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Avi Kivity6aa8b732006-12-10 02:21:36 -08001/*
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 Dong85f455f2007-07-06 12:20:49 +030018#include "irq.h"
Avi Kivity6aa8b732006-12-10 02:21:36 -080019#include "vmx.h"
Zhang Xiantao1d737c82007-12-14 09:35:10 +080020#include "mmu.h"
Avi Kivitye4956062007-06-28 14:15:57 -040021
Avi Kivityedf88412007-12-16 11:02:48 +020022#include <linux/kvm_host.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080023#include <linux/module.h>
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +020024#include <linux/kernel.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080025#include <linux/mm.h>
26#include <linux/highmem.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040027#include <linux/sched.h>
Avi Kivityc7addb92007-09-16 18:58:32 +020028#include <linux/moduleparam.h>
Avi Kivitye4956062007-06-28 14:15:57 -040029
Avi Kivity6aa8b732006-12-10 02:21:36 -080030#include <asm/io.h>
Anthony Liguori3b3be0d2006-12-13 00:33:43 -080031#include <asm/desc.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080032
Avi Kivity4ecac3f2008-05-13 13:23:38 +030033#define __ex(x) __kvm_handle_fault_on_reboot(x)
34
Avi Kivity6aa8b732006-12-10 02:21:36 -080035MODULE_AUTHOR("Qumranet");
36MODULE_LICENSE("GPL");
37
Avi Kivityc7addb92007-09-16 18:58:32 +020038static int bypass_guest_pf = 1;
39module_param(bypass_guest_pf, bool, 0);
40
Sheng Yang2384d2b2008-01-17 15:14:33 +080041static int enable_vpid = 1;
42module_param(enable_vpid, bool, 0);
43
Avi Kivity4c9fc8e2008-03-24 18:15:14 +020044static int flexpriority_enabled = 1;
45module_param(flexpriority_enabled, bool, 0);
46
Sheng Yang14394422008-04-28 12:24:45 +080047static int enable_ept = 1;
Sheng Yangd56f5462008-04-25 10:13:16 +080048module_param(enable_ept, bool, 0);
49
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -040050struct vmcs {
51 u32 revision_id;
52 u32 abort;
53 char data[0];
54};
55
56struct vcpu_vmx {
Rusty Russellfb3f0f52007-07-27 17:16:56 +100057 struct kvm_vcpu vcpu;
Avi Kivity543e4242008-05-13 16:22:47 +030058 struct list_head local_vcpus_link;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -040059 int launched;
Avi Kivity29bd8a72007-09-10 17:27:03 +030060 u8 fail;
Avi Kivity1155f762007-11-22 11:30:47 +020061 u32 idt_vectoring_info;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -040062 struct kvm_msr_entry *guest_msrs;
63 struct kvm_msr_entry *host_msrs;
64 int nmsrs;
65 int save_nmsrs;
66 int msr_offset_efer;
67#ifdef CONFIG_X86_64
68 int msr_offset_kernel_gs_base;
69#endif
70 struct vmcs *vmcs;
71 struct {
72 int loaded;
73 u16 fs_sel, gs_sel, ldt_sel;
Laurent Vivier152d3f22007-08-23 16:33:11 +020074 int gs_ldt_reload_needed;
75 int fs_reload_needed;
Avi Kivity51c6cf62007-08-29 03:48:05 +030076 int guest_efer_loaded;
Mike Dayd77c26f2007-10-08 09:02:08 -040077 } host_state;
Avi Kivity9c8cba32007-11-22 11:42:59 +020078 struct {
79 struct {
80 bool pending;
81 u8 vector;
82 unsigned rip;
83 } irq;
84 } rmode;
Sheng Yang2384d2b2008-01-17 15:14:33 +080085 int vpid;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -040086};
87
88static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
89{
Rusty Russellfb3f0f52007-07-27 17:16:56 +100090 return container_of(vcpu, struct vcpu_vmx, vcpu);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -040091}
92
Sheng Yangb7ebfb02008-04-25 21:44:52 +080093static int init_rmode(struct kvm *kvm);
Sheng Yang4e1096d2008-07-06 19:16:51 +080094static u64 construct_eptp(unsigned long root_hpa);
Avi Kivity75880a02007-06-20 11:20:04 +030095
Avi Kivity6aa8b732006-12-10 02:21:36 -080096static DEFINE_PER_CPU(struct vmcs *, vmxarea);
97static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
Avi Kivity543e4242008-05-13 16:22:47 +030098static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -080099
He, Qingfdef3ad2007-04-30 09:45:24 +0300100static struct page *vmx_io_bitmap_a;
101static struct page *vmx_io_bitmap_b;
Sheng Yang25c5f222008-03-28 13:18:56 +0800102static struct page *vmx_msr_bitmap;
He, Qingfdef3ad2007-04-30 09:45:24 +0300103
Sheng Yang2384d2b2008-01-17 15:14:33 +0800104static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
105static DEFINE_SPINLOCK(vmx_vpid_lock);
106
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +0300107static struct vmcs_config {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800108 int size;
109 int order;
110 u32 revision_id;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +0300111 u32 pin_based_exec_ctrl;
112 u32 cpu_based_exec_ctrl;
Sheng Yangf78e0e22007-10-29 09:40:42 +0800113 u32 cpu_based_2nd_exec_ctrl;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +0300114 u32 vmexit_ctrl;
115 u32 vmentry_ctrl;
116} vmcs_config;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800117
Sheng Yangd56f5462008-04-25 10:13:16 +0800118struct vmx_capability {
119 u32 ept;
120 u32 vpid;
121} vmx_capability;
122
Avi Kivity6aa8b732006-12-10 02:21:36 -0800123#define VMX_SEGMENT_FIELD(seg) \
124 [VCPU_SREG_##seg] = { \
125 .selector = GUEST_##seg##_SELECTOR, \
126 .base = GUEST_##seg##_BASE, \
127 .limit = GUEST_##seg##_LIMIT, \
128 .ar_bytes = GUEST_##seg##_AR_BYTES, \
129 }
130
131static struct kvm_vmx_segment_field {
132 unsigned selector;
133 unsigned base;
134 unsigned limit;
135 unsigned ar_bytes;
136} kvm_vmx_segment_fields[] = {
137 VMX_SEGMENT_FIELD(CS),
138 VMX_SEGMENT_FIELD(DS),
139 VMX_SEGMENT_FIELD(ES),
140 VMX_SEGMENT_FIELD(FS),
141 VMX_SEGMENT_FIELD(GS),
142 VMX_SEGMENT_FIELD(SS),
143 VMX_SEGMENT_FIELD(TR),
144 VMX_SEGMENT_FIELD(LDTR),
145};
146
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300147/*
148 * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it
149 * away by decrementing the array size.
150 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800151static const u32 vmx_msr_index[] = {
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800152#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800153 MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE,
154#endif
155 MSR_EFER, MSR_K6_STAR,
156};
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +0200157#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800158
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400159static void load_msrs(struct kvm_msr_entry *e, int n)
160{
161 int i;
162
163 for (i = 0; i < n; ++i)
164 wrmsrl(e[i].index, e[i].data);
165}
166
167static void save_msrs(struct kvm_msr_entry *e, int n)
168{
169 int i;
170
171 for (i = 0; i < n; ++i)
172 rdmsrl(e[i].index, e[i].data);
173}
174
Avi Kivity6aa8b732006-12-10 02:21:36 -0800175static inline int is_page_fault(u32 intr_info)
176{
177 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
178 INTR_INFO_VALID_MASK)) ==
179 (INTR_TYPE_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
180}
181
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300182static inline int is_no_device(u32 intr_info)
183{
184 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
185 INTR_INFO_VALID_MASK)) ==
186 (INTR_TYPE_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
187}
188
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500189static inline int is_invalid_opcode(u32 intr_info)
190{
191 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
192 INTR_INFO_VALID_MASK)) ==
193 (INTR_TYPE_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK);
194}
195
Avi Kivity6aa8b732006-12-10 02:21:36 -0800196static inline int is_external_interrupt(u32 intr_info)
197{
198 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
199 == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
200}
201
Sheng Yang25c5f222008-03-28 13:18:56 +0800202static inline int cpu_has_vmx_msr_bitmap(void)
203{
204 return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS);
205}
206
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800207static inline int cpu_has_vmx_tpr_shadow(void)
208{
209 return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW);
210}
211
212static inline int vm_need_tpr_shadow(struct kvm *kvm)
213{
214 return ((cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm)));
215}
216
Sheng Yangf78e0e22007-10-29 09:40:42 +0800217static inline int cpu_has_secondary_exec_ctrls(void)
218{
219 return (vmcs_config.cpu_based_exec_ctrl &
220 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS);
221}
222
Avi Kivity774ead32007-12-26 13:57:04 +0200223static inline bool cpu_has_vmx_virtualize_apic_accesses(void)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800224{
Avi Kivity4c9fc8e2008-03-24 18:15:14 +0200225 return flexpriority_enabled
226 && (vmcs_config.cpu_based_2nd_exec_ctrl &
227 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES);
Sheng Yangf78e0e22007-10-29 09:40:42 +0800228}
229
Sheng Yangd56f5462008-04-25 10:13:16 +0800230static inline int cpu_has_vmx_invept_individual_addr(void)
231{
232 return (!!(vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT));
233}
234
235static inline int cpu_has_vmx_invept_context(void)
236{
237 return (!!(vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT));
238}
239
240static inline int cpu_has_vmx_invept_global(void)
241{
242 return (!!(vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT));
243}
244
245static inline int cpu_has_vmx_ept(void)
246{
247 return (vmcs_config.cpu_based_2nd_exec_ctrl &
248 SECONDARY_EXEC_ENABLE_EPT);
249}
250
251static inline int vm_need_ept(void)
252{
253 return (cpu_has_vmx_ept() && enable_ept);
254}
255
Sheng Yangf78e0e22007-10-29 09:40:42 +0800256static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm)
257{
258 return ((cpu_has_vmx_virtualize_apic_accesses()) &&
259 (irqchip_in_kernel(kvm)));
260}
261
Sheng Yang2384d2b2008-01-17 15:14:33 +0800262static inline int cpu_has_vmx_vpid(void)
263{
264 return (vmcs_config.cpu_based_2nd_exec_ctrl &
265 SECONDARY_EXEC_ENABLE_VPID);
266}
267
Sheng Yangf08864b2008-05-15 18:23:25 +0800268static inline int cpu_has_virtual_nmis(void)
269{
270 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS;
271}
272
Rusty Russell8b9cf982007-07-30 16:31:43 +1000273static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
Avi Kivity7725f0b2006-12-13 00:34:01 -0800274{
275 int i;
276
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400277 for (i = 0; i < vmx->nmsrs; ++i)
278 if (vmx->guest_msrs[i].index == msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300279 return i;
280 return -1;
281}
282
Sheng Yang2384d2b2008-01-17 15:14:33 +0800283static inline void __invvpid(int ext, u16 vpid, gva_t gva)
284{
285 struct {
286 u64 vpid : 16;
287 u64 rsvd : 48;
288 u64 gva;
289 } operand = { vpid, 0, gva };
290
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300291 asm volatile (__ex(ASM_VMX_INVVPID)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800292 /* CF==1 or ZF==1 --> rc = -1 */
293 "; ja 1f ; ud2 ; 1:"
294 : : "a"(&operand), "c"(ext) : "cc", "memory");
295}
296
Sheng Yang14394422008-04-28 12:24:45 +0800297static inline void __invept(int ext, u64 eptp, gpa_t gpa)
298{
299 struct {
300 u64 eptp, gpa;
301 } operand = {eptp, gpa};
302
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300303 asm volatile (__ex(ASM_VMX_INVEPT)
Sheng Yang14394422008-04-28 12:24:45 +0800304 /* CF==1 or ZF==1 --> rc = -1 */
305 "; ja 1f ; ud2 ; 1:\n"
306 : : "a" (&operand), "c" (ext) : "cc", "memory");
307}
308
Rusty Russell8b9cf982007-07-30 16:31:43 +1000309static struct kvm_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300310{
311 int i;
312
Rusty Russell8b9cf982007-07-30 16:31:43 +1000313 i = __find_msr_index(vmx, msr);
Eddie Donga75beee2007-05-17 18:55:15 +0300314 if (i >= 0)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400315 return &vmx->guest_msrs[i];
Al Viro8b6d44c2007-02-09 16:38:40 +0000316 return NULL;
Avi Kivity7725f0b2006-12-13 00:34:01 -0800317}
318
Avi Kivity6aa8b732006-12-10 02:21:36 -0800319static void vmcs_clear(struct vmcs *vmcs)
320{
321 u64 phys_addr = __pa(vmcs);
322 u8 error;
323
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300324 asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0"
Avi Kivity6aa8b732006-12-10 02:21:36 -0800325 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
326 : "cc", "memory");
327 if (error)
328 printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
329 vmcs, phys_addr);
330}
331
332static void __vcpu_clear(void *arg)
333{
Rusty Russell8b9cf982007-07-30 16:31:43 +1000334 struct vcpu_vmx *vmx = arg;
Ingo Molnard3b2c332007-01-05 16:36:23 -0800335 int cpu = raw_smp_processor_id();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800336
Rusty Russell8b9cf982007-07-30 16:31:43 +1000337 if (vmx->vcpu.cpu == cpu)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400338 vmcs_clear(vmx->vmcs);
339 if (per_cpu(current_vmcs, cpu) == vmx->vmcs)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800340 per_cpu(current_vmcs, cpu) = NULL;
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800341 rdtscll(vmx->vcpu.arch.host_tsc);
Avi Kivity543e4242008-05-13 16:22:47 +0300342 list_del(&vmx->local_vcpus_link);
343 vmx->vcpu.cpu = -1;
344 vmx->launched = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800345}
346
Rusty Russell8b9cf982007-07-30 16:31:43 +1000347static void vcpu_clear(struct vcpu_vmx *vmx)
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800348{
Avi Kivityeae5ecb2007-09-30 10:50:12 +0200349 if (vmx->vcpu.cpu == -1)
350 return;
Jens Axboe8691e5a2008-06-06 11:18:06 +0200351 smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1);
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800352}
353
Sheng Yang2384d2b2008-01-17 15:14:33 +0800354static inline void vpid_sync_vcpu_all(struct vcpu_vmx *vmx)
355{
356 if (vmx->vpid == 0)
357 return;
358
359 __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
360}
361
Sheng Yang14394422008-04-28 12:24:45 +0800362static inline void ept_sync_global(void)
363{
364 if (cpu_has_vmx_invept_global())
365 __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
366}
367
368static inline void ept_sync_context(u64 eptp)
369{
370 if (vm_need_ept()) {
371 if (cpu_has_vmx_invept_context())
372 __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
373 else
374 ept_sync_global();
375 }
376}
377
378static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
379{
380 if (vm_need_ept()) {
381 if (cpu_has_vmx_invept_individual_addr())
382 __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR,
383 eptp, gpa);
384 else
385 ept_sync_context(eptp);
386 }
387}
388
Avi Kivity6aa8b732006-12-10 02:21:36 -0800389static unsigned long vmcs_readl(unsigned long field)
390{
391 unsigned long value;
392
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300393 asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800394 : "=a"(value) : "d"(field) : "cc");
395 return value;
396}
397
398static u16 vmcs_read16(unsigned long field)
399{
400 return vmcs_readl(field);
401}
402
403static u32 vmcs_read32(unsigned long field)
404{
405 return vmcs_readl(field);
406}
407
408static u64 vmcs_read64(unsigned long field)
409{
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800410#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800411 return vmcs_readl(field);
412#else
413 return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
414#endif
415}
416
Avi Kivitye52de1b2007-01-05 16:36:56 -0800417static noinline void vmwrite_error(unsigned long field, unsigned long value)
418{
419 printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
420 field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
421 dump_stack();
422}
423
Avi Kivity6aa8b732006-12-10 02:21:36 -0800424static void vmcs_writel(unsigned long field, unsigned long value)
425{
426 u8 error;
427
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300428 asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0"
Mike Dayd77c26f2007-10-08 09:02:08 -0400429 : "=q"(error) : "a"(value), "d"(field) : "cc");
Avi Kivitye52de1b2007-01-05 16:36:56 -0800430 if (unlikely(error))
431 vmwrite_error(field, value);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800432}
433
434static void vmcs_write16(unsigned long field, u16 value)
435{
436 vmcs_writel(field, value);
437}
438
439static void vmcs_write32(unsigned long field, u32 value)
440{
441 vmcs_writel(field, value);
442}
443
444static void vmcs_write64(unsigned long field, u64 value)
445{
Avi Kivity6aa8b732006-12-10 02:21:36 -0800446 vmcs_writel(field, value);
Avi Kivity7682f2d2008-05-12 19:25:43 +0300447#ifndef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800448 asm volatile ("");
449 vmcs_writel(field+1, value >> 32);
450#endif
451}
452
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300453static void vmcs_clear_bits(unsigned long field, u32 mask)
454{
455 vmcs_writel(field, vmcs_readl(field) & ~mask);
456}
457
458static void vmcs_set_bits(unsigned long field, u32 mask)
459{
460 vmcs_writel(field, vmcs_readl(field) | mask);
461}
462
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300463static void update_exception_bitmap(struct kvm_vcpu *vcpu)
464{
465 u32 eb;
466
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500467 eb = (1u << PF_VECTOR) | (1u << UD_VECTOR);
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300468 if (!vcpu->fpu_active)
469 eb |= 1u << NM_VECTOR;
470 if (vcpu->guest_debug.enabled)
471 eb |= 1u << 1;
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800472 if (vcpu->arch.rmode.active)
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300473 eb = ~0;
Sheng Yang14394422008-04-28 12:24:45 +0800474 if (vm_need_ept())
475 eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300476 vmcs_write32(EXCEPTION_BITMAP, eb);
477}
478
Avi Kivity33ed6322007-05-02 16:54:03 +0300479static void reload_tss(void)
480{
Avi Kivity33ed6322007-05-02 16:54:03 +0300481 /*
482 * VT restores TR but not its size. Useless.
