blob: 907af3f3a7af277b24388c13fbaaecdc571810fa [file] [log] [blame]
Avi Kivity6aa8b732006-12-10 02:21:36 -08001/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * AMD SVM support
5 *
6 * Copyright (C) 2006 Qumranet, Inc.
7 *
8 * Authors:
9 * Yaniv Kamay <yaniv@qumranet.com>
10 * Avi Kivity <avi@qumranet.com>
11 *
12 * This work is licensed under the terms of the GNU GPL, version 2. See
13 * the COPYING file in the top-level directory.
14 *
15 */
Avi Kivityedf88412007-12-16 11:02:48 +020016#include <linux/kvm_host.h>
17
Eddie Dong85f455f2007-07-06 12:20:49 +030018#include "irq.h"
Zhang Xiantao1d737c82007-12-14 09:35:10 +080019#include "mmu.h"
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030020#include "kvm_cache_regs.h"
Gleb Natapovfe4c7b12009-03-23 11:23:18 +020021#include "x86.h"
Avi Kivitye4956062007-06-28 14:15:57 -040022
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/vmalloc.h>
26#include <linux/highmem.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040027#include <linux/sched.h>
Marcelo Tosatti229456f2009-06-17 09:22:14 -030028#include <linux/ftrace_event.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080029
Avi Kivitye4956062007-06-28 14:15:57 -040030#include <asm/desc.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080031
Eduardo Habkost63d11422008-11-17 19:03:20 -020032#include <asm/virtext.h>
Marcelo Tosatti229456f2009-06-17 09:22:14 -030033#include "trace.h"
Eduardo Habkost63d11422008-11-17 19:03:20 -020034
Avi Kivity4ecac3f2008-05-13 13:23:38 +030035#define __ex(x) __kvm_handle_fault_on_reboot(x)
36
Avi Kivity6aa8b732006-12-10 02:21:36 -080037MODULE_AUTHOR("Qumranet");
38MODULE_LICENSE("GPL");
39
40#define IOPM_ALLOC_ORDER 2
41#define MSRPM_ALLOC_ORDER 1
42
Avi Kivity6aa8b732006-12-10 02:21:36 -080043#define SEG_TYPE_LDT 2
44#define SEG_TYPE_BUSY_TSS16 3
45
Joerg Roedel80b77062007-03-30 17:02:14 +030046#define SVM_FEATURE_NPT (1 << 0)
47#define SVM_FEATURE_LBRV (1 << 1)
Amit Shah94c935a12008-08-18 13:11:46 +030048#define SVM_FEATURE_SVML (1 << 2)
Joerg Roedel80b77062007-03-30 17:02:14 +030049
Joerg Roedel410e4d52009-08-07 11:49:44 +020050#define NESTED_EXIT_HOST 0 /* Exit handled on host level */
51#define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */
52#define NESTED_EXIT_CONTINUE 2 /* Further checks needed */
53
Joerg Roedel24e09cb2008-02-13 18:58:47 +010054#define DEBUGCTL_RESERVED_BITS (~(0x3fULL))
55
Alexander Grafc0725422008-11-25 20:17:03 +010056/* Turn on to get debugging output*/
57/* #define NESTED_DEBUG */
58
59#ifdef NESTED_DEBUG
60#define nsvm_printk(fmt, args...) printk(KERN_INFO fmt, ## args)
61#else
62#define nsvm_printk(fmt, args...) do {} while(0)
63#endif
64
Avi Kivity6c8166a2009-05-31 18:15:37 +030065static const u32 host_save_user_msrs[] = {
66#ifdef CONFIG_X86_64
67 MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE,
68 MSR_FS_BASE,
69#endif
70 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
71};
72
73#define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)
74
75struct kvm_vcpu;
76
Joerg Roedele6aa9ab2009-08-07 11:49:33 +020077struct nested_state {
78 struct vmcb *hsave;
79 u64 hsave_msr;
80 u64 vmcb;
81
82 /* These are the merged vectors */
83 u32 *msrpm;
84
85 /* gpa pointers to the real vectors */
86 u64 vmcb_msrpm;
Joerg Roedelaad42c62009-08-07 11:49:34 +020087
Joerg Roedelcd3ff652009-10-09 16:08:26 +020088 /* A VMEXIT is required but not yet emulated */
89 bool exit_required;
90
Joerg Roedelaad42c62009-08-07 11:49:34 +020091 /* cache for intercepts of the guest */
92 u16 intercept_cr_read;
93 u16 intercept_cr_write;
94 u16 intercept_dr_read;
95 u16 intercept_dr_write;
96 u32 intercept_exceptions;
97 u64 intercept;
98
Joerg Roedele6aa9ab2009-08-07 11:49:33 +020099};
100
Avi Kivity6c8166a2009-05-31 18:15:37 +0300101struct vcpu_svm {
102 struct kvm_vcpu vcpu;
103 struct vmcb *vmcb;
104 unsigned long vmcb_pa;
105 struct svm_cpu_data *svm_data;
106 uint64_t asid_generation;
107 uint64_t sysenter_esp;
108 uint64_t sysenter_eip;
109
110 u64 next_rip;
111
112 u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS];
113 u64 host_gs_base;
Avi Kivity6c8166a2009-05-31 18:15:37 +0300114
115 u32 *msrpm;
Avi Kivity6c8166a2009-05-31 18:15:37 +0300116
Joerg Roedele6aa9ab2009-08-07 11:49:33 +0200117 struct nested_state nested;
Avi Kivity6c8166a2009-05-31 18:15:37 +0300118};
119
Joerg Roedel709ddeb2008-02-07 13:47:45 +0100120/* enable NPT for AMD64 and X86 with PAE */
121#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
122static bool npt_enabled = true;
123#else
Joerg Roedele3da3ac2008-02-07 13:47:39 +0100124static bool npt_enabled = false;
Joerg Roedel709ddeb2008-02-07 13:47:45 +0100125#endif
Joerg Roedel6c7dac72008-02-07 13:47:40 +0100126static int npt = 1;
127
128module_param(npt, int, S_IRUGO);
Joerg Roedele3da3ac2008-02-07 13:47:39 +0100129
Joerg Roedel4b6e4dc2009-08-07 11:49:48 +0200130static int nested = 1;
Alexander Graf236de052008-11-25 20:17:10 +0100131module_param(nested, int, S_IRUGO);
132
Joerg Roedel44874f82008-08-27 14:18:43 +0200133static void svm_flush_tlb(struct kvm_vcpu *vcpu);
Joerg Roedela5c38322009-08-07 11:49:32 +0200134static void svm_complete_interrupts(struct vcpu_svm *svm);
Avi Kivity04d2cc72007-09-10 18:10:54 +0300135
Joerg Roedel410e4d52009-08-07 11:49:44 +0200136static int nested_svm_exit_handled(struct vcpu_svm *svm);
Alexander Grafcf74a782008-11-25 20:17:08 +0100137static int nested_svm_vmexit(struct vcpu_svm *svm);
Alexander Grafcf74a782008-11-25 20:17:08 +0100138static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
139 bool has_error_code, u32 error_code);
140
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400141static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
142{
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000143 return container_of(vcpu, struct vcpu_svm, vcpu);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400144}
145
Alexander Graf3d6368e2008-11-25 20:17:07 +0100146static inline bool is_nested(struct vcpu_svm *svm)
147{
Joerg Roedele6aa9ab2009-08-07 11:49:33 +0200148 return svm->nested.vmcb;
Alexander Graf3d6368e2008-11-25 20:17:07 +0100149}
150
Joerg Roedel2af91942009-08-07 11:49:28 +0200151static inline void enable_gif(struct vcpu_svm *svm)
152{
153 svm->vcpu.arch.hflags |= HF_GIF_MASK;
154}
155
156static inline void disable_gif(struct vcpu_svm *svm)
157{
158 svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
159}
160
161static inline bool gif_set(struct vcpu_svm *svm)
162{
163 return !!(svm->vcpu.arch.hflags & HF_GIF_MASK);
164}
165
Harvey Harrison4866d5e2008-02-19 10:32:02 -0800166static unsigned long iopm_base;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800167
168struct kvm_ldttss_desc {
169 u16 limit0;
170 u16 base0;
171 unsigned base1 : 8, type : 5, dpl : 2, p : 1;
172 unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
173 u32 base3;
174 u32 zero1;
175} __attribute__((packed));
176
177struct svm_cpu_data {
178 int cpu;
179
Avi Kivity5008fdf2007-04-02 13:05:50 +0300180 u64 asid_generation;
181 u32 max_asid;
182 u32 next_asid;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800183 struct kvm_ldttss_desc *tss_desc;
184
185 struct page *save_area;
186};
187
188static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
Joerg Roedel80b77062007-03-30 17:02:14 +0300189static uint32_t svm_features;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800190
191struct svm_init_data {
192 int cpu;
193 int r;
194};
195
196static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
197
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +0200198#define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800199#define MSRS_RANGE_SIZE 2048
200#define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
201
202#define MAX_INST_SIZE 15
203
Joerg Roedel80b77062007-03-30 17:02:14 +0300204static inline u32 svm_has(u32 feat)
205{
206 return svm_features & feat;
207}
208
Avi Kivity6aa8b732006-12-10 02:21:36 -0800209static inline void clgi(void)
210{
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300211 asm volatile (__ex(SVM_CLGI));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800212}
213
214static inline void stgi(void)
215{
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300216 asm volatile (__ex(SVM_STGI));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800217}
218
219static inline void invlpga(unsigned long addr, u32 asid)
220{
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300221 asm volatile (__ex(SVM_INVLPGA) :: "a"(addr), "c"(asid));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800222}
223
Avi Kivity6aa8b732006-12-10 02:21:36 -0800224static inline void force_new_asid(struct kvm_vcpu *vcpu)
225{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400226 to_svm(vcpu)->asid_generation--;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800227}
228
229static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
230{
231 force_new_asid(vcpu);
232}
233
234static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
235{
Joerg Roedel709ddeb2008-02-07 13:47:45 +0100236 if (!npt_enabled && !(efer & EFER_LMA))
Carlo Marcelo Arenas Belon2b5203e2007-12-01 06:17:11 -0600237 efer &= ~EFER_LME;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800238
Alexander Graf9962d032008-11-25 20:17:02 +0100239 to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800240 vcpu->arch.shadow_efer = efer;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800241}
242
Avi Kivity298101d2007-11-25 13:41:11 +0200243static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
244 bool has_error_code, u32 error_code)
245{
246 struct vcpu_svm *svm = to_svm(vcpu);
247
Alexander Grafcf74a782008-11-25 20:17:08 +0100248 /* If we are within a nested VM we'd better #VMEXIT and let the
249 guest handle the exception */
250 if (nested_svm_check_exception(svm, nr, has_error_code, error_code))
251 return;
252
Avi Kivity298101d2007-11-25 13:41:11 +0200253 svm->vmcb->control.event_inj = nr
254 | SVM_EVTINJ_VALID
255 | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
256 | SVM_EVTINJ_TYPE_EXEPT;
257 svm->vmcb->control.event_inj_err = error_code;
258}
259
Avi Kivity6aa8b732006-12-10 02:21:36 -0800260static int is_external_interrupt(u32 info)
261{
262 info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
263 return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
264}
265
Glauber Costa2809f5d2009-05-12 16:21:05 -0400266static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
267{
268 struct vcpu_svm *svm = to_svm(vcpu);
269 u32 ret = 0;
270
271 if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
272 ret |= X86_SHADOW_INT_STI | X86_SHADOW_INT_MOV_SS;
273 return ret & mask;
274}
275
276static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
277{
278 struct vcpu_svm *svm = to_svm(vcpu);
279
280 if (mask == 0)
281 svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
282 else
283 svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK;
284
285}
286
Avi Kivity6aa8b732006-12-10 02:21:36 -0800287static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
288{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400289 struct vcpu_svm *svm = to_svm(vcpu);
290
291 if (!svm->next_rip) {
Avi Kivity851ba692009-08-24 11:10:17 +0300292 if (emulate_instruction(vcpu, 0, 0, EMULTYPE_SKIP) !=
Gleb Natapovf629cf82009-05-11 13:35:49 +0300293 EMULATE_DONE)
294 printk(KERN_DEBUG "%s: NOP\n", __func__);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800295 return;
296 }
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300297 if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
298 printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
299 __func__, kvm_rip_read(vcpu), svm->next_rip);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800300
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300301 kvm_rip_write(vcpu, svm->next_rip);
Glauber Costa2809f5d2009-05-12 16:21:05 -0400302 svm_set_interrupt_shadow(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800303}
304
305static int has_svm(void)
306{
Eduardo Habkost63d11422008-11-17 19:03:20 -0200307 const char *msg;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800308
Eduardo Habkost63d11422008-11-17 19:03:20 -0200309 if (!cpu_has_svm(&msg)) {
Joe Perchesff81ff12009-01-08 11:05:17 -0800310 printk(KERN_INFO "has_svm: %s\n", msg);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800311 return 0;
312 }
313
Avi Kivity6aa8b732006-12-10 02:21:36 -0800314 return 1;
315}
316
317static void svm_hardware_disable(void *garbage)
318{
Eduardo Habkost2c8dcee2008-11-17 19:03:21 -0200319 cpu_svm_disable();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800320}
321
Alexander Graf10474ae2009-09-15 11:37:46 +0200322static int svm_hardware_enable(void *garbage)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800323{
324
325 struct svm_cpu_data *svm_data;
326 uint64_t efer;
Akinobu Mitab792c342009-07-19 00:00:01 +0900327 struct descriptor_table gdt_descr;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800328 struct desc_struct *gdt;
329 int me = raw_smp_processor_id();
330
Alexander Graf10474ae2009-09-15 11:37:46 +0200331 rdmsrl(MSR_EFER, efer);
332 if (efer & EFER_SVME)
333 return -EBUSY;
334
Avi Kivity6aa8b732006-12-10 02:21:36 -0800335 if (!has_svm()) {
Zachary Amsdene6732a52009-09-29 11:38:36 -1000336 printk(KERN_ERR "svm_hardware_enable: err EOPNOTSUPP on %d\n",
337 me);
Alexander Graf10474ae2009-09-15 11:37:46 +0200338 return -EINVAL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800339 }
340 svm_data = per_cpu(svm_data, me);
341
342 if (!svm_data) {
Zachary Amsdene6732a52009-09-29 11:38:36 -1000343 printk(KERN_ERR "svm_hardware_enable: svm_data is NULL on %d\n",
Avi Kivity6aa8b732006-12-10 02:21:36 -0800344 me);
Alexander Graf10474ae2009-09-15 11:37:46 +0200345 return -EINVAL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800346 }
347
348 svm_data->asid_generation = 1;
349 svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
350 svm_data->next_asid = svm_data->max_asid + 1;
351
Akinobu Mitab792c342009-07-19 00:00:01 +0900352 kvm_get_gdt(&gdt_descr);
353 gdt = (struct desc_struct *)gdt_descr.base;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800354 svm_data->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
355
Alexander Graf9962d032008-11-25 20:17:02 +0100356 wrmsrl(MSR_EFER, efer | EFER_SVME);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800357
358 wrmsrl(MSR_VM_HSAVE_PA,
359 page_to_pfn(svm_data->save_area) << PAGE_SHIFT);
Alexander Graf10474ae2009-09-15 11:37:46 +0200360
361 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800362}
363
Joerg Roedel0da1db752008-07-02 16:02:11 +0200364static void svm_cpu_uninit(int cpu)
365{
366 struct svm_cpu_data *svm_data
367 = per_cpu(svm_data, raw_smp_processor_id());
368
369 if (!svm_data)
370 return;
371
372 per_cpu(svm_data, raw_smp_processor_id()) = NULL;
373 __free_page(svm_data->save_area);
374 kfree(svm_data);
375}
376
Avi Kivity6aa8b732006-12-10 02:21:36 -0800377static int svm_cpu_init(int cpu)
378{
379 struct svm_cpu_data *svm_data;
380 int r;
381
382 svm_data = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
383 if (!svm_data)
384 return -ENOMEM;
385 svm_data->cpu = cpu;
386 svm_data->save_area = alloc_page(GFP_KERNEL);
387 r = -ENOMEM;
388 if (!svm_data->save_area)
389 goto err_1;
390
391 per_cpu(svm_data, cpu) = svm_data;
392
393 return 0;
394
395err_1:
396 kfree(svm_data);
397 return r;
398
399}
400
Rusty Russellbfc733a2007-07-31 20:42:42 +1000401static void set_msr_interception(u32 *msrpm, unsigned msr,
402 int read, int write)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800403{
404 int i;
405
406 for (i = 0; i < NUM_MSR_MAPS; i++) {
407 if (msr >= msrpm_ranges[i] &&
408 msr < msrpm_ranges[i] + MSRS_IN_RANGE) {
409 u32 msr_offset = (i * MSRS_IN_RANGE + msr -
410 msrpm_ranges[i]) * 2;
411
412 u32 *base = msrpm + (msr_offset / 32);
413 u32 msr_shift = msr_offset % 32;
414 u32 mask = ((write) ? 0 : 2) | ((read) ? 0 : 1);
415 *base = (*base & ~(0x3 << msr_shift)) |
416 (mask << msr_shift);
