled = dbg->enabled; |
| 794 | if (vcpu->guest_debug.enabled) { |
| 795 | int i; |
| 796 | |
| 797 | dr7 |= 0x200; /* exact */ |
| 798 | for (i = 0; i < 4; ++i) { |
| 799 | if (!dbg->breakpoints[i].enabled) |
| 800 | continue; |
| 801 | vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address; |
| 802 | dr7 |= 2 << (i*2); /* global enable */ |
| 803 | dr7 |= 0 << (i*4+16); /* execution breakpoint */ |
| 804 | } |
| 805 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 806 | vcpu->guest_debug.singlestep = dbg->singlestep; |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 807 | } else |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 808 | vcpu->guest_debug.singlestep = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 809 | |
| 810 | if (old_singlestep && !vcpu->guest_debug.singlestep) { |
| 811 | unsigned long flags; |
| 812 | |
| 813 | flags = vmcs_readl(GUEST_RFLAGS); |
| 814 | flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); |
| 815 | vmcs_writel(GUEST_RFLAGS, flags); |
| 816 | } |
| 817 | |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 818 | update_exception_bitmap(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 819 | vmcs_writel(GUEST_DR7, dr7); |
| 820 | |
| 821 | return 0; |
| 822 | } |
| 823 | |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 824 | static int vmx_get_irq(struct kvm_vcpu *vcpu) |
| 825 | { |
| 826 | u32 idtv_info_field; |
| 827 | |
| 828 | idtv_info_field = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
| 829 | if (idtv_info_field & INTR_INFO_VALID_MASK) { |
| 830 | if (is_external_interrupt(idtv_info_field)) |
| 831 | return idtv_info_field & VECTORING_INFO_VECTOR_MASK; |
| 832 | else |
| 833 | printk("pending exception: not handled yet\n"); |
| 834 | } |
| 835 | return -1; |
| 836 | } |
| 837 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 838 | static __init int cpu_has_kvm_support(void) |
| 839 | { |
| 840 | unsigned long ecx = cpuid_ecx(1); |
| 841 | return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */ |
| 842 | } |
| 843 | |
| 844 | static __init int vmx_disabled_by_bios(void) |
| 845 | { |
| 846 | u64 msr; |
| 847 | |
| 848 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); |
Yang, Sheng | 62b3ffb | 2007-07-25 12:17:06 +0300 | [diff] [blame] | 849 | return (msr & (MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 850 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) |
| 851 | == MSR_IA32_FEATURE_CONTROL_LOCKED; |
| 852 | /* locked but not enabled */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 853 | } |
| 854 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 855 | static void hardware_enable(void *garbage) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 856 | { |
| 857 | int cpu = raw_smp_processor_id(); |
| 858 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); |
| 859 | u64 old; |
| 860 | |
| 861 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); |
Yang, Sheng | 62b3ffb | 2007-07-25 12:17:06 +0300 | [diff] [blame] | 862 | if ((old & (MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 863 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) |
| 864 | != (MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 865 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 866 | /* enable and lock */ |
Yang, Sheng | 62b3ffb | 2007-07-25 12:17:06 +0300 | [diff] [blame] | 867 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | |
| 868 | MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 869 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED); |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 870 | write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 871 | asm volatile (ASM_VMX_VMXON_RAX : : "a"(&phys_addr), "m"(phys_addr) |
| 872 | : "memory", "cc"); |
| 873 | } |
| 874 | |
| 875 | static void hardware_disable(void *garbage) |
| 876 | { |
| 877 | asm volatile (ASM_VMX_VMXOFF : : : "cc"); |
| 878 | } |
| 879 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 880 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
| 881 | u32 msr, u32* result) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 882 | { |
| 883 | u32 vmx_msr_low, vmx_msr_high; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 884 | u32 ctl = ctl_min | ctl_opt; |
| 885 | |
| 886 | rdmsr(msr, vmx_msr_low, vmx_msr_high); |
| 887 | |
| 888 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ |
| 889 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ |
| 890 | |
| 891 | /* Ensure minimum (required) set of control bits are supported. */ |
| 892 | if (ctl_min & ~ctl) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 893 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 894 | |
| 895 | *result = ctl; |
| 896 | return 0; |
| 897 | } |
| 898 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 899 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 900 | { |
| 901 | u32 vmx_msr_low, vmx_msr_high; |
| 902 | u32 min, opt; |
| 903 | u32 _pin_based_exec_control = 0; |
| 904 | u32 _cpu_based_exec_control = 0; |
| 905 | u32 _vmexit_control = 0; |
| 906 | u32 _vmentry_control = 0; |
| 907 | |
| 908 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; |
| 909 | opt = 0; |
| 910 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, |
| 911 | &_pin_based_exec_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 912 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 913 | |
| 914 | min = CPU_BASED_HLT_EXITING | |
| 915 | #ifdef CONFIG_X86_64 |
| 916 | CPU_BASED_CR8_LOAD_EXITING | |
| 917 | CPU_BASED_CR8_STORE_EXITING | |
| 918 | #endif |
| 919 | CPU_BASED_USE_IO_BITMAPS | |
| 920 | CPU_BASED_MOV_DR_EXITING | |
| 921 | CPU_BASED_USE_TSC_OFFSETING; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 922 | #ifdef CONFIG_X86_64 |
| 923 | opt = CPU_BASED_TPR_SHADOW; |
| 924 | #else |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 925 | opt = 0; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 926 | #endif |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 927 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
| 928 | &_cpu_based_exec_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 929 | return -EIO; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 930 | #ifdef CONFIG_X86_64 |
| 931 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) |
| 932 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & |
| 933 | ~CPU_BASED_CR8_STORE_EXITING; |
| 934 | #endif |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 935 | |
| 936 | min = 0; |
| 937 | #ifdef CONFIG_X86_64 |
| 938 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; |
| 939 | #endif |
| 940 | opt = 0; |
| 941 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, |
| 942 | &_vmexit_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 943 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 944 | |
| 945 | min = opt = 0; |
| 946 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, |
| 947 | &_vmentry_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 948 | return -EIO; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 949 | |
Nguyen Anh Quynh | c68876f | 2006-12-29 16:49:54 -0800 | [diff] [blame] | 950 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 951 | |
| 952 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ |
| 953 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 954 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 955 | |
| 956 | #ifdef CONFIG_X86_64 |
| 957 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ |
| 958 | if (vmx_msr_high & (1u<<16)) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 959 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 960 | #endif |
| 961 | |
| 962 | /* Require Write-Back (WB) memory type for VMCS accesses. */ |
| 963 | if (((vmx_msr_high >> 18) & 15) != 6) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 964 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 965 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 966 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
| 967 | vmcs_conf->order = get_order(vmcs_config.size); |
| 968 | vmcs_conf->revision_id = vmx_msr_low; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 969 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 970 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
| 971 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; |
| 972 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
| 973 | vmcs_conf->vmentry_ctrl = _vmentry_control; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 974 | |
| 975 | return 0; |
Nguyen Anh Quynh | c68876f | 2006-12-29 16:49:54 -0800 | [diff] [blame] | 976 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 977 | |
| 978 | static struct vmcs *alloc_vmcs_cpu(int cpu) |
| 979 | { |
| 980 | int node = cpu_to_node(cpu); |
| 981 | struct page *pages; |
| 982 | struct vmcs *vmcs; |
| 983 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 984 | pages = alloc_pages_node(node, GFP_KERNEL, vmcs_config.order); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 985 | if (!pages) |
| 986 | return NULL; |
| 987 | vmcs = page_address(pages); |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 988 | memset(vmcs, 0, vmcs_config.size); |
| 989 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 990 | return vmcs; |
| 991 | } |
| 992 | |
| 993 | static struct vmcs *alloc_vmcs(void) |
| 994 | { |
Ingo Molnar | d3b2c33 | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 995 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 996 | } |
| 997 | |
| 998 | static void free_vmcs(struct vmcs *vmcs) |
| 999 | { |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1000 | free_pages((unsigned long)vmcs, vmcs_config.order); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1001 | } |
| 1002 | |
Sam Ravnborg | 3995958 | 2007-06-01 00:47:13 -0700 | [diff] [blame] | 1003 | static void free_kvm_area(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1004 | { |
| 1005 | int cpu; |
| 1006 | |
| 1007 | for_each_online_cpu(cpu) |
| 1008 | free_vmcs(per_cpu(vmxarea, cpu)); |
| 1009 | } |
| 1010 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1011 | static __init int alloc_kvm_area(void) |
| 1012 | { |
| 1013 | int cpu; |
| 1014 | |
| 1015 | for_each_online_cpu(cpu) { |
| 1016 | struct vmcs *vmcs; |
| 1017 | |
| 1018 | vmcs = alloc_vmcs_cpu(cpu); |
| 1019 | if (!vmcs) { |
| 1020 | free_kvm_area(); |
| 1021 | return -ENOMEM; |
| 1022 | } |
| 1023 | |
| 1024 | per_cpu(vmxarea, cpu) = vmcs; |
| 1025 | } |
| 1026 | return 0; |
| 1027 | } |
| 1028 | |
| 1029 | static __init int hardware_setup(void) |
