blob: df578782330908767dd997a2c9055b37e84e45dc [file] [log] [blame]
Avi Kivity6aa8b732006-12-10 02:21:36 -08001/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
8 *
9 * Authors:
10 * Avi Kivity <avi@qumranet.com>
11 * Yaniv Kamay <yaniv@qumranet.com>
12 *
13 * This work is licensed under the terms of the GNU GPL, version 2. See
14 * the COPYING file in the top-level directory.
15 *
16 */
17
18#include "kvm.h"
19#include "vmx.h"
Avi Kivitye4956062007-06-28 14:15:57 -040020#include "segment_descriptor.h"
21
Avi Kivity6aa8b732006-12-10 02:21:36 -080022#include <linux/module.h>
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +020023#include <linux/kernel.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080024#include <linux/mm.h>
25#include <linux/highmem.h>
Ingo Molnar07031e12007-01-10 23:15:38 -080026#include <linux/profile.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040027#include <linux/sched.h>
Avi Kivitye4956062007-06-28 14:15:57 -040028
Avi Kivity6aa8b732006-12-10 02:21:36 -080029#include <asm/io.h>
Anthony Liguori3b3be0d2006-12-13 00:33:43 -080030#include <asm/desc.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080031
Avi Kivity6aa8b732006-12-10 02:21:36 -080032MODULE_AUTHOR("Qumranet");
33MODULE_LICENSE("GPL");
34
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -040035struct vmcs {
36 u32 revision_id;
37 u32 abort;
38 char data[0];
39};
40
41struct vcpu_vmx {
Rusty Russellfb3f0f52007-07-27 17:16:56 +100042 struct kvm_vcpu vcpu;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -040043 int launched;
44 struct kvm_msr_entry *guest_msrs;
45 struct kvm_msr_entry *host_msrs;
46 int nmsrs;
47 int save_nmsrs;
48 int msr_offset_efer;
49#ifdef CONFIG_X86_64
50 int msr_offset_kernel_gs_base;
51#endif
52 struct vmcs *vmcs;
53 struct {
54 int loaded;
55 u16 fs_sel, gs_sel, ldt_sel;
56 int fs_gs_ldt_reload_needed;
57 }host_state;
58
59};
60
61static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
62{
Rusty Russellfb3f0f52007-07-27 17:16:56 +100063 return container_of(vcpu, struct vcpu_vmx, vcpu);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -040064}
65
Avi Kivity75880a02007-06-20 11:20:04 +030066static int init_rmode_tss(struct kvm *kvm);
67
Avi Kivity6aa8b732006-12-10 02:21:36 -080068static DEFINE_PER_CPU(struct vmcs *, vmxarea);
69static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
70
He, Qingfdef3ad2007-04-30 09:45:24 +030071static struct page *vmx_io_bitmap_a;
72static struct page *vmx_io_bitmap_b;
73
Avi Kivity05b3e0c2006-12-13 00:33:45 -080074#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -080075#define HOST_IS_64 1
76#else
77#define HOST_IS_64 0
78#endif
Eddie Dong2cc51562007-05-21 07:28:09 +030079#define EFER_SAVE_RESTORE_BITS ((u64)EFER_SCE)
Avi Kivity6aa8b732006-12-10 02:21:36 -080080
81static struct vmcs_descriptor {
82 int size;
83 int order;
84 u32 revision_id;
85} vmcs_descriptor;
86
87#define VMX_SEGMENT_FIELD(seg) \
88 [VCPU_SREG_##seg] = { \
89 .selector = GUEST_##seg##_SELECTOR, \
90 .base = GUEST_##seg##_BASE, \
91 .limit = GUEST_##seg##_LIMIT, \
92 .ar_bytes = GUEST_##seg##_AR_BYTES, \
93 }
94
95static struct kvm_vmx_segment_field {
96 unsigned selector;
97 unsigned base;
98 unsigned limit;
99 unsigned ar_bytes;
100} kvm_vmx_segment_fields[] = {
101 VMX_SEGMENT_FIELD(CS),
102 VMX_SEGMENT_FIELD(DS),
103 VMX_SEGMENT_FIELD(ES),
104 VMX_SEGMENT_FIELD(FS),
105 VMX_SEGMENT_FIELD(GS),
106 VMX_SEGMENT_FIELD(SS),
107 VMX_SEGMENT_FIELD(TR),
108 VMX_SEGMENT_FIELD(LDTR),
109};
110
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300111/*
112 * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it
113 * away by decrementing the array size.
114 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800115static const u32 vmx_msr_index[] = {
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800116#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800117 MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE,
118#endif
119 MSR_EFER, MSR_K6_STAR,
120};
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +0200121#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800122
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400123static void load_msrs(struct kvm_msr_entry *e, int n)
124{
125 int i;
126
127 for (i = 0; i < n; ++i)
128 wrmsrl(e[i].index, e[i].data);
129}
130
131static void save_msrs(struct kvm_msr_entry *e, int n)
132{
133 int i;
134
135 for (i = 0; i < n; ++i)
136 rdmsrl(e[i].index, e[i].data);
137}
138
139static inline u64 msr_efer_save_restore_bits(struct kvm_msr_entry msr)
Eddie Dong2cc51562007-05-21 07:28:09 +0300140{
141 return (u64)msr.data & EFER_SAVE_RESTORE_BITS;
142}
143
144static inline int msr_efer_need_save_restore(struct kvm_vcpu *vcpu)
145{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400146 struct vcpu_vmx *vmx = to_vmx(vcpu);
147 int efer_offset = vmx->msr_offset_efer;
148 return msr_efer_save_restore_bits(vmx->host_msrs[efer_offset]) !=
149 msr_efer_save_restore_bits(vmx->guest_msrs[efer_offset]);
Eddie Dong2cc51562007-05-21 07:28:09 +0300150}
151
Avi Kivity6aa8b732006-12-10 02:21:36 -0800152static inline int is_page_fault(u32 intr_info)
153{
154 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
155 INTR_INFO_VALID_MASK)) ==
156 (INTR_TYPE_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
157}
158
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300159static inline int is_no_device(u32 intr_info)
160{
161 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
162 INTR_INFO_VALID_MASK)) ==
163 (INTR_TYPE_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
164}
165
Avi Kivity6aa8b732006-12-10 02:21:36 -0800166static inline int is_external_interrupt(u32 intr_info)
167{
168 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
169 == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
170}
171
Eddie Donga75beee2007-05-17 18:55:15 +0300172static int __find_msr_index(struct kvm_vcpu *vcpu, u32 msr)
Avi Kivity7725f0b2006-12-13 00:34:01 -0800173{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400174 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity7725f0b2006-12-13 00:34:01 -0800175 int i;
176
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400177 for (i = 0; i < vmx->nmsrs; ++i)
178 if (vmx->guest_msrs[i].index == msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300179 return i;
180 return -1;
181}
182
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400183static struct kvm_msr_entry *find_msr_entry(struct kvm_vcpu *vcpu, u32 msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300184{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400185 struct vcpu_vmx *vmx = to_vmx(vcpu);
Eddie Donga75beee2007-05-17 18:55:15 +0300186 int i;
187
188 i = __find_msr_index(vcpu, msr);
189 if (i >= 0)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400190 return &vmx->guest_msrs[i];
Al Viro8b6d44c2007-02-09 16:38:40 +0000191 return NULL;
Avi Kivity7725f0b2006-12-13 00:34:01 -0800192}
193
Avi Kivity6aa8b732006-12-10 02:21:36 -0800194static void vmcs_clear(struct vmcs *vmcs)
195{
196 u64 phys_addr = __pa(vmcs);
197 u8 error;
198
199 asm volatile (ASM_VMX_VMCLEAR_RAX "; setna %0"
200 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
201 : "cc", "memory");
202 if (error)
203 printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
204 vmcs, phys_addr);
205}
206
207static void __vcpu_clear(void *arg)
208{
209 struct kvm_vcpu *vcpu = arg;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400210 struct vcpu_vmx *vmx = to_vmx(vcpu);
Ingo Molnard3b2c332007-01-05 16:36:23 -0800211 int cpu = raw_smp_processor_id();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800212
213 if (vcpu->cpu == cpu)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400214 vmcs_clear(vmx->vmcs);
215 if (per_cpu(current_vmcs, cpu) == vmx->vmcs)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800216 per_cpu(current_vmcs, cpu) = NULL;
Avi Kivity77002702007-06-13 19:55:28 +0300217 rdtscll(vcpu->host_tsc);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800218}
219
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800220static void vcpu_clear(struct kvm_vcpu *vcpu)
221{
222 if (vcpu->cpu != raw_smp_processor_id() && vcpu->cpu != -1)
223 smp_call_function_single(vcpu->cpu, __vcpu_clear, vcpu, 0, 1);
224 else
225 __vcpu_clear(vcpu);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400226 to_vmx(vcpu)->launched = 0;
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800227}
228
Avi Kivity6aa8b732006-12-10 02:21:36 -0800229static unsigned long vmcs_readl(unsigned long field)
230{
231 unsigned long value;
232
233 asm volatile (ASM_VMX_VMREAD_RDX_RAX
234 : "=a"(value) : "d"(field) : "cc");
235 return value;
236}
237
238static u16 vmcs_read16(unsigned long field)
239{
240 return vmcs_readl(field);
241}
242
243static u32 vmcs_read32(unsigned long field)
244{
245 return vmcs_readl(field);
246}
247
248static u64 vmcs_read64(unsigned long field)
249{
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800250#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800251 return vmcs_readl(field);
252#else
253 return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
254#endif
255}
256
Avi Kivitye52de1b2007-01-05 16:36:56 -0800257static noinline void vmwrite_error(unsigned long field, unsigned long value)
258{
259 printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
260 field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
261 dump_stack();
262}
263
Avi Kivity6aa8b732006-12-10 02:21:36 -0800264static void vmcs_writel(unsigned long field, unsigned long value)
265{
266 u8 error;
267
268 asm volatile (ASM_VMX_VMWRITE_RAX_RDX "; setna %0"
269 : "=q"(error) : "a"(value), "d"(field) : "cc" );
Avi Kivitye52de1b2007-01-05 16:36:56 -0800270 if (unlikely(error))
271 vmwrite_error(field, value);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800272}
273
274static void vmcs_write16(unsigned long field, u16 value)
275{
276 vmcs_writel(field, value);
277}
278
279static void vmcs_write32(unsigned long field, u32 value)
280{
281 vmcs_writel(field, value);
282}
283
284static void vmcs_write64(unsigned long field, u64 value)
285{
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800286#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800287 vmcs_writel(field, value);
288#else
289 vmcs_writel(field, value);
290 asm volatile ("");
291 vmcs_writel(field+1, value >> 32);
292#endif
293}
294
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300295static void vmcs_clear_bits(unsigned long field, u32 mask)
296{
297 vmcs_writel(field, vmcs_readl(field) & ~mask);
298}
299
300static void vmcs_set_bits(unsigned long field, u32 mask)
301{
302 vmcs_writel(field, vmcs_readl(field) | mask);
303}
304
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300305static void update_exception_bitmap(struct kvm_vcpu *vcpu)
306{
307 u32 eb;
308
309 eb = 1u << PF_VECTOR;
310 if (!vcpu->fpu_active)
311 eb |= 1u << NM_VECTOR;
312 if (vcpu->guest_debug.enabled)
313 eb |= 1u << 1;
314 if (vcpu->rmode.active)
315 eb = ~0;
316 vmcs_write32(EXCEPTION_BITMAP, eb);
317}
318
Avi Kivity33ed6322007-05-02 16:54:03 +0300319static void reload_tss(void)
320{
321#ifndef CONFIG_X86_64
322
323 /*
324 * VT restores TR but not its size. Useless.
325 */
326 struct descriptor_table gdt;
327 struct segment_descriptor *descs;
328
329 get_gdt(&gdt);
330 descs = (void *)gdt.base;
331 descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
332 load_TR_desc();
333#endif
334}
335
Eddie Dong2cc51562007-05-21 07:28:09 +0300336static void load_transition_efer(struct kvm_vcpu *vcpu)
337{
338 u64 trans_efer;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400339 struct vcpu_vmx *vmx = to_vmx(vcpu);
340 int efer_offset = vmx->msr_offset_efer;
Eddie Dong2cc51562007-05-21 07:28:09 +0300341
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400342 trans_efer = vmx->host_msrs[efer_offset].data;
Eddie Dong2cc51562007-05-21 07:28:09 +0300343 trans_efer &= ~EFER_SAVE_RESTORE_BITS;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400344 trans_efer |= msr_efer_save_restore_bits(vmx->guest_msrs[efer_offset]);
Eddie Dong2cc51562007-05-21 07:28:09 +0300345 wrmsrl(MSR_EFER, trans_efer);
346 vcpu->stat.efer_reload++;
347}
348
Avi Kivity33ed6322007-05-02 16:54:03 +0300349static void vmx_save_host_state(struct kvm_vcpu *vcpu)
350{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400351 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity33ed6322007-05-02 16:54:03 +0300352
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400353 if (vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300354 return;
355
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400356 vmx->host_state.loaded = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300357 /*
358 * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
359 * allow segment selectors with cpl > 0 or ti == 1.