Rusty Russellbfc733a2007-07-31 20:42:42 +1000417 return;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800418 }
419 }
Rusty Russellbfc733a2007-07-31 20:42:42 +1000420 BUG();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800421}
422
Joerg Roedelf65c2292008-02-13 18:58:46 +0100423static void svm_vcpu_init_msrpm(u32 *msrpm)
424{
425 memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
426
427#ifdef CONFIG_X86_64
428 set_msr_interception(msrpm, MSR_GS_BASE, 1, 1);
429 set_msr_interception(msrpm, MSR_FS_BASE, 1, 1);
430 set_msr_interception(msrpm, MSR_KERNEL_GS_BASE, 1, 1);
431 set_msr_interception(msrpm, MSR_LSTAR, 1, 1);
432 set_msr_interception(msrpm, MSR_CSTAR, 1, 1);
433 set_msr_interception(msrpm, MSR_SYSCALL_MASK, 1, 1);
434#endif
435 set_msr_interception(msrpm, MSR_K6_STAR, 1, 1);
436 set_msr_interception(msrpm, MSR_IA32_SYSENTER_CS, 1, 1);
Joerg Roedelf65c2292008-02-13 18:58:46 +0100437}
438
Joerg Roedel24e09cb2008-02-13 18:58:47 +0100439static void svm_enable_lbrv(struct vcpu_svm *svm)
440{
441 u32 *msrpm = svm->msrpm;
442
443 svm->vmcb->control.lbr_ctl = 1;
444 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1);
445 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1);
446 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
447 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1);
448}
449
450static void svm_disable_lbrv(struct vcpu_svm *svm)
451{
452 u32 *msrpm = svm->msrpm;
453
454 svm->vmcb->control.lbr_ctl = 0;
455 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0);
456 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0);
457 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0);
458 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0);
459}
460
Avi Kivity6aa8b732006-12-10 02:21:36 -0800461static __init int svm_hardware_setup(void)
462{
463 int cpu;
464 struct page *iopm_pages;
Joerg Roedelf65c2292008-02-13 18:58:46 +0100465 void *iopm_va;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800466 int r;
467
Avi Kivity6aa8b732006-12-10 02:21:36 -0800468 iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
469
470 if (!iopm_pages)
471 return -ENOMEM;
Anthony Liguoric8681332007-04-30 09:48:11 +0300472
473 iopm_va = page_address(iopm_pages);
474 memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800475 iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
476
Joerg Roedel50a37eb2008-01-31 14:57:38 +0100477 if (boot_cpu_has(X86_FEATURE_NX))
478 kvm_enable_efer_bits(EFER_NX);
479
Alexander Graf1b2fd702009-02-02 16:23:51 +0100480 if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
481 kvm_enable_efer_bits(EFER_FFXSR);
482
Alexander Graf236de052008-11-25 20:17:10 +0100483 if (nested) {
484 printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
485 kvm_enable_efer_bits(EFER_SVME);
486 }
487
Zachary Amsden3230bb42009-09-29 11:38:37 -1000488 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800489 r = svm_cpu_init(cpu);
490 if (r)
Joerg Roedelf65c2292008-02-13 18:58:46 +0100491 goto err;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800492 }
Joerg Roedel33bd6a02008-02-07 13:47:38 +0100493
494 svm_features = cpuid_edx(SVM_CPUID_FUNC);
495
Joerg Roedele3da3ac2008-02-07 13:47:39 +0100496 if (!svm_has(SVM_FEATURE_NPT))
497 npt_enabled = false;
498
Joerg Roedel6c7dac72008-02-07 13:47:40 +0100499 if (npt_enabled && !npt) {
500 printk(KERN_INFO "kvm: Nested Paging disabled\n");
501 npt_enabled = false;
502 }
503
Joerg Roedel18552672008-02-07 13:47:41 +0100504 if (npt_enabled) {
Joerg Roedele3da3ac2008-02-07 13:47:39 +0100505 printk(KERN_INFO "kvm: Nested Paging enabled\n");
Joerg Roedel18552672008-02-07 13:47:41 +0100506 kvm_enable_tdp();
Joerg Roedel5f4cb662008-07-14 20:36:36 +0200507 } else
508 kvm_disable_tdp();
Joerg Roedele3da3ac2008-02-07 13:47:39 +0100509
Avi Kivity6aa8b732006-12-10 02:21:36 -0800510 return 0;
511
Joerg Roedelf65c2292008-02-13 18:58:46 +0100512err:
Avi Kivity6aa8b732006-12-10 02:21:36 -0800513 __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
514 iopm_base = 0;
515 return r;
516}
517
518static __exit void svm_hardware_unsetup(void)
519{
Joerg Roedel0da1db752008-07-02 16:02:11 +0200520 int cpu;
521
Zachary Amsden3230bb42009-09-29 11:38:37 -1000522 for_each_possible_cpu(cpu)
Joerg Roedel0da1db752008-07-02 16:02:11 +0200523 svm_cpu_uninit(cpu);
524
Avi Kivity6aa8b732006-12-10 02:21:36 -0800525 __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
Joerg Roedelf65c2292008-02-13 18:58:46 +0100526 iopm_base = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800527}
528
529static void init_seg(struct vmcb_seg *seg)
530{
531 seg->selector = 0;
532 seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
533 SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
534 seg->limit = 0xffff;
535 seg->base = 0;
536}
537
538static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
539{
540 seg->selector = 0;
541 seg->attrib = SVM_SELECTOR_P_MASK | type;
542 seg->limit = 0xffff;
543 seg->base = 0;
544}
545
Joerg Roedele6101a92008-02-13 18:58:45 +0100546static void init_vmcb(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800547{
Joerg Roedele6101a92008-02-13 18:58:45 +0100548 struct vmcb_control_area *control = &svm->vmcb->control;
549 struct vmcb_save_area *save = &svm->vmcb->save;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800550
551 control->intercept_cr_read = INTERCEPT_CR0_MASK |
552 INTERCEPT_CR3_MASK |
Joerg Roedel649d6862008-04-16 16:51:15 +0200553 INTERCEPT_CR4_MASK;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800554
555 control->intercept_cr_write = INTERCEPT_CR0_MASK |
556 INTERCEPT_CR3_MASK |
Avi Kivity80a81192007-12-06 19:50:00 +0200557 INTERCEPT_CR4_MASK |
558 INTERCEPT_CR8_MASK;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800559
560 control->intercept_dr_read = INTERCEPT_DR0_MASK |
561 INTERCEPT_DR1_MASK |
562 INTERCEPT_DR2_MASK |
563 INTERCEPT_DR3_MASK;
564
565 control->intercept_dr_write = INTERCEPT_DR0_MASK |
566 INTERCEPT_DR1_MASK |
567 INTERCEPT_DR2_MASK |
568 INTERCEPT_DR3_MASK |
569 INTERCEPT_DR5_MASK |
570 INTERCEPT_DR7_MASK;
571
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500572 control->intercept_exceptions = (1 << PF_VECTOR) |
Joerg Roedel53371b52008-04-09 14:15:30 +0200573 (1 << UD_VECTOR) |
574 (1 << MC_VECTOR);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800575
576
577 control->intercept = (1ULL << INTERCEPT_INTR) |
578 (1ULL << INTERCEPT_NMI) |
Joerg Roedel01525272007-02-19 14:37:47 +0200579 (1ULL << INTERCEPT_SMI) |
Avi Kivity6aa8b732006-12-10 02:21:36 -0800580 (1ULL << INTERCEPT_CPUID) |
Avi Kivitycf5a94d2007-10-28 16:11:58 +0200581 (1ULL << INTERCEPT_INVD) |
Avi Kivity6aa8b732006-12-10 02:21:36 -0800582 (1ULL << INTERCEPT_HLT) |
Marcelo Tosattia7052892008-09-23 13:18:35 -0300583 (1ULL << INTERCEPT_INVLPG) |
Avi Kivity6aa8b732006-12-10 02:21:36 -0800584 (1ULL << INTERCEPT_INVLPGA) |
585 (1ULL << INTERCEPT_IOIO_PROT) |
586 (1ULL << INTERCEPT_MSR_PROT) |
587 (1ULL << INTERCEPT_TASK_SWITCH) |
Joerg Roedel46fe4dd2007-01-26 00:56:42 -0800588 (1ULL << INTERCEPT_SHUTDOWN) |
Avi Kivity6aa8b732006-12-10 02:21:36 -0800589 (1ULL << INTERCEPT_VMRUN) |
590 (1ULL << INTERCEPT_VMMCALL) |
591 (1ULL << INTERCEPT_VMLOAD) |
592 (1ULL << INTERCEPT_VMSAVE) |
593 (1ULL << INTERCEPT_STGI) |
594 (1ULL << INTERCEPT_CLGI) |
Joerg Roedel916ce232007-03-21 19:47:00 +0100595 (1ULL << INTERCEPT_SKINIT) |
Avi Kivitycf5a94d2007-10-28 16:11:58 +0200596 (1ULL << INTERCEPT_WBINVD) |
Joerg Roedel916ce232007-03-21 19:47:00 +0100597 (1ULL << INTERCEPT_MONITOR) |
598 (1ULL << INTERCEPT_MWAIT);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800599
600 control->iopm_base_pa = iopm_base;
Joerg Roedelf65c2292008-02-13 18:58:46 +0100601 control->msrpm_base_pa = __pa(svm->msrpm);
Avi Kivity0cc50642007-03-25 12:07:27 +0200602 control->tsc_offset = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800603 control->int_ctl = V_INTR_MASKING_MASK;
604
605 init_seg(&save->es);
606 init_seg(&save->ss);
607 init_seg(&save->ds);
608 init_seg(&save->fs);
609 init_seg(&save->gs);
610
611 save->cs.selector = 0xf000;
612 /* Executable/Readable Code Segment */
613 save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
614 SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
615 save->cs.limit = 0xffff;
Avi Kivityd92899a2007-02-12 00:54:38 -0800616 /*
617 * cs.base should really be 0xffff0000, but vmx can't handle that, so
618 * be consistent with it.
619 *
620 * Replace when we have real mode working for vmx.
621 */
622 save->cs.base = 0xf0000;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800623
624 save->gdtr.limit = 0xffff;
625 save->idtr.limit = 0xffff;
626
627 init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
628 init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
629
Alexander Graf9962d032008-11-25 20:17:02 +0100630 save->efer = EFER_SVME;
Mike Dayd77c26f2007-10-08 09:02:08 -0400631 save->dr6 = 0xffff0ff0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800632 save->dr7 = 0x400;
633 save->rflags = 2;
634 save->rip = 0x0000fff0;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300635 svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800636
637 /*
638 * cr0 val on cpu init should be 0x60000010, we enable cpu
639 * cache by default. the orderly way is to enable cache in bios.
640 */
Rusty Russell707d92fa2007-07-17 23:19:08 +1000641 save->cr0 = 0x00000010 | X86_CR0_PG | X86_CR0_WP;
Rusty Russell66aee912007-07-17 23:34:16 +1000642 save->cr4 = X86_CR4_PAE;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800643 /* rdx = ?? */
Joerg Roedel709ddeb2008-02-07 13:47:45 +0100644
645 if (npt_enabled) {
646 /* Setup VMCB for Nested Paging */
647 control->nested_ctl = 1;
Marcelo Tosattia7052892008-09-23 13:18:35 -0300648 control->intercept &= ~((1ULL << INTERCEPT_TASK_SWITCH) |
649 (1ULL << INTERCEPT_INVLPG));
Joerg Roedel709ddeb2008-02-07 13:47:45 +0100650 control->intercept_exceptions &= ~(1 << PF_VECTOR);
651 control->intercept_cr_read &= ~(INTERCEPT_CR0_MASK|
652 INTERCEPT_CR3_MASK);
653 control->intercept_cr_write &= ~(INTERCEPT_CR0_MASK|
654 INTERCEPT_CR3_MASK);
655 save->g_pat = 0x0007040600070406ULL;
656 /* enable caching because the QEMU Bios doesn't enable it */
657 save->cr0 = X86_CR0_ET;
658 save->cr3 = 0;
659 save->cr4 = 0;
660 }
Avi Kivitya79d2f12008-04-14 13:10:21 +0300661 force_new_asid(&svm->vcpu);
Alexander Graf1371d902008-11-25 20:17:04 +0100662
Joerg Roedele6aa9ab2009-08-07 11:49:33 +0200663 svm->nested.vmcb = 0;
Joerg Roedel2af91942009-08-07 11:49:28 +0200664 svm->vcpu.arch.hflags = 0;
665
666 enable_gif(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800667}
668
Avi Kivitye00c8cf2007-10-21 11:00:39 +0200669static int svm_vcpu_reset(struct kvm_vcpu *vcpu)
Avi Kivity04d2cc72007-09-10 18:10:54 +0300670{
671 struct vcpu_svm *svm = to_svm(vcpu);
672
Joerg Roedele6101a92008-02-13 18:58:45 +0100673 init_vmcb(svm);
Avi Kivity70433382007-11-07 12:57:23 +0200674
Gleb Natapovc5af89b2009-06-09 15:56:26 +0300675 if (!kvm_vcpu_is_bsp(vcpu)) {
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300676 kvm_rip_write(vcpu, 0);
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800677 svm->vmcb->save.cs.base = svm->vcpu.arch.sipi_vector << 12;
678 svm->vmcb->save.cs.selector = svm->vcpu.arch.sipi_vector << 8;
Avi Kivity70433382007-11-07 12:57:23 +0200679 }
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300680 vcpu->arch.regs_avail = ~0;
681 vcpu->arch.regs_dirty = ~0;
Avi Kivitye00c8cf2007-10-21 11:00:39 +0200682
683 return 0;
Avi Kivity04d2cc72007-09-10 18:10:54 +0300684}
685
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000686static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800687{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400688 struct vcpu_svm *svm;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800689 struct page *page;
Joerg Roedelf65c2292008-02-13 18:58:46 +0100690 struct page *msrpm_pages;
Alexander Grafb286d5d2008-11-25 20:17:05 +0100691 struct page *hsave_page;
Alexander Graf3d6368e2008-11-25 20:17:07 +0100692 struct page *nested_msrpm_pages;
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000693 int err;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800694
Rusty Russellc16f8622007-07-30 21:12:19 +1000695 svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000696 if (!svm) {
697 err = -ENOMEM;
698 goto out;
699 }
700
701 err = kvm_vcpu_init(&svm->vcpu, kvm, id);
702 if (err)
703 goto free_svm;
704
Avi Kivity6aa8b732006-12-10 02:21:36 -0800705 page = alloc_page(GFP_KERNEL);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000706 if (!page) {
707 err = -ENOMEM;
708 goto uninit;
709 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800710
Joerg Roedelf65c2292008-02-13 18:58:46 +0100711 err = -ENOMEM;
712 msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
713 if (!msrpm_pages)
714 goto uninit;
Alexander Graf3d6368e2008-11-25 20:17:07 +0100715
716 nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
717 if (!nested_msrpm_pages)
718 goto uninit;
719
Joerg Roedelf65c2292008-02-13 18:58:46 +0100720 svm->msrpm = page_address(msrpm_pages);
721 svm_vcpu_init_msrpm(svm->msrpm);
722
Alexander Grafb286d5d2008-11-25 20:17:05 +0100723 hsave_page = alloc_page(GFP_KERNEL);
724 if (!hsave_page)
725 goto uninit;
Joerg Roedele6aa9ab2009-08-07 11:49:33 +0200726 svm->nested.hsave = page_address(hsave_page);
Alexander Grafb286d5d2008-11-25 20:17:05 +0100727
Joerg Roedele6aa9ab2009-08-07 11:49:33 +0200728 svm->nested.msrpm = page_address(nested_msrpm_pages);
Alexander Graf3d6368e2008-11-25 20:17:07 +0100729
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400730 svm->vmcb = page_address(page);
731 clear_page(svm->vmcb);
732 svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
733 svm->asid_generation = 0;
Joerg Roedele6101a92008-02-13 18:58:45 +0100734 init_vmcb(svm);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400735
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000736 fx_init(&svm->vcpu);
737 svm->vcpu.fpu_active = 1;
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800738 svm->vcpu.arch.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
Gleb Natapovc5af89b2009-06-09 15:56:26 +0300739 if (kvm_vcpu_is_bsp(&svm->vcpu))
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800740 svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800741
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000742 return &svm->vcpu;
Avi Kivity36241b82006-12-22 01:05:20 -0800743
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000744uninit:
745 kvm_vcpu_uninit(&svm->vcpu);
746free_svm:
Rusty Russella4770342007-08-01 14:46:11 +1000747 kmem_cache_free(kvm_vcpu_cache, svm);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000748out:
749 return ERR_PTR(err);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800750}
751
752static void svm_free_vcpu(struct kvm_vcpu *vcpu)
753{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400754 struct vcpu_svm *svm = to_svm(vcpu);
755
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000756 __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT));
Joerg Roedelf65c2292008-02-13 18:58:46 +0100757 __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
Joerg Roedele6aa9ab2009-08-07 11:49:33 +0200758 __free_page(virt_to_page(svm->nested.hsave));
759 __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000760 kvm_vcpu_uninit(vcpu);
Rusty Russella4770342007-08-01 14:46:11 +1000761 kmem_cache_free(kvm_vcpu_cache, svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800762}
763
Avi Kivity15ad7142007-07-11 18:17:21 +0300764static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800765{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400766 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +0300767 int i;
Avi Kivity0cc50642007-03-25 12:07:27 +0200768
Avi Kivity0cc50642007-03-25 12:07:27 +0200769 if (unlikely(cpu != vcpu->cpu)) {
Joerg Roedele935d482009-09-16 15:24:19 +0200770 u64 delta;
Avi Kivity0cc50642007-03-25 12:07:27 +0200771
772 /*
773 * Make sure that the guest sees a monotonically
774 * increasing TSC.