| 1030 | { |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1031 | if (setup_vmcs_config(&vmcs_config) < 0) |
| 1032 | return -EIO; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1033 | return alloc_kvm_area(); |
| 1034 | } |
| 1035 | |
| 1036 | static __exit void hardware_unsetup(void) |
| 1037 | { |
| 1038 | free_kvm_area(); |
| 1039 | } |
| 1040 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1041 | static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save) |
| 1042 | { |
| 1043 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1044 | |
Avi Kivity | 6af11b9 | 2007-03-19 13:18:10 +0200 | [diff] [blame] | 1045 | if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1046 | vmcs_write16(sf->selector, save->selector); |
| 1047 | vmcs_writel(sf->base, save->base); |
| 1048 | vmcs_write32(sf->limit, save->limit); |
| 1049 | vmcs_write32(sf->ar_bytes, save->ar); |
| 1050 | } else { |
| 1051 | u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK) |
| 1052 | << AR_DPL_SHIFT; |
| 1053 | vmcs_write32(sf->ar_bytes, 0x93 | dpl); |
| 1054 | } |
| 1055 | } |
| 1056 | |
| 1057 | static void enter_pmode(struct kvm_vcpu *vcpu) |
| 1058 | { |
| 1059 | unsigned long flags; |
| 1060 | |
| 1061 | vcpu->rmode.active = 0; |
| 1062 | |
| 1063 | vmcs_writel(GUEST_TR_BASE, vcpu->rmode.tr.base); |
| 1064 | vmcs_write32(GUEST_TR_LIMIT, vcpu->rmode.tr.limit); |
| 1065 | vmcs_write32(GUEST_TR_AR_BYTES, vcpu->rmode.tr.ar); |
| 1066 | |
| 1067 | flags = vmcs_readl(GUEST_RFLAGS); |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 1068 | flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1069 | flags |= (vcpu->rmode.save_iopl << IOPL_SHIFT); |
| 1070 | vmcs_writel(GUEST_RFLAGS, flags); |
| 1071 | |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 1072 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
| 1073 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1074 | |
| 1075 | update_exception_bitmap(vcpu); |
| 1076 | |
| 1077 | fix_pmode_dataseg(VCPU_SREG_ES, &vcpu->rmode.es); |
| 1078 | fix_pmode_dataseg(VCPU_SREG_DS, &vcpu->rmode.ds); |
| 1079 | fix_pmode_dataseg(VCPU_SREG_GS, &vcpu->rmode.gs); |
| 1080 | fix_pmode_dataseg(VCPU_SREG_FS, &vcpu->rmode.fs); |
| 1081 | |
| 1082 | vmcs_write16(GUEST_SS_SELECTOR, 0); |
| 1083 | vmcs_write32(GUEST_SS_AR_BYTES, 0x93); |
| 1084 | |
| 1085 | vmcs_write16(GUEST_CS_SELECTOR, |
| 1086 | vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK); |
| 1087 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); |
| 1088 | } |
| 1089 | |
Izik Eidus | 33f5fa1 | 2007-08-19 22:24:58 +0300 | [diff] [blame] | 1090 | static gva_t rmode_tss_base(struct kvm* kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1091 | { |
| 1092 | gfn_t base_gfn = kvm->memslots[0].base_gfn + kvm->memslots[0].npages - 3; |
| 1093 | return base_gfn << PAGE_SHIFT; |
| 1094 | } |
| 1095 | |
| 1096 | static void fix_rmode_seg(int seg, struct kvm_save_segment *save) |
| 1097 | { |
| 1098 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1099 | |
| 1100 | save->selector = vmcs_read16(sf->selector); |
| 1101 | save->base = vmcs_readl(sf->base); |
| 1102 | save->limit = vmcs_read32(sf->limit); |
| 1103 | save->ar = vmcs_read32(sf->ar_bytes); |
| 1104 | vmcs_write16(sf->selector, vmcs_readl(sf->base) >> 4); |
| 1105 | vmcs_write32(sf->limit, 0xffff); |
| 1106 | vmcs_write32(sf->ar_bytes, 0xf3); |
| 1107 | } |
| 1108 | |
| 1109 | static void enter_rmode(struct kvm_vcpu *vcpu) |
| 1110 | { |
| 1111 | unsigned long flags; |
| 1112 | |
| 1113 | vcpu->rmode.active = 1; |
| 1114 | |
| 1115 | vcpu->rmode.tr.base = vmcs_readl(GUEST_TR_BASE); |
| 1116 | vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); |
| 1117 | |
| 1118 | vcpu->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT); |
| 1119 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
| 1120 | |
| 1121 | vcpu->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES); |
| 1122 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
| 1123 | |
| 1124 | flags = vmcs_readl(GUEST_RFLAGS); |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 1125 | vcpu->rmode.save_iopl = (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1126 | |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 1127 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1128 | |
| 1129 | vmcs_writel(GUEST_RFLAGS, flags); |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 1130 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1131 | update_exception_bitmap(vcpu); |
| 1132 | |
| 1133 | vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4); |
| 1134 | vmcs_write32(GUEST_SS_LIMIT, 0xffff); |
| 1135 | vmcs_write32(GUEST_SS_AR_BYTES, 0xf3); |
| 1136 | |
| 1137 | vmcs_write32(GUEST_CS_AR_BYTES, 0xf3); |
Michael Riepe | abacf8d | 2006-12-22 01:05:45 -0800 | [diff] [blame] | 1138 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
Avi Kivity | 8cb5b03 | 2007-03-20 18:40:40 +0200 | [diff] [blame] | 1139 | if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000) |
| 1140 | vmcs_writel(GUEST_CS_BASE, 0xf0000); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1141 | vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4); |
| 1142 | |
| 1143 | fix_rmode_seg(VCPU_SREG_ES, &vcpu->rmode.es); |
| 1144 | fix_rmode_seg(VCPU_SREG_DS, &vcpu->rmode.ds); |
| 1145 | fix_rmode_seg(VCPU_SREG_GS, &vcpu->rmode.gs); |
| 1146 | fix_rmode_seg(VCPU_SREG_FS, &vcpu->rmode.fs); |
Avi Kivity | 75880a0 | 2007-06-20 11:20:04 +0300 | [diff] [blame] | 1147 | |
Eddie Dong | 8668a3c | 2007-10-10 14:26:45 +0800 | [diff] [blame] | 1148 | kvm_mmu_reset_context(vcpu); |
Avi Kivity | 75880a0 | 2007-06-20 11:20:04 +0300 | [diff] [blame] | 1149 | init_rmode_tss(vcpu->kvm); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1150 | } |
| 1151 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1152 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1153 | |
| 1154 | static void enter_lmode(struct kvm_vcpu *vcpu) |
| 1155 | { |
| 1156 | u32 guest_tr_ar; |
| 1157 | |
| 1158 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); |
| 1159 | if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) { |
| 1160 | printk(KERN_DEBUG "%s: tss fixup for long mode. \n", |
| 1161 | __FUNCTION__); |
| 1162 | vmcs_write32(GUEST_TR_AR_BYTES, |
| 1163 | (guest_tr_ar & ~AR_TYPE_MASK) |
| 1164 | | AR_TYPE_BUSY_64_TSS); |
| 1165 | } |
| 1166 | |
| 1167 | vcpu->shadow_efer |= EFER_LMA; |
| 1168 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1169 | find_msr_entry(to_vmx(vcpu), MSR_EFER)->data |= EFER_LMA | EFER_LME; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1170 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1171 | vmcs_read32(VM_ENTRY_CONTROLS) |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1172 | | VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1173 | } |
| 1174 | |
| 1175 | static void exit_lmode(struct kvm_vcpu *vcpu) |
| 1176 | { |
| 1177 | vcpu->shadow_efer &= ~EFER_LMA; |
| 1178 | |
| 1179 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1180 | vmcs_read32(VM_ENTRY_CONTROLS) |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1181 | & ~VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1182 | } |
| 1183 | |
| 1184 | #endif |
| 1185 | |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 1186 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
Avi Kivity | 399badf | 2007-01-05 16:36:38 -0800 | [diff] [blame] | 1187 | { |
Avi Kivity | 399badf | 2007-01-05 16:36:38 -0800 | [diff] [blame] | 1188 | vcpu->cr4 &= KVM_GUEST_CR4_MASK; |
| 1189 | vcpu->cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK; |
| 1190 | } |
| 1191 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1192 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
| 1193 | { |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1194 | vmx_fpu_deactivate(vcpu); |
| 1195 | |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1196 | if (vcpu->rmode.active && (cr0 & X86_CR0_PE)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1197 | enter_pmode(vcpu); |
| 1198 | |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1199 | if (!vcpu->rmode.active && !(cr0 & X86_CR0_PE)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1200 | enter_rmode(vcpu); |
| 1201 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1202 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1203 | if (vcpu->shadow_efer & EFER_LME) { |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1204 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1205 | enter_lmode(vcpu); |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1206 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1207 | exit_lmode(vcpu); |
| 1208 | } |
| 1209 | #endif |
| 1210 | |
| 1211 | vmcs_writel(CR0_READ_SHADOW, cr0); |
| 1212 | vmcs_writel(GUEST_CR0, |
| 1213 | (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON); |
| 1214 | vcpu->cr0 = cr0; |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1215 | |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1216 | if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE)) |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1217 | vmx_fpu_activate(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1218 | } |
| 1219 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1220 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
| 1221 | { |
| 1222 | vmcs_writel(GUEST_CR3, cr3); |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1223 | if (vcpu->cr0 & X86_CR0_PE) |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1224 | vmx_fpu_deactivate(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1225 | } |
| 1226 | |
| 1227 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
| 1228 | { |
| 1229 | vmcs_writel(CR4_READ_SHADOW, cr4); |
| 1230 | vmcs_writel(GUEST_CR4, cr4 | (vcpu->rmode.active ? |
| 1231 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON)); |
| 1232 | vcpu->cr4 = cr4; |
| 1233 | } |
| 1234 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1235 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1236 | |
| 1237 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
| 1238 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1239 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 1240 | struct kvm_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1241 | |
| 1242 | vcpu->shadow_efer = efer; |
| 1243 | if (efer & EFER_LMA) { |
| 1244 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1245 | vmcs_read32(VM_ENTRY_CONTROLS) | |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1246 | VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1247 | msr->data = efer; |
