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Commit | Line | Data |
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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> |
e495606d | 29 | |
6aa8b732 | 30 | #include <asm/io.h> |
3b3be0d1 | 31 | #include <asm/desc.h> |
6aa8b732 | 32 | |
4ecac3fd AK |
33 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
34 | ||
6aa8b732 AK |
35 | MODULE_AUTHOR("Qumranet"); |
36 | MODULE_LICENSE("GPL"); | |
37 | ||
c7addb90 AK |
38 | static int bypass_guest_pf = 1; |
39 | module_param(bypass_guest_pf, bool, 0); | |
40 | ||
2384d2b3 SY |
41 | static int enable_vpid = 1; |
42 | module_param(enable_vpid, bool, 0); | |
43 | ||
4c9fc8ef AK |
44 | static int flexpriority_enabled = 1; |
45 | module_param(flexpriority_enabled, bool, 0); | |
46 | ||
1439442c | 47 | static int enable_ept = 1; |
d56f546d SY |
48 | module_param(enable_ept, bool, 0); |
49 | ||
a2fa3e9f GH |
50 | struct vmcs { |
51 | u32 revision_id; | |
52 | u32 abort; | |
53 | char data[0]; | |
54 | }; | |
55 | ||
56 | struct vcpu_vmx { | |
fb3f0f51 | 57 | struct kvm_vcpu vcpu; |
a2fa3e9f | 58 | int launched; |
29bd8a78 | 59 | u8 fail; |
1155f76a | 60 | u32 idt_vectoring_info; |
a2fa3e9f GH |
61 | struct kvm_msr_entry *guest_msrs; |
62 | struct kvm_msr_entry *host_msrs; | |
63 | int nmsrs; | |
64 | int save_nmsrs; | |
65 | int msr_offset_efer; | |
66 | #ifdef CONFIG_X86_64 | |
67 | int msr_offset_kernel_gs_base; | |
68 | #endif | |
69 | struct vmcs *vmcs; | |
70 | struct { | |
71 | int loaded; | |
72 | u16 fs_sel, gs_sel, ldt_sel; | |
152d3f2f LV |
73 | int gs_ldt_reload_needed; |
74 | int fs_reload_needed; | |
51c6cf66 | 75 | int guest_efer_loaded; |
d77c26fc | 76 | } host_state; |
9c8cba37 AK |
77 | struct { |
78 | struct { | |
79 | bool pending; | |
80 | u8 vector; | |
81 | unsigned rip; | |
82 | } irq; | |
83 | } rmode; | |
2384d2b3 | 84 | int vpid; |
a2fa3e9f GH |
85 | }; |
86 | ||
87 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) | |
88 | { | |
fb3f0f51 | 89 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
a2fa3e9f GH |
90 | } |
91 | ||
b7ebfb05 | 92 | static int init_rmode(struct kvm *kvm); |
75880a01 | 93 | |
6aa8b732 AK |
94 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
95 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); | |
96 | ||
fdef3ad1 HQ |
97 | static struct page *vmx_io_bitmap_a; |
98 | static struct page *vmx_io_bitmap_b; | |
25c5f225 | 99 | static struct page *vmx_msr_bitmap; |
fdef3ad1 | 100 | |
2384d2b3 SY |
101 | static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS); |
102 | static DEFINE_SPINLOCK(vmx_vpid_lock); | |
103 | ||
1c3d14fe | 104 | static struct vmcs_config { |
6aa8b732 AK |
105 | int size; |
106 | int order; | |
107 | u32 revision_id; | |
1c3d14fe YS |
108 | u32 pin_based_exec_ctrl; |
109 | u32 cpu_based_exec_ctrl; | |
f78e0e2e | 110 | u32 cpu_based_2nd_exec_ctrl; |
1c3d14fe YS |
111 | u32 vmexit_ctrl; |
112 | u32 vmentry_ctrl; | |
113 | } vmcs_config; | |
6aa8b732 | 114 | |
d56f546d SY |
115 | struct vmx_capability { |
116 | u32 ept; | |
117 | u32 vpid; | |
118 | } vmx_capability; | |
119 | ||
6aa8b732 AK |
120 | #define VMX_SEGMENT_FIELD(seg) \ |
121 | [VCPU_SREG_##seg] = { \ | |
122 | .selector = GUEST_##seg##_SELECTOR, \ | |
123 | .base = GUEST_##seg##_BASE, \ | |
124 | .limit = GUEST_##seg##_LIMIT, \ | |
125 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ | |
126 | } | |
127 | ||
128 | static struct kvm_vmx_segment_field { | |
129 | unsigned selector; | |
130 | unsigned base; | |
131 | unsigned limit; | |
132 | unsigned ar_bytes; | |
133 | } kvm_vmx_segment_fields[] = { | |
134 | VMX_SEGMENT_FIELD(CS), | |