775 */
Joerg Roedele935d482009-09-16 15:24:19 +0200776 delta = vcpu->arch.host_tsc - native_read_tsc();
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400777 svm->vmcb->control.tsc_offset += delta;
Joerg Roedel77b1ab12009-09-16 15:24:17 +0200778 if (is_nested(svm))
779 svm->nested.hsave->control.tsc_offset += delta;
Avi Kivity0cc50642007-03-25 12:07:27 +0200780 vcpu->cpu = cpu;
Marcelo Tosatti2f599712008-05-27 12:10:20 -0300781 kvm_migrate_timers(vcpu);
Marcelo Tosatti4b656b12009-07-21 12:47:45 -0300782 svm->asid_generation = 0;
Avi Kivity0cc50642007-03-25 12:07:27 +0200783 }
Anthony Liguori94dfbdb2007-04-29 11:56:06 +0300784
785 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400786 rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800787}
788
789static void svm_vcpu_put(struct kvm_vcpu *vcpu)
790{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400791 struct vcpu_svm *svm = to_svm(vcpu);
Anthony Liguori94dfbdb2007-04-29 11:56:06 +0300792 int i;
793
Avi Kivitye1beb1d2007-11-18 13:50:24 +0200794 ++vcpu->stat.host_state_reload;
Anthony Liguori94dfbdb2007-04-29 11:56:06 +0300795 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400796 wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
Anthony Liguori94dfbdb2007-04-29 11:56:06 +0300797
Joerg Roedele935d482009-09-16 15:24:19 +0200798 vcpu->arch.host_tsc = native_read_tsc();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800799}
800
Avi Kivity6aa8b732006-12-10 02:21:36 -0800801static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
802{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400803 return to_svm(vcpu)->vmcb->save.rflags;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800804}
805
806static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
807{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400808 to_svm(vcpu)->vmcb->save.rflags = rflags;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800809}
810
Avi Kivity6de4f3a2009-05-31 22:58:47 +0300811static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
812{
813 switch (reg) {
814 case VCPU_EXREG_PDPTR:
815 BUG_ON(!npt_enabled);
816 load_pdptrs(vcpu, vcpu->arch.cr3);
817 break;
818 default:
819 BUG();
820 }
821}
822
Alexander Graff0b85052008-11-25 20:17:01 +0100823static void svm_set_vintr(struct vcpu_svm *svm)
824{
825 svm->vmcb->control.intercept |= 1ULL << INTERCEPT_VINTR;
826}
827
828static void svm_clear_vintr(struct vcpu_svm *svm)
829{
830 svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VINTR);
831}
832
Avi Kivity6aa8b732006-12-10 02:21:36 -0800833static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
834{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400835 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800836
837 switch (seg) {
838 case VCPU_SREG_CS: return &save->cs;
839 case VCPU_SREG_DS: return &save->ds;
840 case VCPU_SREG_ES: return &save->es;
841 case VCPU_SREG_FS: return &save->fs;
842 case VCPU_SREG_GS: return &save->gs;
843 case VCPU_SREG_SS: return &save->ss;
844 case VCPU_SREG_TR: return &save->tr;
845 case VCPU_SREG_LDTR: return &save->ldtr;
846 }
847 BUG();
Al Viro8b6d44c2007-02-09 16:38:40 +0000848 return NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800849}
850
851static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
852{
853 struct vmcb_seg *s = svm_seg(vcpu, seg);
854
855 return s->base;
856}
857
858static void svm_get_segment(struct kvm_vcpu *vcpu,
859 struct kvm_segment *var, int seg)
860{
861 struct vmcb_seg *s = svm_seg(vcpu, seg);
862
863 var->base = s->base;
864 var->limit = s->limit;
865 var->selector = s->selector;
866 var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
867 var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
868 var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
869 var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
870 var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
871 var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
872 var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
873 var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
Amit Shah25022ac2008-10-27 09:04:17 +0000874
Andre Przywara19bca6a2009-04-28 12:45:30 +0200875 /* AMD's VMCB does not have an explicit unusable field, so emulate it
876 * for cross vendor migration purposes by "not present"
877 */
878 var->unusable = !var->present || (var->type == 0);
879
Andre Przywara1fbdc7a2009-01-11 22:39:44 +0100880 switch (seg) {
881 case VCPU_SREG_CS:
882 /*
883 * SVM always stores 0 for the 'G' bit in the CS selector in
884 * the VMCB on a VMEXIT. This hurts cross-vendor migration:
885 * Intel's VMENTRY has a check on the 'G' bit.
886 */
Amit Shah25022ac2008-10-27 09:04:17 +0000887 var->g = s->limit > 0xfffff;
Andre Przywara1fbdc7a2009-01-11 22:39:44 +0100888 break;
889 case VCPU_SREG_TR:
890 /*
891 * Work around a bug where the busy flag in the tr selector
892 * isn't exposed
893 */
Amit Shahc0d09822008-10-27 09:04:18 +0000894 var->type |= 0x2;
Andre Przywara1fbdc7a2009-01-11 22:39:44 +0100895 break;
896 case VCPU_SREG_DS:
897 case VCPU_SREG_ES:
898 case VCPU_SREG_FS:
899 case VCPU_SREG_GS:
900 /*
901 * The accessed bit must always be set in the segment
902 * descriptor cache, although it can be cleared in the
903 * descriptor, the cached bit always remains at 1. Since
904 * Intel has a check on this, set it here to support
905 * cross-vendor migration.
906 */
907 if (!var->unusable)
908 var->type |= 0x1;
909 break;
Andre Przywarab586eb02009-04-28 12:45:43 +0200910 case VCPU_SREG_SS:
911 /* On AMD CPUs sometimes the DB bit in the segment
912 * descriptor is left as 1, although the whole segment has
913 * been made unusable. Clear it here to pass an Intel VMX
914 * entry check when cross vendor migrating.
915 */
916 if (var->unusable)
917 var->db = 0;
918 break;
Andre Przywara1fbdc7a2009-01-11 22:39:44 +0100919 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800920}
921
Izik Eidus2e4d2652008-03-24 19:38:34 +0200922static int svm_get_cpl(struct kvm_vcpu *vcpu)
923{
924 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
925
926 return save->cpl;
927}
928
Avi Kivity6aa8b732006-12-10 02:21:36 -0800929static void svm_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
930{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400931 struct vcpu_svm *svm = to_svm(vcpu);
932
933 dt->limit = svm->vmcb->save.idtr.limit;
934 dt->base = svm->vmcb->save.idtr.base;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800935}
936
937static void svm_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
938{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400939 struct vcpu_svm *svm = to_svm(vcpu);
940
941 svm->vmcb->save.idtr.limit = dt->limit;
942 svm->vmcb->save.idtr.base = dt->base ;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800943}
944
945static void svm_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
946{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400947 struct vcpu_svm *svm = to_svm(vcpu);
948
949 dt->limit = svm->vmcb->save.gdtr.limit;
950 dt->base = svm->vmcb->save.gdtr.base;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800951}
952
953static void svm_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
954{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400955 struct vcpu_svm *svm = to_svm(vcpu);
956
957 svm->vmcb->save.gdtr.limit = dt->limit;
958 svm->vmcb->save.gdtr.base = dt->base ;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800959}
960
Anthony Liguori25c4c272007-04-27 09:29:21 +0300961static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
Avi Kivity399badf2007-01-05 16:36:38 -0800962{
963}
964
Avi Kivity6aa8b732006-12-10 02:21:36 -0800965static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
966{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400967 struct vcpu_svm *svm = to_svm(vcpu);
968
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800969#ifdef CONFIG_X86_64
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800970 if (vcpu->arch.shadow_efer & EFER_LME) {
Rusty Russell707d92fa2007-07-17 23:19:08 +1000971 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800972 vcpu->arch.shadow_efer |= EFER_LMA;
Carlo Marcelo Arenas Belon2b5203e2007-12-01 06:17:11 -0600973 svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800974 }
975
Mike Dayd77c26f2007-10-08 09:02:08 -0400976 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800977 vcpu->arch.shadow_efer &= ~EFER_LMA;
Carlo Marcelo Arenas Belon2b5203e2007-12-01 06:17:11 -0600978 svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800979 }
980 }
981#endif
Joerg Roedel709ddeb2008-02-07 13:47:45 +0100982 if (npt_enabled)
983 goto set;
984
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800985 if ((vcpu->arch.cr0 & X86_CR0_TS) && !(cr0 & X86_CR0_TS)) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400986 svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
Anthony Liguori7807fa62007-04-23 09:17:21 -0500987 vcpu->fpu_active = 1;
988 }
989
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800990 vcpu->arch.cr0 = cr0;
Rusty Russell707d92fa2007-07-17 23:19:08 +1000991 cr0 |= X86_CR0_PG | X86_CR0_WP;
Joerg Roedel6b390b62008-01-29 13:01:27 +0100992 if (!vcpu->fpu_active) {
993 svm->vmcb->control.intercept_exceptions |= (1 << NM_VECTOR);
Joerg Roedel334df502008-01-21 13:09:33 +0100994 cr0 |= X86_CR0_TS;
Joerg Roedel6b390b62008-01-29 13:01:27 +0100995 }
Joerg Roedel709ddeb2008-02-07 13:47:45 +0100996set:
997 /*
998 * re-enable caching here because the QEMU bios
999 * does not do it - this results in some delay at
1000 * reboot
1001 */
1002 cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001003 svm->vmcb->save.cr0 = cr0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001004}
1005
1006static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
1007{
Joerg Roedel6394b642008-04-09 14:15:29 +02001008 unsigned long host_cr4_mce = read_cr4() & X86_CR4_MCE;
Joerg Roedele5eab0c2008-09-09 19:11:51 +02001009 unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;
1010
1011 if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
1012 force_new_asid(vcpu);
Joerg Roedel6394b642008-04-09 14:15:29 +02001013
Joerg Roedelec077262008-04-09 14:15:28 +02001014 vcpu->arch.cr4 = cr4;
1015 if (!npt_enabled)
1016 cr4 |= X86_CR4_PAE;
Joerg Roedel6394b642008-04-09 14:15:29 +02001017 cr4 |= host_cr4_mce;
Joerg Roedelec077262008-04-09 14:15:28 +02001018 to_svm(vcpu)->vmcb->save.cr4 = cr4;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001019}
1020
1021static void svm_set_segment(struct kvm_vcpu *vcpu,
1022 struct kvm_segment *var, int seg)
1023{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001024 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001025 struct vmcb_seg *s = svm_seg(vcpu, seg);
1026
1027 s->base = var->base;
1028 s->limit = var->limit;
1029 s->selector = var->selector;
1030 if (var->unusable)
1031 s->attrib = 0;
1032 else {
1033 s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
1034 s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
1035 s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
1036 s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
1037 s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
1038 s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
1039 s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
1040 s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
1041 }
1042 if (seg == VCPU_SREG_CS)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001043 svm->vmcb->save.cpl
1044 = (svm->vmcb->save.cs.attrib
Avi Kivity6aa8b732006-12-10 02:21:36 -08001045 >> SVM_SELECTOR_DPL_SHIFT) & 3;
1046
1047}
1048
Gleb Natapov44c11432009-05-11 13:35:52 +03001049static void update_db_intercept(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001050{
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001051 struct vcpu_svm *svm = to_svm(vcpu);
1052
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001053 svm->vmcb->control.intercept_exceptions &=
1054 ~((1 << DB_VECTOR) | (1 << BP_VECTOR));
Gleb Natapov44c11432009-05-11 13:35:52 +03001055
1056 if (vcpu->arch.singlestep)
1057 svm->vmcb->control.intercept_exceptions |= (1 << DB_VECTOR);
1058
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001059 if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
1060 if (vcpu->guest_debug &
1061 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
1062 svm->vmcb->control.intercept_exceptions |=
1063 1 << DB_VECTOR;
1064 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
1065 svm->vmcb->control.intercept_exceptions |=
1066 1 << BP_VECTOR;
1067 } else
1068 vcpu->guest_debug = 0;
Gleb Natapov44c11432009-05-11 13:35:52 +03001069}
1070
Jan Kiszka355be0b2009-10-03 00:31:21 +02001071static void svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
Gleb Natapov44c11432009-05-11 13:35:52 +03001072{
Gleb Natapov44c11432009-05-11 13:35:52 +03001073 struct vcpu_svm *svm = to_svm(vcpu);
1074
Jan Kiszkaae675ef2008-12-15 13:52:10 +01001075 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
1076 svm->vmcb->save.dr7 = dbg->arch.debugreg[7];
1077 else
1078 svm->vmcb->save.dr7 = vcpu->arch.dr7;
1079
Jan Kiszka355be0b2009-10-03 00:31:21 +02001080 update_db_intercept(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001081}
1082
1083static void load_host_msrs(struct kvm_vcpu *vcpu)
1084{
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001085#ifdef CONFIG_X86_64
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001086 wrmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base);
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001087#endif
Avi Kivity6aa8b732006-12-10 02:21:36 -08001088}
1089
1090static void save_host_msrs(struct kvm_vcpu *vcpu)
1091{
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001092#ifdef CONFIG_X86_64
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001093 rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base);
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001094#endif
Avi Kivity6aa8b732006-12-10 02:21:36 -08001095}
1096
Rusty Russelle756fc62007-07-30 20:07:08 +10001097static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *svm_data)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001098{
1099 if (svm_data->next_asid > svm_data->max_asid) {
1100 ++svm_data->asid_generation;
1101 svm_data->next_asid = 1;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001102 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001103 }
1104
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001105 svm->asid_generation = svm_data->asid_generation;
1106 svm->vmcb->control.asid = svm_data->next_asid++;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001107}
1108
Avi Kivity6aa8b732006-12-10 02:21:36 -08001109static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr)
1110{
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001111 struct vcpu_svm *svm = to_svm(vcpu);
1112 unsigned long val;
1113
1114 switch (dr) {
1115 case 0 ... 3:
1116 val = vcpu->arch.db[dr];
1117 break;
1118 case 6:
1119 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
1120 val = vcpu->arch.dr6;
1121 else
1122 val = svm->vmcb->save.dr6;
1123 break;
1124 case 7:
1125 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
1126 val = vcpu->arch.dr7;
1127 else
1128 val = svm->vmcb->save.dr7;
1129 break;
1130 default:
1131 val = 0;
1132 }
1133
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02001134 return val;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001135}
1136
1137static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value,
1138 int *exception)
1139{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001140 struct vcpu_svm *svm = to_svm(vcpu);
1141
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001142 *exception = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001143
1144 switch (dr) {
1145 case 0 ... 3:
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001146 vcpu->arch.db[dr] = value;
1147 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
1148 vcpu->arch.eff_db[dr] = value;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001149 return;
1150 case 4 ... 5:
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001151 if (vcpu->arch.cr4 & X86_CR4_DE)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001152 *exception = UD_VECTOR;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001153 return;
1154 case 6:
1155 if (value & 0xffffffff00000000ULL) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001156 *exception = GP_VECTOR;
1157 return;
1158 }
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001159 vcpu->arch.dr6 = (value & DR6_VOLATILE) | DR6_FIXED_1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001160 return;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001161 case 7:
1162 if (value & 0xffffffff00000000ULL) {
1163 *exception = GP_VECTOR;
1164 return;
1165 }
1166 vcpu->arch.dr7 = (value & DR7_VOLATILE) | DR7_FIXED_1;
1167 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
1168 svm->vmcb->save.dr7 = vcpu->arch.dr7;
1169 vcpu->arch.switch_db_regs = (value & DR7_BP_EN_MASK);
1170 }
1171 return;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001172 default:
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001173 /* FIXME: Possible case? */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001174 printk(KERN_DEBUG "%s: unexpected dr %u\n",
Harvey Harrisonb8688d52008-03-03 12:59:56 -08001175 __func__, dr);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001176 *exception = UD_VECTOR;
1177 return;
1178 }
1179}
1180
Avi Kivity851ba692009-08-24 11:10:17 +03001181static int pf_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001182{
Avi Kivity6aa8b732006-12-10 02:21:36 -08001183 u64 fault_address;
1184 u32 error_code;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001185
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001186 fault_address = svm->vmcb->control.exit_info_2;
1187 error_code = svm->vmcb->control.exit_info_1;
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02001188
Marcelo Tosatti229456f2009-06-17 09:22:14 -03001189 trace_kvm_page_fault(fault_address, error_code);
Avi Kivity52c78472009-08-10 15:42:41 +03001190 if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu))
1191 kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address);
Avi Kivity30677142007-10-28 18:48:59 +02001192 return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001193}
1194
Avi Kivity851ba692009-08-24 11:10:17 +03001195static int db_interception(struct vcpu_svm *svm)
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001196{
Avi Kivity851ba692009-08-24 11:10:17 +03001197 struct kvm_run *kvm_run = svm->vcpu.run;
1198
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001199 if (!(svm->vcpu.guest_debug &
Gleb Natapov44c11432009-05-11 13:35:52 +03001200 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
1201 !svm->vcpu.arch.singlestep) {
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001202 kvm_queue_exception(&svm->vcpu, DB_VECTOR);
1203 return 1;
1204 }
Gleb Natapov44c11432009-05-11 13:35:52 +03001205
1206 if (svm->vcpu.arch.singlestep) {
1207 svm->vcpu.arch.singlestep = false;
1208 if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP))
1209 svm->vmcb->save.rflags &=
1210 ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
1211 update_db_intercept(&svm->vcpu);
1212 }
1213
1214 if (svm->vcpu.guest_debug &
1215 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)){
1216 kvm_run->exit_reason = KVM_EXIT_DEBUG;
1217 kvm_run->debug.arch.pc =
1218 svm->vmcb->save.cs.base + svm->vmcb->save.rip;
1219 kvm_run->debug.arch.exception = DB_VECTOR;
1220 return 0;
1221 }
1222
1223 return 1;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001224}
1225
Avi Kivity851ba692009-08-24 11:10:17 +03001226static int bp_interception(struct vcpu_svm *svm)
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001227{
Avi Kivity851ba692009-08-24 11:10:17 +03001228 struct kvm_run *kvm_run = svm->vcpu.run;
1229
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001230 kvm_run->exit_reason = KVM_EXIT_DEBUG;
1231 kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip;
1232 kvm_run->debug.arch.exception = BP_VECTOR;
1233 return 0;
1234}
1235
Avi Kivity851ba692009-08-24 11:10:17 +03001236static int ud_interception(struct vcpu_svm *svm)
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001237{
1238 int er;
1239
Avi Kivity851ba692009-08-24 11:10:17 +03001240 er = emulate_instruction(&svm->vcpu, 0, 0, EMULTYPE_TRAP_UD);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001241 if (er != EMULATE_DONE)
Avi Kivity7ee5d9402007-11-25 15:22:50 +02001242 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001243 return 1;
1244}
1245
Avi Kivity851ba692009-08-24 11:10:17 +03001246static int nm_interception(struct vcpu_svm *svm)
Anthony Liguori7807fa62007-04-23 09:17:21 -05001247{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001248 svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001249 if (!(svm->vcpu.arch.cr0 & X86_CR0_TS))
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001250 svm->vmcb->save.cr0 &= ~X86_CR0_TS;
Rusty Russelle756fc62007-07-30 20:07:08 +10001251 svm->vcpu.fpu_active = 1;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001252
1253 return 1;
Anthony Liguori7807fa62007-04-23 09:17:21 -05001254}
1255
Avi Kivity851ba692009-08-24 11:10:17 +03001256static int mc_interception(struct vcpu_svm *svm)
Joerg Roedel53371b52008-04-09 14:15:30 +02001257{
1258 /*
1259 * On an #MC intercept the MCE handler is not called automatically in
1260 * the host. So do it by hand here.