483 */
484 struct descriptor_table gdt;
Avi Kivitya5f61302008-02-20 17:57:21 +0200485 struct desc_struct *descs;
Avi Kivity33ed6322007-05-02 16:54:03 +0300486
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300487 kvm_get_gdt(&gdt);
Avi Kivity33ed6322007-05-02 16:54:03 +0300488 descs = (void *)gdt.base;
489 descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
490 load_TR_desc();
Avi Kivity33ed6322007-05-02 16:54:03 +0300491}
492
Rusty Russell8b9cf982007-07-30 16:31:43 +1000493static void load_transition_efer(struct vcpu_vmx *vmx)
Eddie Dong2cc51562007-05-21 07:28:09 +0300494{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400495 int efer_offset = vmx->msr_offset_efer;
Avi Kivity51c6cf62007-08-29 03:48:05 +0300496 u64 host_efer = vmx->host_msrs[efer_offset].data;
497 u64 guest_efer = vmx->guest_msrs[efer_offset].data;
498 u64 ignore_bits;
Eddie Dong2cc51562007-05-21 07:28:09 +0300499
Avi Kivity51c6cf62007-08-29 03:48:05 +0300500 if (efer_offset < 0)
501 return;
502 /*
503 * NX is emulated; LMA and LME handled by hardware; SCE meaninless
504 * outside long mode
505 */
506 ignore_bits = EFER_NX | EFER_SCE;
507#ifdef CONFIG_X86_64
508 ignore_bits |= EFER_LMA | EFER_LME;
509 /* SCE is meaningful only in long mode on Intel */
510 if (guest_efer & EFER_LMA)
511 ignore_bits &= ~(u64)EFER_SCE;
512#endif
513 if ((guest_efer & ~ignore_bits) == (host_efer & ~ignore_bits))
514 return;
515
516 vmx->host_state.guest_efer_loaded = 1;
517 guest_efer &= ~ignore_bits;
518 guest_efer |= host_efer & ignore_bits;
519 wrmsrl(MSR_EFER, guest_efer);
Rusty Russell8b9cf982007-07-30 16:31:43 +1000520 vmx->vcpu.stat.efer_reload++;
Eddie Dong2cc51562007-05-21 07:28:09 +0300521}
522
Avi Kivity51c6cf62007-08-29 03:48:05 +0300523static void reload_host_efer(struct vcpu_vmx *vmx)
524{
525 if (vmx->host_state.guest_efer_loaded) {
526 vmx->host_state.guest_efer_loaded = 0;
527 load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1);
528 }
529}
530
Avi Kivity04d2cc72007-09-10 18:10:54 +0300531static void vmx_save_host_state(struct kvm_vcpu *vcpu)
Avi Kivity33ed6322007-05-02 16:54:03 +0300532{
Avi Kivity04d2cc72007-09-10 18:10:54 +0300533 struct vcpu_vmx *vmx = to_vmx(vcpu);
534
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400535 if (vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300536 return;
537
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400538 vmx->host_state.loaded = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300539 /*
540 * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
541 * allow segment selectors with cpl > 0 or ti == 1.
542 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300543 vmx->host_state.ldt_sel = kvm_read_ldt();
Laurent Vivier152d3f22007-08-23 16:33:11 +0200544 vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300545 vmx->host_state.fs_sel = kvm_read_fs();
Laurent Vivier152d3f22007-08-23 16:33:11 +0200546 if (!(vmx->host_state.fs_sel & 7)) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400547 vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200548 vmx->host_state.fs_reload_needed = 0;
549 } else {
Avi Kivity33ed6322007-05-02 16:54:03 +0300550 vmcs_write16(HOST_FS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200551 vmx->host_state.fs_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300552 }
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300553 vmx->host_state.gs_sel = kvm_read_gs();
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400554 if (!(vmx->host_state.gs_sel & 7))
555 vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300556 else {
557 vmcs_write16(HOST_GS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200558 vmx->host_state.gs_ldt_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300559 }
560
561#ifdef CONFIG_X86_64
562 vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
563 vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
564#else
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400565 vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
566 vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
Avi Kivity33ed6322007-05-02 16:54:03 +0300567#endif
Avi Kivity707c0872007-05-02 17:33:43 +0300568
569#ifdef CONFIG_X86_64
Mike Dayd77c26f2007-10-08 09:02:08 -0400570 if (is_long_mode(&vmx->vcpu))
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400571 save_msrs(vmx->host_msrs +
572 vmx->msr_offset_kernel_gs_base, 1);
Mike Dayd77c26f2007-10-08 09:02:08 -0400573
Avi Kivity707c0872007-05-02 17:33:43 +0300574#endif
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400575 load_msrs(vmx->guest_msrs, vmx->save_nmsrs);
Avi Kivity51c6cf62007-08-29 03:48:05 +0300576 load_transition_efer(vmx);
Avi Kivity33ed6322007-05-02 16:54:03 +0300577}
578
Avi Kivitya9b21b62008-06-24 11:48:49 +0300579static void __vmx_load_host_state(struct vcpu_vmx *vmx)
Avi Kivity33ed6322007-05-02 16:54:03 +0300580{
Avi Kivity15ad7142007-07-11 18:17:21 +0300581 unsigned long flags;
Avi Kivity33ed6322007-05-02 16:54:03 +0300582
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400583 if (!vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300584 return;
585
Avi Kivitye1beb1d2007-11-18 13:50:24 +0200586 ++vmx->vcpu.stat.host_state_reload;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400587 vmx->host_state.loaded = 0;
Laurent Vivier152d3f22007-08-23 16:33:11 +0200588 if (vmx->host_state.fs_reload_needed)
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300589 kvm_load_fs(vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200590 if (vmx->host_state.gs_ldt_reload_needed) {
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300591 kvm_load_ldt(vmx->host_state.ldt_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300592 /*
593 * If we have to reload gs, we must take care to
594 * preserve our gs base.
595 */
Avi Kivity15ad7142007-07-11 18:17:21 +0300596 local_irq_save(flags);
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300597 kvm_load_gs(vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300598#ifdef CONFIG_X86_64
599 wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE));
600#endif
Avi Kivity15ad7142007-07-11 18:17:21 +0300601 local_irq_restore(flags);
Avi Kivity33ed6322007-05-02 16:54:03 +0300602 }
Laurent Vivier152d3f22007-08-23 16:33:11 +0200603 reload_tss();
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400604 save_msrs(vmx->guest_msrs, vmx->save_nmsrs);
605 load_msrs(vmx->host_msrs, vmx->save_nmsrs);
Avi Kivity51c6cf62007-08-29 03:48:05 +0300606 reload_host_efer(vmx);
Avi Kivity33ed6322007-05-02 16:54:03 +0300607}
608
Avi Kivitya9b21b62008-06-24 11:48:49 +0300609static void vmx_load_host_state(struct vcpu_vmx *vmx)
610{
611 preempt_disable();
612 __vmx_load_host_state(vmx);
613 preempt_enable();
614}
615
Avi Kivity6aa8b732006-12-10 02:21:36 -0800616/*
617 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
618 * vcpu mutex is already taken.
619 */
Avi Kivity15ad7142007-07-11 18:17:21 +0300620static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800621{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400622 struct vcpu_vmx *vmx = to_vmx(vcpu);
623 u64 phys_addr = __pa(vmx->vmcs);
Avi Kivity019960a2008-03-04 10:44:51 +0200624 u64 tsc_this, delta, new_offset;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800625
Eddie Donga3d7f852007-09-03 16:15:12 +0300626 if (vcpu->cpu != cpu) {
Rusty Russell8b9cf982007-07-30 16:31:43 +1000627 vcpu_clear(vmx);
Marcelo Tosatti2f599712008-05-27 12:10:20 -0300628 kvm_migrate_timers(vcpu);
Sheng Yang2384d2b2008-01-17 15:14:33 +0800629 vpid_sync_vcpu_all(vmx);
Avi Kivity543e4242008-05-13 16:22:47 +0300630 local_irq_disable();
631 list_add(&vmx->local_vcpus_link,
632 &per_cpu(vcpus_on_cpu, cpu));
633 local_irq_enable();
Eddie Donga3d7f852007-09-03 16:15:12 +0300634 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800635
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400636 if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800637 u8 error;
638
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400639 per_cpu(current_vmcs, cpu) = vmx->vmcs;
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300640 asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
Avi Kivity6aa8b732006-12-10 02:21:36 -0800641 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
642 : "cc");
643 if (error)
644 printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400645 vmx->vmcs, phys_addr);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800646 }
647
648 if (vcpu->cpu != cpu) {
649 struct descriptor_table dt;
650 unsigned long sysenter_esp;
651
652 vcpu->cpu = cpu;
653 /*
654 * Linux uses per-cpu TSS and GDT, so set these when switching
655 * processors.
656 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300657 vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */
658 kvm_get_gdt(&dt);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800659 vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */
660
661 rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
662 vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
Avi Kivity77002702007-06-13 19:55:28 +0300663
664 /*
665 * Make sure the time stamp counter is monotonous.
666 */
667 rdtscll(tsc_this);
Avi Kivity019960a2008-03-04 10:44:51 +0200668 if (tsc_this < vcpu->arch.host_tsc) {
669 delta = vcpu->arch.host_tsc - tsc_this;
670 new_offset = vmcs_read64(TSC_OFFSET) + delta;
671 vmcs_write64(TSC_OFFSET, new_offset);
672 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800673 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800674}
675
676static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
677{
Avi Kivitya9b21b62008-06-24 11:48:49 +0300678 __vmx_load_host_state(to_vmx(vcpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800679}
680
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300681static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
682{
683 if (vcpu->fpu_active)
684 return;
685 vcpu->fpu_active = 1;
Rusty Russell707d92fa2007-07-17 23:19:08 +1000686 vmcs_clear_bits(GUEST_CR0, X86_CR0_TS);
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800687 if (vcpu->arch.cr0 & X86_CR0_TS)
Rusty Russell707d92fa2007-07-17 23:19:08 +1000688 vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300689 update_exception_bitmap(vcpu);
690}
691
692static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
693{
694 if (!vcpu->fpu_active)
695 return;
696 vcpu->fpu_active = 0;
Rusty Russell707d92fa2007-07-17 23:19:08 +1000697 vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300698 update_exception_bitmap(vcpu);
699}
700
Avi Kivity6aa8b732006-12-10 02:21:36 -0800701static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
702{
703 return vmcs_readl(GUEST_RFLAGS);
704}
705
706static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
707{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800708 if (vcpu->arch.rmode.active)
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +0100709 rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800710 vmcs_writel(GUEST_RFLAGS, rflags);
711}
712
713static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
714{
715 unsigned long rip;
716 u32 interruptibility;
717
718 rip = vmcs_readl(GUEST_RIP);
719 rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
720 vmcs_writel(GUEST_RIP, rip);
721
722 /*
723 * We emulated an instruction, so temporary interrupt blocking
724 * should be removed, if set.
725 */
726 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
727 if (interruptibility & 3)
728 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
729 interruptibility & ~3);
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800730 vcpu->arch.interrupt_window_open = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800731}
732
Avi Kivity298101d2007-11-25 13:41:11 +0200733static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
734 bool has_error_code, u32 error_code)
735{
736 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
737 nr | INTR_TYPE_EXCEPTION
Ryan Harper2e113842008-02-11 10:26:38 -0600738 | (has_error_code ? INTR_INFO_DELIVER_CODE_MASK : 0)
Avi Kivity298101d2007-11-25 13:41:11 +0200739 | INTR_INFO_VALID_MASK);
740 if (has_error_code)
741 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
742}
743
744static bool vmx_exception_injected(struct kvm_vcpu *vcpu)
745{
746 struct vcpu_vmx *vmx = to_vmx(vcpu);
747
748 return !(vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK);
749}
750
Avi Kivity6aa8b732006-12-10 02:21:36 -0800751/*
Eddie Donga75beee2007-05-17 18:55:15 +0300752 * Swap MSR entry in host/guest MSR entry array.
753 */
Gabriel C54e11fa2007-08-01 16:23:10 +0200754#ifdef CONFIG_X86_64
Rusty Russell8b9cf982007-07-30 16:31:43 +1000755static void move_msr_up(struct vcpu_vmx *vmx, int from, int to)
Eddie Donga75beee2007-05-17 18:55:15 +0300756{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400757 struct kvm_msr_entry tmp;
758
759 tmp = vmx->guest_msrs[to];
760 vmx->guest_msrs[to] = vmx->guest_msrs[from];
761 vmx->guest_msrs[from] = tmp;
762 tmp = vmx->host_msrs[to];
763 vmx->host_msrs[to] = vmx->host_msrs[from];
764 vmx->host_msrs[from] = tmp;
Eddie Donga75beee2007-05-17 18:55:15 +0300765}
Gabriel C54e11fa2007-08-01 16:23:10 +0200766#endif
Eddie Donga75beee2007-05-17 18:55:15 +0300767
768/*
Avi Kivitye38aea32007-04-19 13:22:48 +0300769 * Set up the vmcs to automatically save and restore system
770 * msrs. Don't touch the 64-bit msrs if the guest is in legacy
771 * mode, as fiddling with msrs is very expensive.
772 */
Rusty Russell8b9cf982007-07-30 16:31:43 +1000773static void setup_msrs(struct vcpu_vmx *vmx)
Avi Kivitye38aea32007-04-19 13:22:48 +0300774{
Eddie Dong2cc51562007-05-21 07:28:09 +0300775 int save_nmsrs;
Avi Kivitye38aea32007-04-19 13:22:48 +0300776
Avi Kivity33f9c502008-02-27 16:06:57 +0200777 vmx_load_host_state(vmx);
Eddie Donga75beee2007-05-17 18:55:15 +0300778 save_nmsrs = 0;
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300779#ifdef CONFIG_X86_64
Rusty Russell8b9cf982007-07-30 16:31:43 +1000780 if (is_long_mode(&vmx->vcpu)) {
Eddie Dong2cc51562007-05-21 07:28:09 +0300781 int index;
782
Rusty Russell8b9cf982007-07-30 16:31:43 +1000783 index = __find_msr_index(vmx, MSR_SYSCALL_MASK);
Eddie Donga75beee2007-05-17 18:55:15 +0300784 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +1000785 move_msr_up(vmx, index, save_nmsrs++);
786 index = __find_msr_index(vmx, MSR_LSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +0300787 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +1000788 move_msr_up(vmx, index, save_nmsrs++);
789 index = __find_msr_index(vmx, MSR_CSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +0300790 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +1000791 move_msr_up(vmx, index, save_nmsrs++);
792 index = __find_msr_index(vmx, MSR_KERNEL_GS_BASE);
Eddie Donga75beee2007-05-17 18:55:15 +0300793 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +1000794 move_msr_up(vmx, index, save_nmsrs++);
Eddie Donga75beee2007-05-17 18:55:15 +0300795 /*
796 * MSR_K6_STAR is only needed on long mode guests, and only
797 * if efer.sce is enabled.
798 */
Rusty Russell8b9cf982007-07-30 16:31:43 +1000799 index = __find_msr_index(vmx, MSR_K6_STAR);
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800800 if ((index >= 0) && (vmx->vcpu.arch.shadow_efer & EFER_SCE))
Rusty Russell8b9cf982007-07-30 16:31:43 +1000801 move_msr_up(vmx, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300802 }
Eddie Donga75beee2007-05-17 18:55:15 +0300803#endif
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400804 vmx->save_nmsrs = save_nmsrs;
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300805
Eddie Donga75beee2007-05-17 18:55:15 +0300806#ifdef CONFIG_X86_64
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400807 vmx->msr_offset_kernel_gs_base =
Rusty Russell8b9cf982007-07-30 16:31:43 +1000808 __find_msr_index(vmx, MSR_KERNEL_GS_BASE);
Eddie Donga75beee2007-05-17 18:55:15 +0300809#endif
Rusty Russell8b9cf982007-07-30 16:31:43 +1000810 vmx->msr_offset_efer = __find_msr_index(vmx, MSR_EFER);
Avi Kivitye38aea32007-04-19 13:22:48 +0300811}
812
813/*
Avi Kivity6aa8b732006-12-10 02:21:36 -0800814 * reads and returns guest's timestamp counter "register"
815 * guest_tsc = host_tsc + tsc_offset -- 21.3
816 */
817static u64 guest_read_tsc(void)
818{
819 u64 host_tsc, tsc_offset;
820
821 rdtscll(host_tsc);
822 tsc_offset = vmcs_read64(TSC_OFFSET);
823 return host_tsc + tsc_offset;
824}
825
826/*
827 * writes 'guest_tsc' into guest's timestamp counter "register"
828 * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc
829 */
830static void guest_write_tsc(u64 guest_tsc)
831{
832 u64 host_tsc;
833
834 rdtscll(host_tsc);
835 vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc);
836}
837
Avi Kivity6aa8b732006-12-10 02:21:36 -0800838/*
839 * Reads an msr value (of 'msr_index') into 'pdata'.
840 * Returns 0 on success, non-0 otherwise.
841 * Assumes vcpu_load() was already called.
842 */
843static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
844{
845 u64 data;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400846 struct kvm_msr_entry *msr;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800847
848 if (!pdata) {
849 printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
850 return -EINVAL;
851 }
852
853 switch (msr_index) {
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800854#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800855 case MSR_FS_BASE:
856 data = vmcs_readl(GUEST_FS_BASE);
857 break;
858 case MSR_GS_BASE:
859 data = vmcs_readl(GUEST_GS_BASE);
860 break;
861 case MSR_EFER:
Avi Kivity3bab1f52006-12-29 16:49:48 -0800862 return kvm_get_msr_common(vcpu, msr_index, pdata);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800863#endif
864 case MSR_IA32_TIME_STAMP_COUNTER:
865 data = guest_read_tsc();
866 break;
867 case MSR_IA32_SYSENTER_CS:
868 data = vmcs_read32(GUEST_SYSENTER_CS);
869 break;
870 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +0200871 data = vmcs_readl(GUEST_SYSENTER_EIP);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800872 break;
873 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +0200874 data = vmcs_readl(GUEST_SYSENTER_ESP);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800875 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800876 default:
Rusty Russell8b9cf982007-07-30 16:31:43 +1000877 msr = find_msr_entry(to_vmx(vcpu), msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -0800878 if (msr) {
879 data = msr->data;
880 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800881 }
Avi Kivity3bab1f52006-12-29 16:49:48 -0800882 return kvm_get_msr_common(vcpu, msr_index, pdata);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800883 }
884
885 *pdata = data;
886 return 0;
887}
888
889/*
890 * Writes msr value into into the appropriate "register".
891 * Returns 0 on success, non-0 otherwise.