360 */
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400361 vmx->host_state.ldt_sel = read_ldt();
362 vmx->host_state.fs_gs_ldt_reload_needed = vmx->host_state.ldt_sel;
363 vmx->host_state.fs_sel = read_fs();
364 if (!(vmx->host_state.fs_sel & 7))
365 vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300366 else {
367 vmcs_write16(HOST_FS_SELECTOR, 0);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400368 vmx->host_state.fs_gs_ldt_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300369 }
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400370 vmx->host_state.gs_sel = read_gs();
371 if (!(vmx->host_state.gs_sel & 7))
372 vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300373 else {
374 vmcs_write16(HOST_GS_SELECTOR, 0);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400375 vmx->host_state.fs_gs_ldt_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300376 }
377
378#ifdef CONFIG_X86_64
379 vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
380 vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
381#else
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400382 vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
383 vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
Avi Kivity33ed6322007-05-02 16:54:03 +0300384#endif
Avi Kivity707c0872007-05-02 17:33:43 +0300385
386#ifdef CONFIG_X86_64
387 if (is_long_mode(vcpu)) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400388 save_msrs(vmx->host_msrs +
389 vmx->msr_offset_kernel_gs_base, 1);
Avi Kivity707c0872007-05-02 17:33:43 +0300390 }
391#endif
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400392 load_msrs(vmx->guest_msrs, vmx->save_nmsrs);
Eddie Dong2cc51562007-05-21 07:28:09 +0300393 if (msr_efer_need_save_restore(vcpu))
394 load_transition_efer(vcpu);
Avi Kivity33ed6322007-05-02 16:54:03 +0300395}
396
397static void vmx_load_host_state(struct kvm_vcpu *vcpu)
398{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400399 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity33ed6322007-05-02 16:54:03 +0300400
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400401 if (!vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300402 return;
403
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400404 vmx->host_state.loaded = 0;
405 if (vmx->host_state.fs_gs_ldt_reload_needed) {
406 load_ldt(vmx->host_state.ldt_sel);
407 load_fs(vmx->host_state.fs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300408 /*
409 * If we have to reload gs, we must take care to
410 * preserve our gs base.
411 */
412 local_irq_disable();
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400413 load_gs(vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300414#ifdef CONFIG_X86_64
415 wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE));
416#endif
417 local_irq_enable();
418
419 reload_tss();
420 }
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400421 save_msrs(vmx->guest_msrs, vmx->save_nmsrs);
422 load_msrs(vmx->host_msrs, vmx->save_nmsrs);
Eddie Dong2cc51562007-05-21 07:28:09 +0300423 if (msr_efer_need_save_restore(vcpu))
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400424 load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1);
Avi Kivity33ed6322007-05-02 16:54:03 +0300425}
426
Avi Kivity6aa8b732006-12-10 02:21:36 -0800427/*
428 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
429 * vcpu mutex is already taken.
430 */
Avi Kivitybccf2152007-02-21 18:04:26 +0200431static void vmx_vcpu_load(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800432{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400433 struct vcpu_vmx *vmx = to_vmx(vcpu);
434 u64 phys_addr = __pa(vmx->vmcs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800435 int cpu;
Avi Kivity77002702007-06-13 19:55:28 +0300436 u64 tsc_this, delta;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800437
438 cpu = get_cpu();
439
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800440 if (vcpu->cpu != cpu)
441 vcpu_clear(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800442
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400443 if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800444 u8 error;
445
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400446 per_cpu(current_vmcs, cpu) = vmx->vmcs;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800447 asm volatile (ASM_VMX_VMPTRLD_RAX "; setna %0"
448 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
449 : "cc");
450 if (error)
451 printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400452 vmx->vmcs, phys_addr);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800453 }
454
455 if (vcpu->cpu != cpu) {
456 struct descriptor_table dt;
457 unsigned long sysenter_esp;
458
459 vcpu->cpu = cpu;
460 /*
461 * Linux uses per-cpu TSS and GDT, so set these when switching
462 * processors.
463 */
464 vmcs_writel(HOST_TR_BASE, read_tr_base()); /* 22.2.4 */
465 get_gdt(&dt);
466 vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */
467
468 rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
469 vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
Avi Kivity77002702007-06-13 19:55:28 +0300470
471 /*
472 * Make sure the time stamp counter is monotonous.
473 */
474 rdtscll(tsc_this);
475 delta = vcpu->host_tsc - tsc_this;
476 vmcs_write64(TSC_OFFSET, vmcs_read64(TSC_OFFSET) + delta);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800477 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800478}
479
480static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
481{
Avi Kivity33ed6322007-05-02 16:54:03 +0300482 vmx_load_host_state(vcpu);
Avi Kivity7702fd12007-06-14 16:27:40 +0300483 kvm_put_guest_fpu(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800484 put_cpu();
485}
486
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300487static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
488{
489 if (vcpu->fpu_active)
490 return;
491 vcpu->fpu_active = 1;
Rusty Russell707d92f2007-07-17 23:19:08 +1000492 vmcs_clear_bits(GUEST_CR0, X86_CR0_TS);
493 if (vcpu->cr0 & X86_CR0_TS)
494 vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300495 update_exception_bitmap(vcpu);
496}
497
498static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
499{
500 if (!vcpu->fpu_active)
501 return;
502 vcpu->fpu_active = 0;
Rusty Russell707d92f2007-07-17 23:19:08 +1000503 vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300504 update_exception_bitmap(vcpu);
505}
506
Avi Kivity774c47f2007-02-12 00:54:47 -0800507static void vmx_vcpu_decache(struct kvm_vcpu *vcpu)
508{
509 vcpu_clear(vcpu);
510}
511
Avi Kivity6aa8b732006-12-10 02:21:36 -0800512static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
513{
514 return vmcs_readl(GUEST_RFLAGS);
515}
516
517static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
518{
519 vmcs_writel(GUEST_RFLAGS, rflags);
520}
521
522static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
523{
524 unsigned long rip;
525 u32 interruptibility;
526
527 rip = vmcs_readl(GUEST_RIP);
528 rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
529 vmcs_writel(GUEST_RIP, rip);
530
531 /*
532 * We emulated an instruction, so temporary interrupt blocking
533 * should be removed, if set.
534 */
535 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
536 if (interruptibility & 3)
537 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
538 interruptibility & ~3);
Dor Laorc1150d82007-01-05 16:36:24 -0800539 vcpu->interrupt_window_open = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800540}
541
542static void vmx_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code)
543{
544 printk(KERN_DEBUG "inject_general_protection: rip 0x%lx\n",
545 vmcs_readl(GUEST_RIP));
546 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
547 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
548 GP_VECTOR |
549 INTR_TYPE_EXCEPTION |
550 INTR_INFO_DELIEVER_CODE_MASK |
551 INTR_INFO_VALID_MASK);
552}
553
554/*
Eddie Donga75beee2007-05-17 18:55:15 +0300555 * Swap MSR entry in host/guest MSR entry array.
556 */
557void move_msr_up(struct kvm_vcpu *vcpu, int from, int to)
558{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400559 struct vcpu_vmx *vmx = to_vmx(vcpu);
560 struct kvm_msr_entry tmp;
561
562 tmp = vmx->guest_msrs[to];
563 vmx->guest_msrs[to] = vmx->guest_msrs[from];
564 vmx->guest_msrs[from] = tmp;
565 tmp = vmx->host_msrs[to];
566 vmx->host_msrs[to] = vmx->host_msrs[from];
567 vmx->host_msrs[from] = tmp;
Eddie Donga75beee2007-05-17 18:55:15 +0300568}
569
570/*
Avi Kivitye38aea32007-04-19 13:22:48 +0300571 * Set up the vmcs to automatically save and restore system
572 * msrs. Don't touch the 64-bit msrs if the guest is in legacy
573 * mode, as fiddling with msrs is very expensive.
574 */
575static void setup_msrs(struct kvm_vcpu *vcpu)
576{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400577 struct vcpu_vmx *vmx = to_vmx(vcpu);
Eddie Dong2cc51562007-05-21 07:28:09 +0300578 int save_nmsrs;
Avi Kivitye38aea32007-04-19 13:22:48 +0300579
Eddie Donga75beee2007-05-17 18:55:15 +0300580 save_nmsrs = 0;
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300581#ifdef CONFIG_X86_64
Eddie Donga75beee2007-05-17 18:55:15 +0300582 if (is_long_mode(vcpu)) {
Eddie Dong2cc51562007-05-21 07:28:09 +0300583 int index;
584
Eddie Donga75beee2007-05-17 18:55:15 +0300585 index = __find_msr_index(vcpu, MSR_SYSCALL_MASK);
586 if (index >= 0)
587 move_msr_up(vcpu, index, save_nmsrs++);
588 index = __find_msr_index(vcpu, MSR_LSTAR);
589 if (index >= 0)
590 move_msr_up(vcpu, index, save_nmsrs++);
591 index = __find_msr_index(vcpu, MSR_CSTAR);
592 if (index >= 0)
593 move_msr_up(vcpu, index, save_nmsrs++);
594 index = __find_msr_index(vcpu, MSR_KERNEL_GS_BASE);
595 if (index >= 0)
596 move_msr_up(vcpu, index, save_nmsrs++);
597 /*
598 * MSR_K6_STAR is only needed on long mode guests, and only
599 * if efer.sce is enabled.
600 */
601 index = __find_msr_index(vcpu, MSR_K6_STAR);
602 if ((index >= 0) && (vcpu->shadow_efer & EFER_SCE))
603 move_msr_up(vcpu, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300604 }
Eddie Donga75beee2007-05-17 18:55:15 +0300605#endif
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400606 vmx->save_nmsrs = save_nmsrs;
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300607
Eddie Donga75beee2007-05-17 18:55:15 +0300608#ifdef CONFIG_X86_64
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400609 vmx->msr_offset_kernel_gs_base =
Eddie Donga75beee2007-05-17 18:55:15 +0300610 __find_msr_index(vcpu, MSR_KERNEL_GS_BASE);
611#endif
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400612 vmx->msr_offset_efer = __find_msr_index(vcpu, MSR_EFER);
Avi Kivitye38aea32007-04-19 13:22:48 +0300613}
614
615/*
Avi Kivity6aa8b732006-12-10 02:21:36 -0800616 * reads and returns guest's timestamp counter "register"
617 * guest_tsc = host_tsc + tsc_offset -- 21.3
618 */
619static u64 guest_read_tsc(void)
620{
621 u64 host_tsc, tsc_offset;
622
623 rdtscll(host_tsc);
624 tsc_offset = vmcs_read64(TSC_OFFSET);
625 return host_tsc + tsc_offset;
626}
627
628/*
629 * writes 'guest_tsc' into guest's timestamp counter "register"
630 * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc
631 */
632static void guest_write_tsc(u64 guest_tsc)
633{
634 u64 host_tsc;
635
636 rdtscll(host_tsc);
637 vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc);
638}
639
Avi Kivity6aa8b732006-12-10 02:21:36 -0800640/*
641 * Reads an msr value (of 'msr_index') into 'pdata'.
642 * Returns 0 on success, non-0 otherwise.
643 * Assumes vcpu_load() was already called.