1261 */
1262 asm volatile (
1263 "int $0x12\n");
1264 /* not sure if we ever come back to this point */
1265
1266 return 1;
1267}
1268
Avi Kivity851ba692009-08-24 11:10:17 +03001269static int shutdown_interception(struct vcpu_svm *svm)
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08001270{
Avi Kivity851ba692009-08-24 11:10:17 +03001271 struct kvm_run *kvm_run = svm->vcpu.run;
1272
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08001273 /*
1274 * VMCB is undefined after a SHUTDOWN intercept
1275 * so reinitialize it.
1276 */
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001277 clear_page(svm->vmcb);
Joerg Roedele6101a92008-02-13 18:58:45 +01001278 init_vmcb(svm);
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08001279
1280 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
1281 return 0;
1282}
1283
Avi Kivity851ba692009-08-24 11:10:17 +03001284static int io_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001285{
Mike Dayd77c26f2007-10-08 09:02:08 -04001286 u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
Jan Kiszka34c33d12009-02-08 13:28:15 +01001287 int size, in, string;
Avi Kivity039576c2007-03-20 12:46:50 +02001288 unsigned port;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001289
Rusty Russelle756fc62007-07-30 20:07:08 +10001290 ++svm->vcpu.stat.io_exits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001291
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001292 svm->next_rip = svm->vmcb->control.exit_info_2;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001293
Laurent Viviere70669a2007-08-05 10:36:40 +03001294 string = (io_info & SVM_IOIO_STR_MASK) != 0;
1295
1296 if (string) {
Laurent Vivier34273182007-09-18 11:27:37 +02001297 if (emulate_instruction(&svm->vcpu,
Avi Kivity851ba692009-08-24 11:10:17 +03001298 0, 0, 0) == EMULATE_DO_MMIO)
Laurent Viviere70669a2007-08-05 10:36:40 +03001299 return 0;
1300 return 1;
1301 }
1302
Avi Kivity039576c2007-03-20 12:46:50 +02001303 in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
1304 port = io_info >> 16;
1305 size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001306
Guillaume Thouvenine93f36b2008-10-28 10:51:30 +01001307 skip_emulated_instruction(&svm->vcpu);
Avi Kivity851ba692009-08-24 11:10:17 +03001308 return kvm_emulate_pio(&svm->vcpu, in, size, port);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001309}
1310
Avi Kivity851ba692009-08-24 11:10:17 +03001311static int nmi_interception(struct vcpu_svm *svm)
Joerg Roedelc47f0982008-04-30 17:56:00 +02001312{
1313 return 1;
1314}
1315
Avi Kivity851ba692009-08-24 11:10:17 +03001316static int intr_interception(struct vcpu_svm *svm)
Joerg Roedela0698052008-04-30 17:56:01 +02001317{
1318 ++svm->vcpu.stat.irq_exits;
1319 return 1;
1320}
1321
Avi Kivity851ba692009-08-24 11:10:17 +03001322static int nop_on_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001323{
1324 return 1;
1325}
1326
Avi Kivity851ba692009-08-24 11:10:17 +03001327static int halt_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001328{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001329 svm->next_rip = kvm_rip_read(&svm->vcpu) + 1;
Rusty Russelle756fc62007-07-30 20:07:08 +10001330 skip_emulated_instruction(&svm->vcpu);
1331 return kvm_emulate_halt(&svm->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001332}
1333
Avi Kivity851ba692009-08-24 11:10:17 +03001334static int vmmcall_interception(struct vcpu_svm *svm)
Avi Kivity02e235b2007-02-19 14:37:47 +02001335{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001336 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
Rusty Russelle756fc62007-07-30 20:07:08 +10001337 skip_emulated_instruction(&svm->vcpu);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001338 kvm_emulate_hypercall(&svm->vcpu);
1339 return 1;
Avi Kivity02e235b2007-02-19 14:37:47 +02001340}
1341
Alexander Grafc0725422008-11-25 20:17:03 +01001342static int nested_svm_check_permissions(struct vcpu_svm *svm)
1343{
1344 if (!(svm->vcpu.arch.shadow_efer & EFER_SVME)
1345 || !is_paging(&svm->vcpu)) {
1346 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
1347 return 1;
1348 }
1349
1350 if (svm->vmcb->save.cpl) {
1351 kvm_inject_gp(&svm->vcpu, 0);
1352 return 1;
1353 }
1354
1355 return 0;
1356}
1357
Alexander Grafcf74a782008-11-25 20:17:08 +01001358static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
1359 bool has_error_code, u32 error_code)
1360{
Joerg Roedel0295ad72009-08-07 11:49:37 +02001361 if (!is_nested(svm))
1362 return 0;
Alexander Grafcf74a782008-11-25 20:17:08 +01001363
Joerg Roedel0295ad72009-08-07 11:49:37 +02001364 svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
1365 svm->vmcb->control.exit_code_hi = 0;
1366 svm->vmcb->control.exit_info_1 = error_code;
1367 svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
1368
Joerg Roedel410e4d52009-08-07 11:49:44 +02001369 return nested_svm_exit_handled(svm);
Alexander Grafcf74a782008-11-25 20:17:08 +01001370}
1371
1372static inline int nested_svm_intr(struct vcpu_svm *svm)
1373{
Joerg Roedel26666952009-08-07 11:49:46 +02001374 if (!is_nested(svm))
1375 return 0;
Alexander Grafcf74a782008-11-25 20:17:08 +01001376
Joerg Roedel26666952009-08-07 11:49:46 +02001377 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
1378 return 0;
Alexander Grafcf74a782008-11-25 20:17:08 +01001379
Joerg Roedel26666952009-08-07 11:49:46 +02001380 if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
1381 return 0;
Alexander Grafcf74a782008-11-25 20:17:08 +01001382
Joerg Roedel26666952009-08-07 11:49:46 +02001383 svm->vmcb->control.exit_code = SVM_EXIT_INTR;
1384
Joerg Roedelcd3ff652009-10-09 16:08:26 +02001385 if (svm->nested.intercept & 1ULL) {
1386 /*
1387 * The #vmexit can't be emulated here directly because this
1388 * code path runs with irqs and preemtion disabled. A
1389 * #vmexit emulation might sleep. Only signal request for
1390 * the #vmexit here.
1391 */
1392 svm->nested.exit_required = true;
Joerg Roedel26666952009-08-07 11:49:46 +02001393 nsvm_printk("VMexit -> INTR\n");
1394 return 1;
Alexander Grafcf74a782008-11-25 20:17:08 +01001395 }
1396
1397 return 0;
1398}
1399
Joerg Roedel34f80cf2009-08-07 11:49:38 +02001400static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, enum km_type idx)
1401{
1402 struct page *page;
1403
Joerg Roedel34f80cf2009-08-07 11:49:38 +02001404 page = gfn_to_page(svm->vcpu.kvm, gpa >> PAGE_SHIFT);
Joerg Roedel34f80cf2009-08-07 11:49:38 +02001405 if (is_error_page(page))
1406 goto error;
1407
1408 return kmap_atomic(page, idx);
1409
1410error:
1411 kvm_release_page_clean(page);
1412 kvm_inject_gp(&svm->vcpu, 0);
1413
1414 return NULL;
1415}
1416
1417static void nested_svm_unmap(void *addr, enum km_type idx)
1418{
1419 struct page *page;
1420
1421 if (!addr)
1422 return;
1423
1424 page = kmap_atomic_to_page(addr);
1425
1426 kunmap_atomic(addr, idx);
1427 kvm_release_page_dirty(page);
1428}
1429
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02001430static bool nested_svm_exit_handled_msr(struct vcpu_svm *svm)
Alexander Grafcf74a782008-11-25 20:17:08 +01001431{
Joerg Roedel4c2161a2009-08-07 11:49:35 +02001432 u32 param = svm->vmcb->control.exit_info_1 & 1;
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02001433 u32 msr = svm->vcpu.arch.regs[VCPU_REGS_RCX];
1434 bool ret = false;
1435 u32 t0, t1;
1436 u8 *msrpm;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02001437
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02001438 if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
1439 return false;
1440
1441 msrpm = nested_svm_map(svm, svm->nested.vmcb_msrpm, KM_USER0);
1442
1443 if (!msrpm)
1444 goto out;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02001445
1446 switch (msr) {
1447 case 0 ... 0x1fff:
1448 t0 = (msr * 2) % 8;
1449 t1 = msr / 8;
1450 break;
1451 case 0xc0000000 ... 0xc0001fff:
1452 t0 = (8192 + msr - 0xc0000000) * 2;
1453 t1 = (t0 / 8);
1454 t0 %= 8;
1455 break;
1456 case 0xc0010000 ... 0xc0011fff:
1457 t0 = (16384 + msr - 0xc0010000) * 2;
1458 t1 = (t0 / 8);
1459 t0 %= 8;
1460 break;
1461 default:
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02001462 ret = true;
1463 goto out;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02001464 }
Joerg Roedel4c2161a2009-08-07 11:49:35 +02001465
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02001466 ret = msrpm[t1] & ((1 << param) << t0);
1467
1468out:
1469 nested_svm_unmap(msrpm, KM_USER0);
1470
1471 return ret;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02001472}
1473
Joerg Roedel410e4d52009-08-07 11:49:44 +02001474static int nested_svm_exit_special(struct vcpu_svm *svm)
Joerg Roedel4c2161a2009-08-07 11:49:35 +02001475{
Alexander Grafcf74a782008-11-25 20:17:08 +01001476 u32 exit_code = svm->vmcb->control.exit_code;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02001477
Joerg Roedel410e4d52009-08-07 11:49:44 +02001478 switch (exit_code) {
1479 case SVM_EXIT_INTR:
1480 case SVM_EXIT_NMI:
1481 return NESTED_EXIT_HOST;
Alexander Grafcf74a782008-11-25 20:17:08 +01001482 /* For now we are always handling NPFs when using them */
Joerg Roedel410e4d52009-08-07 11:49:44 +02001483 case SVM_EXIT_NPF:
1484 if (npt_enabled)
1485 return NESTED_EXIT_HOST;
1486 break;
1487 /* When we're shadowing, trap PFs */
1488 case SVM_EXIT_EXCP_BASE + PF_VECTOR:
1489 if (!npt_enabled)
1490 return NESTED_EXIT_HOST;
1491 break;
1492 default:
1493 break;
Alexander Grafcf74a782008-11-25 20:17:08 +01001494 }
1495
Joerg Roedel410e4d52009-08-07 11:49:44 +02001496 return NESTED_EXIT_CONTINUE;
1497}
1498
1499/*
1500 * If this function returns true, this #vmexit was already handled
1501 */
1502static int nested_svm_exit_handled(struct vcpu_svm *svm)
1503{
1504 u32 exit_code = svm->vmcb->control.exit_code;
1505 int vmexit = NESTED_EXIT_HOST;
1506
Alexander Grafcf74a782008-11-25 20:17:08 +01001507 switch (exit_code) {
Joerg Roedel9c4e40b92009-08-07 11:49:36 +02001508 case SVM_EXIT_MSR:
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02001509 vmexit = nested_svm_exit_handled_msr(svm);
Joerg Roedel9c4e40b92009-08-07 11:49:36 +02001510 break;
Alexander Grafcf74a782008-11-25 20:17:08 +01001511 case SVM_EXIT_READ_CR0 ... SVM_EXIT_READ_CR8: {
1512 u32 cr_bits = 1 << (exit_code - SVM_EXIT_READ_CR0);
Joerg Roedelaad42c62009-08-07 11:49:34 +02001513 if (svm->nested.intercept_cr_read & cr_bits)
Joerg Roedel410e4d52009-08-07 11:49:44 +02001514 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01001515 break;
1516 }
1517 case SVM_EXIT_WRITE_CR0 ... SVM_EXIT_WRITE_CR8: {
1518 u32 cr_bits = 1 << (exit_code - SVM_EXIT_WRITE_CR0);
Joerg Roedelaad42c62009-08-07 11:49:34 +02001519 if (svm->nested.intercept_cr_write & cr_bits)
Joerg Roedel410e4d52009-08-07 11:49:44 +02001520 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01001521 break;
1522 }
1523 case SVM_EXIT_READ_DR0 ... SVM_EXIT_READ_DR7: {
1524 u32 dr_bits = 1 << (exit_code - SVM_EXIT_READ_DR0);
Joerg Roedelaad42c62009-08-07 11:49:34 +02001525 if (svm->nested.intercept_dr_read & dr_bits)
Joerg Roedel410e4d52009-08-07 11:49:44 +02001526 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01001527 break;
1528 }
1529 case SVM_EXIT_WRITE_DR0 ... SVM_EXIT_WRITE_DR7: {
1530 u32 dr_bits = 1 << (exit_code - SVM_EXIT_WRITE_DR0);
Joerg Roedelaad42c62009-08-07 11:49:34 +02001531 if (svm->nested.intercept_dr_write & dr_bits)
Joerg Roedel410e4d52009-08-07 11:49:44 +02001532 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01001533 break;
1534 }
1535 case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
1536 u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
Joerg Roedelaad42c62009-08-07 11:49:34 +02001537 if (svm->nested.intercept_exceptions & excp_bits)
Joerg Roedel410e4d52009-08-07 11:49:44 +02001538 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01001539 break;
1540 }
1541 default: {
1542 u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
1543 nsvm_printk("exit code: 0x%x\n", exit_code);
Joerg Roedelaad42c62009-08-07 11:49:34 +02001544 if (svm->nested.intercept & exit_bits)
Joerg Roedel410e4d52009-08-07 11:49:44 +02001545 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01001546 }
1547 }
1548
Joerg Roedel410e4d52009-08-07 11:49:44 +02001549 if (vmexit == NESTED_EXIT_DONE) {
Joerg Roedel9c4e40b92009-08-07 11:49:36 +02001550 nsvm_printk("#VMEXIT reason=%04x\n", exit_code);
1551 nested_svm_vmexit(svm);
1552 }
1553
1554 return vmexit;
Alexander Grafcf74a782008-11-25 20:17:08 +01001555}
1556
Joerg Roedel0460a972009-08-07 11:49:31 +02001557static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb)
1558{
1559 struct vmcb_control_area *dst = &dst_vmcb->control;
1560 struct vmcb_control_area *from = &from_vmcb->control;
1561
1562 dst->intercept_cr_read = from->intercept_cr_read;
1563 dst->intercept_cr_write = from->intercept_cr_write;
1564 dst->intercept_dr_read = from->intercept_dr_read;
1565 dst->intercept_dr_write = from->intercept_dr_write;
1566 dst->intercept_exceptions = from->intercept_exceptions;
1567 dst->intercept = from->intercept;
1568 dst->iopm_base_pa = from->iopm_base_pa;
1569 dst->msrpm_base_pa = from->msrpm_base_pa;
1570 dst->tsc_offset = from->tsc_offset;
1571 dst->asid = from->asid;
1572 dst->tlb_ctl = from->tlb_ctl;
1573 dst->int_ctl = from->int_ctl;
1574 dst->int_vector = from->int_vector;
1575 dst->int_state = from->int_state;
1576 dst->exit_code = from->exit_code;
1577 dst->exit_code_hi = from->exit_code_hi;
1578 dst->exit_info_1 = from->exit_info_1;
1579 dst->exit_info_2 = from->exit_info_2;
1580 dst->exit_int_info = from->exit_int_info;
1581 dst->exit_int_info_err = from->exit_int_info_err;
1582 dst->nested_ctl = from->nested_ctl;
1583 dst->event_inj = from->event_inj;
1584 dst->event_inj_err = from->event_inj_err;
1585 dst->nested_cr3 = from->nested_cr3;
1586 dst->lbr_ctl = from->lbr_ctl;
1587}
1588
Joerg Roedel34f80cf2009-08-07 11:49:38 +02001589static int nested_svm_vmexit(struct vcpu_svm *svm)
Alexander Grafcf74a782008-11-25 20:17:08 +01001590{
Joerg Roedel34f80cf2009-08-07 11:49:38 +02001591 struct vmcb *nested_vmcb;
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001592 struct vmcb *hsave = svm->nested.hsave;
Joerg Roedel33740e42009-08-07 11:49:29 +02001593 struct vmcb *vmcb = svm->vmcb;
Alexander Grafcf74a782008-11-25 20:17:08 +01001594
Joerg Roedel34f80cf2009-08-07 11:49:38 +02001595 nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, KM_USER0);
1596 if (!nested_vmcb)
1597 return 1;
1598
Alexander Grafcf74a782008-11-25 20:17:08 +01001599 /* Give the current vmcb to the guest */
Joerg Roedel33740e42009-08-07 11:49:29 +02001600 disable_gif(svm);
1601
1602 nested_vmcb->save.es = vmcb->save.es;
1603 nested_vmcb->save.cs = vmcb->save.cs;
1604 nested_vmcb->save.ss = vmcb->save.ss;
1605 nested_vmcb->save.ds = vmcb->save.ds;
1606 nested_vmcb->save.gdtr = vmcb->save.gdtr;
1607 nested_vmcb->save.idtr = vmcb->save.idtr;
1608 if (npt_enabled)
1609 nested_vmcb->save.cr3 = vmcb->save.cr3;
1610 nested_vmcb->save.cr2 = vmcb->save.cr2;
1611 nested_vmcb->save.rflags = vmcb->save.rflags;
1612 nested_vmcb->save.rip = vmcb->save.rip;
1613 nested_vmcb->save.rsp = vmcb->save.rsp;
1614 nested_vmcb->save.rax = vmcb->save.rax;
1615 nested_vmcb->save.dr7 = vmcb->save.dr7;
1616 nested_vmcb->save.dr6 = vmcb->save.dr6;
1617 nested_vmcb->save.cpl = vmcb->save.cpl;
1618
1619 nested_vmcb->control.int_ctl = vmcb->control.int_ctl;
1620 nested_vmcb->control.int_vector = vmcb->control.int_vector;
1621 nested_vmcb->control.int_state = vmcb->control.int_state;
1622 nested_vmcb->control.exit_code = vmcb->control.exit_code;
1623 nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi;
1624 nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1;
1625 nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2;
1626 nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info;
1627 nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err;
Alexander Graf8d23c462009-10-09 16:08:25 +02001628
1629 /*
1630 * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have
1631 * to make sure that we do not lose injected events. So check event_inj
1632 * here and copy it to exit_int_info if it is valid.