135 | VMX_SEGMENT_FIELD(DS), | |
136 | VMX_SEGMENT_FIELD(ES), | |
137 | VMX_SEGMENT_FIELD(FS), | |
138 | VMX_SEGMENT_FIELD(GS), | |
139 | VMX_SEGMENT_FIELD(SS), | |
140 | VMX_SEGMENT_FIELD(TR), | |
141 | VMX_SEGMENT_FIELD(LDTR), | |
142 | }; | |
143 | ||
4d56c8a7 AK |
144 | /* |
145 | * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it | |
146 | * away by decrementing the array size. | |
147 | */ | |
6aa8b732 | 148 | static const u32 vmx_msr_index[] = { |
05b3e0c2 | 149 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
150 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE, |
151 | #endif | |
152 | MSR_EFER, MSR_K6_STAR, | |
153 | }; | |
9d8f549d | 154 | #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) |
6aa8b732 | 155 | |
a2fa3e9f GH |
156 | static void load_msrs(struct kvm_msr_entry *e, int n) |
157 | { | |
158 | int i; | |
159 | ||
160 | for (i = 0; i < n; ++i) | |
161 | wrmsrl(e[i].index, e[i].data); | |
162 | } | |
163 | ||
164 | static void save_msrs(struct kvm_msr_entry *e, int n) | |
165 | { | |
166 | int i; | |
167 | ||
168 | for (i = 0; i < n; ++i) | |
169 | rdmsrl(e[i].index, e[i].data); | |
170 | } | |
171 | ||
6aa8b732 AK |
172 | static inline int is_page_fault(u32 intr_info) |
173 | { | |
174 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
175 | INTR_INFO_VALID_MASK)) == | |
176 | (INTR_TYPE_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); | |
177 | } | |
178 | ||
2ab455cc AL |
179 | static inline int is_no_device(u32 intr_info) |
180 | { | |
181 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
182 | INTR_INFO_VALID_MASK)) == | |
183 | (INTR_TYPE_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); | |
184 | } | |
185 | ||
7aa81cc0 AL |
186 | static inline int is_invalid_opcode(u32 intr_info) |
187 | { | |
188 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
189 | INTR_INFO_VALID_MASK)) == | |
190 | (INTR_TYPE_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); | |
191 | } | |
192 | ||
6aa8b732 AK |
193 | static inline int is_external_interrupt(u32 intr_info) |
194 | { | |
195 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
196 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); | |
197 | } | |
198 | ||
25c5f225 SY |
199 | static inline int cpu_has_vmx_msr_bitmap(void) |
200 | { | |
201 | return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS); | |
202 | } | |
203 | ||
6e5d865c YS |
204 | static inline int cpu_has_vmx_tpr_shadow(void) |
205 | { | |
206 | return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW); | |
207 | } | |
208 | ||
209 | static inline int vm_need_tpr_shadow(struct kvm *kvm) | |
210 | { | |
211 | return ((cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm))); | |
212 | } | |
213 | ||
f78e0e2e SY |
214 | static inline int cpu_has_secondary_exec_ctrls(void) |
215 | { | |
216 | return (vmcs_config.cpu_based_exec_ctrl & | |
217 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS); | |
218 | } | |
219 | ||
774ead3a | 220 | static inline bool cpu_has_vmx_virtualize_apic_accesses(void) |
f78e0e2e | 221 | { |
4c9fc8ef AK |
222 | return flexpriority_enabled |
223 | && (vmcs_config.cpu_based_2nd_exec_ctrl & | |
224 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES); | |
f78e0e2e SY |
225 | } |
226 | ||
d56f546d SY |
227 | static inline int cpu_has_vmx_invept_individual_addr(void) |
228 | { | |
229 | return (!!(vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT)); | |
230 | } | |
231 | ||
232 | static inline int cpu_has_vmx_invept_context(void) | |
233 | { | |
234 | return (!!(vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT)); | |
235 | } | |
236 | ||
