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KVM: Clear exception queue before emulating an instruction
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / x86 / kvm / vmx.c
CommitLineData
6aa8b732
AK		 1/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
8 *
9 * Authors:
10 * Avi Kivity <avi@qumranet.com>
11 * Yaniv Kamay <yaniv@qumranet.com>
12 *
13 * This work is licensed under the terms of the GNU GPL, version 2. See
14 * the COPYING file in the top-level directory.
15 *
16 */
17
85f455f7 18#include "irq.h"
6aa8b732 19#include "vmx.h"
1d737c8a 20#include "mmu.h"
e495606d 21
edf88417 22#include <linux/kvm_host.h>
6aa8b732 23#include <linux/module.h>
9d8f549d 24#include <linux/kernel.h>
6aa8b732
AK		 25#include <linux/mm.h>
26#include <linux/highmem.h>
e8edc6e0 27#include <linux/sched.h>
c7addb90 28#include <linux/moduleparam.h>
5fdbf976 29#include "kvm_cache_regs.h"
e495606d 30
6aa8b732 31#include <asm/io.h>
3b3be0d1 32#include <asm/desc.h>
6aa8b732 33
4ecac3fd
AK		 34#define __ex(x) __kvm_handle_fault_on_reboot(x)
35
6aa8b732
AK		 36MODULE_AUTHOR("Qumranet");
37MODULE_LICENSE("GPL");
38
c7addb90
AK		 39static int bypass_guest_pf = 1;
40module_param(bypass_guest_pf, bool, 0);
41
2384d2b3
SY		 42static int enable_vpid = 1;
43module_param(enable_vpid, bool, 0);
44
4c9fc8ef
AK		 45static int flexpriority_enabled = 1;
46module_param(flexpriority_enabled, bool, 0);
47
1439442c 48static int enable_ept = 1;
d56f546d
SY		 49module_param(enable_ept, bool, 0);
50
a2fa3e9f
GH		 51struct vmcs {
52 u32 revision_id;
53 u32 abort;
54 char data[0];
55};
56
57struct vcpu_vmx {
fb3f0f51 58 struct kvm_vcpu vcpu;
543e4243 59 struct list_head local_vcpus_link;
a2fa3e9f 60 int launched;
29bd8a78 61 u8 fail;
1155f76a 62 u32 idt_vectoring_info;
a2fa3e9f
GH		 63 struct kvm_msr_entry *guest_msrs;
64 struct kvm_msr_entry *host_msrs;
65 int nmsrs;
66 int save_nmsrs;
67 int msr_offset_efer;
68#ifdef CONFIG_X86_64
69 int msr_offset_kernel_gs_base;
70#endif
71 struct vmcs *vmcs;
72 struct {
73 int loaded;
74 u16 fs_sel, gs_sel, ldt_sel;
152d3f2f
LV		 75 int gs_ldt_reload_needed;
76 int fs_reload_needed;
51c6cf66 77 int guest_efer_loaded;
d77c26fc 78 } host_state;
9c8cba37
AK		 79 struct {
80 struct {
81 bool pending;
82 u8 vector;
83 unsigned rip;
84 } irq;
85 } rmode;
2384d2b3 86 int vpid;
a2fa3e9f
GH		 87};
88
89static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
90{
fb3f0f51 91 return container_of(vcpu, struct vcpu_vmx, vcpu);
a2fa3e9f
GH		 92}
93
b7ebfb05 94static int init_rmode(struct kvm *kvm);
4e1096d2 95static u64 construct_eptp(unsigned long root_hpa);
75880a01 96
6aa8b732
AK		 97static DEFINE_PER_CPU(struct vmcs *, vmxarea);
98static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
543e4243 99static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu);
6aa8b732 100
fdef3ad1
HQ		 101static struct page *vmx_io_bitmap_a;
102static struct page *vmx_io_bitmap_b;
25c5f225 103static struct page *vmx_msr_bitmap;
fdef3ad1 104
2384d2b3
SY		 105static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
106static DEFINE_SPINLOCK(vmx_vpid_lock);
107
1c3d14fe 108static struct vmcs_config {
6aa8b732
AK		 109 int size;
110 int order;
111 u32 revision_id;
1c3d14fe
YS		 112 u32 pin_based_exec_ctrl;
113 u32 cpu_based_exec_ctrl;
f78e0e2e 114 u32 cpu_based_2nd_exec_ctrl;
1c3d14fe
YS		 115 u32 vmexit_ctrl;
116 u32 vmentry_ctrl;
117} vmcs_config;
6aa8b732 118
d56f546d
SY		 119struct vmx_capability {
120 u32 ept;
121 u32 vpid;
122} vmx_capability;
123
6aa8b732
AK		 124#define VMX_SEGMENT_FIELD(seg) \
125 [VCPU_SREG_##seg] = { \
126 .selector = GUEST_##seg##_SELECTOR, \
127 .base = GUEST_##seg##_BASE, \
128 .limit = GUEST_##seg##_LIMIT, \
129 .ar_bytes = GUEST_##seg##_AR_BYTES, \
130 }
131
132static struct kvm_vmx_segment_field {
133 unsigned selector;
134 unsigned base;
135 unsigned limit;
136 unsigned ar_bytes;
137} kvm_vmx_segment_fields[] = {
138 VMX_SEGMENT_FIELD(CS),
139 VMX_SEGMENT_FIELD(DS),
140 VMX_SEGMENT_FIELD(ES),
141 VMX_SEGMENT_FIELD(FS),
142 VMX_SEGMENT_FIELD(GS),
143 VMX_SEGMENT_FIELD(SS),
144 VMX_SEGMENT_FIELD(TR),
145 VMX_SEGMENT_FIELD(LDTR),
146};
147
4d56c8a7
AK		 148/*
149 * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it
150 * away by decrementing the array size.
151 */
6aa8b732 152static const u32 vmx_msr_index[] = {
05b3e0c2 153#ifdef CONFIG_X86_64
6aa8b732
AK		 154 MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE,
155#endif
156 MSR_EFER, MSR_K6_STAR,
157};
9d8f549d 158#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
6aa8b732 159
a2fa3e9f
GH		 160static void load_msrs(struct kvm_msr_entry *e, int n)
161{
162 int i;
163
164 for (i = 0; i < n; ++i)
165 wrmsrl(e[i].index, e[i].data);
166}
167
168static void save_msrs(struct kvm_msr_entry *e, int n)
169{
170 int i;
171
172 for (i = 0; i < n; ++i)
173 rdmsrl(e[i].index, e[i].data);
174}
175
6aa8b732
AK		 176static inline int is_page_fault(u32 intr_info)
177{
178 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
179 INTR_INFO_VALID_MASK)) ==
180 (INTR_TYPE_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
181}
182
2ab455cc
AL		 183static inline int is_no_device(u32 intr_info)
184{
185 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
186 INTR_INFO_VALID_MASK)) ==
187 (INTR_TYPE_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
188}
189
7aa81cc0
AL		 190static inline int is_invalid_opcode(u32 intr_info)
191{
192 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
193 INTR_INFO_VALID_MASK)) ==
194 (INTR_TYPE_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK);
195}
196
6aa8b732
AK		 197static inline int is_external_interrupt(u32 intr_info)
198{
199 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
200 == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
201}
202
25c5f225
SY		 203static inline int cpu_has_vmx_msr_bitmap(void)
204{
205 return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS);
206}
207
6e5d865c
YS		 208static inline int cpu_has_vmx_tpr_shadow(void)
209{
210 return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW);
211}
212
213static inline int vm_need_tpr_shadow(struct kvm *kvm)
214{
215 return ((cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm)));
216}
217
f78e0e2e
SY		 218static inline int cpu_has_secondary_exec_ctrls(void)
219{
220 return (vmcs_config.cpu_based_exec_ctrl &
221 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS);
222}
223
774ead3a 224static inline bool cpu_has_vmx_virtualize_apic_accesses(void)
f78e0e2e 225{
4c9fc8ef
AK		 226 return flexpriority_enabled
227 && (vmcs_config.cpu_based_2nd_exec_ctrl &
228 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES);
f78e0e2e
SY		 229}
230
d56f546d
SY		 231static inline int cpu_has_vmx_invept_individual_addr(void)
232{
233 return (!!(vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT));
234}
235
236static inline int cpu_has_vmx_invept_context(void)
237{
238 return (!!(vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT));
239}
240
241static inline int cpu_has_vmx_invept_global(void)
242{
243 return (!!(vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT));
244}
245
246static inline int cpu_has_vmx_ept(void)
247{
248 return (vmcs_config.cpu_based_2nd_exec_ctrl &
249 SECONDARY_EXEC_ENABLE_EPT);
250}
251
252static inline int vm_need_ept(void)
253{
254 return (cpu_has_vmx_ept() && enable_ept);
255}
256
f78e0e2e
SY		 257static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm)
258{
259 return ((cpu_has_vmx_virtualize_apic_accesses()) &&
260 (irqchip_in_kernel(kvm)));
261}
262
2384d2b3
SY		 263static inline int cpu_has_vmx_vpid(void)
264{
265 return (vmcs_config.cpu_based_2nd_exec_ctrl &
266 SECONDARY_EXEC_ENABLE_VPID);
267}
268
f08864b4
SY		 269static inline int cpu_has_virtual_nmis(void)
270{
271 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS;
272}
273
8b9cf98c 274static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
7725f0ba
AK		 275{
276 int i;
277
a2fa3e9f
GH		 278 for (i = 0; i < vmx->nmsrs; ++i)
279 if (vmx->guest_msrs[i].index == msr)
a75beee6
ED		 280 return i;
281 return -1;
282}
283
2384d2b3
SY		 284static inline void __invvpid(int ext, u16 vpid, gva_t gva)
285{
286 struct {
287 u64 vpid : 16;
288 u64 rsvd : 48;
289 u64 gva;
290 } operand = { vpid, 0, gva };
291
4ecac3fd 292 asm volatile (__ex(ASM_VMX_INVVPID)
2384d2b3
SY		 293 /* CF==1 or ZF==1 --> rc = -1 */
294 "; ja 1f ; ud2 ; 1:"
295 : : "a"(&operand), "c"(ext) : "cc", "memory");
296}
297
1439442c
SY		 298static inline void __invept(int ext, u64 eptp, gpa_t gpa)
299{
300 struct {
301 u64 eptp, gpa;
302 } operand = {eptp, gpa};
303
4ecac3fd 304 asm volatile (__ex(ASM_VMX_INVEPT)
1439442c
SY		 305 /* CF==1 or ZF==1 --> rc = -1 */
306 "; ja 1f ; ud2 ; 1:\n"
307 : : "a" (&operand), "c" (ext) : "cc", "memory");
308}
309
8b9cf98c 310static struct kvm_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
a75beee6
ED		 311{
312 int i;
313
8b9cf98c 314 i = __find_msr_index(vmx, msr);
a75beee6 315 if (i >= 0)
a2fa3e9f 316 return &vmx->guest_msrs[i];
8b6d44c7 317 return NULL;
7725f0ba
AK		 318}
319
6aa8b732
AK		 320static void vmcs_clear(struct vmcs *vmcs)
321{
322 u64 phys_addr = __pa(vmcs);
323 u8 error;
324
4ecac3fd 325 asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0"
6aa8b732
AK		 326 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
327 : "cc", "memory");
328 if (error)
329 printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
330 vmcs, phys_addr);
331}
332
333static void __vcpu_clear(void *arg)
334{
8b9cf98c 335 struct vcpu_vmx *vmx = arg;
d3b2c338 336 int cpu = raw_smp_processor_id();
6aa8b732 337
8b9cf98c 338 if (vmx->vcpu.cpu == cpu)
a2fa3e9f
GH		 339 vmcs_clear(vmx->vmcs);
340 if (per_cpu(current_vmcs, cpu) == vmx->vmcs)
6aa8b732 341 per_cpu(current_vmcs, cpu) = NULL;
ad312c7c 342 rdtscll(vmx->vcpu.arch.host_tsc);
543e4243
AK		 343 list_del(&vmx->local_vcpus_link);
344 vmx->vcpu.cpu = -1;
345 vmx->launched = 0;
6aa8b732
AK		 346}
347
8b9cf98c 348static void vcpu_clear(struct vcpu_vmx *vmx)
8d0be2b3 349{
eae5ecb5
AK		 350 if (vmx->vcpu.cpu == -1)
351 return;
8691e5a8 352 smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1);
8d0be2b3
AK		 353}
354
2384d2b3
SY		 355static inline void vpid_sync_vcpu_all(struct vcpu_vmx *vmx)
356{
357 if (vmx->vpid == 0)
358 return;
359
360 __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
361}
362
1439442c
SY		 363static inline void ept_sync_global(void)
364{
365 if (cpu_has_vmx_invept_global())
366 __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
367}
368
369static inline void ept_sync_context(u64 eptp)
370{
371 if (vm_need_ept()) {
372 if (cpu_has_vmx_invept_context())
373 __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
374 else
375 ept_sync_global();
376 }
377}
378
379static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
380{
381 if (vm_need_ept()) {
382 if (cpu_has_vmx_invept_individual_addr())
383 __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR,
384 eptp, gpa);
385 else
386 ept_sync_context(eptp);
387 }
388}
389
6aa8b732
AK		 390static unsigned long vmcs_readl(unsigned long field)
391{
392 unsigned long value;
393
4ecac3fd 394 asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX)
6aa8b732
AK		 395 : "=a"(value) : "d"(field) : "cc");
396 return value;
397}
398
399static u16 vmcs_read16(unsigned long field)
400{
401 return vmcs_readl(field);
402}
403
404static u32 vmcs_read32(unsigned long field)
405{
406 return vmcs_readl(field);
407}
408
409static u64 vmcs_read64(unsigned long field)
410{
05b3e0c2 411#ifdef CONFIG_X86_64
6aa8b732
AK		 412 return vmcs_readl(field);
413#else
414 return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
415#endif
416}
417
e52de1b8
AK		 418static noinline void vmwrite_error(unsigned long field, unsigned long value)
419{
420 printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
421 field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
422 dump_stack();
423}
424
6aa8b732
AK		 425static void vmcs_writel(unsigned long field, unsigned long value)
426{
427 u8 error;
428
4ecac3fd 429 asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0"
d77c26fc 430 : "=q"(error) : "a"(value), "d"(field) : "cc");
e52de1b8
AK		 431 if (unlikely(error))
432 vmwrite_error(field, value);
6aa8b732
AK		 433}
434
435static void vmcs_write16(unsigned long field, u16 value)
436{
437 vmcs_writel(field, value);
438}
439
440static void vmcs_write32(unsigned long field, u32 value)
441{
442 vmcs_writel(field, value);
443}
444
445static void vmcs_write64(unsigned long field, u64 value)
446{
6aa8b732 447 vmcs_writel(field, value);
7682f2d0 448#ifndef CONFIG_X86_64
6aa8b732
AK		 449 asm volatile ("");
450 vmcs_writel(field+1, value >> 32);
451#endif
452}
453
2ab455cc
AL		 454static void vmcs_clear_bits(unsigned long field, u32 mask)
455{
456 vmcs_writel(field, vmcs_readl(field) & ~mask);
457}
458
459static void vmcs_set_bits(unsigned long field, u32 mask)
460{
461 vmcs_writel(field, vmcs_readl(field) | mask);
462}
463
abd3f2d6
AK		 464static void update_exception_bitmap(struct kvm_vcpu *vcpu)
465{
466 u32 eb;
467
7aa81cc0 468 eb = (1u << PF_VECTOR) | (1u << UD_VECTOR);
abd3f2d6
AK		 469 if (!vcpu->fpu_active)
470 eb |= 1u << NM_VECTOR;
471 if (vcpu->guest_debug.enabled)
472 eb |= 1u << 1;
ad312c7c 473 if (vcpu->arch.rmode.active)
abd3f2d6 474 eb = ~0;
1439442c
SY		 475 if (vm_need_ept())
476 eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */
abd3f2d6
AK		 477 vmcs_write32(EXCEPTION_BITMAP, eb);
478}
479
33ed6329
AK		 480static void reload_tss(void)
481{
33ed6329
AK		 482 /*
483 * VT restores TR but not its size. Useless.