1633 * Exit_int_info and event_inj can't be both valid because the case
1634 * below only happens on a VMRUN instruction intercept which has
1635 * no valid exit_int_info set.
1636 */
1637 if (vmcb->control.event_inj & SVM_EVTINJ_VALID) {
1638 struct vmcb_control_area *nc = &nested_vmcb->control;
1639
1640 nc->exit_int_info = vmcb->control.event_inj;
1641 nc->exit_int_info_err = vmcb->control.event_inj_err;
1642 }
1643
Joerg Roedel33740e42009-08-07 11:49:29 +02001644 nested_vmcb->control.tlb_ctl = 0;
1645 nested_vmcb->control.event_inj = 0;
1646 nested_vmcb->control.event_inj_err = 0;
Alexander Grafcf74a782008-11-25 20:17:08 +01001647
1648 /* We always set V_INTR_MASKING and remember the old value in hflags */
1649 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
1650 nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;
1651
Alexander Grafcf74a782008-11-25 20:17:08 +01001652 /* Restore the original control entries */
Joerg Roedel0460a972009-08-07 11:49:31 +02001653 copy_vmcb_control_area(vmcb, hsave);
Alexander Grafcf74a782008-11-25 20:17:08 +01001654
1655 /* Kill any pending exceptions */
1656 if (svm->vcpu.arch.exception.pending == true)
1657 nsvm_printk("WARNING: Pending Exception\n");
Joerg Roedel33740e42009-08-07 11:49:29 +02001658
Alexander Graf219b65d2009-06-15 15:21:25 +02001659 kvm_clear_exception_queue(&svm->vcpu);
1660 kvm_clear_interrupt_queue(&svm->vcpu);
Alexander Grafcf74a782008-11-25 20:17:08 +01001661
1662 /* Restore selected save entries */
1663 svm->vmcb->save.es = hsave->save.es;
1664 svm->vmcb->save.cs = hsave->save.cs;
1665 svm->vmcb->save.ss = hsave->save.ss;
1666 svm->vmcb->save.ds = hsave->save.ds;
1667 svm->vmcb->save.gdtr = hsave->save.gdtr;
1668 svm->vmcb->save.idtr = hsave->save.idtr;
1669 svm->vmcb->save.rflags = hsave->save.rflags;
1670 svm_set_efer(&svm->vcpu, hsave->save.efer);
1671 svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE);
1672 svm_set_cr4(&svm->vcpu, hsave->save.cr4);
1673 if (npt_enabled) {
1674 svm->vmcb->save.cr3 = hsave->save.cr3;
1675 svm->vcpu.arch.cr3 = hsave->save.cr3;
1676 } else {
1677 kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
1678 }
1679 kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax);
1680 kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp);
1681 kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip);
1682 svm->vmcb->save.dr7 = 0;
1683 svm->vmcb->save.cpl = 0;
1684 svm->vmcb->control.exit_int_info = 0;
1685
Alexander Grafcf74a782008-11-25 20:17:08 +01001686 /* Exit nested SVM mode */
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001687 svm->nested.vmcb = 0;
Alexander Grafcf74a782008-11-25 20:17:08 +01001688
Joerg Roedel34f80cf2009-08-07 11:49:38 +02001689 nested_svm_unmap(nested_vmcb, KM_USER0);
Alexander Grafcf74a782008-11-25 20:17:08 +01001690
1691 kvm_mmu_reset_context(&svm->vcpu);
1692 kvm_mmu_load(&svm->vcpu);
1693
1694 return 0;
1695}
Alexander Graf3d6368e2008-11-25 20:17:07 +01001696
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001697static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
Alexander Graf3d6368e2008-11-25 20:17:07 +01001698{
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001699 u32 *nested_msrpm;
Alexander Graf3d6368e2008-11-25 20:17:07 +01001700 int i;
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001701
1702 nested_msrpm = nested_svm_map(svm, svm->nested.vmcb_msrpm, KM_USER0);
1703 if (!nested_msrpm)
1704 return false;
1705
Alexander Graf3d6368e2008-11-25 20:17:07 +01001706 for (i=0; i< PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER) / 4; i++)
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001707 svm->nested.msrpm[i] = svm->msrpm[i] | nested_msrpm[i];
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001708
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001709 svm->vmcb->control.msrpm_base_pa = __pa(svm->nested.msrpm);
Alexander Graf3d6368e2008-11-25 20:17:07 +01001710
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001711 nested_svm_unmap(nested_msrpm, KM_USER0);
1712
1713 return true;
Alexander Graf3d6368e2008-11-25 20:17:07 +01001714}
1715
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001716static bool nested_svm_vmrun(struct vcpu_svm *svm)
Alexander Graf3d6368e2008-11-25 20:17:07 +01001717{
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001718 struct vmcb *nested_vmcb;
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001719 struct vmcb *hsave = svm->nested.hsave;
Joerg Roedeldefbba52009-08-07 11:49:30 +02001720 struct vmcb *vmcb = svm->vmcb;
Alexander Graf3d6368e2008-11-25 20:17:07 +01001721
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001722 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, KM_USER0);
1723 if (!nested_vmcb)
1724 return false;
1725
Alexander Graf3d6368e2008-11-25 20:17:07 +01001726 /* nested_vmcb is our indicator if nested SVM is activated */
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001727 svm->nested.vmcb = svm->vmcb->save.rax;
Alexander Graf3d6368e2008-11-25 20:17:07 +01001728
Joerg Roedel0ac406d2009-10-09 16:08:27 +02001729 trace_kvm_nested_vmrun(svm->vmcb->save.rip - 3, svm->nested.vmcb,
1730 nested_vmcb->save.rip,
1731 nested_vmcb->control.int_ctl,
1732 nested_vmcb->control.event_inj,
1733 nested_vmcb->control.nested_ctl);
1734
Alexander Graf3d6368e2008-11-25 20:17:07 +01001735 /* Clear internal status */
Alexander Graf219b65d2009-06-15 15:21:25 +02001736 kvm_clear_exception_queue(&svm->vcpu);
1737 kvm_clear_interrupt_queue(&svm->vcpu);
Alexander Graf3d6368e2008-11-25 20:17:07 +01001738
1739 /* Save the old vmcb, so we don't need to pick what we save, but
1740 can restore everything when a VMEXIT occurs */
Joerg Roedeldefbba52009-08-07 11:49:30 +02001741 hsave->save.es = vmcb->save.es;
1742 hsave->save.cs = vmcb->save.cs;
1743 hsave->save.ss = vmcb->save.ss;
1744 hsave->save.ds = vmcb->save.ds;
1745 hsave->save.gdtr = vmcb->save.gdtr;
1746 hsave->save.idtr = vmcb->save.idtr;
1747 hsave->save.efer = svm->vcpu.arch.shadow_efer;
1748 hsave->save.cr0 = svm->vcpu.arch.cr0;
1749 hsave->save.cr4 = svm->vcpu.arch.cr4;
1750 hsave->save.rflags = vmcb->save.rflags;
1751 hsave->save.rip = svm->next_rip;
1752 hsave->save.rsp = vmcb->save.rsp;
1753 hsave->save.rax = vmcb->save.rax;
1754 if (npt_enabled)
1755 hsave->save.cr3 = vmcb->save.cr3;
1756 else
1757 hsave->save.cr3 = svm->vcpu.arch.cr3;
1758
Joerg Roedel0460a972009-08-07 11:49:31 +02001759 copy_vmcb_control_area(hsave, vmcb);
Alexander Graf3d6368e2008-11-25 20:17:07 +01001760
1761 if (svm->vmcb->save.rflags & X86_EFLAGS_IF)
1762 svm->vcpu.arch.hflags |= HF_HIF_MASK;
1763 else
1764 svm->vcpu.arch.hflags &= ~HF_HIF_MASK;
1765
1766 /* Load the nested guest state */
1767 svm->vmcb->save.es = nested_vmcb->save.es;
1768 svm->vmcb->save.cs = nested_vmcb->save.cs;
1769 svm->vmcb->save.ss = nested_vmcb->save.ss;
1770 svm->vmcb->save.ds = nested_vmcb->save.ds;
1771 svm->vmcb->save.gdtr = nested_vmcb->save.gdtr;
1772 svm->vmcb->save.idtr = nested_vmcb->save.idtr;
1773 svm->vmcb->save.rflags = nested_vmcb->save.rflags;
1774 svm_set_efer(&svm->vcpu, nested_vmcb->save.efer);
1775 svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0);
1776 svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4);
1777 if (npt_enabled) {
1778 svm->vmcb->save.cr3 = nested_vmcb->save.cr3;
1779 svm->vcpu.arch.cr3 = nested_vmcb->save.cr3;
1780 } else {
1781 kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
1782 kvm_mmu_reset_context(&svm->vcpu);
1783 }
Joerg Roedeldefbba52009-08-07 11:49:30 +02001784 svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
Alexander Graf3d6368e2008-11-25 20:17:07 +01001785 kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax);
1786 kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp);
1787 kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip);
1788 /* In case we don't even reach vcpu_run, the fields are not updated */
1789 svm->vmcb->save.rax = nested_vmcb->save.rax;
1790 svm->vmcb->save.rsp = nested_vmcb->save.rsp;
1791 svm->vmcb->save.rip = nested_vmcb->save.rip;
1792 svm->vmcb->save.dr7 = nested_vmcb->save.dr7;
1793 svm->vmcb->save.dr6 = nested_vmcb->save.dr6;
1794 svm->vmcb->save.cpl = nested_vmcb->save.cpl;
1795
1796 /* We don't want a nested guest to be more powerful than the guest,
1797 so all intercepts are ORed */
1798 svm->vmcb->control.intercept_cr_read |=
1799 nested_vmcb->control.intercept_cr_read;
1800 svm->vmcb->control.intercept_cr_write |=
1801 nested_vmcb->control.intercept_cr_write;
1802 svm->vmcb->control.intercept_dr_read |=
1803 nested_vmcb->control.intercept_dr_read;
1804 svm->vmcb->control.intercept_dr_write |=
1805 nested_vmcb->control.intercept_dr_write;
1806 svm->vmcb->control.intercept_exceptions |=
1807 nested_vmcb->control.intercept_exceptions;
1808
1809 svm->vmcb->control.intercept |= nested_vmcb->control.intercept;
1810
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001811 svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa;
Alexander Graf3d6368e2008-11-25 20:17:07 +01001812
Joerg Roedelaad42c62009-08-07 11:49:34 +02001813 /* cache intercepts */
1814 svm->nested.intercept_cr_read = nested_vmcb->control.intercept_cr_read;
1815 svm->nested.intercept_cr_write = nested_vmcb->control.intercept_cr_write;
1816 svm->nested.intercept_dr_read = nested_vmcb->control.intercept_dr_read;
1817 svm->nested.intercept_dr_write = nested_vmcb->control.intercept_dr_write;
1818 svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
1819 svm->nested.intercept = nested_vmcb->control.intercept;
1820
Alexander Graf3d6368e2008-11-25 20:17:07 +01001821 force_new_asid(&svm->vcpu);
Alexander Graf3d6368e2008-11-25 20:17:07 +01001822 svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK;
1823 if (nested_vmcb->control.int_ctl & V_IRQ_MASK) {
1824 nsvm_printk("nSVM Injecting Interrupt: 0x%x\n",
1825 nested_vmcb->control.int_ctl);
1826 }
1827 if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
1828 svm->vcpu.arch.hflags |= HF_VINTR_MASK;
1829 else
1830 svm->vcpu.arch.hflags &= ~HF_VINTR_MASK;
1831
1832 nsvm_printk("nSVM exit_int_info: 0x%x | int_state: 0x%x\n",
1833 nested_vmcb->control.exit_int_info,
1834 nested_vmcb->control.int_state);
1835
1836 svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
1837 svm->vmcb->control.int_state = nested_vmcb->control.int_state;
1838 svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset;
1839 if (nested_vmcb->control.event_inj & SVM_EVTINJ_VALID)
1840 nsvm_printk("Injecting Event: 0x%x\n",
1841 nested_vmcb->control.event_inj);
1842 svm->vmcb->control.event_inj = nested_vmcb->control.event_inj;
1843 svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err;
1844
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001845 nested_svm_unmap(nested_vmcb, KM_USER0);
1846
Joerg Roedel2af91942009-08-07 11:49:28 +02001847 enable_gif(svm);
Alexander Graf3d6368e2008-11-25 20:17:07 +01001848
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001849 return true;
Alexander Graf3d6368e2008-11-25 20:17:07 +01001850}
1851
Joerg Roedel9966bf62009-08-07 11:49:40 +02001852static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
Alexander Graf55426752008-11-25 20:17:06 +01001853{
1854 to_vmcb->save.fs = from_vmcb->save.fs;
1855 to_vmcb->save.gs = from_vmcb->save.gs;
1856 to_vmcb->save.tr = from_vmcb->save.tr;
1857 to_vmcb->save.ldtr = from_vmcb->save.ldtr;
1858 to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base;
1859 to_vmcb->save.star = from_vmcb->save.star;
1860 to_vmcb->save.lstar = from_vmcb->save.lstar;
1861 to_vmcb->save.cstar = from_vmcb->save.cstar;
1862 to_vmcb->save.sfmask = from_vmcb->save.sfmask;
1863 to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs;
1864 to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp;
1865 to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip;
Alexander Graf55426752008-11-25 20:17:06 +01001866}
1867
Avi Kivity851ba692009-08-24 11:10:17 +03001868static int vmload_interception(struct vcpu_svm *svm)
Alexander Graf55426752008-11-25 20:17:06 +01001869{
Joerg Roedel9966bf62009-08-07 11:49:40 +02001870 struct vmcb *nested_vmcb;
1871
Alexander Graf55426752008-11-25 20:17:06 +01001872 if (nested_svm_check_permissions(svm))
1873 return 1;
1874
1875 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
1876 skip_emulated_instruction(&svm->vcpu);
1877
Joerg Roedel9966bf62009-08-07 11:49:40 +02001878 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, KM_USER0);
1879 if (!nested_vmcb)
1880 return 1;
1881
1882 nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
1883 nested_svm_unmap(nested_vmcb, KM_USER0);
Alexander Graf55426752008-11-25 20:17:06 +01001884
1885 return 1;
1886}
1887
Avi Kivity851ba692009-08-24 11:10:17 +03001888static int vmsave_interception(struct vcpu_svm *svm)
Alexander Graf55426752008-11-25 20:17:06 +01001889{
Joerg Roedel9966bf62009-08-07 11:49:40 +02001890 struct vmcb *nested_vmcb;
1891
Alexander Graf55426752008-11-25 20:17:06 +01001892 if (nested_svm_check_permissions(svm))
1893 return 1;
1894
1895 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
1896 skip_emulated_instruction(&svm->vcpu);
1897
Joerg Roedel9966bf62009-08-07 11:49:40 +02001898 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, KM_USER0);
1899 if (!nested_vmcb)
1900 return 1;
1901
1902 nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
1903 nested_svm_unmap(nested_vmcb, KM_USER0);
Alexander Graf55426752008-11-25 20:17:06 +01001904
1905 return 1;
1906}
1907
Avi Kivity851ba692009-08-24 11:10:17 +03001908static int vmrun_interception(struct vcpu_svm *svm)
Alexander Graf3d6368e2008-11-25 20:17:07 +01001909{
1910 nsvm_printk("VMrun\n");
Joerg Roedel1f8da472009-08-07 11:49:43 +02001911
Alexander Graf3d6368e2008-11-25 20:17:07 +01001912 if (nested_svm_check_permissions(svm))
1913 return 1;
1914
1915 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
1916 skip_emulated_instruction(&svm->vcpu);
1917
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001918 if (!nested_svm_vmrun(svm))
Alexander Graf3d6368e2008-11-25 20:17:07 +01001919 return 1;
1920
Joerg Roedel9738b2c2009-08-07 11:49:41 +02001921 if (!nested_svm_vmrun_msrpm(svm))
Joerg Roedel1f8da472009-08-07 11:49:43 +02001922 goto failed;
1923
1924 return 1;
1925
1926failed:
1927
1928 svm->vmcb->control.exit_code = SVM_EXIT_ERR;
1929 svm->vmcb->control.exit_code_hi = 0;
1930 svm->vmcb->control.exit_info_1 = 0;
1931 svm->vmcb->control.exit_info_2 = 0;
1932
1933 nested_svm_vmexit(svm);
Alexander Graf3d6368e2008-11-25 20:17:07 +01001934
1935 return 1;
1936}
1937
Avi Kivity851ba692009-08-24 11:10:17 +03001938static int stgi_interception(struct vcpu_svm *svm)
Alexander Graf1371d902008-11-25 20:17:04 +01001939{
1940 if (nested_svm_check_permissions(svm))
1941 return 1;
1942
1943 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
1944 skip_emulated_instruction(&svm->vcpu);
1945
Joerg Roedel2af91942009-08-07 11:49:28 +02001946 enable_gif(svm);
Alexander Graf1371d902008-11-25 20:17:04 +01001947
1948 return 1;
1949}
1950
Avi Kivity851ba692009-08-24 11:10:17 +03001951static int clgi_interception(struct vcpu_svm *svm)
Alexander Graf1371d902008-11-25 20:17:04 +01001952{
1953 if (nested_svm_check_permissions(svm))
1954 return 1;
1955
1956 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
1957 skip_emulated_instruction(&svm->vcpu);
1958
Joerg Roedel2af91942009-08-07 11:49:28 +02001959 disable_gif(svm);
Alexander Graf1371d902008-11-25 20:17:04 +01001960
1961 /* After a CLGI no interrupts should come */
1962 svm_clear_vintr(svm);
1963 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
1964
1965 return 1;
1966}
1967
Avi Kivity851ba692009-08-24 11:10:17 +03001968static int invlpga_interception(struct vcpu_svm *svm)
Alexander Grafff092382009-06-15 15:21:24 +02001969{
1970 struct kvm_vcpu *vcpu = &svm->vcpu;
1971 nsvm_printk("INVLPGA\n");
1972
1973 /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
1974 kvm_mmu_invlpg(vcpu, vcpu->arch.regs[VCPU_REGS_RAX]);
1975
1976 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
1977 skip_emulated_instruction(&svm->vcpu);
1978 return 1;
1979}
1980
Avi Kivity851ba692009-08-24 11:10:17 +03001981static int invalid_op_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001982{
Avi Kivity7ee5d9402007-11-25 15:22:50 +02001983 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001984 return 1;
1985}
1986
Avi Kivity851ba692009-08-24 11:10:17 +03001987static int task_switch_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001988{