| 1248 | |
| 1249 | } else { |
| 1250 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1251 | vmcs_read32(VM_ENTRY_CONTROLS) & |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1252 | ~VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1253 | |
| 1254 | msr->data = efer & ~EFER_LME; |
| 1255 | } |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1256 | setup_msrs(vmx); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1257 | } |
| 1258 | |
| 1259 | #endif |
| 1260 | |
| 1261 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
| 1262 | { |
| 1263 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1264 | |
| 1265 | return vmcs_readl(sf->base); |
| 1266 | } |
| 1267 | |
| 1268 | static void vmx_get_segment(struct kvm_vcpu *vcpu, |
| 1269 | struct kvm_segment *var, int seg) |
| 1270 | { |
| 1271 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1272 | u32 ar; |
| 1273 | |
| 1274 | var->base = vmcs_readl(sf->base); |
| 1275 | var->limit = vmcs_read32(sf->limit); |
| 1276 | var->selector = vmcs_read16(sf->selector); |
| 1277 | ar = vmcs_read32(sf->ar_bytes); |
| 1278 | if (ar & AR_UNUSABLE_MASK) |
| 1279 | ar = 0; |
| 1280 | var->type = ar & 15; |
| 1281 | var->s = (ar >> 4) & 1; |
| 1282 | var->dpl = (ar >> 5) & 3; |
| 1283 | var->present = (ar >> 7) & 1; |
| 1284 | var->avl = (ar >> 12) & 1; |
| 1285 | var->l = (ar >> 13) & 1; |
| 1286 | var->db = (ar >> 14) & 1; |
| 1287 | var->g = (ar >> 15) & 1; |
| 1288 | var->unusable = (ar >> 16) & 1; |
| 1289 | } |
| 1290 | |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1291 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1292 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1293 | u32 ar; |
| 1294 | |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1295 | if (var->unusable) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1296 | ar = 1 << 16; |
| 1297 | else { |
| 1298 | ar = var->type & 15; |
| 1299 | ar |= (var->s & 1) << 4; |
| 1300 | ar |= (var->dpl & 3) << 5; |
| 1301 | ar |= (var->present & 1) << 7; |
| 1302 | ar |= (var->avl & 1) << 12; |
| 1303 | ar |= (var->l & 1) << 13; |
| 1304 | ar |= (var->db & 1) << 14; |
| 1305 | ar |= (var->g & 1) << 15; |
| 1306 | } |
Uri Lublin | f7fbf1f | 2006-12-13 00:34:00 -0800 | [diff] [blame] | 1307 | if (ar == 0) /* a 0 value means unusable */ |
| 1308 | ar = AR_UNUSABLE_MASK; |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1309 | |
| 1310 | return ar; |
| 1311 | } |
| 1312 | |
| 1313 | static void vmx_set_segment(struct kvm_vcpu *vcpu, |
| 1314 | struct kvm_segment *var, int seg) |
| 1315 | { |
| 1316 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1317 | u32 ar; |
| 1318 | |
| 1319 | if (vcpu->rmode.active && seg == VCPU_SREG_TR) { |
| 1320 | vcpu->rmode.tr.selector = var->selector; |
| 1321 | vcpu->rmode.tr.base = var->base; |
| 1322 | vcpu->rmode.tr.limit = var->limit; |
| 1323 | vcpu->rmode.tr.ar = vmx_segment_access_rights(var); |
| 1324 | return; |
| 1325 | } |
| 1326 | vmcs_writel(sf->base, var->base); |
| 1327 | vmcs_write32(sf->limit, var->limit); |
| 1328 | vmcs_write16(sf->selector, var->selector); |
| 1329 | if (vcpu->rmode.active && var->s) { |
| 1330 | /* |
| 1331 | * Hack real-mode segments into vm86 compatibility. |
| 1332 | */ |
| 1333 | if (var->base == 0xffff0000 && var->selector == 0xf000) |
| 1334 | vmcs_writel(sf->base, 0xf0000); |
| 1335 | ar = 0xf3; |
| 1336 | } else |
| 1337 | ar = vmx_segment_access_rights(var); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1338 | vmcs_write32(sf->ar_bytes, ar); |
| 1339 | } |
| 1340 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1341 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
| 1342 | { |
| 1343 | u32 ar = vmcs_read32(GUEST_CS_AR_BYTES); |
| 1344 | |
| 1345 | *db = (ar >> 14) & 1; |
| 1346 | *l = (ar >> 13) & 1; |
| 1347 | } |
| 1348 | |
| 1349 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1350 | { |
| 1351 | dt->limit = vmcs_read32(GUEST_IDTR_LIMIT); |
| 1352 | dt->base = vmcs_readl(GUEST_IDTR_BASE); |
| 1353 | } |
| 1354 | |
| 1355 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1356 | { |
| 1357 | vmcs_write32(GUEST_IDTR_LIMIT, dt->limit); |
| 1358 | vmcs_writel(GUEST_IDTR_BASE, dt->base); |
| 1359 | } |
| 1360 | |
| 1361 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1362 | { |
| 1363 | dt->limit = vmcs_read32(GUEST_GDTR_LIMIT); |
| 1364 | dt->base = vmcs_readl(GUEST_GDTR_BASE); |
| 1365 | } |
| 1366 | |
| 1367 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1368 | { |
| 1369 | vmcs_write32(GUEST_GDTR_LIMIT, dt->limit); |
| 1370 | vmcs_writel(GUEST_GDTR_BASE, dt->base); |
| 1371 | } |
| 1372 | |
| 1373 | static int init_rmode_tss(struct kvm* kvm) |
| 1374 | { |
| 1375 | struct page *p1, *p2, *p3; |
| 1376 | gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT; |
| 1377 | char *page; |
| 1378 | |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1379 | p1 = gfn_to_page(kvm, fn++); |
| 1380 | p2 = gfn_to_page(kvm, fn++); |
| 1381 | p3 = gfn_to_page(kvm, fn); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1382 | |
| 1383 | if (!p1 || !p2 || !p3) { |
| 1384 | kvm_printf(kvm,"%s: gfn_to_page failed\n", __FUNCTION__); |
| 1385 | return 0; |
| 1386 | } |
| 1387 | |
| 1388 | page = kmap_atomic(p1, KM_USER0); |
Shani Moideen | a3870c4 | 2007-06-11 09:31:33 +0530 | [diff] [blame] | 1389 | clear_page(page); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1390 | *(u16*)(page + 0x66) = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
| 1391 | kunmap_atomic(page, KM_USER0); |
| 1392 | |
| 1393 | page = kmap_atomic(p2, KM_USER0); |
Shani Moideen | a3870c4 | 2007-06-11 09:31:33 +0530 | [diff] [blame] | 1394 | clear_page(page); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1395 | kunmap_atomic(page, KM_USER0); |
| 1396 | |
| 1397 | page = kmap_atomic(p3, KM_USER0); |
Shani Moideen | a3870c4 | 2007-06-11 09:31:33 +0530 | [diff] [blame] | 1398 | clear_page(page); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1399 | *(page + RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1) = ~0; |
| 1400 | kunmap_atomic(page, KM_USER0); |
| 1401 | |
| 1402 | return 1; |
| 1403 | } |
| 1404 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1405 | static void seg_setup(int seg) |
| 1406 | { |
| 1407 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1408 | |
| 1409 | vmcs_write16(sf->selector, 0); |
| 1410 | vmcs_writel(sf->base, 0); |
| 1411 | vmcs_write32(sf->limit, 0xffff); |
| 1412 | vmcs_write32(sf->ar_bytes, 0x93); |
| 1413 | } |
| 1414 | |
| 1415 | /* |
| 1416 | * Sets up the vmcs for emulated real mode. |
| 1417 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1418 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1419 | { |
| 1420 | u32 host_sysenter_cs; |
| 1421 | u32 junk; |
| 1422 | unsigned long a; |
| 1423 | struct descriptor_table dt; |
| 1424 | int i; |
| 1425 | int ret = 0; |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 1426 | unsigned long kvm_vmx_return; |
Eddie Dong | 7017fc3 | 2007-07-18 11:34:57 +0300 | [diff] [blame] | 1427 | u64 msr; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1428 | u32 exec_control; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1429 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1430 | if (!init_rmode_tss(vmx->vcpu.kvm)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1431 | ret = -ENOMEM; |
| 1432 | goto out; |
| 1433 | } |
| 1434 | |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 1435 | vmx->vcpu.rmode.active = 0; |
| 1436 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1437 | vmx->vcpu.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
Eddie Dong | 7017fc3 | 2007-07-18 11:34:57 +0300 | [diff] [blame] | 1438 | set_cr8(&vmx->vcpu, 0); |
| 1439 | msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1440 | if (vmx->vcpu.vcpu_id == 0) |
Eddie Dong | 7017fc3 | 2007-07-18 11:34:57 +0300 | [diff] [blame] | 1441 | msr |= MSR_IA32_APICBASE_BSP; |
| 1442 | kvm_set_apic_base(&vmx->vcpu, msr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1443 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1444 | fx_init(&vmx->vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1445 | |
| 1446 | /* |
| 1447 | * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode |
| 1448 | * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh. |
| 1449 | */ |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 1450 | if (vmx->vcpu.vcpu_id == 0) { |
| 1451 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); |
| 1452 | vmcs_writel(GUEST_CS_BASE, 0x000f0000); |
| 1453 | } else { |
| 1454 | vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.sipi_vector << 8); |
| 1455 | vmcs_writel(GUEST_CS_BASE, vmx->vcpu.sipi_vector << 12); |
| 1456 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1457 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
| 1458 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); |
| 1459 | |
| 1460 | seg_setup(VCPU_SREG_DS); |
| 1461 | seg_setup(VCPU_SREG_ES); |
| 1462 | seg_setup(VCPU_SREG_FS); |
| 1463 | seg_setup(VCPU_SREG_GS); |
| 1464 | seg_setup(VCPU_SREG_SS); |
| 1465 | |
| 1466 | vmcs_write16(GUEST_TR_SELECTOR, 0); |
| 1467 | vmcs_writel(GUEST_TR_BASE, 0); |
| 1468 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); |
| 1469 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
| 1470 | |
| 1471 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); |
| 1472 | vmcs_writel(GUEST_LDTR_BASE, 0); |
| 1473 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); |
| 1474 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); |
| 1475 | |
| 1476 | vmcs_write32(GUEST_SYSENTER_CS, 0); |
| 1477 | vmcs_writel(GUEST_SYSENTER_ESP, 0); |
| 1478 | vmcs_writel(GUEST_SYSENTER_EIP, 0); |
| 1479 | |
| 1480 | vmcs_writel(GUEST_RFLAGS, 0x02); |
He, Qing | c5ec153 | 2007-09-03 17:07:41 +0300 | [diff] [blame] | 1481 | if (vmx->vcpu.vcpu_id == 0) |
| 1482 | vmcs_writel(GUEST_RIP, 0xfff0); |
| 1483 | else |
| 1484 | vmcs_writel(GUEST_RIP, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1485 | vmcs_writel(GUEST_RSP, 0); |
| 1486 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1487 | //todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0 |
| 1488 | vmcs_writel(GUEST_DR7, 0x400); |
| 1489 | |
| 1490 | vmcs_writel(GUEST_GDTR_BASE, 0); |
| 1491 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); |
| 1492 | |
| 1493 | vmcs_writel(GUEST_IDTR_BASE, 0); |
| 1494 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); |
| 1495 | |
| 1496 | vmcs_write32(GUEST_ACTIVITY_STATE, 0); |