892 * Assumes vcpu_load() was already called.
893 */
894static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
895{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400896 struct vcpu_vmx *vmx = to_vmx(vcpu);
897 struct kvm_msr_entry *msr;
Eddie Dong2cc51562007-05-21 07:28:09 +0300898 int ret = 0;
899
Avi Kivity6aa8b732006-12-10 02:21:36 -0800900 switch (msr_index) {
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800901#ifdef CONFIG_X86_64
Avi Kivity3bab1f52006-12-29 16:49:48 -0800902 case MSR_EFER:
Avi Kivitya9b21b62008-06-24 11:48:49 +0300903 vmx_load_host_state(vmx);
Eddie Dong2cc51562007-05-21 07:28:09 +0300904 ret = kvm_set_msr_common(vcpu, msr_index, data);
Eddie Dong2cc51562007-05-21 07:28:09 +0300905 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800906 case MSR_FS_BASE:
907 vmcs_writel(GUEST_FS_BASE, data);
908 break;
909 case MSR_GS_BASE:
910 vmcs_writel(GUEST_GS_BASE, data);
911 break;
912#endif
913 case MSR_IA32_SYSENTER_CS:
914 vmcs_write32(GUEST_SYSENTER_CS, data);
915 break;
916 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +0200917 vmcs_writel(GUEST_SYSENTER_EIP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800918 break;
919 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +0200920 vmcs_writel(GUEST_SYSENTER_ESP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800921 break;
Avi Kivityd27d4ac2007-02-19 14:37:46 +0200922 case MSR_IA32_TIME_STAMP_COUNTER:
Avi Kivity6aa8b732006-12-10 02:21:36 -0800923 guest_write_tsc(data);
924 break;
Chris Lalancetteefa67e02008-06-20 09:51:30 +0200925 case MSR_P6_PERFCTR0:
926 case MSR_P6_PERFCTR1:
927 case MSR_P6_EVNTSEL0:
928 case MSR_P6_EVNTSEL1:
929 /*
930 * Just discard all writes to the performance counters; this
931 * should keep both older linux and windows 64-bit guests
932 * happy
933 */
934 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: 0x%x data 0x%llx\n", msr_index, data);
935
936 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800937 default:
Avi Kivitya9b21b62008-06-24 11:48:49 +0300938 vmx_load_host_state(vmx);
Rusty Russell8b9cf982007-07-30 16:31:43 +1000939 msr = find_msr_entry(vmx, msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -0800940 if (msr) {
941 msr->data = data;
942 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800943 }
Eddie Dong2cc51562007-05-21 07:28:09 +0300944 ret = kvm_set_msr_common(vcpu, msr_index, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800945 }
946
Eddie Dong2cc51562007-05-21 07:28:09 +0300947 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800948}
949
950/*
951 * Sync the rsp and rip registers into the vcpu structure. This allows
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800952 * registers to be accessed by indexing vcpu->arch.regs.
Avi Kivity6aa8b732006-12-10 02:21:36 -0800953 */
954static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu)
955{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800956 vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
957 vcpu->arch.rip = vmcs_readl(GUEST_RIP);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800958}
959
960/*
961 * Syncs rsp and rip back into the vmcs. Should be called after possible
962 * modification.
963 */
964static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu)
965{
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800966 vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);
967 vmcs_writel(GUEST_RIP, vcpu->arch.rip);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800968}
969
970static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
971{
972 unsigned long dr7 = 0x400;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800973 int old_singlestep;
974
Avi Kivity6aa8b732006-12-10 02:21:36 -0800975 old_singlestep = vcpu->guest_debug.singlestep;
976
977 vcpu->guest_debug.enabled = dbg->enabled;
978 if (vcpu->guest_debug.enabled) {
979 int i;
980
981 dr7 |= 0x200; /* exact */
982 for (i = 0; i < 4; ++i) {
983 if (!dbg->breakpoints[i].enabled)
984 continue;
985 vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
986 dr7 |= 2 << (i*2); /* global enable */
987 dr7 |= 0 << (i*4+16); /* execution breakpoint */
988 }
989
Avi Kivity6aa8b732006-12-10 02:21:36 -0800990 vcpu->guest_debug.singlestep = dbg->singlestep;
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300991 } else
Avi Kivity6aa8b732006-12-10 02:21:36 -0800992 vcpu->guest_debug.singlestep = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800993
994 if (old_singlestep && !vcpu->guest_debug.singlestep) {
995 unsigned long flags;
996
997 flags = vmcs_readl(GUEST_RFLAGS);
998 flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
999 vmcs_writel(GUEST_RFLAGS, flags);
1000 }
1001
Avi Kivityabd3f2d2007-05-02 17:57:40 +03001002 update_exception_bitmap(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001003 vmcs_writel(GUEST_DR7, dr7);
1004
1005 return 0;
1006}
1007
Eddie Dong2a8067f2007-08-06 16:29:07 +03001008static int vmx_get_irq(struct kvm_vcpu *vcpu)
1009{
Avi Kivity1155f762007-11-22 11:30:47 +02001010 struct vcpu_vmx *vmx = to_vmx(vcpu);
Eddie Dong2a8067f2007-08-06 16:29:07 +03001011 u32 idtv_info_field;
1012
Avi Kivity1155f762007-11-22 11:30:47 +02001013 idtv_info_field = vmx->idt_vectoring_info;
Eddie Dong2a8067f2007-08-06 16:29:07 +03001014 if (idtv_info_field & INTR_INFO_VALID_MASK) {
1015 if (is_external_interrupt(idtv_info_field))
1016 return idtv_info_field & VECTORING_INFO_VECTOR_MASK;
1017 else
Mike Dayd77c26f2007-10-08 09:02:08 -04001018 printk(KERN_DEBUG "pending exception: not handled yet\n");
Eddie Dong2a8067f2007-08-06 16:29:07 +03001019 }
1020 return -1;
1021}
1022
Avi Kivity6aa8b732006-12-10 02:21:36 -08001023static __init int cpu_has_kvm_support(void)
1024{
1025 unsigned long ecx = cpuid_ecx(1);
1026 return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */
1027}
1028
1029static __init int vmx_disabled_by_bios(void)
1030{
1031 u64 msr;
1032
1033 rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
Yang, Sheng62b3ffb2007-07-25 12:17:06 +03001034 return (msr & (MSR_IA32_FEATURE_CONTROL_LOCKED |
1035 MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
1036 == MSR_IA32_FEATURE_CONTROL_LOCKED;
1037 /* locked but not enabled */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001038}
1039
Avi Kivity774c47f2007-02-12 00:54:47 -08001040static void hardware_enable(void *garbage)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001041{
1042 int cpu = raw_smp_processor_id();
1043 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
1044 u64 old;
1045
Avi Kivity543e4242008-05-13 16:22:47 +03001046 INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001047 rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
Yang, Sheng62b3ffb2007-07-25 12:17:06 +03001048 if ((old & (MSR_IA32_FEATURE_CONTROL_LOCKED |
1049 MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
1050 != (MSR_IA32_FEATURE_CONTROL_LOCKED |
1051 MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001052 /* enable and lock */
Yang, Sheng62b3ffb2007-07-25 12:17:06 +03001053 wrmsrl(MSR_IA32_FEATURE_CONTROL, old |
1054 MSR_IA32_FEATURE_CONTROL_LOCKED |
1055 MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED);
Rusty Russell66aee912007-07-17 23:34:16 +10001056 write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
Avi Kivity4ecac3f2008-05-13 13:23:38 +03001057 asm volatile (ASM_VMX_VMXON_RAX
1058 : : "a"(&phys_addr), "m"(phys_addr)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001059 : "memory", "cc");
1060}
1061
Avi Kivity543e4242008-05-13 16:22:47 +03001062static void vmclear_local_vcpus(void)
1063{
1064 int cpu = raw_smp_processor_id();
1065 struct vcpu_vmx *vmx, *n;
1066
1067 list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu),
1068 local_vcpus_link)
1069 __vcpu_clear(vmx);
1070}
1071
Avi Kivity6aa8b732006-12-10 02:21:36 -08001072static void hardware_disable(void *garbage)
1073{
Avi Kivity543e4242008-05-13 16:22:47 +03001074 vmclear_local_vcpus();
Avi Kivity4ecac3f2008-05-13 13:23:38 +03001075 asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc");
Eli Collinse693d712008-06-01 20:24:40 -07001076 write_cr4(read_cr4() & ~X86_CR4_VMXE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001077}
1078
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001079static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
Mike Dayd77c26f2007-10-08 09:02:08 -04001080 u32 msr, u32 *result)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001081{
1082 u32 vmx_msr_low, vmx_msr_high;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001083 u32 ctl = ctl_min | ctl_opt;
1084
1085 rdmsr(msr, vmx_msr_low, vmx_msr_high);
1086
1087 ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */
1088 ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */
1089
1090 /* Ensure minimum (required) set of control bits are supported. */
1091 if (ctl_min & ~ctl)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001092 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001093
1094 *result = ctl;
1095 return 0;
1096}
1097
Yang, Sheng002c7f72007-07-31 14:23:01 +03001098static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001099{
1100 u32 vmx_msr_low, vmx_msr_high;
Sheng Yangd56f5462008-04-25 10:13:16 +08001101 u32 min, opt, min2, opt2;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001102 u32 _pin_based_exec_control = 0;
1103 u32 _cpu_based_exec_control = 0;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001104 u32 _cpu_based_2nd_exec_control = 0;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001105 u32 _vmexit_control = 0;
1106 u32 _vmentry_control = 0;
1107
1108 min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING;
Sheng Yangf08864b2008-05-15 18:23:25 +08001109 opt = PIN_BASED_VIRTUAL_NMIS;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001110 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS,
1111 &_pin_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001112 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001113
1114 min = CPU_BASED_HLT_EXITING |
1115#ifdef CONFIG_X86_64
1116 CPU_BASED_CR8_LOAD_EXITING |
1117 CPU_BASED_CR8_STORE_EXITING |
1118#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08001119 CPU_BASED_CR3_LOAD_EXITING |
1120 CPU_BASED_CR3_STORE_EXITING |
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001121 CPU_BASED_USE_IO_BITMAPS |
1122 CPU_BASED_MOV_DR_EXITING |
1123 CPU_BASED_USE_TSC_OFFSETING;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001124 opt = CPU_BASED_TPR_SHADOW |
Sheng Yang25c5f222008-03-28 13:18:56 +08001125 CPU_BASED_USE_MSR_BITMAPS |
Sheng Yangf78e0e22007-10-29 09:40:42 +08001126 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001127 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
1128 &_cpu_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001129 return -EIO;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08001130#ifdef CONFIG_X86_64
1131 if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
1132 _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
1133 ~CPU_BASED_CR8_STORE_EXITING;
1134#endif
Sheng Yangf78e0e22007-10-29 09:40:42 +08001135 if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
Sheng Yangd56f5462008-04-25 10:13:16 +08001136 min2 = 0;
1137 opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
Sheng Yang2384d2b2008-01-17 15:14:33 +08001138 SECONDARY_EXEC_WBINVD_EXITING |
Sheng Yangd56f5462008-04-25 10:13:16 +08001139 SECONDARY_EXEC_ENABLE_VPID |
1140 SECONDARY_EXEC_ENABLE_EPT;
1141 if (adjust_vmx_controls(min2, opt2,
1142 MSR_IA32_VMX_PROCBASED_CTLS2,
Sheng Yangf78e0e22007-10-29 09:40:42 +08001143 &_cpu_based_2nd_exec_control) < 0)
1144 return -EIO;
1145 }
1146#ifndef CONFIG_X86_64
1147 if (!(_cpu_based_2nd_exec_control &
1148 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
1149 _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW;
1150#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08001151 if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) {
1152 /* CR3 accesses don't need to cause VM Exits when EPT enabled */
1153 min &= ~(CPU_BASED_CR3_LOAD_EXITING |
1154 CPU_BASED_CR3_STORE_EXITING);
1155 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
1156 &_cpu_based_exec_control) < 0)
1157 return -EIO;
1158 rdmsr(MSR_IA32_VMX_EPT_VPID_CAP,
1159 vmx_capability.ept, vmx_capability.vpid);
1160 }
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001161
1162 min = 0;
1163#ifdef CONFIG_X86_64
1164 min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
1165#endif
1166 opt = 0;
1167 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
1168 &_vmexit_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001169 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001170
1171 min = opt = 0;
1172 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
1173 &_vmentry_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001174 return -EIO;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001175
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001176 rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001177
1178 /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
1179 if ((vmx_msr_high & 0x1fff) > PAGE_SIZE)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001180 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001181
1182#ifdef CONFIG_X86_64
1183 /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */
1184 if (vmx_msr_high & (1u<<16))
Yang, Sheng002c7f72007-07-31 14:23:01 +03001185 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001186#endif
1187
1188 /* Require Write-Back (WB) memory type for VMCS accesses. */
1189 if (((vmx_msr_high >> 18) & 15) != 6)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001190 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001191
Yang, Sheng002c7f72007-07-31 14:23:01 +03001192 vmcs_conf->size = vmx_msr_high & 0x1fff;
1193 vmcs_conf->order = get_order(vmcs_config.size);
1194 vmcs_conf->revision_id = vmx_msr_low;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001195
Yang, Sheng002c7f72007-07-31 14:23:01 +03001196 vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
1197 vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001198 vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control;
Yang, Sheng002c7f72007-07-31 14:23:01 +03001199 vmcs_conf->vmexit_ctrl = _vmexit_control;
1200 vmcs_conf->vmentry_ctrl = _vmentry_control;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001201
1202 return 0;
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001203}
Avi Kivity6aa8b732006-12-10 02:21:36 -08001204
1205static struct vmcs *alloc_vmcs_cpu(int cpu)
1206{
1207 int node = cpu_to_node(cpu);
1208 struct page *pages;
1209 struct vmcs *vmcs;
1210
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001211 pages = alloc_pages_node(node, GFP_KERNEL, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001212 if (!pages)
1213 return NULL;
1214 vmcs = page_address(pages);
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001215 memset(vmcs, 0, vmcs_config.size);
1216 vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001217 return vmcs;
1218}
1219
1220static struct vmcs *alloc_vmcs(void)
1221{
Ingo Molnard3b2c332007-01-05 16:36:23 -08001222 return alloc_vmcs_cpu(raw_smp_processor_id());
Avi Kivity6aa8b732006-12-10 02:21:36 -08001223}
1224
1225static void free_vmcs(struct vmcs *vmcs)
1226{
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001227 free_pages((unsigned long)vmcs, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001228}
1229
Sam Ravnborg39959582007-06-01 00:47:13 -07001230static void free_kvm_area(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001231{
1232 int cpu;
1233
1234 for_each_online_cpu(cpu)
1235 free_vmcs(per_cpu(vmxarea, cpu));
1236}
1237
Avi Kivity6aa8b732006-12-10 02:21:36 -08001238static __init int alloc_kvm_area(void)
1239{
1240 int cpu;
1241
1242 for_each_online_cpu(cpu) {
1243 struct vmcs *vmcs;
1244
1245 vmcs = alloc_vmcs_cpu(cpu);
1246 if (!vmcs) {
1247 free_kvm_area();
1248 return -ENOMEM;
1249 }
1250
1251 per_cpu(vmxarea, cpu) = vmcs;
1252 }
1253 return 0;
1254}
1255
1256static __init int hardware_setup(void)
1257{
Yang, Sheng002c7f72007-07-31 14:23:01 +03001258 if (setup_vmcs_config(&vmcs_config) < 0)
1259 return -EIO;
Joerg Roedel50a37eb2008-01-31 14:57:38 +01001260
1261 if (boot_cpu_has(X86_FEATURE_NX))
1262 kvm_enable_efer_bits(EFER_NX);
1263
Avi Kivity6aa8b732006-12-10 02:21:36 -08001264 return alloc_kvm_area();
1265}
1266
1267static __exit void hardware_unsetup(void)
1268{
1269 free_kvm_area();
1270}
1271
Avi Kivity6aa8b732006-12-10 02:21:36 -08001272static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save)
1273{
1274 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1275
Avi Kivity6af11b92007-03-19 13:18:10 +02001276 if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001277 vmcs_write16(sf->selector, save->selector);
1278 vmcs_writel(sf->base, save->base);
1279 vmcs_write32(sf->limit, save->limit);
1280 vmcs_write32(sf->ar_bytes, save->ar);
1281 } else {
1282 u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK)
1283 << AR_DPL_SHIFT;
1284 vmcs_write32(sf->ar_bytes, 0x93 | dpl);
1285 }
1286}
1287
1288static void enter_pmode(struct kvm_vcpu *vcpu)
1289{
1290 unsigned long flags;
1291
