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 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 18 | #include "irq.h" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 19 | #include "vmx.h" |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 20 | #include "segment_descriptor.h" |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 21 | #include "mmu.h" |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 22 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 23 | #include <linux/kvm_host.h> |
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 | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 29 | #include <linux/moduleparam.h> |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 30 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 31 | #include <asm/io.h> |
Anthony Liguori | 3b3be0d | 2006-12-13 00:33:43 -0800 | [diff] [blame] | 32 | #include <asm/desc.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 33 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 34 | MODULE_AUTHOR("Qumranet"); |
| 35 | MODULE_LICENSE("GPL"); |
| 36 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 37 | static int bypass_guest_pf = 1; |
| 38 | module_param(bypass_guest_pf, bool, 0); |
| 39 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 40 | struct vmcs { |
| 41 | u32 revision_id; |
| 42 | u32 abort; |
| 43 | char data[0]; |
| 44 | }; |
| 45 | |
| 46 | struct vcpu_vmx { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 47 | struct kvm_vcpu vcpu; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 48 | int launched; |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 49 | u8 fail; |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 50 | u32 idt_vectoring_info; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 51 | struct kvm_msr_entry *guest_msrs; |
| 52 | struct kvm_msr_entry *host_msrs; |
| 53 | int nmsrs; |
| 54 | int save_nmsrs; |
| 55 | int msr_offset_efer; |
| 56 | #ifdef CONFIG_X86_64 |
| 57 | int msr_offset_kernel_gs_base; |
| 58 | #endif |
| 59 | struct vmcs *vmcs; |
| 60 | struct { |
| 61 | int loaded; |
| 62 | u16 fs_sel, gs_sel, ldt_sel; |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 63 | int gs_ldt_reload_needed; |
| 64 | int fs_reload_needed; |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 65 | int guest_efer_loaded; |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 66 | } host_state; |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 67 | struct { |
| 68 | struct { |
| 69 | bool pending; |
| 70 | u8 vector; |
| 71 | unsigned rip; |
| 72 | } irq; |
| 73 | } rmode; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 74 | }; |
| 75 | |
| 76 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) |
| 77 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 78 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 79 | } |
| 80 | |
Avi Kivity | 75880a0 | 2007-06-20 11:20:04 +0300 | [diff] [blame] | 81 | static int init_rmode_tss(struct kvm *kvm); |
| 82 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 83 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
| 84 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); |
| 85 | |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 86 | static struct page *vmx_io_bitmap_a; |
| 87 | static struct page *vmx_io_bitmap_b; |
| 88 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 89 | static struct vmcs_config { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 90 | int size; |
| 91 | int order; |
| 92 | u32 revision_id; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 93 | u32 pin_based_exec_ctrl; |
| 94 | u32 cpu_based_exec_ctrl; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 95 | u32 cpu_based_2nd_exec_ctrl; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 96 | u32 vmexit_ctrl; |
| 97 | u32 vmentry_ctrl; |
| 98 | } vmcs_config; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 99 | |
| 100 | #define VMX_SEGMENT_FIELD(seg) \ |
| 101 | [VCPU_SREG_##seg] = { \ |
| 102 | .selector = GUEST_##seg##_SELECTOR, \ |
| 103 | .base = GUEST_##seg##_BASE, \ |
| 104 | .limit = GUEST_##seg##_LIMIT, \ |
| 105 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ |
| 106 | } |
| 107 | |
| 108 | static struct kvm_vmx_segment_field { |
| 109 | unsigned selector; |
| 110 | unsigned base; |
| 111 | unsigned limit; |
| 112 | unsigned ar_bytes; |
| 113 | } kvm_vmx_segment_fields[] = { |
| 114 | VMX_SEGMENT_FIELD(CS), |
| 115 | VMX_SEGMENT_FIELD(DS), |
| 116 | VMX_SEGMENT_FIELD(ES), |
| 117 | VMX_SEGMENT_FIELD(FS), |
| 118 | VMX_SEGMENT_FIELD(GS), |
| 119 | VMX_SEGMENT_FIELD(SS), |
| 120 | VMX_SEGMENT_FIELD(TR), |
| 121 | VMX_SEGMENT_FIELD(LDTR), |
| 122 | }; |
| 123 | |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 124 | /* |
| 125 | * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it |
| 126 | * away by decrementing the array size. |
| 127 | */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 128 | static const u32 vmx_msr_index[] = { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 129 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 130 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE, |
| 131 | #endif |
| 132 | MSR_EFER, MSR_K6_STAR, |
| 133 | }; |
Ahmed S. Darwish | 9d8f549 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 134 | #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 135 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 136 | static void load_msrs(struct kvm_msr_entry *e, int n) |
| 137 | { |
| 138 | int i; |
| 139 | |
| 140 | for (i = 0; i < n; ++i) |
| 141 | wrmsrl(e[i].index, e[i].data); |
| 142 | } |
| 143 | |
| 144 | static void save_msrs(struct kvm_msr_entry *e, int n) |
| 145 | { |
| 146 | int i; |
| 147 | |
| 148 | for (i = 0; i < n; ++i) |
| 149 | rdmsrl(e[i].index, e[i].data); |
| 150 | } |
| 151 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 152 | static inline int is_page_fault(u32 intr_info) |
| 153 | { |
| 154 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 155 | INTR_INFO_VALID_MASK)) == |
| 156 | (INTR_TYPE_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); |
| 157 | } |
| 158 | |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 159 | static inline int is_no_device(u32 intr_info) |
| 160 | { |
| 161 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 162 | INTR_INFO_VALID_MASK)) == |
| 163 | (INTR_TYPE_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); |
| 164 | } |
| 165 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 166 | static inline int is_invalid_opcode(u32 intr_info) |
| 167 | { |
| 168 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 169 | INTR_INFO_VALID_MASK)) == |
| 170 | (INTR_TYPE_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); |
| 171 | } |
| 172 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 173 | static inline int is_external_interrupt(u32 intr_info) |
| 174 | { |
| 175 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) |
| 176 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); |
| 177 | } |
| 178 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 179 | static inline int cpu_has_vmx_tpr_shadow(void) |
| 180 | { |
| 181 | return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW); |
| 182 | } |
| 183 | |
| 184 | static inline int vm_need_tpr_shadow(struct kvm *kvm) |
| 185 | { |
| 186 | return ((cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm))); |
| 187 | } |
| 188 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 189 | static inline int cpu_has_secondary_exec_ctrls(void) |
| 190 | { |
| 191 | return (vmcs_config.cpu_based_exec_ctrl & |
| 192 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS); |
| 193 | } |
| 194 | |
Avi Kivity | 774ead3 | 2007-12-26 13:57:04 +0200 | [diff] [blame] | 195 | static inline bool cpu_has_vmx_virtualize_apic_accesses(void) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 196 | { |
| 197 | return (vmcs_config.cpu_based_2nd_exec_ctrl & |
| 198 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES); |
| 199 | } |
| 200 | |
| 201 | static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm) |
| 202 | { |
| 203 | return ((cpu_has_vmx_virtualize_apic_accesses()) && |
| 204 | (irqchip_in_kernel(kvm))); |
| 205 | } |
| 206 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 207 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
Avi Kivity | 7725f0b | 2006-12-13 00:34:01 -0800 | [diff] [blame] | 208 | { |
| 209 | int i; |
| 210 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 211 | for (i = 0; i < vmx->nmsrs; ++i) |
| 212 | if (vmx->guest_msrs[i].index == msr) |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 213 | return i; |
| 214 | return -1; |
| 215 | } |
| 216 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 217 | 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] | 218 | { |
| 219 | int i; |
| 220 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 221 | i = __find_msr_index(vmx, msr); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 222 | if (i >= 0) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 223 | return &vmx->guest_msrs[i]; |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 224 | return NULL; |
Avi Kivity | 7725f0b | 2006-12-13 00:34:01 -0800 | [diff] [blame] | 225 | } |
| 226 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 227 | static void vmcs_clear(struct vmcs *vmcs) |
| 228 | { |
| 229 | u64 phys_addr = __pa(vmcs); |
| 230 | u8 error; |
| 231 | |
| 232 | asm volatile (ASM_VMX_VMCLEAR_RAX "; setna %0" |
| 233 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
| 234 | : "cc", "memory"); |
| 235 | if (error) |
| 236 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", |
| 237 | vmcs, phys_addr); |
| 238 | } |
| 239 | |
| 240 | static void __vcpu_clear(void *arg) |
| 241 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 242 | struct vcpu_vmx *vmx = arg; |
Ingo Molnar | d3b2c33 | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 243 | int cpu = raw_smp_processor_id(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 244 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 245 | if (vmx->vcpu.cpu == cpu) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 246 | vmcs_clear(vmx->vmcs); |
| 247 | if (per_cpu(current_vmcs, cpu) == vmx->vmcs) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 248 | per_cpu(current_vmcs, cpu) = NULL; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 249 | rdtscll(vmx->vcpu.arch.host_tsc); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 250 | } |
| 251 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 252 | static void vcpu_clear(struct vcpu_vmx *vmx) |
Avi Kivity | 8d0be2b | 2007-02-12 00:54:46 -0800 | [diff] [blame] | 253 | { |
Avi Kivity | eae5ecb | 2007-09-30 10:50:12 +0200 | [diff] [blame] | 254 | if (vmx->vcpu.cpu == -1) |
| 255 | return; |
Avi Kivity | f566e09 | 2007-09-30 11:02:53 +0200 | [diff] [blame] | 256 | smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 0, 1); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 257 | vmx->launched = 0; |
Avi Kivity | 8d0be2b | 2007-02-12 00:54:46 -0800 | [diff] [blame] | 258 | } |
| 259 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 260 | static unsigned long vmcs_readl(unsigned long field) |
| 261 | { |
| 262 | unsigned long value; |
| 263 | |
| 264 | asm volatile (ASM_VMX_VMREAD_RDX_RAX |
| 265 | : "=a"(value) : "d"(field) : "cc"); |
| 266 | return value; |
| 267 | } |
| 268 | |
| 269 | static u16 vmcs_read16(unsigned long field) |
| 270 | { |
| 271 | return vmcs_readl(field); |
| 272 | } |
| 273 | |
| 274 | static u32 vmcs_read32(unsigned long field) |
| 275 | { |
| 276 | return vmcs_readl(field); |
| 277 | } |
| 278 | |
| 279 | static u64 vmcs_read64(unsigned long field) |
| 280 | { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 281 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 282 | return vmcs_readl(field); |
| 283 | #else |
| 284 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); |
| 285 | #endif |
| 286 | } |
| 287 | |
Avi Kivity | e52de1b | 2007-01-05 16:36:56 -0800 | [diff] [blame] | 288 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
| 289 | { |
| 290 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", |
| 291 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); |
| 292 | dump_stack(); |
| 293 | } |
| 294 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 295 | static void vmcs_writel(unsigned long field, unsigned long value) |
| 296 | { |
| 297 | u8 error; |
| 298 | |
| 299 | asm volatile (ASM_VMX_VMWRITE_RAX_RDX "; setna %0" |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 300 | : "=q"(error) : "a"(value), "d"(field) : "cc"); |
Avi Kivity | e52de1b | 2007-01-05 16:36:56 -0800 | [diff] [blame] | 301 | if (unlikely(error)) |
| 302 | vmwrite_error(field, value); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | static void vmcs_write16(unsigned long field, u16 value) |
| 306 | { |
| 307 | vmcs_writel(field, value); |
| 308 | } |
| 309 | |
| 310 | static void vmcs_write32(unsigned long field, u32 value) |
| 311 | { |
| 312 | vmcs_writel(field, value); |
| 313 | } |
| 314 | |
| 315 | static void vmcs_write64(unsigned long field, u64 value) |
| 316 | { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 317 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 318 | vmcs_writel(field, value); |
| 319 | #else |
| 320 | vmcs_writel(field, value); |
| 321 | asm volatile (""); |
| 322 | vmcs_writel(field+1, value >> 32); |
| 323 | #endif |
| 324 | } |
| 325 | |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 326 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
| 327 | { |
| 328 | vmcs_writel(field, vmcs_readl(field) & ~mask); |
| 329 | } |
| 330 | |
| 331 | static void vmcs_set_bits(unsigned long field, u32 mask) |
| 332 | { |
| 333 | vmcs_writel(field, vmcs_readl(field) | mask); |
| 334 | } |
| 335 | |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 336 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
| 337 | { |
| 338 | u32 eb; |
| 339 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 340 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR); |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 341 | if (!vcpu->fpu_active) |
| 342 | eb |= 1u << NM_VECTOR; |
| 343 | if (vcpu->guest_debug.enabled) |
| 344 | eb |= 1u << 1; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 345 | if (vcpu->arch.rmode.active) |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 346 | eb = ~0; |
| 347 | vmcs_write32(EXCEPTION_BITMAP, eb); |
| 348 | } |
| 349 | |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 350 | static void reload_tss(void) |
| 351 | { |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 352 | /* |
| 353 | * VT restores TR but not its size. Useless. |
| 354 | */ |
| 355 | struct descriptor_table gdt; |
| 356 | struct segment_descriptor *descs; |
| 357 | |
| 358 | get_gdt(&gdt); |
| 359 | descs = (void *)gdt.base; |
| 360 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ |
| 361 | load_TR_desc(); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 362 | } |
| 363 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 364 | static void load_transition_efer(struct vcpu_vmx *vmx) |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 365 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 366 | int efer_offset = vmx->msr_offset_efer; |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 367 | u64 host_efer = vmx->host_msrs[efer_offset].data; |
| 368 | u64 guest_efer = vmx->guest_msrs[efer_offset].data; |
| 369 | u64 ignore_bits; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 370 | |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 371 | if (efer_offset < 0) |
| 372 | return; |
| 373 | /* |
| 374 | * NX is emulated; LMA and LME handled by hardware; SCE meaninless |
| 375 | * outside long mode |
| 376 | */ |
| 377 | ignore_bits = EFER_NX | EFER_SCE; |
| 378 | #ifdef CONFIG_X86_64 |
| 379 | ignore_bits |= EFER_LMA | EFER_LME; |
| 380 | /* SCE is meaningful only in long mode on Intel */ |
| 381 | if (guest_efer & EFER_LMA) |
| 382 | ignore_bits &= ~(u64)EFER_SCE; |
| 383 | #endif |
| 384 | if ((guest_efer & ~ignore_bits) == (host_efer & ~ignore_bits)) |
| 385 | return; |
| 386 | |
| 387 | vmx->host_state.guest_efer_loaded = 1; |
| 388 | guest_efer &= ~ignore_bits; |
| 389 | guest_efer |= host_efer & ignore_bits; |
| 390 | wrmsrl(MSR_EFER, guest_efer); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 391 | vmx->vcpu.stat.efer_reload++; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 392 | } |
| 393 | |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 394 | static void reload_host_efer(struct vcpu_vmx *vmx) |