484 */
485 struct descriptor_table gdt;
a5f61300 486 struct desc_struct *descs;
33ed6329 487
d6e88aec 488 kvm_get_gdt(&gdt);
33ed6329
AK		 489 descs = (void *)gdt.base;
490 descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
491 load_TR_desc();
33ed6329
AK		 492}
493
8b9cf98c 494static void load_transition_efer(struct vcpu_vmx *vmx)
2cc51560 495{
a2fa3e9f 496 int efer_offset = vmx->msr_offset_efer;
51c6cf66
AK		 497 u64 host_efer = vmx->host_msrs[efer_offset].data;
498 u64 guest_efer = vmx->guest_msrs[efer_offset].data;
499 u64 ignore_bits;
500
501 if (efer_offset < 0)
502 return;
503 /*
504 * NX is emulated; LMA and LME handled by hardware; SCE meaninless
505 * outside long mode
506 */
507 ignore_bits = EFER_NX | EFER_SCE;
508#ifdef CONFIG_X86_64
509 ignore_bits |= EFER_LMA | EFER_LME;
510 /* SCE is meaningful only in long mode on Intel */
511 if (guest_efer & EFER_LMA)
512 ignore_bits &= ~(u64)EFER_SCE;
513#endif
514 if ((guest_efer & ~ignore_bits) == (host_efer & ~ignore_bits))
515 return;
2cc51560 516
51c6cf66
AK		 517 vmx->host_state.guest_efer_loaded = 1;
518 guest_efer &= ~ignore_bits;
519 guest_efer |= host_efer & ignore_bits;
520 wrmsrl(MSR_EFER, guest_efer);
8b9cf98c 521 vmx->vcpu.stat.efer_reload++;
2cc51560
ED		 522}
523
51c6cf66
AK		 524static void reload_host_efer(struct vcpu_vmx *vmx)
525{
526 if (vmx->host_state.guest_efer_loaded) {
527 vmx->host_state.guest_efer_loaded = 0;
528 load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1);
529 }
530}
531
04d2cc77 532static void vmx_save_host_state(struct kvm_vcpu *vcpu)
33ed6329 533{
04d2cc77
AK		 534 struct vcpu_vmx *vmx = to_vmx(vcpu);
535
a2fa3e9f 536 if (vmx->host_state.loaded)
33ed6329
AK		 537 return;
538
a2fa3e9f 539 vmx->host_state.loaded = 1;
33ed6329
AK		 540 /*
541 * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
542 * allow segment selectors with cpl > 0 or ti == 1.
543 */
d6e88aec 544 vmx->host_state.ldt_sel = kvm_read_ldt();
152d3f2f 545 vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
d6e88aec 546 vmx->host_state.fs_sel = kvm_read_fs();
152d3f2f 547 if (!(vmx->host_state.fs_sel & 7)) {
a2fa3e9f 548 vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
152d3f2f
LV		 549 vmx->host_state.fs_reload_needed = 0;
550 } else {
33ed6329 551 vmcs_write16(HOST_FS_SELECTOR, 0);
152d3f2f 552 vmx->host_state.fs_reload_needed = 1;
33ed6329 553 }
d6e88aec 554 vmx->host_state.gs_sel = kvm_read_gs();
a2fa3e9f
GH		 555 if (!(vmx->host_state.gs_sel & 7))
556 vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
33ed6329
AK		 557 else {
558 vmcs_write16(HOST_GS_SELECTOR, 0);
152d3f2f 559 vmx->host_state.gs_ldt_reload_needed = 1;
33ed6329
AK		 560 }
561
562#ifdef CONFIG_X86_64
563 vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
564 vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
565#else
a2fa3e9f
GH		 566 vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
567 vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
33ed6329 568#endif
707c0874
AK		 569
570#ifdef CONFIG_X86_64
d77c26fc 571 if (is_long_mode(&vmx->vcpu))
a2fa3e9f
GH		 572 save_msrs(vmx->host_msrs +
573 vmx->msr_offset_kernel_gs_base, 1);
d77c26fc 574
707c0874 575#endif
a2fa3e9f 576 load_msrs(vmx->guest_msrs, vmx->save_nmsrs);
51c6cf66 577 load_transition_efer(vmx);
33ed6329
AK		 578}
579
a9b21b62 580static void __vmx_load_host_state(struct vcpu_vmx *vmx)
33ed6329 581{
15ad7146 582 unsigned long flags;
33ed6329 583
a2fa3e9f 584 if (!vmx->host_state.loaded)
33ed6329
AK		 585 return;
586
e1beb1d3 587 ++vmx->vcpu.stat.host_state_reload;
a2fa3e9f 588 vmx->host_state.loaded = 0;
152d3f2f 589 if (vmx->host_state.fs_reload_needed)
d6e88aec 590 kvm_load_fs(vmx->host_state.fs_sel);
152d3f2f 591 if (vmx->host_state.gs_ldt_reload_needed) {
d6e88aec 592 kvm_load_ldt(vmx->host_state.ldt_sel);
33ed6329
AK		 593 /*
594 * If we have to reload gs, we must take care to
595 * preserve our gs base.
596 */
15ad7146 597 local_irq_save(flags);
d6e88aec 598 kvm_load_gs(vmx->host_state.gs_sel);
33ed6329
AK		 599#ifdef CONFIG_X86_64
600 wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE));
601#endif
15ad7146 602 local_irq_restore(flags);
33ed6329 603 }
152d3f2f 604 reload_tss();
a2fa3e9f
GH		 605 save_msrs(vmx->guest_msrs, vmx->save_nmsrs);
606 load_msrs(vmx->host_msrs, vmx->save_nmsrs);
51c6cf66 607 reload_host_efer(vmx);
33ed6329
AK		 608}
609
a9b21b62
AK		 610static void vmx_load_host_state(struct vcpu_vmx *vmx)
611{
612 preempt_disable();
613 __vmx_load_host_state(vmx);
614 preempt_enable();
615}
616
6aa8b732
AK		 617/*
618 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
619 * vcpu mutex is already taken.
620 */
15ad7146 621static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
6aa8b732 622{
a2fa3e9f
GH		 623 struct vcpu_vmx *vmx = to_vmx(vcpu);
624 u64 phys_addr = __pa(vmx->vmcs);
019960ae 625 u64 tsc_this, delta, new_offset;
6aa8b732 626
a3d7f85f 627 if (vcpu->cpu != cpu) {
8b9cf98c 628 vcpu_clear(vmx);
2f599714 629 kvm_migrate_timers(vcpu);
2384d2b3 630 vpid_sync_vcpu_all(vmx);
543e4243
AK		 631 local_irq_disable();
632 list_add(&vmx->local_vcpus_link,
633 &per_cpu(vcpus_on_cpu, cpu));
634 local_irq_enable();
a3d7f85f 635 }
6aa8b732 636
a2fa3e9f 637 if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
6aa8b732
AK		 638 u8 error;
639
a2fa3e9f 640 per_cpu(current_vmcs, cpu) = vmx->vmcs;
4ecac3fd 641 asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
6aa8b732
AK		 642 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
643 : "cc");
644 if (error)
645 printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
a2fa3e9f 646 vmx->vmcs, phys_addr);
6aa8b732
AK		 647 }
648
649 if (vcpu->cpu != cpu) {
650 struct descriptor_table dt;
651 unsigned long sysenter_esp;
652
653 vcpu->cpu = cpu;
654 /*
655 * Linux uses per-cpu TSS and GDT, so set these when switching
656 * processors.
657 */
d6e88aec
AK		 658 vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */
659 kvm_get_gdt(&dt);
6aa8b732
AK		 660 vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */
661
662 rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
663 vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
7700270e
AK		 664
665 /*
666 * Make sure the time stamp counter is monotonous.
667 */
668 rdtscll(tsc_this);
019960ae
AK		 669 if (tsc_this < vcpu->arch.host_tsc) {
670 delta = vcpu->arch.host_tsc - tsc_this;
671 new_offset = vmcs_read64(TSC_OFFSET) + delta;
672 vmcs_write64(TSC_OFFSET, new_offset);
673 }
6aa8b732 674 }
6aa8b732
AK		 675}
676
677static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
678{
a9b21b62 679 __vmx_load_host_state(to_vmx(vcpu));
6aa8b732
AK		 680}
681
5fd86fcf
AK		 682static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
683{
684 if (vcpu->fpu_active)
685 return;
686 vcpu->fpu_active = 1;
707d92fa 687 vmcs_clear_bits(GUEST_CR0, X86_CR0_TS);
ad312c7c 688 if (vcpu->arch.cr0 & X86_CR0_TS)
707d92fa 689 vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
5fd86fcf
AK		 690 update_exception_bitmap(vcpu);
691}
692
693static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
694{
695 if (!vcpu->fpu_active)
696 return;
697 vcpu->fpu_active = 0;
707d92fa 698 vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
5fd86fcf
AK		 699 update_exception_bitmap(vcpu);
700}
701
6aa8b732
AK		 702static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
703{
704 return vmcs_readl(GUEST_RFLAGS);
705}
706
707static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
708{
ad312c7c 709 if (vcpu->arch.rmode.active)
053de044 710 rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
6aa8b732
AK		 711 vmcs_writel(GUEST_RFLAGS, rflags);
712}
713
714static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
715{
716 unsigned long rip;
717 u32 interruptibility;
718
5fdbf976 719 rip = kvm_rip_read(vcpu);
6aa8b732 720 rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
5fdbf976 721 kvm_rip_write(vcpu, rip);
6aa8b732
AK		 722
723 /*
724 * We emulated an instruction, so temporary interrupt blocking
725 * should be removed, if set.
726 */
727 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
728 if (interruptibility & 3)
729 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
730 interruptibility & ~3);
ad312c7c 731 vcpu->arch.interrupt_window_open = 1;
6aa8b732
AK		 732}
733
298101da
AK		 734static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
735 bool has_error_code, u32 error_code)
736{
737 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
738 nr | INTR_TYPE_EXCEPTION
2e11384c 739 | (has_error_code ? INTR_INFO_DELIVER_CODE_MASK : 0)
298101da
AK		 740 | INTR_INFO_VALID_MASK);
741 if (has_error_code)
742 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
743}
744
745static bool vmx_exception_injected(struct kvm_vcpu *vcpu)
746{
747 struct vcpu_vmx *vmx = to_vmx(vcpu);
748
749 return !(vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK);
750}
751
a75beee6
ED		 752/*
753 * Swap MSR entry in host/guest MSR entry array.
754 */
54e11fa1 755#ifdef CONFIG_X86_64
8b9cf98c 756static void move_msr_up(struct vcpu_vmx *vmx, int from, int to)
a75beee6 757{
a2fa3e9f
GH		 758 struct kvm_msr_entry tmp;
759
760 tmp = vmx->guest_msrs[to];
761 vmx->guest_msrs[to] = vmx->guest_msrs[from];
762 vmx->guest_msrs[from] = tmp;
763 tmp = vmx->host_msrs[to];
764 vmx->host_msrs[to] = vmx->host_msrs[from];
765 vmx->host_msrs[from] = tmp;
a75beee6 766}
54e11fa1 767#endif
a75beee6 768
e38aea3e
AK		 769/*
770 * Set up the vmcs to automatically save and restore system
771 * msrs. Don't touch the 64-bit msrs if the guest is in legacy
772 * mode, as fiddling with msrs is very expensive.
773 */
8b9cf98c 774static void setup_msrs(struct vcpu_vmx *vmx)
e38aea3e 775{
2cc51560 776 int save_nmsrs;
e38aea3e 777
33f9c505 778 vmx_load_host_state(vmx);
a75beee6
ED		 779 save_nmsrs = 0;
780#ifdef CONFIG_X86_64
8b9cf98c 781 if (is_long_mode(&vmx->vcpu)) {
2cc51560
ED		 782 int index;
783
8b9cf98c 784 index = __find_msr_index(vmx, MSR_SYSCALL_MASK);
a75beee6 785 if (index >= 0)
8b9cf98c
RR		 786 move_msr_up(vmx, index, save_nmsrs++);
787 index = __find_msr_index(vmx, MSR_LSTAR);
a75beee6 788 if (index >= 0)
8b9cf98c
RR		 789 move_msr_up(vmx, index, save_nmsrs++);
790 index = __find_msr_index(vmx, MSR_CSTAR);
a75beee6 791 if (index >= 0)
8b9cf98c
RR		 792 move_msr_up(vmx, index, save_nmsrs++);
793 index = __find_msr_index(vmx, MSR_KERNEL_GS_BASE);
a75beee6 794 if (index >= 0)
8b9cf98c 795 move_msr_up(vmx, index, save_nmsrs++);
a75beee6
ED		 796 /*
797 * MSR_K6_STAR is only needed on long mode guests, and only
798 * if efer.sce is enabled.
799 */
8b9cf98c 800 index = __find_msr_index(vmx, MSR_K6_STAR);
ad312c7c 801 if ((index >= 0) && (vmx->vcpu.arch.shadow_efer & EFER_SCE))
8b9cf98c 802 move_msr_up(vmx, index, save_nmsrs++);
a75beee6
ED		 803 }
804#endif
a2fa3e9f 805 vmx->save_nmsrs = save_nmsrs;
e38aea3e 806
4d56c8a7 807#ifdef CONFIG_X86_64
a2fa3e9f 808 vmx->msr_offset_kernel_gs_base =
8b9cf98c 809 __find_msr_index(vmx, MSR_KERNEL_GS_BASE);
4d56c8a7 810#endif
8b9cf98c 811 vmx->msr_offset_efer = __find_msr_index(vmx, MSR_EFER);
e38aea3e
AK		 812}
813
6aa8b732
AK		 814/*
815 * reads and returns guest's timestamp counter "register"
816 * guest_tsc = host_tsc + tsc_offset -- 21.3
817 */
818static u64 guest_read_tsc(void)
819{
820 u64 host_tsc, tsc_offset;
821
822 rdtscll(host_tsc);
823 tsc_offset = vmcs_read64(TSC_OFFSET);
824 return host_tsc + tsc_offset;
825}
826
827/*
828 * writes 'guest_tsc' into guest's timestamp counter "register"
829 * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc
830 */
831static void guest_write_tsc(u64 guest_tsc)
832{
833 u64 host_tsc;
834
835 rdtscll(host_tsc);
836 vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc);
837}
838
6aa8b732
AK		 839/*
840 * Reads an msr value (of 'msr_index') into 'pdata'.
841 * Returns 0 on success, non-0 otherwise.
842 * Assumes vcpu_load() was already called.
843 */
844static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
845{
846 u64 data;
a2fa3e9f 847 struct kvm_msr_entry *msr;
6aa8b732
AK		 848
849 if (!pdata) {
850 printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
851 return -EINVAL;
852 }
853
854 switch (msr_index) {
05b3e0c2 855#ifdef CONFIG_X86_64
6aa8b732
AK		 856 case MSR_FS_BASE:
857 data = vmcs_readl(GUEST_FS_BASE);
858 break;
859 case MSR_GS_BASE:
860 data = vmcs_readl(GUEST_GS_BASE);
861 break;
862 case MSR_EFER:
3bab1f5d 863 return kvm_get_msr_common(vcpu, msr_index, pdata);
6aa8b732
AK		 864#endif
865 case MSR_IA32_TIME_STAMP_COUNTER:
866 data = guest_read_tsc();
867 break;
868 case MSR_IA32_SYSENTER_CS:
869 data = vmcs_read32(GUEST_SYSENTER_CS);
870 break;
871 case MSR_IA32_SYSENTER_EIP:
f5b42c33 872 data = vmcs_readl(GUEST_SYSENTER_EIP);
6aa8b732
AK		 873 break;
874 case MSR_IA32_SYSENTER_ESP:
f5b42c33 875 data = vmcs_readl(GUEST_SYSENTER_ESP);
6aa8b732 876 break;
6aa8b732 877 default:
8b9cf98c 878 msr = find_msr_entry(to_vmx(vcpu), msr_index);
3bab1f5d
AK		 879 if (msr) {
880 data = msr->data;
881 break;
6aa8b732 882 }
3bab1f5d 883 return kvm_get_msr_common(vcpu, msr_index, pdata);
6aa8b732
AK		 884 }
885
886 *pdata = data;
887 return 0;
888}
889
890/*
891 * Writes msr value into into the appropriate "register".
892 * Returns 0 on success, non-0 otherwise.
893 * Assumes vcpu_load() was already called.