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001292 vcpu->arch.rmode.active = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001293
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001294 vmcs_writel(GUEST_TR_BASE, vcpu->arch.rmode.tr.base);
1295 vmcs_write32(GUEST_TR_LIMIT, vcpu->arch.rmode.tr.limit);
1296 vmcs_write32(GUEST_TR_AR_BYTES, vcpu->arch.rmode.tr.ar);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001297
1298 flags = vmcs_readl(GUEST_RFLAGS);
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +01001299 flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001300 flags |= (vcpu->arch.rmode.save_iopl << IOPL_SHIFT);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001301 vmcs_writel(GUEST_RFLAGS, flags);
1302
Rusty Russell66aee912007-07-17 23:34:16 +10001303 vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
1304 (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001305
1306 update_exception_bitmap(vcpu);
1307
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001308 fix_pmode_dataseg(VCPU_SREG_ES, &vcpu->arch.rmode.es);
1309 fix_pmode_dataseg(VCPU_SREG_DS, &vcpu->arch.rmode.ds);
1310 fix_pmode_dataseg(VCPU_SREG_GS, &vcpu->arch.rmode.gs);
1311 fix_pmode_dataseg(VCPU_SREG_FS, &vcpu->arch.rmode.fs);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001312
1313 vmcs_write16(GUEST_SS_SELECTOR, 0);
1314 vmcs_write32(GUEST_SS_AR_BYTES, 0x93);
1315
1316 vmcs_write16(GUEST_CS_SELECTOR,
1317 vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK);
1318 vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
1319}
1320
Mike Dayd77c26f2007-10-08 09:02:08 -04001321static gva_t rmode_tss_base(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001322{
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001323 if (!kvm->arch.tss_addr) {
Izik Eiduscbc94022007-10-25 00:29:55 +02001324 gfn_t base_gfn = kvm->memslots[0].base_gfn +
1325 kvm->memslots[0].npages - 3;
1326 return base_gfn << PAGE_SHIFT;
1327 }
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001328 return kvm->arch.tss_addr;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001329}
1330
1331static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
1332{
1333 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1334
1335 save->selector = vmcs_read16(sf->selector);
1336 save->base = vmcs_readl(sf->base);
1337 save->limit = vmcs_read32(sf->limit);
1338 save->ar = vmcs_read32(sf->ar_bytes);
Jan Kiszka15b00f32007-11-19 10:21:45 +01001339 vmcs_write16(sf->selector, save->base >> 4);
1340 vmcs_write32(sf->base, save->base & 0xfffff);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001341 vmcs_write32(sf->limit, 0xffff);
1342 vmcs_write32(sf->ar_bytes, 0xf3);
1343}
1344
1345static void enter_rmode(struct kvm_vcpu *vcpu)
1346{
1347 unsigned long flags;
1348
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001349 vcpu->arch.rmode.active = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001350
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001351 vcpu->arch.rmode.tr.base = vmcs_readl(GUEST_TR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001352 vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));
1353
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001354 vcpu->arch.rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001355 vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);
1356
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001357 vcpu->arch.rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001358 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
1359
1360 flags = vmcs_readl(GUEST_RFLAGS);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001361 vcpu->arch.rmode.save_iopl
1362 = (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001363
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +01001364 flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001365
1366 vmcs_writel(GUEST_RFLAGS, flags);
Rusty Russell66aee912007-07-17 23:34:16 +10001367 vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001368 update_exception_bitmap(vcpu);
1369
1370 vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4);
1371 vmcs_write32(GUEST_SS_LIMIT, 0xffff);
1372 vmcs_write32(GUEST_SS_AR_BYTES, 0xf3);
1373
1374 vmcs_write32(GUEST_CS_AR_BYTES, 0xf3);
Michael Riepeabacf8d2006-12-22 01:05:45 -08001375 vmcs_write32(GUEST_CS_LIMIT, 0xffff);
Avi Kivity8cb5b032007-03-20 18:40:40 +02001376 if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000)
1377 vmcs_writel(GUEST_CS_BASE, 0xf0000);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001378 vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4);
1379
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001380 fix_rmode_seg(VCPU_SREG_ES, &vcpu->arch.rmode.es);
1381 fix_rmode_seg(VCPU_SREG_DS, &vcpu->arch.rmode.ds);
1382 fix_rmode_seg(VCPU_SREG_GS, &vcpu->arch.rmode.gs);
1383 fix_rmode_seg(VCPU_SREG_FS, &vcpu->arch.rmode.fs);
Avi Kivity75880a02007-06-20 11:20:04 +03001384
Eddie Dong8668a3c2007-10-10 14:26:45 +08001385 kvm_mmu_reset_context(vcpu);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08001386 init_rmode(vcpu->kvm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001387}
1388
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001389#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001390
1391static void enter_lmode(struct kvm_vcpu *vcpu)
1392{
1393 u32 guest_tr_ar;
1394
1395 guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES);
1396 if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) {
1397 printk(KERN_DEBUG "%s: tss fixup for long mode. \n",
Harvey Harrisonb8688d52008-03-03 12:59:56 -08001398 __func__);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001399 vmcs_write32(GUEST_TR_AR_BYTES,
1400 (guest_tr_ar & ~AR_TYPE_MASK)
1401 | AR_TYPE_BUSY_64_TSS);
1402 }
1403
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001404 vcpu->arch.shadow_efer |= EFER_LMA;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001405
Rusty Russell8b9cf982007-07-30 16:31:43 +10001406 find_msr_entry(to_vmx(vcpu), MSR_EFER)->data |= EFER_LMA | EFER_LME;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001407 vmcs_write32(VM_ENTRY_CONTROLS,
1408 vmcs_read32(VM_ENTRY_CONTROLS)
Li, Xin B1e4e6e02007-08-01 21:49:10 +03001409 | VM_ENTRY_IA32E_MODE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001410}
1411
1412static void exit_lmode(struct kvm_vcpu *vcpu)
1413{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001414 vcpu->arch.shadow_efer &= ~EFER_LMA;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001415
1416 vmcs_write32(VM_ENTRY_CONTROLS,
1417 vmcs_read32(VM_ENTRY_CONTROLS)
Li, Xin B1e4e6e02007-08-01 21:49:10 +03001418 & ~VM_ENTRY_IA32E_MODE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001419}
1420
1421#endif
1422
Sheng Yang2384d2b2008-01-17 15:14:33 +08001423static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
1424{
1425 vpid_sync_vcpu_all(to_vmx(vcpu));
Sheng Yang4e1096d2008-07-06 19:16:51 +08001426 if (vm_need_ept())
1427 ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa));
Sheng Yang2384d2b2008-01-17 15:14:33 +08001428}
1429
Anthony Liguori25c4c272007-04-27 09:29:21 +03001430static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
Avi Kivity399badf2007-01-05 16:36:38 -08001431{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001432 vcpu->arch.cr4 &= KVM_GUEST_CR4_MASK;
1433 vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK;
Avi Kivity399badf2007-01-05 16:36:38 -08001434}
1435
Sheng Yang14394422008-04-28 12:24:45 +08001436static void ept_load_pdptrs(struct kvm_vcpu *vcpu)
1437{
1438 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
1439 if (!load_pdptrs(vcpu, vcpu->arch.cr3)) {
1440 printk(KERN_ERR "EPT: Fail to load pdptrs!\n");
1441 return;
1442 }
1443 vmcs_write64(GUEST_PDPTR0, vcpu->arch.pdptrs[0]);
1444 vmcs_write64(GUEST_PDPTR1, vcpu->arch.pdptrs[1]);
1445 vmcs_write64(GUEST_PDPTR2, vcpu->arch.pdptrs[2]);
1446 vmcs_write64(GUEST_PDPTR3, vcpu->arch.pdptrs[3]);
1447 }
1448}
1449
1450static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
1451
1452static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
1453 unsigned long cr0,
1454 struct kvm_vcpu *vcpu)
1455{
1456 if (!(cr0 & X86_CR0_PG)) {
1457 /* From paging/starting to nonpaging */
1458 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08001459 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
Sheng Yang14394422008-04-28 12:24:45 +08001460 (CPU_BASED_CR3_LOAD_EXITING |
1461 CPU_BASED_CR3_STORE_EXITING));
1462 vcpu->arch.cr0 = cr0;
1463 vmx_set_cr4(vcpu, vcpu->arch.cr4);
1464 *hw_cr0 |= X86_CR0_PE | X86_CR0_PG;
1465 *hw_cr0 &= ~X86_CR0_WP;
1466 } else if (!is_paging(vcpu)) {
1467 /* From nonpaging to paging */
1468 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08001469 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
Sheng Yang14394422008-04-28 12:24:45 +08001470 ~(CPU_BASED_CR3_LOAD_EXITING |
1471 CPU_BASED_CR3_STORE_EXITING));
1472 vcpu->arch.cr0 = cr0;
1473 vmx_set_cr4(vcpu, vcpu->arch.cr4);
1474 if (!(vcpu->arch.cr0 & X86_CR0_WP))
1475 *hw_cr0 &= ~X86_CR0_WP;
1476 }
1477}
1478
1479static void ept_update_paging_mode_cr4(unsigned long *hw_cr4,
1480 struct kvm_vcpu *vcpu)
1481{
1482 if (!is_paging(vcpu)) {
1483 *hw_cr4 &= ~X86_CR4_PAE;
1484 *hw_cr4 |= X86_CR4_PSE;
1485 } else if (!(vcpu->arch.cr4 & X86_CR4_PAE))
1486 *hw_cr4 &= ~X86_CR4_PAE;
1487}
1488
Avi Kivity6aa8b732006-12-10 02:21:36 -08001489static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
1490{
Sheng Yang14394422008-04-28 12:24:45 +08001491 unsigned long hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) |
1492 KVM_VM_CR0_ALWAYS_ON;
1493
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001494 vmx_fpu_deactivate(vcpu);
1495
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001496 if (vcpu->arch.rmode.active && (cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001497 enter_pmode(vcpu);
1498
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001499 if (!vcpu->arch.rmode.active && !(cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001500 enter_rmode(vcpu);
1501
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001502#ifdef CONFIG_X86_64
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001503 if (vcpu->arch.shadow_efer & EFER_LME) {
Rusty Russell707d92fa2007-07-17 23:19:08 +10001504 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001505 enter_lmode(vcpu);
Rusty Russell707d92fa2007-07-17 23:19:08 +10001506 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001507 exit_lmode(vcpu);
1508 }
1509#endif
1510
Sheng Yang14394422008-04-28 12:24:45 +08001511 if (vm_need_ept())
1512 ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu);
1513
Avi Kivity6aa8b732006-12-10 02:21:36 -08001514 vmcs_writel(CR0_READ_SHADOW, cr0);
Sheng Yang14394422008-04-28 12:24:45 +08001515 vmcs_writel(GUEST_CR0, hw_cr0);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001516 vcpu->arch.cr0 = cr0;
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001517
Rusty Russell707d92fa2007-07-17 23:19:08 +10001518 if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE))
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001519 vmx_fpu_activate(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001520}
1521
Sheng Yang14394422008-04-28 12:24:45 +08001522static u64 construct_eptp(unsigned long root_hpa)
1523{
1524 u64 eptp;
1525
1526 /* TODO write the value reading from MSR */
1527 eptp = VMX_EPT_DEFAULT_MT |
1528 VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT;
1529 eptp |= (root_hpa & PAGE_MASK);
1530
1531 return eptp;
1532}
1533
Avi Kivity6aa8b732006-12-10 02:21:36 -08001534static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
1535{
Sheng Yang14394422008-04-28 12:24:45 +08001536 unsigned long guest_cr3;
1537 u64 eptp;
1538
1539 guest_cr3 = cr3;
1540 if (vm_need_ept()) {
1541 eptp = construct_eptp(cr3);
1542 vmcs_write64(EPT_POINTER, eptp);
1543 ept_sync_context(eptp);
1544 ept_load_pdptrs(vcpu);
1545 guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 :
1546 VMX_EPT_IDENTITY_PAGETABLE_ADDR;
1547 }
1548
Sheng Yang2384d2b2008-01-17 15:14:33 +08001549 vmx_flush_tlb(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08001550 vmcs_writel(GUEST_CR3, guest_cr3);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001551 if (vcpu->arch.cr0 & X86_CR0_PE)
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001552 vmx_fpu_deactivate(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001553}
1554
1555static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
1556{
Sheng Yang14394422008-04-28 12:24:45 +08001557 unsigned long hw_cr4 = cr4 | (vcpu->arch.rmode.active ?
1558 KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);
1559
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001560 vcpu->arch.cr4 = cr4;
Sheng Yang14394422008-04-28 12:24:45 +08001561 if (vm_need_ept())
1562 ept_update_paging_mode_cr4(&hw_cr4, vcpu);
1563
1564 vmcs_writel(CR4_READ_SHADOW, cr4);
1565 vmcs_writel(GUEST_CR4, hw_cr4);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001566}
1567
Avi Kivity6aa8b732006-12-10 02:21:36 -08001568static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
1569{
Rusty Russell8b9cf982007-07-30 16:31:43 +10001570 struct vcpu_vmx *vmx = to_vmx(vcpu);
1571 struct kvm_msr_entry *msr = find_msr_entry(vmx, MSR_EFER);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001572
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001573 vcpu->arch.shadow_efer = efer;
Joerg Roedel9f62e192008-01-31 14:57:39 +01001574 if (!msr)
1575 return;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001576 if (efer & EFER_LMA) {
1577 vmcs_write32(VM_ENTRY_CONTROLS,
1578 vmcs_read32(VM_ENTRY_CONTROLS) |
Li, Xin B1e4e6e02007-08-01 21:49:10 +03001579 VM_ENTRY_IA32E_MODE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001580 msr->data = efer;
1581
1582 } else {
1583 vmcs_write32(VM_ENTRY_CONTROLS,
1584 vmcs_read32(VM_ENTRY_CONTROLS) &
Li, Xin B1e4e6e02007-08-01 21:49:10 +03001585 ~VM_ENTRY_IA32E_MODE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001586
1587 msr->data = efer & ~EFER_LME;
1588 }
Rusty Russell8b9cf982007-07-30 16:31:43 +10001589 setup_msrs(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001590}
1591
Avi Kivity6aa8b732006-12-10 02:21:36 -08001592static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg)
1593{
1594 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1595
1596 return vmcs_readl(sf->base);
1597}
1598
1599static void vmx_get_segment(struct kvm_vcpu *vcpu,
1600 struct kvm_segment *var, int seg)
1601{
1602 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1603 u32 ar;
1604
1605 var->base = vmcs_readl(sf->base);
1606 var->limit = vmcs_read32(sf->limit);
1607 var->selector = vmcs_read16(sf->selector);
1608 ar = vmcs_read32(sf->ar_bytes);
1609 if (ar & AR_UNUSABLE_MASK)
1610 ar = 0;
1611 var->type = ar & 15;
1612 var->s = (ar >> 4) & 1;
1613 var->dpl = (ar >> 5) & 3;
1614 var->present = (ar >> 7) & 1;
1615 var->avl = (ar >> 12) & 1;
1616 var->l = (ar >> 13) & 1;
1617 var->db = (ar >> 14) & 1;
1618 var->g = (ar >> 15) & 1;
1619 var->unusable = (ar >> 16) & 1;
1620}
1621
Izik Eidus2e4d2652008-03-24 19:38:34 +02001622static int vmx_get_cpl(struct kvm_vcpu *vcpu)
1623{
1624 struct kvm_segment kvm_seg;
1625
1626 if (!(vcpu->arch.cr0 & X86_CR0_PE)) /* if real mode */
1627 return 0;
1628
1629 if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */
1630 return 3;
1631
1632 vmx_get_segment(vcpu, &kvm_seg, VCPU_SREG_CS);
1633 return kvm_seg.selector & 3;
1634}
1635
Avi Kivity653e3102007-05-07 10:55:37 +03001636static u32 vmx_segment_access_rights(struct kvm_segment *var)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001637{
Avi Kivity6aa8b732006-12-10 02:21:36 -08001638 u32 ar;
1639
Avi Kivity653e3102007-05-07 10:55:37 +03001640 if (var->unusable)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001641 ar = 1 << 16;
1642 else {
1643 ar = var->type & 15;
1644 ar |= (var->s & 1) << 4;
1645 ar |= (var->dpl & 3) << 5;
1646 ar |= (var->present & 1) << 7;
1647 ar |= (var->avl & 1) << 12;
1648 ar |= (var->l & 1) << 13;
1649 ar |= (var->db & 1) << 14;
1650 ar |= (var->g & 1) << 15;
1651 }
Uri Lublinf7fbf1f2006-12-13 00:34:00 -08001652 if (ar == 0) /* a 0 value means unusable */
1653 ar = AR_UNUSABLE_MASK;
Avi Kivity653e3102007-05-07 10:55:37 +03001654
1655 return ar;
1656}
1657
1658static void vmx_set_segment(struct kvm_vcpu *vcpu,
1659 struct kvm_segment *var, int seg)
1660{
1661 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1662 u32 ar;
1663
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001664 if (vcpu->arch.rmode.active && seg == VCPU_SREG_TR) {
1665 vcpu->arch.rmode.tr.selector = var->selector;
1666 vcpu->arch.rmode.tr.base = var->base;
1667 vcpu->arch.rmode.tr.limit = var->limit;
1668 vcpu->arch.rmode.tr.ar = vmx_segment_access_rights(var);
Avi Kivity653e3102007-05-07 10:55:37 +03001669 return;
1670 }
1671 vmcs_writel(sf->base, var->base);
1672 vmcs_write32(sf->limit, var->limit);
1673 vmcs_write16(sf->selector, var->selector);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001674 if (vcpu->arch.rmode.active && var->s) {
Avi Kivity653e3102007-05-07 10:55:37 +03001675 /*
1676 * Hack real-mode segments into vm86 compatibility.