| 395 | { |
| 396 | if (vmx->host_state.guest_efer_loaded) { |
| 397 | vmx->host_state.guest_efer_loaded = 0; |
| 398 | load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1); |
| 399 | } |
| 400 | } |
| 401 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 402 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 403 | { |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 404 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 405 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 406 | if (vmx->host_state.loaded) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 407 | return; |
| 408 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 409 | vmx->host_state.loaded = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 410 | /* |
| 411 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not |
| 412 | * allow segment selectors with cpl > 0 or ti == 1. |
| 413 | */ |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 414 | vmx->host_state.ldt_sel = read_ldt(); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 415 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 416 | vmx->host_state.fs_sel = read_fs(); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 417 | if (!(vmx->host_state.fs_sel & 7)) { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 418 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 419 | vmx->host_state.fs_reload_needed = 0; |
| 420 | } else { |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 421 | vmcs_write16(HOST_FS_SELECTOR, 0); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 422 | vmx->host_state.fs_reload_needed = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 423 | } |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 424 | vmx->host_state.gs_sel = read_gs(); |
| 425 | if (!(vmx->host_state.gs_sel & 7)) |
| 426 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 427 | else { |
| 428 | vmcs_write16(HOST_GS_SELECTOR, 0); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 429 | vmx->host_state.gs_ldt_reload_needed = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | #ifdef CONFIG_X86_64 |
| 433 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); |
| 434 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); |
| 435 | #else |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 436 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
| 437 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 438 | #endif |
Avi Kivity | 707c087 | 2007-05-02 17:33:43 +0300 | [diff] [blame] | 439 | |
| 440 | #ifdef CONFIG_X86_64 |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 441 | if (is_long_mode(&vmx->vcpu)) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 442 | save_msrs(vmx->host_msrs + |
| 443 | vmx->msr_offset_kernel_gs_base, 1); |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 444 | |
Avi Kivity | 707c087 | 2007-05-02 17:33:43 +0300 | [diff] [blame] | 445 | #endif |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 446 | load_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 447 | load_transition_efer(vmx); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 448 | } |
| 449 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 450 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 451 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 452 | unsigned long flags; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 453 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 454 | if (!vmx->host_state.loaded) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 455 | return; |
| 456 | |
Avi Kivity | e1beb1d | 2007-11-18 13:50:24 +0200 | [diff] [blame] | 457 | ++vmx->vcpu.stat.host_state_reload; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 458 | vmx->host_state.loaded = 0; |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 459 | if (vmx->host_state.fs_reload_needed) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 460 | load_fs(vmx->host_state.fs_sel); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 461 | if (vmx->host_state.gs_ldt_reload_needed) { |
| 462 | load_ldt(vmx->host_state.ldt_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 463 | /* |
| 464 | * If we have to reload gs, we must take care to |
| 465 | * preserve our gs base. |
| 466 | */ |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 467 | local_irq_save(flags); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 468 | load_gs(vmx->host_state.gs_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 469 | #ifdef CONFIG_X86_64 |
| 470 | wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE)); |
| 471 | #endif |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 472 | local_irq_restore(flags); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 473 | } |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 474 | reload_tss(); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 475 | save_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
| 476 | load_msrs(vmx->host_msrs, vmx->save_nmsrs); |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 477 | reload_host_efer(vmx); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 478 | } |
| 479 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 480 | /* |
| 481 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes |
| 482 | * vcpu mutex is already taken. |
| 483 | */ |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 484 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 485 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 486 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 487 | u64 phys_addr = __pa(vmx->vmcs); |
Avi Kivity | 7700270 | 2007-06-13 19:55:28 +0300 | [diff] [blame] | 488 | u64 tsc_this, delta; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 489 | |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 490 | if (vcpu->cpu != cpu) { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 491 | vcpu_clear(vmx); |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 492 | kvm_migrate_apic_timer(vcpu); |
| 493 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 494 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 495 | if (per_cpu(current_vmcs, cpu) != vmx->vmcs) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 496 | u8 error; |
| 497 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 498 | per_cpu(current_vmcs, cpu) = vmx->vmcs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 499 | asm volatile (ASM_VMX_VMPTRLD_RAX "; setna %0" |
| 500 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
| 501 | : "cc"); |
| 502 | if (error) |
| 503 | printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n", |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 504 | vmx->vmcs, phys_addr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | if (vcpu->cpu != cpu) { |
| 508 | struct descriptor_table dt; |
| 509 | unsigned long sysenter_esp; |
| 510 | |
| 511 | vcpu->cpu = cpu; |
| 512 | /* |
| 513 | * Linux uses per-cpu TSS and GDT, so set these when switching |
| 514 | * processors. |
| 515 | */ |
| 516 | vmcs_writel(HOST_TR_BASE, read_tr_base()); /* 22.2.4 */ |
| 517 | get_gdt(&dt); |
| 518 | vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */ |
| 519 | |
| 520 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); |
| 521 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ |
Avi Kivity | 7700270 | 2007-06-13 19:55:28 +0300 | [diff] [blame] | 522 | |
| 523 | /* |
| 524 | * Make sure the time stamp counter is monotonous. |
| 525 | */ |
| 526 | rdtscll(tsc_this); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 527 | delta = vcpu->arch.host_tsc - tsc_this; |
Avi Kivity | 7700270 | 2007-06-13 19:55:28 +0300 | [diff] [blame] | 528 | vmcs_write64(TSC_OFFSET, vmcs_read64(TSC_OFFSET) + delta); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 529 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 530 | } |
| 531 | |
| 532 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) |
| 533 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 534 | vmx_load_host_state(to_vmx(vcpu)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 535 | } |
| 536 | |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 537 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
| 538 | { |
| 539 | if (vcpu->fpu_active) |
| 540 | return; |
| 541 | vcpu->fpu_active = 1; |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 542 | vmcs_clear_bits(GUEST_CR0, X86_CR0_TS); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 543 | if (vcpu->arch.cr0 & X86_CR0_TS) |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 544 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 545 | update_exception_bitmap(vcpu); |
| 546 | } |
| 547 | |
| 548 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) |
| 549 | { |
| 550 | if (!vcpu->fpu_active) |
| 551 | return; |
| 552 | vcpu->fpu_active = 0; |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 553 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 554 | update_exception_bitmap(vcpu); |
| 555 | } |
| 556 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 557 | static void vmx_vcpu_decache(struct kvm_vcpu *vcpu) |
| 558 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 559 | vcpu_clear(to_vmx(vcpu)); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 560 | } |
| 561 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 562 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
| 563 | { |
| 564 | return vmcs_readl(GUEST_RFLAGS); |
| 565 | } |
| 566 | |
| 567 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
| 568 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 569 | if (vcpu->arch.rmode.active) |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 570 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 571 | vmcs_writel(GUEST_RFLAGS, rflags); |
| 572 | } |
| 573 | |
| 574 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
| 575 | { |
| 576 | unsigned long rip; |
| 577 | u32 interruptibility; |
| 578 | |
| 579 | rip = vmcs_readl(GUEST_RIP); |
| 580 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
| 581 | vmcs_writel(GUEST_RIP, rip); |
| 582 | |
| 583 | /* |
| 584 | * We emulated an instruction, so temporary interrupt blocking |
| 585 | * should be removed, if set. |
| 586 | */ |
| 587 | interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); |
| 588 | if (interruptibility & 3) |
| 589 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, |
| 590 | interruptibility & ~3); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 591 | vcpu->arch.interrupt_window_open = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 592 | } |
| 593 | |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 594 | static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
| 595 | bool has_error_code, u32 error_code) |
| 596 | { |
| 597 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 598 | nr | INTR_TYPE_EXCEPTION |
| 599 | | (has_error_code ? INTR_INFO_DELIEVER_CODE_MASK : 0) |
| 600 | | INTR_INFO_VALID_MASK); |
| 601 | if (has_error_code) |
| 602 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); |
| 603 | } |
| 604 | |
| 605 | static bool vmx_exception_injected(struct kvm_vcpu *vcpu) |
| 606 | { |
| 607 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 608 | |
| 609 | return !(vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK); |
| 610 | } |
| 611 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 612 | /* |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 613 | * Swap MSR entry in host/guest MSR entry array. |
| 614 | */ |
Gabriel C | 54e11fa | 2007-08-01 16:23:10 +0200 | [diff] [blame] | 615 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 616 | 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] | 617 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 618 | struct kvm_msr_entry tmp; |
| 619 | |
| 620 | tmp = vmx->guest_msrs[to]; |
| 621 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; |
| 622 | vmx->guest_msrs[from] = tmp; |
| 623 | tmp = vmx->host_msrs[to]; |
| 624 | vmx->host_msrs[to] = vmx->host_msrs[from]; |
| 625 | vmx->host_msrs[from] = tmp; |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 626 | } |
Gabriel C | 54e11fa | 2007-08-01 16:23:10 +0200 | [diff] [blame] | 627 | #endif |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 628 | |
| 629 | /* |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 630 | * Set up the vmcs to automatically save and restore system |
| 631 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy |
| 632 | * mode, as fiddling with msrs is very expensive. |
| 633 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 634 | static void setup_msrs(struct vcpu_vmx *vmx) |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 635 | { |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 636 | int save_nmsrs; |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 637 | |
Avi Kivity | 33f9c50 | 2008-02-27 16:06:57 +0200 | [diff] [blame] | 638 | vmx_load_host_state(vmx); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 639 | save_nmsrs = 0; |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 640 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 641 | if (is_long_mode(&vmx->vcpu)) { |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 642 | int index; |
| 643 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 644 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 645 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 646 | move_msr_up(vmx, index, save_nmsrs++); |
| 647 | index = __find_msr_index(vmx, MSR_LSTAR); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 648 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 649 | move_msr_up(vmx, index, save_nmsrs++); |
| 650 | index = __find_msr_index(vmx, MSR_CSTAR); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 651 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 652 | move_msr_up(vmx, index, save_nmsrs++); |
| 653 | index = __find_msr_index(vmx, MSR_KERNEL_GS_BASE); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 654 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 655 | move_msr_up(vmx, index, save_nmsrs++); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 656 | /* |
| 657 | * MSR_K6_STAR is only needed on long mode guests, and only |
| 658 | * if efer.sce is enabled. |
| 659 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 660 | index = __find_msr_index(vmx, MSR_K6_STAR); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 661 | if ((index >= 0) && (vmx->vcpu.arch.shadow_efer & EFER_SCE)) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 662 | move_msr_up(vmx, index, save_nmsrs++); |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 663 | } |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 664 | #endif |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 665 | vmx->save_nmsrs = save_nmsrs; |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 666 | |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 667 | #ifdef CONFIG_X86_64 |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 668 | vmx->msr_offset_kernel_gs_base = |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 669 | __find_msr_index(vmx, MSR_KERNEL_GS_BASE); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 670 | #endif |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 671 | vmx->msr_offset_efer = __find_msr_index(vmx, MSR_EFER); |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 672 | } |
| 673 | |
| 674 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 675 | * reads and returns guest's timestamp counter "register" |
| 676 | * guest_tsc = host_tsc + tsc_offset -- 21.3 |
| 677 | */ |
| 678 | static u64 guest_read_tsc(void) |
| 679 | { |
| 680 | u64 host_tsc, tsc_offset; |
| 681 | |
| 682 | rdtscll(host_tsc); |
| 683 | tsc_offset = vmcs_read64(TSC_OFFSET); |
| 684 | return host_tsc + tsc_offset; |
| 685 | } |
| 686 | |
| 687 | /* |
| 688 | * writes 'guest_tsc' into guest's timestamp counter "register" |
| 689 | * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc |
| 690 | */ |
| 691 | static void guest_write_tsc(u64 guest_tsc) |
| 692 | { |
| 693 | u64 host_tsc; |
| 694 | |
| 695 | rdtscll(host_tsc); |
| 696 | vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc); |
| 697 | } |
| 698 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 699 | /* |
| 700 | * Reads an msr value (of 'msr_index') into 'pdata'. |
| 701 | * Returns 0 on success, non-0 otherwise. |
| 702 | * Assumes vcpu_load() was already called. |
| 703 | */ |
| 704 | static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
| 705 | { |