894 */
895static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
896{
a2fa3e9f
GH		 897 struct vcpu_vmx *vmx = to_vmx(vcpu);
898 struct kvm_msr_entry *msr;
2cc51560
ED		 899 int ret = 0;
900
6aa8b732 901 switch (msr_index) {
05b3e0c2 902#ifdef CONFIG_X86_64
3bab1f5d 903 case MSR_EFER:
a9b21b62 904 vmx_load_host_state(vmx);
2cc51560 905 ret = kvm_set_msr_common(vcpu, msr_index, data);
2cc51560 906 break;
6aa8b732
AK		 907 case MSR_FS_BASE:
908 vmcs_writel(GUEST_FS_BASE, data);
909 break;
910 case MSR_GS_BASE:
911 vmcs_writel(GUEST_GS_BASE, data);
912 break;
913#endif
914 case MSR_IA32_SYSENTER_CS:
915 vmcs_write32(GUEST_SYSENTER_CS, data);
916 break;
917 case MSR_IA32_SYSENTER_EIP:
f5b42c33 918 vmcs_writel(GUEST_SYSENTER_EIP, data);
6aa8b732
AK		 919 break;
920 case MSR_IA32_SYSENTER_ESP:
f5b42c33 921 vmcs_writel(GUEST_SYSENTER_ESP, data);
6aa8b732 922 break;
d27d4aca 923 case MSR_IA32_TIME_STAMP_COUNTER:
6aa8b732 924 guest_write_tsc(data);
efa67e0d
CL		 925 break;
926 case MSR_P6_PERFCTR0:
927 case MSR_P6_PERFCTR1:
928 case MSR_P6_EVNTSEL0:
929 case MSR_P6_EVNTSEL1:
930 /*
931 * Just discard all writes to the performance counters; this
932 * should keep both older linux and windows 64-bit guests
933 * happy
934 */
935 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: 0x%x data 0x%llx\n", msr_index, data);
936
6aa8b732 937 break;
6aa8b732 938 default:
a9b21b62 939 vmx_load_host_state(vmx);
8b9cf98c 940 msr = find_msr_entry(vmx, msr_index);
3bab1f5d
AK		 941 if (msr) {
942 msr->data = data;
943 break;
6aa8b732 944 }
2cc51560 945 ret = kvm_set_msr_common(vcpu, msr_index, data);
6aa8b732
AK		 946 }
947
2cc51560 948 return ret;
6aa8b732
AK		 949}
950
5fdbf976 951static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
6aa8b732 952{
5fdbf976
MT		 953 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
954 switch (reg) {
955 case VCPU_REGS_RSP:
956 vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
957 break;
958 case VCPU_REGS_RIP:
959 vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP);
960 break;
961 default:
962 break;
963 }
6aa8b732
AK		 964}
965
966static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
967{
968 unsigned long dr7 = 0x400;
6aa8b732
AK		 969 int old_singlestep;
970
6aa8b732
AK		 971 old_singlestep = vcpu->guest_debug.singlestep;
972
973 vcpu->guest_debug.enabled = dbg->enabled;
974 if (vcpu->guest_debug.enabled) {
975 int i;
976
977 dr7 |= 0x200; /* exact */
978 for (i = 0; i < 4; ++i) {
979 if (!dbg->breakpoints[i].enabled)
980 continue;
981 vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
982 dr7 |= 2 << (i*2); /* global enable */
983 dr7 |= 0 << (i*4+16); /* execution breakpoint */
984 }
985
6aa8b732 986 vcpu->guest_debug.singlestep = dbg->singlestep;
abd3f2d6 987 } else
6aa8b732 988 vcpu->guest_debug.singlestep = 0;
6aa8b732
AK		 989
990 if (old_singlestep && !vcpu->guest_debug.singlestep) {
991 unsigned long flags;
992
993 flags = vmcs_readl(GUEST_RFLAGS);
994 flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
995 vmcs_writel(GUEST_RFLAGS, flags);
996 }
997
abd3f2d6 998 update_exception_bitmap(vcpu);
6aa8b732
AK		 999 vmcs_writel(GUEST_DR7, dr7);
1000
1001 return 0;
1002}
1003
2a8067f1
ED		 1004static int vmx_get_irq(struct kvm_vcpu *vcpu)
1005{
1155f76a 1006 struct vcpu_vmx *vmx = to_vmx(vcpu);
2a8067f1
ED		 1007 u32 idtv_info_field;
1008
1155f76a 1009 idtv_info_field = vmx->idt_vectoring_info;
2a8067f1
ED		 1010 if (idtv_info_field & INTR_INFO_VALID_MASK) {
1011 if (is_external_interrupt(idtv_info_field))
1012 return idtv_info_field & VECTORING_INFO_VECTOR_MASK;
1013 else
d77c26fc 1014 printk(KERN_DEBUG "pending exception: not handled yet\n");
2a8067f1
ED		 1015 }
1016 return -1;
1017}
1018
6aa8b732
AK		 1019static __init int cpu_has_kvm_support(void)
1020{
1021 unsigned long ecx = cpuid_ecx(1);
1022 return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */
1023}
1024
1025static __init int vmx_disabled_by_bios(void)
1026{
1027 u64 msr;
1028
1029 rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
ca60dfbb
SY		 1030 return (msr & (IA32_FEATURE_CONTROL_LOCKED_BIT |
1031 IA32_FEATURE_CONTROL_VMXON_ENABLED_BIT))
1032 == IA32_FEATURE_CONTROL_LOCKED_BIT;
62b3ffb8 1033 /* locked but not enabled */
6aa8b732
AK		 1034}
1035
774c47f1 1036static void hardware_enable(void *garbage)
6aa8b732
AK		 1037{
1038 int cpu = raw_smp_processor_id();
1039 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
1040 u64 old;
1041
543e4243 1042 INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu));
6aa8b732 1043 rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
ca60dfbb
SY		 1044 if ((old & (IA32_FEATURE_CONTROL_LOCKED_BIT |
1045 IA32_FEATURE_CONTROL_VMXON_ENABLED_BIT))
1046 != (IA32_FEATURE_CONTROL_LOCKED_BIT |
1047 IA32_FEATURE_CONTROL_VMXON_ENABLED_BIT))
6aa8b732 1048 /* enable and lock */
62b3ffb8 1049 wrmsrl(MSR_IA32_FEATURE_CONTROL, old |
ca60dfbb
SY		 1050 IA32_FEATURE_CONTROL_LOCKED_BIT |
1051 IA32_FEATURE_CONTROL_VMXON_ENABLED_BIT);
66aee91a 1052 write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
4ecac3fd
AK		 1053 asm volatile (ASM_VMX_VMXON_RAX
1054 : : "a"(&phys_addr), "m"(phys_addr)
6aa8b732
AK		 1055 : "memory", "cc");
1056}
1057
543e4243
AK		 1058static void vmclear_local_vcpus(void)
1059{
1060 int cpu = raw_smp_processor_id();
1061 struct vcpu_vmx *vmx, *n;
1062
1063 list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu),
1064 local_vcpus_link)
1065 __vcpu_clear(vmx);
1066}
1067
6aa8b732
AK		 1068static void hardware_disable(void *garbage)
1069{
543e4243 1070 vmclear_local_vcpus();
4ecac3fd 1071 asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc");
e693d71b 1072 write_cr4(read_cr4() & ~X86_CR4_VMXE);
6aa8b732
AK		 1073}
1074
1c3d14fe 1075static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
d77c26fc 1076 u32 msr, u32 *result)
1c3d14fe
YS		 1077{
1078 u32 vmx_msr_low, vmx_msr_high;
1079 u32 ctl = ctl_min | ctl_opt;
1080
1081 rdmsr(msr, vmx_msr_low, vmx_msr_high);
1082
1083 ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */
1084 ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */
1085
1086 /* Ensure minimum (required) set of control bits are supported. */
1087 if (ctl_min & ~ctl)
002c7f7c 1088 return -EIO;
1c3d14fe
YS		 1089
1090 *result = ctl;
1091 return 0;
1092}
1093
002c7f7c 1094static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
6aa8b732
AK		 1095{
1096 u32 vmx_msr_low, vmx_msr_high;
d56f546d 1097 u32 min, opt, min2, opt2;
1c3d14fe
YS		 1098 u32 _pin_based_exec_control = 0;
1099 u32 _cpu_based_exec_control = 0;
f78e0e2e 1100 u32 _cpu_based_2nd_exec_control = 0;
1c3d14fe
YS		 1101 u32 _vmexit_control = 0;
1102 u32 _vmentry_control = 0;
1103
1104 min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING;
f08864b4 1105 opt = PIN_BASED_VIRTUAL_NMIS;
1c3d14fe
YS		 1106 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS,
1107 &_pin_based_exec_control) < 0)
002c7f7c 1108 return -EIO;
1c3d14fe
YS		 1109
1110 min = CPU_BASED_HLT_EXITING |
1111#ifdef CONFIG_X86_64
1112 CPU_BASED_CR8_LOAD_EXITING |
1113 CPU_BASED_CR8_STORE_EXITING |
1114#endif
d56f546d
SY		 1115 CPU_BASED_CR3_LOAD_EXITING |
1116 CPU_BASED_CR3_STORE_EXITING |
1c3d14fe
YS		 1117 CPU_BASED_USE_IO_BITMAPS |
1118 CPU_BASED_MOV_DR_EXITING |
1119 CPU_BASED_USE_TSC_OFFSETING;
f78e0e2e 1120 opt = CPU_BASED_TPR_SHADOW |
25c5f225 1121 CPU_BASED_USE_MSR_BITMAPS |
f78e0e2e 1122 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
1c3d14fe
YS		 1123 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
1124 &_cpu_based_exec_control) < 0)
002c7f7c 1125 return -EIO;
6e5d865c
YS		 1126#ifdef CONFIG_X86_64
1127 if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
1128 _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
1129 ~CPU_BASED_CR8_STORE_EXITING;
1130#endif
f78e0e2e 1131 if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
d56f546d
SY		 1132 min2 = 0;
1133 opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
2384d2b3 1134 SECONDARY_EXEC_WBINVD_EXITING |
d56f546d
SY		 1135 SECONDARY_EXEC_ENABLE_VPID |
1136 SECONDARY_EXEC_ENABLE_EPT;
1137 if (adjust_vmx_controls(min2, opt2,
1138 MSR_IA32_VMX_PROCBASED_CTLS2,
f78e0e2e
SY		 1139 &_cpu_based_2nd_exec_control) < 0)
1140 return -EIO;
1141 }
1142#ifndef CONFIG_X86_64
1143 if (!(_cpu_based_2nd_exec_control &
1144 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
1145 _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW;
1146#endif
d56f546d
SY		 1147 if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) {
1148 /* CR3 accesses don't need to cause VM Exits when EPT enabled */
1149 min &= ~(CPU_BASED_CR3_LOAD_EXITING |
1150 CPU_BASED_CR3_STORE_EXITING);
1151 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
1152 &_cpu_based_exec_control) < 0)
1153 return -EIO;
1154 rdmsr(MSR_IA32_VMX_EPT_VPID_CAP,
1155 vmx_capability.ept, vmx_capability.vpid);
1156 }
1c3d14fe
YS		 1157
1158 min = 0;
1159#ifdef CONFIG_X86_64
1160 min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
1161#endif
1162 opt = 0;
1163 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
1164 &_vmexit_control) < 0)
002c7f7c 1165 return -EIO;
1c3d14fe
YS		 1166
1167 min = opt = 0;
1168 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
1169 &_vmentry_control) < 0)
002c7f7c 1170 return -EIO;
6aa8b732 1171
c68876fd 1172 rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
1c3d14fe
YS		 1173
1174 /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
1175 if ((vmx_msr_high & 0x1fff) > PAGE_SIZE)
002c7f7c 1176 return -EIO;
1c3d14fe
YS		 1177
1178#ifdef CONFIG_X86_64
1179 /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */
1180 if (vmx_msr_high & (1u<<16))
002c7f7c 1181 return -EIO;
1c3d14fe
YS		 1182#endif
1183
1184 /* Require Write-Back (WB) memory type for VMCS accesses. */
1185 if (((vmx_msr_high >> 18) & 15) != 6)
002c7f7c 1186 return -EIO;
1c3d14fe 1187
002c7f7c
YS		 1188 vmcs_conf->size = vmx_msr_high & 0x1fff;
1189 vmcs_conf->order = get_order(vmcs_config.size);
1190 vmcs_conf->revision_id = vmx_msr_low;
1c3d14fe 1191
002c7f7c
YS		 1192 vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
1193 vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
f78e0e2e 1194 vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control;
002c7f7c
YS		 1195 vmcs_conf->vmexit_ctrl = _vmexit_control;
1196 vmcs_conf->vmentry_ctrl = _vmentry_control;
1c3d14fe
YS		 1197
1198 return 0;
c68876fd 1199}
6aa8b732
AK		 1200
1201static struct vmcs *alloc_vmcs_cpu(int cpu)
1202{
1203 int node = cpu_to_node(cpu);
1204 struct page *pages;
1205 struct vmcs *vmcs;
1206
1c3d14fe 1207 pages = alloc_pages_node(node, GFP_KERNEL, vmcs_config.order);
6aa8b732
AK		 1208 if (!pages)
1209 return NULL;
1210 vmcs = page_address(pages);
1c3d14fe
YS		 1211 memset(vmcs, 0, vmcs_config.size);
1212 vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */
6aa8b732
AK		 1213 return vmcs;
1214}
1215
1216static struct vmcs *alloc_vmcs(void)
1217{
d3b2c338 1218 return alloc_vmcs_cpu(raw_smp_processor_id());
6aa8b732
AK		 1219}
1220
1221static void free_vmcs(struct vmcs *vmcs)
1222{
1c3d14fe 1223 free_pages((unsigned long)vmcs, vmcs_config.order);
6aa8b732
AK		 1224}
1225
39959588 1226static void free_kvm_area(void)
6aa8b732
AK		 1227{
1228 int cpu;
1229
1230 for_each_online_cpu(cpu)
1231 free_vmcs(per_cpu(vmxarea, cpu));
1232}
1233
6aa8b732
AK		 1234static __init int alloc_kvm_area(void)
1235{
1236 int cpu;
1237
1238 for_each_online_cpu(cpu) {
1239 struct vmcs *vmcs;
1240
1241 vmcs = alloc_vmcs_cpu(cpu);
1242 if (!vmcs) {
1243 free_kvm_area();
1244 return -ENOMEM;
1245 }
1246
1247 per_cpu(vmxarea, cpu) = vmcs;
1248 }
1249 return 0;
1250}
1251
1252static __init int hardware_setup(void)
1253{
002c7f7c
YS		 1254 if (setup_vmcs_config(&vmcs_config) < 0)
1255 return -EIO;
50a37eb4
JR		 1256
1257 if (boot_cpu_has(X86_FEATURE_NX))
1258 kvm_enable_efer_bits(EFER_NX);
1259
6aa8b732
AK		 1260 return alloc_kvm_area();
1261}
1262
1263static __exit void hardware_unsetup(void)
1264{
1265 free_kvm_area();
1266}
1267
6aa8b732
AK		 1268static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save)
1269{
1270 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1271
6af11b9e 1272 if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) {
6aa8b732
AK		 1273 vmcs_write16(sf->selector, save->selector);
1274 vmcs_writel(sf->base, save->base);
1275 vmcs_write32(sf->limit, save->limit);
1276 vmcs_write32(sf->ar_bytes, save->ar);
1277 } else {
1278 u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK)
1279 << AR_DPL_SHIFT;
1280 vmcs_write32(sf->ar_bytes, 0x93 | dpl);
1281 }
1282}
1283
1284static void enter_pmode(struct kvm_vcpu *vcpu)
1285{
1286 unsigned long flags;
1287
ad312c7c 1288 vcpu->arch.rmode.active = 0;
6aa8b732 1289
ad312c7c
ZX		 1290 vmcs_writel(GUEST_TR_BASE, vcpu->arch.rmode.tr.base);
1291 vmcs_write32(GUEST_TR_LIMIT, vcpu->arch.rmode.tr.limit);
1292 vmcs_write32(GUEST_TR_AR_BYTES, vcpu->arch.rmode.tr.ar);
6aa8b732