| 1497 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); |
| 1498 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); |
| 1499 | |
| 1500 | /* I/O */ |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 1501 | vmcs_write64(IO_BITMAP_A, page_to_phys(vmx_io_bitmap_a)); |
| 1502 | vmcs_write64(IO_BITMAP_B, page_to_phys(vmx_io_bitmap_b)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1503 | |
| 1504 | guest_write_tsc(0); |
| 1505 | |
| 1506 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
| 1507 | |
| 1508 | /* Special registers */ |
| 1509 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); |
| 1510 | |
| 1511 | /* Control */ |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1512 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, |
| 1513 | vmcs_config.pin_based_exec_ctrl); |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1514 | |
| 1515 | exec_control = vmcs_config.cpu_based_exec_ctrl; |
| 1516 | if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { |
| 1517 | exec_control &= ~CPU_BASED_TPR_SHADOW; |
| 1518 | #ifdef CONFIG_X86_64 |
| 1519 | exec_control |= CPU_BASED_CR8_STORE_EXITING | |
| 1520 | CPU_BASED_CR8_LOAD_EXITING; |
| 1521 | #endif |
| 1522 | } |
| 1523 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1524 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1525 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, 0); |
| 1526 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, 0); |
| 1527 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
| 1528 | |
| 1529 | vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */ |
| 1530 | vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */ |
| 1531 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ |
| 1532 | |
| 1533 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ |
| 1534 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
| 1535 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
| 1536 | vmcs_write16(HOST_FS_SELECTOR, read_fs()); /* 22.2.4 */ |
| 1537 | vmcs_write16(HOST_GS_SELECTOR, read_gs()); /* 22.2.4 */ |
| 1538 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1539 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1540 | rdmsrl(MSR_FS_BASE, a); |
| 1541 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ |
| 1542 | rdmsrl(MSR_GS_BASE, a); |
| 1543 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ |
| 1544 | #else |
| 1545 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ |
| 1546 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ |
| 1547 | #endif |
| 1548 | |
| 1549 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ |
| 1550 | |
| 1551 | get_idt(&dt); |
| 1552 | vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */ |
| 1553 | |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 1554 | asm ("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return)); |
| 1555 | vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */ |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 1556 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
| 1557 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); |
| 1558 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1559 | |
| 1560 | rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk); |
| 1561 | vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs); |
| 1562 | rdmsrl(MSR_IA32_SYSENTER_ESP, a); |
| 1563 | vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */ |
| 1564 | rdmsrl(MSR_IA32_SYSENTER_EIP, a); |
| 1565 | vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */ |
| 1566 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1567 | for (i = 0; i < NR_VMX_MSR; ++i) { |
| 1568 | u32 index = vmx_msr_index[i]; |
| 1569 | u32 data_low, data_high; |
| 1570 | u64 data; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 1571 | int j = vmx->nmsrs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1572 | |
| 1573 | if (rdmsr_safe(index, &data_low, &data_high) < 0) |
| 1574 | continue; |
Avi Kivity | 432bd6c | 2007-01-31 23:48:13 -0800 | [diff] [blame] | 1575 | if (wrmsr_safe(index, data_low, data_high) < 0) |
| 1576 | continue; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1577 | data = data_low | ((u64)data_high << 32); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 1578 | vmx->host_msrs[j].index = index; |
| 1579 | vmx->host_msrs[j].reserved = 0; |
| 1580 | vmx->host_msrs[j].data = data; |
| 1581 | vmx->guest_msrs[j] = vmx->host_msrs[j]; |
| 1582 | ++vmx->nmsrs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1583 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1584 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1585 | setup_msrs(vmx); |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 1586 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1587 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1588 | |
| 1589 | /* 22.2.1, 20.8.1 */ |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1590 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl); |
| 1591 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1592 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
| 1593 | |
Michael Riepe | 3b99ab2 | 2006-12-13 00:34:15 -0800 | [diff] [blame] | 1594 | #ifdef CONFIG_X86_64 |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1595 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); |
| 1596 | if (vm_need_tpr_shadow(vmx->vcpu.kvm)) |
| 1597 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, |
| 1598 | page_to_phys(vmx->vcpu.apic->regs_page)); |
| 1599 | vmcs_write32(TPR_THRESHOLD, 0); |
Michael Riepe | 3b99ab2 | 2006-12-13 00:34:15 -0800 | [diff] [blame] | 1600 | #endif |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1601 | |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 1602 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1603 | vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK); |
| 1604 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1605 | vmx->vcpu.cr0 = 0x60000010; |
| 1606 | vmx_set_cr0(&vmx->vcpu, vmx->vcpu.cr0); // enter rmode |
| 1607 | vmx_set_cr4(&vmx->vcpu, 0); |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1608 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1609 | vmx_set_efer(&vmx->vcpu, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1610 | #endif |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1611 | vmx_fpu_activate(&vmx->vcpu); |
| 1612 | update_exception_bitmap(&vmx->vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1613 | |
| 1614 | return 0; |
| 1615 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1616 | out: |
| 1617 | return ret; |
| 1618 | } |
| 1619 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 1620 | static void vmx_vcpu_reset(struct kvm_vcpu *vcpu) |
| 1621 | { |
| 1622 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 1623 | |
| 1624 | vmx_vcpu_setup(vmx); |
| 1625 | } |
| 1626 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1627 | static void inject_rmode_irq(struct kvm_vcpu *vcpu, int irq) |
| 1628 | { |
| 1629 | u16 ent[2]; |
| 1630 | u16 cs; |
| 1631 | u16 ip; |
| 1632 | unsigned long flags; |
| 1633 | unsigned long ss_base = vmcs_readl(GUEST_SS_BASE); |
| 1634 | u16 sp = vmcs_readl(GUEST_RSP); |
| 1635 | u32 ss_limit = vmcs_read32(GUEST_SS_LIMIT); |
| 1636 | |
Eric Sesterhenn / Snakebyte | 3964994 | 2007-04-09 16:15:05 +0200 | [diff] [blame] | 1637 | if (sp > ss_limit || sp < 6 ) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1638 | vcpu_printf(vcpu, "%s: #SS, rsp 0x%lx ss 0x%lx limit 0x%x\n", |
| 1639 | __FUNCTION__, |
| 1640 | vmcs_readl(GUEST_RSP), |
| 1641 | vmcs_readl(GUEST_SS_BASE), |
| 1642 | vmcs_read32(GUEST_SS_LIMIT)); |
| 1643 | return; |
| 1644 | } |
| 1645 | |
Laurent Vivier | e7d5d76 | 2007-07-30 13:41:19 +0300 | [diff] [blame] | 1646 | if (emulator_read_std(irq * sizeof(ent), &ent, sizeof(ent), vcpu) != |
| 1647 | X86EMUL_CONTINUE) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1648 | vcpu_printf(vcpu, "%s: read guest err\n", __FUNCTION__); |
| 1649 | return; |
| 1650 | } |
| 1651 | |
| 1652 | flags = vmcs_readl(GUEST_RFLAGS); |
| 1653 | cs = vmcs_readl(GUEST_CS_BASE) >> 4; |
| 1654 | ip = vmcs_readl(GUEST_RIP); |
| 1655 | |
| 1656 | |
Laurent Vivier | e7d5d76 | 2007-07-30 13:41:19 +0300 | [diff] [blame] | 1657 | if (emulator_write_emulated(ss_base + sp - 2, &flags, 2, vcpu) != X86EMUL_CONTINUE || |
| 1658 | emulator_write_emulated(ss_base + sp - 4, &cs, 2, vcpu) != X86EMUL_CONTINUE || |
| 1659 | emulator_write_emulated(ss_base + sp - 6, &ip, 2, vcpu) != X86EMUL_CONTINUE) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1660 | vcpu_printf(vcpu, "%s: write guest err\n", __FUNCTION__); |
| 1661 | return; |
| 1662 | } |
| 1663 | |
| 1664 | vmcs_writel(GUEST_RFLAGS, flags & |
| 1665 | ~( X86_EFLAGS_IF | X86_EFLAGS_AC | X86_EFLAGS_TF)); |
| 1666 | vmcs_write16(GUEST_CS_SELECTOR, ent[1]) ; |
| 1667 | vmcs_writel(GUEST_CS_BASE, ent[1] << 4); |
| 1668 | vmcs_writel(GUEST_RIP, ent[0]); |
| 1669 | vmcs_writel(GUEST_RSP, (vmcs_readl(GUEST_RSP) & ~0xffff) | (sp - 6)); |
| 1670 | } |
| 1671 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1672 | static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq) |
| 1673 | { |
| 1674 | if (vcpu->rmode.active) { |
| 1675 | inject_rmode_irq(vcpu, irq); |
| 1676 | return; |
| 1677 | } |
| 1678 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 1679 | irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); |
| 1680 | } |
| 1681 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1682 | static void kvm_do_inject_irq(struct kvm_vcpu *vcpu) |
| 1683 | { |
| 1684 | int word_index = __ffs(vcpu->irq_summary); |
| 1685 | int bit_index = __ffs(vcpu->irq_pending[word_index]); |
| 1686 | int irq = word_index * BITS_PER_LONG + bit_index; |
| 1687 | |
| 1688 | clear_bit(bit_index, &vcpu->irq_pending[word_index]); |
| 1689 | if (!vcpu->irq_pending[word_index]) |
| 1690 | clear_bit(word_index, &vcpu->irq_summary); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1691 | vmx_inject_irq(vcpu, irq); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1692 | } |
| 1693 | |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1694 | |
| 1695 | static void do_interrupt_requests(struct kvm_vcpu *vcpu, |
| 1696 | struct kvm_run *kvm_run) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1697 | { |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1698 | u32 cpu_based_vm_exec_control; |
| 1699 | |
| 1700 | vcpu->interrupt_window_open = |
| 1701 | ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
| 1702 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); |
| 1703 | |
| 1704 | if (vcpu->interrupt_window_open && |