644 */
645static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
646{
647 u64 data;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400648 struct kvm_msr_entry *msr;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800649
650 if (!pdata) {
651 printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
652 return -EINVAL;
653 }
654
655 switch (msr_index) {
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800656#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800657 case MSR_FS_BASE:
658 data = vmcs_readl(GUEST_FS_BASE);
659 break;
660 case MSR_GS_BASE:
661 data = vmcs_readl(GUEST_GS_BASE);
662 break;
663 case MSR_EFER:
Avi Kivity3bab1f52006-12-29 16:49:48 -0800664 return kvm_get_msr_common(vcpu, msr_index, pdata);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800665#endif
666 case MSR_IA32_TIME_STAMP_COUNTER:
667 data = guest_read_tsc();
668 break;
669 case MSR_IA32_SYSENTER_CS:
670 data = vmcs_read32(GUEST_SYSENTER_CS);
671 break;
672 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +0200673 data = vmcs_readl(GUEST_SYSENTER_EIP);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800674 break;
675 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +0200676 data = vmcs_readl(GUEST_SYSENTER_ESP);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800677 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800678 default:
679 msr = find_msr_entry(vcpu, msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -0800680 if (msr) {
681 data = msr->data;
682 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800683 }
Avi Kivity3bab1f52006-12-29 16:49:48 -0800684 return kvm_get_msr_common(vcpu, msr_index, pdata);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800685 }
686
687 *pdata = data;
688 return 0;
689}
690
691/*
692 * Writes msr value into into the appropriate "register".
693 * Returns 0 on success, non-0 otherwise.
694 * Assumes vcpu_load() was already called.
695 */
696static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
697{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400698 struct vcpu_vmx *vmx = to_vmx(vcpu);
699 struct kvm_msr_entry *msr;
Eddie Dong2cc51562007-05-21 07:28:09 +0300700 int ret = 0;
701
Avi Kivity6aa8b732006-12-10 02:21:36 -0800702 switch (msr_index) {
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800703#ifdef CONFIG_X86_64
Avi Kivity3bab1f52006-12-29 16:49:48 -0800704 case MSR_EFER:
Eddie Dong2cc51562007-05-21 07:28:09 +0300705 ret = kvm_set_msr_common(vcpu, msr_index, data);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400706 if (vmx->host_state.loaded)
Eddie Dong2cc51562007-05-21 07:28:09 +0300707 load_transition_efer(vcpu);
708 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800709 case MSR_FS_BASE:
710 vmcs_writel(GUEST_FS_BASE, data);
711 break;
712 case MSR_GS_BASE:
713 vmcs_writel(GUEST_GS_BASE, data);
714 break;
715#endif
716 case MSR_IA32_SYSENTER_CS:
717 vmcs_write32(GUEST_SYSENTER_CS, data);
718 break;
719 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +0200720 vmcs_writel(GUEST_SYSENTER_EIP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800721 break;
722 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +0200723 vmcs_writel(GUEST_SYSENTER_ESP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800724 break;
Avi Kivityd27d4ac2007-02-19 14:37:46 +0200725 case MSR_IA32_TIME_STAMP_COUNTER:
Avi Kivity6aa8b732006-12-10 02:21:36 -0800726 guest_write_tsc(data);
727 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800728 default:
729 msr = find_msr_entry(vcpu, msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -0800730 if (msr) {
731 msr->data = data;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400732 if (vmx->host_state.loaded)
733 load_msrs(vmx->guest_msrs, vmx->save_nmsrs);
Avi Kivity3bab1f52006-12-29 16:49:48 -0800734 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800735 }
Eddie Dong2cc51562007-05-21 07:28:09 +0300736 ret = kvm_set_msr_common(vcpu, msr_index, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800737 }
738
Eddie Dong2cc51562007-05-21 07:28:09 +0300739 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800740}
741
742/*
743 * Sync the rsp and rip registers into the vcpu structure. This allows
744 * registers to be accessed by indexing vcpu->regs.
745 */
746static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu)
747{
748 vcpu->regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
749 vcpu->rip = vmcs_readl(GUEST_RIP);
750}
751
752/*
753 * Syncs rsp and rip back into the vmcs. Should be called after possible
754 * modification.
755 */
756static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu)
757{
758 vmcs_writel(GUEST_RSP, vcpu->regs[VCPU_REGS_RSP]);
759 vmcs_writel(GUEST_RIP, vcpu->rip);
760}
761
762static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
763{
764 unsigned long dr7 = 0x400;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800765 int old_singlestep;
766
Avi Kivity6aa8b732006-12-10 02:21:36 -0800767 old_singlestep = vcpu->guest_debug.singlestep;
768
769 vcpu->guest_debug.enabled = dbg->enabled;
770 if (vcpu->guest_debug.enabled) {
771 int i;
772
773 dr7 |= 0x200; /* exact */
774 for (i = 0; i < 4; ++i) {
775 if (!dbg->breakpoints[i].enabled)
776 continue;
777 vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
778 dr7 |= 2 << (i*2); /* global enable */
779 dr7 |= 0 << (i*4+16); /* execution breakpoint */
780 }
781
Avi Kivity6aa8b732006-12-10 02:21:36 -0800782 vcpu->guest_debug.singlestep = dbg->singlestep;
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300783 } else
Avi Kivity6aa8b732006-12-10 02:21:36 -0800784 vcpu->guest_debug.singlestep = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800785
786 if (old_singlestep && !vcpu->guest_debug.singlestep) {
787 unsigned long flags;
788
789 flags = vmcs_readl(GUEST_RFLAGS);
790 flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
791 vmcs_writel(GUEST_RFLAGS, flags);
792 }
793
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300794 update_exception_bitmap(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800795 vmcs_writel(GUEST_DR7, dr7);
796
797 return 0;
798}
799
800static __init int cpu_has_kvm_support(void)
801{
802 unsigned long ecx = cpuid_ecx(1);
803 return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */
804}
805
806static __init int vmx_disabled_by_bios(void)
807{
808 u64 msr;
809
810 rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
Yang, Sheng62b3ffb2007-07-25 12:17:06 +0300811 return (msr & (MSR_IA32_FEATURE_CONTROL_LOCKED |
812 MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
813 == MSR_IA32_FEATURE_CONTROL_LOCKED;
814 /* locked but not enabled */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800815}
816
Avi Kivity774c47f2007-02-12 00:54:47 -0800817static void hardware_enable(void *garbage)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800818{
819 int cpu = raw_smp_processor_id();
820 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
821 u64 old;
822
823 rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
Yang, Sheng62b3ffb2007-07-25 12:17:06 +0300824 if ((old & (MSR_IA32_FEATURE_CONTROL_LOCKED |
825 MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
826 != (MSR_IA32_FEATURE_CONTROL_LOCKED |
827 MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800828 /* enable and lock */
Yang, Sheng62b3ffb2007-07-25 12:17:06 +0300829 wrmsrl(MSR_IA32_FEATURE_CONTROL, old |
830 MSR_IA32_FEATURE_CONTROL_LOCKED |
831 MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED);
Rusty Russell66aee912007-07-17 23:34:16 +1000832 write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800833 asm volatile (ASM_VMX_VMXON_RAX : : "a"(&phys_addr), "m"(phys_addr)
834 : "memory", "cc");
835}
836
837static void hardware_disable(void *garbage)
838{
839 asm volatile (ASM_VMX_VMXOFF : : : "cc");
840}
841
842static __init void setup_vmcs_descriptor(void)
843{
844 u32 vmx_msr_low, vmx_msr_high;
845
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -0800846 rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800847 vmcs_descriptor.size = vmx_msr_high & 0x1fff;
848 vmcs_descriptor.order = get_order(vmcs_descriptor.size);
849 vmcs_descriptor.revision_id = vmx_msr_low;
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -0800850}
Avi Kivity6aa8b732006-12-10 02:21:36 -0800851
852static struct vmcs *alloc_vmcs_cpu(int cpu)
853{
854 int node = cpu_to_node(cpu);
855 struct page *pages;
856 struct vmcs *vmcs;
857
858 pages = alloc_pages_node(node, GFP_KERNEL, vmcs_descriptor.order);
859 if (!pages)
860 return NULL;
861 vmcs = page_address(pages);
862 memset(vmcs, 0, vmcs_descriptor.size);
863 vmcs->revision_id = vmcs_descriptor.revision_id; /* vmcs revision id */
864 return vmcs;
865}
866
867static struct vmcs *alloc_vmcs(void)
868{
Ingo Molnard3b2c332007-01-05 16:36:23 -0800869 return alloc_vmcs_cpu(raw_smp_processor_id());
Avi Kivity6aa8b732006-12-10 02:21:36 -0800870}
871
872static void free_vmcs(struct vmcs *vmcs)
873{
874 free_pages((unsigned long)vmcs, vmcs_descriptor.order);
875}
876
Sam Ravnborg39959582007-06-01 00:47:13 -0700877static void free_kvm_area(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800878{
879 int cpu;
880
881 for_each_online_cpu(cpu)
882 free_vmcs(per_cpu(vmxarea, cpu));
883}
884
885extern struct vmcs *alloc_vmcs_cpu(int cpu);
886
887static __init int alloc_kvm_area(void)
888{
889 int cpu;
890
891 for_each_online_cpu(cpu) {
892 struct vmcs *vmcs;
893
894 vmcs = alloc_vmcs_cpu(cpu);
895 if (!vmcs) {
896 free_kvm_area();
897 return -ENOMEM;
898 }
899
900 per_cpu(vmxarea, cpu) = vmcs;
901 }
902 return 0;
903}
904
905static __init int hardware_setup(void)
906{
907 setup_vmcs_descriptor();
908 return alloc_kvm_area();
909}
910
911static __exit void hardware_unsetup(void)
912{
913 free_kvm_area();
914}
915
Avi Kivity6aa8b732006-12-10 02:21:36 -0800916static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save)
917{
918 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
919
Avi Kivity6af11b92007-03-19 13:18:10 +0200920 if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800921 vmcs_write16(sf->selector, save->selector);
922 vmcs_writel(sf->base, save->base);
923 vmcs_write32(sf->limit, save->limit);
924 vmcs_write32(sf->ar_bytes, save->ar);
925 } else {
926 u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK)
927 << AR_DPL_SHIFT;
928 vmcs_write32(sf->ar_bytes, 0x93 | dpl);
929 }
930}
931
932static void enter_pmode(struct kvm_vcpu *vcpu)
933{
934 unsigned long flags;
935
936 vcpu->rmode.active = 0;
937
938 vmcs_writel(GUEST_TR_BASE, vcpu->rmode.tr.base);
939 vmcs_write32(GUEST_TR_LIMIT, vcpu->rmode.tr.limit);
940 vmcs_write32(GUEST_TR_AR_BYTES, vcpu->rmode.tr.ar);
941
942 flags = vmcs_readl(GUEST_RFLAGS);
943 flags &= ~(IOPL_MASK | X86_EFLAGS_VM);
944 flags |= (vcpu->rmode.save_iopl << IOPL_SHIFT);
945 vmcs_writel(GUEST_RFLAGS, flags);
946
Rusty Russell66aee912007-07-17 23:34:16 +1000947 vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
948 (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800949
950 update_exception_bitmap(vcpu);
951
952 fix_pmode_dataseg(VCPU_SREG_ES, &vcpu->rmode.es);
953 fix_pmode_dataseg(VCPU_SREG_DS, &vcpu->rmode.ds);
954 fix_pmode_dataseg(VCPU_SREG_GS, &vcpu->rmode.gs);
955 fix_pmode_dataseg(VCPU_SREG_FS, &vcpu->rmode.fs);
956
957 vmcs_write16(GUEST_SS_SELECTOR, 0);
958 vmcs_write32(GUEST_SS_AR_BYTES, 0x93);
959
960 vmcs_write16(GUEST_CS_SELECTOR,
961 vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK);
962 vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
963}
964
965static int rmode_tss_base(struct kvm* kvm)
966{
967 gfn_t base_gfn = kvm->memslots[0].base_gfn + kvm->memslots[0].npages - 3;
968 return base_gfn << PAGE_SHIFT;
969}
970
971static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