| 706 | u64 data; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 707 | struct kvm_msr_entry *msr; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 708 | |
| 709 | if (!pdata) { |
| 710 | printk(KERN_ERR "BUG: get_msr called with NULL pdata\n"); |
| 711 | return -EINVAL; |
| 712 | } |
| 713 | |
| 714 | switch (msr_index) { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 715 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 716 | case MSR_FS_BASE: |
| 717 | data = vmcs_readl(GUEST_FS_BASE); |
| 718 | break; |
| 719 | case MSR_GS_BASE: |
| 720 | data = vmcs_readl(GUEST_GS_BASE); |
| 721 | break; |
| 722 | case MSR_EFER: |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 723 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 724 | #endif |
| 725 | case MSR_IA32_TIME_STAMP_COUNTER: |
| 726 | data = guest_read_tsc(); |
| 727 | break; |
| 728 | case MSR_IA32_SYSENTER_CS: |
| 729 | data = vmcs_read32(GUEST_SYSENTER_CS); |
| 730 | break; |
| 731 | case MSR_IA32_SYSENTER_EIP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 732 | data = vmcs_readl(GUEST_SYSENTER_EIP); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 733 | break; |
| 734 | case MSR_IA32_SYSENTER_ESP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 735 | data = vmcs_readl(GUEST_SYSENTER_ESP); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 736 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 737 | default: |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 738 | msr = find_msr_entry(to_vmx(vcpu), msr_index); |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 739 | if (msr) { |
| 740 | data = msr->data; |
| 741 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 742 | } |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 743 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 744 | } |
| 745 | |
| 746 | *pdata = data; |
| 747 | return 0; |
| 748 | } |
| 749 | |
| 750 | /* |
| 751 | * Writes msr value into into the appropriate "register". |
| 752 | * Returns 0 on success, non-0 otherwise. |
| 753 | * Assumes vcpu_load() was already called. |
| 754 | */ |
| 755 | static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) |
| 756 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 757 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 758 | struct kvm_msr_entry *msr; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 759 | int ret = 0; |
| 760 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 761 | switch (msr_index) { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 762 | #ifdef CONFIG_X86_64 |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 763 | case MSR_EFER: |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 764 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 765 | if (vmx->host_state.loaded) { |
| 766 | reload_host_efer(vmx); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 767 | load_transition_efer(vmx); |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 768 | } |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 769 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 770 | case MSR_FS_BASE: |
| 771 | vmcs_writel(GUEST_FS_BASE, data); |
| 772 | break; |
| 773 | case MSR_GS_BASE: |
| 774 | vmcs_writel(GUEST_GS_BASE, data); |
| 775 | break; |
| 776 | #endif |
| 777 | case MSR_IA32_SYSENTER_CS: |
| 778 | vmcs_write32(GUEST_SYSENTER_CS, data); |
| 779 | break; |
| 780 | case MSR_IA32_SYSENTER_EIP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 781 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 782 | break; |
| 783 | case MSR_IA32_SYSENTER_ESP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 784 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 785 | break; |
Avi Kivity | d27d4ac | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 786 | case MSR_IA32_TIME_STAMP_COUNTER: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 787 | guest_write_tsc(data); |
| 788 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 789 | default: |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 790 | msr = find_msr_entry(vmx, msr_index); |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 791 | if (msr) { |
| 792 | msr->data = data; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 793 | if (vmx->host_state.loaded) |
| 794 | load_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 795 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 796 | } |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 797 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 798 | } |
| 799 | |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 800 | return ret; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 801 | } |
| 802 | |
| 803 | /* |
| 804 | * Sync the rsp and rip registers into the vcpu structure. This allows |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 805 | * registers to be accessed by indexing vcpu->arch.regs. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 806 | */ |
| 807 | static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu) |
| 808 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 809 | vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); |
| 810 | vcpu->arch.rip = vmcs_readl(GUEST_RIP); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 811 | } |
| 812 | |
| 813 | /* |
| 814 | * Syncs rsp and rip back into the vmcs. Should be called after possible |
| 815 | * modification. |
| 816 | */ |
| 817 | static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu) |
| 818 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 819 | vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]); |
| 820 | vmcs_writel(GUEST_RIP, vcpu->arch.rip); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 821 | } |
| 822 | |
| 823 | static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg) |
| 824 | { |
| 825 | unsigned long dr7 = 0x400; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 826 | int old_singlestep; |
| 827 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 828 | old_singlestep = vcpu->guest_debug.singlestep; |
| 829 | |
| 830 | vcpu->guest_debug.enabled = dbg->enabled; |
| 831 | if (vcpu->guest_debug.enabled) { |
| 832 | int i; |
| 833 | |
| 834 | dr7 |= 0x200; /* exact */ |
| 835 | for (i = 0; i < 4; ++i) { |
| 836 | if (!dbg->breakpoints[i].enabled) |
| 837 | continue; |
| 838 | vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address; |
| 839 | dr7 |= 2 << (i*2); /* global enable */ |
| 840 | dr7 |= 0 << (i*4+16); /* execution breakpoint */ |
| 841 | } |
| 842 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 843 | vcpu->guest_debug.singlestep = dbg->singlestep; |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 844 | } else |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 845 | vcpu->guest_debug.singlestep = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 846 | |
| 847 | if (old_singlestep && !vcpu->guest_debug.singlestep) { |
| 848 | unsigned long flags; |
| 849 | |
| 850 | flags = vmcs_readl(GUEST_RFLAGS); |
| 851 | flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); |
| 852 | vmcs_writel(GUEST_RFLAGS, flags); |
| 853 | } |
| 854 | |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 855 | update_exception_bitmap(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 856 | vmcs_writel(GUEST_DR7, dr7); |
| 857 | |
| 858 | return 0; |
| 859 | } |
| 860 | |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 861 | static int vmx_get_irq(struct kvm_vcpu *vcpu) |
| 862 | { |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 863 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 864 | u32 idtv_info_field; |
| 865 | |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 866 | idtv_info_field = vmx->idt_vectoring_info; |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 867 | if (idtv_info_field & INTR_INFO_VALID_MASK) { |
| 868 | if (is_external_interrupt(idtv_info_field)) |
| 869 | return idtv_info_field & VECTORING_INFO_VECTOR_MASK; |
| 870 | else |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 871 | printk(KERN_DEBUG "pending exception: not handled yet\n"); |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 872 | } |
| 873 | return -1; |
| 874 | } |
| 875 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 876 | static __init int cpu_has_kvm_support(void) |
| 877 | { |
| 878 | unsigned long ecx = cpuid_ecx(1); |
| 879 | return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */ |
| 880 | } |
| 881 | |
| 882 | static __init int vmx_disabled_by_bios(void) |
| 883 | { |
| 884 | u64 msr; |
| 885 | |
| 886 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); |
Yang, Sheng | 62b3ffb | 2007-07-25 12:17:06 +0300 | [diff] [blame] | 887 | return (msr & (MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 888 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) |
| 889 | == MSR_IA32_FEATURE_CONTROL_LOCKED; |
| 890 | /* locked but not enabled */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 891 | } |
| 892 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 893 | static void hardware_enable(void *garbage) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 894 | { |
| 895 | int cpu = raw_smp_processor_id(); |
| 896 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); |
| 897 | u64 old; |
| 898 | |
| 899 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); |
Yang, Sheng | 62b3ffb | 2007-07-25 12:17:06 +0300 | [diff] [blame] | 900 | if ((old & (MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 901 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) |
| 902 | != (MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 903 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 904 | /* enable and lock */ |
Yang, Sheng | 62b3ffb | 2007-07-25 12:17:06 +0300 | [diff] [blame] | 905 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | |
| 906 | MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 907 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED); |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 908 | write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 909 | asm volatile (ASM_VMX_VMXON_RAX : : "a"(&phys_addr), "m"(phys_addr) |
| 910 | : "memory", "cc"); |
| 911 | } |
| 912 | |
| 913 | static void hardware_disable(void *garbage) |
| 914 | { |
| 915 | asm volatile (ASM_VMX_VMXOFF : : : "cc"); |
| 916 | } |
| 917 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 918 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 919 | u32 msr, u32 *result) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 920 | { |
| 921 | u32 vmx_msr_low, vmx_msr_high; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 922 | u32 ctl = ctl_min | ctl_opt; |
| 923 | |
| 924 | rdmsr(msr, vmx_msr_low, vmx_msr_high); |
| 925 | |
| 926 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ |
| 927 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ |
| 928 | |
| 929 | /* Ensure minimum (required) set of control bits are supported. */ |
| 930 | if (ctl_min & ~ctl) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 931 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 932 | |
| 933 | *result = ctl; |
| 934 | return 0; |
| 935 | } |
| 936 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 937 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 938 | { |
| 939 | u32 vmx_msr_low, vmx_msr_high; |
| 940 | u32 min, opt; |
| 941 | u32 _pin_based_exec_control = 0; |
| 942 | u32 _cpu_based_exec_control = 0; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 943 | u32 _cpu_based_2nd_exec_control = 0; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 944 | u32 _vmexit_control = 0; |
| 945 | u32 _vmentry_control = 0; |
| 946 | |
| 947 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; |
| 948 | opt = 0; |
| 949 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, |
| 950 | &_pin_based_exec_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 951 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 952 | |
| 953 | min = CPU_BASED_HLT_EXITING | |
| 954 | #ifdef CONFIG_X86_64 |
| 955 | CPU_BASED_CR8_LOAD_EXITING | |
| 956 | CPU_BASED_CR8_STORE_EXITING | |
| 957 | #endif |
| 958 | CPU_BASED_USE_IO_BITMAPS | |
| 959 | CPU_BASED_MOV_DR_EXITING | |
| 960 | CPU_BASED_USE_TSC_OFFSETING; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 961 | opt = CPU_BASED_TPR_SHADOW | |
| 962 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 963 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
| 964 | &_cpu_based_exec_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 965 | return -EIO; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 966 | #ifdef CONFIG_X86_64 |
| 967 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) |
| 968 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & |
| 969 | ~CPU_BASED_CR8_STORE_EXITING; |
| 970 | #endif |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 971 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
| 972 | min = 0; |
Eddie Dong | e5edaa0 | 2007-11-11 12:28:35 +0200 | [diff] [blame] | 973 | opt = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | |
| 974 | SECONDARY_EXEC_WBINVD_EXITING; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 975 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS2, |
| 976 | &_cpu_based_2nd_exec_control) < 0) |
| 977 | return -EIO; |
| 978 | } |
| 979 | #ifndef CONFIG_X86_64 |
| 980 | if (!(_cpu_based_2nd_exec_control & |
| 981 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) |
| 982 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; |
| 983 | #endif |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 984 | |
| 985 | min = 0; |
| 986 | #ifdef CONFIG_X86_64 |
| 987 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; |
| 988 | #endif |
| 989 | opt = 0; |
| 990 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, |
| 991 | &_vmexit_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 992 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 993 | |
| 994 | min = opt = 0; |
| 995 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, |
| 996 | &_vmentry_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 997 | return -EIO; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 998 | |
Nguyen Anh Quynh | c68876f | 2006-12-29 16:49:54 -0800 | [diff] [blame] | 999 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1000 | |
| 1001 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ |
| 1002 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1003 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1004 | |
| 1005 | #ifdef CONFIG_X86_64 |
| 1006 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ |
| 1007 | if (vmx_msr_high & (1u<<16)) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1008 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1009 | #endif |
| 1010 | |
| 1011 | /* Require Write-Back (WB) memory type for VMCS accesses. */ |
| 1012 | if (((vmx_msr_high >> 18) & 15) != 6) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1013 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1014 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1015 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
| 1016 | vmcs_conf->order = get_order(vmcs_config.size); |
| 1017 | vmcs_conf->revision_id = vmx_msr_low; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1018 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1019 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
| 1020 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1021 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1022 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
| 1023 | vmcs_conf->vmentry_ctrl = _vmentry_control; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1024 | |
| 1025 | return 0; |
Nguyen Anh Quynh | c68876f | 2006-12-29 16:49:54 -0800 | [diff] [blame] | 1026 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1027 | |
| 1028 | static struct vmcs *alloc_vmcs_cpu(int cpu) |
| 1029 | { |
| 1030 | int node = cpu_to_node(cpu); |
| 1031 | struct page *pages; |
| 1032 | struct vmcs *vmcs; |
| 1033 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1034 | pages = alloc_pages_node(node, GFP_KERNEL, vmcs_config.order); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1035 | if (!pages) |
| 1036 | return NULL; |
| 1037 | vmcs = page_address(pages); |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1038 | memset(vmcs, 0, vmcs_config.size); |
| 1039 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1040 | return vmcs; |
| 1041 | } |
| 1042 | |
| 1043 | static struct vmcs *alloc_vmcs(void) |
| 1044 | { |
Ingo Molnar | d3b2c33 | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 1045 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1046 | } |
| 1047 | |