| 1705 | vcpu->irq_summary && |
| 1706 | !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1707 | /* |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1708 | * If interrupts enabled, and not blocked by sti or mov ss. Good. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1709 | */ |
| 1710 | kvm_do_inject_irq(vcpu); |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1711 | |
| 1712 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 1713 | if (!vcpu->interrupt_window_open && |
| 1714 | (vcpu->irq_summary || kvm_run->request_interrupt_window)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1715 | /* |
| 1716 | * Interrupts blocked. Wait for unblock. |
| 1717 | */ |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1718 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; |
| 1719 | else |
| 1720 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; |
| 1721 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1722 | } |
| 1723 | |
| 1724 | static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu) |
| 1725 | { |
| 1726 | struct kvm_guest_debug *dbg = &vcpu->guest_debug; |
| 1727 | |
| 1728 | set_debugreg(dbg->bp[0], 0); |
| 1729 | set_debugreg(dbg->bp[1], 1); |
| 1730 | set_debugreg(dbg->bp[2], 2); |
| 1731 | set_debugreg(dbg->bp[3], 3); |
| 1732 | |
| 1733 | if (dbg->singlestep) { |
| 1734 | unsigned long flags; |
| 1735 | |
| 1736 | flags = vmcs_readl(GUEST_RFLAGS); |
| 1737 | flags |= X86_EFLAGS_TF | X86_EFLAGS_RF; |
| 1738 | vmcs_writel(GUEST_RFLAGS, flags); |
| 1739 | } |
| 1740 | } |
| 1741 | |
| 1742 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, |
| 1743 | int vec, u32 err_code) |
| 1744 | { |
| 1745 | if (!vcpu->rmode.active) |
| 1746 | return 0; |
| 1747 | |
Nitin A Kamble | b3f3770 | 2007-05-17 15:50:34 +0300 | [diff] [blame] | 1748 | /* |
| 1749 | * Instruction with address size override prefix opcode 0x67 |
| 1750 | * Cause the #SS fault with 0 error code in VM86 mode. |
| 1751 | */ |
| 1752 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) |
Laurent Vivier | 3427318 | 2007-09-18 11:27:37 +0200 | [diff] [blame^] | 1753 | if (emulate_instruction(vcpu, NULL, 0, 0, 0) == EMULATE_DONE) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1754 | return 1; |
| 1755 | return 0; |
| 1756 | } |
| 1757 | |
| 1758 | static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1759 | { |
| 1760 | u32 intr_info, error_code; |
| 1761 | unsigned long cr2, rip; |
| 1762 | u32 vect_info; |
| 1763 | enum emulation_result er; |
Avi Kivity | e2dec93 | 2007-01-05 16:36:54 -0800 | [diff] [blame] | 1764 | int r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1765 | |
| 1766 | vect_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
| 1767 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
| 1768 | |
| 1769 | if ((vect_info & VECTORING_INFO_VALID_MASK) && |
| 1770 | !is_page_fault(intr_info)) { |
| 1771 | printk(KERN_ERR "%s: unexpected, vectoring info 0x%x " |
| 1772 | "intr info 0x%x\n", __FUNCTION__, vect_info, intr_info); |
| 1773 | } |
| 1774 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1775 | if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1776 | int irq = vect_info & VECTORING_INFO_VECTOR_MASK; |
| 1777 | set_bit(irq, vcpu->irq_pending); |
| 1778 | set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary); |
| 1779 | } |
| 1780 | |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 1781 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ |
| 1782 | return 1; /* already handled by vmx_vcpu_run() */ |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 1783 | |
| 1784 | if (is_no_device(intr_info)) { |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1785 | vmx_fpu_activate(vcpu); |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 1786 | return 1; |
| 1787 | } |
| 1788 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 1789 | if (is_invalid_opcode(intr_info)) { |
Laurent Vivier | 3427318 | 2007-09-18 11:27:37 +0200 | [diff] [blame^] | 1790 | er = emulate_instruction(vcpu, kvm_run, 0, 0, 0); |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 1791 | if (er != EMULATE_DONE) |
| 1792 | vmx_inject_ud(vcpu); |
| 1793 | |
| 1794 | return 1; |
| 1795 | } |
| 1796 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1797 | error_code = 0; |
| 1798 | rip = vmcs_readl(GUEST_RIP); |
| 1799 | if (intr_info & INTR_INFO_DELIEVER_CODE_MASK) |
| 1800 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
| 1801 | if (is_page_fault(intr_info)) { |
| 1802 | cr2 = vmcs_readl(EXIT_QUALIFICATION); |
| 1803 | |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 1804 | mutex_lock(&vcpu->kvm->lock); |
Avi Kivity | e2dec93 | 2007-01-05 16:36:54 -0800 | [diff] [blame] | 1805 | r = kvm_mmu_page_fault(vcpu, cr2, error_code); |
| 1806 | if (r < 0) { |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 1807 | mutex_unlock(&vcpu->kvm->lock); |
Avi Kivity | e2dec93 | 2007-01-05 16:36:54 -0800 | [diff] [blame] | 1808 | return r; |
| 1809 | } |
| 1810 | if (!r) { |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 1811 | mutex_unlock(&vcpu->kvm->lock); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1812 | return 1; |
| 1813 | } |
| 1814 | |
Laurent Vivier | 3427318 | 2007-09-18 11:27:37 +0200 | [diff] [blame^] | 1815 | er = emulate_instruction(vcpu, kvm_run, cr2, error_code, 0); |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 1816 | mutex_unlock(&vcpu->kvm->lock); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1817 | |
| 1818 | switch (er) { |
| 1819 | case EMULATE_DONE: |
| 1820 | return 1; |
| 1821 | case EMULATE_DO_MMIO: |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1822 | ++vcpu->stat.mmio_exits; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1823 | return 0; |
| 1824 | case EMULATE_FAIL: |
Avi Kivity | 054b136 | 2007-09-12 13:21:09 +0300 | [diff] [blame] | 1825 | kvm_report_emulation_failure(vcpu, "pagetable"); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1826 | break; |
| 1827 | default: |
| 1828 | BUG(); |
| 1829 | } |
| 1830 | } |
| 1831 | |
| 1832 | if (vcpu->rmode.active && |
| 1833 | handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK, |
Avi Kivity | 72d6e5a | 2007-06-05 16:15:51 +0300 | [diff] [blame] | 1834 | error_code)) { |
| 1835 | if (vcpu->halt_request) { |
| 1836 | vcpu->halt_request = 0; |
| 1837 | return kvm_emulate_halt(vcpu); |
| 1838 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1839 | return 1; |
Avi Kivity | 72d6e5a | 2007-06-05 16:15:51 +0300 | [diff] [blame] | 1840 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1841 | |
| 1842 | if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) == (INTR_TYPE_EXCEPTION | 1)) { |
| 1843 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
| 1844 | return 0; |
| 1845 | } |
| 1846 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; |
| 1847 | kvm_run->ex.exception = intr_info & INTR_INFO_VECTOR_MASK; |
| 1848 | kvm_run->ex.error_code = error_code; |
| 1849 | return 0; |
| 1850 | } |
| 1851 | |
| 1852 | static int handle_external_interrupt(struct kvm_vcpu *vcpu, |
| 1853 | struct kvm_run *kvm_run) |
| 1854 | { |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1855 | ++vcpu->stat.irq_exits; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1856 | return 1; |
| 1857 | } |
| 1858 | |
Avi Kivity | 988ad74 | 2007-02-12 00:54:36 -0800 | [diff] [blame] | 1859 | static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1860 | { |
| 1861 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; |
| 1862 | return 0; |
| 1863 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1864 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1865 | static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1866 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1867 | unsigned long exit_qualification; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1868 | int size, down, in, string, rep; |
| 1869 | unsigned port; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1870 | |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1871 | ++vcpu->stat.io_exits; |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1872 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1873 | string = (exit_qualification & 16) != 0; |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 1874 | |
| 1875 | if (string) { |
Laurent Vivier | 3427318 | 2007-09-18 11:27:37 +0200 | [diff] [blame^] | 1876 | if (emulate_instruction(vcpu, |
| 1877 | kvm_run, 0, 0, 0) == EMULATE_DO_MMIO) |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 1878 | return 0; |
| 1879 | return 1; |
| 1880 | } |
| 1881 | |
| 1882 | size = (exit_qualification & 7) + 1; |
| 1883 | in = (exit_qualification & 8) != 0; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1884 | down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1885 | rep = (exit_qualification & 32) != 0; |
| 1886 | port = exit_qualification >> 16; |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 1887 | |
Laurent Vivier | 3090dd7 | 2007-08-05 10:43:32 +0300 | [diff] [blame] | 1888 | return kvm_emulate_pio(vcpu, kvm_run, in, size, port); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1889 | } |
| 1890 | |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 1891 | static void |
| 1892 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) |
| 1893 | { |
| 1894 | /* |
| 1895 | * Patch in the VMCALL instruction: |
| 1896 | */ |
| 1897 | hypercall[0] = 0x0f; |
| 1898 | hypercall[1] = 0x01; |
| 1899 | hypercall[2] = 0xc1; |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 1900 | } |
| 1901 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1902 | static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1903 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1904 | unsigned long exit_qualification; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1905 | int cr; |
| 1906 | int reg; |
| 1907 | |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1908 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1909 | cr = exit_qualification & 15; |
| 1910 | reg = (exit_qualification >> 8) & 15; |
| 1911 | switch ((exit_qualification >> 4) & 3) { |
| 1912 | case 0: /* mov to cr */ |
| 1913 | switch (cr) { |
| 1914 | case 0: |
| 1915 | vcpu_load_rsp_rip(vcpu); |
| 1916 | set_cr0(vcpu, vcpu->regs[reg]); |
| 1917 | skip_emulated_instruction(vcpu); |
| 1918 | return 1; |
| 1919 | case 3: |
| 1920 | vcpu_load_rsp_rip(vcpu); |
| 1921 | set_cr3(vcpu, vcpu->regs[reg]); |
| 1922 | skip_emulated_instruction(vcpu); |
| 1923 | return 1; |
| 1924 | case 4: |
| 1925 | vcpu_load_rsp_rip(vcpu); |