972{
973 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
974
975 save->selector = vmcs_read16(sf->selector);
976 save->base = vmcs_readl(sf->base);
977 save->limit = vmcs_read32(sf->limit);
978 save->ar = vmcs_read32(sf->ar_bytes);
979 vmcs_write16(sf->selector, vmcs_readl(sf->base) >> 4);
980 vmcs_write32(sf->limit, 0xffff);
981 vmcs_write32(sf->ar_bytes, 0xf3);
982}
983
984static void enter_rmode(struct kvm_vcpu *vcpu)
985{
986 unsigned long flags;
987
988 vcpu->rmode.active = 1;
989
990 vcpu->rmode.tr.base = vmcs_readl(GUEST_TR_BASE);
991 vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));
992
993 vcpu->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT);
994 vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);
995
996 vcpu->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES);
997 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
998
999 flags = vmcs_readl(GUEST_RFLAGS);
1000 vcpu->rmode.save_iopl = (flags & IOPL_MASK) >> IOPL_SHIFT;
1001
1002 flags |= IOPL_MASK | X86_EFLAGS_VM;
1003
1004 vmcs_writel(GUEST_RFLAGS, flags);
Rusty Russell66aee912007-07-17 23:34:16 +10001005 vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001006 update_exception_bitmap(vcpu);
1007
1008 vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4);
1009 vmcs_write32(GUEST_SS_LIMIT, 0xffff);
1010 vmcs_write32(GUEST_SS_AR_BYTES, 0xf3);
1011
1012 vmcs_write32(GUEST_CS_AR_BYTES, 0xf3);
Michael Riepeabacf8d2006-12-22 01:05:45 -08001013 vmcs_write32(GUEST_CS_LIMIT, 0xffff);
Avi Kivity8cb5b032007-03-20 18:40:40 +02001014 if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000)
1015 vmcs_writel(GUEST_CS_BASE, 0xf0000);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001016 vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4);
1017
1018 fix_rmode_seg(VCPU_SREG_ES, &vcpu->rmode.es);
1019 fix_rmode_seg(VCPU_SREG_DS, &vcpu->rmode.ds);
1020 fix_rmode_seg(VCPU_SREG_GS, &vcpu->rmode.gs);
1021 fix_rmode_seg(VCPU_SREG_FS, &vcpu->rmode.fs);
Avi Kivity75880a02007-06-20 11:20:04 +03001022
1023 init_rmode_tss(vcpu->kvm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001024}
1025
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001026#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001027
1028static void enter_lmode(struct kvm_vcpu *vcpu)
1029{
1030 u32 guest_tr_ar;
1031
1032 guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES);
1033 if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) {
1034 printk(KERN_DEBUG "%s: tss fixup for long mode. \n",
1035 __FUNCTION__);
1036 vmcs_write32(GUEST_TR_AR_BYTES,
1037 (guest_tr_ar & ~AR_TYPE_MASK)
1038 | AR_TYPE_BUSY_64_TSS);
1039 }
1040
1041 vcpu->shadow_efer |= EFER_LMA;
1042
1043 find_msr_entry(vcpu, MSR_EFER)->data |= EFER_LMA | EFER_LME;
1044 vmcs_write32(VM_ENTRY_CONTROLS,
1045 vmcs_read32(VM_ENTRY_CONTROLS)
1046 | VM_ENTRY_CONTROLS_IA32E_MASK);
1047}
1048
1049static void exit_lmode(struct kvm_vcpu *vcpu)
1050{
1051 vcpu->shadow_efer &= ~EFER_LMA;
1052
1053 vmcs_write32(VM_ENTRY_CONTROLS,
1054 vmcs_read32(VM_ENTRY_CONTROLS)
1055 & ~VM_ENTRY_CONTROLS_IA32E_MASK);
1056}
1057
1058#endif
1059
Anthony Liguori25c4c272007-04-27 09:29:21 +03001060static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
Avi Kivity399badf2007-01-05 16:36:38 -08001061{
Avi Kivity399badf2007-01-05 16:36:38 -08001062 vcpu->cr4 &= KVM_GUEST_CR4_MASK;
1063 vcpu->cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK;
1064}
1065
Avi Kivity6aa8b732006-12-10 02:21:36 -08001066static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
1067{
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001068 vmx_fpu_deactivate(vcpu);
1069
Rusty Russell707d92f2007-07-17 23:19:08 +10001070 if (vcpu->rmode.active && (cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001071 enter_pmode(vcpu);
1072
Rusty Russell707d92f2007-07-17 23:19:08 +10001073 if (!vcpu->rmode.active && !(cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001074 enter_rmode(vcpu);
1075
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001076#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001077 if (vcpu->shadow_efer & EFER_LME) {
Rusty Russell707d92f2007-07-17 23:19:08 +10001078 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001079 enter_lmode(vcpu);
Rusty Russell707d92f2007-07-17 23:19:08 +10001080 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001081 exit_lmode(vcpu);
1082 }
1083#endif
1084
1085 vmcs_writel(CR0_READ_SHADOW, cr0);
1086 vmcs_writel(GUEST_CR0,
1087 (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON);
1088 vcpu->cr0 = cr0;
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001089
Rusty Russell707d92f2007-07-17 23:19:08 +10001090 if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE))
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001091 vmx_fpu_activate(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001092}
1093
Avi Kivity6aa8b732006-12-10 02:21:36 -08001094static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
1095{
1096 vmcs_writel(GUEST_CR3, cr3);
Rusty Russell707d92f2007-07-17 23:19:08 +10001097 if (vcpu->cr0 & X86_CR0_PE)
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001098 vmx_fpu_deactivate(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001099}
1100
1101static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
1102{
1103 vmcs_writel(CR4_READ_SHADOW, cr4);
1104 vmcs_writel(GUEST_CR4, cr4 | (vcpu->rmode.active ?
1105 KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON));
1106 vcpu->cr4 = cr4;
1107}
1108
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001109#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001110
1111static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
1112{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001113 struct kvm_msr_entry *msr = find_msr_entry(vcpu, MSR_EFER);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001114
1115 vcpu->shadow_efer = efer;
1116 if (efer & EFER_LMA) {
1117 vmcs_write32(VM_ENTRY_CONTROLS,
1118 vmcs_read32(VM_ENTRY_CONTROLS) |
1119 VM_ENTRY_CONTROLS_IA32E_MASK);
1120 msr->data = efer;
1121
1122 } else {
1123 vmcs_write32(VM_ENTRY_CONTROLS,
1124 vmcs_read32(VM_ENTRY_CONTROLS) &
1125 ~VM_ENTRY_CONTROLS_IA32E_MASK);
1126
1127 msr->data = efer & ~EFER_LME;
1128 }
Avi Kivitye38aea32007-04-19 13:22:48 +03001129 setup_msrs(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001130}
1131
1132#endif
1133
1134static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg)
1135{
1136 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1137
1138 return vmcs_readl(sf->base);
1139}
1140
1141static void vmx_get_segment(struct kvm_vcpu *vcpu,
1142 struct kvm_segment *var, int seg)
1143{
1144 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1145 u32 ar;
1146
1147 var->base = vmcs_readl(sf->base);
1148 var->limit = vmcs_read32(sf->limit);
1149 var->selector = vmcs_read16(sf->selector);
1150 ar = vmcs_read32(sf->ar_bytes);
1151 if (ar & AR_UNUSABLE_MASK)
1152 ar = 0;
1153 var->type = ar & 15;
1154 var->s = (ar >> 4) & 1;
1155 var->dpl = (ar >> 5) & 3;
1156 var->present = (ar >> 7) & 1;
1157 var->avl = (ar >> 12) & 1;
1158 var->l = (ar >> 13) & 1;
1159 var->db = (ar >> 14) & 1;
1160 var->g = (ar >> 15) & 1;
1161 var->unusable = (ar >> 16) & 1;
1162}
1163
Avi Kivity653e3102007-05-07 10:55:37 +03001164static u32 vmx_segment_access_rights(struct kvm_segment *var)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001165{
Avi Kivity6aa8b732006-12-10 02:21:36 -08001166 u32 ar;
1167
Avi Kivity653e3102007-05-07 10:55:37 +03001168 if (var->unusable)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001169 ar = 1 << 16;
1170 else {
1171 ar = var->type & 15;
1172 ar |= (var->s & 1) << 4;
1173 ar |= (var->dpl & 3) << 5;
1174 ar |= (var->present & 1) << 7;
1175 ar |= (var->avl & 1) << 12;
1176 ar |= (var->l & 1) << 13;
1177 ar |= (var->db & 1) << 14;
1178 ar |= (var->g & 1) << 15;
1179 }
Uri Lublinf7fbf1f2006-12-13 00:34:00 -08001180 if (ar == 0) /* a 0 value means unusable */
1181 ar = AR_UNUSABLE_MASK;
Avi Kivity653e3102007-05-07 10:55:37 +03001182
1183 return ar;
1184}
1185
1186static void vmx_set_segment(struct kvm_vcpu *vcpu,
1187 struct kvm_segment *var, int seg)
1188{
1189 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1190 u32 ar;
1191
1192 if (vcpu->rmode.active && seg == VCPU_SREG_TR) {
1193 vcpu->rmode.tr.selector = var->selector;
1194 vcpu->rmode.tr.base = var->base;
1195 vcpu->rmode.tr.limit = var->limit;
1196 vcpu->rmode.tr.ar = vmx_segment_access_rights(var);
1197 return;
1198 }
1199 vmcs_writel(sf->base, var->base);
1200 vmcs_write32(sf->limit, var->limit);
1201 vmcs_write16(sf->selector, var->selector);
1202 if (vcpu->rmode.active && var->s) {
1203 /*
1204 * Hack real-mode segments into vm86 compatibility.
1205 */
1206 if (var->base == 0xffff0000 && var->selector == 0xf000)
1207 vmcs_writel(sf->base, 0xf0000);
1208 ar = 0xf3;
1209 } else
1210 ar = vmx_segment_access_rights(var);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001211 vmcs_write32(sf->ar_bytes, ar);
1212}
1213
Avi Kivity6aa8b732006-12-10 02:21:36 -08001214static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
1215{
1216 u32 ar = vmcs_read32(GUEST_CS_AR_BYTES);
1217
1218 *db = (ar >> 14) & 1;
1219 *l = (ar >> 13) & 1;
1220}
1221
1222static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1223{
1224 dt->limit = vmcs_read32(GUEST_IDTR_LIMIT);
1225 dt->base = vmcs_readl(GUEST_IDTR_BASE);
1226}
1227
1228static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1229{
1230 vmcs_write32(GUEST_IDTR_LIMIT, dt->limit);
1231 vmcs_writel(GUEST_IDTR_BASE, dt->base);
1232}
1233
1234static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1235{
1236 dt->limit = vmcs_read32(GUEST_GDTR_LIMIT);
1237 dt->base = vmcs_readl(GUEST_GDTR_BASE);
1238}
1239
1240static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
1241{
1242 vmcs_write32(GUEST_GDTR_LIMIT, dt->limit);
1243 vmcs_writel(GUEST_GDTR_BASE, dt->base);
1244}
1245
1246static int init_rmode_tss(struct kvm* kvm)
1247{
1248 struct page *p1, *p2, *p3;
1249 gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
1250 char *page;
1251
Avi Kivity954bbbc22007-03-30 14:02:32 +03001252 p1 = gfn_to_page(kvm, fn++);
1253 p2 = gfn_to_page(kvm, fn++);
1254 p3 = gfn_to_page(kvm, fn);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001255
1256 if (!p1 || !p2 || !p3) {
1257 kvm_printf(kvm,"%s: gfn_to_page failed\n", __FUNCTION__);
1258 return 0;
1259 }
1260
1261 page = kmap_atomic(p1, KM_USER0);
Shani Moideena3870c42007-06-11 09:31:33 +05301262 clear_page(page);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001263 *(u16*)(page + 0x66) = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
1264 kunmap_atomic(page, KM_USER0);
1265
1266 page = kmap_atomic(p2, KM_USER0);
Shani Moideena3870c42007-06-11 09:31:33 +05301267 clear_page(page);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001268 kunmap_atomic(page, KM_USER0);
1269
1270 page = kmap_atomic(p3, KM_USER0);
Shani Moideena3870c42007-06-11 09:31:33 +05301271 clear_page(page);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001272 *(page + RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1) = ~0;
1273 kunmap_atomic(page, KM_USER0);
1274
1275 return 1;
1276}
1277
1278static void vmcs_write32_fixedbits(u32 msr, u32 vmcs_field, u32 val)
1279{
1280 u32 msr_high, msr_low;
1281
1282 rdmsr(msr, msr_low, msr_high);
1283
1284 val &= msr_high;
1285 val |= msr_low;
1286 vmcs_write32(vmcs_field, val);
1287}
1288
1289static void seg_setup(int seg)
1290{
1291 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1292
1293 vmcs_write16(sf->selector, 0);
1294 vmcs_writel(sf->base, 0);
1295 vmcs_write32(sf->limit, 0xffff);
1296 vmcs_write32(sf->ar_bytes, 0x93);
1297}
1298
1299/*
1300 * Sets up the vmcs for emulated real mode.