| 1048 | static void free_vmcs(struct vmcs *vmcs) |
| 1049 | { |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1050 | free_pages((unsigned long)vmcs, vmcs_config.order); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1051 | } |
| 1052 | |
Sam Ravnborg | 3995958 | 2007-06-01 00:47:13 -0700 | [diff] [blame] | 1053 | static void free_kvm_area(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1054 | { |
| 1055 | int cpu; |
| 1056 | |
| 1057 | for_each_online_cpu(cpu) |
| 1058 | free_vmcs(per_cpu(vmxarea, cpu)); |
| 1059 | } |
| 1060 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1061 | static __init int alloc_kvm_area(void) |
| 1062 | { |
| 1063 | int cpu; |
| 1064 | |
| 1065 | for_each_online_cpu(cpu) { |
| 1066 | struct vmcs *vmcs; |
| 1067 | |
| 1068 | vmcs = alloc_vmcs_cpu(cpu); |
| 1069 | if (!vmcs) { |
| 1070 | free_kvm_area(); |
| 1071 | return -ENOMEM; |
| 1072 | } |
| 1073 | |
| 1074 | per_cpu(vmxarea, cpu) = vmcs; |
| 1075 | } |
| 1076 | return 0; |
| 1077 | } |
| 1078 | |
| 1079 | static __init int hardware_setup(void) |
| 1080 | { |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1081 | if (setup_vmcs_config(&vmcs_config) < 0) |
| 1082 | return -EIO; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1083 | return alloc_kvm_area(); |
| 1084 | } |
| 1085 | |
| 1086 | static __exit void hardware_unsetup(void) |
| 1087 | { |
| 1088 | free_kvm_area(); |
| 1089 | } |
| 1090 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1091 | static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save) |
| 1092 | { |
| 1093 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1094 | |
Avi Kivity | 6af11b9 | 2007-03-19 13:18:10 +0200 | [diff] [blame] | 1095 | if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1096 | vmcs_write16(sf->selector, save->selector); |
| 1097 | vmcs_writel(sf->base, save->base); |
| 1098 | vmcs_write32(sf->limit, save->limit); |
| 1099 | vmcs_write32(sf->ar_bytes, save->ar); |
| 1100 | } else { |
| 1101 | u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK) |
| 1102 | << AR_DPL_SHIFT; |
| 1103 | vmcs_write32(sf->ar_bytes, 0x93 | dpl); |
| 1104 | } |
| 1105 | } |
| 1106 | |
| 1107 | static void enter_pmode(struct kvm_vcpu *vcpu) |
| 1108 | { |
| 1109 | unsigned long flags; |
| 1110 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1111 | vcpu->arch.rmode.active = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1112 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1113 | vmcs_writel(GUEST_TR_BASE, vcpu->arch.rmode.tr.base); |
| 1114 | vmcs_write32(GUEST_TR_LIMIT, vcpu->arch.rmode.tr.limit); |
| 1115 | vmcs_write32(GUEST_TR_AR_BYTES, vcpu->arch.rmode.tr.ar); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1116 | |
| 1117 | flags = vmcs_readl(GUEST_RFLAGS); |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 1118 | flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1119 | flags |= (vcpu->arch.rmode.save_iopl << IOPL_SHIFT); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1120 | vmcs_writel(GUEST_RFLAGS, flags); |
| 1121 | |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 1122 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
| 1123 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1124 | |
| 1125 | update_exception_bitmap(vcpu); |
| 1126 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1127 | fix_pmode_dataseg(VCPU_SREG_ES, &vcpu->arch.rmode.es); |
| 1128 | fix_pmode_dataseg(VCPU_SREG_DS, &vcpu->arch.rmode.ds); |
| 1129 | fix_pmode_dataseg(VCPU_SREG_GS, &vcpu->arch.rmode.gs); |
| 1130 | fix_pmode_dataseg(VCPU_SREG_FS, &vcpu->arch.rmode.fs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1131 | |
| 1132 | vmcs_write16(GUEST_SS_SELECTOR, 0); |
| 1133 | vmcs_write32(GUEST_SS_AR_BYTES, 0x93); |
| 1134 | |
| 1135 | vmcs_write16(GUEST_CS_SELECTOR, |
| 1136 | vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK); |
| 1137 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); |
| 1138 | } |
| 1139 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1140 | static gva_t rmode_tss_base(struct kvm *kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1141 | { |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 1142 | if (!kvm->arch.tss_addr) { |
Izik Eidus | cbc9402 | 2007-10-25 00:29:55 +0200 | [diff] [blame] | 1143 | gfn_t base_gfn = kvm->memslots[0].base_gfn + |
| 1144 | kvm->memslots[0].npages - 3; |
| 1145 | return base_gfn << PAGE_SHIFT; |
| 1146 | } |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 1147 | return kvm->arch.tss_addr; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1148 | } |
| 1149 | |
| 1150 | static void fix_rmode_seg(int seg, struct kvm_save_segment *save) |
| 1151 | { |
| 1152 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1153 | |
| 1154 | save->selector = vmcs_read16(sf->selector); |
| 1155 | save->base = vmcs_readl(sf->base); |
| 1156 | save->limit = vmcs_read32(sf->limit); |
| 1157 | save->ar = vmcs_read32(sf->ar_bytes); |
Jan Kiszka | 15b00f3 | 2007-11-19 10:21:45 +0100 | [diff] [blame] | 1158 | vmcs_write16(sf->selector, save->base >> 4); |
| 1159 | vmcs_write32(sf->base, save->base & 0xfffff); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1160 | vmcs_write32(sf->limit, 0xffff); |
| 1161 | vmcs_write32(sf->ar_bytes, 0xf3); |
| 1162 | } |
| 1163 | |
| 1164 | static void enter_rmode(struct kvm_vcpu *vcpu) |
| 1165 | { |
| 1166 | unsigned long flags; |
| 1167 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1168 | vcpu->arch.rmode.active = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1169 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1170 | vcpu->arch.rmode.tr.base = vmcs_readl(GUEST_TR_BASE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1171 | vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); |
| 1172 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1173 | vcpu->arch.rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1174 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
| 1175 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1176 | vcpu->arch.rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1177 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
| 1178 | |
| 1179 | flags = vmcs_readl(GUEST_RFLAGS); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1180 | vcpu->arch.rmode.save_iopl |
| 1181 | = (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1182 | |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 1183 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1184 | |
| 1185 | vmcs_writel(GUEST_RFLAGS, flags); |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 1186 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1187 | update_exception_bitmap(vcpu); |
| 1188 | |
| 1189 | vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4); |
| 1190 | vmcs_write32(GUEST_SS_LIMIT, 0xffff); |
| 1191 | vmcs_write32(GUEST_SS_AR_BYTES, 0xf3); |
| 1192 | |
| 1193 | vmcs_write32(GUEST_CS_AR_BYTES, 0xf3); |
Michael Riepe | abacf8d | 2006-12-22 01:05:45 -0800 | [diff] [blame] | 1194 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
Avi Kivity | 8cb5b03 | 2007-03-20 18:40:40 +0200 | [diff] [blame] | 1195 | if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000) |
| 1196 | vmcs_writel(GUEST_CS_BASE, 0xf0000); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1197 | vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4); |
| 1198 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1199 | fix_rmode_seg(VCPU_SREG_ES, &vcpu->arch.rmode.es); |
| 1200 | fix_rmode_seg(VCPU_SREG_DS, &vcpu->arch.rmode.ds); |
| 1201 | fix_rmode_seg(VCPU_SREG_GS, &vcpu->arch.rmode.gs); |
| 1202 | fix_rmode_seg(VCPU_SREG_FS, &vcpu->arch.rmode.fs); |
Avi Kivity | 75880a0 | 2007-06-20 11:20:04 +0300 | [diff] [blame] | 1203 | |
Eddie Dong | 8668a3c | 2007-10-10 14:26:45 +0800 | [diff] [blame] | 1204 | kvm_mmu_reset_context(vcpu); |
Avi Kivity | 75880a0 | 2007-06-20 11:20:04 +0300 | [diff] [blame] | 1205 | init_rmode_tss(vcpu->kvm); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1206 | } |
| 1207 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1208 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1209 | |
| 1210 | static void enter_lmode(struct kvm_vcpu *vcpu) |
| 1211 | { |
| 1212 | u32 guest_tr_ar; |
| 1213 | |
| 1214 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); |
| 1215 | if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) { |
| 1216 | printk(KERN_DEBUG "%s: tss fixup for long mode. \n", |
| 1217 | __FUNCTION__); |
| 1218 | vmcs_write32(GUEST_TR_AR_BYTES, |
| 1219 | (guest_tr_ar & ~AR_TYPE_MASK) |
| 1220 | | AR_TYPE_BUSY_64_TSS); |
| 1221 | } |
| 1222 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1223 | vcpu->arch.shadow_efer |= EFER_LMA; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1224 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1225 | 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] | 1226 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1227 | vmcs_read32(VM_ENTRY_CONTROLS) |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1228 | | VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1229 | } |
| 1230 | |
| 1231 | static void exit_lmode(struct kvm_vcpu *vcpu) |
| 1232 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1233 | vcpu->arch.shadow_efer &= ~EFER_LMA; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1234 | |
| 1235 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1236 | vmcs_read32(VM_ENTRY_CONTROLS) |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1237 | & ~VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1238 | } |
| 1239 | |
| 1240 | #endif |
| 1241 | |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 1242 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
Avi Kivity | 399badf | 2007-01-05 16:36:38 -0800 | [diff] [blame] | 1243 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1244 | vcpu->arch.cr4 &= KVM_GUEST_CR4_MASK; |
| 1245 | vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK; |
Avi Kivity | 399badf | 2007-01-05 16:36:38 -0800 | [diff] [blame] | 1246 | } |
| 1247 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1248 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
| 1249 | { |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1250 | vmx_fpu_deactivate(vcpu); |
| 1251 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1252 | if (vcpu->arch.rmode.active && (cr0 & X86_CR0_PE)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1253 | enter_pmode(vcpu); |
| 1254 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1255 | if (!vcpu->arch.rmode.active && !(cr0 & X86_CR0_PE)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1256 | enter_rmode(vcpu); |
| 1257 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1258 | #ifdef CONFIG_X86_64 |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1259 | if (vcpu->arch.shadow_efer & EFER_LME) { |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1260 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1261 | enter_lmode(vcpu); |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1262 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1263 | exit_lmode(vcpu); |
| 1264 | } |
| 1265 | #endif |
| 1266 | |
| 1267 | vmcs_writel(CR0_READ_SHADOW, cr0); |
| 1268 | vmcs_writel(GUEST_CR0, |
| 1269 | (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1270 | vcpu->arch.cr0 = cr0; |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1271 | |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1272 | if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE)) |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1273 | vmx_fpu_activate(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1274 | } |
| 1275 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1276 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
| 1277 | { |
| 1278 | vmcs_writel(GUEST_CR3, cr3); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1279 | if (vcpu->arch.cr0 & X86_CR0_PE) |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1280 | vmx_fpu_deactivate(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1281 | } |
| 1282 | |
| 1283 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
| 1284 | { |
| 1285 | vmcs_writel(CR4_READ_SHADOW, cr4); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1286 | vmcs_writel(GUEST_CR4, cr4 | (vcpu->arch.rmode.active ? |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1287 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON)); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1288 | vcpu->arch.cr4 = cr4; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1289 | } |
| 1290 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1291 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1292 | |
| 1293 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
| 1294 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1295 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 1296 | struct kvm_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1297 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1298 | vcpu->arch.shadow_efer = efer; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1299 | if (efer & EFER_LMA) { |
| 1300 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1301 | vmcs_read32(VM_ENTRY_CONTROLS) | |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1302 | VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1303 | msr->data = efer; |
| 1304 | |
| 1305 | } else { |
| 1306 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1307 | vmcs_read32(VM_ENTRY_CONTROLS) & |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1308 | ~VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1309 | |
| 1310 | msr->data = efer & ~EFER_LME; |
| 1311 | } |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1312 | setup_msrs(vmx); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1313 | } |
| 1314 | |
| 1315 | #endif |
| 1316 | |
| 1317 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
| 1318 | { |
| 1319 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1320 | |
| 1321 | return vmcs_readl(sf->base); |
| 1322 | } |
| 1323 | |
| 1324 | static void vmx_get_segment(struct kvm_vcpu *vcpu, |
| 1325 | struct kvm_segment *var, int seg) |
| 1326 | { |
| 1327 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1328 | u32 ar; |
| 1329 | |
| 1330 | var->base = vmcs_readl(sf->base); |
| 1331 | var->limit = vmcs_read32(sf->limit); |
| 1332 | var->selector = vmcs_read16(sf->selector); |
| 1333 | ar = vmcs_read32(sf->ar_bytes); |
| 1334 | if (ar & AR_UNUSABLE_MASK) |
| 1335 | ar = 0; |
| 1336 | var->type = ar & 15; |
| 1337 | var->s = (ar >> 4) & 1; |
| 1338 | var->dpl = (ar >> 5) & 3; |
| 1339 | var->present = (ar >> 7) & 1; |
| 1340 | var->avl = (ar >> 12) & 1; |
| 1341 | var->l = (ar >> 13) & 1; |
| 1342 | var->db = (ar >> 14) & 1; |
| 1343 | var->g = (ar >> 15) & 1; |
| 1344 | var->unusable = (ar >> 16) & 1; |
| 1345 | } |
| 1346 | |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1347 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1348 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1349 | u32 ar; |
| 1350 | |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1351 | if (var->unusable) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1352 | ar = 1 << 16; |
| 1353 | else { |
| 1354 | ar = var->type & 15; |
| 1355 | ar |= (var->s & 1) << 4; |
| 1356 | ar |= (var->dpl & 3) << 5; |
| 1357 | ar |= (var->present & 1) << 7; |
| 1358 | ar |= (var->avl & 1) << 12; |
| 1359 | ar |= (var->l & 1) << 13; |
| 1360 | ar |= (var->db & 1) << 14; |
| 1361 | ar |= (var->g & 1) << 15; |
| 1362 | } |
Uri Lublin | f7fbf1f | 2006-12-13 00:34:00 -0800 | [diff] [blame] | 1363 | if (ar == 0) /* a 0 value means unusable */ |
| 1364 | ar = AR_UNUSABLE_MASK; |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1365 | |
| 1366 | return ar; |
| 1367 | } |
| 1368 | |
| 1369 | static void vmx_set_segment(struct kvm_vcpu *vcpu, |
| 1370 | struct kvm_segment *var, int seg) |
| 1371 | { |
| 1372 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1373 | u32 ar; |
| 1374 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1375 | if (vcpu->arch.rmode.active && seg == VCPU_SREG_TR) { |
| 1376 | vcpu->arch.rmode.tr.selector = var->selector; |
| 1377 | vcpu->arch.rmode.tr.base = var->base; |
| 1378 | vcpu->arch.rmode.tr.limit = var->limit; |
| 1379 | vcpu->arch.rmode.tr.ar = vmx_segment_access_rights(var); |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1380 | return; |
| 1381 | } |
| 1382 | vmcs_writel(sf->base, var->base); |
| 1383 | vmcs_write32(sf->limit, var->limit); |