1677 */
1678 if (var->base == 0xffff0000 && var->selector == 0xf000)
1679 vmcs_writel(sf->base, 0xf0000);
1680 ar = 0xf3;
1681 } else
1682 ar = vmx_segment_access_rights(var);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001683 vmcs_write32(sf->ar_bytes, ar);
1684}
1685
Avi Kivity6aa8b732006-12-10 02:21:36 -08001686static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
1687{
1688 u32 ar = vmcs_read32(GUEST_CS_AR_BYTES);
1689
1690 *db = (ar >> 14) & 1;
1691 *l = (ar >> 13) & 1;
1692}
1693
1694static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1695{
1696 dt->limit = vmcs_read32(GUEST_IDTR_LIMIT);
1697 dt->base = vmcs_readl(GUEST_IDTR_BASE);
1698}
1699
1700static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1701{
1702 vmcs_write32(GUEST_IDTR_LIMIT, dt->limit);
1703 vmcs_writel(GUEST_IDTR_BASE, dt->base);
1704}
1705
1706static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1707{
1708 dt->limit = vmcs_read32(GUEST_GDTR_LIMIT);
1709 dt->base = vmcs_readl(GUEST_GDTR_BASE);
1710}
1711
1712static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1713{
1714 vmcs_write32(GUEST_GDTR_LIMIT, dt->limit);
1715 vmcs_writel(GUEST_GDTR_BASE, dt->base);
1716}
1717
Mike Dayd77c26f2007-10-08 09:02:08 -04001718static int init_rmode_tss(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001719{
Avi Kivity6aa8b732006-12-10 02:21:36 -08001720 gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
Izik Eidus195aefd2007-10-01 22:14:18 +02001721 u16 data = 0;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05001722 int ret = 0;
Izik Eidus195aefd2007-10-01 22:14:18 +02001723 int r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001724
Izik Eidus195aefd2007-10-01 22:14:18 +02001725 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
1726 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05001727 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02001728 data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
1729 r = kvm_write_guest_page(kvm, fn++, &data, 0x66, sizeof(u16));
1730 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05001731 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02001732 r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
1733 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05001734 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02001735 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
1736 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05001737 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02001738 data = ~0;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05001739 r = kvm_write_guest_page(kvm, fn, &data,
1740 RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
1741 sizeof(u8));
Izik Eidus195aefd2007-10-01 22:14:18 +02001742 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05001743 goto out;
1744
1745 ret = 1;
1746out:
Marcelo Tosatti10589a42007-12-20 19:18:22 -05001747 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001748}
1749
Sheng Yangb7ebfb02008-04-25 21:44:52 +08001750static int init_rmode_identity_map(struct kvm *kvm)
1751{
1752 int i, r, ret;
1753 pfn_t identity_map_pfn;
1754 u32 tmp;
1755
1756 if (!vm_need_ept())
1757 return 1;
1758 if (unlikely(!kvm->arch.ept_identity_pagetable)) {
1759 printk(KERN_ERR "EPT: identity-mapping pagetable "
1760 "haven't been allocated!\n");
1761 return 0;
1762 }
1763 if (likely(kvm->arch.ept_identity_pagetable_done))
1764 return 1;
1765 ret = 0;
1766 identity_map_pfn = VMX_EPT_IDENTITY_PAGETABLE_ADDR >> PAGE_SHIFT;
1767 r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE);
1768 if (r < 0)
1769 goto out;
1770 /* Set up identity-mapping pagetable for EPT in real mode */
1771 for (i = 0; i < PT32_ENT_PER_PAGE; i++) {
1772 tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
1773 _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
1774 r = kvm_write_guest_page(kvm, identity_map_pfn,
1775 &tmp, i * sizeof(tmp), sizeof(tmp));
1776 if (r < 0)
1777 goto out;
1778 }
1779 kvm->arch.ept_identity_pagetable_done = true;
1780 ret = 1;
1781out:
1782 return ret;
1783}
1784
Avi Kivity6aa8b732006-12-10 02:21:36 -08001785static void seg_setup(int seg)
1786{
1787 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1788
1789 vmcs_write16(sf->selector, 0);
1790 vmcs_writel(sf->base, 0);
1791 vmcs_write32(sf->limit, 0xffff);
1792 vmcs_write32(sf->ar_bytes, 0x93);
1793}
1794
Sheng Yangf78e0e22007-10-29 09:40:42 +08001795static int alloc_apic_access_page(struct kvm *kvm)
1796{
1797 struct kvm_userspace_memory_region kvm_userspace_mem;
1798 int r = 0;
1799
Izik Eidus72dc67a2008-02-10 18:04:15 +02001800 down_write(&kvm->slots_lock);
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001801 if (kvm->arch.apic_access_page)
Sheng Yangf78e0e22007-10-29 09:40:42 +08001802 goto out;
1803 kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
1804 kvm_userspace_mem.flags = 0;
1805 kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL;
1806 kvm_userspace_mem.memory_size = PAGE_SIZE;
1807 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
1808 if (r)
1809 goto out;
Izik Eidus72dc67a2008-02-10 18:04:15 +02001810
1811 down_read(&current->mm->mmap_sem);
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001812 kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
Izik Eidus72dc67a2008-02-10 18:04:15 +02001813 up_read(&current->mm->mmap_sem);
Sheng Yangf78e0e22007-10-29 09:40:42 +08001814out:
Izik Eidus72dc67a2008-02-10 18:04:15 +02001815 up_write(&kvm->slots_lock);
Sheng Yangf78e0e22007-10-29 09:40:42 +08001816 return r;
1817}
1818
Sheng Yangb7ebfb02008-04-25 21:44:52 +08001819static int alloc_identity_pagetable(struct kvm *kvm)
1820{
1821 struct kvm_userspace_memory_region kvm_userspace_mem;
1822 int r = 0;
1823
1824 down_write(&kvm->slots_lock);
1825 if (kvm->arch.ept_identity_pagetable)
1826 goto out;
1827 kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT;
1828 kvm_userspace_mem.flags = 0;
1829 kvm_userspace_mem.guest_phys_addr = VMX_EPT_IDENTITY_PAGETABLE_ADDR;
1830 kvm_userspace_mem.memory_size = PAGE_SIZE;
1831 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
1832 if (r)
1833 goto out;
1834
1835 down_read(&current->mm->mmap_sem);
1836 kvm->arch.ept_identity_pagetable = gfn_to_page(kvm,
1837 VMX_EPT_IDENTITY_PAGETABLE_ADDR >> PAGE_SHIFT);
1838 up_read(&current->mm->mmap_sem);
1839out:
1840 up_write(&kvm->slots_lock);
1841 return r;
1842}
1843
Sheng Yang2384d2b2008-01-17 15:14:33 +08001844static void allocate_vpid(struct vcpu_vmx *vmx)
1845{
1846 int vpid;
1847
1848 vmx->vpid = 0;
1849 if (!enable_vpid || !cpu_has_vmx_vpid())
1850 return;
1851 spin_lock(&vmx_vpid_lock);
1852 vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
1853 if (vpid < VMX_NR_VPIDS) {
1854 vmx->vpid = vpid;
1855 __set_bit(vpid, vmx_vpid_bitmap);
1856 }
1857 spin_unlock(&vmx_vpid_lock);
1858}
1859
Harvey Harrison8b2cf732008-04-27 12:14:13 -07001860static void vmx_disable_intercept_for_msr(struct page *msr_bitmap, u32 msr)
Sheng Yang25c5f222008-03-28 13:18:56 +08001861{
1862 void *va;
1863
1864 if (!cpu_has_vmx_msr_bitmap())
1865 return;
1866
1867 /*
1868 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
1869 * have the write-low and read-high bitmap offsets the wrong way round.
1870 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
1871 */
1872 va = kmap(msr_bitmap);
1873 if (msr <= 0x1fff) {
1874 __clear_bit(msr, va + 0x000); /* read-low */
1875 __clear_bit(msr, va + 0x800); /* write-low */
1876 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
1877 msr &= 0x1fff;
1878 __clear_bit(msr, va + 0x400); /* read-high */
1879 __clear_bit(msr, va + 0xc00); /* write-high */
1880 }
1881 kunmap(msr_bitmap);
1882}
1883
Avi Kivity6aa8b732006-12-10 02:21:36 -08001884/*
1885 * Sets up the vmcs for emulated real mode.
1886 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10001887static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001888{
1889 u32 host_sysenter_cs;
1890 u32 junk;
1891 unsigned long a;
1892 struct descriptor_table dt;
1893 int i;
Avi Kivitycd2276a2007-05-14 20:41:13 +03001894 unsigned long kvm_vmx_return;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08001895 u32 exec_control;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001896
Avi Kivity6aa8b732006-12-10 02:21:36 -08001897 /* I/O */
He, Qingfdef3ad2007-04-30 09:45:24 +03001898 vmcs_write64(IO_BITMAP_A, page_to_phys(vmx_io_bitmap_a));
1899 vmcs_write64(IO_BITMAP_B, page_to_phys(vmx_io_bitmap_b));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001900
Sheng Yang25c5f222008-03-28 13:18:56 +08001901 if (cpu_has_vmx_msr_bitmap())
1902 vmcs_write64(MSR_BITMAP, page_to_phys(vmx_msr_bitmap));
1903
Avi Kivity6aa8b732006-12-10 02:21:36 -08001904 vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */
1905
Avi Kivity6aa8b732006-12-10 02:21:36 -08001906 /* Control */
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001907 vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
1908 vmcs_config.pin_based_exec_ctrl);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08001909
1910 exec_control = vmcs_config.cpu_based_exec_ctrl;
1911 if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) {
1912 exec_control &= ~CPU_BASED_TPR_SHADOW;
1913#ifdef CONFIG_X86_64
1914 exec_control |= CPU_BASED_CR8_STORE_EXITING |
1915 CPU_BASED_CR8_LOAD_EXITING;
1916#endif
1917 }
Sheng Yangd56f5462008-04-25 10:13:16 +08001918 if (!vm_need_ept())
1919 exec_control |= CPU_BASED_CR3_STORE_EXITING |
1920 CPU_BASED_CR3_LOAD_EXITING;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08001921 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001922
Sheng Yang83ff3b92007-11-21 14:33:25 +08001923 if (cpu_has_secondary_exec_ctrls()) {
1924 exec_control = vmcs_config.cpu_based_2nd_exec_ctrl;
1925 if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
1926 exec_control &=
1927 ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
Sheng Yang2384d2b2008-01-17 15:14:33 +08001928 if (vmx->vpid == 0)
1929 exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
Sheng Yangd56f5462008-04-25 10:13:16 +08001930 if (!vm_need_ept())
1931 exec_control &= ~SECONDARY_EXEC_ENABLE_EPT;
Sheng Yang83ff3b92007-11-21 14:33:25 +08001932 vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
1933 }
Sheng Yangf78e0e22007-10-29 09:40:42 +08001934
Avi Kivityc7addb92007-09-16 18:58:32 +02001935 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf);
1936 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001937 vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */
1938
1939 vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */
1940 vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */
1941 vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */
1942
1943 vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */
1944 vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
1945 vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +03001946 vmcs_write16(HOST_FS_SELECTOR, kvm_read_fs()); /* 22.2.4 */
1947 vmcs_write16(HOST_GS_SELECTOR, kvm_read_gs()); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001948 vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001949#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001950 rdmsrl(MSR_FS_BASE, a);
1951 vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */
1952 rdmsrl(MSR_GS_BASE, a);
1953 vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */
1954#else
1955 vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */
1956 vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */
1957#endif
1958
1959 vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */
1960
Avi Kivityd6e88ae2008-07-10 16:53:33 +03001961 kvm_get_idt(&dt);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001962 vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */
1963
Mike Dayd77c26f2007-10-08 09:02:08 -04001964 asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return));
Avi Kivitycd2276a2007-05-14 20:41:13 +03001965 vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */
Eddie Dong2cc51562007-05-21 07:28:09 +03001966 vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
1967 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
1968 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001969
1970 rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk);
1971 vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs);
1972 rdmsrl(MSR_IA32_SYSENTER_ESP, a);
1973 vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */
1974 rdmsrl(MSR_IA32_SYSENTER_EIP, a);
1975 vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */
1976
Avi Kivity6aa8b732006-12-10 02:21:36 -08001977 for (i = 0; i < NR_VMX_MSR; ++i) {
1978 u32 index = vmx_msr_index[i];
1979 u32 data_low, data_high;
1980 u64 data;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001981 int j = vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001982
1983 if (rdmsr_safe(index, &data_low, &data_high) < 0)
1984 continue;
Avi Kivity432bd6c2007-01-31 23:48:13 -08001985 if (wrmsr_safe(index, data_low, data_high) < 0)
1986 continue;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001987 data = data_low | ((u64)data_high << 32);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001988 vmx->host_msrs[j].index = index;
1989 vmx->host_msrs[j].reserved = 0;
1990 vmx->host_msrs[j].data = data;
1991 vmx->guest_msrs[j] = vmx->host_msrs[j];
1992 ++vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001993 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001994
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001995 vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001996
1997 /* 22.2.1, 20.8.1 */
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001998 vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl);
1999
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002000 vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
2001 vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK);
2002
Sheng Yangf78e0e22007-10-29 09:40:42 +08002003
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002004 return 0;
2005}
2006
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002007static int init_rmode(struct kvm *kvm)
2008{
2009 if (!init_rmode_tss(kvm))
2010 return 0;
2011 if (!init_rmode_identity_map(kvm))
2012 return 0;
2013 return 1;
2014}
2015
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002016static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
2017{
2018 struct vcpu_vmx *vmx = to_vmx(vcpu);
2019 u64 msr;
2020 int ret;
2021
Marcelo Tosatti3200f402008-03-29 20:17:59 -03002022 down_read(&vcpu->kvm->slots_lock);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002023 if (!init_rmode(vmx->vcpu.kvm)) {
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002024 ret = -ENOMEM;
2025 goto out;
2026 }
2027
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002028 vmx->vcpu.arch.rmode.active = 0;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002029
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002030 vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val();
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02002031 kvm_set_cr8(&vmx->vcpu, 0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002032 msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
2033 if (vmx->vcpu.vcpu_id == 0)
2034 msr |= MSR_IA32_APICBASE_BSP;
2035 kvm_set_apic_base(&vmx->vcpu, msr);
2036
2037 fx_init(&vmx->vcpu);
2038
2039 /*
2040 * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
2041 * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh.
2042 */
2043 if (vmx->vcpu.vcpu_id == 0) {
2044 vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
2045 vmcs_writel(GUEST_CS_BASE, 0x000f0000);
2046 } else {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002047 vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8);
2048 vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002049 }
2050 vmcs_write32(GUEST_CS_LIMIT, 0xffff);
2051 vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
2052
2053 seg_setup(VCPU_SREG_DS);
2054 seg_setup(VCPU_SREG_ES);
2055 seg_setup(VCPU_SREG_FS);
2056 seg_setup(VCPU_SREG_GS);
2057 seg_setup(VCPU_SREG_SS);
2058
2059 vmcs_write16(GUEST_TR_SELECTOR, 0);
2060 vmcs_writel(GUEST_TR_BASE, 0);
2061 vmcs_write32(GUEST_TR_LIMIT, 0xffff);
2062 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
2063
2064 vmcs_write16(GUEST_LDTR_SELECTOR, 0);
2065 vmcs_writel(GUEST_LDTR_BASE, 0);
2066 vmcs_write32(GUEST_LDTR_LIMIT, 0xffff);
2067 vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082);
2068
2069 vmcs_write32(GUEST_SYSENTER_CS, 0);
2070 vmcs_writel(GUEST_SYSENTER_ESP, 0);
2071 vmcs_writel(GUEST_SYSENTER_EIP, 0);
2072
2073 vmcs_writel(GUEST_RFLAGS, 0x02);
2074 if (vmx->vcpu.vcpu_id == 0)
2075 vmcs_writel(GUEST_RIP, 0xfff0);
2076 else
2077 vmcs_writel(GUEST_RIP, 0);
2078 vmcs_writel(GUEST_RSP, 0);
2079
2080 /* todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0 */
2081 vmcs_writel(GUEST_DR7, 0x400);
2082
2083 vmcs_writel(GUEST_GDTR_BASE, 0);
2084 vmcs_write32(GUEST_GDTR_LIMIT, 0xffff);
2085
2086 vmcs_writel(GUEST_IDTR_BASE, 0);
2087 vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
2088
2089 vmcs_write32(GUEST_ACTIVITY_STATE, 0);
2090 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
2091 vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
2092
2093 guest_write_tsc(0);
2094
2095 /* Special registers */
2096 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
2097
2098 setup_msrs(vmx);
2099
Avi Kivity6aa8b732006-12-10 02:21:36 -08002100 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */
2101
Sheng Yangf78e0e22007-10-29 09:40:42 +08002102 if (cpu_has_vmx_tpr_shadow()) {
2103 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0);
2104 if (vm_need_tpr_shadow(vmx->vcpu.kvm))
2105 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR,
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002106 page_to_phys(vmx->vcpu.arch.apic->regs_page));
Sheng Yangf78e0e22007-10-29 09:40:42 +08002107 vmcs_write32(TPR_THRESHOLD, 0);
2108 }
2109
2110 if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
2111 vmcs_write64(APIC_ACCESS_ADDR,
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002112 page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002113
Sheng Yang2384d2b2008-01-17 15:14:33 +08002114 if (vmx->vpid != 0)
2115 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
2116
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002117 vmx->vcpu.arch.cr0 = 0x60000010;
2118 vmx_set_cr0(&vmx->vcpu, vmx->vcpu.arch.cr0); /* enter rmode */
Rusty Russell8b9cf982007-07-30 16:31:43 +10002119 vmx_set_cr4(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10002120 vmx_set_efer(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10002121 vmx_fpu_activate(&vmx->vcpu);
2122 update_exception_bitmap(&vmx->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002123
Sheng Yang2384d2b2008-01-17 15:14:33 +08002124 vpid_sync_vcpu_all(vmx);
2125
Marcelo Tosatti3200f402008-03-29 20:17:59 -03002126 ret = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002127
Avi Kivity6aa8b732006-12-10 02:21:36 -08002128out:
Marcelo Tosatti3200f402008-03-29 20:17:59 -03002129 up_read(&vcpu->kvm->slots_lock);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002130 return ret;
2131}
2132
Eddie Dong85f455f2007-07-06 12:20:49 +03002133static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq)
2134{
Avi Kivity9c8cba32007-11-22 11:42:59 +02002135 struct vcpu_vmx *vmx = to_vmx(vcpu);
2136
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002137 KVMTRACE_1D(INJ_VIRQ, vcpu, (u32)irq, handler);
2138
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002139 if (vcpu->arch.rmode.active) {
Avi Kivity9c8cba32007-11-22 11:42:59 +02002140 vmx->rmode.irq.pending = true;
2141 vmx->rmode.irq.vector = irq;
2142 vmx->rmode.irq.rip = vmcs_readl(GUEST_RIP);
Avi Kivity9c5623e2007-11-08 18:19:20 +02002143 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2144 irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK);
2145 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1);
Avi Kivity9c8cba32007-11-22 11:42:59 +02002146 vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip - 1);
Eddie Dong85f455f2007-07-06 12:20:49 +03002147 return;
2148 }
2149 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2150 irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
2151}
2152
Sheng Yangf08864b2008-05-15 18:23:25 +08002153static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
2154{
2155 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2156 INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
2157 vcpu->arch.nmi_pending = 0;
2158}
2159
Avi Kivity6aa8b732006-12-10 02:21:36 -08002160static void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
2161{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002162 int word_index = __ffs(vcpu->arch.irq_summary);
2163 int bit_index = __ffs(vcpu->arch.irq_pending[word_index]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002164 int irq = word_index * BITS_PER_LONG + bit_index;
2165
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002166 clear_bit(bit_index, &vcpu->arch.irq_pending[word_index]);
2167 if (!vcpu->arch.irq_pending[word_index])
2168 clear_bit(word_index, &vcpu->arch.irq_summary);
Eddie Dong85f455f2007-07-06 12:20:49 +03002169 vmx_inject_irq(vcpu, irq);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002170}
2171
Dor Laorc1150d82007-01-05 16:36:24 -08002172
2173static void do_interrupt_requests(struct kvm_vcpu *vcpu,
2174 struct kvm_run *kvm_run)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002175{
Dor Laorc1150d82007-01-05 16:36:24 -08002176 u32 cpu_based_vm_exec_control;
2177
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002178 vcpu->arch.interrupt_window_open =
Dor Laorc1150d82007-01-05 16:36:24 -08002179 ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
2180 (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0);
2181
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002182 if (vcpu->arch.interrupt_window_open &&
2183 vcpu->arch.irq_summary &&
Dor Laorc1150d82007-01-05 16:36:24 -08002184 !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK))
Avi Kivity6aa8b732006-12-10 02:21:36 -08002185 /*
Dor Laorc1150d82007-01-05 16:36:24 -08002186 * If interrupts enabled, and not blocked by sti or mov ss. Good.