1301 */
1302static int vmx_vcpu_setup(struct kvm_vcpu *vcpu)
1303{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001304 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001305 u32 host_sysenter_cs;
1306 u32 junk;
1307 unsigned long a;
1308 struct descriptor_table dt;
1309 int i;
1310 int ret = 0;
Avi Kivitycd2276a2007-05-14 20:41:13 +03001311 unsigned long kvm_vmx_return;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001312
1313 if (!init_rmode_tss(vcpu->kvm)) {
1314 ret = -ENOMEM;
1315 goto out;
1316 }
1317
1318 memset(vcpu->regs, 0, sizeof(vcpu->regs));
1319 vcpu->regs[VCPU_REGS_RDX] = get_rdx_init_val();
1320 vcpu->cr8 = 0;
Avi Kivity94cea1b2007-06-13 19:43:19 +03001321 vcpu->apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
Qing Hedad37952007-07-12 12:33:56 +03001322 if (vcpu->vcpu_id == 0)
Avi Kivity94cea1b2007-06-13 19:43:19 +03001323 vcpu->apic_base |= MSR_IA32_APICBASE_BSP;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001324
1325 fx_init(vcpu);
1326
1327 /*
1328 * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
1329 * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh.
1330 */
1331 vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
1332 vmcs_writel(GUEST_CS_BASE, 0x000f0000);
1333 vmcs_write32(GUEST_CS_LIMIT, 0xffff);
1334 vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
1335
1336 seg_setup(VCPU_SREG_DS);
1337 seg_setup(VCPU_SREG_ES);
1338 seg_setup(VCPU_SREG_FS);
1339 seg_setup(VCPU_SREG_GS);
1340 seg_setup(VCPU_SREG_SS);
1341
1342 vmcs_write16(GUEST_TR_SELECTOR, 0);
1343 vmcs_writel(GUEST_TR_BASE, 0);
1344 vmcs_write32(GUEST_TR_LIMIT, 0xffff);
1345 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
1346
1347 vmcs_write16(GUEST_LDTR_SELECTOR, 0);
1348 vmcs_writel(GUEST_LDTR_BASE, 0);
1349 vmcs_write32(GUEST_LDTR_LIMIT, 0xffff);
1350 vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082);
1351
1352 vmcs_write32(GUEST_SYSENTER_CS, 0);
1353 vmcs_writel(GUEST_SYSENTER_ESP, 0);
1354 vmcs_writel(GUEST_SYSENTER_EIP, 0);
1355
1356 vmcs_writel(GUEST_RFLAGS, 0x02);
1357 vmcs_writel(GUEST_RIP, 0xfff0);
1358 vmcs_writel(GUEST_RSP, 0);
1359
Avi Kivity6aa8b732006-12-10 02:21:36 -08001360 //todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0
1361 vmcs_writel(GUEST_DR7, 0x400);
1362
1363 vmcs_writel(GUEST_GDTR_BASE, 0);
1364 vmcs_write32(GUEST_GDTR_LIMIT, 0xffff);
1365
1366 vmcs_writel(GUEST_IDTR_BASE, 0);
1367 vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
1368
1369 vmcs_write32(GUEST_ACTIVITY_STATE, 0);
1370 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
1371 vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
1372
1373 /* I/O */
He, Qingfdef3ad2007-04-30 09:45:24 +03001374 vmcs_write64(IO_BITMAP_A, page_to_phys(vmx_io_bitmap_a));
1375 vmcs_write64(IO_BITMAP_B, page_to_phys(vmx_io_bitmap_b));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001376
1377 guest_write_tsc(0);
1378
1379 vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */
1380
1381 /* Special registers */
1382 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
1383
1384 /* Control */
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001385 vmcs_write32_fixedbits(MSR_IA32_VMX_PINBASED_CTLS,
Avi Kivity6aa8b732006-12-10 02:21:36 -08001386 PIN_BASED_VM_EXEC_CONTROL,
1387 PIN_BASED_EXT_INTR_MASK /* 20.6.1 */
1388 | PIN_BASED_NMI_EXITING /* 20.6.1 */
1389 );
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001390 vmcs_write32_fixedbits(MSR_IA32_VMX_PROCBASED_CTLS,
Avi Kivity6aa8b732006-12-10 02:21:36 -08001391 CPU_BASED_VM_EXEC_CONTROL,
1392 CPU_BASED_HLT_EXITING /* 20.6.2 */
1393 | CPU_BASED_CR8_LOAD_EXITING /* 20.6.2 */
1394 | CPU_BASED_CR8_STORE_EXITING /* 20.6.2 */
Yang, Sheng62b3ffb2007-07-25 12:17:06 +03001395 | CPU_BASED_USE_IO_BITMAPS /* 20.6.2 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001396 | CPU_BASED_MOV_DR_EXITING
1397 | CPU_BASED_USE_TSC_OFFSETING /* 21.3 */
1398 );
1399
Avi Kivity6aa8b732006-12-10 02:21:36 -08001400 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, 0);
1401 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, 0);
1402 vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */
1403
1404 vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */
1405 vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */
1406 vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */
1407
1408 vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */
1409 vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
1410 vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */
1411 vmcs_write16(HOST_FS_SELECTOR, read_fs()); /* 22.2.4 */
1412 vmcs_write16(HOST_GS_SELECTOR, read_gs()); /* 22.2.4 */
1413 vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001414#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001415 rdmsrl(MSR_FS_BASE, a);
1416 vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */
1417 rdmsrl(MSR_GS_BASE, a);
1418 vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */
1419#else
1420 vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */
1421 vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */
1422#endif
1423
1424 vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */
1425
1426 get_idt(&dt);
1427 vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */
1428
Avi Kivitycd2276a2007-05-14 20:41:13 +03001429 asm ("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return));
1430 vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */
Eddie Dong2cc51562007-05-21 07:28:09 +03001431 vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
1432 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
1433 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001434
1435 rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk);
1436 vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs);
1437 rdmsrl(MSR_IA32_SYSENTER_ESP, a);
1438 vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */
1439 rdmsrl(MSR_IA32_SYSENTER_EIP, a);
1440 vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */
1441
Avi Kivity6aa8b732006-12-10 02:21:36 -08001442 for (i = 0; i < NR_VMX_MSR; ++i) {
1443 u32 index = vmx_msr_index[i];
1444 u32 data_low, data_high;
1445 u64 data;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001446 int j = vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001447
1448 if (rdmsr_safe(index, &data_low, &data_high) < 0)
1449 continue;
Avi Kivity432bd6c2007-01-31 23:48:13 -08001450 if (wrmsr_safe(index, data_low, data_high) < 0)
1451 continue;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001452 data = data_low | ((u64)data_high << 32);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001453 vmx->host_msrs[j].index = index;
1454 vmx->host_msrs[j].reserved = 0;
1455 vmx->host_msrs[j].data = data;
1456 vmx->guest_msrs[j] = vmx->host_msrs[j];
1457 ++vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001458 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001459
Avi Kivitye38aea32007-04-19 13:22:48 +03001460 setup_msrs(vcpu);
1461
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001462 vmcs_write32_fixedbits(MSR_IA32_VMX_EXIT_CTLS, VM_EXIT_CONTROLS,
Avi Kivity6aa8b732006-12-10 02:21:36 -08001463 (HOST_IS_64 << 9)); /* 22.2,1, 20.7.1 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001464
1465 /* 22.2.1, 20.8.1 */
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001466 vmcs_write32_fixedbits(MSR_IA32_VMX_ENTRY_CTLS,
Avi Kivity6aa8b732006-12-10 02:21:36 -08001467 VM_ENTRY_CONTROLS, 0);
1468 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */
1469
Michael Riepe3b99ab22006-12-13 00:34:15 -08001470#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001471 vmcs_writel(VIRTUAL_APIC_PAGE_ADDR, 0);
1472 vmcs_writel(TPR_THRESHOLD, 0);
Michael Riepe3b99ab22006-12-13 00:34:15 -08001473#endif
Avi Kivity6aa8b732006-12-10 02:21:36 -08001474
Anthony Liguori25c4c272007-04-27 09:29:21 +03001475 vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001476 vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK);
1477
1478 vcpu->cr0 = 0x60000010;
1479 vmx_set_cr0(vcpu, vcpu->cr0); // enter rmode
1480 vmx_set_cr4(vcpu, 0);
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001481#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001482 vmx_set_efer(vcpu, 0);
1483#endif
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001484 vmx_fpu_activate(vcpu);
Avi Kivityabd3f2d2007-05-02 17:57:40 +03001485 update_exception_bitmap(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001486
1487 return 0;
1488
Avi Kivity6aa8b732006-12-10 02:21:36 -08001489out:
1490 return ret;
1491}
1492
1493static void inject_rmode_irq(struct kvm_vcpu *vcpu, int irq)
1494{
1495 u16 ent[2];
1496 u16 cs;
1497 u16 ip;
1498 unsigned long flags;
1499 unsigned long ss_base = vmcs_readl(GUEST_SS_BASE);
1500 u16 sp = vmcs_readl(GUEST_RSP);
1501 u32 ss_limit = vmcs_read32(GUEST_SS_LIMIT);
1502
Eric Sesterhenn / Snakebyte39649942007-04-09 16:15:05 +02001503 if (sp > ss_limit || sp < 6 ) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001504 vcpu_printf(vcpu, "%s: #SS, rsp 0x%lx ss 0x%lx limit 0x%x\n",
1505 __FUNCTION__,
1506 vmcs_readl(GUEST_RSP),
1507 vmcs_readl(GUEST_SS_BASE),
1508 vmcs_read32(GUEST_SS_LIMIT));
1509 return;
1510 }
1511
1512 if (kvm_read_guest(vcpu, irq * sizeof(ent), sizeof(ent), &ent) !=
1513 sizeof(ent)) {
1514 vcpu_printf(vcpu, "%s: read guest err\n", __FUNCTION__);
1515 return;
1516 }
1517
1518 flags = vmcs_readl(GUEST_RFLAGS);
1519 cs = vmcs_readl(GUEST_CS_BASE) >> 4;
1520 ip = vmcs_readl(GUEST_RIP);
1521
1522
1523 if (kvm_write_guest(vcpu, ss_base + sp - 2, 2, &flags) != 2 ||
1524 kvm_write_guest(vcpu, ss_base + sp - 4, 2, &cs) != 2 ||
1525 kvm_write_guest(vcpu, ss_base + sp - 6, 2, &ip) != 2) {
1526 vcpu_printf(vcpu, "%s: write guest err\n", __FUNCTION__);
1527 return;
1528 }
1529
1530 vmcs_writel(GUEST_RFLAGS, flags &
1531 ~( X86_EFLAGS_IF | X86_EFLAGS_AC | X86_EFLAGS_TF));
1532 vmcs_write16(GUEST_CS_SELECTOR, ent[1]) ;
1533 vmcs_writel(GUEST_CS_BASE, ent[1] << 4);
1534 vmcs_writel(GUEST_RIP, ent[0]);
1535 vmcs_writel(GUEST_RSP, (vmcs_readl(GUEST_RSP) & ~0xffff) | (sp - 6));
1536}
1537
1538static void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
1539{
1540 int word_index = __ffs(vcpu->irq_summary);
1541 int bit_index = __ffs(vcpu->irq_pending[word_index]);
1542 int irq = word_index * BITS_PER_LONG + bit_index;
1543
1544 clear_bit(bit_index, &vcpu->irq_pending[word_index]);
1545 if (!vcpu->irq_pending[word_index])
1546 clear_bit(word_index, &vcpu->irq_summary);
1547
1548 if (vcpu->rmode.active) {
1549 inject_rmode_irq(vcpu, irq);
1550 return;
1551 }
1552 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
1553 irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
1554}
1555
Dor Laorc1150d82007-01-05 16:36:24 -08001556
1557static void do_interrupt_requests(struct kvm_vcpu *vcpu,
1558 struct kvm_run *kvm_run)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001559{
Dor Laorc1150d82007-01-05 16:36:24 -08001560 u32 cpu_based_vm_exec_control;
1561
1562 vcpu->interrupt_window_open =
1563 ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
1564 (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0);
1565
1566 if (vcpu->interrupt_window_open &&
1567 vcpu->irq_summary &&
1568 !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001569 /*
Dor Laorc1150d82007-01-05 16:36:24 -08001570 * If interrupts enabled, and not blocked by sti or mov ss. Good.
Avi Kivity6aa8b732006-12-10 02:21:36 -08001571 */
1572 kvm_do_inject_irq(vcpu);
Dor Laorc1150d82007-01-05 16:36:24 -08001573
1574 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
1575 if (!vcpu->interrupt_window_open &&
1576 (vcpu->irq_summary || kvm_run->request_interrupt_window))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001577 /*
1578 * Interrupts blocked. Wait for unblock.