| 1384 | vmcs_write16(sf->selector, var->selector); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1385 | if (vcpu->arch.rmode.active && var->s) { |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1386 | /* |
| 1387 | * Hack real-mode segments into vm86 compatibility. |
| 1388 | */ |
| 1389 | if (var->base == 0xffff0000 && var->selector == 0xf000) |
| 1390 | vmcs_writel(sf->base, 0xf0000); |
| 1391 | ar = 0xf3; |
| 1392 | } else |
| 1393 | ar = vmx_segment_access_rights(var); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1394 | vmcs_write32(sf->ar_bytes, ar); |
| 1395 | } |
| 1396 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1397 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
| 1398 | { |
| 1399 | u32 ar = vmcs_read32(GUEST_CS_AR_BYTES); |
| 1400 | |
| 1401 | *db = (ar >> 14) & 1; |
| 1402 | *l = (ar >> 13) & 1; |
| 1403 | } |
| 1404 | |
| 1405 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1406 | { |
| 1407 | dt->limit = vmcs_read32(GUEST_IDTR_LIMIT); |
| 1408 | dt->base = vmcs_readl(GUEST_IDTR_BASE); |
| 1409 | } |
| 1410 | |
| 1411 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1412 | { |
| 1413 | vmcs_write32(GUEST_IDTR_LIMIT, dt->limit); |
| 1414 | vmcs_writel(GUEST_IDTR_BASE, dt->base); |
| 1415 | } |
| 1416 | |
| 1417 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1418 | { |
| 1419 | dt->limit = vmcs_read32(GUEST_GDTR_LIMIT); |
| 1420 | dt->base = vmcs_readl(GUEST_GDTR_BASE); |
| 1421 | } |
| 1422 | |
| 1423 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1424 | { |
| 1425 | vmcs_write32(GUEST_GDTR_LIMIT, dt->limit); |
| 1426 | vmcs_writel(GUEST_GDTR_BASE, dt->base); |
| 1427 | } |
| 1428 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1429 | static int init_rmode_tss(struct kvm *kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1430 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1431 | gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1432 | u16 data = 0; |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1433 | int ret = 0; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1434 | int r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1435 | |
Marcelo Tosatti | 707a18a | 2008-03-18 17:42:34 -0300 | [diff] [blame^] | 1436 | down_read(&kvm->slots_lock); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1437 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
| 1438 | if (r < 0) |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1439 | goto out; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1440 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
| 1441 | r = kvm_write_guest_page(kvm, fn++, &data, 0x66, sizeof(u16)); |
| 1442 | if (r < 0) |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1443 | goto out; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1444 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
| 1445 | if (r < 0) |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1446 | goto out; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1447 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
| 1448 | if (r < 0) |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1449 | goto out; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1450 | data = ~0; |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1451 | r = kvm_write_guest_page(kvm, fn, &data, |
| 1452 | RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, |
| 1453 | sizeof(u8)); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1454 | if (r < 0) |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1455 | goto out; |
| 1456 | |
| 1457 | ret = 1; |
| 1458 | out: |
Marcelo Tosatti | 707a18a | 2008-03-18 17:42:34 -0300 | [diff] [blame^] | 1459 | up_read(&kvm->slots_lock); |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1460 | return ret; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1461 | } |
| 1462 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1463 | static void seg_setup(int seg) |
| 1464 | { |
| 1465 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1466 | |
| 1467 | vmcs_write16(sf->selector, 0); |
| 1468 | vmcs_writel(sf->base, 0); |
| 1469 | vmcs_write32(sf->limit, 0xffff); |
| 1470 | vmcs_write32(sf->ar_bytes, 0x93); |
| 1471 | } |
| 1472 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1473 | static int alloc_apic_access_page(struct kvm *kvm) |
| 1474 | { |
| 1475 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 1476 | int r = 0; |
| 1477 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1478 | down_write(&kvm->slots_lock); |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 1479 | if (kvm->arch.apic_access_page) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1480 | goto out; |
| 1481 | kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; |
| 1482 | kvm_userspace_mem.flags = 0; |
| 1483 | kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL; |
| 1484 | kvm_userspace_mem.memory_size = PAGE_SIZE; |
| 1485 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); |
| 1486 | if (r) |
| 1487 | goto out; |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1488 | |
| 1489 | down_read(¤t->mm->mmap_sem); |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 1490 | kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1491 | up_read(¤t->mm->mmap_sem); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1492 | out: |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1493 | up_write(&kvm->slots_lock); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1494 | return r; |
| 1495 | } |
| 1496 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1497 | /* |
| 1498 | * Sets up the vmcs for emulated real mode. |
| 1499 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1500 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1501 | { |
| 1502 | u32 host_sysenter_cs; |
| 1503 | u32 junk; |
| 1504 | unsigned long a; |
| 1505 | struct descriptor_table dt; |
| 1506 | int i; |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 1507 | unsigned long kvm_vmx_return; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1508 | u32 exec_control; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1509 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1510 | /* I/O */ |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 1511 | vmcs_write64(IO_BITMAP_A, page_to_phys(vmx_io_bitmap_a)); |
| 1512 | vmcs_write64(IO_BITMAP_B, page_to_phys(vmx_io_bitmap_b)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1513 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1514 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
| 1515 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1516 | /* Control */ |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1517 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, |
| 1518 | vmcs_config.pin_based_exec_ctrl); |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1519 | |
| 1520 | exec_control = vmcs_config.cpu_based_exec_ctrl; |
| 1521 | if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { |
| 1522 | exec_control &= ~CPU_BASED_TPR_SHADOW; |
| 1523 | #ifdef CONFIG_X86_64 |
| 1524 | exec_control |= CPU_BASED_CR8_STORE_EXITING | |
| 1525 | CPU_BASED_CR8_LOAD_EXITING; |
| 1526 | #endif |
| 1527 | } |
| 1528 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1529 | |
Sheng Yang | 83ff3b9 | 2007-11-21 14:33:25 +0800 | [diff] [blame] | 1530 | if (cpu_has_secondary_exec_ctrls()) { |
| 1531 | exec_control = vmcs_config.cpu_based_2nd_exec_ctrl; |
| 1532 | if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) |
| 1533 | exec_control &= |
| 1534 | ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; |
| 1535 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); |
| 1536 | } |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1537 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 1538 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf); |
| 1539 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1540 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
| 1541 | |
| 1542 | vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */ |
| 1543 | vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */ |
| 1544 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ |
| 1545 | |
| 1546 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ |
| 1547 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
| 1548 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
| 1549 | vmcs_write16(HOST_FS_SELECTOR, read_fs()); /* 22.2.4 */ |
| 1550 | vmcs_write16(HOST_GS_SELECTOR, read_gs()); /* 22.2.4 */ |
| 1551 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1552 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1553 | rdmsrl(MSR_FS_BASE, a); |
| 1554 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ |
| 1555 | rdmsrl(MSR_GS_BASE, a); |
| 1556 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ |
| 1557 | #else |
| 1558 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ |
| 1559 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ |
| 1560 | #endif |
| 1561 | |
| 1562 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ |
| 1563 | |
| 1564 | get_idt(&dt); |
| 1565 | vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */ |
| 1566 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1567 | asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return)); |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 1568 | vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */ |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 1569 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
| 1570 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); |
| 1571 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1572 | |
| 1573 | rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk); |
| 1574 | vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs); |
| 1575 | rdmsrl(MSR_IA32_SYSENTER_ESP, a); |
| 1576 | vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */ |
| 1577 | rdmsrl(MSR_IA32_SYSENTER_EIP, a); |
| 1578 | vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */ |
| 1579 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1580 | for (i = 0; i < NR_VMX_MSR; ++i) { |
| 1581 | u32 index = vmx_msr_index[i]; |
| 1582 | u32 data_low, data_high; |
| 1583 | u64 data; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 1584 | int j = vmx->nmsrs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1585 | |
| 1586 | if (rdmsr_safe(index, &data_low, &data_high) < 0) |
| 1587 | continue; |
Avi Kivity | 432bd6c | 2007-01-31 23:48:13 -0800 | [diff] [blame] | 1588 | if (wrmsr_safe(index, data_low, data_high) < 0) |
| 1589 | continue; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1590 | data = data_low | ((u64)data_high << 32); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 1591 | vmx->host_msrs[j].index = index; |
| 1592 | vmx->host_msrs[j].reserved = 0; |
| 1593 | vmx->host_msrs[j].data = data; |
| 1594 | vmx->guest_msrs[j] = vmx->host_msrs[j]; |
| 1595 | ++vmx->nmsrs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1596 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1597 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1598 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1599 | |
| 1600 | /* 22.2.1, 20.8.1 */ |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1601 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl); |
| 1602 | |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 1603 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
| 1604 | vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK); |
| 1605 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1606 | |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 1607 | return 0; |
| 1608 | } |
| 1609 | |
| 1610 | static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) |
| 1611 | { |
| 1612 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 1613 | u64 msr; |
| 1614 | int ret; |
| 1615 | |
| 1616 | if (!init_rmode_tss(vmx->vcpu.kvm)) { |
| 1617 | ret = -ENOMEM; |
| 1618 | goto out; |
| 1619 | } |
| 1620 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1621 | vmx->vcpu.arch.rmode.active = 0; |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 1622 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1623 | vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 1624 | set_cr8(&vmx->vcpu, 0); |
| 1625 | msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
| 1626 | if (vmx->vcpu.vcpu_id == 0) |
| 1627 | msr |= MSR_IA32_APICBASE_BSP; |
| 1628 | kvm_set_apic_base(&vmx->vcpu, msr); |
| 1629 | |
| 1630 | fx_init(&vmx->vcpu); |
| 1631 | |
| 1632 | /* |
| 1633 | * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode |
| 1634 | * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh. |
| 1635 | */ |
| 1636 | if (vmx->vcpu.vcpu_id == 0) { |
| 1637 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); |
| 1638 | vmcs_writel(GUEST_CS_BASE, 0x000f0000); |
| 1639 | } else { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1640 | vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8); |
| 1641 | vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12); |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 1642 | } |
| 1643 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
| 1644 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); |
| 1645 | |
| 1646 | seg_setup(VCPU_SREG_DS); |
| 1647 | seg_setup(VCPU_SREG_ES); |
| 1648 | seg_setup(VCPU_SREG_FS); |
| 1649 | seg_setup(VCPU_SREG_GS); |
| 1650 | seg_setup(VCPU_SREG_SS); |
| 1651 | |
| 1652 | vmcs_write16(GUEST_TR_SELECTOR, 0); |
| 1653 | vmcs_writel(GUEST_TR_BASE, 0); |
| 1654 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); |
| 1655 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
| 1656 | |
| 1657 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); |
| 1658 | vmcs_writel(GUEST_LDTR_BASE, 0); |
| 1659 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); |
| 1660 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); |
| 1661 | |
| 1662 | vmcs_write32(GUEST_SYSENTER_CS, 0); |
| 1663 | vmcs_writel(GUEST_SYSENTER_ESP, 0); |
| 1664 | vmcs_writel(GUEST_SYSENTER_EIP, 0); |
| 1665 | |
| 1666 | vmcs_writel(GUEST_RFLAGS, 0x02); |
| 1667 | if (vmx->vcpu.vcpu_id == 0) |
| 1668 | vmcs_writel(GUEST_RIP, 0xfff0); |
| 1669 | else |
| 1670 | vmcs_writel(GUEST_RIP, 0); |
| 1671 | vmcs_writel(GUEST_RSP, 0); |
| 1672 | |
| 1673 | /* todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0 */ |
| 1674 | vmcs_writel(GUEST_DR7, 0x400); |
| 1675 | |
| 1676 | vmcs_writel(GUEST_GDTR_BASE, 0); |
| 1677 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); |
| 1678 | |
| 1679 | vmcs_writel(GUEST_IDTR_BASE, 0); |
| 1680 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); |
| 1681 | |
| 1682 | vmcs_write32(GUEST_ACTIVITY_STATE, 0); |
| 1683 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); |
| 1684 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); |
| 1685 | |
| 1686 | guest_write_tsc(0); |
| 1687 | |
| 1688 | /* Special registers */ |
| 1689 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); |
| 1690 | |
| 1691 | setup_msrs(vmx); |
| 1692 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1693 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
| 1694 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1695 | if (cpu_has_vmx_tpr_shadow()) { |
| 1696 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); |
| 1697 | if (vm_need_tpr_shadow(vmx->vcpu.kvm)) |
| 1698 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1699 | page_to_phys(vmx->vcpu.arch.apic->regs_page)); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1700 | vmcs_write32(TPR_THRESHOLD, 0); |
| 1701 | } |
| 1702 | |
| 1703 | if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) |
| 1704 | vmcs_write64(APIC_ACCESS_ADDR, |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 1705 | page_to_phys(vmx->vcpu.kvm->arch.apic_access_page)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1706 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1707 | vmx->vcpu.arch.cr0 = 0x60000010; |
| 1708 | vmx_set_cr0(&vmx->vcpu, vmx->vcpu.arch.cr0); /* enter rmode */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1709 | vmx_set_cr4(&vmx->vcpu, 0); |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1710 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1711 | vmx_set_efer(&vmx->vcpu, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1712 | #endif |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1713 | vmx_fpu_activate(&vmx->vcpu); |
| 1714 | update_exception_bitmap(&vmx->vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1715 | |
| 1716 | return 0; |
| 1717 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1718 | out: |
| 1719 | return ret; |
| 1720 | } |