AK		 1293
1294 flags = vmcs_readl(GUEST_RFLAGS);
053de044 1295 flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM);
ad312c7c 1296 flags |= (vcpu->arch.rmode.save_iopl << IOPL_SHIFT);
6aa8b732
AK		 1297 vmcs_writel(GUEST_RFLAGS, flags);
1298
66aee91a
RR		 1299 vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
1300 (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
6aa8b732
AK		 1301
1302 update_exception_bitmap(vcpu);
1303
ad312c7c
ZX		 1304 fix_pmode_dataseg(VCPU_SREG_ES, &vcpu->arch.rmode.es);
1305 fix_pmode_dataseg(VCPU_SREG_DS, &vcpu->arch.rmode.ds);
1306 fix_pmode_dataseg(VCPU_SREG_GS, &vcpu->arch.rmode.gs);
1307 fix_pmode_dataseg(VCPU_SREG_FS, &vcpu->arch.rmode.fs);
6aa8b732
AK		 1308
1309 vmcs_write16(GUEST_SS_SELECTOR, 0);
1310 vmcs_write32(GUEST_SS_AR_BYTES, 0x93);
1311
1312 vmcs_write16(GUEST_CS_SELECTOR,
1313 vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK);
1314 vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
1315}
1316
d77c26fc 1317static gva_t rmode_tss_base(struct kvm *kvm)
6aa8b732 1318{
bfc6d222 1319 if (!kvm->arch.tss_addr) {
cbc94022
IE		 1320 gfn_t base_gfn = kvm->memslots[0].base_gfn +
1321 kvm->memslots[0].npages - 3;
1322 return base_gfn << PAGE_SHIFT;
1323 }
bfc6d222 1324 return kvm->arch.tss_addr;
6aa8b732
AK		 1325}
1326
1327static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
1328{
1329 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1330
1331 save->selector = vmcs_read16(sf->selector);
1332 save->base = vmcs_readl(sf->base);
1333 save->limit = vmcs_read32(sf->limit);
1334 save->ar = vmcs_read32(sf->ar_bytes);
15b00f32
JK		 1335 vmcs_write16(sf->selector, save->base >> 4);
1336 vmcs_write32(sf->base, save->base & 0xfffff);
6aa8b732
AK		 1337 vmcs_write32(sf->limit, 0xffff);
1338 vmcs_write32(sf->ar_bytes, 0xf3);
1339}
1340
1341static void enter_rmode(struct kvm_vcpu *vcpu)
1342{
1343 unsigned long flags;
1344
ad312c7c 1345 vcpu->arch.rmode.active = 1;
6aa8b732 1346
ad312c7c 1347 vcpu->arch.rmode.tr.base = vmcs_readl(GUEST_TR_BASE);
6aa8b732
AK		 1348 vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));
1349
ad312c7c 1350 vcpu->arch.rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT);
6aa8b732
AK		 1351 vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);
1352
ad312c7c 1353 vcpu->arch.rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES);
6aa8b732
AK		 1354 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
1355
1356 flags = vmcs_readl(GUEST_RFLAGS);
ad312c7c
ZX		 1357 vcpu->arch.rmode.save_iopl
1358 = (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT;
6aa8b732 1359
053de044 1360 flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
6aa8b732
AK		 1361
1362 vmcs_writel(GUEST_RFLAGS, flags);
66aee91a 1363 vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
6aa8b732
AK		 1364 update_exception_bitmap(vcpu);
1365
1366 vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4);
1367 vmcs_write32(GUEST_SS_LIMIT, 0xffff);
1368 vmcs_write32(GUEST_SS_AR_BYTES, 0xf3);
1369
1370 vmcs_write32(GUEST_CS_AR_BYTES, 0xf3);
abacf8df 1371 vmcs_write32(GUEST_CS_LIMIT, 0xffff);
8cb5b033
AK		 1372 if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000)
1373 vmcs_writel(GUEST_CS_BASE, 0xf0000);
6aa8b732
AK		 1374 vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4);
1375
ad312c7c
ZX		 1376 fix_rmode_seg(VCPU_SREG_ES, &vcpu->arch.rmode.es);
1377 fix_rmode_seg(VCPU_SREG_DS, &vcpu->arch.rmode.ds);
1378 fix_rmode_seg(VCPU_SREG_GS, &vcpu->arch.rmode.gs);
1379 fix_rmode_seg(VCPU_SREG_FS, &vcpu->arch.rmode.fs);
75880a01 1380
8668a3c4 1381 kvm_mmu_reset_context(vcpu);
b7ebfb05 1382 init_rmode(vcpu->kvm);
6aa8b732
AK		 1383}
1384
05b3e0c2 1385#ifdef CONFIG_X86_64
6aa8b732
AK		 1386
1387static void enter_lmode(struct kvm_vcpu *vcpu)
1388{
1389 u32 guest_tr_ar;
1390
1391 guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES);
1392 if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) {
1393 printk(KERN_DEBUG "%s: tss fixup for long mode. \n",
b8688d51 1394 __func__);
6aa8b732
AK		 1395 vmcs_write32(GUEST_TR_AR_BYTES,
1396 (guest_tr_ar & ~AR_TYPE_MASK)
1397 | AR_TYPE_BUSY_64_TSS);
1398 }
1399
ad312c7c 1400 vcpu->arch.shadow_efer |= EFER_LMA;
6aa8b732 1401
8b9cf98c 1402 find_msr_entry(to_vmx(vcpu), MSR_EFER)->data |= EFER_LMA | EFER_LME;
6aa8b732
AK		 1403 vmcs_write32(VM_ENTRY_CONTROLS,
1404 vmcs_read32(VM_ENTRY_CONTROLS)
1e4e6e00 1405 | VM_ENTRY_IA32E_MODE);
6aa8b732
AK		 1406}
1407
1408static void exit_lmode(struct kvm_vcpu *vcpu)
1409{
ad312c7c 1410 vcpu->arch.shadow_efer &= ~EFER_LMA;
6aa8b732
AK		 1411
1412 vmcs_write32(VM_ENTRY_CONTROLS,
1413 vmcs_read32(VM_ENTRY_CONTROLS)
1e4e6e00 1414 & ~VM_ENTRY_IA32E_MODE);
6aa8b732
AK		 1415}
1416
1417#endif
1418
2384d2b3
SY		 1419static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
1420{
1421 vpid_sync_vcpu_all(to_vmx(vcpu));
4e1096d2
SY		 1422 if (vm_need_ept())
1423 ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa));
2384d2b3
SY		 1424}
1425
25c4c276 1426static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
399badf3 1427{
ad312c7c
ZX		 1428 vcpu->arch.cr4 &= KVM_GUEST_CR4_MASK;
1429 vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK;
399badf3
AK		 1430}
1431
1439442c
SY		 1432static void ept_load_pdptrs(struct kvm_vcpu *vcpu)
1433{
1434 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
1435 if (!load_pdptrs(vcpu, vcpu->arch.cr3)) {
1436 printk(KERN_ERR "EPT: Fail to load pdptrs!\n");
1437 return;
1438 }
1439 vmcs_write64(GUEST_PDPTR0, vcpu->arch.pdptrs[0]);
1440 vmcs_write64(GUEST_PDPTR1, vcpu->arch.pdptrs[1]);
1441 vmcs_write64(GUEST_PDPTR2, vcpu->arch.pdptrs[2]);
1442 vmcs_write64(GUEST_PDPTR3, vcpu->arch.pdptrs[3]);
1443 }
1444}
1445
1446static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
1447
1448static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
1449 unsigned long cr0,
1450 struct kvm_vcpu *vcpu)
1451{
1452 if (!(cr0 & X86_CR0_PG)) {
1453 /* From paging/starting to nonpaging */
1454 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
65267ea1 1455 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
1439442c
SY		 1456 (CPU_BASED_CR3_LOAD_EXITING |
1457 CPU_BASED_CR3_STORE_EXITING));
1458 vcpu->arch.cr0 = cr0;
1459 vmx_set_cr4(vcpu, vcpu->arch.cr4);
1460 *hw_cr0 |= X86_CR0_PE | X86_CR0_PG;
1461 *hw_cr0 &= ~X86_CR0_WP;
1462 } else if (!is_paging(vcpu)) {
1463 /* From nonpaging to paging */
1464 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
65267ea1 1465 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
1439442c
SY		 1466 ~(CPU_BASED_CR3_LOAD_EXITING |
1467 CPU_BASED_CR3_STORE_EXITING));
1468 vcpu->arch.cr0 = cr0;
1469 vmx_set_cr4(vcpu, vcpu->arch.cr4);
1470 if (!(vcpu->arch.cr0 & X86_CR0_WP))
1471 *hw_cr0 &= ~X86_CR0_WP;
1472 }
1473}
1474
1475static void ept_update_paging_mode_cr4(unsigned long *hw_cr4,
1476 struct kvm_vcpu *vcpu)
1477{
1478 if (!is_paging(vcpu)) {
1479 *hw_cr4 &= ~X86_CR4_PAE;
1480 *hw_cr4 |= X86_CR4_PSE;
1481 } else if (!(vcpu->arch.cr4 & X86_CR4_PAE))
1482 *hw_cr4 &= ~X86_CR4_PAE;
1483}
1484
6aa8b732
AK		 1485static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
1486{
1439442c
SY		 1487 unsigned long hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) |
1488 KVM_VM_CR0_ALWAYS_ON;
1489
5fd86fcf
AK		 1490 vmx_fpu_deactivate(vcpu);
1491
ad312c7c 1492 if (vcpu->arch.rmode.active && (cr0 & X86_CR0_PE))
6aa8b732
AK		 1493 enter_pmode(vcpu);
1494
ad312c7c 1495 if (!vcpu->arch.rmode.active && !(cr0 & X86_CR0_PE))
6aa8b732
AK		 1496 enter_rmode(vcpu);
1497
05b3e0c2 1498#ifdef CONFIG_X86_64
ad312c7c 1499 if (vcpu->arch.shadow_efer & EFER_LME) {
707d92fa 1500 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
6aa8b732 1501 enter_lmode(vcpu);
707d92fa 1502 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
6aa8b732
AK		 1503 exit_lmode(vcpu);
1504 }
1505#endif
1506
1439442c
SY		 1507 if (vm_need_ept())
1508 ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu);
1509
6aa8b732 1510 vmcs_writel(CR0_READ_SHADOW, cr0);
1439442c 1511 vmcs_writel(GUEST_CR0, hw_cr0);
ad312c7c 1512 vcpu->arch.cr0 = cr0;
5fd86fcf 1513
707d92fa 1514 if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE))
5fd86fcf 1515 vmx_fpu_activate(vcpu);
6aa8b732
AK		 1516}
1517
1439442c
SY		 1518static u64 construct_eptp(unsigned long root_hpa)
1519{
1520 u64 eptp;
1521
1522 /* TODO write the value reading from MSR */
1523 eptp = VMX_EPT_DEFAULT_MT |
1524 VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT;
1525 eptp |= (root_hpa & PAGE_MASK);
1526
1527 return eptp;
1528}
1529
6aa8b732
AK		 1530static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
1531{
1439442c
SY		 1532 unsigned long guest_cr3;
1533 u64 eptp;
1534
1535 guest_cr3 = cr3;
1536 if (vm_need_ept()) {
1537 eptp = construct_eptp(cr3);
1538 vmcs_write64(EPT_POINTER, eptp);
1539 ept_sync_context(eptp);
1540 ept_load_pdptrs(vcpu);
1541 guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 :
1542 VMX_EPT_IDENTITY_PAGETABLE_ADDR;
1543 }
1544
2384d2b3 1545 vmx_flush_tlb(vcpu);
1439442c 1546 vmcs_writel(GUEST_CR3, guest_cr3);
ad312c7c 1547 if (vcpu->arch.cr0 & X86_CR0_PE)
5fd86fcf 1548 vmx_fpu_deactivate(vcpu);
6aa8b732
AK		 1549}
1550
1551static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
1552{
1439442c
SY		 1553 unsigned long hw_cr4 = cr4 | (vcpu->arch.rmode.active ?
1554 KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);
1555
ad312c7c 1556 vcpu->arch.cr4 = cr4;
1439442c
SY		 1557 if (vm_need_ept())
1558 ept_update_paging_mode_cr4(&hw_cr4, vcpu);
1559
1560 vmcs_writel(CR4_READ_SHADOW, cr4);
1561 vmcs_writel(GUEST_CR4, hw_cr4);
6aa8b732
AK		 1562}
1563
6aa8b732
AK		 1564static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
1565{
8b9cf98c
RR		 1566 struct vcpu_vmx *vmx = to_vmx(vcpu);
1567 struct kvm_msr_entry *msr = find_msr_entry(vmx, MSR_EFER);
6aa8b732 1568
ad312c7c 1569 vcpu->arch.shadow_efer = efer;
9f62e19a
JR		 1570 if (!msr)
1571 return;
6aa8b732
AK		 1572 if (efer & EFER_LMA) {
1573 vmcs_write32(VM_ENTRY_CONTROLS,
1574 vmcs_read32(VM_ENTRY_CONTROLS) |
1e4e6e00 1575 VM_ENTRY_IA32E_MODE);
6aa8b732
AK		 1576 msr->data = efer;
1577
1578 } else {
1579 vmcs_write32(VM_ENTRY_CONTROLS,
1580 vmcs_read32(VM_ENTRY_CONTROLS) &
1e4e6e00 1581 ~VM_ENTRY_IA32E_MODE);
6aa8b732
AK		 1582
1583 msr->data = efer & ~EFER_LME;
1584 }
8b9cf98c 1585 setup_msrs(vmx);
6aa8b732
AK		 1586}
1587
6aa8b732
AK		 1588static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg)
1589{
1590 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1591
1592 return vmcs_readl(sf->base);
1593}
1594
1595static void vmx_get_segment(struct kvm_vcpu *vcpu,
1596 struct kvm_segment *var, int seg)
1597{
1598 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1599 u32 ar;
1600
1601 var->base = vmcs_readl(sf->base);
1602 var->limit = vmcs_read32(sf->limit);
1603 var->selector = vmcs_read16(sf->selector);
1604 ar = vmcs_read32(sf->ar_bytes);
1605 if (ar & AR_UNUSABLE_MASK)
1606 ar = 0;
1607 var->type = ar & 15;
1608 var->s = (ar >> 4) & 1;
1609 var->dpl = (ar >> 5) & 3;
1610 var->present = (ar >> 7) & 1;
1611 var->avl = (ar >> 12) & 1;
1612 var->l = (ar >> 13) & 1;
1613 var->db = (ar >> 14) & 1;
1614 var->g = (ar >> 15) & 1;
1615 var->unusable = (ar >> 16) & 1;
1616}
1617
2e4d2653
IE		 1618static int vmx_get_cpl(struct kvm_vcpu *vcpu)
1619{
1620 struct kvm_segment kvm_seg;
1621
1622 if (!(vcpu->arch.cr0 & X86_CR0_PE)) /* if real mode */
1623 return 0;
1624
1625 if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */
1626 return 3;
1627
1628 vmx_get_segment(vcpu, &kvm_seg, VCPU_SREG_CS);
1629 return kvm_seg.selector & 3;
1630}
1631
653e3108 1632static u32 vmx_segment_access_rights(struct kvm_segment *var)
6aa8b732 1633{
6aa8b732
AK		 1634 u32 ar;
1635
653e3108 1636 if (var->unusable)
6aa8b732
AK		 1637 ar = 1 << 16;
1638 else {
1639 ar = var->type & 15;
1640 ar |= (var->s & 1) << 4;
1641 ar |= (var->dpl & 3) << 5;
1642 ar |= (var->present & 1) << 7;
1643 ar |= (var->avl & 1) << 12;
1644 ar |= (var->l & 1) << 13;
1645 ar |= (var->db & 1) << 14;
1646 ar |= (var->g & 1) << 15;
1647 }
f7fbf1fd
UL		 1648 if (ar == 0) /* a 0 value means unusable */
1649 ar = AR_UNUSABLE_MASK;
653e3108
AK		 1650
1651 return ar;
1652}
1653
1654static void vmx_set_segment(struct kvm_vcpu *vcpu,
1655 struct kvm_segment *var, int seg)
1656{
1657 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1658 u32 ar;
1659
ad312c7c
ZX		 1660 if (vcpu->arch.rmode.active && seg == VCPU_SREG_TR) {
1661 vcpu->arch.rmode.tr.selector = var->selector;
1662 vcpu->arch.rmode.tr.base = var->base;
1663 vcpu->arch.rmode.tr.limit = var->limit;
1664 vcpu->arch.rmode.tr.ar = vmx_segment_access_rights(var);
653e3108
AK		 1665 return;
1666 }
1667 vmcs_writel(sf->base, var->base);
1668 vmcs_write32(sf->limit, var->limit);
1669 vmcs_write16(sf->selector, var->selector);
ad312c7c 1670 if (vcpu->arch.rmode.active && var->s) {
653e3108
AK		 1671 /*
1672 * Hack real-mode segments into vm86 compatibility.