| 1926 | set_cr4(vcpu, vcpu->regs[reg]); |
| 1927 | skip_emulated_instruction(vcpu); |
| 1928 | return 1; |
| 1929 | case 8: |
| 1930 | vcpu_load_rsp_rip(vcpu); |
| 1931 | set_cr8(vcpu, vcpu->regs[reg]); |
| 1932 | skip_emulated_instruction(vcpu); |
Yang, Sheng | 253abde | 2007-08-16 13:01:00 +0300 | [diff] [blame] | 1933 | kvm_run->exit_reason = KVM_EXIT_SET_TPR; |
| 1934 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1935 | }; |
| 1936 | break; |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 1937 | case 2: /* clts */ |
| 1938 | vcpu_load_rsp_rip(vcpu); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1939 | vmx_fpu_deactivate(vcpu); |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1940 | vcpu->cr0 &= ~X86_CR0_TS; |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 1941 | vmcs_writel(CR0_READ_SHADOW, vcpu->cr0); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1942 | vmx_fpu_activate(vcpu); |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 1943 | skip_emulated_instruction(vcpu); |
| 1944 | return 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1945 | case 1: /*mov from cr*/ |
| 1946 | switch (cr) { |
| 1947 | case 3: |
| 1948 | vcpu_load_rsp_rip(vcpu); |
| 1949 | vcpu->regs[reg] = vcpu->cr3; |
| 1950 | vcpu_put_rsp_rip(vcpu); |
| 1951 | skip_emulated_instruction(vcpu); |
| 1952 | return 1; |
| 1953 | case 8: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1954 | vcpu_load_rsp_rip(vcpu); |
Eddie Dong | 7017fc3 | 2007-07-18 11:34:57 +0300 | [diff] [blame] | 1955 | vcpu->regs[reg] = get_cr8(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1956 | vcpu_put_rsp_rip(vcpu); |
| 1957 | skip_emulated_instruction(vcpu); |
| 1958 | return 1; |
| 1959 | } |
| 1960 | break; |
| 1961 | case 3: /* lmsw */ |
| 1962 | lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f); |
| 1963 | |
| 1964 | skip_emulated_instruction(vcpu); |
| 1965 | return 1; |
| 1966 | default: |
| 1967 | break; |
| 1968 | } |
| 1969 | kvm_run->exit_reason = 0; |
Rusty Russell | f024247 | 2007-08-01 10:48:02 +1000 | [diff] [blame] | 1970 | pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1971 | (int)(exit_qualification >> 4) & 3, cr); |
| 1972 | return 0; |
| 1973 | } |
| 1974 | |
| 1975 | static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1976 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1977 | unsigned long exit_qualification; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1978 | unsigned long val; |
| 1979 | int dr, reg; |
| 1980 | |
| 1981 | /* |
| 1982 | * FIXME: this code assumes the host is debugging the guest. |
| 1983 | * need to deal with guest debugging itself too. |
| 1984 | */ |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1985 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1986 | dr = exit_qualification & 7; |
| 1987 | reg = (exit_qualification >> 8) & 15; |
| 1988 | vcpu_load_rsp_rip(vcpu); |
| 1989 | if (exit_qualification & 16) { |
| 1990 | /* mov from dr */ |
| 1991 | switch (dr) { |
| 1992 | case 6: |
| 1993 | val = 0xffff0ff0; |
| 1994 | break; |
| 1995 | case 7: |
| 1996 | val = 0x400; |
| 1997 | break; |
| 1998 | default: |
| 1999 | val = 0; |
| 2000 | } |
| 2001 | vcpu->regs[reg] = val; |
| 2002 | } else { |
| 2003 | /* mov to dr */ |
| 2004 | } |
| 2005 | vcpu_put_rsp_rip(vcpu); |
| 2006 | skip_emulated_instruction(vcpu); |
| 2007 | return 1; |
| 2008 | } |
| 2009 | |
| 2010 | static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2011 | { |
Avi Kivity | 06465c5 | 2007-02-28 20:46:53 +0200 | [diff] [blame] | 2012 | kvm_emulate_cpuid(vcpu); |
| 2013 | return 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2014 | } |
| 2015 | |
| 2016 | static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2017 | { |
| 2018 | u32 ecx = vcpu->regs[VCPU_REGS_RCX]; |
| 2019 | u64 data; |
| 2020 | |
| 2021 | if (vmx_get_msr(vcpu, ecx, &data)) { |
| 2022 | vmx_inject_gp(vcpu, 0); |
| 2023 | return 1; |
| 2024 | } |
| 2025 | |
| 2026 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
| 2027 | vcpu->regs[VCPU_REGS_RAX] = data & -1u; |
| 2028 | vcpu->regs[VCPU_REGS_RDX] = (data >> 32) & -1u; |
| 2029 | skip_emulated_instruction(vcpu); |
| 2030 | return 1; |
| 2031 | } |
| 2032 | |
| 2033 | static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2034 | { |
| 2035 | u32 ecx = vcpu->regs[VCPU_REGS_RCX]; |
| 2036 | u64 data = (vcpu->regs[VCPU_REGS_RAX] & -1u) |
| 2037 | | ((u64)(vcpu->regs[VCPU_REGS_RDX] & -1u) << 32); |
| 2038 | |
| 2039 | if (vmx_set_msr(vcpu, ecx, data) != 0) { |
| 2040 | vmx_inject_gp(vcpu, 0); |
| 2041 | return 1; |
| 2042 | } |
| 2043 | |
| 2044 | skip_emulated_instruction(vcpu); |
| 2045 | return 1; |
| 2046 | } |
| 2047 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2048 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu, |
| 2049 | struct kvm_run *kvm_run) |
| 2050 | { |
| 2051 | return 1; |
| 2052 | } |
| 2053 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2054 | static int handle_interrupt_window(struct kvm_vcpu *vcpu, |
| 2055 | struct kvm_run *kvm_run) |
| 2056 | { |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2057 | u32 cpu_based_vm_exec_control; |
| 2058 | |
| 2059 | /* clear pending irq */ |
| 2060 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 2061 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; |
| 2062 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2063 | /* |
| 2064 | * If the user space waits to inject interrupts, exit as soon as |
| 2065 | * possible |
| 2066 | */ |
| 2067 | if (kvm_run->request_interrupt_window && |
Dor Laor | 022a930 | 2007-01-05 16:37:00 -0800 | [diff] [blame] | 2068 | !vcpu->irq_summary) { |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2069 | kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2070 | ++vcpu->stat.irq_window_exits; |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2071 | return 0; |
| 2072 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2073 | return 1; |
| 2074 | } |
| 2075 | |
| 2076 | static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2077 | { |
| 2078 | skip_emulated_instruction(vcpu); |
Avi Kivity | d3bef15 | 2007-06-05 15:53:05 +0300 | [diff] [blame] | 2079 | return kvm_emulate_halt(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2080 | } |
| 2081 | |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2082 | static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2083 | { |
Dor Laor | 510043d | 2007-02-19 18:25:43 +0200 | [diff] [blame] | 2084 | skip_emulated_instruction(vcpu); |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 2085 | kvm_emulate_hypercall(vcpu); |
| 2086 | return 1; |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2087 | } |
| 2088 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2089 | /* |
| 2090 | * The exit handlers return 1 if the exit was handled fully and guest execution |
| 2091 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs |
| 2092 | * to be done to userspace and return 0. |
| 2093 | */ |
| 2094 | static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu, |
| 2095 | struct kvm_run *kvm_run) = { |
| 2096 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, |
| 2097 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, |
Avi Kivity | 988ad74 | 2007-02-12 00:54:36 -0800 | [diff] [blame] | 2098 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2099 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2100 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
| 2101 | [EXIT_REASON_DR_ACCESS] = handle_dr, |
| 2102 | [EXIT_REASON_CPUID] = handle_cpuid, |
| 2103 | [EXIT_REASON_MSR_READ] = handle_rdmsr, |
| 2104 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, |
| 2105 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, |
| 2106 | [EXIT_REASON_HLT] = handle_halt, |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2107 | [EXIT_REASON_VMCALL] = handle_vmcall, |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2108 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2109 | }; |
| 2110 | |
| 2111 | static const int kvm_vmx_max_exit_handlers = |
Robert P. J. Day | 50a3485 | 2007-06-03 13:35:29 -0400 | [diff] [blame] | 2112 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2113 | |
| 2114 | /* |
| 2115 | * The guest has exited. See if we can fix it or if we need userspace |
| 2116 | * assistance. |
| 2117 | */ |
| 2118 | static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
| 2119 | { |
| 2120 | u32 vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
| 2121 | u32 exit_reason = vmcs_read32(VM_EXIT_REASON); |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 2122 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 2123 | |
| 2124 | if (unlikely(vmx->fail)) { |
| 2125 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
| 2126 | kvm_run->fail_entry.hardware_entry_failure_reason |
| 2127 | = vmcs_read32(VM_INSTRUCTION_ERROR); |
| 2128 | return 0; |
| 2129 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2130 | |
| 2131 | if ( (vectoring_info & VECTORING_INFO_VALID_MASK) && |
| 2132 | exit_reason != EXIT_REASON_EXCEPTION_NMI ) |
| 2133 | printk(KERN_WARNING "%s: unexpected, valid vectoring info and " |
| 2134 | "exit reason is 0x%x\n", __FUNCTION__, exit_reason); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2135 | if (exit_reason < kvm_vmx_max_exit_handlers |
| 2136 | && kvm_vmx_exit_handlers[exit_reason]) |
| 2137 | return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run); |
| 2138 | else { |
| 2139 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; |
| 2140 | kvm_run->hw.hardware_exit_reason = exit_reason; |
| 2141 | } |
| 2142 | return 0; |
| 2143 | } |
| 2144 | |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 2145 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
| 2146 | { |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 2147 | } |
| 2148 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2149 | static void update_tpr_threshold(struct kvm_vcpu *vcpu) |
| 2150 | { |
| 2151 | int max_irr, tpr; |
| 2152 | |
| 2153 | if (!vm_need_tpr_shadow(vcpu->kvm)) |
| 2154 | return; |
| 2155 | |
| 2156 | if (!kvm_lapic_enabled(vcpu) || |
| 2157 | ((max_irr = kvm_lapic_find_highest_irr(vcpu)) == -1)) { |
| 2158 | vmcs_write32(TPR_THRESHOLD, 0); |
| 2159 | return; |
| 2160 | } |
| 2161 | |
| 2162 | tpr = (kvm_lapic_get_cr8(vcpu) & 0x0f) << 4; |
| 2163 | vmcs_write32(TPR_THRESHOLD, (max_irr > tpr) ? tpr >> 4 : max_irr >> 4); |
| 2164 | } |
| 2165 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2166 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
| 2167 | { |