| 1721 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1722 | static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq) |
| 1723 | { |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 1724 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 1725 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1726 | if (vcpu->arch.rmode.active) { |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 1727 | vmx->rmode.irq.pending = true; |
| 1728 | vmx->rmode.irq.vector = irq; |
| 1729 | vmx->rmode.irq.rip = vmcs_readl(GUEST_RIP); |
Avi Kivity | 9c5623e | 2007-11-08 18:19:20 +0200 | [diff] [blame] | 1730 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 1731 | irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK); |
| 1732 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1); |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 1733 | vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip - 1); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1734 | return; |
| 1735 | } |
| 1736 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 1737 | irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); |
| 1738 | } |
| 1739 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1740 | static void kvm_do_inject_irq(struct kvm_vcpu *vcpu) |
| 1741 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1742 | int word_index = __ffs(vcpu->arch.irq_summary); |
| 1743 | int bit_index = __ffs(vcpu->arch.irq_pending[word_index]); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1744 | int irq = word_index * BITS_PER_LONG + bit_index; |
| 1745 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1746 | clear_bit(bit_index, &vcpu->arch.irq_pending[word_index]); |
| 1747 | if (!vcpu->arch.irq_pending[word_index]) |
| 1748 | clear_bit(word_index, &vcpu->arch.irq_summary); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1749 | vmx_inject_irq(vcpu, irq); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1750 | } |
| 1751 | |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1752 | |
| 1753 | static void do_interrupt_requests(struct kvm_vcpu *vcpu, |
| 1754 | struct kvm_run *kvm_run) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1755 | { |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1756 | u32 cpu_based_vm_exec_control; |
| 1757 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1758 | vcpu->arch.interrupt_window_open = |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1759 | ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
| 1760 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); |
| 1761 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1762 | if (vcpu->arch.interrupt_window_open && |
| 1763 | vcpu->arch.irq_summary && |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1764 | !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1765 | /* |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1766 | * If interrupts enabled, and not blocked by sti or mov ss. Good. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1767 | */ |
| 1768 | kvm_do_inject_irq(vcpu); |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1769 | |
| 1770 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1771 | if (!vcpu->arch.interrupt_window_open && |
| 1772 | (vcpu->arch.irq_summary || kvm_run->request_interrupt_window)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1773 | /* |
| 1774 | * Interrupts blocked. Wait for unblock. |
| 1775 | */ |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1776 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; |
| 1777 | else |
| 1778 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; |
| 1779 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1780 | } |
| 1781 | |
Izik Eidus | cbc9402 | 2007-10-25 00:29:55 +0200 | [diff] [blame] | 1782 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
| 1783 | { |
| 1784 | int ret; |
| 1785 | struct kvm_userspace_memory_region tss_mem = { |
| 1786 | .slot = 8, |
| 1787 | .guest_phys_addr = addr, |
| 1788 | .memory_size = PAGE_SIZE * 3, |
| 1789 | .flags = 0, |
| 1790 | }; |
| 1791 | |
| 1792 | ret = kvm_set_memory_region(kvm, &tss_mem, 0); |
| 1793 | if (ret) |
| 1794 | return ret; |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 1795 | kvm->arch.tss_addr = addr; |
Izik Eidus | cbc9402 | 2007-10-25 00:29:55 +0200 | [diff] [blame] | 1796 | return 0; |
| 1797 | } |
| 1798 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1799 | static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu) |
| 1800 | { |
| 1801 | struct kvm_guest_debug *dbg = &vcpu->guest_debug; |
| 1802 | |
| 1803 | set_debugreg(dbg->bp[0], 0); |
| 1804 | set_debugreg(dbg->bp[1], 1); |
| 1805 | set_debugreg(dbg->bp[2], 2); |
| 1806 | set_debugreg(dbg->bp[3], 3); |
| 1807 | |
| 1808 | if (dbg->singlestep) { |
| 1809 | unsigned long flags; |
| 1810 | |
| 1811 | flags = vmcs_readl(GUEST_RFLAGS); |
| 1812 | flags |= X86_EFLAGS_TF | X86_EFLAGS_RF; |
| 1813 | vmcs_writel(GUEST_RFLAGS, flags); |
| 1814 | } |
| 1815 | } |
| 1816 | |
| 1817 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, |
| 1818 | int vec, u32 err_code) |
| 1819 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1820 | if (!vcpu->arch.rmode.active) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1821 | return 0; |
| 1822 | |
Nitin A Kamble | b3f3770 | 2007-05-17 15:50:34 +0300 | [diff] [blame] | 1823 | /* |
| 1824 | * Instruction with address size override prefix opcode 0x67 |
| 1825 | * Cause the #SS fault with 0 error code in VM86 mode. |
| 1826 | */ |
| 1827 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) |
Laurent Vivier | 3427318 | 2007-09-18 11:27:37 +0200 | [diff] [blame] | 1828 | if (emulate_instruction(vcpu, NULL, 0, 0, 0) == EMULATE_DONE) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1829 | return 1; |
| 1830 | return 0; |
| 1831 | } |
| 1832 | |
| 1833 | static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1834 | { |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 1835 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1836 | u32 intr_info, error_code; |
| 1837 | unsigned long cr2, rip; |
| 1838 | u32 vect_info; |
| 1839 | enum emulation_result er; |
| 1840 | |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 1841 | vect_info = vmx->idt_vectoring_info; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1842 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
| 1843 | |
| 1844 | if ((vect_info & VECTORING_INFO_VALID_MASK) && |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1845 | !is_page_fault(intr_info)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1846 | printk(KERN_ERR "%s: unexpected, vectoring info 0x%x " |
| 1847 | "intr info 0x%x\n", __FUNCTION__, vect_info, intr_info); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1848 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1849 | if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1850 | int irq = vect_info & VECTORING_INFO_VECTOR_MASK; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1851 | set_bit(irq, vcpu->arch.irq_pending); |
| 1852 | set_bit(irq / BITS_PER_LONG, &vcpu->arch.irq_summary); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1853 | } |
| 1854 | |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 1855 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ |
| 1856 | return 1; /* already handled by vmx_vcpu_run() */ |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 1857 | |
| 1858 | if (is_no_device(intr_info)) { |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1859 | vmx_fpu_activate(vcpu); |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 1860 | return 1; |
| 1861 | } |
| 1862 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 1863 | if (is_invalid_opcode(intr_info)) { |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 1864 | er = emulate_instruction(vcpu, kvm_run, 0, 0, EMULTYPE_TRAP_UD); |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 1865 | if (er != EMULATE_DONE) |
Avi Kivity | 7ee5d940 | 2007-11-25 15:22:50 +0200 | [diff] [blame] | 1866 | kvm_queue_exception(vcpu, UD_VECTOR); |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 1867 | return 1; |
| 1868 | } |
| 1869 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1870 | error_code = 0; |
| 1871 | rip = vmcs_readl(GUEST_RIP); |
| 1872 | if (intr_info & INTR_INFO_DELIEVER_CODE_MASK) |
| 1873 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
| 1874 | if (is_page_fault(intr_info)) { |
| 1875 | cr2 = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 3067714 | 2007-10-28 18:48:59 +0200 | [diff] [blame] | 1876 | return kvm_mmu_page_fault(vcpu, cr2, error_code); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1877 | } |
| 1878 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1879 | if (vcpu->arch.rmode.active && |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1880 | handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK, |
Avi Kivity | 72d6e5a | 2007-06-05 16:15:51 +0300 | [diff] [blame] | 1881 | error_code)) { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1882 | if (vcpu->arch.halt_request) { |
| 1883 | vcpu->arch.halt_request = 0; |
Avi Kivity | 72d6e5a | 2007-06-05 16:15:51 +0300 | [diff] [blame] | 1884 | return kvm_emulate_halt(vcpu); |
| 1885 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1886 | return 1; |
Avi Kivity | 72d6e5a | 2007-06-05 16:15:51 +0300 | [diff] [blame] | 1887 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1888 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1889 | if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) == |
| 1890 | (INTR_TYPE_EXCEPTION | 1)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1891 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
| 1892 | return 0; |
| 1893 | } |
| 1894 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; |
| 1895 | kvm_run->ex.exception = intr_info & INTR_INFO_VECTOR_MASK; |
| 1896 | kvm_run->ex.error_code = error_code; |
| 1897 | return 0; |
| 1898 | } |
| 1899 | |
| 1900 | static int handle_external_interrupt(struct kvm_vcpu *vcpu, |
| 1901 | struct kvm_run *kvm_run) |
| 1902 | { |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1903 | ++vcpu->stat.irq_exits; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1904 | return 1; |
| 1905 | } |
| 1906 | |
Avi Kivity | 988ad74 | 2007-02-12 00:54:36 -0800 | [diff] [blame] | 1907 | static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1908 | { |
| 1909 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; |
| 1910 | return 0; |
| 1911 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1912 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1913 | static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1914 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1915 | unsigned long exit_qualification; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1916 | int size, down, in, string, rep; |
| 1917 | unsigned port; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1918 | |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1919 | ++vcpu->stat.io_exits; |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1920 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1921 | string = (exit_qualification & 16) != 0; |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 1922 | |
| 1923 | if (string) { |
Laurent Vivier | 3427318 | 2007-09-18 11:27:37 +0200 | [diff] [blame] | 1924 | if (emulate_instruction(vcpu, |
| 1925 | kvm_run, 0, 0, 0) == EMULATE_DO_MMIO) |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 1926 | return 0; |
| 1927 | return 1; |
| 1928 | } |
| 1929 | |
| 1930 | size = (exit_qualification & 7) + 1; |
| 1931 | in = (exit_qualification & 8) != 0; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1932 | down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1933 | rep = (exit_qualification & 32) != 0; |
| 1934 | port = exit_qualification >> 16; |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 1935 | |
Laurent Vivier | 3090dd7 | 2007-08-05 10:43:32 +0300 | [diff] [blame] | 1936 | return kvm_emulate_pio(vcpu, kvm_run, in, size, port); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1937 | } |
| 1938 | |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 1939 | static void |
| 1940 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) |
| 1941 | { |
| 1942 | /* |
| 1943 | * Patch in the VMCALL instruction: |
| 1944 | */ |
| 1945 | hypercall[0] = 0x0f; |
| 1946 | hypercall[1] = 0x01; |
| 1947 | hypercall[2] = 0xc1; |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 1948 | } |
| 1949 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1950 | static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1951 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1952 | unsigned long exit_qualification; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1953 | int cr; |
| 1954 | int reg; |
| 1955 | |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1956 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1957 | cr = exit_qualification & 15; |
| 1958 | reg = (exit_qualification >> 8) & 15; |
| 1959 | switch ((exit_qualification >> 4) & 3) { |
| 1960 | case 0: /* mov to cr */ |
| 1961 | switch (cr) { |
| 1962 | case 0: |
| 1963 | vcpu_load_rsp_rip(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1964 | set_cr0(vcpu, vcpu->arch.regs[reg]); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1965 | skip_emulated_instruction(vcpu); |
| 1966 | return 1; |
| 1967 | case 3: |
| 1968 | vcpu_load_rsp_rip(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1969 | set_cr3(vcpu, vcpu->arch.regs[reg]); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1970 | skip_emulated_instruction(vcpu); |
| 1971 | return 1; |
| 1972 | case 4: |
| 1973 | vcpu_load_rsp_rip(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1974 | set_cr4(vcpu, vcpu->arch.regs[reg]); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1975 | skip_emulated_instruction(vcpu); |
| 1976 | return 1; |
| 1977 | case 8: |
| 1978 | vcpu_load_rsp_rip(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1979 | set_cr8(vcpu, vcpu->arch.regs[reg]); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1980 | skip_emulated_instruction(vcpu); |
Avi Kivity | e531406 | 2007-12-06 16:32:45 +0200 | [diff] [blame] | 1981 | if (irqchip_in_kernel(vcpu->kvm)) |
| 1982 | return 1; |
Yang, Sheng | 253abde | 2007-08-16 13:01:00 +0300 | [diff] [blame] | 1983 | kvm_run->exit_reason = KVM_EXIT_SET_TPR; |
| 1984 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1985 | }; |
| 1986 | break; |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 1987 | case 2: /* clts */ |
| 1988 | vcpu_load_rsp_rip(vcpu); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1989 | vmx_fpu_deactivate(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1990 | vcpu->arch.cr0 &= ~X86_CR0_TS; |
| 1991 | vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1992 | vmx_fpu_activate(vcpu); |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 1993 | skip_emulated_instruction(vcpu); |
| 1994 | return 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1995 | case 1: /*mov from cr*/ |
| 1996 | switch (cr) { |
| 1997 | case 3: |
| 1998 | vcpu_load_rsp_rip(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1999 | vcpu->arch.regs[reg] = vcpu->arch.cr3; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2000 | vcpu_put_rsp_rip(vcpu); |
| 2001 | skip_emulated_instruction(vcpu); |
| 2002 | return 1; |
| 2003 | case 8: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2004 | vcpu_load_rsp_rip(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2005 | vcpu->arch.regs[reg] = get_cr8(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2006 | vcpu_put_rsp_rip(vcpu); |
| 2007 | skip_emulated_instruction(vcpu); |
| 2008 | return 1; |
| 2009 | } |
| 2010 | break; |
| 2011 | case 3: /* lmsw */ |
| 2012 | lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f); |
| 2013 | |
| 2014 | skip_emulated_instruction(vcpu); |
| 2015 | return 1; |
| 2016 | default: |
| 2017 | break; |
| 2018 | } |
| 2019 | kvm_run->exit_reason = 0; |
Rusty Russell | f024247 | 2007-08-01 10:48:02 +1000 | [diff] [blame] | 2020 | pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2021 | (int)(exit_qualification >> 4) & 3, cr); |
| 2022 | return 0; |
| 2023 | } |
| 2024 | |
| 2025 | static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2026 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 2027 | unsigned long exit_qualification; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2028 | unsigned long val; |
| 2029 | int dr, reg; |
| 2030 | |
| 2031 | /* |
| 2032 | * FIXME: this code assumes the host is debugging the guest. |