1673 */
1674 if (var->base == 0xffff0000 && var->selector == 0xf000)
1675 vmcs_writel(sf->base, 0xf0000);
1676 ar = 0xf3;
1677 } else
1678 ar = vmx_segment_access_rights(var);
6aa8b732
AK		 1679 vmcs_write32(sf->ar_bytes, ar);
1680}
1681
6aa8b732
AK		 1682static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
1683{
1684 u32 ar = vmcs_read32(GUEST_CS_AR_BYTES);
1685
1686 *db = (ar >> 14) & 1;
1687 *l = (ar >> 13) & 1;
1688}
1689
1690static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1691{
1692 dt->limit = vmcs_read32(GUEST_IDTR_LIMIT);
1693 dt->base = vmcs_readl(GUEST_IDTR_BASE);
1694}
1695
1696static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1697{
1698 vmcs_write32(GUEST_IDTR_LIMIT, dt->limit);
1699 vmcs_writel(GUEST_IDTR_BASE, dt->base);
1700}
1701
1702static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1703{
1704 dt->limit = vmcs_read32(GUEST_GDTR_LIMIT);
1705 dt->base = vmcs_readl(GUEST_GDTR_BASE);
1706}
1707
1708static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1709{
1710 vmcs_write32(GUEST_GDTR_LIMIT, dt->limit);
1711 vmcs_writel(GUEST_GDTR_BASE, dt->base);
1712}
1713
d77c26fc 1714static int init_rmode_tss(struct kvm *kvm)
6aa8b732 1715{
6aa8b732 1716 gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
195aefde 1717 u16 data = 0;
10589a46 1718 int ret = 0;
195aefde 1719 int r;
6aa8b732 1720
195aefde
IE		 1721 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
1722 if (r < 0)
10589a46 1723 goto out;
195aefde
IE		 1724 data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
1725 r = kvm_write_guest_page(kvm, fn++, &data, 0x66, sizeof(u16));
1726 if (r < 0)
10589a46 1727 goto out;
195aefde
IE		 1728 r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
1729 if (r < 0)
10589a46 1730 goto out;
195aefde
IE		 1731 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
1732 if (r < 0)
10589a46 1733 goto out;
195aefde 1734 data = ~0;
10589a46
MT		 1735 r = kvm_write_guest_page(kvm, fn, &data,
1736 RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
1737 sizeof(u8));
195aefde 1738 if (r < 0)
10589a46
MT		 1739 goto out;
1740
1741 ret = 1;
1742out:
10589a46 1743 return ret;
6aa8b732
AK		 1744}
1745
b7ebfb05
SY		 1746static int init_rmode_identity_map(struct kvm *kvm)
1747{
1748 int i, r, ret;
1749 pfn_t identity_map_pfn;
1750 u32 tmp;
1751
1752 if (!vm_need_ept())
1753 return 1;
1754 if (unlikely(!kvm->arch.ept_identity_pagetable)) {
1755 printk(KERN_ERR "EPT: identity-mapping pagetable "
1756 "haven't been allocated!\n");
1757 return 0;
1758 }
1759 if (likely(kvm->arch.ept_identity_pagetable_done))
1760 return 1;
1761 ret = 0;
1762 identity_map_pfn = VMX_EPT_IDENTITY_PAGETABLE_ADDR >> PAGE_SHIFT;
1763 r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE);
1764 if (r < 0)
1765 goto out;
1766 /* Set up identity-mapping pagetable for EPT in real mode */
1767 for (i = 0; i < PT32_ENT_PER_PAGE; i++) {
1768 tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
1769 _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
1770 r = kvm_write_guest_page(kvm, identity_map_pfn,
1771 &tmp, i * sizeof(tmp), sizeof(tmp));
1772 if (r < 0)
1773 goto out;
1774 }
1775 kvm->arch.ept_identity_pagetable_done = true;
1776 ret = 1;
1777out:
1778 return ret;
1779}
1780
6aa8b732
AK		 1781static void seg_setup(int seg)
1782{
1783 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1784
1785 vmcs_write16(sf->selector, 0);
1786 vmcs_writel(sf->base, 0);
1787 vmcs_write32(sf->limit, 0xffff);
1788 vmcs_write32(sf->ar_bytes, 0x93);
1789}
1790
f78e0e2e
SY		 1791static int alloc_apic_access_page(struct kvm *kvm)
1792{
1793 struct kvm_userspace_memory_region kvm_userspace_mem;
1794 int r = 0;
1795
72dc67a6 1796 down_write(&kvm->slots_lock);
bfc6d222 1797 if (kvm->arch.apic_access_page)
f78e0e2e
SY		 1798 goto out;
1799 kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
1800 kvm_userspace_mem.flags = 0;
1801 kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL;
1802 kvm_userspace_mem.memory_size = PAGE_SIZE;
1803 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
1804 if (r)
1805 goto out;
72dc67a6
IE		 1806
1807 down_read(&current->mm->mmap_sem);
bfc6d222 1808 kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
72dc67a6 1809 up_read(&current->mm->mmap_sem);
f78e0e2e 1810out:
72dc67a6 1811 up_write(&kvm->slots_lock);
f78e0e2e
SY		 1812 return r;
1813}
1814
b7ebfb05
SY		 1815static int alloc_identity_pagetable(struct kvm *kvm)
1816{
1817 struct kvm_userspace_memory_region kvm_userspace_mem;
1818 int r = 0;
1819
1820 down_write(&kvm->slots_lock);
1821 if (kvm->arch.ept_identity_pagetable)
1822 goto out;
1823 kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT;
1824 kvm_userspace_mem.flags = 0;
1825 kvm_userspace_mem.guest_phys_addr = VMX_EPT_IDENTITY_PAGETABLE_ADDR;
1826 kvm_userspace_mem.memory_size = PAGE_SIZE;
1827 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
1828 if (r)
1829 goto out;
1830
1831 down_read(&current->mm->mmap_sem);
1832 kvm->arch.ept_identity_pagetable = gfn_to_page(kvm,
1833 VMX_EPT_IDENTITY_PAGETABLE_ADDR >> PAGE_SHIFT);
1834 up_read(&current->mm->mmap_sem);
1835out:
1836 up_write(&kvm->slots_lock);
1837 return r;
1838}
1839
2384d2b3
SY		 1840static void allocate_vpid(struct vcpu_vmx *vmx)
1841{
1842 int vpid;
1843
1844 vmx->vpid = 0;
1845 if (!enable_vpid || !cpu_has_vmx_vpid())
1846 return;
1847 spin_lock(&vmx_vpid_lock);
1848 vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
1849 if (vpid < VMX_NR_VPIDS) {
1850 vmx->vpid = vpid;
1851 __set_bit(vpid, vmx_vpid_bitmap);
1852 }
1853 spin_unlock(&vmx_vpid_lock);
1854}
1855
8b2cf73c 1856static void vmx_disable_intercept_for_msr(struct page *msr_bitmap, u32 msr)
25c5f225
SY		 1857{
1858 void *va;
1859
1860 if (!cpu_has_vmx_msr_bitmap())
1861 return;
1862
1863 /*
1864 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
1865 * have the write-low and read-high bitmap offsets the wrong way round.
1866 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
1867 */
1868 va = kmap(msr_bitmap);
1869 if (msr <= 0x1fff) {
1870 __clear_bit(msr, va + 0x000); /* read-low */
1871 __clear_bit(msr, va + 0x800); /* write-low */
1872 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
1873 msr &= 0x1fff;
1874 __clear_bit(msr, va + 0x400); /* read-high */
1875 __clear_bit(msr, va + 0xc00); /* write-high */
1876 }
1877 kunmap(msr_bitmap);
1878}
1879
6aa8b732
AK		 1880/*
1881 * Sets up the vmcs for emulated real mode.
1882 */
8b9cf98c 1883static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
6aa8b732
AK		 1884{
1885 u32 host_sysenter_cs;
1886 u32 junk;
1887 unsigned long a;
1888 struct descriptor_table dt;
1889 int i;
cd2276a7 1890 unsigned long kvm_vmx_return;
6e5d865c 1891 u32 exec_control;
6aa8b732 1892
6aa8b732 1893 /* I/O */
fdef3ad1
HQ		 1894 vmcs_write64(IO_BITMAP_A, page_to_phys(vmx_io_bitmap_a));
1895 vmcs_write64(IO_BITMAP_B, page_to_phys(vmx_io_bitmap_b));
6aa8b732 1896
25c5f225
SY		 1897 if (cpu_has_vmx_msr_bitmap())
1898 vmcs_write64(MSR_BITMAP, page_to_phys(vmx_msr_bitmap));
1899
6aa8b732
AK		 1900 vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */
1901
6aa8b732 1902 /* Control */
1c3d14fe
YS		 1903 vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
1904 vmcs_config.pin_based_exec_ctrl);
6e5d865c
YS		 1905
1906 exec_control = vmcs_config.cpu_based_exec_ctrl;
1907 if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) {
1908 exec_control &= ~CPU_BASED_TPR_SHADOW;
1909#ifdef CONFIG_X86_64
1910 exec_control |= CPU_BASED_CR8_STORE_EXITING |
1911 CPU_BASED_CR8_LOAD_EXITING;
1912#endif
1913 }
d56f546d
SY		 1914 if (!vm_need_ept())
1915 exec_control |= CPU_BASED_CR3_STORE_EXITING |
1916 CPU_BASED_CR3_LOAD_EXITING;
6e5d865c 1917 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
6aa8b732 1918
83ff3b9d
SY		 1919 if (cpu_has_secondary_exec_ctrls()) {
1920 exec_control = vmcs_config.cpu_based_2nd_exec_ctrl;
1921 if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
1922 exec_control &=
1923 ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
2384d2b3
SY		 1924 if (vmx->vpid == 0)
1925 exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
d56f546d
SY		 1926 if (!vm_need_ept())
1927 exec_control &= ~SECONDARY_EXEC_ENABLE_EPT;
83ff3b9d
SY		 1928 vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
1929 }
f78e0e2e 1930
c7addb90
AK		 1931 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf);
1932 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf);
6aa8b732
AK		 1933 vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */
1934
1935 vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */
1936 vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */
1937 vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */
1938
1939 vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */
1940 vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
1941 vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */
d6e88aec
AK		 1942 vmcs_write16(HOST_FS_SELECTOR, kvm_read_fs()); /* 22.2.4 */
1943 vmcs_write16(HOST_GS_SELECTOR, kvm_read_gs()); /* 22.2.4 */
6aa8b732 1944 vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
05b3e0c2 1945#ifdef CONFIG_X86_64
6aa8b732
AK		 1946 rdmsrl(MSR_FS_BASE, a);
1947 vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */
1948 rdmsrl(MSR_GS_BASE, a);
1949 vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */
1950#else
1951 vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */
1952 vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */
1953#endif
1954
1955 vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */
1956
d6e88aec 1957 kvm_get_idt(&dt);
6aa8b732
AK		 1958 vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */
1959
d77c26fc 1960 asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return));
cd2276a7 1961 vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */
2cc51560
ED		 1962 vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
1963 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
1964 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
6aa8b732
AK		 1965
1966 rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk);
1967 vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs);
1968 rdmsrl(MSR_IA32_SYSENTER_ESP, a);
1969 vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */
1970 rdmsrl(MSR_IA32_SYSENTER_EIP, a);
1971 vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */
1972
6aa8b732
AK		 1973 for (i = 0; i < NR_VMX_MSR; ++i) {
1974 u32 index = vmx_msr_index[i];
1975 u32 data_low, data_high;
1976 u64 data;
a2fa3e9f 1977 int j = vmx->nmsrs;
6aa8b732
AK		 1978
1979 if (rdmsr_safe(index, &data_low, &data_high) < 0)
1980 continue;
432bd6cb
AK		 1981 if (wrmsr_safe(index, data_low, data_high) < 0)
1982 continue;
6aa8b732 1983 data = data_low | ((u64)data_high << 32);
a2fa3e9f
GH		 1984 vmx->host_msrs[j].index = index;
1985 vmx->host_msrs[j].reserved = 0;
1986 vmx->host_msrs[j].data = data;
1987 vmx->guest_msrs[j] = vmx->host_msrs[j];
1988 ++vmx->nmsrs;
6aa8b732 1989 }
6aa8b732 1990
1c3d14fe 1991 vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl);
6aa8b732
AK		 1992
1993 /* 22.2.1, 20.8.1 */
1c3d14fe
YS		 1994 vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl);
1995
e00c8cf2
AK		 1996 vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
1997 vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK);
1998
f78e0e2e 1999
e00c8cf2
AK		 2000 return 0;
2001}
2002
b7ebfb05
SY		 2003static int init_rmode(struct kvm *kvm)
2004{
2005 if (!init_rmode_tss(kvm))
2006 return 0;
2007 if (!init_rmode_identity_map(kvm))
2008 return 0;
2009 return 1;
2010}
2011
e00c8cf2
AK		 2012static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
2013{
2014 struct vcpu_vmx *vmx = to_vmx(vcpu);
2015 u64 msr;
2016 int ret;
2017
5fdbf976 2018 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP));
3200f405 2019 down_read(&vcpu->kvm->slots_lock);
b7ebfb05 2020 if (!init_rmode(vmx->vcpu.kvm)) {
e00c8cf2
AK		 2021 ret = -ENOMEM;
2022 goto out;
2023 }
2024
ad312c7c 2025 vmx->vcpu.arch.rmode.active = 0;
e00c8cf2 2026
ad312c7c 2027 vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val();
2d3ad1f4 2028 kvm_set_cr8(&vmx->vcpu, 0);
e00c8cf2
AK		 2029 msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
2030 if (vmx->vcpu.vcpu_id == 0)
2031 msr |= MSR_IA32_APICBASE_BSP;
2032 kvm_set_apic_base(&vmx->vcpu, msr);
2033
2034 fx_init(&vmx->vcpu);
2035
2036 /*
2037 * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
2038 * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh.
2039 */
2040 if (vmx->vcpu.vcpu_id == 0) {
2041 vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
2042 vmcs_writel(GUEST_CS_BASE, 0x000f0000);
2043 } else {
ad312c7c
ZX		 2044 vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8);
2045 vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12);
e00c8cf2
AK		 2046 }
2047 vmcs_write32(GUEST_CS_LIMIT, 0xffff);
2048 vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
2049
2050 seg_setup(VCPU_SREG_DS);
2051 seg_setup(VCPU_SREG_ES);
2052 seg_setup(VCPU_SREG_FS);
2053 seg_setup(VCPU_SREG_GS);
2054 seg_setup(VCPU_SREG_SS);
2055
2056 vmcs_write16(GUEST_TR_SELECTOR, 0);
2057 vmcs_writel(GUEST_TR_BASE, 0);
2058 vmcs_write32(GUEST_TR_LIMIT, 0xffff);
2059 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
2060
2061 vmcs_write16(GUEST_LDTR_SELECTOR, 0);
2062 vmcs_writel(GUEST_LDTR_BASE, 0);
2063 vmcs_write32(GUEST_LDTR_LIMIT, 0xffff);
2064 vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082);
2065
2066 vmcs_write32(GUEST_SYSENTER_CS, 0);
2067 vmcs_writel(GUEST_SYSENTER_ESP, 0);
2068 vmcs_writel(GUEST_SYSENTER_EIP, 0);
2069
2070 vmcs_writel(GUEST_RFLAGS, 0x02);
2071 if (vmx->vcpu.vcpu_id == 0)
5fdbf976 2072 kvm_rip_write(vcpu, 0xfff0);
e00c8cf2 2073 else
5fdbf976
MT		 2074 kvm_rip_write(vcpu, 0);
2075 kvm_register_write(vcpu, VCPU_REGS_RSP, 0);
e00c8cf2
AK		 2076
2077 /* todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0 */
2078 vmcs_writel(GUEST_DR7, 0x400);
2079
2080 vmcs_writel(GUEST_GDTR_BASE, 0);
2081 vmcs_write32(GUEST_GDTR_LIMIT, 0xffff);
2082
2083 vmcs_writel(GUEST_IDTR_BASE, 0);
2084 vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
2085
2086 vmcs_write32(GUEST_ACTIVITY_STATE, 0);
2087 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
2088 vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
2089
2090 guest_write_tsc(0);
2091
2092 /* Special registers */
2093 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
2094
2095 setup_msrs(vmx);
2096
6aa8b732
AK		 2097 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */
2098
f78e0e2e
SY		 2099 if (cpu_has_vmx_tpr_shadow()) {
2100 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0);
2101 if (vm_need_tpr_shadow(vmx->vcpu.kvm))
2102 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR,
ad312c7c 2103 page_to_phys(vmx->vcpu.arch.apic->regs_page));
f78e0e2e
SY		 2104 vmcs_write32(TPR_THRESHOLD, 0);
2105 }
2106
2107 if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
2108 vmcs_write64(APIC_ACCESS_ADDR,
bfc6d222 2109 page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
6aa8b732 2110
2384d2b3
SY		 2111 if (vmx->vpid != 0)
2112 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
2113
ad312c7c
ZX		 2114 vmx->vcpu.arch.cr0 = 0x60000010;
2115 vmx_set_cr0(&vmx->vcpu, vmx->vcpu.arch.cr0); /* enter rmode */
8b9cf98c 2116 vmx_set_cr4(&vmx->vcpu, 0);
8b9cf98c 2117 vmx_set_efer(&vmx->vcpu, 0);
8b9cf98c
RR		 2118 vmx_fpu_activate(&vmx->vcpu);
2119 update_exception_bitmap(&vmx->vcpu);
6aa8b732 2120
2384d2b3
SY		 2121 vpid_sync_vcpu_all(vmx);
2122
3200f405 2123 ret = 0;
6aa8b732 2124
6aa8b732 2125out:
3200f405 2126 up_read(&vcpu->kvm->slots_lock);
6aa8b732
AK		 2127 return ret;
2128}
2129
85f455f7
ED		 2130static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq)
2131{
9c8cba37
AK		 2132 struct vcpu_vmx *vmx = to_vmx(vcpu);
2133
2714d1d3
FEL		 2134 KVMTRACE_1D(INJ_VIRQ, vcpu, (u32)irq, handler);
2135
ad312c7c 2136 if (vcpu->arch.rmode.active) {
9c8cba37
AK		 2137 vmx->rmode.irq.pending = true;
2138 vmx->rmode.irq.vector = irq;
5fdbf976 2139 vmx->rmode.irq.rip = kvm_rip_read(vcpu);
9c5623e3
AK		 2140 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2141 irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK);
2142 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1);
5fdbf976 2143 kvm_rip_write(vcpu, vmx->rmode.irq.rip - 1);
85f455f7
ED		 2144 return;
2145 }
2146 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2147 irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
2148}
2149
f08864b4
SY		 2150static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
2151{
2152 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2153 INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
f08864b4
SY		 2154}
2155
6aa8b732
AK		 2156static void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
2157{
ad312c7c
ZX		 2158 int word_index = __ffs(vcpu->arch.irq_summary);
2159 int bit_index = __ffs(vcpu->arch.irq_pending[word_index]);
6aa8b732
AK		 2160 int irq = word_index * BITS_PER_LONG + bit_index;
2161
ad312c7c
ZX		 2162 clear_bit(bit_index, &vcpu->arch.irq_pending[word_index]);
2163 if (!vcpu->arch.irq_pending[word_index])
2164 clear_bit(word_index, &vcpu->arch.irq_summary);
85f455f7 2165 vmx_inject_irq(vcpu, irq);
6aa8b732
AK		 2166}
2167
c1150d8c
DL		 2168
2169static void do_interrupt_requests(struct kvm_vcpu *vcpu,
2170 struct kvm_run *kvm_run)
6aa8b732 2171{
c1150d8c
DL		 2172 u32 cpu_based_vm_exec_control;
2173
ad312c7c 2174 vcpu->arch.interrupt_window_open =
c1150d8c
DL		 2175 ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
2176 (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0);
2177
ad312c7c
ZX		 2178 if (vcpu->arch.interrupt_window_open &&
2179 vcpu->arch.irq_summary &&
c1150d8c 2180 !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK))
6aa8b732 2181 /*
c1150d8c 2182 * If interrupts enabled, and not blocked by sti or mov ss. Good.