Izik Eidus37817f22008-03-24 23:14:53 +02001989 u16 tss_selector;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03001990 int reason;
1991 int int_type = svm->vmcb->control.exit_int_info &
1992 SVM_EXITINTINFO_TYPE_MASK;
Gleb Natapov8317c292009-04-12 13:37:02 +03001993 int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03001994 uint32_t type =
1995 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK;
1996 uint32_t idt_v =
1997 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID;
Izik Eidus37817f22008-03-24 23:14:53 +02001998
1999 tss_selector = (u16)svm->vmcb->control.exit_info_1;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002000
Izik Eidus37817f22008-03-24 23:14:53 +02002001 if (svm->vmcb->control.exit_info_2 &
2002 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002003 reason = TASK_SWITCH_IRET;
2004 else if (svm->vmcb->control.exit_info_2 &
2005 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
2006 reason = TASK_SWITCH_JMP;
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03002007 else if (idt_v)
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002008 reason = TASK_SWITCH_GATE;
2009 else
2010 reason = TASK_SWITCH_CALL;
2011
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03002012 if (reason == TASK_SWITCH_GATE) {
2013 switch (type) {
2014 case SVM_EXITINTINFO_TYPE_NMI:
2015 svm->vcpu.arch.nmi_injected = false;
2016 break;
2017 case SVM_EXITINTINFO_TYPE_EXEPT:
2018 kvm_clear_exception_queue(&svm->vcpu);
2019 break;
2020 case SVM_EXITINTINFO_TYPE_INTR:
2021 kvm_clear_interrupt_queue(&svm->vcpu);
2022 break;
2023 default:
2024 break;
2025 }
2026 }
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002027
Gleb Natapov8317c292009-04-12 13:37:02 +03002028 if (reason != TASK_SWITCH_GATE ||
2029 int_type == SVM_EXITINTINFO_TYPE_SOFT ||
2030 (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
Gleb Natapovf629cf82009-05-11 13:35:49 +03002031 (int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
2032 skip_emulated_instruction(&svm->vcpu);
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002033
2034 return kvm_task_switch(&svm->vcpu, tss_selector, reason);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002035}
2036
Avi Kivity851ba692009-08-24 11:10:17 +03002037static int cpuid_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002038{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002039 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
Rusty Russelle756fc62007-07-30 20:07:08 +10002040 kvm_emulate_cpuid(&svm->vcpu);
Avi Kivity06465c52007-02-28 20:46:53 +02002041 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002042}
2043
Avi Kivity851ba692009-08-24 11:10:17 +03002044static int iret_interception(struct vcpu_svm *svm)
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002045{
2046 ++svm->vcpu.stat.nmi_window_exits;
2047 svm->vmcb->control.intercept &= ~(1UL << INTERCEPT_IRET);
Gleb Natapov44c11432009-05-11 13:35:52 +03002048 svm->vcpu.arch.hflags |= HF_IRET_MASK;
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002049 return 1;
2050}
2051
Avi Kivity851ba692009-08-24 11:10:17 +03002052static int invlpg_interception(struct vcpu_svm *svm)
Marcelo Tosattia7052892008-09-23 13:18:35 -03002053{
Avi Kivity851ba692009-08-24 11:10:17 +03002054 if (emulate_instruction(&svm->vcpu, 0, 0, 0) != EMULATE_DONE)
Marcelo Tosattia7052892008-09-23 13:18:35 -03002055 pr_unimpl(&svm->vcpu, "%s: failed\n", __func__);
2056 return 1;
2057}
2058
Avi Kivity851ba692009-08-24 11:10:17 +03002059static int emulate_on_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002060{
Avi Kivity851ba692009-08-24 11:10:17 +03002061 if (emulate_instruction(&svm->vcpu, 0, 0, 0) != EMULATE_DONE)
Harvey Harrisonb8688d52008-03-03 12:59:56 -08002062 pr_unimpl(&svm->vcpu, "%s: failed\n", __func__);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002063 return 1;
2064}
2065
Avi Kivity851ba692009-08-24 11:10:17 +03002066static int cr8_write_interception(struct vcpu_svm *svm)
Joerg Roedel1d075432007-12-06 21:02:25 +01002067{
Avi Kivity851ba692009-08-24 11:10:17 +03002068 struct kvm_run *kvm_run = svm->vcpu.run;
2069
Gleb Natapov0a5fff192009-04-21 17:45:06 +03002070 u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
2071 /* instruction emulation calls kvm_set_cr8() */
Avi Kivity851ba692009-08-24 11:10:17 +03002072 emulate_instruction(&svm->vcpu, 0, 0, 0);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002073 if (irqchip_in_kernel(svm->vcpu.kvm)) {
2074 svm->vmcb->control.intercept_cr_write &= ~INTERCEPT_CR8_MASK;
Joerg Roedel1d075432007-12-06 21:02:25 +01002075 return 1;
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002076 }
Gleb Natapov0a5fff192009-04-21 17:45:06 +03002077 if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
2078 return 1;
Joerg Roedel1d075432007-12-06 21:02:25 +01002079 kvm_run->exit_reason = KVM_EXIT_SET_TPR;
2080 return 0;
2081}
2082
Avi Kivity6aa8b732006-12-10 02:21:36 -08002083static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
2084{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002085 struct vcpu_svm *svm = to_svm(vcpu);
2086
Avi Kivity6aa8b732006-12-10 02:21:36 -08002087 switch (ecx) {
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05302088 case MSR_IA32_TSC: {
Joerg Roedel20824f32009-09-16 15:24:18 +02002089 u64 tsc_offset;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002090
Joerg Roedel20824f32009-09-16 15:24:18 +02002091 if (is_nested(svm))
2092 tsc_offset = svm->nested.hsave->control.tsc_offset;
2093 else
2094 tsc_offset = svm->vmcb->control.tsc_offset;
2095
2096 *data = tsc_offset + native_read_tsc();
Avi Kivity6aa8b732006-12-10 02:21:36 -08002097 break;
2098 }
Avi Kivity0e859ca2006-12-22 01:05:08 -08002099 case MSR_K6_STAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002100 *data = svm->vmcb->save.star;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002101 break;
Avi Kivity0e859ca2006-12-22 01:05:08 -08002102#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08002103 case MSR_LSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002104 *data = svm->vmcb->save.lstar;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002105 break;
2106 case MSR_CSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002107 *data = svm->vmcb->save.cstar;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002108 break;
2109 case MSR_KERNEL_GS_BASE:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002110 *data = svm->vmcb->save.kernel_gs_base;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002111 break;
2112 case MSR_SYSCALL_MASK:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002113 *data = svm->vmcb->save.sfmask;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002114 break;
2115#endif
2116 case MSR_IA32_SYSENTER_CS:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002117 *data = svm->vmcb->save.sysenter_cs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002118 break;
2119 case MSR_IA32_SYSENTER_EIP:
Andre Przywara017cb992009-05-28 11:56:31 +02002120 *data = svm->sysenter_eip;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002121 break;
2122 case MSR_IA32_SYSENTER_ESP:
Andre Przywara017cb992009-05-28 11:56:31 +02002123 *data = svm->sysenter_esp;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002124 break;
Joerg Roedela2938c82008-02-13 16:30:28 +01002125 /* Nobody will change the following 5 values in the VMCB so
2126 we can safely return them on rdmsr. They will always be 0
2127 until LBRV is implemented. */
2128 case MSR_IA32_DEBUGCTLMSR:
2129 *data = svm->vmcb->save.dbgctl;
2130 break;
2131 case MSR_IA32_LASTBRANCHFROMIP:
2132 *data = svm->vmcb->save.br_from;
2133 break;
2134 case MSR_IA32_LASTBRANCHTOIP:
2135 *data = svm->vmcb->save.br_to;
2136 break;
2137 case MSR_IA32_LASTINTFROMIP:
2138 *data = svm->vmcb->save.last_excp_from;
2139 break;
2140 case MSR_IA32_LASTINTTOIP:
2141 *data = svm->vmcb->save.last_excp_to;
2142 break;
Alexander Grafb286d5d2008-11-25 20:17:05 +01002143 case MSR_VM_HSAVE_PA:
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02002144 *data = svm->nested.hsave_msr;
Alexander Grafb286d5d2008-11-25 20:17:05 +01002145 break;
Joerg Roedeleb6f3022008-11-25 20:17:09 +01002146 case MSR_VM_CR:
2147 *data = 0;
2148 break;
Alexander Grafc8a73f12009-01-05 16:02:47 +01002149 case MSR_IA32_UCODE_REV:
2150 *data = 0x01000065;
2151 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002152 default:
Avi Kivity3bab1f52006-12-29 16:49:48 -08002153 return kvm_get_msr_common(vcpu, ecx, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002154 }
2155 return 0;
2156}
2157
Avi Kivity851ba692009-08-24 11:10:17 +03002158static int rdmsr_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002159{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002160 u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX];
Avi Kivity6aa8b732006-12-10 02:21:36 -08002161 u64 data;
2162
Rusty Russelle756fc62007-07-30 20:07:08 +10002163 if (svm_get_msr(&svm->vcpu, ecx, &data))
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02002164 kvm_inject_gp(&svm->vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002165 else {
Marcelo Tosatti229456f2009-06-17 09:22:14 -03002166 trace_kvm_msr_read(ecx, data);
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02002167
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002168 svm->vcpu.arch.regs[VCPU_REGS_RAX] = data & 0xffffffff;
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002169 svm->vcpu.arch.regs[VCPU_REGS_RDX] = data >> 32;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002170 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
Rusty Russelle756fc62007-07-30 20:07:08 +10002171 skip_emulated_instruction(&svm->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002172 }
2173 return 1;
2174}
2175
2176static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
2177{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002178 struct vcpu_svm *svm = to_svm(vcpu);
2179
Avi Kivity6aa8b732006-12-10 02:21:36 -08002180 switch (ecx) {
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05302181 case MSR_IA32_TSC: {
Joerg Roedel20824f32009-09-16 15:24:18 +02002182 u64 tsc_offset = data - native_read_tsc();
2183 u64 g_tsc_offset = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002184
Joerg Roedel20824f32009-09-16 15:24:18 +02002185 if (is_nested(svm)) {
2186 g_tsc_offset = svm->vmcb->control.tsc_offset -
2187 svm->nested.hsave->control.tsc_offset;
2188 svm->nested.hsave->control.tsc_offset = tsc_offset;
2189 }
2190
2191 svm->vmcb->control.tsc_offset = tsc_offset + g_tsc_offset;
2192
Avi Kivity6aa8b732006-12-10 02:21:36 -08002193 break;
2194 }
Avi Kivity0e859ca2006-12-22 01:05:08 -08002195 case MSR_K6_STAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002196 svm->vmcb->save.star = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002197 break;
Robert P. J. Day49b14f22007-01-29 13:19:50 -08002198#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08002199 case MSR_LSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002200 svm->vmcb->save.lstar = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002201 break;
2202 case MSR_CSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002203 svm->vmcb->save.cstar = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002204 break;
2205 case MSR_KERNEL_GS_BASE:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002206 svm->vmcb->save.kernel_gs_base = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002207 break;
2208 case MSR_SYSCALL_MASK:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002209 svm->vmcb->save.sfmask = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002210 break;
2211#endif
2212 case MSR_IA32_SYSENTER_CS:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002213 svm->vmcb->save.sysenter_cs = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002214 break;
2215 case MSR_IA32_SYSENTER_EIP:
Andre Przywara017cb992009-05-28 11:56:31 +02002216 svm->sysenter_eip = data;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002217 svm->vmcb->save.sysenter_eip = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002218 break;
2219 case MSR_IA32_SYSENTER_ESP:
Andre Przywara017cb992009-05-28 11:56:31 +02002220 svm->sysenter_esp = data;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002221 svm->vmcb->save.sysenter_esp = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002222 break;
Joerg Roedela2938c82008-02-13 16:30:28 +01002223 case MSR_IA32_DEBUGCTLMSR:
Joerg Roedel24e09cb2008-02-13 18:58:47 +01002224 if (!svm_has(SVM_FEATURE_LBRV)) {
2225 pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
Harvey Harrisonb8688d52008-03-03 12:59:56 -08002226 __func__, data);
Joerg Roedel24e09cb2008-02-13 18:58:47 +01002227 break;
2228 }
2229 if (data & DEBUGCTL_RESERVED_BITS)
2230 return 1;
2231
2232 svm->vmcb->save.dbgctl = data;
2233 if (data & (1ULL<<0))
2234 svm_enable_lbrv(svm);
2235 else
2236 svm_disable_lbrv(svm);
Joerg Roedela2938c82008-02-13 16:30:28 +01002237 break;
Alexander Grafb286d5d2008-11-25 20:17:05 +01002238 case MSR_VM_HSAVE_PA:
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02002239 svm->nested.hsave_msr = data;
Alexander Grafb286d5d2008-11-25 20:17:05 +01002240 break;
Alexander Graf3c5d0a42009-06-15 15:21:23 +02002241 case MSR_VM_CR:
2242 case MSR_VM_IGNNE:
Alexander Graf3c5d0a42009-06-15 15:21:23 +02002243 pr_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
2244 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002245 default:
Avi Kivity3bab1f52006-12-29 16:49:48 -08002246 return kvm_set_msr_common(vcpu, ecx, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002247 }
2248 return 0;
2249}
2250
Avi Kivity851ba692009-08-24 11:10:17 +03002251static int wrmsr_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002252{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002253 u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX];
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002254 u64 data = (svm->vcpu.arch.regs[VCPU_REGS_RAX] & -1u)
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002255 | ((u64)(svm->vcpu.arch.regs[VCPU_REGS_RDX] & -1u) << 32);
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02002256
Marcelo Tosatti229456f2009-06-17 09:22:14 -03002257 trace_kvm_msr_write(ecx, data);
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02002258
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002259 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
Rusty Russelle756fc62007-07-30 20:07:08 +10002260 if (svm_set_msr(&svm->vcpu, ecx, data))
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02002261 kvm_inject_gp(&svm->vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002262 else
Rusty Russelle756fc62007-07-30 20:07:08 +10002263 skip_emulated_instruction(&svm->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002264 return 1;
2265}
2266
Avi Kivity851ba692009-08-24 11:10:17 +03002267static int msr_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002268{
Rusty Russelle756fc62007-07-30 20:07:08 +10002269 if (svm->vmcb->control.exit_info_1)
Avi Kivity851ba692009-08-24 11:10:17 +03002270 return wrmsr_interception(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002271 else
Avi Kivity851ba692009-08-24 11:10:17 +03002272 return rdmsr_interception(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002273}
2274
Avi Kivity851ba692009-08-24 11:10:17 +03002275static int interrupt_window_interception(struct vcpu_svm *svm)
Dor Laorc1150d82007-01-05 16:36:24 -08002276{
Avi Kivity851ba692009-08-24 11:10:17 +03002277 struct kvm_run *kvm_run = svm->vcpu.run;
2278
Alexander Graff0b85052008-11-25 20:17:01 +01002279 svm_clear_vintr(svm);
Eddie Dong85f455f2007-07-06 12:20:49 +03002280 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
Dor Laorc1150d82007-01-05 16:36:24 -08002281 /*
2282 * If the user space waits to inject interrupts, exit as soon as
2283 * possible
2284 */
Gleb Natapov80618232009-04-21 17:44:56 +03002285 if (!irqchip_in_kernel(svm->vcpu.kvm) &&
2286 kvm_run->request_interrupt_window &&
2287 !kvm_cpu_has_interrupt(&svm->vcpu)) {
Rusty Russelle756fc62007-07-30 20:07:08 +10002288 ++svm->vcpu.stat.irq_window_exits;
Dor Laorc1150d82007-01-05 16:36:24 -08002289 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
2290 return 0;
2291 }
2292
2293 return 1;
2294}
2295
Avi Kivity851ba692009-08-24 11:10:17 +03002296static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08002297 [SVM_EXIT_READ_CR0] = emulate_on_interception,
2298 [SVM_EXIT_READ_CR3] = emulate_on_interception,
2299 [SVM_EXIT_READ_CR4] = emulate_on_interception,