Avi Kivity6aa8b732006-12-10 02:21:36 -08002187 */
2188 kvm_do_inject_irq(vcpu);
Dor Laorc1150d82007-01-05 16:36:24 -08002189
2190 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002191 if (!vcpu->arch.interrupt_window_open &&
2192 (vcpu->arch.irq_summary || kvm_run->request_interrupt_window))
Avi Kivity6aa8b732006-12-10 02:21:36 -08002193 /*
2194 * Interrupts blocked. Wait for unblock.
2195 */
Dor Laorc1150d82007-01-05 16:36:24 -08002196 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
2197 else
2198 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
2199 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002200}
2201
Izik Eiduscbc94022007-10-25 00:29:55 +02002202static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
2203{
2204 int ret;
2205 struct kvm_userspace_memory_region tss_mem = {
2206 .slot = 8,
2207 .guest_phys_addr = addr,
2208 .memory_size = PAGE_SIZE * 3,
2209 .flags = 0,
2210 };
2211
2212 ret = kvm_set_memory_region(kvm, &tss_mem, 0);
2213 if (ret)
2214 return ret;
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002215 kvm->arch.tss_addr = addr;
Izik Eiduscbc94022007-10-25 00:29:55 +02002216 return 0;
2217}
2218
Avi Kivity6aa8b732006-12-10 02:21:36 -08002219static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu)
2220{
2221 struct kvm_guest_debug *dbg = &vcpu->guest_debug;
2222
2223 set_debugreg(dbg->bp[0], 0);
2224 set_debugreg(dbg->bp[1], 1);
2225 set_debugreg(dbg->bp[2], 2);
2226 set_debugreg(dbg->bp[3], 3);
2227
2228 if (dbg->singlestep) {
2229 unsigned long flags;
2230
2231 flags = vmcs_readl(GUEST_RFLAGS);
2232 flags |= X86_EFLAGS_TF | X86_EFLAGS_RF;
2233 vmcs_writel(GUEST_RFLAGS, flags);
2234 }
2235}
2236
2237static int handle_rmode_exception(struct kvm_vcpu *vcpu,
2238 int vec, u32 err_code)
2239{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002240 if (!vcpu->arch.rmode.active)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002241 return 0;
2242
Nitin A Kambleb3f37702007-05-17 15:50:34 +03002243 /*
2244 * Instruction with address size override prefix opcode 0x67
2245 * Cause the #SS fault with 0 error code in VM86 mode.
2246 */
2247 if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
Laurent Vivier34273182007-09-18 11:27:37 +02002248 if (emulate_instruction(vcpu, NULL, 0, 0, 0) == EMULATE_DONE)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002249 return 1;
2250 return 0;
2251}
2252
2253static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2254{
Avi Kivity1155f762007-11-22 11:30:47 +02002255 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002256 u32 intr_info, error_code;
2257 unsigned long cr2, rip;
2258 u32 vect_info;
2259 enum emulation_result er;
2260
Avi Kivity1155f762007-11-22 11:30:47 +02002261 vect_info = vmx->idt_vectoring_info;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002262 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
2263
2264 if ((vect_info & VECTORING_INFO_VALID_MASK) &&
Mike Dayd77c26f2007-10-08 09:02:08 -04002265 !is_page_fault(intr_info))
Avi Kivity6aa8b732006-12-10 02:21:36 -08002266 printk(KERN_ERR "%s: unexpected, vectoring info 0x%x "
Harvey Harrisonb8688d52008-03-03 12:59:56 -08002267 "intr info 0x%x\n", __func__, vect_info, intr_info);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002268
Eddie Dong85f455f2007-07-06 12:20:49 +03002269 if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08002270 int irq = vect_info & VECTORING_INFO_VECTOR_MASK;
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002271 set_bit(irq, vcpu->arch.irq_pending);
2272 set_bit(irq / BITS_PER_LONG, &vcpu->arch.irq_summary);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002273 }
2274
Avi Kivity1b6269d2007-10-09 12:12:19 +02002275 if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */
2276 return 1; /* already handled by vmx_vcpu_run() */
Anthony Liguori2ab455c2007-04-27 09:29:49 +03002277
2278 if (is_no_device(intr_info)) {
Avi Kivity5fd86fc2007-05-02 20:40:00 +03002279 vmx_fpu_activate(vcpu);
Anthony Liguori2ab455c2007-04-27 09:29:49 +03002280 return 1;
2281 }
2282
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05002283 if (is_invalid_opcode(intr_info)) {
Sheng Yang571008d2008-01-02 14:49:22 +08002284 er = emulate_instruction(vcpu, kvm_run, 0, 0, EMULTYPE_TRAP_UD);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05002285 if (er != EMULATE_DONE)
Avi Kivity7ee5d9402007-11-25 15:22:50 +02002286 kvm_queue_exception(vcpu, UD_VECTOR);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05002287 return 1;
2288 }
2289
Avi Kivity6aa8b732006-12-10 02:21:36 -08002290 error_code = 0;
2291 rip = vmcs_readl(GUEST_RIP);
Ryan Harper2e113842008-02-11 10:26:38 -06002292 if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002293 error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
2294 if (is_page_fault(intr_info)) {
Sheng Yang14394422008-04-28 12:24:45 +08002295 /* EPT won't cause page fault directly */
2296 if (vm_need_ept())
2297 BUG();
Avi Kivity6aa8b732006-12-10 02:21:36 -08002298 cr2 = vmcs_readl(EXIT_QUALIFICATION);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002299 KVMTRACE_3D(PAGE_FAULT, vcpu, error_code, (u32)cr2,
2300 (u32)((u64)cr2 >> 32), handler);
Avi Kivity577bdc42008-07-19 08:57:05 +03002301 if (vect_info & VECTORING_INFO_VALID_MASK)
2302 kvm_mmu_unprotect_page_virt(vcpu, cr2);
Avi Kivity30677142007-10-28 18:48:59 +02002303 return kvm_mmu_page_fault(vcpu, cr2, error_code);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002304 }
2305
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002306 if (vcpu->arch.rmode.active &&
Avi Kivity6aa8b732006-12-10 02:21:36 -08002307 handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
Avi Kivity72d6e5a2007-06-05 16:15:51 +03002308 error_code)) {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002309 if (vcpu->arch.halt_request) {
2310 vcpu->arch.halt_request = 0;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03002311 return kvm_emulate_halt(vcpu);
2312 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002313 return 1;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03002314 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002315
Mike Dayd77c26f2007-10-08 09:02:08 -04002316 if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) ==
2317 (INTR_TYPE_EXCEPTION | 1)) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08002318 kvm_run->exit_reason = KVM_EXIT_DEBUG;
2319 return 0;
2320 }
2321 kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
2322 kvm_run->ex.exception = intr_info & INTR_INFO_VECTOR_MASK;
2323 kvm_run->ex.error_code = error_code;
2324 return 0;
2325}
2326
2327static int handle_external_interrupt(struct kvm_vcpu *vcpu,
2328 struct kvm_run *kvm_run)
2329{
Avi Kivity1165f5f2007-04-19 17:27:43 +03002330 ++vcpu->stat.irq_exits;
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002331 KVMTRACE_1D(INTR, vcpu, vmcs_read32(VM_EXIT_INTR_INFO), handler);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002332 return 1;
2333}
2334
Avi Kivity988ad742007-02-12 00:54:36 -08002335static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2336{
2337 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
2338 return 0;
2339}
Avi Kivity6aa8b732006-12-10 02:21:36 -08002340
Avi Kivity6aa8b732006-12-10 02:21:36 -08002341static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2342{
He, Qingbfdaab02007-09-12 14:18:28 +08002343 unsigned long exit_qualification;
Avi Kivity039576c2007-03-20 12:46:50 +02002344 int size, down, in, string, rep;
2345 unsigned port;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002346
Avi Kivity1165f5f2007-04-19 17:27:43 +03002347 ++vcpu->stat.io_exits;
He, Qingbfdaab02007-09-12 14:18:28 +08002348 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity039576c2007-03-20 12:46:50 +02002349 string = (exit_qualification & 16) != 0;
Laurent Viviere70669a2007-08-05 10:36:40 +03002350
2351 if (string) {
Laurent Vivier34273182007-09-18 11:27:37 +02002352 if (emulate_instruction(vcpu,
2353 kvm_run, 0, 0, 0) == EMULATE_DO_MMIO)
Laurent Viviere70669a2007-08-05 10:36:40 +03002354 return 0;
2355 return 1;
2356 }
2357
2358 size = (exit_qualification & 7) + 1;
2359 in = (exit_qualification & 8) != 0;
Avi Kivity039576c2007-03-20 12:46:50 +02002360 down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0;
Avi Kivity039576c2007-03-20 12:46:50 +02002361 rep = (exit_qualification & 32) != 0;
2362 port = exit_qualification >> 16;
Laurent Viviere70669a2007-08-05 10:36:40 +03002363
Laurent Vivier3090dd72007-08-05 10:43:32 +03002364 return kvm_emulate_pio(vcpu, kvm_run, in, size, port);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002365}
2366
Ingo Molnar102d8322007-02-19 14:37:47 +02002367static void
2368vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
2369{
2370 /*
2371 * Patch in the VMCALL instruction:
2372 */
2373 hypercall[0] = 0x0f;
2374 hypercall[1] = 0x01;
2375 hypercall[2] = 0xc1;
Ingo Molnar102d8322007-02-19 14:37:47 +02002376}
2377
Avi Kivity6aa8b732006-12-10 02:21:36 -08002378static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2379{
He, Qingbfdaab02007-09-12 14:18:28 +08002380 unsigned long exit_qualification;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002381 int cr;
2382 int reg;
2383
He, Qingbfdaab02007-09-12 14:18:28 +08002384 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002385 cr = exit_qualification & 15;
2386 reg = (exit_qualification >> 8) & 15;
2387 switch ((exit_qualification >> 4) & 3) {
2388 case 0: /* mov to cr */
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002389 KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr, (u32)vcpu->arch.regs[reg],
2390 (u32)((u64)vcpu->arch.regs[reg] >> 32), handler);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002391 switch (cr) {
2392 case 0:
2393 vcpu_load_rsp_rip(vcpu);
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02002394 kvm_set_cr0(vcpu, vcpu->arch.regs[reg]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002395 skip_emulated_instruction(vcpu);
2396 return 1;
2397 case 3:
2398 vcpu_load_rsp_rip(vcpu);
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02002399 kvm_set_cr3(vcpu, vcpu->arch.regs[reg]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002400 skip_emulated_instruction(vcpu);
2401 return 1;
2402 case 4:
2403 vcpu_load_rsp_rip(vcpu);
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02002404 kvm_set_cr4(vcpu, vcpu->arch.regs[reg]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002405 skip_emulated_instruction(vcpu);
2406 return 1;
2407 case 8:
2408 vcpu_load_rsp_rip(vcpu);
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02002409 kvm_set_cr8(vcpu, vcpu->arch.regs[reg]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002410 skip_emulated_instruction(vcpu);
Avi Kivitye5314062007-12-06 16:32:45 +02002411 if (irqchip_in_kernel(vcpu->kvm))
2412 return 1;
Yang, Sheng253abde2007-08-16 13:01:00 +03002413 kvm_run->exit_reason = KVM_EXIT_SET_TPR;
2414 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002415 };
2416 break;
Anthony Liguori25c4c272007-04-27 09:29:21 +03002417 case 2: /* clts */
2418 vcpu_load_rsp_rip(vcpu);
Avi Kivity5fd86fc2007-05-02 20:40:00 +03002419 vmx_fpu_deactivate(vcpu);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002420 vcpu->arch.cr0 &= ~X86_CR0_TS;
2421 vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +03002422 vmx_fpu_activate(vcpu);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002423 KVMTRACE_0D(CLTS, vcpu, handler);
Anthony Liguori25c4c272007-04-27 09:29:21 +03002424 skip_emulated_instruction(vcpu);
2425 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002426 case 1: /*mov from cr*/
2427 switch (cr) {
2428 case 3:
2429 vcpu_load_rsp_rip(vcpu);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002430 vcpu->arch.regs[reg] = vcpu->arch.cr3;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002431 vcpu_put_rsp_rip(vcpu);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002432 KVMTRACE_3D(CR_READ, vcpu, (u32)cr,
2433 (u32)vcpu->arch.regs[reg],
2434 (u32)((u64)vcpu->arch.regs[reg] >> 32),
2435 handler);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002436 skip_emulated_instruction(vcpu);
2437 return 1;
2438 case 8:
Avi Kivity6aa8b732006-12-10 02:21:36 -08002439 vcpu_load_rsp_rip(vcpu);
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02002440 vcpu->arch.regs[reg] = kvm_get_cr8(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002441 vcpu_put_rsp_rip(vcpu);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002442 KVMTRACE_2D(CR_READ, vcpu, (u32)cr,
2443 (u32)vcpu->arch.regs[reg], handler);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002444 skip_emulated_instruction(vcpu);
2445 return 1;
2446 }
2447 break;
2448 case 3: /* lmsw */
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02002449 kvm_lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002450
2451 skip_emulated_instruction(vcpu);
2452 return 1;
2453 default:
2454 break;
2455 }
2456 kvm_run->exit_reason = 0;
Rusty Russellf0242472007-08-01 10:48:02 +10002457 pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
Avi Kivity6aa8b732006-12-10 02:21:36 -08002458 (int)(exit_qualification >> 4) & 3, cr);
2459 return 0;
2460}
2461
2462static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2463{
He, Qingbfdaab02007-09-12 14:18:28 +08002464 unsigned long exit_qualification;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002465 unsigned long val;
2466 int dr, reg;
2467
2468 /*
2469 * FIXME: this code assumes the host is debugging the guest.
2470 * need to deal with guest debugging itself too.
2471 */
He, Qingbfdaab02007-09-12 14:18:28 +08002472 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002473 dr = exit_qualification & 7;
2474 reg = (exit_qualification >> 8) & 15;
2475 vcpu_load_rsp_rip(vcpu);
2476 if (exit_qualification & 16) {
2477 /* mov from dr */
2478 switch (dr) {
2479 case 6:
2480 val = 0xffff0ff0;
2481 break;
2482 case 7:
2483 val = 0x400;
2484 break;
2485 default:
2486 val = 0;
2487 }
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002488 vcpu->arch.regs[reg] = val;
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002489 KVMTRACE_2D(DR_READ, vcpu, (u32)dr, (u32)val, handler);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002490 } else {
2491 /* mov to dr */
2492 }
2493 vcpu_put_rsp_rip(vcpu);
2494 skip_emulated_instruction(vcpu);
2495 return 1;
2496}
2497
2498static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2499{
Avi Kivity06465c52007-02-28 20:46:53 +02002500 kvm_emulate_cpuid(vcpu);
2501 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002502}
2503
2504static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2505{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002506 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
Avi Kivity6aa8b732006-12-10 02:21:36 -08002507 u64 data;
2508
2509 if (vmx_get_msr(vcpu, ecx, &data)) {
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02002510 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002511 return 1;
2512 }
2513
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002514 KVMTRACE_3D(MSR_READ, vcpu, ecx, (u32)data, (u32)(data >> 32),
2515 handler);
2516
Avi Kivity6aa8b732006-12-10 02:21:36 -08002517 /* FIXME: handling of bits 32:63 of rax, rdx */
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002518 vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
2519 vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002520 skip_emulated_instruction(vcpu);
2521 return 1;
2522}
2523
2524static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2525{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002526 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
2527 u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u)
2528 | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002529
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002530 KVMTRACE_3D(MSR_WRITE, vcpu, ecx, (u32)data, (u32)(data >> 32),
2531 handler);
2532
Avi Kivity6aa8b732006-12-10 02:21:36 -08002533 if (vmx_set_msr(vcpu, ecx, data) != 0) {
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02002534 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002535 return 1;
2536 }
2537
2538 skip_emulated_instruction(vcpu);
2539 return 1;
2540}
2541
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002542static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu,
2543 struct kvm_run *kvm_run)
2544{
2545 return 1;
2546}
2547
Avi Kivity6aa8b732006-12-10 02:21:36 -08002548static int handle_interrupt_window(struct kvm_vcpu *vcpu,
2549 struct kvm_run *kvm_run)
2550{
Eddie Dong85f455f2007-07-06 12:20:49 +03002551 u32 cpu_based_vm_exec_control;
2552
2553 /* clear pending irq */
2554 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2555 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
2556 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002557
2558 KVMTRACE_0D(PEND_INTR, vcpu, handler);
2559
Dor Laorc1150d82007-01-05 16:36:24 -08002560 /*
2561 * If the user space waits to inject interrupts, exit as soon as
2562 * possible
2563 */
2564 if (kvm_run->request_interrupt_window &&
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002565 !vcpu->arch.irq_summary) {
Dor Laorc1150d82007-01-05 16:36:24 -08002566 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
Avi Kivity1165f5f2007-04-19 17:27:43 +03002567 ++vcpu->stat.irq_window_exits;
Dor Laorc1150d82007-01-05 16:36:24 -08002568 return 0;
2569 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002570 return 1;
2571}
2572
2573static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2574{
2575 skip_emulated_instruction(vcpu);
Avi Kivityd3bef152007-06-05 15:53:05 +03002576 return kvm_emulate_halt(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002577}
2578
Ingo Molnarc21415e2007-02-19 14:37:47 +02002579static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2580{
Dor Laor510043d2007-02-19 18:25:43 +02002581 skip_emulated_instruction(vcpu);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05002582 kvm_emulate_hypercall(vcpu);
2583 return 1;
Ingo Molnarc21415e2007-02-19 14:37:47 +02002584}
2585
Eddie Donge5edaa02007-11-11 12:28:35 +02002586static int handle_wbinvd(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2587{
2588 skip_emulated_instruction(vcpu);
2589 /* TODO: Add support for VT-d/pass-through device */
2590 return 1;
2591}
2592
Sheng Yangf78e0e22007-10-29 09:40:42 +08002593static int handle_apic_access(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2594{
2595 u64 exit_qualification;
2596 enum emulation_result er;
2597 unsigned long offset;
2598
2599 exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
2600 offset = exit_qualification & 0xffful;
2601
2602 er = emulate_instruction(vcpu, kvm_run, 0, 0, 0);
2603
2604 if (er != EMULATE_DONE) {
2605 printk(KERN_ERR
2606 "Fail to handle apic access vmexit! Offset is 0x%lx\n",
2607 offset);
2608 return -ENOTSUPP;
2609 }
2610 return 1;
2611}
2612
Izik Eidus37817f22008-03-24 23:14:53 +02002613static int handle_task_switch(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2614{
2615 unsigned long exit_qualification;
2616 u16 tss_selector;
2617 int reason;
2618
2619 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
2620
2621 reason = (u32)exit_qualification >> 30;
2622 tss_selector = exit_qualification;
2623
2624 return kvm_task_switch(vcpu, tss_selector, reason);
2625}
2626
Sheng Yang14394422008-04-28 12:24:45 +08002627static int handle_ept_violation(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2628{
2629 u64 exit_qualification;
2630 enum emulation_result er;
2631 gpa_t gpa;
2632 unsigned long hva;
2633 int gla_validity;
2634 int r;
2635
2636 exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
2637
2638 if (exit_qualification & (1 << 6)) {
2639 printk(KERN_ERR "EPT: GPA exceeds GAW!\n");
2640 return -ENOTSUPP;
2641 }
2642
2643 gla_validity = (exit_qualification >> 7) & 0x3;
2644 if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) {
2645 printk(KERN_ERR "EPT: Handling EPT violation failed!\n");
2646 printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
2647 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
2648 (long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS));
2649 printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
2650 (long unsigned int)exit_qualification);
2651 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
2652 kvm_run->hw.hardware_exit_reason = 0;
2653 return -ENOTSUPP;
2654 }
2655
2656 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
2657 hva = gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT);
2658 if (!kvm_is_error_hva(hva)) {
2659 r = kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, 0);
2660 if (r < 0) {
2661 printk(KERN_ERR "EPT: Not enough memory!\n");
2662 return -ENOMEM;
2663 }
2664 return 1;
2665 } else {
2666 /* must be MMIO */
2667 er = emulate_instruction(vcpu, kvm_run, 0, 0, 0);
2668
2669 if (er == EMULATE_FAIL) {
2670 printk(KERN_ERR
2671 "EPT: Fail to handle EPT violation vmexit!er is %d\n",
2672 er);
2673 printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
2674 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
2675 (long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS));
2676 printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
2677 (long unsigned int)exit_qualification);
2678 return -ENOTSUPP;
2679 } else if (er == EMULATE_DO_MMIO)
2680 return 0;
2681 }
2682 return 1;
2683}
2684
Sheng Yangf08864b2008-05-15 18:23:25 +08002685static int handle_nmi_window(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2686{
2687 u32 cpu_based_vm_exec_control;
2688
2689 /* clear pending NMI */
2690 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2691 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
2692 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2693 ++vcpu->stat.nmi_window_exits;
2694
2695 return 1;
2696}
2697
Avi Kivity6aa8b732006-12-10 02:21:36 -08002698/*
2699 * The exit handlers return 1 if the exit was handled fully and guest execution
2700 * may resume. Otherwise they set the kvm_run parameter to indicate what needs
2701 * to be done to userspace and return 0.