6aa8b732
AK		 2183 */
2184 kvm_do_inject_irq(vcpu);
c1150d8c
DL		 2185
2186 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
ad312c7c
ZX		 2187 if (!vcpu->arch.interrupt_window_open &&
2188 (vcpu->arch.irq_summary || kvm_run->request_interrupt_window))
6aa8b732
AK		 2189 /*
2190 * Interrupts blocked. Wait for unblock.
2191 */
c1150d8c
DL		 2192 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
2193 else
2194 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
2195 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
6aa8b732
AK		 2196}
2197
cbc94022
IE		 2198static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
2199{
2200 int ret;
2201 struct kvm_userspace_memory_region tss_mem = {
2202 .slot = 8,
2203 .guest_phys_addr = addr,
2204 .memory_size = PAGE_SIZE * 3,
2205 .flags = 0,
2206 };
2207
2208 ret = kvm_set_memory_region(kvm, &tss_mem, 0);
2209 if (ret)
2210 return ret;
bfc6d222 2211 kvm->arch.tss_addr = addr;
cbc94022
IE		 2212 return 0;
2213}
2214
6aa8b732
AK		 2215static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu)
2216{
2217 struct kvm_guest_debug *dbg = &vcpu->guest_debug;
2218
2219 set_debugreg(dbg->bp[0], 0);
2220 set_debugreg(dbg->bp[1], 1);
2221 set_debugreg(dbg->bp[2], 2);
2222 set_debugreg(dbg->bp[3], 3);
2223
2224 if (dbg->singlestep) {
2225 unsigned long flags;
2226
2227 flags = vmcs_readl(GUEST_RFLAGS);
2228 flags |= X86_EFLAGS_TF | X86_EFLAGS_RF;
2229 vmcs_writel(GUEST_RFLAGS, flags);
2230 }
2231}
2232
2233static int handle_rmode_exception(struct kvm_vcpu *vcpu,
2234 int vec, u32 err_code)
2235{
ad312c7c 2236 if (!vcpu->arch.rmode.active)
6aa8b732
AK		 2237 return 0;
2238
b3f37707
NK		 2239 /*
2240 * Instruction with address size override prefix opcode 0x67
2241 * Cause the #SS fault with 0 error code in VM86 mode.
2242 */
2243 if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
3427318f 2244 if (emulate_instruction(vcpu, NULL, 0, 0, 0) == EMULATE_DONE)
6aa8b732
AK		 2245 return 1;
2246 return 0;
2247}
2248
2249static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2250{
1155f76a 2251 struct vcpu_vmx *vmx = to_vmx(vcpu);
6aa8b732
AK		 2252 u32 intr_info, error_code;
2253 unsigned long cr2, rip;
2254 u32 vect_info;
2255 enum emulation_result er;
2256
1155f76a 2257 vect_info = vmx->idt_vectoring_info;
6aa8b732
AK		 2258 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
2259
2260 if ((vect_info & VECTORING_INFO_VALID_MASK) &&
d77c26fc 2261 !is_page_fault(intr_info))
6aa8b732 2262 printk(KERN_ERR "%s: unexpected, vectoring info 0x%x "
b8688d51 2263 "intr info 0x%x\n", __func__, vect_info, intr_info);
6aa8b732 2264
85f455f7 2265 if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) {
6aa8b732 2266 int irq = vect_info & VECTORING_INFO_VECTOR_MASK;
ad312c7c
ZX		 2267 set_bit(irq, vcpu->arch.irq_pending);
2268 set_bit(irq / BITS_PER_LONG, &vcpu->arch.irq_summary);
6aa8b732
AK		 2269 }
2270
1b6269db
AK		 2271 if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */
2272 return 1; /* already handled by vmx_vcpu_run() */
2ab455cc
AL		 2273
2274 if (is_no_device(intr_info)) {
5fd86fcf 2275 vmx_fpu_activate(vcpu);
2ab455cc
AL		 2276 return 1;
2277 }
2278
7aa81cc0 2279 if (is_invalid_opcode(intr_info)) {
571008da 2280 er = emulate_instruction(vcpu, kvm_run, 0, 0, EMULTYPE_TRAP_UD);
7aa81cc0 2281 if (er != EMULATE_DONE)
7ee5d940 2282 kvm_queue_exception(vcpu, UD_VECTOR);
7aa81cc0
AL		 2283 return 1;
2284 }
2285
6aa8b732 2286 error_code = 0;
5fdbf976 2287 rip = kvm_rip_read(vcpu);
2e11384c 2288 if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
6aa8b732
AK		 2289 error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
2290 if (is_page_fault(intr_info)) {
1439442c
SY		 2291 /* EPT won't cause page fault directly */
2292 if (vm_need_ept())
2293 BUG();
6aa8b732 2294 cr2 = vmcs_readl(EXIT_QUALIFICATION);
2714d1d3
FEL		 2295 KVMTRACE_3D(PAGE_FAULT, vcpu, error_code, (u32)cr2,
2296 (u32)((u64)cr2 >> 32), handler);
577bdc49
AK		 2297 if (vect_info & VECTORING_INFO_VALID_MASK)
2298 kvm_mmu_unprotect_page_virt(vcpu, cr2);
3067714c 2299 return kvm_mmu_page_fault(vcpu, cr2, error_code);
6aa8b732
AK		 2300 }
2301
ad312c7c 2302 if (vcpu->arch.rmode.active &&
6aa8b732 2303 handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
72d6e5a0 2304 error_code)) {
ad312c7c
ZX		 2305 if (vcpu->arch.halt_request) {
2306 vcpu->arch.halt_request = 0;
72d6e5a0
AK		 2307 return kvm_emulate_halt(vcpu);
2308 }
6aa8b732 2309 return 1;
72d6e5a0 2310 }
6aa8b732 2311
d77c26fc
MD		 2312 if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) ==
2313 (INTR_TYPE_EXCEPTION | 1)) {
6aa8b732
AK		 2314 kvm_run->exit_reason = KVM_EXIT_DEBUG;
2315 return 0;
2316 }
2317 kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
2318 kvm_run->ex.exception = intr_info & INTR_INFO_VECTOR_MASK;
2319 kvm_run->ex.error_code = error_code;
2320 return 0;
2321}
2322
2323static int handle_external_interrupt(struct kvm_vcpu *vcpu,
2324 struct kvm_run *kvm_run)
2325{
1165f5fe 2326 ++vcpu->stat.irq_exits;
2714d1d3 2327 KVMTRACE_1D(INTR, vcpu, vmcs_read32(VM_EXIT_INTR_INFO), handler);
6aa8b732
AK		 2328 return 1;
2329}
2330
988ad74f
AK		 2331static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2332{
2333 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
2334 return 0;
2335}
6aa8b732 2336
6aa8b732
AK		 2337static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2338{
bfdaab09 2339 unsigned long exit_qualification;
039576c0
AK		 2340 int size, down, in, string, rep;
2341 unsigned port;
6aa8b732 2342
1165f5fe 2343 ++vcpu->stat.io_exits;
bfdaab09 2344 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
039576c0 2345 string = (exit_qualification & 16) != 0;
e70669ab
LV		 2346
2347 if (string) {
3427318f
LV		 2348 if (emulate_instruction(vcpu,
2349 kvm_run, 0, 0, 0) == EMULATE_DO_MMIO)
e70669ab
LV		 2350 return 0;
2351 return 1;
2352 }
2353
2354 size = (exit_qualification & 7) + 1;
2355 in = (exit_qualification & 8) != 0;
039576c0 2356 down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0;
039576c0
AK		 2357 rep = (exit_qualification & 32) != 0;
2358 port = exit_qualification >> 16;
e70669ab 2359
3090dd73 2360 return kvm_emulate_pio(vcpu, kvm_run, in, size, port);
6aa8b732
AK		 2361}
2362
102d8325
IM		 2363static void
2364vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
2365{
2366 /*
2367 * Patch in the VMCALL instruction:
2368 */
2369 hypercall[0] = 0x0f;
2370 hypercall[1] = 0x01;
2371 hypercall[2] = 0xc1;
102d8325
IM		 2372}
2373
6aa8b732
AK		 2374static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2375{
bfdaab09 2376 unsigned long exit_qualification;
6aa8b732
AK		 2377 int cr;
2378 int reg;
2379
bfdaab09 2380 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
6aa8b732
AK		 2381 cr = exit_qualification & 15;
2382 reg = (exit_qualification >> 8) & 15;
2383 switch ((exit_qualification >> 4) & 3) {
2384 case 0: /* mov to cr */
5fdbf976
MT		 2385 KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr,
2386 (u32)kvm_register_read(vcpu, reg),
2387 (u32)((u64)kvm_register_read(vcpu, reg) >> 32),
2388 handler);
6aa8b732
AK		 2389 switch (cr) {
2390 case 0:
5fdbf976 2391 kvm_set_cr0(vcpu, kvm_register_read(vcpu, reg));
6aa8b732
AK		 2392 skip_emulated_instruction(vcpu);
2393 return 1;
2394 case 3:
5fdbf976 2395 kvm_set_cr3(vcpu, kvm_register_read(vcpu, reg));
6aa8b732
AK		 2396 skip_emulated_instruction(vcpu);
2397 return 1;
2398 case 4:
5fdbf976 2399 kvm_set_cr4(vcpu, kvm_register_read(vcpu, reg));
6aa8b732
AK		 2400 skip_emulated_instruction(vcpu);
2401 return 1;
2402 case 8:
5fdbf976 2403 kvm_set_cr8(vcpu, kvm_register_read(vcpu, reg));
6aa8b732 2404 skip_emulated_instruction(vcpu);
e5314067
AK		 2405 if (irqchip_in_kernel(vcpu->kvm))
2406 return 1;
253abdee
YS		 2407 kvm_run->exit_reason = KVM_EXIT_SET_TPR;
2408 return 0;
6aa8b732
AK		 2409 };
2410 break;
25c4c276 2411 case 2: /* clts */
5fd86fcf 2412 vmx_fpu_deactivate(vcpu);
ad312c7c
ZX		 2413 vcpu->arch.cr0 &= ~X86_CR0_TS;
2414 vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
5fd86fcf 2415 vmx_fpu_activate(vcpu);
2714d1d3 2416 KVMTRACE_0D(CLTS, vcpu, handler);
25c4c276
AL		 2417 skip_emulated_instruction(vcpu);
2418 return 1;
6aa8b732
AK		 2419 case 1: /*mov from cr*/
2420 switch (cr) {
2421 case 3:
5fdbf976 2422 kvm_register_write(vcpu, reg, vcpu->arch.cr3);
2714d1d3 2423 KVMTRACE_3D(CR_READ, vcpu, (u32)cr,
5fdbf976
MT		 2424 (u32)kvm_register_read(vcpu, reg),
2425 (u32)((u64)kvm_register_read(vcpu, reg) >> 32),
2714d1d3 2426 handler);
6aa8b732
AK		 2427 skip_emulated_instruction(vcpu);
2428 return 1;
2429 case 8:
5fdbf976 2430 kvm_register_write(vcpu, reg, kvm_get_cr8(vcpu));
2714d1d3 2431 KVMTRACE_2D(CR_READ, vcpu, (u32)cr,
5fdbf976 2432 (u32)kvm_register_read(vcpu, reg), handler);
6aa8b732
AK		 2433 skip_emulated_instruction(vcpu);
2434 return 1;
2435 }
2436 break;
2437 case 3: /* lmsw */
2d3ad1f4 2438 kvm_lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f);
6aa8b732
AK		 2439
2440 skip_emulated_instruction(vcpu);
2441 return 1;
2442 default:
2443 break;
2444 }
2445 kvm_run->exit_reason = 0;
f0242478 2446 pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
6aa8b732
AK		 2447 (int)(exit_qualification >> 4) & 3, cr);
2448 return 0;
2449}
2450
2451static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2452{
bfdaab09 2453 unsigned long exit_qualification;
6aa8b732
AK		 2454 unsigned long val;
2455 int dr, reg;
2456
2457 /*
2458 * FIXME: this code assumes the host is debugging the guest.
2459 * need to deal with guest debugging itself too.
2460 */
bfdaab09 2461 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
6aa8b732
AK		 2462 dr = exit_qualification & 7;
2463 reg = (exit_qualification >> 8) & 15;
6aa8b732
AK		 2464 if (exit_qualification & 16) {
2465 /* mov from dr */
2466 switch (dr) {
2467 case 6:
2468 val = 0xffff0ff0;
2469 break;
2470 case 7:
2471 val = 0x400;
2472 break;
2473 default:
2474 val = 0;
2475 }
5fdbf976 2476 kvm_register_write(vcpu, reg, val);
2714d1d3 2477 KVMTRACE_2D(DR_READ, vcpu, (u32)dr, (u32)val, handler);
6aa8b732
AK		 2478 } else {
2479 /* mov to dr */
2480 }
6aa8b732
AK		 2481 skip_emulated_instruction(vcpu);
2482 return 1;
2483}
2484
2485static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2486{
06465c5a
AK		 2487 kvm_emulate_cpuid(vcpu);
2488 return 1;
6aa8b732
AK		 2489}
2490
2491static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2492{
ad312c7c 2493 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
6aa8b732
AK		 2494 u64 data;
2495
2496 if (vmx_get_msr(vcpu, ecx, &data)) {
c1a5d4f9 2497 kvm_inject_gp(vcpu, 0);
6aa8b732
AK		 2498 return 1;
2499 }
2500
2714d1d3
FEL		 2501 KVMTRACE_3D(MSR_READ, vcpu, ecx, (u32)data, (u32)(data >> 32),
2502 handler);
2503
6aa8b732 2504 /* FIXME: handling of bits 32:63 of rax, rdx */
ad312c7c
ZX		 2505 vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
2506 vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
6aa8b732
AK		 2507 skip_emulated_instruction(vcpu);
2508 return 1;
2509}
2510
2511static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2512{
ad312c7c
ZX		 2513 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
2514 u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u)
2515 | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32);
6aa8b732 2516
2714d1d3
FEL		 2517 KVMTRACE_3D(MSR_WRITE, vcpu, ecx, (u32)data, (u32)(data >> 32),
2518 handler);
2519
6aa8b732 2520 if (vmx_set_msr(vcpu, ecx, data) != 0) {
c1a5d4f9 2521 kvm_inject_gp(vcpu, 0);
6aa8b732
AK		 2522 return 1;
2523 }
2524
2525 skip_emulated_instruction(vcpu);
2526 return 1;
2527}
2528
6e5d865c
YS		 2529static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu,
2530 struct kvm_run *kvm_run)
2531{
2532 return 1;
2533}
2534
6aa8b732
AK		 2535static int handle_interrupt_window(struct kvm_vcpu *vcpu,
2536 struct kvm_run *kvm_run)
2537{
85f455f7
ED		 2538 u32 cpu_based_vm_exec_control;
2539
2540 /* clear pending irq */
2541 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2542 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
2543 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2714d1d3
FEL		 2544
2545 KVMTRACE_0D(PEND_INTR, vcpu, handler);
2546
c1150d8c
DL		 2547 /*
2548 * If the user space waits to inject interrupts, exit as soon as
2549 * possible
2550 */
2551 if (kvm_run->request_interrupt_window &&
ad312c7c 2552 !vcpu->arch.irq_summary) {
c1150d8c 2553 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
1165f5fe 2554 ++vcpu->stat.irq_window_exits;
c1150d8c
DL		 2555 return 0;
2556 }
6aa8b732
AK		 2557 return 1;
2558}
2559
2560static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2561{
2562 skip_emulated_instruction(vcpu);
d3bef15f 2563 return kvm_emulate_halt(vcpu);
6aa8b732
AK		 2564}
2565
c21415e8
IM		 2566static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2567{
510043da 2568 skip_emulated_instruction(vcpu);
7aa81cc0
AL		 2569 kvm_emulate_hypercall(vcpu);
2570 return 1;
c21415e8
IM		 2571}
2572
e5edaa01
ED		 2573static int handle_wbinvd(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2574{
2575 skip_emulated_instruction(vcpu);
2576 /* TODO: Add support for VT-d/pass-through device */
2577 return 1;
2578}
2579
f78e0e2e
SY		 2580static int handle_apic_access(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2581{
2582 u64 exit_qualification;
2583 enum emulation_result er;
2584 unsigned long offset;
2585
2586 exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
2587 offset = exit_qualification & 0xffful;
2588
2589 er = emulate_instruction(vcpu, kvm_run, 0, 0, 0);
2590
2591 if (er != EMULATE_DONE) {
2592 printk(KERN_ERR
2593 "Fail to handle apic access vmexit! Offset is 0x%lx\n",
2594 offset);
2595 return -ENOTSUPP;
2596 }
2597 return 1;
2598}
2599
37817f29
IE		 2600static int handle_task_switch(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2601{
2602 unsigned long exit_qualification;
2603 u16 tss_selector;
2604 int reason;
2605
2606 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
2607
2608 reason = (u32)exit_qualification >> 30;
2609 tss_selector = exit_qualification;
2610
2611 return kvm_task_switch(vcpu, tss_selector, reason);
2612}
2613
1439442c
SY		 2614static int handle_ept_violation(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2615{
2616 u64 exit_qualification;
2617 enum emulation_result er;
2618 gpa_t gpa;
2619 unsigned long hva;
2620 int gla_validity;
2621 int r;
2622
2623 exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
2624
2625 if (exit_qualification & (1 << 6)) {
2626 printk(KERN_ERR "EPT: GPA exceeds GAW!\n");
2627 return -ENOTSUPP;
2628 }
2629
2630 gla_validity = (exit_qualification >> 7) & 0x3;
2631 if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) {
2632 printk(KERN_ERR "EPT: Handling EPT violation failed!\n");
2633 printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
2634 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
2635 (long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS));
2636 printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
2637 (long unsigned int)exit_qualification);
2638 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
2639 kvm_run->hw.hardware_exit_reason = 0;
2640 return -ENOTSUPP;
2641 }
2642
2643 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
2644 hva = gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT);
2645 if (!kvm_is_error_hva(hva)) {
2646 r = kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, 0);
2647 if (r < 0) {
2648 printk(KERN_ERR "EPT: Not enough memory!\n");
2649 return -ENOMEM;
2650 }
2651 return 1;
2652 } else {
2653 /* must be MMIO */
2654 er = emulate_instruction(vcpu, kvm_run, 0, 0, 0);
2655
2656 if (er == EMULATE_FAIL) {
2657 printk(KERN_ERR
2658 "EPT: Fail to handle EPT violation vmexit!er is %d\n",
2659 er);
2660 printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
2661 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
2662 (long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS));
2663 printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
2664 (long unsigned int)exit_qualification);
2665 return -ENOTSUPP;
2666 } else if (er == EMULATE_DO_MMIO)
2667 return 0;
2668 }
2669 return 1;
2670}
2671
f08864b4
SY		 2672static int handle_nmi_window(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2673{
2674 u32 cpu_based_vm_exec_control;
2675
2676 /* clear pending NMI */
2677 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2678 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
2679 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2680 ++vcpu->stat.nmi_window_exits;
2681
2682 return 1;
2683}
2684
6aa8b732
AK		 2685/*
2686 * The exit handlers return 1 if the exit was handled fully and guest execution
2687 * may resume. Otherwise they set the kvm_run parameter to indicate what needs
2688 * to be done to userspace and return 0.