Avi Kivity80a81192007-12-06 19:50:00 +02002300 [SVM_EXIT_READ_CR8] = emulate_on_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002301 /* for now: */
2302 [SVM_EXIT_WRITE_CR0] = emulate_on_interception,
2303 [SVM_EXIT_WRITE_CR3] = emulate_on_interception,
2304 [SVM_EXIT_WRITE_CR4] = emulate_on_interception,
Joerg Roedel1d075432007-12-06 21:02:25 +01002305 [SVM_EXIT_WRITE_CR8] = cr8_write_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002306 [SVM_EXIT_READ_DR0] = emulate_on_interception,
2307 [SVM_EXIT_READ_DR1] = emulate_on_interception,
2308 [SVM_EXIT_READ_DR2] = emulate_on_interception,
2309 [SVM_EXIT_READ_DR3] = emulate_on_interception,
2310 [SVM_EXIT_WRITE_DR0] = emulate_on_interception,
2311 [SVM_EXIT_WRITE_DR1] = emulate_on_interception,
2312 [SVM_EXIT_WRITE_DR2] = emulate_on_interception,
2313 [SVM_EXIT_WRITE_DR3] = emulate_on_interception,
2314 [SVM_EXIT_WRITE_DR5] = emulate_on_interception,
2315 [SVM_EXIT_WRITE_DR7] = emulate_on_interception,
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002316 [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception,
2317 [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception,
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05002318 [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002319 [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception,
Anthony Liguori7807fa62007-04-23 09:17:21 -05002320 [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception,
Joerg Roedel53371b52008-04-09 14:15:30 +02002321 [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception,
Joerg Roedela0698052008-04-30 17:56:01 +02002322 [SVM_EXIT_INTR] = intr_interception,
Joerg Roedelc47f0982008-04-30 17:56:00 +02002323 [SVM_EXIT_NMI] = nmi_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002324 [SVM_EXIT_SMI] = nop_on_interception,
2325 [SVM_EXIT_INIT] = nop_on_interception,
Dor Laorc1150d82007-01-05 16:36:24 -08002326 [SVM_EXIT_VINTR] = interrupt_window_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002327 /* [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception, */
2328 [SVM_EXIT_CPUID] = cpuid_interception,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002329 [SVM_EXIT_IRET] = iret_interception,
Avi Kivitycf5a94d2007-10-28 16:11:58 +02002330 [SVM_EXIT_INVD] = emulate_on_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002331 [SVM_EXIT_HLT] = halt_interception,
Marcelo Tosattia7052892008-09-23 13:18:35 -03002332 [SVM_EXIT_INVLPG] = invlpg_interception,
Alexander Grafff092382009-06-15 15:21:24 +02002333 [SVM_EXIT_INVLPGA] = invlpga_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002334 [SVM_EXIT_IOIO] = io_interception,
2335 [SVM_EXIT_MSR] = msr_interception,
2336 [SVM_EXIT_TASK_SWITCH] = task_switch_interception,
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08002337 [SVM_EXIT_SHUTDOWN] = shutdown_interception,
Alexander Graf3d6368e2008-11-25 20:17:07 +01002338 [SVM_EXIT_VMRUN] = vmrun_interception,
Avi Kivity02e235b2007-02-19 14:37:47 +02002339 [SVM_EXIT_VMMCALL] = vmmcall_interception,
Alexander Graf55426752008-11-25 20:17:06 +01002340 [SVM_EXIT_VMLOAD] = vmload_interception,
2341 [SVM_EXIT_VMSAVE] = vmsave_interception,
Alexander Graf1371d902008-11-25 20:17:04 +01002342 [SVM_EXIT_STGI] = stgi_interception,
2343 [SVM_EXIT_CLGI] = clgi_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002344 [SVM_EXIT_SKINIT] = invalid_op_interception,
Avi Kivitycf5a94d2007-10-28 16:11:58 +02002345 [SVM_EXIT_WBINVD] = emulate_on_interception,
Joerg Roedel916ce232007-03-21 19:47:00 +01002346 [SVM_EXIT_MONITOR] = invalid_op_interception,
2347 [SVM_EXIT_MWAIT] = invalid_op_interception,
Joerg Roedel709ddeb2008-02-07 13:47:45 +01002348 [SVM_EXIT_NPF] = pf_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002349};
2350
Avi Kivity851ba692009-08-24 11:10:17 +03002351static int handle_exit(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002352{
Avi Kivity04d2cc72007-09-10 18:10:54 +03002353 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivity851ba692009-08-24 11:10:17 +03002354 struct kvm_run *kvm_run = vcpu->run;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002355 u32 exit_code = svm->vmcb->control.exit_code;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002356
Marcelo Tosatti229456f2009-06-17 09:22:14 -03002357 trace_kvm_exit(exit_code, svm->vmcb->save.rip);
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02002358
Joerg Roedelcd3ff652009-10-09 16:08:26 +02002359 if (unlikely(svm->nested.exit_required)) {
2360 nested_svm_vmexit(svm);
2361 svm->nested.exit_required = false;
2362
2363 return 1;
2364 }
2365
Alexander Grafcf74a782008-11-25 20:17:08 +01002366 if (is_nested(svm)) {
Joerg Roedel410e4d52009-08-07 11:49:44 +02002367 int vmexit;
2368
Alexander Grafcf74a782008-11-25 20:17:08 +01002369 nsvm_printk("nested handle_exit: 0x%x | 0x%lx | 0x%lx | 0x%lx\n",
2370 exit_code, svm->vmcb->control.exit_info_1,
2371 svm->vmcb->control.exit_info_2, svm->vmcb->save.rip);
Joerg Roedel410e4d52009-08-07 11:49:44 +02002372
2373 vmexit = nested_svm_exit_special(svm);
2374
2375 if (vmexit == NESTED_EXIT_CONTINUE)
2376 vmexit = nested_svm_exit_handled(svm);
2377
2378 if (vmexit == NESTED_EXIT_DONE)
Alexander Grafcf74a782008-11-25 20:17:08 +01002379 return 1;
Alexander Grafcf74a782008-11-25 20:17:08 +01002380 }
2381
Joerg Roedela5c38322009-08-07 11:49:32 +02002382 svm_complete_interrupts(svm);
2383
Joerg Roedel709ddeb2008-02-07 13:47:45 +01002384 if (npt_enabled) {
2385 int mmu_reload = 0;
2386 if ((vcpu->arch.cr0 ^ svm->vmcb->save.cr0) & X86_CR0_PG) {
2387 svm_set_cr0(vcpu, svm->vmcb->save.cr0);
2388 mmu_reload = 1;
2389 }
2390 vcpu->arch.cr0 = svm->vmcb->save.cr0;
2391 vcpu->arch.cr3 = svm->vmcb->save.cr3;
Joerg Roedel709ddeb2008-02-07 13:47:45 +01002392 if (mmu_reload) {
2393 kvm_mmu_reset_context(vcpu);
2394 kvm_mmu_load(vcpu);
2395 }
2396 }
2397
Avi Kivity04d2cc72007-09-10 18:10:54 +03002398
2399 if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
2400 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
2401 kvm_run->fail_entry.hardware_entry_failure_reason
2402 = svm->vmcb->control.exit_code;
2403 return 0;
2404 }
2405
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002406 if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
Joerg Roedel709ddeb2008-02-07 13:47:45 +01002407 exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03002408 exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002409 printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "
2410 "exit_code 0x%x\n",
Harvey Harrisonb8688d52008-03-03 12:59:56 -08002411 __func__, svm->vmcb->control.exit_int_info,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002412 exit_code);
2413
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +02002414 if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
Joe Perches56919c52007-11-12 20:06:51 -08002415 || !svm_exit_handlers[exit_code]) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08002416 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
Avi Kivity364b6252007-04-16 14:28:40 +03002417 kvm_run->hw.hardware_exit_reason = exit_code;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002418 return 0;
2419 }
2420
Avi Kivity851ba692009-08-24 11:10:17 +03002421 return svm_exit_handlers[exit_code](svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002422}
2423
2424static void reload_tss(struct kvm_vcpu *vcpu)
2425{
2426 int cpu = raw_smp_processor_id();
2427
2428 struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
Mike Dayd77c26f2007-10-08 09:02:08 -04002429 svm_data->tss_desc->type = 9; /* available 32/64-bit TSS */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002430 load_TR_desc();
2431}
2432
Rusty Russelle756fc62007-07-30 20:07:08 +10002433static void pre_svm_run(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002434{
2435 int cpu = raw_smp_processor_id();
2436
2437 struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
2438
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002439 svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
Marcelo Tosatti4b656b12009-07-21 12:47:45 -03002440 /* FIXME: handle wraparound of asid_generation */
2441 if (svm->asid_generation != svm_data->asid_generation)
Rusty Russelle756fc62007-07-30 20:07:08 +10002442 new_asid(svm, svm_data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002443}
2444
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002445static void svm_inject_nmi(struct kvm_vcpu *vcpu)
2446{
2447 struct vcpu_svm *svm = to_svm(vcpu);
2448
2449 svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI;
2450 vcpu->arch.hflags |= HF_NMI_MASK;
2451 svm->vmcb->control.intercept |= (1UL << INTERCEPT_IRET);
2452 ++vcpu->stat.nmi_injections;
2453}
Avi Kivity6aa8b732006-12-10 02:21:36 -08002454
Eddie Dong85f455f2007-07-06 12:20:49 +03002455static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002456{
2457 struct vmcb_control_area *control;
2458
Marcelo Tosatti229456f2009-06-17 09:22:14 -03002459 trace_kvm_inj_virq(irq);
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02002460
Avi Kivityfa89a812008-09-01 15:57:51 +03002461 ++svm->vcpu.stat.irq_injections;
Rusty Russelle756fc62007-07-30 20:07:08 +10002462 control = &svm->vmcb->control;
Eddie Dong85f455f2007-07-06 12:20:49 +03002463 control->int_vector = irq;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002464 control->int_ctl &= ~V_INTR_PRIO_MASK;
2465 control->int_ctl |= V_IRQ_MASK |
2466 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
2467}
2468
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002469static void svm_set_irq(struct kvm_vcpu *vcpu)
Eddie Dong2a8067f2007-08-06 16:29:07 +03002470{
2471 struct vcpu_svm *svm = to_svm(vcpu);
2472
Joerg Roedel2af91942009-08-07 11:49:28 +02002473 BUG_ON(!(gif_set(svm)));
Alexander Grafcf74a782008-11-25 20:17:08 +01002474
Alexander Graf219b65d2009-06-15 15:21:25 +02002475 svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
2476 SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
Eddie Dong2a8067f2007-08-06 16:29:07 +03002477}
2478
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002479static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
2480{
2481 struct vcpu_svm *svm = to_svm(vcpu);
2482
2483 if (irr == -1)
2484 return;
2485
2486 if (tpr >= irr)
2487 svm->vmcb->control.intercept_cr_write |= INTERCEPT_CR8_MASK;
2488}
2489
2490static int svm_nmi_allowed(struct kvm_vcpu *vcpu)
Joerg Roedelaaacfc92008-04-16 16:51:18 +02002491{
2492 struct vcpu_svm *svm = to_svm(vcpu);
2493 struct vmcb *vmcb = svm->vmcb;
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002494 return !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
2495 !(svm->vcpu.arch.hflags & HF_NMI_MASK);
Joerg Roedelaaacfc92008-04-16 16:51:18 +02002496}
2497
Gleb Natapov78646122009-03-23 12:12:11 +02002498static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
2499{
2500 struct vcpu_svm *svm = to_svm(vcpu);
2501 struct vmcb *vmcb = svm->vmcb;
Joerg Roedel7fcdb512009-09-16 15:24:15 +02002502 int ret;
2503
2504 if (!gif_set(svm) ||
2505 (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK))
2506 return 0;
2507
2508 ret = !!(vmcb->save.rflags & X86_EFLAGS_IF);
2509
2510 if (is_nested(svm))
2511 return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);
2512
2513 return ret;
Gleb Natapov78646122009-03-23 12:12:11 +02002514}
2515
Gleb Natapov9222be12009-04-23 17:14:37 +03002516static void enable_irq_window(struct kvm_vcpu *vcpu)
2517{
Alexander Graf219b65d2009-06-15 15:21:25 +02002518 struct vcpu_svm *svm = to_svm(vcpu);
2519 nsvm_printk("Trying to open IRQ window\n");
2520
2521 nested_svm_intr(svm);
2522
2523 /* In case GIF=0 we can't rely on the CPU to tell us when
2524 * GIF becomes 1, because that's a separate STGI/VMRUN intercept.
2525 * The next time we get that intercept, this function will be
2526 * called again though and we'll get the vintr intercept. */
Joerg Roedel2af91942009-08-07 11:49:28 +02002527 if (gif_set(svm)) {
Alexander Graf219b65d2009-06-15 15:21:25 +02002528 svm_set_vintr(svm);
2529 svm_inject_irq(svm, 0x0);
2530 }
Gleb Natapov9222be12009-04-23 17:14:37 +03002531}
2532
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002533static void enable_nmi_window(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002534{
Avi Kivity04d2cc72007-09-10 18:10:54 +03002535 struct vcpu_svm *svm = to_svm(vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03002536
Gleb Natapov44c11432009-05-11 13:35:52 +03002537 if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
2538 == HF_NMI_MASK)
2539 return; /* IRET will cause a vm exit */
2540
2541 /* Something prevents NMI from been injected. Single step over
2542 possible problem (IRET or exception injection or interrupt
2543 shadow) */
2544 vcpu->arch.singlestep = true;
2545 svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
2546 update_db_intercept(vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03002547}
2548
Izik Eiduscbc94022007-10-25 00:29:55 +02002549static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
2550{
2551 return 0;
2552}
2553
Avi Kivityd9e368d2007-06-07 19:18:30 +03002554static void svm_flush_tlb(struct kvm_vcpu *vcpu)
2555{
2556 force_new_asid(vcpu);
2557}
2558
Avi Kivity04d2cc72007-09-10 18:10:54 +03002559static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
2560{
2561}
2562
Joerg Roedeld7bf8222008-04-16 16:51:17 +02002563static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
2564{
2565 struct vcpu_svm *svm = to_svm(vcpu);
2566
2567 if (!(svm->vmcb->control.intercept_cr_write & INTERCEPT_CR8_MASK)) {
2568 int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
Gleb Natapov615d5192009-04-21 17:45:05 +03002569 kvm_set_cr8(vcpu, cr8);
Joerg Roedeld7bf8222008-04-16 16:51:17 +02002570 }
2571}
2572
Joerg Roedel649d6862008-04-16 16:51:15 +02002573static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
2574{
2575 struct vcpu_svm *svm = to_svm(vcpu);
2576 u64 cr8;
2577
Joerg Roedel649d6862008-04-16 16:51:15 +02002578 cr8 = kvm_get_cr8(vcpu);
2579 svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
2580 svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
2581}
2582
Gleb Natapov9222be12009-04-23 17:14:37 +03002583static void svm_complete_interrupts(struct vcpu_svm *svm)
2584{
2585 u8 vector;
2586 int type;
2587 u32 exitintinfo = svm->vmcb->control.exit_int_info;
2588
Gleb Natapov44c11432009-05-11 13:35:52 +03002589 if (svm->vcpu.arch.hflags & HF_IRET_MASK)
2590 svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
2591
Gleb Natapov9222be12009-04-23 17:14:37 +03002592 svm->vcpu.arch.nmi_injected = false;
2593 kvm_clear_exception_queue(&svm->vcpu);
2594 kvm_clear_interrupt_queue(&svm->vcpu);
2595
2596 if (!(exitintinfo & SVM_EXITINTINFO_VALID))
2597 return;
2598
2599 vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK;
2600 type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK;
2601
2602 switch (type) {
2603 case SVM_EXITINTINFO_TYPE_NMI:
2604 svm->vcpu.arch.nmi_injected = true;
2605 break;
2606 case SVM_EXITINTINFO_TYPE_EXEPT:
2607 /* In case of software exception do not reinject an exception
2608 vector, but re-execute and instruction instead */
Alexander Graf219b65d2009-06-15 15:21:25 +02002609 if (is_nested(svm))
2610 break;
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002611 if (kvm_exception_is_soft(vector))
Gleb Natapov9222be12009-04-23 17:14:37 +03002612 break;
2613 if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
2614 u32 err = svm->vmcb->control.exit_int_info_err;
2615 kvm_queue_exception_e(&svm->vcpu, vector, err);
2616
2617 } else
2618 kvm_queue_exception(&svm->vcpu, vector);
2619 break;
2620 case SVM_EXITINTINFO_TYPE_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002621 kvm_queue_interrupt(&svm->vcpu, vector, false);
Gleb Natapov9222be12009-04-23 17:14:37 +03002622 break;
2623 default:
2624 break;
2625 }
2626}
2627
Avi Kivity80e31d42008-07-14 14:44:59 +03002628#ifdef CONFIG_X86_64
2629#define R "r"
2630#else
2631#define R "e"
2632#endif
2633
Avi Kivity851ba692009-08-24 11:10:17 +03002634static void svm_vcpu_run(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002635{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002636 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002637 u16 fs_selector;
2638 u16 gs_selector;
2639 u16 ldt_selector;
Avi Kivityd9e368d2007-06-07 19:18:30 +03002640
Joerg Roedelcd3ff652009-10-09 16:08:26 +02002641 /*
2642 * A vmexit emulation is required before the vcpu can be executed
2643 * again.