1579 */
Dor Laorc1150d82007-01-05 16:36:24 -08001580 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
1581 else
1582 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
1583 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001584}
1585
1586static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu)
1587{
1588 struct kvm_guest_debug *dbg = &vcpu->guest_debug;
1589
1590 set_debugreg(dbg->bp[0], 0);
1591 set_debugreg(dbg->bp[1], 1);
1592 set_debugreg(dbg->bp[2], 2);
1593 set_debugreg(dbg->bp[3], 3);
1594
1595 if (dbg->singlestep) {
1596 unsigned long flags;
1597
1598 flags = vmcs_readl(GUEST_RFLAGS);
1599 flags |= X86_EFLAGS_TF | X86_EFLAGS_RF;
1600 vmcs_writel(GUEST_RFLAGS, flags);
1601 }
1602}
1603
1604static int handle_rmode_exception(struct kvm_vcpu *vcpu,
1605 int vec, u32 err_code)
1606{
1607 if (!vcpu->rmode.active)
1608 return 0;
1609
Nitin A Kambleb3f37702007-05-17 15:50:34 +03001610 /*
1611 * Instruction with address size override prefix opcode 0x67
1612 * Cause the #SS fault with 0 error code in VM86 mode.
1613 */
1614 if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001615 if (emulate_instruction(vcpu, NULL, 0, 0) == EMULATE_DONE)
1616 return 1;
1617 return 0;
1618}
1619
1620static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1621{
1622 u32 intr_info, error_code;
1623 unsigned long cr2, rip;
1624 u32 vect_info;
1625 enum emulation_result er;
Avi Kivitye2dec932007-01-05 16:36:54 -08001626 int r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001627
1628 vect_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
1629 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
1630
1631 if ((vect_info & VECTORING_INFO_VALID_MASK) &&
1632 !is_page_fault(intr_info)) {
1633 printk(KERN_ERR "%s: unexpected, vectoring info 0x%x "
1634 "intr info 0x%x\n", __FUNCTION__, vect_info, intr_info);
1635 }
1636
1637 if (is_external_interrupt(vect_info)) {
1638 int irq = vect_info & VECTORING_INFO_VECTOR_MASK;
1639 set_bit(irq, vcpu->irq_pending);
1640 set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary);
1641 }
1642
1643 if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) { /* nmi */
1644 asm ("int $2");
1645 return 1;
1646 }
Anthony Liguori2ab455c2007-04-27 09:29:49 +03001647
1648 if (is_no_device(intr_info)) {
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001649 vmx_fpu_activate(vcpu);
Anthony Liguori2ab455c2007-04-27 09:29:49 +03001650 return 1;
1651 }
1652
Avi Kivity6aa8b732006-12-10 02:21:36 -08001653 error_code = 0;
1654 rip = vmcs_readl(GUEST_RIP);
1655 if (intr_info & INTR_INFO_DELIEVER_CODE_MASK)
1656 error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
1657 if (is_page_fault(intr_info)) {
1658 cr2 = vmcs_readl(EXIT_QUALIFICATION);
1659
1660 spin_lock(&vcpu->kvm->lock);
Avi Kivitye2dec932007-01-05 16:36:54 -08001661 r = kvm_mmu_page_fault(vcpu, cr2, error_code);
1662 if (r < 0) {
1663 spin_unlock(&vcpu->kvm->lock);
1664 return r;
1665 }
1666 if (!r) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001667 spin_unlock(&vcpu->kvm->lock);
1668 return 1;
1669 }
1670
1671 er = emulate_instruction(vcpu, kvm_run, cr2, error_code);
1672 spin_unlock(&vcpu->kvm->lock);
1673
1674 switch (er) {
1675 case EMULATE_DONE:
1676 return 1;
1677 case EMULATE_DO_MMIO:
Avi Kivity1165f5f2007-04-19 17:27:43 +03001678 ++vcpu->stat.mmio_exits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001679 return 0;
1680 case EMULATE_FAIL:
1681 vcpu_printf(vcpu, "%s: emulate fail\n", __FUNCTION__);
1682 break;
1683 default:
1684 BUG();
1685 }
1686 }
1687
1688 if (vcpu->rmode.active &&
1689 handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
Avi Kivity72d6e5a2007-06-05 16:15:51 +03001690 error_code)) {
1691 if (vcpu->halt_request) {
1692 vcpu->halt_request = 0;
1693 return kvm_emulate_halt(vcpu);
1694 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001695 return 1;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03001696 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001697
1698 if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) == (INTR_TYPE_EXCEPTION | 1)) {
1699 kvm_run->exit_reason = KVM_EXIT_DEBUG;
1700 return 0;
1701 }
1702 kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
1703 kvm_run->ex.exception = intr_info & INTR_INFO_VECTOR_MASK;
1704 kvm_run->ex.error_code = error_code;
1705 return 0;
1706}
1707
1708static int handle_external_interrupt(struct kvm_vcpu *vcpu,
1709 struct kvm_run *kvm_run)
1710{
Avi Kivity1165f5f2007-04-19 17:27:43 +03001711 ++vcpu->stat.irq_exits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001712 return 1;
1713}
1714
Avi Kivity988ad742007-02-12 00:54:36 -08001715static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1716{
1717 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
1718 return 0;
1719}
Avi Kivity6aa8b732006-12-10 02:21:36 -08001720
Avi Kivity039576c2007-03-20 12:46:50 +02001721static int get_io_count(struct kvm_vcpu *vcpu, unsigned long *count)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001722{
1723 u64 inst;
1724 gva_t rip;
1725 int countr_size;
1726 int i, n;
1727
1728 if ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_VM)) {
1729 countr_size = 2;
1730 } else {
1731 u32 cs_ar = vmcs_read32(GUEST_CS_AR_BYTES);
1732
1733 countr_size = (cs_ar & AR_L_MASK) ? 8:
1734 (cs_ar & AR_DB_MASK) ? 4: 2;
1735 }
1736
1737 rip = vmcs_readl(GUEST_RIP);
1738 if (countr_size != 8)
1739 rip += vmcs_readl(GUEST_CS_BASE);
1740
1741 n = kvm_read_guest(vcpu, rip, sizeof(inst), &inst);
1742
1743 for (i = 0; i < n; i++) {
1744 switch (((u8*)&inst)[i]) {
1745 case 0xf0:
1746 case 0xf2:
1747 case 0xf3:
1748 case 0x2e:
1749 case 0x36:
1750 case 0x3e:
1751 case 0x26:
1752 case 0x64:
1753 case 0x65:
1754 case 0x66:
1755 break;
1756 case 0x67:
1757 countr_size = (countr_size == 2) ? 4: (countr_size >> 1);
1758 default:
1759 goto done;
1760 }
1761 }
1762 return 0;
1763done:
1764 countr_size *= 8;
1765 *count = vcpu->regs[VCPU_REGS_RCX] & (~0ULL >> (64 - countr_size));
Avi Kivity039576c2007-03-20 12:46:50 +02001766 //printk("cx: %lx\n", vcpu->regs[VCPU_REGS_RCX]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001767 return 1;
1768}
1769
1770static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1771{
1772 u64 exit_qualification;
Avi Kivity039576c2007-03-20 12:46:50 +02001773 int size, down, in, string, rep;
1774 unsigned port;
1775 unsigned long count;
1776 gva_t address;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001777
Avi Kivity1165f5f2007-04-19 17:27:43 +03001778 ++vcpu->stat.io_exits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001779 exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
Avi Kivity039576c2007-03-20 12:46:50 +02001780 in = (exit_qualification & 8) != 0;
1781 size = (exit_qualification & 7) + 1;
1782 string = (exit_qualification & 16) != 0;
1783 down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0;
1784 count = 1;
1785 rep = (exit_qualification & 32) != 0;
1786 port = exit_qualification >> 16;
1787 address = 0;
1788 if (string) {
1789 if (rep && !get_io_count(vcpu, &count))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001790 return 1;
Avi Kivity039576c2007-03-20 12:46:50 +02001791 address = vmcs_readl(GUEST_LINEAR_ADDRESS);
1792 }
1793 return kvm_setup_pio(vcpu, kvm_run, in, size, count, string, down,
1794 address, rep, port);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001795}
1796
Ingo Molnar102d8322007-02-19 14:37:47 +02001797static void
1798vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
1799{
1800 /*
1801 * Patch in the VMCALL instruction:
1802 */
1803 hypercall[0] = 0x0f;
1804 hypercall[1] = 0x01;
1805 hypercall[2] = 0xc1;
1806 hypercall[3] = 0xc3;
1807}
1808
Avi Kivity6aa8b732006-12-10 02:21:36 -08001809static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1810{
1811 u64 exit_qualification;
1812 int cr;
1813 int reg;
1814
1815 exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
1816 cr = exit_qualification & 15;
1817 reg = (exit_qualification >> 8) & 15;
1818 switch ((exit_qualification >> 4) & 3) {
1819 case 0: /* mov to cr */
1820 switch (cr) {
1821 case 0:
1822 vcpu_load_rsp_rip(vcpu);
1823 set_cr0(vcpu, vcpu->regs[reg]);
1824 skip_emulated_instruction(vcpu);
1825 return 1;
1826 case 3:
1827 vcpu_load_rsp_rip(vcpu);
1828 set_cr3(vcpu, vcpu->regs[reg]);
1829 skip_emulated_instruction(vcpu);
1830 return 1;
1831 case 4:
1832 vcpu_load_rsp_rip(vcpu);
1833 set_cr4(vcpu, vcpu->regs[reg]);
1834 skip_emulated_instruction(vcpu);
1835 return 1;
1836 case 8:
1837 vcpu_load_rsp_rip(vcpu);
1838 set_cr8(vcpu, vcpu->regs[reg]);
1839 skip_emulated_instruction(vcpu);
1840 return 1;
1841 };
1842 break;
Anthony Liguori25c4c272007-04-27 09:29:21 +03001843 case 2: /* clts */
1844 vcpu_load_rsp_rip(vcpu);
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001845 vmx_fpu_deactivate(vcpu);
Rusty Russell707d92f2007-07-17 23:19:08 +10001846 vcpu->cr0 &= ~X86_CR0_TS;
Anthony Liguori2ab455c2007-04-27 09:29:49 +03001847 vmcs_writel(CR0_READ_SHADOW, vcpu->cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001848 vmx_fpu_activate(vcpu);
Anthony Liguori25c4c272007-04-27 09:29:21 +03001849 skip_emulated_instruction(vcpu);
1850 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001851 case 1: /*mov from cr*/
1852 switch (cr) {
1853 case 3:
1854 vcpu_load_rsp_rip(vcpu);
1855 vcpu->regs[reg] = vcpu->cr3;
1856 vcpu_put_rsp_rip(vcpu);
1857 skip_emulated_instruction(vcpu);
1858 return 1;
1859 case 8:
Avi Kivity6aa8b732006-12-10 02:21:36 -08001860 vcpu_load_rsp_rip(vcpu);
1861 vcpu->regs[reg] = vcpu->cr8;
1862 vcpu_put_rsp_rip(vcpu);
1863 skip_emulated_instruction(vcpu);
1864 return 1;
1865 }
1866 break;
1867 case 3: /* lmsw */
1868 lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f);
1869
1870 skip_emulated_instruction(vcpu);
1871 return 1;
1872 default:
1873 break;
1874 }
1875 kvm_run->exit_reason = 0;
1876 printk(KERN_ERR "kvm: unhandled control register: op %d cr %d\n",
1877 (int)(exit_qualification >> 4) & 3, cr);
1878 return 0;
1879}
1880
1881static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1882{
1883 u64 exit_qualification;
1884 unsigned long val;
1885 int dr, reg;
1886
1887 /*
1888 * FIXME: this code assumes the host is debugging the guest.
1889 * need to deal with guest debugging itself too.