2689 */
2690static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu,
2691 struct kvm_run *kvm_run) = {
2692 [EXIT_REASON_EXCEPTION_NMI] = handle_exception,
2693 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
988ad74f 2694 [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault,
f08864b4 2695 [EXIT_REASON_NMI_WINDOW] = handle_nmi_window,
6aa8b732 2696 [EXIT_REASON_IO_INSTRUCTION] = handle_io,
6aa8b732
AK		 2697 [EXIT_REASON_CR_ACCESS] = handle_cr,
2698 [EXIT_REASON_DR_ACCESS] = handle_dr,
2699 [EXIT_REASON_CPUID] = handle_cpuid,
2700 [EXIT_REASON_MSR_READ] = handle_rdmsr,
2701 [EXIT_REASON_MSR_WRITE] = handle_wrmsr,
2702 [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
2703 [EXIT_REASON_HLT] = handle_halt,
c21415e8 2704 [EXIT_REASON_VMCALL] = handle_vmcall,
f78e0e2e
SY		 2705 [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold,
2706 [EXIT_REASON_APIC_ACCESS] = handle_apic_access,
e5edaa01 2707 [EXIT_REASON_WBINVD] = handle_wbinvd,
37817f29 2708 [EXIT_REASON_TASK_SWITCH] = handle_task_switch,
1439442c 2709 [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation,
6aa8b732
AK		 2710};
2711
2712static const int kvm_vmx_max_exit_handlers =
50a3485c 2713 ARRAY_SIZE(kvm_vmx_exit_handlers);
6aa8b732
AK		 2714
2715/*
2716 * The guest has exited. See if we can fix it or if we need userspace
2717 * assistance.
2718 */
2719static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
2720{
6aa8b732 2721 u32 exit_reason = vmcs_read32(VM_EXIT_REASON);
29bd8a78 2722 struct vcpu_vmx *vmx = to_vmx(vcpu);
1155f76a 2723 u32 vectoring_info = vmx->idt_vectoring_info;
29bd8a78 2724
5fdbf976
MT		 2725 KVMTRACE_3D(VMEXIT, vcpu, exit_reason, (u32)kvm_rip_read(vcpu),
2726 (u32)((u64)kvm_rip_read(vcpu) >> 32), entryexit);
2714d1d3 2727
1439442c
SY		 2728 /* Access CR3 don't cause VMExit in paging mode, so we need
2729 * to sync with guest real CR3. */
2730 if (vm_need_ept() && is_paging(vcpu)) {
2731 vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
2732 ept_load_pdptrs(vcpu);
2733 }
2734
29bd8a78
AK		 2735 if (unlikely(vmx->fail)) {
2736 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
2737 kvm_run->fail_entry.hardware_entry_failure_reason
2738 = vmcs_read32(VM_INSTRUCTION_ERROR);
2739 return 0;
2740 }
6aa8b732 2741
d77c26fc 2742 if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
1439442c
SY		 2743 (exit_reason != EXIT_REASON_EXCEPTION_NMI &&
2744 exit_reason != EXIT_REASON_EPT_VIOLATION))
6aa8b732 2745 printk(KERN_WARNING "%s: unexpected, valid vectoring info and "
b8688d51 2746 "exit reason is 0x%x\n", __func__, exit_reason);
6aa8b732
AK		 2747 if (exit_reason < kvm_vmx_max_exit_handlers
2748 && kvm_vmx_exit_handlers[exit_reason])
2749 return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run);
2750 else {
2751 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
2752 kvm_run->hw.hardware_exit_reason = exit_reason;
2753 }
2754 return 0;
2755}
2756
6e5d865c
YS		 2757static void update_tpr_threshold(struct kvm_vcpu *vcpu)
2758{
2759 int max_irr, tpr;
2760
2761 if (!vm_need_tpr_shadow(vcpu->kvm))
2762 return;
2763
2764 if (!kvm_lapic_enabled(vcpu) ||
2765 ((max_irr = kvm_lapic_find_highest_irr(vcpu)) == -1)) {
2766 vmcs_write32(TPR_THRESHOLD, 0);
2767 return;
2768 }
2769
2770 tpr = (kvm_lapic_get_cr8(vcpu) & 0x0f) << 4;
2771 vmcs_write32(TPR_THRESHOLD, (max_irr > tpr) ? tpr >> 4 : max_irr >> 4);
2772}
2773
85f455f7
ED		 2774static void enable_irq_window(struct kvm_vcpu *vcpu)
2775{
2776 u32 cpu_based_vm_exec_control;
2777
2778 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2779 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
2780 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2781}
2782
f08864b4
SY		 2783static void enable_nmi_window(struct kvm_vcpu *vcpu)
2784{
2785 u32 cpu_based_vm_exec_control;
2786
2787 if (!cpu_has_virtual_nmis())
2788 return;
2789
2790 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2791 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
2792 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2793}
2794
2795static int vmx_nmi_enabled(struct kvm_vcpu *vcpu)
2796{
2797 u32 guest_intr = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
2798 return !(guest_intr & (GUEST_INTR_STATE_NMI |
2799 GUEST_INTR_STATE_MOV_SS |
2800 GUEST_INTR_STATE_STI));
2801}
2802
2803static int vmx_irq_enabled(struct kvm_vcpu *vcpu)
2804{
2805 u32 guest_intr = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
2806 return (!(guest_intr & (GUEST_INTR_STATE_MOV_SS |
2807 GUEST_INTR_STATE_STI)) &&
2808 (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF));
2809}
2810
2811static void enable_intr_window(struct kvm_vcpu *vcpu)
2812{
2813 if (vcpu->arch.nmi_pending)
2814 enable_nmi_window(vcpu);
2815 else if (kvm_cpu_has_interrupt(vcpu))
2816 enable_irq_window(vcpu);
2817}
2818
cf393f75
AK		 2819static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
2820{
2821 u32 exit_intr_info;
668f612f 2822 u32 idt_vectoring_info;
cf393f75
AK		 2823 bool unblock_nmi;
2824 u8 vector;
668f612f
AK		 2825 int type;
2826 bool idtv_info_valid;
cf393f75
AK		 2827
2828 exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
2829 if (cpu_has_virtual_nmis()) {
2830 unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0;
2831 vector = exit_intr_info & INTR_INFO_VECTOR_MASK;
2832 /*
2833 * SDM 3: 25.7.1.2
2834 * Re-set bit "block by NMI" before VM entry if vmexit caused by
2835 * a guest IRET fault.
2836 */
2837 if (unblock_nmi && vector != DF_VECTOR)
2838 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
2839 GUEST_INTR_STATE_NMI);
2840 }
668f612f
AK		 2841
2842 idt_vectoring_info = vmx->idt_vectoring_info;
2843 idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK;
2844 vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK;
2845 type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK;
2846 if (vmx->vcpu.arch.nmi_injected) {
2847 /*
2848 * SDM 3: 25.7.1.2
2849 * Clear bit "block by NMI" before VM entry if a NMI delivery
2850 * faulted.
2851 */
2852 if (idtv_info_valid && type == INTR_TYPE_NMI_INTR)
2853 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
2854 GUEST_INTR_STATE_NMI);
2855 else
2856 vmx->vcpu.arch.nmi_injected = false;
2857 }
cf393f75
AK		 2858}
2859
85f455f7
ED		 2860static void vmx_intr_assist(struct kvm_vcpu *vcpu)
2861{
1155f76a 2862 struct vcpu_vmx *vmx = to_vmx(vcpu);
668f612f 2863 u32 idtv_info_field, intr_info_field;
1b9778da 2864 int vector;
85f455f7 2865
6e5d865c
YS		 2866 update_tpr_threshold(vcpu);
2867
85f455f7 2868 intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD);
1155f76a 2869 idtv_info_field = vmx->idt_vectoring_info;
85f455f7
ED		 2870 if (intr_info_field & INTR_INFO_VALID_MASK) {
2871 if (idtv_info_field & INTR_INFO_VALID_MASK) {
2872 /* TODO: fault when IDT_Vectoring */
9584bf2c
RH		 2873 if (printk_ratelimit())
2874 printk(KERN_ERR "Fault when IDT_Vectoring\n");
85f455f7 2875 }
f08864b4 2876 enable_intr_window(vcpu);
85f455f7
ED		 2877 return;
2878 }
2879 if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) {
9c8cba37
AK		 2880 if ((idtv_info_field & VECTORING_INFO_TYPE_MASK)
2881 == INTR_TYPE_EXT_INTR
ad312c7c 2882 && vcpu->arch.rmode.active) {
9c8cba37
AK		 2883 u8 vect = idtv_info_field & VECTORING_INFO_VECTOR_MASK;
2884
2885 vmx_inject_irq(vcpu, vect);
f08864b4 2886 enable_intr_window(vcpu);
9c8cba37
AK		 2887 return;
2888 }
2889
2714d1d3
FEL		 2890 KVMTRACE_1D(REDELIVER_EVT, vcpu, idtv_info_field, handler);
2891
f08864b4
SY		 2892 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field
2893 & ~INTR_INFO_RESVD_BITS_MASK);
85f455f7
ED		 2894 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
2895 vmcs_read32(VM_EXIT_INSTRUCTION_LEN));
2896
2e11384c 2897 if (unlikely(idtv_info_field & INTR_INFO_DELIVER_CODE_MASK))
85f455f7
ED		 2898 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE,
2899 vmcs_read32(IDT_VECTORING_ERROR_CODE));
f08864b4 2900 enable_intr_window(vcpu);
85f455f7
ED		 2901 return;
2902 }
f08864b4 2903 if (cpu_has_virtual_nmis()) {
668f612f
AK		 2904 if (vcpu->arch.nmi_pending && !vcpu->arch.nmi_injected) {
2905 if (vmx_nmi_enabled(vcpu)) {
2906 vcpu->arch.nmi_pending = false;
2907 vcpu->arch.nmi_injected = true;
2908 } else {
2909 enable_intr_window(vcpu);
2910 return;
2911 }
2912 }
2913 if (vcpu->arch.nmi_injected) {
2914 vmx_inject_nmi(vcpu);
f08864b4
SY		 2915 enable_intr_window(vcpu);
2916 return;
2917 }
f08864b4
SY		 2918 }
2919 if (!kvm_cpu_has_interrupt(vcpu))
85f455f7 2920 return;
f08864b4 2921 if (vmx_irq_enabled(vcpu)) {
1b9778da
ED		 2922 vector = kvm_cpu_get_interrupt(vcpu);
2923 vmx_inject_irq(vcpu, vector);
2924 kvm_timer_intr_post(vcpu, vector);
2925 } else
85f455f7
ED		 2926 enable_irq_window(vcpu);
2927}
2928
9c8cba37
AK		 2929/*
2930 * Failure to inject an interrupt should give us the information
2931 * in IDT_VECTORING_INFO_FIELD. However, if the failure occurs
2932 * when fetching the interrupt redirection bitmap in the real-mode
2933 * tss, this doesn't happen. So we do it ourselves.