| 2033 | * need to deal with guest debugging itself too. |
| 2034 | */ |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 2035 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2036 | dr = exit_qualification & 7; |
| 2037 | reg = (exit_qualification >> 8) & 15; |
| 2038 | vcpu_load_rsp_rip(vcpu); |
| 2039 | if (exit_qualification & 16) { |
| 2040 | /* mov from dr */ |
| 2041 | switch (dr) { |
| 2042 | case 6: |
| 2043 | val = 0xffff0ff0; |
| 2044 | break; |
| 2045 | case 7: |
| 2046 | val = 0x400; |
| 2047 | break; |
| 2048 | default: |
| 2049 | val = 0; |
| 2050 | } |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2051 | vcpu->arch.regs[reg] = val; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2052 | } else { |
| 2053 | /* mov to dr */ |
| 2054 | } |
| 2055 | vcpu_put_rsp_rip(vcpu); |
| 2056 | skip_emulated_instruction(vcpu); |
| 2057 | return 1; |
| 2058 | } |
| 2059 | |
| 2060 | static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2061 | { |
Avi Kivity | 06465c5 | 2007-02-28 20:46:53 +0200 | [diff] [blame] | 2062 | kvm_emulate_cpuid(vcpu); |
| 2063 | return 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2064 | } |
| 2065 | |
| 2066 | static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2067 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2068 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2069 | u64 data; |
| 2070 | |
| 2071 | if (vmx_get_msr(vcpu, ecx, &data)) { |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 2072 | kvm_inject_gp(vcpu, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2073 | return 1; |
| 2074 | } |
| 2075 | |
| 2076 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2077 | vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u; |
| 2078 | vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2079 | skip_emulated_instruction(vcpu); |
| 2080 | return 1; |
| 2081 | } |
| 2082 | |
| 2083 | static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2084 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2085 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
| 2086 | u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u) |
| 2087 | | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2088 | |
| 2089 | if (vmx_set_msr(vcpu, ecx, data) != 0) { |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 2090 | kvm_inject_gp(vcpu, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2091 | return 1; |
| 2092 | } |
| 2093 | |
| 2094 | skip_emulated_instruction(vcpu); |
| 2095 | return 1; |
| 2096 | } |
| 2097 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2098 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu, |
| 2099 | struct kvm_run *kvm_run) |
| 2100 | { |
| 2101 | return 1; |
| 2102 | } |
| 2103 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2104 | static int handle_interrupt_window(struct kvm_vcpu *vcpu, |
| 2105 | struct kvm_run *kvm_run) |
| 2106 | { |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2107 | u32 cpu_based_vm_exec_control; |
| 2108 | |
| 2109 | /* clear pending irq */ |
| 2110 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 2111 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; |
| 2112 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2113 | /* |
| 2114 | * If the user space waits to inject interrupts, exit as soon as |
| 2115 | * possible |
| 2116 | */ |
| 2117 | if (kvm_run->request_interrupt_window && |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2118 | !vcpu->arch.irq_summary) { |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2119 | kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2120 | ++vcpu->stat.irq_window_exits; |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2121 | return 0; |
| 2122 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2123 | return 1; |
| 2124 | } |
| 2125 | |
| 2126 | static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2127 | { |
| 2128 | skip_emulated_instruction(vcpu); |
Avi Kivity | d3bef15 | 2007-06-05 15:53:05 +0300 | [diff] [blame] | 2129 | return kvm_emulate_halt(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2130 | } |
| 2131 | |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2132 | static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2133 | { |
Dor Laor | 510043d | 2007-02-19 18:25:43 +0200 | [diff] [blame] | 2134 | skip_emulated_instruction(vcpu); |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 2135 | kvm_emulate_hypercall(vcpu); |
| 2136 | return 1; |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2137 | } |
| 2138 | |
Eddie Dong | e5edaa0 | 2007-11-11 12:28:35 +0200 | [diff] [blame] | 2139 | static int handle_wbinvd(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2140 | { |
| 2141 | skip_emulated_instruction(vcpu); |
| 2142 | /* TODO: Add support for VT-d/pass-through device */ |
| 2143 | return 1; |
| 2144 | } |
| 2145 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 2146 | static int handle_apic_access(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2147 | { |
| 2148 | u64 exit_qualification; |
| 2149 | enum emulation_result er; |
| 2150 | unsigned long offset; |
| 2151 | |
| 2152 | exit_qualification = vmcs_read64(EXIT_QUALIFICATION); |
| 2153 | offset = exit_qualification & 0xffful; |
| 2154 | |
| 2155 | er = emulate_instruction(vcpu, kvm_run, 0, 0, 0); |
| 2156 | |
| 2157 | if (er != EMULATE_DONE) { |
| 2158 | printk(KERN_ERR |
| 2159 | "Fail to handle apic access vmexit! Offset is 0x%lx\n", |
| 2160 | offset); |
| 2161 | return -ENOTSUPP; |
| 2162 | } |
| 2163 | return 1; |
| 2164 | } |
| 2165 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2166 | /* |
| 2167 | * The exit handlers return 1 if the exit was handled fully and guest execution |
| 2168 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs |
| 2169 | * to be done to userspace and return 0. |
| 2170 | */ |
| 2171 | static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu, |
| 2172 | struct kvm_run *kvm_run) = { |
| 2173 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, |
| 2174 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, |
Avi Kivity | 988ad74 | 2007-02-12 00:54:36 -0800 | [diff] [blame] | 2175 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2176 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2177 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
| 2178 | [EXIT_REASON_DR_ACCESS] = handle_dr, |
| 2179 | [EXIT_REASON_CPUID] = handle_cpuid, |
| 2180 | [EXIT_REASON_MSR_READ] = handle_rdmsr, |
| 2181 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, |
| 2182 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, |
| 2183 | [EXIT_REASON_HLT] = handle_halt, |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2184 | [EXIT_REASON_VMCALL] = handle_vmcall, |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 2185 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
| 2186 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, |
Eddie Dong | e5edaa0 | 2007-11-11 12:28:35 +0200 | [diff] [blame] | 2187 | [EXIT_REASON_WBINVD] = handle_wbinvd, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2188 | }; |
| 2189 | |
| 2190 | static const int kvm_vmx_max_exit_handlers = |
Robert P. J. Day | 50a3485 | 2007-06-03 13:35:29 -0400 | [diff] [blame] | 2191 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2192 | |
| 2193 | /* |
| 2194 | * The guest has exited. See if we can fix it or if we need userspace |
| 2195 | * assistance. |
| 2196 | */ |
| 2197 | static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
| 2198 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2199 | u32 exit_reason = vmcs_read32(VM_EXIT_REASON); |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 2200 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 2201 | u32 vectoring_info = vmx->idt_vectoring_info; |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 2202 | |
| 2203 | if (unlikely(vmx->fail)) { |
| 2204 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
| 2205 | kvm_run->fail_entry.hardware_entry_failure_reason |
| 2206 | = vmcs_read32(VM_INSTRUCTION_ERROR); |
| 2207 | return 0; |
| 2208 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2209 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2210 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
| 2211 | exit_reason != EXIT_REASON_EXCEPTION_NMI) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2212 | printk(KERN_WARNING "%s: unexpected, valid vectoring info and " |
| 2213 | "exit reason is 0x%x\n", __FUNCTION__, exit_reason); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2214 | if (exit_reason < kvm_vmx_max_exit_handlers |
| 2215 | && kvm_vmx_exit_handlers[exit_reason]) |
| 2216 | return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run); |
| 2217 | else { |
| 2218 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; |
| 2219 | kvm_run->hw.hardware_exit_reason = exit_reason; |
| 2220 | } |
| 2221 | return 0; |
| 2222 | } |
| 2223 | |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 2224 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
| 2225 | { |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 2226 | } |
| 2227 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2228 | static void update_tpr_threshold(struct kvm_vcpu *vcpu) |
| 2229 | { |
| 2230 | int max_irr, tpr; |
| 2231 | |
| 2232 | if (!vm_need_tpr_shadow(vcpu->kvm)) |
| 2233 | return; |
| 2234 | |
| 2235 | if (!kvm_lapic_enabled(vcpu) || |
| 2236 | ((max_irr = kvm_lapic_find_highest_irr(vcpu)) == -1)) { |
| 2237 | vmcs_write32(TPR_THRESHOLD, 0); |
| 2238 | return; |
| 2239 | } |
| 2240 | |
| 2241 | tpr = (kvm_lapic_get_cr8(vcpu) & 0x0f) << 4; |
| 2242 | vmcs_write32(TPR_THRESHOLD, (max_irr > tpr) ? tpr >> 4 : max_irr >> 4); |
| 2243 | } |
| 2244 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2245 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
| 2246 | { |
| 2247 | u32 cpu_based_vm_exec_control; |
| 2248 | |
| 2249 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 2250 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; |
| 2251 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
| 2252 | } |
| 2253 | |
| 2254 | static void vmx_intr_assist(struct kvm_vcpu *vcpu) |
| 2255 | { |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 2256 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2257 | u32 idtv_info_field, intr_info_field; |
| 2258 | int has_ext_irq, interrupt_window_open; |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2259 | int vector; |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2260 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2261 | update_tpr_threshold(vcpu); |
| 2262 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2263 | has_ext_irq = kvm_cpu_has_interrupt(vcpu); |
| 2264 | intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD); |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 2265 | idtv_info_field = vmx->idt_vectoring_info; |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2266 | if (intr_info_field & INTR_INFO_VALID_MASK) { |
| 2267 | if (idtv_info_field & INTR_INFO_VALID_MASK) { |
| 2268 | /* TODO: fault when IDT_Vectoring */ |
Ryan Harper | 9584bf2 | 2007-12-13 10:21:10 -0600 | [diff] [blame] | 2269 | if (printk_ratelimit()) |
| 2270 | printk(KERN_ERR "Fault when IDT_Vectoring\n"); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2271 | } |
| 2272 | if (has_ext_irq) |
| 2273 | enable_irq_window(vcpu); |
| 2274 | return; |
| 2275 | } |
| 2276 | if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) { |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 2277 | if ((idtv_info_field & VECTORING_INFO_TYPE_MASK) |
| 2278 | == INTR_TYPE_EXT_INTR |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2279 | && vcpu->arch.rmode.active) { |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 2280 | u8 vect = idtv_info_field & VECTORING_INFO_VECTOR_MASK; |
| 2281 | |
| 2282 | vmx_inject_irq(vcpu, vect); |
| 2283 | if (unlikely(has_ext_irq)) |
| 2284 | enable_irq_window(vcpu); |
| 2285 | return; |
| 2286 | } |
| 2287 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2288 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field); |
| 2289 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, |
| 2290 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN)); |
| 2291 | |
| 2292 | if (unlikely(idtv_info_field & INTR_INFO_DELIEVER_CODE_MASK)) |
| 2293 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, |
| 2294 | vmcs_read32(IDT_VECTORING_ERROR_CODE)); |
| 2295 | if (unlikely(has_ext_irq)) |
| 2296 | enable_irq_window(vcpu); |
| 2297 | return; |
| 2298 | } |
| 2299 | if (!has_ext_irq) |
| 2300 | return; |
| 2301 | interrupt_window_open = |
| 2302 | ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
| 2303 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2304 | if (interrupt_window_open) { |
| 2305 | vector = kvm_cpu_get_interrupt(vcpu); |
| 2306 | vmx_inject_irq(vcpu, vector); |
| 2307 | kvm_timer_intr_post(vcpu, vector); |
| 2308 | } else |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2309 | enable_irq_window(vcpu); |
| 2310 | } |
| 2311 | |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 2312 | /* |
| 2313 | * Failure to inject an interrupt should give us the information |
| 2314 | * in IDT_VECTORING_INFO_FIELD. However, if the failure occurs |
| 2315 | * when fetching the interrupt redirection bitmap in the real-mode |
| 2316 | * tss, this doesn't happen. So we do it ourselves. |
| 2317 | */ |
| 2318 | static void fixup_rmode_irq(struct vcpu_vmx *vmx) |
| 2319 | { |
| 2320 | vmx->rmode.irq.pending = 0; |
| 2321 | if (vmcs_readl(GUEST_RIP) + 1 != vmx->rmode.irq.rip) |
| 2322 | return; |
| 2323 | vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip); |
| 2324 | if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) { |
| 2325 | vmx->idt_vectoring_info &= ~VECTORING_INFO_TYPE_MASK; |
| 2326 | vmx->idt_vectoring_info |= INTR_TYPE_EXT_INTR; |
| 2327 | return; |
| 2328 | } |
| 2329 | vmx->idt_vectoring_info = |
| 2330 | VECTORING_INFO_VALID_MASK |
| 2331 | | INTR_TYPE_EXT_INTR |
| 2332 | | vmx->rmode.irq.vector; |
| 2333 | } |
| 2334 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2335 | 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] | 2336 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2337 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 2338 | u32 intr_info; |
Avi Kivity | e6adf28 | 2007-04-30 16:07:54 +0300 | [diff] [blame] | 2339 | |
| 2340 | /* |
| 2341 | * Loading guest fpu may have cleared host cr0.ts |
| 2342 | */ |
| 2343 | vmcs_writel(HOST_CR0, read_cr0()); |
| 2344 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2345 | asm( |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2346 | /* Store host registers */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2347 | #ifdef CONFIG_X86_64 |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 2348 | "push %%rdx; push %%rbp;" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2349 | "push %%rcx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2350 | #else |
Laurent Vivier | ff593e5 | 2007-10-25 14:18:55 +0200 | [diff] [blame] | 2351 | "push %%edx; push %%ebp;" |
| 2352 | "push %%ecx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2353 | #endif |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 2354 | ASM_VMX_VMWRITE_RSP_RDX "\n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2355 | /* Check if vmlaunch of vmresume is needed */ |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2356 | "cmpl $0, %c[launched](%0) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2357 | /* Load guest registers. Don't clobber flags. */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2358 | #ifdef CONFIG_X86_64 |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2359 | "mov %c[cr2](%0), %%rax \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2360 | "mov %%rax, %%cr2 \n\t" |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2361 | "mov %c[rax](%0), %%rax \n\t" |
| 2362 | "mov %c[rbx](%0), %%rbx \n\t" |
| 2363 | "mov %c[rdx](%0), %%rdx \n\t" |
| 2364 | "mov %c[rsi](%0), %%rsi \n\t" |
| 2365 | "mov %c[rdi](%0), %%rdi \n\t" |
| 2366 | "mov %c[rbp](%0), %%rbp \n\t" |
| 2367 | "mov %c[r8](%0), %%r8 \n\t" |
| 2368 | "mov %c[r9](%0), %%r9 \n\t" |
| 2369 | "mov %c[r10](%0), %%r10 \n\t" |
| 2370 | "mov %c[r11](%0), %%r11 \n\t" |
| 2371 | "mov %c[r12](%0), %%r12 \n\t" |
| 2372 | "mov %c[r13](%0), %%r13 \n\t" |
| 2373 | "mov %c[r14](%0), %%r14 \n\t" |
| 2374 | "mov %c[r15](%0), %%r15 \n\t" |