2702 */
2703static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu,
2704 struct kvm_run *kvm_run) = {
2705 [EXIT_REASON_EXCEPTION_NMI] = handle_exception,
2706 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
Avi Kivity988ad742007-02-12 00:54:36 -08002707 [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault,
Sheng Yangf08864b2008-05-15 18:23:25 +08002708 [EXIT_REASON_NMI_WINDOW] = handle_nmi_window,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002709 [EXIT_REASON_IO_INSTRUCTION] = handle_io,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002710 [EXIT_REASON_CR_ACCESS] = handle_cr,
2711 [EXIT_REASON_DR_ACCESS] = handle_dr,
2712 [EXIT_REASON_CPUID] = handle_cpuid,
2713 [EXIT_REASON_MSR_READ] = handle_rdmsr,
2714 [EXIT_REASON_MSR_WRITE] = handle_wrmsr,
2715 [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
2716 [EXIT_REASON_HLT] = handle_halt,
Ingo Molnarc21415e2007-02-19 14:37:47 +02002717 [EXIT_REASON_VMCALL] = handle_vmcall,
Sheng Yangf78e0e22007-10-29 09:40:42 +08002718 [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold,
2719 [EXIT_REASON_APIC_ACCESS] = handle_apic_access,
Eddie Donge5edaa02007-11-11 12:28:35 +02002720 [EXIT_REASON_WBINVD] = handle_wbinvd,
Izik Eidus37817f22008-03-24 23:14:53 +02002721 [EXIT_REASON_TASK_SWITCH] = handle_task_switch,
Sheng Yang14394422008-04-28 12:24:45 +08002722 [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002723};
2724
2725static const int kvm_vmx_max_exit_handlers =
Robert P. J. Day50a34852007-06-03 13:35:29 -04002726 ARRAY_SIZE(kvm_vmx_exit_handlers);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002727
2728/*
2729 * The guest has exited. See if we can fix it or if we need userspace
2730 * assistance.
2731 */
2732static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
2733{
Avi Kivity6aa8b732006-12-10 02:21:36 -08002734 u32 exit_reason = vmcs_read32(VM_EXIT_REASON);
Avi Kivity29bd8a72007-09-10 17:27:03 +03002735 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity1155f762007-11-22 11:30:47 +02002736 u32 vectoring_info = vmx->idt_vectoring_info;
Avi Kivity29bd8a72007-09-10 17:27:03 +03002737
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002738 KVMTRACE_3D(VMEXIT, vcpu, exit_reason, (u32)vmcs_readl(GUEST_RIP),
2739 (u32)((u64)vmcs_readl(GUEST_RIP) >> 32), entryexit);
2740
Sheng Yang14394422008-04-28 12:24:45 +08002741 /* Access CR3 don't cause VMExit in paging mode, so we need
2742 * to sync with guest real CR3. */
2743 if (vm_need_ept() && is_paging(vcpu)) {
2744 vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
2745 ept_load_pdptrs(vcpu);
2746 }
2747
Avi Kivity29bd8a72007-09-10 17:27:03 +03002748 if (unlikely(vmx->fail)) {
2749 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
2750 kvm_run->fail_entry.hardware_entry_failure_reason
2751 = vmcs_read32(VM_INSTRUCTION_ERROR);
2752 return 0;
2753 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002754
Mike Dayd77c26f2007-10-08 09:02:08 -04002755 if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
Sheng Yang14394422008-04-28 12:24:45 +08002756 (exit_reason != EXIT_REASON_EXCEPTION_NMI &&
2757 exit_reason != EXIT_REASON_EPT_VIOLATION))
Avi Kivity6aa8b732006-12-10 02:21:36 -08002758 printk(KERN_WARNING "%s: unexpected, valid vectoring info and "
Harvey Harrisonb8688d52008-03-03 12:59:56 -08002759 "exit reason is 0x%x\n", __func__, exit_reason);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002760 if (exit_reason < kvm_vmx_max_exit_handlers
2761 && kvm_vmx_exit_handlers[exit_reason])
2762 return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run);
2763 else {
2764 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
2765 kvm_run->hw.hardware_exit_reason = exit_reason;
2766 }
2767 return 0;
2768}
2769
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002770static void update_tpr_threshold(struct kvm_vcpu *vcpu)
2771{
2772 int max_irr, tpr;
2773
2774 if (!vm_need_tpr_shadow(vcpu->kvm))
2775 return;
2776
2777 if (!kvm_lapic_enabled(vcpu) ||
2778 ((max_irr = kvm_lapic_find_highest_irr(vcpu)) == -1)) {
2779 vmcs_write32(TPR_THRESHOLD, 0);
2780 return;
2781 }
2782
2783 tpr = (kvm_lapic_get_cr8(vcpu) & 0x0f) << 4;
2784 vmcs_write32(TPR_THRESHOLD, (max_irr > tpr) ? tpr >> 4 : max_irr >> 4);
2785}
2786
Eddie Dong85f455f2007-07-06 12:20:49 +03002787static void enable_irq_window(struct kvm_vcpu *vcpu)
2788{
2789 u32 cpu_based_vm_exec_control;
2790
2791 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2792 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
2793 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2794}
2795
Sheng Yangf08864b2008-05-15 18:23:25 +08002796static void enable_nmi_window(struct kvm_vcpu *vcpu)
2797{
2798 u32 cpu_based_vm_exec_control;
2799
2800 if (!cpu_has_virtual_nmis())
2801 return;
2802
2803 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2804 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
2805 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2806}
2807
2808static int vmx_nmi_enabled(struct kvm_vcpu *vcpu)
2809{
2810 u32 guest_intr = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
2811 return !(guest_intr & (GUEST_INTR_STATE_NMI |
2812 GUEST_INTR_STATE_MOV_SS |
2813 GUEST_INTR_STATE_STI));
2814}
2815
2816static int vmx_irq_enabled(struct kvm_vcpu *vcpu)
2817{
2818 u32 guest_intr = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
2819 return (!(guest_intr & (GUEST_INTR_STATE_MOV_SS |
2820 GUEST_INTR_STATE_STI)) &&
2821 (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF));
2822}
2823
2824static void enable_intr_window(struct kvm_vcpu *vcpu)
2825{
2826 if (vcpu->arch.nmi_pending)
2827 enable_nmi_window(vcpu);
2828 else if (kvm_cpu_has_interrupt(vcpu))
2829 enable_irq_window(vcpu);
2830}
2831
Eddie Dong85f455f2007-07-06 12:20:49 +03002832static void vmx_intr_assist(struct kvm_vcpu *vcpu)
2833{
Avi Kivity1155f762007-11-22 11:30:47 +02002834 struct vcpu_vmx *vmx = to_vmx(vcpu);
Sheng Yangf08864b2008-05-15 18:23:25 +08002835 u32 idtv_info_field, intr_info_field, exit_intr_info_field;
Eddie Dong1b9778d2007-09-03 16:56:58 +03002836 int vector;
Eddie Dong85f455f2007-07-06 12:20:49 +03002837
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002838 update_tpr_threshold(vcpu);
2839
Eddie Dong85f455f2007-07-06 12:20:49 +03002840 intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD);
Sheng Yangf08864b2008-05-15 18:23:25 +08002841 exit_intr_info_field = vmcs_read32(VM_EXIT_INTR_INFO);
Avi Kivity1155f762007-11-22 11:30:47 +02002842 idtv_info_field = vmx->idt_vectoring_info;
Eddie Dong85f455f2007-07-06 12:20:49 +03002843 if (intr_info_field & INTR_INFO_VALID_MASK) {
2844 if (idtv_info_field & INTR_INFO_VALID_MASK) {
2845 /* TODO: fault when IDT_Vectoring */
Ryan Harper9584bf22007-12-13 10:21:10 -06002846 if (printk_ratelimit())
2847 printk(KERN_ERR "Fault when IDT_Vectoring\n");
Eddie Dong85f455f2007-07-06 12:20:49 +03002848 }
Sheng Yangf08864b2008-05-15 18:23:25 +08002849 enable_intr_window(vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03002850 return;
2851 }
2852 if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) {
Avi Kivity9c8cba32007-11-22 11:42:59 +02002853 if ((idtv_info_field & VECTORING_INFO_TYPE_MASK)
2854 == INTR_TYPE_EXT_INTR
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002855 && vcpu->arch.rmode.active) {
Avi Kivity9c8cba32007-11-22 11:42:59 +02002856 u8 vect = idtv_info_field & VECTORING_INFO_VECTOR_MASK;
2857
2858 vmx_inject_irq(vcpu, vect);
Sheng Yangf08864b2008-05-15 18:23:25 +08002859 enable_intr_window(vcpu);
Avi Kivity9c8cba32007-11-22 11:42:59 +02002860 return;
2861 }
2862
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002863 KVMTRACE_1D(REDELIVER_EVT, vcpu, idtv_info_field, handler);
2864
Sheng Yangf08864b2008-05-15 18:23:25 +08002865 /*
2866 * SDM 3: 25.7.1.2
2867 * Clear bit "block by NMI" before VM entry if a NMI delivery
2868 * faulted.
2869 */
2870 if ((idtv_info_field & VECTORING_INFO_TYPE_MASK)
2871 == INTR_TYPE_NMI_INTR && cpu_has_virtual_nmis())
2872 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
2873 vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
2874 ~GUEST_INTR_STATE_NMI);
2875
2876 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field
2877 & ~INTR_INFO_RESVD_BITS_MASK);
Eddie Dong85f455f2007-07-06 12:20:49 +03002878 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
2879 vmcs_read32(VM_EXIT_INSTRUCTION_LEN));
2880
Ryan Harper2e113842008-02-11 10:26:38 -06002881 if (unlikely(idtv_info_field & INTR_INFO_DELIVER_CODE_MASK))
Eddie Dong85f455f2007-07-06 12:20:49 +03002882 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE,
2883 vmcs_read32(IDT_VECTORING_ERROR_CODE));
Sheng Yangf08864b2008-05-15 18:23:25 +08002884 enable_intr_window(vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03002885 return;
2886 }
Sheng Yangf08864b2008-05-15 18:23:25 +08002887 if (cpu_has_virtual_nmis()) {
2888 /*
2889 * SDM 3: 25.7.1.2
2890 * Re-set bit "block by NMI" before VM entry if vmexit caused by
2891 * a guest IRET fault.
2892 */
2893 if ((exit_intr_info_field & INTR_INFO_UNBLOCK_NMI) &&
2894 (exit_intr_info_field & INTR_INFO_VECTOR_MASK) != 8)
2895 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
2896 vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) |
2897 GUEST_INTR_STATE_NMI);
2898 else if (vcpu->arch.nmi_pending) {
2899 if (vmx_nmi_enabled(vcpu))
2900 vmx_inject_nmi(vcpu);
2901 enable_intr_window(vcpu);
2902 return;
2903 }
2904
2905 }
2906 if (!kvm_cpu_has_interrupt(vcpu))
Eddie Dong85f455f2007-07-06 12:20:49 +03002907 return;
Sheng Yangf08864b2008-05-15 18:23:25 +08002908 if (vmx_irq_enabled(vcpu)) {
Eddie Dong1b9778d2007-09-03 16:56:58 +03002909 vector = kvm_cpu_get_interrupt(vcpu);
2910 vmx_inject_irq(vcpu, vector);
2911 kvm_timer_intr_post(vcpu, vector);
2912 } else
Eddie Dong85f455f2007-07-06 12:20:49 +03002913 enable_irq_window(vcpu);
2914}
2915
Avi Kivity9c8cba32007-11-22 11:42:59 +02002916/*
2917 * Failure to inject an interrupt should give us the information
2918 * in IDT_VECTORING_INFO_FIELD. However, if the failure occurs
2919 * when fetching the interrupt redirection bitmap in the real-mode
2920 * tss, this doesn't happen. So we do it ourselves.