| 2168 | u32 cpu_based_vm_exec_control; |
| 2169 | |
| 2170 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 2171 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; |
| 2172 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
| 2173 | } |
| 2174 | |
| 2175 | static void vmx_intr_assist(struct kvm_vcpu *vcpu) |
| 2176 | { |
| 2177 | u32 idtv_info_field, intr_info_field; |
| 2178 | int has_ext_irq, interrupt_window_open; |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2179 | int vector; |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2180 | |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2181 | kvm_inject_pending_timer_irqs(vcpu); |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2182 | update_tpr_threshold(vcpu); |
| 2183 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2184 | has_ext_irq = kvm_cpu_has_interrupt(vcpu); |
| 2185 | intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD); |
| 2186 | idtv_info_field = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
| 2187 | if (intr_info_field & INTR_INFO_VALID_MASK) { |
| 2188 | if (idtv_info_field & INTR_INFO_VALID_MASK) { |
| 2189 | /* TODO: fault when IDT_Vectoring */ |
| 2190 | printk(KERN_ERR "Fault when IDT_Vectoring\n"); |
| 2191 | } |
| 2192 | if (has_ext_irq) |
| 2193 | enable_irq_window(vcpu); |
| 2194 | return; |
| 2195 | } |
| 2196 | if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) { |
| 2197 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field); |
| 2198 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, |
| 2199 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN)); |
| 2200 | |
| 2201 | if (unlikely(idtv_info_field & INTR_INFO_DELIEVER_CODE_MASK)) |
| 2202 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, |
| 2203 | vmcs_read32(IDT_VECTORING_ERROR_CODE)); |
| 2204 | if (unlikely(has_ext_irq)) |
| 2205 | enable_irq_window(vcpu); |
| 2206 | return; |
| 2207 | } |
| 2208 | if (!has_ext_irq) |
| 2209 | return; |
| 2210 | interrupt_window_open = |
| 2211 | ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
| 2212 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2213 | if (interrupt_window_open) { |
| 2214 | vector = kvm_cpu_get_interrupt(vcpu); |
| 2215 | vmx_inject_irq(vcpu, vector); |
| 2216 | kvm_timer_intr_post(vcpu, vector); |
| 2217 | } else |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2218 | enable_irq_window(vcpu); |
| 2219 | } |
| 2220 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2221 | static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2222 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2223 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 2224 | u32 intr_info; |
Avi Kivity | e6adf28 | 2007-04-30 16:07:54 +0300 | [diff] [blame] | 2225 | |
| 2226 | /* |
| 2227 | * Loading guest fpu may have cleared host cr0.ts |
| 2228 | */ |
| 2229 | vmcs_writel(HOST_CR0, read_cr0()); |
| 2230 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2231 | asm ( |
| 2232 | /* Store host registers */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2233 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2234 | "push %%rax; push %%rbx; push %%rdx;" |
| 2235 | "push %%rsi; push %%rdi; push %%rbp;" |
| 2236 | "push %%r8; push %%r9; push %%r10; push %%r11;" |
| 2237 | "push %%r12; push %%r13; push %%r14; push %%r15;" |
| 2238 | "push %%rcx \n\t" |
| 2239 | ASM_VMX_VMWRITE_RSP_RDX "\n\t" |
| 2240 | #else |
| 2241 | "pusha; push %%ecx \n\t" |
| 2242 | ASM_VMX_VMWRITE_RSP_RDX "\n\t" |
| 2243 | #endif |
| 2244 | /* Check if vmlaunch of vmresume is needed */ |
| 2245 | "cmp $0, %1 \n\t" |
| 2246 | /* Load guest registers. Don't clobber flags. */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2247 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2248 | "mov %c[cr2](%3), %%rax \n\t" |
| 2249 | "mov %%rax, %%cr2 \n\t" |
| 2250 | "mov %c[rax](%3), %%rax \n\t" |
| 2251 | "mov %c[rbx](%3), %%rbx \n\t" |
| 2252 | "mov %c[rdx](%3), %%rdx \n\t" |
| 2253 | "mov %c[rsi](%3), %%rsi \n\t" |
| 2254 | "mov %c[rdi](%3), %%rdi \n\t" |
| 2255 | "mov %c[rbp](%3), %%rbp \n\t" |
| 2256 | "mov %c[r8](%3), %%r8 \n\t" |
| 2257 | "mov %c[r9](%3), %%r9 \n\t" |
| 2258 | "mov %c[r10](%3), %%r10 \n\t" |
| 2259 | "mov %c[r11](%3), %%r11 \n\t" |
| 2260 | "mov %c[r12](%3), %%r12 \n\t" |
| 2261 | "mov %c[r13](%3), %%r13 \n\t" |
| 2262 | "mov %c[r14](%3), %%r14 \n\t" |
| 2263 | "mov %c[r15](%3), %%r15 \n\t" |
| 2264 | "mov %c[rcx](%3), %%rcx \n\t" /* kills %3 (rcx) */ |
| 2265 | #else |
| 2266 | "mov %c[cr2](%3), %%eax \n\t" |
| 2267 | "mov %%eax, %%cr2 \n\t" |
| 2268 | "mov %c[rax](%3), %%eax \n\t" |
| 2269 | "mov %c[rbx](%3), %%ebx \n\t" |
| 2270 | "mov %c[rdx](%3), %%edx \n\t" |
| 2271 | "mov %c[rsi](%3), %%esi \n\t" |
| 2272 | "mov %c[rdi](%3), %%edi \n\t" |
| 2273 | "mov %c[rbp](%3), %%ebp \n\t" |
| 2274 | "mov %c[rcx](%3), %%ecx \n\t" /* kills %3 (ecx) */ |
| 2275 | #endif |
| 2276 | /* Enter guest mode */ |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 2277 | "jne .Llaunched \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2278 | ASM_VMX_VMLAUNCH "\n\t" |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 2279 | "jmp .Lkvm_vmx_return \n\t" |
| 2280 | ".Llaunched: " ASM_VMX_VMRESUME "\n\t" |
| 2281 | ".Lkvm_vmx_return: " |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2282 | /* Save guest registers, load host registers, keep flags */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2283 | #ifdef CONFIG_X86_64 |
Ingo Molnar | 9695823 | 2007-02-12 00:54:33 -0800 | [diff] [blame] | 2284 | "xchg %3, (%%rsp) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2285 | "mov %%rax, %c[rax](%3) \n\t" |
| 2286 | "mov %%rbx, %c[rbx](%3) \n\t" |
Ingo Molnar | 9695823 | 2007-02-12 00:54:33 -0800 | [diff] [blame] | 2287 | "pushq (%%rsp); popq %c[rcx](%3) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2288 | "mov %%rdx, %c[rdx](%3) \n\t" |
| 2289 | "mov %%rsi, %c[rsi](%3) \n\t" |
| 2290 | "mov %%rdi, %c[rdi](%3) \n\t" |
| 2291 | "mov %%rbp, %c[rbp](%3) \n\t" |
| 2292 | "mov %%r8, %c[r8](%3) \n\t" |
| 2293 | "mov %%r9, %c[r9](%3) \n\t" |
| 2294 | "mov %%r10, %c[r10](%3) \n\t" |
| 2295 | "mov %%r11, %c[r11](%3) \n\t" |
| 2296 | "mov %%r12, %c[r12](%3) \n\t" |
| 2297 | "mov %%r13, %c[r13](%3) \n\t" |
| 2298 | "mov %%r14, %c[r14](%3) \n\t" |
| 2299 | "mov %%r15, %c[r15](%3) \n\t" |
| 2300 | "mov %%cr2, %%rax \n\t" |
| 2301 | "mov %%rax, %c[cr2](%3) \n\t" |
Ingo Molnar | 9695823 | 2007-02-12 00:54:33 -0800 | [diff] [blame] | 2302 | "mov (%%rsp), %3 \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2303 | |
| 2304 | "pop %%rcx; pop %%r15; pop %%r14; pop %%r13; pop %%r12;" |
| 2305 | "pop %%r11; pop %%r10; pop %%r9; pop %%r8;" |
| 2306 | "pop %%rbp; pop %%rdi; pop %%rsi;" |
| 2307 | "pop %%rdx; pop %%rbx; pop %%rax \n\t" |
| 2308 | #else |
Ingo Molnar | 9695823 | 2007-02-12 00:54:33 -0800 | [diff] [blame] | 2309 | "xchg %3, (%%esp) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2310 | "mov %%eax, %c[rax](%3) \n\t" |
| 2311 | "mov %%ebx, %c[rbx](%3) \n\t" |
Ingo Molnar | 9695823 | 2007-02-12 00:54:33 -0800 | [diff] [blame] | 2312 | "pushl (%%esp); popl %c[rcx](%3) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2313 | "mov %%edx, %c[rdx](%3) \n\t" |
| 2314 | "mov %%esi, %c[rsi](%3) \n\t" |
| 2315 | "mov %%edi, %c[rdi](%3) \n\t" |
| 2316 | "mov %%ebp, %c[rbp](%3) \n\t" |
| 2317 | "mov %%cr2, %%eax \n\t" |
| 2318 | "mov %%eax, %c[cr2](%3) \n\t" |
Ingo Molnar | 9695823 | 2007-02-12 00:54:33 -0800 | [diff] [blame] | 2319 | "mov (%%esp), %3 \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2320 | |
| 2321 | "pop %%ecx; popa \n\t" |
| 2322 | #endif |
| 2323 | "setbe %0 \n\t" |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 2324 | : "=q" (vmx->fail) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2325 | : "r"(vmx->launched), "d"((unsigned long)HOST_RSP), |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2326 | "c"(vcpu), |
| 2327 | [rax]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RAX])), |
| 2328 | [rbx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBX])), |
| 2329 | [rcx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RCX])), |
| 2330 | [rdx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDX])), |
| 2331 | [rsi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RSI])), |
| 2332 | [rdi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDI])), |
| 2333 | [rbp]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBP])), |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2334 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2335 | [r8 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R8 ])), |
| 2336 | [r9 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R9 ])), |
| 2337 | [r10]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R10])), |
| 2338 | [r11]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R11])), |
| 2339 | [r12]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R12])), |
| 2340 | [r13]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R13])), |
| 2341 | [r14]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R14])), |
| 2342 | [r15]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R15])), |
| 2343 | #endif |
| 2344 | [cr2]"i"(offsetof(struct kvm_vcpu, cr2)) |
| 2345 | : "cc", "memory" ); |
| 2346 | |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2347 | vcpu->interrupt_window_open = (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2348 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2349 | asm ("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2350 | vmx->launched = 1; |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 2351 | |
| 2352 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
| 2353 | |
| 2354 | /* We need to handle NMIs before interrupts are enabled */ |
| 2355 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ |
| 2356 | asm("int $2"); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2357 | } |
| 2358 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2359 | static void vmx_inject_page_fault(struct kvm_vcpu *vcpu, |
| 2360 | unsigned long addr, |
| 2361 | u32 err_code) |
| 2362 | { |
| 2363 | u32 vect_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
| 2364 | |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2365 | ++vcpu->stat.pf_guest; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2366 | |
| 2367 | if (is_page_fault(vect_info)) { |
| 2368 | printk(KERN_DEBUG "inject_page_fault: " |
| 2369 | "double fault 0x%lx @ 0x%lx\n", |
| 2370 | addr, vmcs_readl(GUEST_RIP)); |