| 2375 | "mov %c[rcx](%0), %%rcx \n\t" /* kills %0 (rcx) */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2376 | #else |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2377 | "mov %c[cr2](%0), %%eax \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2378 | "mov %%eax, %%cr2 \n\t" |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2379 | "mov %c[rax](%0), %%eax \n\t" |
| 2380 | "mov %c[rbx](%0), %%ebx \n\t" |
| 2381 | "mov %c[rdx](%0), %%edx \n\t" |
| 2382 | "mov %c[rsi](%0), %%esi \n\t" |
| 2383 | "mov %c[rdi](%0), %%edi \n\t" |
| 2384 | "mov %c[rbp](%0), %%ebp \n\t" |
| 2385 | "mov %c[rcx](%0), %%ecx \n\t" /* kills %0 (ecx) */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2386 | #endif |
| 2387 | /* Enter guest mode */ |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 2388 | "jne .Llaunched \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2389 | ASM_VMX_VMLAUNCH "\n\t" |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 2390 | "jmp .Lkvm_vmx_return \n\t" |
| 2391 | ".Llaunched: " ASM_VMX_VMRESUME "\n\t" |
| 2392 | ".Lkvm_vmx_return: " |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2393 | /* Save guest registers, load host registers, keep flags */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2394 | #ifdef CONFIG_X86_64 |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2395 | "xchg %0, (%%rsp) \n\t" |
| 2396 | "mov %%rax, %c[rax](%0) \n\t" |
| 2397 | "mov %%rbx, %c[rbx](%0) \n\t" |
| 2398 | "pushq (%%rsp); popq %c[rcx](%0) \n\t" |
| 2399 | "mov %%rdx, %c[rdx](%0) \n\t" |
| 2400 | "mov %%rsi, %c[rsi](%0) \n\t" |
| 2401 | "mov %%rdi, %c[rdi](%0) \n\t" |
| 2402 | "mov %%rbp, %c[rbp](%0) \n\t" |
| 2403 | "mov %%r8, %c[r8](%0) \n\t" |
| 2404 | "mov %%r9, %c[r9](%0) \n\t" |
| 2405 | "mov %%r10, %c[r10](%0) \n\t" |
| 2406 | "mov %%r11, %c[r11](%0) \n\t" |
| 2407 | "mov %%r12, %c[r12](%0) \n\t" |
| 2408 | "mov %%r13, %c[r13](%0) \n\t" |
| 2409 | "mov %%r14, %c[r14](%0) \n\t" |
| 2410 | "mov %%r15, %c[r15](%0) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2411 | "mov %%cr2, %%rax \n\t" |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2412 | "mov %%rax, %c[cr2](%0) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2413 | |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2414 | "pop %%rbp; pop %%rbp; pop %%rdx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2415 | #else |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2416 | "xchg %0, (%%esp) \n\t" |
| 2417 | "mov %%eax, %c[rax](%0) \n\t" |
| 2418 | "mov %%ebx, %c[rbx](%0) \n\t" |
| 2419 | "pushl (%%esp); popl %c[rcx](%0) \n\t" |
| 2420 | "mov %%edx, %c[rdx](%0) \n\t" |
| 2421 | "mov %%esi, %c[rsi](%0) \n\t" |
| 2422 | "mov %%edi, %c[rdi](%0) \n\t" |
| 2423 | "mov %%ebp, %c[rbp](%0) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2424 | "mov %%cr2, %%eax \n\t" |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2425 | "mov %%eax, %c[cr2](%0) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2426 | |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2427 | "pop %%ebp; pop %%ebp; pop %%edx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2428 | #endif |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2429 | "setbe %c[fail](%0) \n\t" |
| 2430 | : : "c"(vmx), "d"((unsigned long)HOST_RSP), |
| 2431 | [launched]"i"(offsetof(struct vcpu_vmx, launched)), |
| 2432 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2433 | [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])), |
| 2434 | [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])), |
| 2435 | [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])), |
| 2436 | [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])), |
| 2437 | [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])), |
| 2438 | [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])), |
| 2439 | [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])), |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2440 | #ifdef CONFIG_X86_64 |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2441 | [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])), |
| 2442 | [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])), |
| 2443 | [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])), |
| 2444 | [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])), |
| 2445 | [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])), |
| 2446 | [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])), |
| 2447 | [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), |
| 2448 | [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2449 | #endif |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2450 | [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)) |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 2451 | : "cc", "memory" |
| 2452 | #ifdef CONFIG_X86_64 |
| 2453 | , "rbx", "rdi", "rsi" |
| 2454 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
Laurent Vivier | ff593e5 | 2007-10-25 14:18:55 +0200 | [diff] [blame] | 2455 | #else |
| 2456 | , "ebx", "edi", "rsi" |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 2457 | #endif |
| 2458 | ); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2459 | |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 2460 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 2461 | if (vmx->rmode.irq.pending) |
| 2462 | fixup_rmode_irq(vmx); |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 2463 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2464 | vcpu->arch.interrupt_window_open = |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2465 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2466 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2467 | asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2468 | vmx->launched = 1; |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 2469 | |
| 2470 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
| 2471 | |
| 2472 | /* We need to handle NMIs before interrupts are enabled */ |
| 2473 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ |
| 2474 | asm("int $2"); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2475 | } |
| 2476 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2477 | static void vmx_free_vmcs(struct kvm_vcpu *vcpu) |
| 2478 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2479 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 2480 | |
| 2481 | if (vmx->vmcs) { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 2482 | on_each_cpu(__vcpu_clear, vmx, 0, 1); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2483 | free_vmcs(vmx->vmcs); |
| 2484 | vmx->vmcs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2485 | } |
| 2486 | } |
| 2487 | |
| 2488 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) |
| 2489 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2490 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 2491 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2492 | vmx_free_vmcs(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2493 | kfree(vmx->host_msrs); |
| 2494 | kfree(vmx->guest_msrs); |
| 2495 | kvm_vcpu_uninit(vcpu); |
Rusty Russell | a477034 | 2007-08-01 14:46:11 +1000 | [diff] [blame] | 2496 | kmem_cache_free(kvm_vcpu_cache, vmx); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2497 | } |
| 2498 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2499 | 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] | 2500 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2501 | int err; |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2502 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2503 | int cpu; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2504 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2505 | if (!vmx) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2506 | return ERR_PTR(-ENOMEM); |
| 2507 | |
| 2508 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
| 2509 | if (err) |
| 2510 | goto free_vcpu; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2511 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2512 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2513 | if (!vmx->guest_msrs) { |
| 2514 | err = -ENOMEM; |
| 2515 | goto uninit_vcpu; |
| 2516 | } |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2517 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2518 | vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
| 2519 | if (!vmx->host_msrs) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2520 | goto free_guest_msrs; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2521 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2522 | vmx->vmcs = alloc_vmcs(); |
| 2523 | if (!vmx->vmcs) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2524 | goto free_msrs; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2525 | |
| 2526 | vmcs_clear(vmx->vmcs); |
| 2527 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2528 | cpu = get_cpu(); |
| 2529 | vmx_vcpu_load(&vmx->vcpu, cpu); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 2530 | err = vmx_vcpu_setup(vmx); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2531 | vmx_vcpu_put(&vmx->vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2532 | put_cpu(); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2533 | if (err) |
| 2534 | goto free_vmcs; |
Marcelo Tosatti | 5e4a0b3 | 2008-02-14 21:21:43 -0200 | [diff] [blame] | 2535 | if (vm_need_virtualize_apic_accesses(kvm)) |
| 2536 | if (alloc_apic_access_page(kvm) != 0) |
| 2537 | goto free_vmcs; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2538 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2539 | return &vmx->vcpu; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2540 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2541 | free_vmcs: |
| 2542 | free_vmcs(vmx->vmcs); |
| 2543 | free_msrs: |
| 2544 | kfree(vmx->host_msrs); |
| 2545 | free_guest_msrs: |
| 2546 | kfree(vmx->guest_msrs); |
| 2547 | uninit_vcpu: |
| 2548 | kvm_vcpu_uninit(&vmx->vcpu); |
| 2549 | free_vcpu: |
Rusty Russell | a477034 | 2007-08-01 14:46:11 +1000 | [diff] [blame] | 2550 | kmem_cache_free(kvm_vcpu_cache, vmx); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2551 | return ERR_PTR(err); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2552 | } |
| 2553 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2554 | static void __init vmx_check_processor_compat(void *rtn) |
| 2555 | { |
| 2556 | struct vmcs_config vmcs_conf; |
| 2557 | |
| 2558 | *(int *)rtn = 0; |
| 2559 | if (setup_vmcs_config(&vmcs_conf) < 0) |
| 2560 | *(int *)rtn = -EIO; |
| 2561 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { |
| 2562 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", |
| 2563 | smp_processor_id()); |
| 2564 | *(int *)rtn = -EIO; |
| 2565 | } |
| 2566 | } |
| 2567 | |
Christian Ehrhardt | cbdd1be | 2007-09-09 15:41:59 +0300 | [diff] [blame] | 2568 | static struct kvm_x86_ops vmx_x86_ops = { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2569 | .cpu_has_kvm_support = cpu_has_kvm_support, |
| 2570 | .disabled_by_bios = vmx_disabled_by_bios, |
| 2571 | .hardware_setup = hardware_setup, |
| 2572 | .hardware_unsetup = hardware_unsetup, |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2573 | .check_processor_compatibility = vmx_check_processor_compat, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2574 | .hardware_enable = hardware_enable, |
| 2575 | .hardware_disable = hardware_disable, |
Avi Kivity | 774ead3 | 2007-12-26 13:57:04 +0200 | [diff] [blame] | 2576 | .cpu_has_accelerated_tpr = cpu_has_vmx_virtualize_apic_accesses, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2577 | |
| 2578 | .vcpu_create = vmx_create_vcpu, |
| 2579 | .vcpu_free = vmx_free_vcpu, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2580 | .vcpu_reset = vmx_vcpu_reset, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2581 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2582 | .prepare_guest_switch = vmx_save_host_state, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2583 | .vcpu_load = vmx_vcpu_load, |
| 2584 | .vcpu_put = vmx_vcpu_put, |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2585 | .vcpu_decache = vmx_vcpu_decache, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2586 | |
| 2587 | .set_guest_debug = set_guest_debug, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2588 | .guest_debug_pre = kvm_guest_debug_pre, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2589 | .get_msr = vmx_get_msr, |
| 2590 | .set_msr = vmx_set_msr, |
| 2591 | .get_segment_base = vmx_get_segment_base, |
| 2592 | .get_segment = vmx_get_segment, |
| 2593 | .set_segment = vmx_set_segment, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2594 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 2595 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2596 | .set_cr0 = vmx_set_cr0, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2597 | .set_cr3 = vmx_set_cr3, |
| 2598 | .set_cr4 = vmx_set_cr4, |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2599 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2600 | .set_efer = vmx_set_efer, |
| 2601 | #endif |
| 2602 | .get_idt = vmx_get_idt, |
| 2603 | .set_idt = vmx_set_idt, |
| 2604 | .get_gdt = vmx_get_gdt, |
| 2605 | .set_gdt = vmx_set_gdt, |
| 2606 | .cache_regs = vcpu_load_rsp_rip, |
| 2607 | .decache_regs = vcpu_put_rsp_rip, |
| 2608 | .get_rflags = vmx_get_rflags, |
| 2609 | .set_rflags = vmx_set_rflags, |
| 2610 | |
| 2611 | .tlb_flush = vmx_flush_tlb, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2612 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2613 | .run = vmx_vcpu_run, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2614 | .handle_exit = kvm_handle_exit, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2615 | .skip_emulated_instruction = skip_emulated_instruction, |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2616 | .patch_hypercall = vmx_patch_hypercall, |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 2617 | .get_irq = vmx_get_irq, |
| 2618 | .set_irq = vmx_inject_irq, |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 2619 | .queue_exception = vmx_queue_exception, |
| 2620 | .exception_injected = vmx_exception_injected, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2621 | .inject_pending_irq = vmx_intr_assist, |
| 2622 | .inject_pending_vectors = do_interrupt_requests, |
Izik Eidus | cbc9402 | 2007-10-25 00:29:55 +0200 | [diff] [blame] | 2623 | |
| 2624 | .set_tss_addr = vmx_set_tss_addr, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2625 | }; |
| 2626 | |
| 2627 | static int __init vmx_init(void) |
| 2628 | { |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2629 | void *iova; |
| 2630 | int r; |
| 2631 | |
| 2632 | vmx_io_bitmap_a = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); |
| 2633 | if (!vmx_io_bitmap_a) |
| 2634 | return -ENOMEM; |
| 2635 | |
| 2636 | vmx_io_bitmap_b = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); |
| 2637 | if (!vmx_io_bitmap_b) { |
| 2638 | r = -ENOMEM; |
| 2639 | goto out; |
| 2640 | } |
| 2641 | |
| 2642 | /* |
| 2643 | * Allow direct access to the PC debug port (it is often used for I/O |
| 2644 | * delays, but the vmexits simply slow things down). |
| 2645 | */ |
| 2646 | iova = kmap(vmx_io_bitmap_a); |
| 2647 | memset(iova, 0xff, PAGE_SIZE); |
| 2648 | clear_bit(0x80, iova); |
Avi Kivity | cd0536d | 2007-05-08 11:34:07 +0300 | [diff] [blame] | 2649 | kunmap(vmx_io_bitmap_a); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2650 | |
| 2651 | iova = kmap(vmx_io_bitmap_b); |
| 2652 | memset(iova, 0xff, PAGE_SIZE); |
Avi Kivity | cd0536d | 2007-05-08 11:34:07 +0300 | [diff] [blame] | 2653 | kunmap(vmx_io_bitmap_b); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2654 | |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2655 | r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2656 | if (r) |
| 2657 | goto out1; |
| 2658 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 2659 | if (bypass_guest_pf) |
| 2660 | kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull); |
| 2661 | |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2662 | return 0; |
| 2663 | |
| 2664 | out1: |
| 2665 | __free_page(vmx_io_bitmap_b); |
| 2666 | out: |
| 2667 | __free_page(vmx_io_bitmap_a); |
| 2668 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2669 | } |
| 2670 | |
| 2671 | static void __exit vmx_exit(void) |
| 2672 | { |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2673 | __free_page(vmx_io_bitmap_b); |
| 2674 | __free_page(vmx_io_bitmap_a); |
| 2675 | |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2676 | kvm_exit(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2677 | } |
| 2678 | |
| 2679 | module_init(vmx_init) |
| 2680 | module_exit(vmx_exit) |