1890 */
1891 exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
1892 dr = exit_qualification & 7;
1893 reg = (exit_qualification >> 8) & 15;
1894 vcpu_load_rsp_rip(vcpu);
1895 if (exit_qualification & 16) {
1896 /* mov from dr */
1897 switch (dr) {
1898 case 6:
1899 val = 0xffff0ff0;
1900 break;
1901 case 7:
1902 val = 0x400;
1903 break;
1904 default:
1905 val = 0;
1906 }
1907 vcpu->regs[reg] = val;
1908 } else {
1909 /* mov to dr */
1910 }
1911 vcpu_put_rsp_rip(vcpu);
1912 skip_emulated_instruction(vcpu);
1913 return 1;
1914}
1915
1916static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1917{
Avi Kivity06465c52007-02-28 20:46:53 +02001918 kvm_emulate_cpuid(vcpu);
1919 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001920}
1921
1922static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1923{
1924 u32 ecx = vcpu->regs[VCPU_REGS_RCX];
1925 u64 data;
1926
1927 if (vmx_get_msr(vcpu, ecx, &data)) {
1928 vmx_inject_gp(vcpu, 0);
1929 return 1;
1930 }
1931
1932 /* FIXME: handling of bits 32:63 of rax, rdx */
1933 vcpu->regs[VCPU_REGS_RAX] = data & -1u;
1934 vcpu->regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
1935 skip_emulated_instruction(vcpu);
1936 return 1;
1937}
1938
1939static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1940{
1941 u32 ecx = vcpu->regs[VCPU_REGS_RCX];
1942 u64 data = (vcpu->regs[VCPU_REGS_RAX] & -1u)
1943 | ((u64)(vcpu->regs[VCPU_REGS_RDX] & -1u) << 32);
1944
1945 if (vmx_set_msr(vcpu, ecx, data) != 0) {
1946 vmx_inject_gp(vcpu, 0);
1947 return 1;
1948 }
1949
1950 skip_emulated_instruction(vcpu);
1951 return 1;
1952}
1953
Dor Laorc1150d82007-01-05 16:36:24 -08001954static void post_kvm_run_save(struct kvm_vcpu *vcpu,
1955 struct kvm_run *kvm_run)
1956{
1957 kvm_run->if_flag = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) != 0;
1958 kvm_run->cr8 = vcpu->cr8;
1959 kvm_run->apic_base = vcpu->apic_base;
1960 kvm_run->ready_for_interrupt_injection = (vcpu->interrupt_window_open &&
1961 vcpu->irq_summary == 0);
1962}
1963
Avi Kivity6aa8b732006-12-10 02:21:36 -08001964static int handle_interrupt_window(struct kvm_vcpu *vcpu,
1965 struct kvm_run *kvm_run)
1966{
Dor Laorc1150d82007-01-05 16:36:24 -08001967 /*
1968 * If the user space waits to inject interrupts, exit as soon as
1969 * possible
1970 */
1971 if (kvm_run->request_interrupt_window &&
Dor Laor022a9302007-01-05 16:37:00 -08001972 !vcpu->irq_summary) {
Dor Laorc1150d82007-01-05 16:36:24 -08001973 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
Avi Kivity1165f5f2007-04-19 17:27:43 +03001974 ++vcpu->stat.irq_window_exits;
Dor Laorc1150d82007-01-05 16:36:24 -08001975 return 0;
1976 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001977 return 1;
1978}
1979
1980static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1981{
1982 skip_emulated_instruction(vcpu);
Avi Kivityd3bef152007-06-05 15:53:05 +03001983 return kvm_emulate_halt(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001984}
1985
Ingo Molnarc21415e2007-02-19 14:37:47 +02001986static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1987{
Dor Laor510043d2007-02-19 18:25:43 +02001988 skip_emulated_instruction(vcpu);
Avi Kivity270fd9b2007-02-19 14:37:47 +02001989 return kvm_hypercall(vcpu, kvm_run);
Ingo Molnarc21415e2007-02-19 14:37:47 +02001990}
1991
Avi Kivity6aa8b732006-12-10 02:21:36 -08001992/*
1993 * The exit handlers return 1 if the exit was handled fully and guest execution
1994 * may resume. Otherwise they set the kvm_run parameter to indicate what needs
1995 * to be done to userspace and return 0.
1996 */
1997static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu,
1998 struct kvm_run *kvm_run) = {
1999 [EXIT_REASON_EXCEPTION_NMI] = handle_exception,
2000 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
Avi Kivity988ad742007-02-12 00:54:36 -08002001 [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002002 [EXIT_REASON_IO_INSTRUCTION] = handle_io,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002003 [EXIT_REASON_CR_ACCESS] = handle_cr,
2004 [EXIT_REASON_DR_ACCESS] = handle_dr,
2005 [EXIT_REASON_CPUID] = handle_cpuid,
2006 [EXIT_REASON_MSR_READ] = handle_rdmsr,
2007 [EXIT_REASON_MSR_WRITE] = handle_wrmsr,
2008 [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
2009 [EXIT_REASON_HLT] = handle_halt,
Ingo Molnarc21415e2007-02-19 14:37:47 +02002010 [EXIT_REASON_VMCALL] = handle_vmcall,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002011};
2012
2013static const int kvm_vmx_max_exit_handlers =
Robert P. J. Day50a34852007-06-03 13:35:29 -04002014 ARRAY_SIZE(kvm_vmx_exit_handlers);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002015
2016/*
2017 * The guest has exited. See if we can fix it or if we need userspace
2018 * assistance.
2019 */
2020static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
2021{
2022 u32 vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
2023 u32 exit_reason = vmcs_read32(VM_EXIT_REASON);
2024
2025 if ( (vectoring_info & VECTORING_INFO_VALID_MASK) &&
2026 exit_reason != EXIT_REASON_EXCEPTION_NMI )
2027 printk(KERN_WARNING "%s: unexpected, valid vectoring info and "
2028 "exit reason is 0x%x\n", __FUNCTION__, exit_reason);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002029 if (exit_reason < kvm_vmx_max_exit_handlers
2030 && kvm_vmx_exit_handlers[exit_reason])
2031 return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run);
2032 else {
2033 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
2034 kvm_run->hw.hardware_exit_reason = exit_reason;
2035 }
2036 return 0;
2037}
2038
Dor Laorc1150d82007-01-05 16:36:24 -08002039/*
2040 * Check if userspace requested an interrupt window, and that the
2041 * interrupt window is open.
2042 *
2043 * No need to exit to userspace if we already have an interrupt queued.
2044 */
2045static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
2046 struct kvm_run *kvm_run)
2047{
2048 return (!vcpu->irq_summary &&
2049 kvm_run->request_interrupt_window &&
2050 vcpu->interrupt_window_open &&
2051 (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF));
2052}
2053
Avi Kivityd9e368d2007-06-07 19:18:30 +03002054static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
2055{
Avi Kivityd9e368d2007-06-07 19:18:30 +03002056}
2057
Avi Kivity6aa8b732006-12-10 02:21:36 -08002058static int vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2059{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002060 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002061 u8 fail;
Avi Kivitye2dec932007-01-05 16:36:54 -08002062 int r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002063
Avi Kivitye6adf282007-04-30 16:07:54 +03002064preempted:
Avi Kivity6aa8b732006-12-10 02:21:36 -08002065 if (vcpu->guest_debug.enabled)
2066 kvm_guest_debug_pre(vcpu);
2067
Avi Kivitye6adf282007-04-30 16:07:54 +03002068again:
Shaohua Li9ae04482007-07-23 14:51:32 +08002069 r = kvm_mmu_reload(vcpu);
2070 if (unlikely(r))
2071 goto out;
2072
Gregory Haskinsff1dc792007-05-31 14:08:58 -04002073 if (!vcpu->mmio_read_completed)
2074 do_interrupt_requests(vcpu, kvm_run);
2075
Avi Kivity33ed6322007-05-02 16:54:03 +03002076 vmx_save_host_state(vcpu);
Avi Kivitye6adf282007-04-30 16:07:54 +03002077 kvm_load_guest_fpu(vcpu);
2078
2079 /*
2080 * Loading guest fpu may have cleared host cr0.ts
2081 */
2082 vmcs_writel(HOST_CR0, read_cr0());
2083
Avi Kivityd9e368d2007-06-07 19:18:30 +03002084 local_irq_disable();
2085
2086 vcpu->guest_mode = 1;
2087 if (vcpu->requests)
2088 if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests))
2089 vmx_flush_tlb(vcpu);
2090
Avi Kivity6aa8b732006-12-10 02:21:36 -08002091 asm (
2092 /* Store host registers */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002093#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08002094 "push %%rax; push %%rbx; push %%rdx;"
2095 "push %%rsi; push %%rdi; push %%rbp;"
2096 "push %%r8; push %%r9; push %%r10; push %%r11;"
2097 "push %%r12; push %%r13; push %%r14; push %%r15;"
2098 "push %%rcx \n\t"
2099 ASM_VMX_VMWRITE_RSP_RDX "\n\t"
2100#else
2101 "pusha; push %%ecx \n\t"
2102 ASM_VMX_VMWRITE_RSP_RDX "\n\t"
2103#endif
2104 /* Check if vmlaunch of vmresume is needed */
2105 "cmp $0, %1 \n\t"
2106 /* Load guest registers. Don't clobber flags. */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002107#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08002108 "mov %c[cr2](%3), %%rax \n\t"
2109 "mov %%rax, %%cr2 \n\t"
2110 "mov %c[rax](%3), %%rax \n\t"
2111 "mov %c[rbx](%3), %%rbx \n\t"
2112 "mov %c[rdx](%3), %%rdx \n\t"
2113 "mov %c[rsi](%3), %%rsi \n\t"
2114 "mov %c[rdi](%3), %%rdi \n\t"
2115 "mov %c[rbp](%3), %%rbp \n\t"
2116 "mov %c[r8](%3), %%r8 \n\t"
2117 "mov %c[r9](%3), %%r9 \n\t"
2118 "mov %c[r10](%3), %%r10 \n\t"
2119 "mov %c[r11](%3), %%r11 \n\t"
2120 "mov %c[r12](%3), %%r12 \n\t"
2121 "mov %c[r13](%3), %%r13 \n\t"
2122 "mov %c[r14](%3), %%r14 \n\t"
2123 "mov %c[r15](%3), %%r15 \n\t"
2124 "mov %c[rcx](%3), %%rcx \n\t" /* kills %3 (rcx) */
2125#else
2126 "mov %c[cr2](%3), %%eax \n\t"
2127 "mov %%eax, %%cr2 \n\t"
2128 "mov %c[rax](%3), %%eax \n\t"
2129 "mov %c[rbx](%3), %%ebx \n\t"
2130 "mov %c[rdx](%3), %%edx \n\t"
2131 "mov %c[rsi](%3), %%esi \n\t"
2132 "mov %c[rdi](%3), %%edi \n\t"
2133 "mov %c[rbp](%3), %%ebp \n\t"
2134 "mov %c[rcx](%3), %%ecx \n\t" /* kills %3 (ecx) */
2135#endif
2136 /* Enter guest mode */
Avi Kivitycd2276a2007-05-14 20:41:13 +03002137 "jne .Llaunched \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002138 ASM_VMX_VMLAUNCH "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03002139 "jmp .Lkvm_vmx_return \n\t"
2140 ".Llaunched: " ASM_VMX_VMRESUME "\n\t"
2141 ".Lkvm_vmx_return: "
Avi Kivity6aa8b732006-12-10 02:21:36 -08002142 /* Save guest registers, load host registers, keep flags */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002143#ifdef CONFIG_X86_64
Ingo Molnar96958232007-02-12 00:54:33 -08002144 "xchg %3, (%%rsp) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002145 "mov %%rax, %c[rax](%3) \n\t"
2146 "mov %%rbx, %c[rbx](%3) \n\t"
Ingo Molnar96958232007-02-12 00:54:33 -08002147 "pushq (%%rsp); popq %c[rcx](%3) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002148 "mov %%rdx, %c[rdx](%3) \n\t"
2149 "mov %%rsi, %c[rsi](%3) \n\t"
2150 "mov %%rdi, %c[rdi](%3) \n\t"
2151 "mov %%rbp, %c[rbp](%3) \n\t"
2152 "mov %%r8, %c[r8](%3) \n\t"
2153 "mov %%r9, %c[r9](%3) \n\t"
2154 "mov %%r10, %c[r10](%3) \n\t"
2155 "mov %%r11, %c[r11](%3) \n\t"
2156 "mov %%r12, %c[r12](%3) \n\t"
2157 "mov %%r13, %c[r13](%3) \n\t"
2158 "mov %%r14, %c[r14](%3) \n\t"
2159 "mov %%r15, %c[r15](%3) \n\t"
2160 "mov %%cr2, %%rax \n\t"
2161 "mov %%rax, %c[cr2](%3) \n\t"
Ingo Molnar96958232007-02-12 00:54:33 -08002162 "mov (%%rsp), %3 \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002163
2164 "pop %%rcx; pop %%r15; pop %%r14; pop %%r13; pop %%r12;"
2165 "pop %%r11; pop %%r10; pop %%r9; pop %%r8;"
2166 "pop %%rbp; pop %%rdi; pop %%rsi;"
2167 "pop %%rdx; pop %%rbx; pop %%rax \n\t"
2168#else
Ingo Molnar96958232007-02-12 00:54:33 -08002169 "xchg %3, (%%esp) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002170 "mov %%eax, %c[rax](%3) \n\t"
2171 "mov %%ebx, %c[rbx](%3) \n\t"
Ingo Molnar96958232007-02-12 00:54:33 -08002172 "pushl (%%esp); popl %c[rcx](%3) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002173 "mov %%edx, %c[rdx](%3) \n\t"
2174 "mov %%esi, %c[rsi](%3) \n\t"
2175 "mov %%edi, %c[rdi](%3) \n\t"
2176 "mov %%ebp, %c[rbp](%3) \n\t"
2177 "mov %%cr2, %%eax \n\t"
2178 "mov %%eax, %c[cr2](%3) \n\t"