2644 */
2645 if (unlikely(svm->nested.exit_required))
2646 return;
2647
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002648 svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
2649 svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
2650 svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];
2651
Rusty Russelle756fc62007-07-30 20:07:08 +10002652 pre_svm_run(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002653
Joerg Roedel649d6862008-04-16 16:51:15 +02002654 sync_lapic_to_cr8(vcpu);
2655
Avi Kivity6aa8b732006-12-10 02:21:36 -08002656 save_host_msrs(vcpu);
Avi Kivityd6e88ae2008-07-10 16:53:33 +03002657 fs_selector = kvm_read_fs();
2658 gs_selector = kvm_read_gs();
2659 ldt_selector = kvm_read_ldt();
Joerg Roedelcda0ffd2009-08-07 11:49:45 +02002660 svm->vmcb->save.cr2 = vcpu->arch.cr2;
Joerg Roedel709ddeb2008-02-07 13:47:45 +01002661 /* required for live migration with NPT */
2662 if (npt_enabled)
2663 svm->vmcb->save.cr3 = vcpu->arch.cr3;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002664
Avi Kivity04d2cc72007-09-10 18:10:54 +03002665 clgi();
2666
2667 local_irq_enable();
Avi Kivity36241b82006-12-22 01:05:20 -08002668
Avi Kivity6aa8b732006-12-10 02:21:36 -08002669 asm volatile (
Avi Kivity80e31d42008-07-14 14:44:59 +03002670 "push %%"R"bp; \n\t"
2671 "mov %c[rbx](%[svm]), %%"R"bx \n\t"
2672 "mov %c[rcx](%[svm]), %%"R"cx \n\t"
2673 "mov %c[rdx](%[svm]), %%"R"dx \n\t"
2674 "mov %c[rsi](%[svm]), %%"R"si \n\t"
2675 "mov %c[rdi](%[svm]), %%"R"di \n\t"
2676 "mov %c[rbp](%[svm]), %%"R"bp \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002677#ifdef CONFIG_X86_64
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002678 "mov %c[r8](%[svm]), %%r8 \n\t"
2679 "mov %c[r9](%[svm]), %%r9 \n\t"
2680 "mov %c[r10](%[svm]), %%r10 \n\t"
2681 "mov %c[r11](%[svm]), %%r11 \n\t"
2682 "mov %c[r12](%[svm]), %%r12 \n\t"
2683 "mov %c[r13](%[svm]), %%r13 \n\t"
2684 "mov %c[r14](%[svm]), %%r14 \n\t"
2685 "mov %c[r15](%[svm]), %%r15 \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002686#endif
2687
Avi Kivity6aa8b732006-12-10 02:21:36 -08002688 /* Enter guest mode */
Avi Kivity80e31d42008-07-14 14:44:59 +03002689 "push %%"R"ax \n\t"
2690 "mov %c[vmcb](%[svm]), %%"R"ax \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03002691 __ex(SVM_VMLOAD) "\n\t"
2692 __ex(SVM_VMRUN) "\n\t"
2693 __ex(SVM_VMSAVE) "\n\t"
Avi Kivity80e31d42008-07-14 14:44:59 +03002694 "pop %%"R"ax \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002695
2696 /* Save guest registers, load host registers */
Avi Kivity80e31d42008-07-14 14:44:59 +03002697 "mov %%"R"bx, %c[rbx](%[svm]) \n\t"
2698 "mov %%"R"cx, %c[rcx](%[svm]) \n\t"
2699 "mov %%"R"dx, %c[rdx](%[svm]) \n\t"
2700 "mov %%"R"si, %c[rsi](%[svm]) \n\t"
2701 "mov %%"R"di, %c[rdi](%[svm]) \n\t"
2702 "mov %%"R"bp, %c[rbp](%[svm]) \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002703#ifdef CONFIG_X86_64
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002704 "mov %%r8, %c[r8](%[svm]) \n\t"
2705 "mov %%r9, %c[r9](%[svm]) \n\t"
2706 "mov %%r10, %c[r10](%[svm]) \n\t"
2707 "mov %%r11, %c[r11](%[svm]) \n\t"
2708 "mov %%r12, %c[r12](%[svm]) \n\t"
2709 "mov %%r13, %c[r13](%[svm]) \n\t"
2710 "mov %%r14, %c[r14](%[svm]) \n\t"
2711 "mov %%r15, %c[r15](%[svm]) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002712#endif
Avi Kivity80e31d42008-07-14 14:44:59 +03002713 "pop %%"R"bp"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002714 :
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002715 : [svm]"a"(svm),
Avi Kivity6aa8b732006-12-10 02:21:36 -08002716 [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002717 [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])),
2718 [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])),
2719 [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])),
2720 [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])),
2721 [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])),
2722 [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP]))
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002723#ifdef CONFIG_X86_64
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002724 , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])),
2725 [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])),
2726 [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])),
2727 [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])),
2728 [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])),
2729 [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])),
2730 [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])),
2731 [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15]))
Avi Kivity6aa8b732006-12-10 02:21:36 -08002732#endif
Laurent Vivier54a08c02007-10-25 14:18:53 +02002733 : "cc", "memory"
Avi Kivity80e31d42008-07-14 14:44:59 +03002734 , R"bx", R"cx", R"dx", R"si", R"di"
Laurent Vivier54a08c02007-10-25 14:18:53 +02002735#ifdef CONFIG_X86_64
Laurent Vivier54a08c02007-10-25 14:18:53 +02002736 , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
2737#endif
2738 );
Avi Kivity6aa8b732006-12-10 02:21:36 -08002739
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002740 vcpu->arch.cr2 = svm->vmcb->save.cr2;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002741 vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
2742 vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
2743 vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002744
Avi Kivityd6e88ae2008-07-10 16:53:33 +03002745 kvm_load_fs(fs_selector);
2746 kvm_load_gs(gs_selector);
2747 kvm_load_ldt(ldt_selector);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002748 load_host_msrs(vcpu);
2749
2750 reload_tss(vcpu);
2751
Avi Kivity56ba47d2007-11-07 17:14:18 +02002752 local_irq_disable();
2753
2754 stgi();
2755
Joerg Roedeld7bf8222008-04-16 16:51:17 +02002756 sync_cr8_to_lapic(vcpu);
2757
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002758 svm->next_rip = 0;
Gleb Natapov9222be12009-04-23 17:14:37 +03002759
Avi Kivity6de4f3a2009-05-31 22:58:47 +03002760 if (npt_enabled) {
2761 vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
2762 vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
2763 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002764}
2765
Avi Kivity80e31d42008-07-14 14:44:59 +03002766#undef R
2767
Avi Kivity6aa8b732006-12-10 02:21:36 -08002768static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
2769{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002770 struct vcpu_svm *svm = to_svm(vcpu);
2771
Joerg Roedel709ddeb2008-02-07 13:47:45 +01002772 if (npt_enabled) {
2773 svm->vmcb->control.nested_cr3 = root;
2774 force_new_asid(vcpu);
2775 return;
2776 }
2777
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002778 svm->vmcb->save.cr3 = root;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002779 force_new_asid(vcpu);
Anthony Liguori7807fa62007-04-23 09:17:21 -05002780
2781 if (vcpu->fpu_active) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002782 svm->vmcb->control.intercept_exceptions |= (1 << NM_VECTOR);
2783 svm->vmcb->save.cr0 |= X86_CR0_TS;
Anthony Liguori7807fa62007-04-23 09:17:21 -05002784 vcpu->fpu_active = 0;
2785 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002786}
2787
Avi Kivity6aa8b732006-12-10 02:21:36 -08002788static int is_disabled(void)
2789{
Joerg Roedel6031a612007-06-22 12:29:50 +03002790 u64 vm_cr;
2791
2792 rdmsrl(MSR_VM_CR, vm_cr);
2793 if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
2794 return 1;
2795
Avi Kivity6aa8b732006-12-10 02:21:36 -08002796 return 0;
2797}
2798
Ingo Molnar102d8322007-02-19 14:37:47 +02002799static void
2800svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
2801{
2802 /*
2803 * Patch in the VMMCALL instruction:
2804 */
2805 hypercall[0] = 0x0f;
2806 hypercall[1] = 0x01;
2807 hypercall[2] = 0xd9;
Ingo Molnar102d8322007-02-19 14:37:47 +02002808}
2809
Yang, Sheng002c7f72007-07-31 14:23:01 +03002810static void svm_check_processor_compat(void *rtn)
2811{
2812 *(int *)rtn = 0;
2813}
2814
Avi Kivity774ead32007-12-26 13:57:04 +02002815static bool svm_cpu_has_accelerated_tpr(void)
2816{
2817 return false;
2818}
2819
Sheng Yang67253af2008-04-25 10:20:22 +08002820static int get_npt_level(void)
2821{
2822#ifdef CONFIG_X86_64
2823 return PT64_ROOT_LEVEL;
2824#else
2825 return PT32E_ROOT_LEVEL;
2826#endif
2827}
2828
Sheng Yang4b12f0d2009-04-27 20:35:42 +08002829static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
Sheng Yang64d4d522008-10-09 16:01:57 +08002830{
2831 return 0;
2832}
2833
Marcelo Tosatti229456f2009-06-17 09:22:14 -03002834static const struct trace_print_flags svm_exit_reasons_str[] = {
2835 { SVM_EXIT_READ_CR0, "read_cr0" },
2836 { SVM_EXIT_READ_CR3, "read_cr3" },
2837 { SVM_EXIT_READ_CR4, "read_cr4" },
2838 { SVM_EXIT_READ_CR8, "read_cr8" },
2839 { SVM_EXIT_WRITE_CR0, "write_cr0" },
2840 { SVM_EXIT_WRITE_CR3, "write_cr3" },
2841 { SVM_EXIT_WRITE_CR4, "write_cr4" },
2842 { SVM_EXIT_WRITE_CR8, "write_cr8" },
2843 { SVM_EXIT_READ_DR0, "read_dr0" },
2844 { SVM_EXIT_READ_DR1, "read_dr1" },
2845 { SVM_EXIT_READ_DR2, "read_dr2" },
2846 { SVM_EXIT_READ_DR3, "read_dr3" },
2847 { SVM_EXIT_WRITE_DR0, "write_dr0" },
2848 { SVM_EXIT_WRITE_DR1, "write_dr1" },
2849 { SVM_EXIT_WRITE_DR2, "write_dr2" },
2850 { SVM_EXIT_WRITE_DR3, "write_dr3" },
2851 { SVM_EXIT_WRITE_DR5, "write_dr5" },
2852 { SVM_EXIT_WRITE_DR7, "write_dr7" },
2853 { SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" },
2854 { SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" },
2855 { SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" },
2856 { SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" },
2857 { SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" },
2858 { SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" },
2859 { SVM_EXIT_INTR, "interrupt" },
2860 { SVM_EXIT_NMI, "nmi" },
2861 { SVM_EXIT_SMI, "smi" },
2862 { SVM_EXIT_INIT, "init" },
2863 { SVM_EXIT_VINTR, "vintr" },
2864 { SVM_EXIT_CPUID, "cpuid" },
2865 { SVM_EXIT_INVD, "invd" },
2866 { SVM_EXIT_HLT, "hlt" },
2867 { SVM_EXIT_INVLPG, "invlpg" },
2868 { SVM_EXIT_INVLPGA, "invlpga" },
2869 { SVM_EXIT_IOIO, "io" },
2870 { SVM_EXIT_MSR, "msr" },
2871 { SVM_EXIT_TASK_SWITCH, "task_switch" },
2872 { SVM_EXIT_SHUTDOWN, "shutdown" },
2873 { SVM_EXIT_VMRUN, "vmrun" },
2874 { SVM_EXIT_VMMCALL, "hypercall" },
2875 { SVM_EXIT_VMLOAD, "vmload" },
2876 { SVM_EXIT_VMSAVE, "vmsave" },
2877 { SVM_EXIT_STGI, "stgi" },
2878 { SVM_EXIT_CLGI, "clgi" },
2879 { SVM_EXIT_SKINIT, "skinit" },
2880 { SVM_EXIT_WBINVD, "wbinvd" },
2881 { SVM_EXIT_MONITOR, "monitor" },
2882 { SVM_EXIT_MWAIT, "mwait" },
2883 { SVM_EXIT_NPF, "npf" },
2884 { -1, NULL }
2885};
2886
Joerg Roedel344f4142009-07-27 16:30:48 +02002887static bool svm_gb_page_enable(void)
2888{
2889 return true;
2890}
2891
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +03002892static struct kvm_x86_ops svm_x86_ops = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08002893 .cpu_has_kvm_support = has_svm,
2894 .disabled_by_bios = is_disabled,
2895 .hardware_setup = svm_hardware_setup,
2896 .hardware_unsetup = svm_hardware_unsetup,
Yang, Sheng002c7f72007-07-31 14:23:01 +03002897 .check_processor_compatibility = svm_check_processor_compat,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002898 .hardware_enable = svm_hardware_enable,
2899 .hardware_disable = svm_hardware_disable,
Avi Kivity774ead32007-12-26 13:57:04 +02002900 .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002901
2902 .vcpu_create = svm_create_vcpu,
2903 .vcpu_free = svm_free_vcpu,
Avi Kivity04d2cc72007-09-10 18:10:54 +03002904 .vcpu_reset = svm_vcpu_reset,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002905
Avi Kivity04d2cc72007-09-10 18:10:54 +03002906 .prepare_guest_switch = svm_prepare_guest_switch,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002907 .vcpu_load = svm_vcpu_load,
2908 .vcpu_put = svm_vcpu_put,
2909
2910 .set_guest_debug = svm_guest_debug,
2911 .get_msr = svm_get_msr,
2912 .set_msr = svm_set_msr,
2913 .get_segment_base = svm_get_segment_base,
2914 .get_segment = svm_get_segment,
2915 .set_segment = svm_set_segment,
Izik Eidus2e4d2652008-03-24 19:38:34 +02002916 .get_cpl = svm_get_cpl,
Rusty Russell1747fb72007-09-06 01:21:32 +10002917 .get_cs_db_l_bits = kvm_get_cs_db_l_bits,
Anthony Liguori25c4c272007-04-27 09:29:21 +03002918 .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002919 .set_cr0 = svm_set_cr0,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002920 .set_cr3 = svm_set_cr3,
2921 .set_cr4 = svm_set_cr4,
2922 .set_efer = svm_set_efer,
2923 .get_idt = svm_get_idt,
2924 .set_idt = svm_set_idt,
2925 .get_gdt = svm_get_gdt,
2926 .set_gdt = svm_set_gdt,
2927 .get_dr = svm_get_dr,
2928 .set_dr = svm_set_dr,
Avi Kivity6de4f3a2009-05-31 22:58:47 +03002929 .cache_reg = svm_cache_reg,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002930 .get_rflags = svm_get_rflags,
2931 .set_rflags = svm_set_rflags,
2932
Avi Kivity6aa8b732006-12-10 02:21:36 -08002933 .tlb_flush = svm_flush_tlb,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002934
Avi Kivity6aa8b732006-12-10 02:21:36 -08002935 .run = svm_vcpu_run,
Avi Kivity04d2cc72007-09-10 18:10:54 +03002936 .handle_exit = handle_exit,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002937 .skip_emulated_instruction = skip_emulated_instruction,
Glauber Costa2809f5d2009-05-12 16:21:05 -04002938 .set_interrupt_shadow = svm_set_interrupt_shadow,
2939 .get_interrupt_shadow = svm_get_interrupt_shadow,
Ingo Molnar102d8322007-02-19 14:37:47 +02002940 .patch_hypercall = svm_patch_hypercall,
Eddie Dong2a8067f2007-08-06 16:29:07 +03002941 .set_irq = svm_set_irq,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002942 .set_nmi = svm_inject_nmi,
Avi Kivity298101d2007-11-25 13:41:11 +02002943 .queue_exception = svm_queue_exception,
Gleb Natapov78646122009-03-23 12:12:11 +02002944 .interrupt_allowed = svm_interrupt_allowed,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002945 .nmi_allowed = svm_nmi_allowed,
2946 .enable_nmi_window = enable_nmi_window,
2947 .enable_irq_window = enable_irq_window,
2948 .update_cr8_intercept = update_cr8_intercept,
Izik Eiduscbc94022007-10-25 00:29:55 +02002949
2950 .set_tss_addr = svm_set_tss_addr,
Sheng Yang67253af2008-04-25 10:20:22 +08002951 .get_tdp_level = get_npt_level,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08002952 .get_mt_mask = svm_get_mt_mask,
Marcelo Tosatti229456f2009-06-17 09:22:14 -03002953
2954 .exit_reasons_str = svm_exit_reasons_str,
Joerg Roedel344f4142009-07-27 16:30:48 +02002955 .gb_page_enable = svm_gb_page_enable,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002956};
2957
2958static int __init svm_init(void)
2959{
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08002960 return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
Rusty Russellc16f8622007-07-30 21:12:19 +10002961 THIS_MODULE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002962}
2963
2964static void __exit svm_exit(void)
2965{
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08002966 kvm_exit();
Avi Kivity6aa8b732006-12-10 02:21:36 -08002967}
2968
2969module_init(svm_init)
2970module_exit(svm_exit)