2934 */
2935static void fixup_rmode_irq(struct vcpu_vmx *vmx)
2936{
2937 vmx->rmode.irq.pending = 0;
5fdbf976 2938 if (kvm_rip_read(&vmx->vcpu) + 1 != vmx->rmode.irq.rip)
9c8cba37 2939 return;
5fdbf976 2940 kvm_rip_write(&vmx->vcpu, vmx->rmode.irq.rip);
9c8cba37
AK		 2941 if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) {
2942 vmx->idt_vectoring_info &= ~VECTORING_INFO_TYPE_MASK;
2943 vmx->idt_vectoring_info |= INTR_TYPE_EXT_INTR;
2944 return;
2945 }
2946 vmx->idt_vectoring_info =
2947 VECTORING_INFO_VALID_MASK
2948 | INTR_TYPE_EXT_INTR
2949 | vmx->rmode.irq.vector;
2950}
2951
04d2cc77 2952static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
6aa8b732 2953{
a2fa3e9f 2954 struct vcpu_vmx *vmx = to_vmx(vcpu);
1b6269db 2955 u32 intr_info;
e6adf283 2956
5fdbf976
MT		 2957 if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty))
2958 vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);
2959 if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty))
2960 vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]);
2961
e6adf283
AK		 2962 /*
2963 * Loading guest fpu may have cleared host cr0.ts
2964 */
2965 vmcs_writel(HOST_CR0, read_cr0());
2966
d77c26fc 2967 asm(
6aa8b732 2968 /* Store host registers */
05b3e0c2 2969#ifdef CONFIG_X86_64
c2036300 2970 "push %%rdx; push %%rbp;"
6aa8b732 2971 "push %%rcx \n\t"
6aa8b732 2972#else
ff593e5a
LV		 2973 "push %%edx; push %%ebp;"
2974 "push %%ecx \n\t"
6aa8b732 2975#endif
4ecac3fd 2976 __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
6aa8b732 2977 /* Check if vmlaunch of vmresume is needed */
e08aa78a 2978 "cmpl $0, %c[launched](%0) \n\t"
6aa8b732 2979 /* Load guest registers. Don't clobber flags. */
05b3e0c2 2980#ifdef CONFIG_X86_64
e08aa78a 2981 "mov %c[cr2](%0), %%rax \n\t"
6aa8b732 2982 "mov %%rax, %%cr2 \n\t"
e08aa78a
AK		 2983 "mov %c[rax](%0), %%rax \n\t"
2984 "mov %c[rbx](%0), %%rbx \n\t"
2985 "mov %c[rdx](%0), %%rdx \n\t"
2986 "mov %c[rsi](%0), %%rsi \n\t"
2987 "mov %c[rdi](%0), %%rdi \n\t"
2988 "mov %c[rbp](%0), %%rbp \n\t"
2989 "mov %c[r8](%0), %%r8 \n\t"
2990 "mov %c[r9](%0), %%r9 \n\t"
2991 "mov %c[r10](%0), %%r10 \n\t"
2992 "mov %c[r11](%0), %%r11 \n\t"
2993 "mov %c[r12](%0), %%r12 \n\t"
2994 "mov %c[r13](%0), %%r13 \n\t"
2995 "mov %c[r14](%0), %%r14 \n\t"
2996 "mov %c[r15](%0), %%r15 \n\t"
2997 "mov %c[rcx](%0), %%rcx \n\t" /* kills %0 (rcx) */
6aa8b732 2998#else
e08aa78a 2999 "mov %c[cr2](%0), %%eax \n\t"
6aa8b732 3000 "mov %%eax, %%cr2 \n\t"
e08aa78a
AK		 3001 "mov %c[rax](%0), %%eax \n\t"
3002 "mov %c[rbx](%0), %%ebx \n\t"
3003 "mov %c[rdx](%0), %%edx \n\t"
3004 "mov %c[rsi](%0), %%esi \n\t"
3005 "mov %c[rdi](%0), %%edi \n\t"
3006 "mov %c[rbp](%0), %%ebp \n\t"
3007 "mov %c[rcx](%0), %%ecx \n\t" /* kills %0 (ecx) */
6aa8b732
AK		 3008#endif
3009 /* Enter guest mode */
cd2276a7 3010 "jne .Llaunched \n\t"
4ecac3fd 3011 __ex(ASM_VMX_VMLAUNCH) "\n\t"
cd2276a7 3012 "jmp .Lkvm_vmx_return \n\t"
4ecac3fd 3013 ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
cd2276a7 3014 ".Lkvm_vmx_return: "
6aa8b732 3015 /* Save guest registers, load host registers, keep flags */
05b3e0c2 3016#ifdef CONFIG_X86_64
e08aa78a
AK		 3017 "xchg %0, (%%rsp) \n\t"
3018 "mov %%rax, %c[rax](%0) \n\t"
3019 "mov %%rbx, %c[rbx](%0) \n\t"
3020 "pushq (%%rsp); popq %c[rcx](%0) \n\t"
3021 "mov %%rdx, %c[rdx](%0) \n\t"
3022 "mov %%rsi, %c[rsi](%0) \n\t"
3023 "mov %%rdi, %c[rdi](%0) \n\t"
3024 "mov %%rbp, %c[rbp](%0) \n\t"
3025 "mov %%r8, %c[r8](%0) \n\t"
3026 "mov %%r9, %c[r9](%0) \n\t"
3027 "mov %%r10, %c[r10](%0) \n\t"
3028 "mov %%r11, %c[r11](%0) \n\t"
3029 "mov %%r12, %c[r12](%0) \n\t"
3030 "mov %%r13, %c[r13](%0) \n\t"
3031 "mov %%r14, %c[r14](%0) \n\t"
3032 "mov %%r15, %c[r15](%0) \n\t"
6aa8b732 3033 "mov %%cr2, %%rax \n\t"
e08aa78a 3034 "mov %%rax, %c[cr2](%0) \n\t"
6aa8b732 3035
e08aa78a 3036 "pop %%rbp; pop %%rbp; pop %%rdx \n\t"
6aa8b732 3037#else
e08aa78a
AK		 3038 "xchg %0, (%%esp) \n\t"
3039 "mov %%eax, %c[rax](%0) \n\t"
3040 "mov %%ebx, %c[rbx](%0) \n\t"
3041 "pushl (%%esp); popl %c[rcx](%0) \n\t"
3042 "mov %%edx, %c[rdx](%0) \n\t"
3043 "mov %%esi, %c[rsi](%0) \n\t"
3044 "mov %%edi, %c[rdi](%0) \n\t"
3045 "mov %%ebp, %c[rbp](%0) \n\t"
6aa8b732 3046 "mov %%cr2, %%eax \n\t"
e08aa78a 3047 "mov %%eax, %c[cr2](%0) \n\t"
6aa8b732 3048
e08aa78a 3049 "pop %%ebp; pop %%ebp; pop %%edx \n\t"
6aa8b732 3050#endif
e08aa78a
AK		 3051 "setbe %c[fail](%0) \n\t"
3052 : : "c"(vmx), "d"((unsigned long)HOST_RSP),
3053 [launched]"i"(offsetof(struct vcpu_vmx, launched)),
3054 [fail]"i"(offsetof(struct vcpu_vmx, fail)),
ad312c7c
ZX		 3055 [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])),
3056 [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])),
3057 [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])),
3058 [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])),
3059 [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])),
3060 [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])),
3061 [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])),
05b3e0c2 3062#ifdef CONFIG_X86_64
ad312c7c
ZX		 3063 [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])),
3064 [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])),
3065 [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])),
3066 [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])),
3067 [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])),
3068 [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])),
3069 [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])),
3070 [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])),
6aa8b732 3071#endif
ad312c7c 3072 [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2))
c2036300
LV		 3073 : "cc", "memory"
3074#ifdef CONFIG_X86_64
3075 , "rbx", "rdi", "rsi"
3076 , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
ff593e5a
LV		 3077#else
3078 , "ebx", "edi", "rsi"
c2036300
LV		 3079#endif
3080 );
6aa8b732 3081
5fdbf976
MT		 3082 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP));
3083 vcpu->arch.regs_dirty = 0;
3084
1155f76a 3085 vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
9c8cba37
AK		 3086 if (vmx->rmode.irq.pending)
3087 fixup_rmode_irq(vmx);
1155f76a 3088
ad312c7c 3089 vcpu->arch.interrupt_window_open =
f08864b4
SY		 3090 (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
3091 (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)) == 0;
6aa8b732 3092
d77c26fc 3093 asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
15ad7146 3094 vmx->launched = 1;
1b6269db
AK		 3095
3096 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
3097
3098 /* We need to handle NMIs before interrupts are enabled */
f08864b4
SY		 3099 if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200 &&
3100 (intr_info & INTR_INFO_VALID_MASK)) {
2714d1d3 3101 KVMTRACE_0D(NMI, vcpu, handler);
1b6269db 3102 asm("int $2");
2714d1d3 3103 }
cf393f75
AK		 3104
3105 vmx_complete_interrupts(vmx);
6aa8b732
AK		 3106}
3107
6aa8b732
AK		 3108static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
3109{
a2fa3e9f
GH		 3110 struct vcpu_vmx *vmx = to_vmx(vcpu);
3111
3112 if (vmx->vmcs) {
543e4243 3113 vcpu_clear(vmx);
a2fa3e9f
GH		 3114 free_vmcs(vmx->vmcs);
3115 vmx->vmcs = NULL;
6aa8b732
AK		 3116 }
3117}
3118
3119static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
3120{
fb3f0f51
RR		 3121 struct vcpu_vmx *vmx = to_vmx(vcpu);
3122
2384d2b3
SY		 3123 spin_lock(&vmx_vpid_lock);
3124 if (vmx->vpid != 0)
3125 __clear_bit(vmx->vpid, vmx_vpid_bitmap);
3126 spin_unlock(&vmx_vpid_lock);
6aa8b732 3127 vmx_free_vmcs(vcpu);
fb3f0f51
RR		 3128 kfree(vmx->host_msrs);
3129 kfree(vmx->guest_msrs);
3130 kvm_vcpu_uninit(vcpu);
a4770347 3131 kmem_cache_free(kvm_vcpu_cache, vmx);
6aa8b732
AK		 3132}
3133
fb3f0f51 3134static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
6aa8b732 3135{
fb3f0f51 3136 int err;
c16f862d 3137 struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
15ad7146 3138 int cpu;
6aa8b732 3139
a2fa3e9f 3140 if (!vmx)
fb3f0f51
RR		 3141 return ERR_PTR(-ENOMEM);
3142
2384d2b3
SY		 3143 allocate_vpid(vmx);
3144
fb3f0f51
RR		 3145 err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
3146 if (err)
3147 goto free_vcpu;
965b58a5 3148
a2fa3e9f 3149 vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
fb3f0f51
RR		 3150 if (!vmx->guest_msrs) {
3151 err = -ENOMEM;
3152 goto uninit_vcpu;
3153 }
965b58a5 3154
a2fa3e9f
GH		 3155 vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
3156 if (!vmx->host_msrs)
fb3f0f51 3157 goto free_guest_msrs;
965b58a5 3158
a2fa3e9f
GH		 3159 vmx->vmcs = alloc_vmcs();
3160 if (!vmx->vmcs)
fb3f0f51 3161 goto free_msrs;
a2fa3e9f
GH		 3162
3163 vmcs_clear(vmx->vmcs);
3164
15ad7146
AK		 3165 cpu = get_cpu();
3166 vmx_vcpu_load(&vmx->vcpu, cpu);
8b9cf98c 3167 err = vmx_vcpu_setup(vmx);
fb3f0f51 3168 vmx_vcpu_put(&vmx->vcpu);
15ad7146 3169 put_cpu();
fb3f0f51
RR		 3170 if (err)
3171 goto free_vmcs;
5e4a0b3c
MT		 3172 if (vm_need_virtualize_apic_accesses(kvm))
3173 if (alloc_apic_access_page(kvm) != 0)
3174 goto free_vmcs;
fb3f0f51 3175
b7ebfb05
SY		 3176 if (vm_need_ept())
3177 if (alloc_identity_pagetable(kvm) != 0)
3178 goto free_vmcs;
3179
fb3f0f51
RR		 3180 return &vmx->vcpu;
3181
3182free_vmcs:
3183 free_vmcs(vmx->vmcs);
3184free_msrs:
3185 kfree(vmx->host_msrs);
3186free_guest_msrs:
3187 kfree(vmx->guest_msrs);
3188uninit_vcpu:
3189 kvm_vcpu_uninit(&vmx->vcpu);
3190free_vcpu:
a4770347 3191 kmem_cache_free(kvm_vcpu_cache, vmx);
fb3f0f51 3192 return ERR_PTR(err);
6aa8b732
AK		 3193}
3194
002c7f7c
YS		 3195static void __init vmx_check_processor_compat(void *rtn)
3196{
3197 struct vmcs_config vmcs_conf;
3198
3199 *(int *)rtn = 0;
3200 if (setup_vmcs_config(&vmcs_conf) < 0)
3201 *(int *)rtn = -EIO;
3202 if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
3203 printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
3204 smp_processor_id());
3205 *(int *)rtn = -EIO;
3206 }
3207}
3208
67253af5
SY		 3209static int get_ept_level(void)
3210{
3211 return VMX_EPT_DEFAULT_GAW + 1;
3212}
3213
cbdd1bea 3214static struct kvm_x86_ops vmx_x86_ops = {
6aa8b732
AK		 3215 .cpu_has_kvm_support = cpu_has_kvm_support,
3216 .disabled_by_bios = vmx_disabled_by_bios,
3217 .hardware_setup = hardware_setup,
3218 .hardware_unsetup = hardware_unsetup,
002c7f7c 3219 .check_processor_compatibility = vmx_check_processor_compat,
6aa8b732
AK		 3220 .hardware_enable = hardware_enable,
3221 .hardware_disable = hardware_disable,
774ead3a 3222 .cpu_has_accelerated_tpr = cpu_has_vmx_virtualize_apic_accesses,
6aa8b732
AK		 3223
3224 .vcpu_create = vmx_create_vcpu,
3225 .vcpu_free = vmx_free_vcpu,
04d2cc77 3226 .vcpu_reset = vmx_vcpu_reset,
6aa8b732 3227
04d2cc77 3228 .prepare_guest_switch = vmx_save_host_state,
6aa8b732
AK		 3229 .vcpu_load = vmx_vcpu_load,
3230 .vcpu_put = vmx_vcpu_put,
3231
3232 .set_guest_debug = set_guest_debug,
04d2cc77 3233 .guest_debug_pre = kvm_guest_debug_pre,
6aa8b732
AK		 3234 .get_msr = vmx_get_msr,
3235 .set_msr = vmx_set_msr,
3236 .get_segment_base = vmx_get_segment_base,
3237 .get_segment = vmx_get_segment,
3238 .set_segment = vmx_set_segment,
2e4d2653 3239 .get_cpl = vmx_get_cpl,
6aa8b732 3240 .get_cs_db_l_bits = vmx_get_cs_db_l_bits,
25c4c276 3241 .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
6aa8b732 3242 .set_cr0 = vmx_set_cr0,
6aa8b732
AK		 3243 .set_cr3 = vmx_set_cr3,
3244 .set_cr4 = vmx_set_cr4,
6aa8b732 3245 .set_efer = vmx_set_efer,
6aa8b732
AK		 3246 .get_idt = vmx_get_idt,
3247 .set_idt = vmx_set_idt,
3248 .get_gdt = vmx_get_gdt,
3249 .set_gdt = vmx_set_gdt,
5fdbf976 3250 .cache_reg = vmx_cache_reg,
6aa8b732
AK		 3251 .get_rflags = vmx_get_rflags,
3252 .set_rflags = vmx_set_rflags,
3253
3254 .tlb_flush = vmx_flush_tlb,
6aa8b732 3255
6aa8b732 3256 .run = vmx_vcpu_run,
04d2cc77 3257 .handle_exit = kvm_handle_exit,
6aa8b732 3258 .skip_emulated_instruction = skip_emulated_instruction,
102d8325 3259 .patch_hypercall = vmx_patch_hypercall,
2a8067f1
ED		 3260 .get_irq = vmx_get_irq,
3261 .set_irq = vmx_inject_irq,
298101da
AK		 3262 .queue_exception = vmx_queue_exception,
3263 .exception_injected = vmx_exception_injected,
04d2cc77
AK		 3264 .inject_pending_irq = vmx_intr_assist,
3265 .inject_pending_vectors = do_interrupt_requests,
cbc94022
IE		 3266
3267 .set_tss_addr = vmx_set_tss_addr,
67253af5 3268 .get_tdp_level = get_ept_level,
6aa8b732
AK		 3269};
3270
3271static int __init vmx_init(void)
3272{
25c5f225 3273 void *va;
fdef3ad1
HQ		 3274 int r;
3275
3276 vmx_io_bitmap_a = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
3277 if (!vmx_io_bitmap_a)
3278 return -ENOMEM;
3279
3280 vmx_io_bitmap_b = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
3281 if (!vmx_io_bitmap_b) {
3282 r = -ENOMEM;
3283 goto out;
3284 }
3285
25c5f225
SY		 3286 vmx_msr_bitmap = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
3287 if (!vmx_msr_bitmap) {
3288 r = -ENOMEM;
3289 goto out1;
3290 }
3291
fdef3ad1
HQ		 3292 /*
3293 * Allow direct access to the PC debug port (it is often used for I/O
3294 * delays, but the vmexits simply slow things down).
3295 */
25c5f225
SY		 3296 va = kmap(vmx_io_bitmap_a);
3297 memset(va, 0xff, PAGE_SIZE);
3298 clear_bit(0x80, va);
cd0536d7 3299 kunmap(vmx_io_bitmap_a);
fdef3ad1 3300
25c5f225
SY		 3301 va = kmap(vmx_io_bitmap_b);
3302 memset(va, 0xff, PAGE_SIZE);
cd0536d7 3303 kunmap(vmx_io_bitmap_b);
fdef3ad1 3304
25c5f225
SY		 3305 va = kmap(vmx_msr_bitmap);
3306 memset(va, 0xff, PAGE_SIZE);
3307 kunmap(vmx_msr_bitmap);
3308
2384d2b3
SY		 3309 set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
3310
cb498ea2 3311 r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE);
fdef3ad1 3312 if (r)
25c5f225
SY		 3313 goto out2;
3314
3315 vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_FS_BASE);
3316 vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_GS_BASE);
3317 vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_CS);
3318 vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_ESP);
3319 vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_EIP);
fdef3ad1 3320
5fdbcb9d 3321 if (vm_need_ept()) {
1439442c 3322 bypass_guest_pf = 0;
5fdbcb9d
SY		 3323 kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
3324 VMX_EPT_WRITABLE_MASK |
3325 VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
534e38b4 3326 kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
5fdbcb9d
SY		 3327 VMX_EPT_EXECUTABLE_MASK);
3328 kvm_enable_tdp();
3329 } else
3330 kvm_disable_tdp();
1439442c 3331
c7addb90
AK		 3332 if (bypass_guest_pf)
3333 kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);
3334
1439442c
SY		 3335 ept_sync_global();
3336
fdef3ad1
HQ		 3337 return 0;
3338
25c5f225
SY		 3339out2:
3340 __free_page(vmx_msr_bitmap);
fdef3ad1
HQ		 3341out1:
3342 __free_page(vmx_io_bitmap_b);
3343out:
3344 __free_page(vmx_io_bitmap_a);
3345 return r;
6aa8b732
AK		 3346}
3347
3348static void __exit vmx_exit(void)
3349{
25c5f225 3350 __free_page(vmx_msr_bitmap);
fdef3ad1
HQ		 3351 __free_page(vmx_io_bitmap_b);
3352 __free_page(vmx_io_bitmap_a);
3353
cb498ea2 3354 kvm_exit();
6aa8b732
AK		 3355}
3356
3357module_init(vmx_init)
3358module_exit(vmx_exit)
kernel source for telekom puls (alcatel/mediatek)