Ingo Molnar96958232007-02-12 00:54:33 -08002179 "mov (%%esp), %3 \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08002180
2181 "pop %%ecx; popa \n\t"
2182#endif
2183 "setbe %0 \n\t"
Herbert Xue0015482007-01-23 14:10:00 +11002184 : "=q" (fail)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002185 : "r"(vmx->launched), "d"((unsigned long)HOST_RSP),
Avi Kivity6aa8b732006-12-10 02:21:36 -08002186 "c"(vcpu),
2187 [rax]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RAX])),
2188 [rbx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBX])),
2189 [rcx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RCX])),
2190 [rdx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDX])),
2191 [rsi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RSI])),
2192 [rdi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDI])),
2193 [rbp]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBP])),
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002194#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08002195 [r8 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R8 ])),
2196 [r9 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R9 ])),
2197 [r10]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R10])),
2198 [r11]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R11])),
2199 [r12]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R12])),
2200 [r13]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R13])),
2201 [r14]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R14])),
2202 [r15]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R15])),
2203#endif
2204 [cr2]"i"(offsetof(struct kvm_vcpu, cr2))
2205 : "cc", "memory" );
2206
Avi Kivityd9e368d2007-06-07 19:18:30 +03002207 vcpu->guest_mode = 0;
2208 local_irq_enable();
2209
Avi Kivity1165f5f2007-04-19 17:27:43 +03002210 ++vcpu->stat.exits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002211
Dor Laorc1150d82007-01-05 16:36:24 -08002212 vcpu->interrupt_window_open = (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002213
Avi Kivity6aa8b732006-12-10 02:21:36 -08002214 asm ("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002215
Avi Kivity05e0c8c2007-04-30 16:15:58 +03002216 if (unlikely(fail)) {
Avi Kivity8eb7d332007-03-04 14:17:08 +02002217 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
2218 kvm_run->fail_entry.hardware_entry_failure_reason
2219 = vmcs_read32(VM_INSTRUCTION_ERROR);
Avi Kivitye2dec932007-01-05 16:36:54 -08002220 r = 0;
Avi Kivity05e0c8c2007-04-30 16:15:58 +03002221 goto out;
2222 }
2223 /*
2224 * Profile KVM exit RIPs:
2225 */
2226 if (unlikely(prof_on == KVM_PROFILING))
2227 profile_hit(KVM_PROFILING, (void *)vmcs_readl(GUEST_RIP));
Jeremy Fitzhardinge464d1a72007-02-13 13:26:20 +01002228
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002229 vmx->launched = 1;
Avi Kivity05e0c8c2007-04-30 16:15:58 +03002230 r = kvm_handle_exit(kvm_run, vcpu);
2231 if (r > 0) {
2232 /* Give scheduler a change to reschedule. */
2233 if (signal_pending(current)) {
2234 r = -EINTR;
2235 kvm_run->exit_reason = KVM_EXIT_INTR;
2236 ++vcpu->stat.signal_exits;
2237 goto out;
2238 }
Dor Laorc1150d82007-01-05 16:36:24 -08002239
Avi Kivity05e0c8c2007-04-30 16:15:58 +03002240 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
2241 r = -EINTR;
2242 kvm_run->exit_reason = KVM_EXIT_INTR;
2243 ++vcpu->stat.request_irq_exits;
2244 goto out;
2245 }
2246 if (!need_resched()) {
2247 ++vcpu->stat.light_exits;
2248 goto again;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002249 }
2250 }
Dor Laorc1150d82007-01-05 16:36:24 -08002251
Avi Kivitye6adf282007-04-30 16:07:54 +03002252out:
Avi Kivitye6adf282007-04-30 16:07:54 +03002253 if (r > 0) {
2254 kvm_resched(vcpu);
2255 goto preempted;
2256 }
2257
Dor Laorc1150d82007-01-05 16:36:24 -08002258 post_kvm_run_save(vcpu, kvm_run);
Avi Kivitye2dec932007-01-05 16:36:54 -08002259 return r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002260}
2261
Avi Kivity6aa8b732006-12-10 02:21:36 -08002262static void vmx_inject_page_fault(struct kvm_vcpu *vcpu,
2263 unsigned long addr,
2264 u32 err_code)
2265{
2266 u32 vect_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
2267
Avi Kivity1165f5f2007-04-19 17:27:43 +03002268 ++vcpu->stat.pf_guest;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002269
2270 if (is_page_fault(vect_info)) {
2271 printk(KERN_DEBUG "inject_page_fault: "
2272 "double fault 0x%lx @ 0x%lx\n",
2273 addr, vmcs_readl(GUEST_RIP));
2274 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, 0);
2275 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2276 DF_VECTOR |
2277 INTR_TYPE_EXCEPTION |
2278 INTR_INFO_DELIEVER_CODE_MASK |
2279 INTR_INFO_VALID_MASK);
2280 return;
2281 }
2282 vcpu->cr2 = addr;
2283 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, err_code);
2284 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2285 PF_VECTOR |
2286 INTR_TYPE_EXCEPTION |
2287 INTR_INFO_DELIEVER_CODE_MASK |
2288 INTR_INFO_VALID_MASK);
2289
2290}
2291
2292static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
2293{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002294 struct vcpu_vmx *vmx = to_vmx(vcpu);
2295
2296 if (vmx->vmcs) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08002297 on_each_cpu(__vcpu_clear, vcpu, 0, 1);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002298 free_vmcs(vmx->vmcs);
2299 vmx->vmcs = NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002300 }
2301}
2302
2303static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
2304{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002305 struct vcpu_vmx *vmx = to_vmx(vcpu);
2306
Avi Kivity6aa8b732006-12-10 02:21:36 -08002307 vmx_free_vmcs(vcpu);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002308 kfree(vmx->host_msrs);
2309 kfree(vmx->guest_msrs);
2310 kvm_vcpu_uninit(vcpu);
2311 kfree(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002312}
2313
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002314static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002315{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002316 int err;
2317 struct vcpu_vmx *vmx = kzalloc(sizeof(*vmx), GFP_KERNEL);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002318
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002319 if (!vmx)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002320 return ERR_PTR(-ENOMEM);
2321
2322 err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
2323 if (err)
2324 goto free_vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08002325
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002326 vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002327 if (!vmx->guest_msrs) {
2328 err = -ENOMEM;
2329 goto uninit_vcpu;
2330 }
Ingo Molnar965b58a2007-01-05 16:36:23 -08002331
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002332 vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
2333 if (!vmx->host_msrs)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002334 goto free_guest_msrs;
Ingo Molnar965b58a2007-01-05 16:36:23 -08002335
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002336 vmx->vmcs = alloc_vmcs();
2337 if (!vmx->vmcs)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002338 goto free_msrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002339
2340 vmcs_clear(vmx->vmcs);
2341
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002342 vmx_vcpu_load(&vmx->vcpu);
2343 err = vmx_vcpu_setup(&vmx->vcpu);
2344 vmx_vcpu_put(&vmx->vcpu);
2345 if (err)
2346 goto free_vmcs;
Ingo Molnar965b58a2007-01-05 16:36:23 -08002347
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002348 return &vmx->vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08002349
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002350free_vmcs:
2351 free_vmcs(vmx->vmcs);
2352free_msrs:
2353 kfree(vmx->host_msrs);
2354free_guest_msrs:
2355 kfree(vmx->guest_msrs);
2356uninit_vcpu:
2357 kvm_vcpu_uninit(&vmx->vcpu);
2358free_vcpu:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002359 kfree(vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10002360 return ERR_PTR(err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002361}
2362
2363static struct kvm_arch_ops vmx_arch_ops = {
2364 .cpu_has_kvm_support = cpu_has_kvm_support,
2365 .disabled_by_bios = vmx_disabled_by_bios,
2366 .hardware_setup = hardware_setup,
2367 .hardware_unsetup = hardware_unsetup,
2368 .hardware_enable = hardware_enable,
2369 .hardware_disable = hardware_disable,
2370
2371 .vcpu_create = vmx_create_vcpu,
2372 .vcpu_free = vmx_free_vcpu,
2373
2374 .vcpu_load = vmx_vcpu_load,
2375 .vcpu_put = vmx_vcpu_put,
Avi Kivity774c47f2007-02-12 00:54:47 -08002376 .vcpu_decache = vmx_vcpu_decache,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002377
2378 .set_guest_debug = set_guest_debug,
2379 .get_msr = vmx_get_msr,
2380 .set_msr = vmx_set_msr,
2381 .get_segment_base = vmx_get_segment_base,
2382 .get_segment = vmx_get_segment,
2383 .set_segment = vmx_set_segment,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002384 .get_cs_db_l_bits = vmx_get_cs_db_l_bits,
Anthony Liguori25c4c272007-04-27 09:29:21 +03002385 .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002386 .set_cr0 = vmx_set_cr0,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002387 .set_cr3 = vmx_set_cr3,
2388 .set_cr4 = vmx_set_cr4,
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002389#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08002390 .set_efer = vmx_set_efer,
2391#endif
2392 .get_idt = vmx_get_idt,
2393 .set_idt = vmx_set_idt,
2394 .get_gdt = vmx_get_gdt,
2395 .set_gdt = vmx_set_gdt,
2396 .cache_regs = vcpu_load_rsp_rip,
2397 .decache_regs = vcpu_put_rsp_rip,
2398 .get_rflags = vmx_get_rflags,
2399 .set_rflags = vmx_set_rflags,
2400
2401 .tlb_flush = vmx_flush_tlb,
2402 .inject_page_fault = vmx_inject_page_fault,
2403
2404 .inject_gp = vmx_inject_gp,
2405
2406 .run = vmx_vcpu_run,
2407 .skip_emulated_instruction = skip_emulated_instruction,
Ingo Molnar102d8322007-02-19 14:37:47 +02002408 .patch_hypercall = vmx_patch_hypercall,
Avi Kivity6aa8b732006-12-10 02:21:36 -08002409};
2410
2411static int __init vmx_init(void)
2412{
He, Qingfdef3ad2007-04-30 09:45:24 +03002413 void *iova;
2414 int r;
2415
2416 vmx_io_bitmap_a = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
2417 if (!vmx_io_bitmap_a)
2418 return -ENOMEM;
2419
2420 vmx_io_bitmap_b = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
2421 if (!vmx_io_bitmap_b) {
2422 r = -ENOMEM;
2423 goto out;
2424 }
2425
2426 /*
2427 * Allow direct access to the PC debug port (it is often used for I/O
2428 * delays, but the vmexits simply slow things down).
2429 */
2430 iova = kmap(vmx_io_bitmap_a);
2431 memset(iova, 0xff, PAGE_SIZE);
2432 clear_bit(0x80, iova);
Avi Kivitycd0536d2007-05-08 11:34:07 +03002433 kunmap(vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03002434
2435 iova = kmap(vmx_io_bitmap_b);
2436 memset(iova, 0xff, PAGE_SIZE);
Avi Kivitycd0536d2007-05-08 11:34:07 +03002437 kunmap(vmx_io_bitmap_b);
He, Qingfdef3ad2007-04-30 09:45:24 +03002438
2439 r = kvm_init_arch(&vmx_arch_ops, THIS_MODULE);
2440 if (r)
2441 goto out1;
2442
2443 return 0;
2444
2445out1:
2446 __free_page(vmx_io_bitmap_b);
2447out:
2448 __free_page(vmx_io_bitmap_a);
2449 return r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002450}
2451
2452static void __exit vmx_exit(void)
2453{
He, Qingfdef3ad2007-04-30 09:45:24 +03002454 __free_page(vmx_io_bitmap_b);
2455 __free_page(vmx_io_bitmap_a);
2456
Avi Kivity6aa8b732006-12-10 02:21:36 -08002457 kvm_exit_arch();
2458}
2459
2460module_init(vmx_init)
2461module_exit(vmx_exit)