| 2371 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, 0); |
| 2372 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 2373 | DF_VECTOR | |
| 2374 | INTR_TYPE_EXCEPTION | |
| 2375 | INTR_INFO_DELIEVER_CODE_MASK | |
| 2376 | INTR_INFO_VALID_MASK); |
| 2377 | return; |
| 2378 | } |
| 2379 | vcpu->cr2 = addr; |
| 2380 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, err_code); |
| 2381 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 2382 | PF_VECTOR | |
| 2383 | INTR_TYPE_EXCEPTION | |
| 2384 | INTR_INFO_DELIEVER_CODE_MASK | |
| 2385 | INTR_INFO_VALID_MASK); |
| 2386 | |
| 2387 | } |
| 2388 | |
| 2389 | static void vmx_free_vmcs(struct kvm_vcpu *vcpu) |
| 2390 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2391 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 2392 | |
| 2393 | if (vmx->vmcs) { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 2394 | on_each_cpu(__vcpu_clear, vmx, 0, 1); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2395 | free_vmcs(vmx->vmcs); |
| 2396 | vmx->vmcs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2397 | } |
| 2398 | } |
| 2399 | |
| 2400 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) |
| 2401 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2402 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 2403 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2404 | vmx_free_vmcs(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2405 | kfree(vmx->host_msrs); |
| 2406 | kfree(vmx->guest_msrs); |
| 2407 | kvm_vcpu_uninit(vcpu); |
Rusty Russell | a477034 | 2007-08-01 14:46:11 +1000 | [diff] [blame] | 2408 | kmem_cache_free(kvm_vcpu_cache, vmx); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2409 | } |
| 2410 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2411 | static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2412 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2413 | int err; |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2414 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2415 | int cpu; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2416 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2417 | if (!vmx) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2418 | return ERR_PTR(-ENOMEM); |
| 2419 | |
| 2420 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
| 2421 | if (err) |
| 2422 | goto free_vcpu; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2423 | |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 2424 | if (irqchip_in_kernel(kvm)) { |
| 2425 | err = kvm_create_lapic(&vmx->vcpu); |
| 2426 | if (err < 0) |
| 2427 | goto free_vcpu; |
| 2428 | } |
| 2429 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2430 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2431 | if (!vmx->guest_msrs) { |
| 2432 | err = -ENOMEM; |
| 2433 | goto uninit_vcpu; |
| 2434 | } |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2435 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2436 | vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
| 2437 | if (!vmx->host_msrs) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2438 | goto free_guest_msrs; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2439 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2440 | vmx->vmcs = alloc_vmcs(); |
| 2441 | if (!vmx->vmcs) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2442 | goto free_msrs; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2443 | |
| 2444 | vmcs_clear(vmx->vmcs); |
| 2445 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2446 | cpu = get_cpu(); |
| 2447 | vmx_vcpu_load(&vmx->vcpu, cpu); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 2448 | err = vmx_vcpu_setup(vmx); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2449 | vmx_vcpu_put(&vmx->vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2450 | put_cpu(); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2451 | if (err) |
| 2452 | goto free_vmcs; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2453 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2454 | return &vmx->vcpu; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2455 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2456 | free_vmcs: |
| 2457 | free_vmcs(vmx->vmcs); |
| 2458 | free_msrs: |
| 2459 | kfree(vmx->host_msrs); |
| 2460 | free_guest_msrs: |
| 2461 | kfree(vmx->guest_msrs); |
| 2462 | uninit_vcpu: |
| 2463 | kvm_vcpu_uninit(&vmx->vcpu); |
| 2464 | free_vcpu: |
Rusty Russell | a477034 | 2007-08-01 14:46:11 +1000 | [diff] [blame] | 2465 | kmem_cache_free(kvm_vcpu_cache, vmx); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2466 | return ERR_PTR(err); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2467 | } |
| 2468 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2469 | static void __init vmx_check_processor_compat(void *rtn) |
| 2470 | { |
| 2471 | struct vmcs_config vmcs_conf; |
| 2472 | |
| 2473 | *(int *)rtn = 0; |
| 2474 | if (setup_vmcs_config(&vmcs_conf) < 0) |
| 2475 | *(int *)rtn = -EIO; |
| 2476 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { |
| 2477 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", |
| 2478 | smp_processor_id()); |
| 2479 | *(int *)rtn = -EIO; |
| 2480 | } |
| 2481 | } |
| 2482 | |
Christian Ehrhardt | cbdd1be | 2007-09-09 15:41:59 +0300 | [diff] [blame] | 2483 | static struct kvm_x86_ops vmx_x86_ops = { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2484 | .cpu_has_kvm_support = cpu_has_kvm_support, |
| 2485 | .disabled_by_bios = vmx_disabled_by_bios, |
| 2486 | .hardware_setup = hardware_setup, |
| 2487 | .hardware_unsetup = hardware_unsetup, |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2488 | .check_processor_compatibility = vmx_check_processor_compat, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2489 | .hardware_enable = hardware_enable, |
| 2490 | .hardware_disable = hardware_disable, |
| 2491 | |
| 2492 | .vcpu_create = vmx_create_vcpu, |
| 2493 | .vcpu_free = vmx_free_vcpu, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2494 | .vcpu_reset = vmx_vcpu_reset, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2495 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2496 | .prepare_guest_switch = vmx_save_host_state, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2497 | .vcpu_load = vmx_vcpu_load, |
| 2498 | .vcpu_put = vmx_vcpu_put, |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2499 | .vcpu_decache = vmx_vcpu_decache, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2500 | |
| 2501 | .set_guest_debug = set_guest_debug, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2502 | .guest_debug_pre = kvm_guest_debug_pre, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2503 | .get_msr = vmx_get_msr, |
| 2504 | .set_msr = vmx_set_msr, |
| 2505 | .get_segment_base = vmx_get_segment_base, |
| 2506 | .get_segment = vmx_get_segment, |
| 2507 | .set_segment = vmx_set_segment, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2508 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 2509 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2510 | .set_cr0 = vmx_set_cr0, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2511 | .set_cr3 = vmx_set_cr3, |
| 2512 | .set_cr4 = vmx_set_cr4, |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2513 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2514 | .set_efer = vmx_set_efer, |
| 2515 | #endif |
| 2516 | .get_idt = vmx_get_idt, |
| 2517 | .set_idt = vmx_set_idt, |
| 2518 | .get_gdt = vmx_get_gdt, |
| 2519 | .set_gdt = vmx_set_gdt, |
| 2520 | .cache_regs = vcpu_load_rsp_rip, |
| 2521 | .decache_regs = vcpu_put_rsp_rip, |
| 2522 | .get_rflags = vmx_get_rflags, |
| 2523 | .set_rflags = vmx_set_rflags, |
| 2524 | |
| 2525 | .tlb_flush = vmx_flush_tlb, |
| 2526 | .inject_page_fault = vmx_inject_page_fault, |
| 2527 | |
| 2528 | .inject_gp = vmx_inject_gp, |
| 2529 | |
| 2530 | .run = vmx_vcpu_run, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2531 | .handle_exit = kvm_handle_exit, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2532 | .skip_emulated_instruction = skip_emulated_instruction, |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2533 | .patch_hypercall = vmx_patch_hypercall, |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 2534 | .get_irq = vmx_get_irq, |
| 2535 | .set_irq = vmx_inject_irq, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2536 | .inject_pending_irq = vmx_intr_assist, |
| 2537 | .inject_pending_vectors = do_interrupt_requests, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2538 | }; |
| 2539 | |
| 2540 | static int __init vmx_init(void) |
| 2541 | { |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2542 | void *iova; |
| 2543 | int r; |
| 2544 | |
| 2545 | vmx_io_bitmap_a = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); |
| 2546 | if (!vmx_io_bitmap_a) |
| 2547 | return -ENOMEM; |
| 2548 | |
| 2549 | vmx_io_bitmap_b = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); |
| 2550 | if (!vmx_io_bitmap_b) { |
| 2551 | r = -ENOMEM; |
| 2552 | goto out; |
| 2553 | } |
| 2554 | |
| 2555 | /* |
| 2556 | * Allow direct access to the PC debug port (it is often used for I/O |
| 2557 | * delays, but the vmexits simply slow things down). |
| 2558 | */ |
| 2559 | iova = kmap(vmx_io_bitmap_a); |
| 2560 | memset(iova, 0xff, PAGE_SIZE); |
| 2561 | clear_bit(0x80, iova); |
Avi Kivity | cd0536d | 2007-05-08 11:34:07 +0300 | [diff] [blame] | 2562 | kunmap(vmx_io_bitmap_a); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2563 | |
| 2564 | iova = kmap(vmx_io_bitmap_b); |
| 2565 | memset(iova, 0xff, PAGE_SIZE); |
Avi Kivity | cd0536d | 2007-05-08 11:34:07 +0300 | [diff] [blame] | 2566 | kunmap(vmx_io_bitmap_b); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2567 | |
Christian Ehrhardt | cbdd1be | 2007-09-09 15:41:59 +0300 | [diff] [blame] | 2568 | r = kvm_init_x86(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2569 | if (r) |
| 2570 | goto out1; |
| 2571 | |
| 2572 | return 0; |
| 2573 | |
| 2574 | out1: |
| 2575 | __free_page(vmx_io_bitmap_b); |
| 2576 | out: |
| 2577 | __free_page(vmx_io_bitmap_a); |
| 2578 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2579 | } |
| 2580 | |
| 2581 | static void __exit vmx_exit(void) |
| 2582 | { |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2583 | __free_page(vmx_io_bitmap_b); |
| 2584 | __free_page(vmx_io_bitmap_a); |
| 2585 | |
Christian Ehrhardt | cbdd1be | 2007-09-09 15:41:59 +0300 | [diff] [blame] | 2586 | kvm_exit_x86(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2587 | } |
| 2588 | |
| 2589 | module_init(vmx_init) |
| 2590 | module_exit(vmx_exit) |