2921 */
2922static void fixup_rmode_irq(struct vcpu_vmx *vmx)
2923{
2924 vmx->rmode.irq.pending = 0;
2925 if (vmcs_readl(GUEST_RIP) + 1 != vmx->rmode.irq.rip)
2926 return;
2927 vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip);
2928 if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) {
2929 vmx->idt_vectoring_info &= ~VECTORING_INFO_TYPE_MASK;
2930 vmx->idt_vectoring_info |= INTR_TYPE_EXT_INTR;
2931 return;
2932 }
2933 vmx->idt_vectoring_info =
2934 VECTORING_INFO_VALID_MASK
2935 | INTR_TYPE_EXT_INTR
2936 | vmx->rmode.irq.vector;
2937}
2938
Avi Kivity04d2cc72007-09-10 18:10:54 +03002939static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002940{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002941 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity1b6269d2007-10-09 12:12:19 +02002942 u32 intr_info;
Avi Kivitye6adf282007-04-30 16:07:54 +03002943
2944 /*
2945 * Loading guest fpu may have cleared host cr0.ts
2946 */
2947 vmcs_writel(HOST_CR0, read_cr0());
2948
Mike Dayd77c26f2007-10-08 09:02:08 -04002949 asm(
Avi Kivity6aa8b732006-12-10 02:21:36 -08002950 /* Store host registers */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002951#ifdef CONFIG_X86_64
Laurent Vivierc2036302007-10-25 14:18:52 +02002952 "push %%rdx; push %%rbp;"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002953 "push %%rcx \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002954#else
Laurent Vivierff593e52007-10-25 14:18:55 +02002955 "push %%edx; push %%ebp;"
2956 "push %%ecx \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002957#endif
Avi Kivity4ecac3f2008-05-13 13:23:38 +03002958 __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002959 /* Check if vmlaunch of vmresume is needed */
Avi Kivitye08aa782007-11-15 18:06:18 +02002960 "cmpl $0, %c[launched](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002961 /* Load guest registers. Don't clobber flags. */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002962#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02002963 "mov %c[cr2](%0), %%rax \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002964 "mov %%rax, %%cr2 \n\t"
Avi Kivitye08aa782007-11-15 18:06:18 +02002965 "mov %c[rax](%0), %%rax \n\t"
2966 "mov %c[rbx](%0), %%rbx \n\t"
2967 "mov %c[rdx](%0), %%rdx \n\t"
2968 "mov %c[rsi](%0), %%rsi \n\t"
2969 "mov %c[rdi](%0), %%rdi \n\t"
2970 "mov %c[rbp](%0), %%rbp \n\t"
2971 "mov %c[r8](%0), %%r8 \n\t"
2972 "mov %c[r9](%0), %%r9 \n\t"
2973 "mov %c[r10](%0), %%r10 \n\t"
2974 "mov %c[r11](%0), %%r11 \n\t"
2975 "mov %c[r12](%0), %%r12 \n\t"
2976 "mov %c[r13](%0), %%r13 \n\t"
2977 "mov %c[r14](%0), %%r14 \n\t"
2978 "mov %c[r15](%0), %%r15 \n\t"
2979 "mov %c[rcx](%0), %%rcx \n\t" /* kills %0 (rcx) */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002980#else
Avi Kivitye08aa782007-11-15 18:06:18 +02002981 "mov %c[cr2](%0), %%eax \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002982 "mov %%eax, %%cr2 \n\t"
Avi Kivitye08aa782007-11-15 18:06:18 +02002983 "mov %c[rax](%0), %%eax \n\t"
2984 "mov %c[rbx](%0), %%ebx \n\t"
2985 "mov %c[rdx](%0), %%edx \n\t"
2986 "mov %c[rsi](%0), %%esi \n\t"
2987 "mov %c[rdi](%0), %%edi \n\t"
2988 "mov %c[rbp](%0), %%ebp \n\t"
2989 "mov %c[rcx](%0), %%ecx \n\t" /* kills %0 (ecx) */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002990#endif
2991 /* Enter guest mode */
Avi Kivitycd2276a2007-05-14 20:41:13 +03002992 "jne .Llaunched \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03002993 __ex(ASM_VMX_VMLAUNCH) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03002994 "jmp .Lkvm_vmx_return \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03002995 ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03002996 ".Lkvm_vmx_return: "
Avi Kivity6aa8b732006-12-10 02:21:36 -08002997 /* Save guest registers, load host registers, keep flags */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002998#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02002999 "xchg %0, (%%rsp) \n\t"
3000 "mov %%rax, %c[rax](%0) \n\t"
3001 "mov %%rbx, %c[rbx](%0) \n\t"
3002 "pushq (%%rsp); popq %c[rcx](%0) \n\t"
3003 "mov %%rdx, %c[rdx](%0) \n\t"
3004 "mov %%rsi, %c[rsi](%0) \n\t"
3005 "mov %%rdi, %c[rdi](%0) \n\t"
3006 "mov %%rbp, %c[rbp](%0) \n\t"
3007 "mov %%r8, %c[r8](%0) \n\t"
3008 "mov %%r9, %c[r9](%0) \n\t"
3009 "mov %%r10, %c[r10](%0) \n\t"
3010 "mov %%r11, %c[r11](%0) \n\t"
3011 "mov %%r12, %c[r12](%0) \n\t"
3012 "mov %%r13, %c[r13](%0) \n\t"
3013 "mov %%r14, %c[r14](%0) \n\t"
3014 "mov %%r15, %c[r15](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003015 "mov %%cr2, %%rax \n\t"
Avi Kivitye08aa782007-11-15 18:06:18 +02003016 "mov %%rax, %c[cr2](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003017
Avi Kivitye08aa782007-11-15 18:06:18 +02003018 "pop %%rbp; pop %%rbp; pop %%rdx \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003019#else
Avi Kivitye08aa782007-11-15 18:06:18 +02003020 "xchg %0, (%%esp) \n\t"
3021 "mov %%eax, %c[rax](%0) \n\t"
3022 "mov %%ebx, %c[rbx](%0) \n\t"
3023 "pushl (%%esp); popl %c[rcx](%0) \n\t"
3024 "mov %%edx, %c[rdx](%0) \n\t"
3025 "mov %%esi, %c[rsi](%0) \n\t"
3026 "mov %%edi, %c[rdi](%0) \n\t"
3027 "mov %%ebp, %c[rbp](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003028 "mov %%cr2, %%eax \n\t"
Avi Kivitye08aa782007-11-15 18:06:18 +02003029 "mov %%eax, %c[cr2](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003030
Avi Kivitye08aa782007-11-15 18:06:18 +02003031 "pop %%ebp; pop %%ebp; pop %%edx \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003032#endif
Avi Kivitye08aa782007-11-15 18:06:18 +02003033 "setbe %c[fail](%0) \n\t"
3034 : : "c"(vmx), "d"((unsigned long)HOST_RSP),
3035 [launched]"i"(offsetof(struct vcpu_vmx, launched)),
3036 [fail]"i"(offsetof(struct vcpu_vmx, fail)),
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003037 [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])),
3038 [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])),
3039 [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])),
3040 [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])),
3041 [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])),
3042 [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])),
3043 [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])),
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003044#ifdef CONFIG_X86_64
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003045 [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])),
3046 [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])),
3047 [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])),
3048 [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])),
3049 [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])),
3050 [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])),
3051 [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])),
3052 [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])),
Avi Kivity6aa8b732006-12-10 02:21:36 -08003053#endif
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003054 [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2))
Laurent Vivierc2036302007-10-25 14:18:52 +02003055 : "cc", "memory"
3056#ifdef CONFIG_X86_64
3057 , "rbx", "rdi", "rsi"
3058 , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
Laurent Vivierff593e52007-10-25 14:18:55 +02003059#else
3060 , "ebx", "edi", "rsi"
Laurent Vivierc2036302007-10-25 14:18:52 +02003061#endif
3062 );
Avi Kivity6aa8b732006-12-10 02:21:36 -08003063
Avi Kivity1155f762007-11-22 11:30:47 +02003064 vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
Avi Kivity9c8cba32007-11-22 11:42:59 +02003065 if (vmx->rmode.irq.pending)
3066 fixup_rmode_irq(vmx);
Avi Kivity1155f762007-11-22 11:30:47 +02003067
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003068 vcpu->arch.interrupt_window_open =
Sheng Yangf08864b2008-05-15 18:23:25 +08003069 (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
3070 (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)) == 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003071
Mike Dayd77c26f2007-10-08 09:02:08 -04003072 asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
Avi Kivity15ad7142007-07-11 18:17:21 +03003073 vmx->launched = 1;
Avi Kivity1b6269d2007-10-09 12:12:19 +02003074
3075 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
3076
3077 /* We need to handle NMIs before interrupts are enabled */
Sheng Yangf08864b2008-05-15 18:23:25 +08003078 if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200 &&
3079 (intr_info & INTR_INFO_VALID_MASK)) {
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003080 KVMTRACE_0D(NMI, vcpu, handler);
Avi Kivity1b6269d2007-10-09 12:12:19 +02003081 asm("int $2");
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003082 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003083}
3084
Avi Kivity6aa8b732006-12-10 02:21:36 -08003085static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
3086{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003087 struct vcpu_vmx *vmx = to_vmx(vcpu);
3088
3089 if (vmx->vmcs) {
Avi Kivity543e4242008-05-13 16:22:47 +03003090 vcpu_clear(vmx);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003091 free_vmcs(vmx->vmcs);
3092 vmx->vmcs = NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003093 }
3094}
3095
3096static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
3097{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003098 struct vcpu_vmx *vmx = to_vmx(vcpu);
3099
Sheng Yang2384d2b2008-01-17 15:14:33 +08003100 spin_lock(&vmx_vpid_lock);
3101 if (vmx->vpid != 0)
3102 __clear_bit(vmx->vpid, vmx_vpid_bitmap);
3103 spin_unlock(&vmx_vpid_lock);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003104 vmx_free_vmcs(vcpu);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003105 kfree(vmx->host_msrs);
3106 kfree(vmx->guest_msrs);
3107 kvm_vcpu_uninit(vcpu);
Rusty Russella4770342007-08-01 14:46:11 +10003108 kmem_cache_free(kvm_vcpu_cache, vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003109}
3110
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003111static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003112{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003113 int err;
Rusty Russellc16f8622007-07-30 21:12:19 +10003114 struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
Avi Kivity15ad7142007-07-11 18:17:21 +03003115 int cpu;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003116
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003117 if (!vmx)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003118 return ERR_PTR(-ENOMEM);
3119
Sheng Yang2384d2b2008-01-17 15:14:33 +08003120 allocate_vpid(vmx);
3121
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003122 err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
3123 if (err)
3124 goto free_vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08003125
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003126 vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003127 if (!vmx->guest_msrs) {
3128 err = -ENOMEM;
3129 goto uninit_vcpu;
3130 }
Ingo Molnar965b58a2007-01-05 16:36:23 -08003131
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003132 vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
3133 if (!vmx->host_msrs)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003134 goto free_guest_msrs;
Ingo Molnar965b58a2007-01-05 16:36:23 -08003135
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003136 vmx->vmcs = alloc_vmcs();
3137 if (!vmx->vmcs)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003138 goto free_msrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003139
3140 vmcs_clear(vmx->vmcs);
3141
Avi Kivity15ad7142007-07-11 18:17:21 +03003142 cpu = get_cpu();
3143 vmx_vcpu_load(&vmx->vcpu, cpu);
Rusty Russell8b9cf982007-07-30 16:31:43 +10003144 err = vmx_vcpu_setup(vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003145 vmx_vcpu_put(&vmx->vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03003146 put_cpu();
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003147 if (err)
3148 goto free_vmcs;
Marcelo Tosatti5e4a0b32008-02-14 21:21:43 -02003149 if (vm_need_virtualize_apic_accesses(kvm))
3150 if (alloc_apic_access_page(kvm) != 0)
3151 goto free_vmcs;
Ingo Molnar965b58a2007-01-05 16:36:23 -08003152
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003153 if (vm_need_ept())
3154 if (alloc_identity_pagetable(kvm) != 0)
3155 goto free_vmcs;
3156
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003157 return &vmx->vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08003158
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003159free_vmcs:
3160 free_vmcs(vmx->vmcs);
3161free_msrs:
3162 kfree(vmx->host_msrs);
3163free_guest_msrs:
3164 kfree(vmx->guest_msrs);
3165uninit_vcpu:
3166 kvm_vcpu_uninit(&vmx->vcpu);
3167free_vcpu:
Rusty Russella4770342007-08-01 14:46:11 +10003168 kmem_cache_free(kvm_vcpu_cache, vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003169 return ERR_PTR(err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003170}
3171
Yang, Sheng002c7f72007-07-31 14:23:01 +03003172static void __init vmx_check_processor_compat(void *rtn)
3173{
3174 struct vmcs_config vmcs_conf;
3175
3176 *(int *)rtn = 0;
3177 if (setup_vmcs_config(&vmcs_conf) < 0)
3178 *(int *)rtn = -EIO;
3179 if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
3180 printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
3181 smp_processor_id());
3182 *(int *)rtn = -EIO;
3183 }
3184}
3185
Sheng Yang67253af2008-04-25 10:20:22 +08003186static int get_ept_level(void)
3187{
3188 return VMX_EPT_DEFAULT_GAW + 1;
3189}
3190
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +03003191static struct kvm_x86_ops vmx_x86_ops = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08003192 .cpu_has_kvm_support = cpu_has_kvm_support,
3193 .disabled_by_bios = vmx_disabled_by_bios,
3194 .hardware_setup = hardware_setup,
3195 .hardware_unsetup = hardware_unsetup,
Yang, Sheng002c7f72007-07-31 14:23:01 +03003196 .check_processor_compatibility = vmx_check_processor_compat,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003197 .hardware_enable = hardware_enable,
3198 .hardware_disable = hardware_disable,
Avi Kivity774ead32007-12-26 13:57:04 +02003199 .cpu_has_accelerated_tpr = cpu_has_vmx_virtualize_apic_accesses,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003200
3201 .vcpu_create = vmx_create_vcpu,
3202 .vcpu_free = vmx_free_vcpu,
Avi Kivity04d2cc72007-09-10 18:10:54 +03003203 .vcpu_reset = vmx_vcpu_reset,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003204
Avi Kivity04d2cc72007-09-10 18:10:54 +03003205 .prepare_guest_switch = vmx_save_host_state,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003206 .vcpu_load = vmx_vcpu_load,
3207 .vcpu_put = vmx_vcpu_put,
3208
3209 .set_guest_debug = set_guest_debug,
Avi Kivity04d2cc72007-09-10 18:10:54 +03003210 .guest_debug_pre = kvm_guest_debug_pre,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003211 .get_msr = vmx_get_msr,
3212 .set_msr = vmx_set_msr,
3213 .get_segment_base = vmx_get_segment_base,
3214 .get_segment = vmx_get_segment,
3215 .set_segment = vmx_set_segment,
Izik Eidus2e4d2652008-03-24 19:38:34 +02003216 .get_cpl = vmx_get_cpl,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003217 .get_cs_db_l_bits = vmx_get_cs_db_l_bits,
Anthony Liguori25c4c272007-04-27 09:29:21 +03003218 .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003219 .set_cr0 = vmx_set_cr0,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003220 .set_cr3 = vmx_set_cr3,
3221 .set_cr4 = vmx_set_cr4,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003222 .set_efer = vmx_set_efer,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003223 .get_idt = vmx_get_idt,
3224 .set_idt = vmx_set_idt,
3225 .get_gdt = vmx_get_gdt,
3226 .set_gdt = vmx_set_gdt,
3227 .cache_regs = vcpu_load_rsp_rip,
3228 .decache_regs = vcpu_put_rsp_rip,
3229 .get_rflags = vmx_get_rflags,
3230 .set_rflags = vmx_set_rflags,
3231
3232 .tlb_flush = vmx_flush_tlb,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003233
Avi Kivity6aa8b732006-12-10 02:21:36 -08003234 .run = vmx_vcpu_run,
Avi Kivity04d2cc72007-09-10 18:10:54 +03003235 .handle_exit = kvm_handle_exit,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003236 .skip_emulated_instruction = skip_emulated_instruction,
Ingo Molnar102d8322007-02-19 14:37:47 +02003237 .patch_hypercall = vmx_patch_hypercall,
Eddie Dong2a8067f2007-08-06 16:29:07 +03003238 .get_irq = vmx_get_irq,
3239 .set_irq = vmx_inject_irq,
Avi Kivity298101d2007-11-25 13:41:11 +02003240 .queue_exception = vmx_queue_exception,
3241 .exception_injected = vmx_exception_injected,
Avi Kivity04d2cc72007-09-10 18:10:54 +03003242 .inject_pending_irq = vmx_intr_assist,
3243 .inject_pending_vectors = do_interrupt_requests,
Izik Eiduscbc94022007-10-25 00:29:55 +02003244
3245 .set_tss_addr = vmx_set_tss_addr,
Sheng Yang67253af2008-04-25 10:20:22 +08003246 .get_tdp_level = get_ept_level,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003247};
3248
3249static int __init vmx_init(void)
3250{
Sheng Yang25c5f222008-03-28 13:18:56 +08003251 void *va;
He, Qingfdef3ad2007-04-30 09:45:24 +03003252 int r;
3253
3254 vmx_io_bitmap_a = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
3255 if (!vmx_io_bitmap_a)
3256 return -ENOMEM;
3257
3258 vmx_io_bitmap_b = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
3259 if (!vmx_io_bitmap_b) {
3260 r = -ENOMEM;
3261 goto out;
3262 }
3263
Sheng Yang25c5f222008-03-28 13:18:56 +08003264 vmx_msr_bitmap = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
3265 if (!vmx_msr_bitmap) {
3266 r = -ENOMEM;
3267 goto out1;
3268 }
3269
He, Qingfdef3ad2007-04-30 09:45:24 +03003270 /*
3271 * Allow direct access to the PC debug port (it is often used for I/O
3272 * delays, but the vmexits simply slow things down).
3273 */
Sheng Yang25c5f222008-03-28 13:18:56 +08003274 va = kmap(vmx_io_bitmap_a);
3275 memset(va, 0xff, PAGE_SIZE);
3276 clear_bit(0x80, va);
Avi Kivitycd0536d2007-05-08 11:34:07 +03003277 kunmap(vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03003278
Sheng Yang25c5f222008-03-28 13:18:56 +08003279 va = kmap(vmx_io_bitmap_b);
3280 memset(va, 0xff, PAGE_SIZE);
Avi Kivitycd0536d2007-05-08 11:34:07 +03003281 kunmap(vmx_io_bitmap_b);
He, Qingfdef3ad2007-04-30 09:45:24 +03003282
Sheng Yang25c5f222008-03-28 13:18:56 +08003283 va = kmap(vmx_msr_bitmap);
3284 memset(va, 0xff, PAGE_SIZE);
3285 kunmap(vmx_msr_bitmap);
3286
Sheng Yang2384d2b2008-01-17 15:14:33 +08003287 set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
3288
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08003289 r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE);
He, Qingfdef3ad2007-04-30 09:45:24 +03003290 if (r)
Sheng Yang25c5f222008-03-28 13:18:56 +08003291 goto out2;
3292
3293 vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_FS_BASE);
3294 vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_GS_BASE);
3295 vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_CS);
3296 vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_ESP);
3297 vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_EIP);
He, Qingfdef3ad2007-04-30 09:45:24 +03003298
Sheng Yang5fdbcb92008-07-16 09:25:40 +08003299 if (vm_need_ept()) {
Sheng Yang14394422008-04-28 12:24:45 +08003300 bypass_guest_pf = 0;
Sheng Yang5fdbcb92008-07-16 09:25:40 +08003301 kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
3302 VMX_EPT_WRITABLE_MASK |
3303 VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
Sheng Yang534e38b2008-09-08 15:12:30 +08003304 kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
Sheng Yang5fdbcb92008-07-16 09:25:40 +08003305 VMX_EPT_EXECUTABLE_MASK);
3306 kvm_enable_tdp();
3307 } else
3308 kvm_disable_tdp();
Sheng Yang14394422008-04-28 12:24:45 +08003309
Avi Kivityc7addb92007-09-16 18:58:32 +02003310 if (bypass_guest_pf)
3311 kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);
3312
Sheng Yang14394422008-04-28 12:24:45 +08003313 ept_sync_global();
3314
He, Qingfdef3ad2007-04-30 09:45:24 +03003315 return 0;
3316
Sheng Yang25c5f222008-03-28 13:18:56 +08003317out2:
3318 __free_page(vmx_msr_bitmap);
He, Qingfdef3ad2007-04-30 09:45:24 +03003319out1:
3320 __free_page(vmx_io_bitmap_b);
3321out:
3322 __free_page(vmx_io_bitmap_a);
3323 return r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003324}
3325
3326static void __exit vmx_exit(void)
3327{
Sheng Yang25c5f222008-03-28 13:18:56 +08003328 __free_page(vmx_msr_bitmap);
He, Qingfdef3ad2007-04-30 09:45:24 +03003329 __free_page(vmx_io_bitmap_b);
3330 __free_page(vmx_io_bitmap_a);
3331
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08003332 kvm_exit();
Avi Kivity6aa8b732006-12-10 02:21:36 -08003333}
3334
3335module_init(vmx_init)
3336module_exit(vmx_exit)