237 | static inline int cpu_has_vmx_invept_global(void) | |
238 | { | |
239 | return (!!(vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT)); | |
240 | } | |
241 | ||
242 | static inline int cpu_has_vmx_ept(void) | |
243 | { | |
244 | return (vmcs_config.cpu_based_2nd_exec_ctrl & | |
245 | SECONDARY_EXEC_ENABLE_EPT); | |
246 | } | |
247 | ||
248 | static inline int vm_need_ept(void) | |
249 | { | |
250 | return (cpu_has_vmx_ept() && enable_ept); | |
251 | } | |
252 | ||
f78e0e2e SY |
253 | static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm) |
254 | { | |
255 | return ((cpu_has_vmx_virtualize_apic_accesses()) && | |
256 | (irqchip_in_kernel(kvm))); | |
257 | } | |
258 | ||
2384d2b3 SY |
259 | static inline int cpu_has_vmx_vpid(void) |
260 | { | |
261 | return (vmcs_config.cpu_based_2nd_exec_ctrl & | |
262 | SECONDARY_EXEC_ENABLE_VPID); | |
263 | } | |
264 | ||
8b9cf98c | 265 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
7725f0ba AK |
266 | { |
267 | int i; | |
268 | ||
a2fa3e9f GH |
269 | for (i = 0; i < vmx->nmsrs; ++i) |
270 | if (vmx->guest_msrs[i].index == msr) | |
a75beee6 ED |
271 | return i; |
272 | return -1; | |
273 | } | |
274 | ||
2384d2b3 SY |
275 | static inline void __invvpid(int ext, u16 vpid, gva_t gva) |
276 | { | |
277 | struct { | |
278 | u64 vpid : 16; | |
279 | u64 rsvd : 48; | |
280 | u64 gva; | |
281 | } operand = { vpid, 0, gva }; | |
282 | ||
4ecac3fd | 283 | asm volatile (__ex(ASM_VMX_INVVPID) |
2384d2b3 SY |
284 | /* CF==1 or ZF==1 --> rc = -1 */ |
285 | "; ja 1f ; ud2 ; 1:" | |
286 | : : "a"(&operand), "c"(ext) : "cc", "memory"); | |
287 | } | |
288 | ||
1439442c SY |
289 | static inline void __invept(int ext, u64 eptp, gpa_t gpa) |
290 | { | |
291 | struct { | |
292 | u64 eptp, gpa; | |
293 | } operand = {eptp, gpa}; | |
294 | ||
4ecac3fd | 295 | asm volatile (__ex(ASM_VMX_INVEPT) |
1439442c SY |
296 | /* CF==1 or ZF==1 --> rc = -1 */ |
297 | "; ja 1f ; ud2 ; 1:\n" | |
298 | : : "a" (&operand), "c" (ext) : "cc", "memory"); | |
299 | } | |
300 | ||
8b9cf98c | 301 | static struct kvm_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr) |
a75beee6 ED |
302 | { |
303 | int i; | |
304 | ||
8b9cf98c | 305 | i = __find_msr_index(vmx, msr); |
a75beee6 | 306 | if (i >= 0) |
a2fa3e9f | 307 | return &vmx->guest_msrs[i]; |
8b6d44c7 | 308 | return NULL; |
7725f0ba AK |
309 | } |
310 | ||
6aa8b732 AK |
311 | static void vmcs_clear(struct vmcs *vmcs) |
312 | { | |
313 | u64 phys_addr = __pa(vmcs); | |
314 | u8 error; | |
315 | ||
4ecac3fd | 316 | asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0" |
6aa8b732 AK |
317 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
318 | : "cc", "memory"); | |
319 | if (error) | |
320 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", | |
321 | vmcs, phys_addr); | |
322 | } | |
323 | ||
324 | static void __vcpu_clear(void *arg) | |
325 | { | |
8b9cf98c | 326 | struct vcpu_vmx *vmx = arg; |
d3b2c338 | 327 | int cpu = raw_smp_processor_id(); |
6aa8b732 | 328 | |
8b9cf98c | 329 | if (vmx->vcpu.cpu == cpu) |
a2fa3e9f GH |
330 | vmcs_clear(vmx->vmcs); |
331 | if (per_cpu(current_vmcs, cpu) == vmx->vmcs) | |
6aa8b732 | 332 | per_cpu(current_vmcs, cpu) = NULL; |
ad312c7c | 333 | rdtscll(vmx->vcpu.arch.host_tsc); |
6aa8b732 AK |
334 | } |
335 | ||
8b9cf98c | 336 | static void vcpu_clear(struct vcpu_vmx *vmx) |
8d0be2b3 | 337 | { |
eae5ecb5 AK |
338 | if (vmx->vcpu.cpu == -1) |
339 | return; | |
8691e5a8 | 340 | smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1); |
8b9cf98c | 341 | vmx->launched = 0; |
8d0be2b3 AK |
342 | } |
343 | ||
2384d2b3 SY |
344 | static inline void vpid_sync_vcpu_all(struct vcpu_vmx *vmx) |
345 | { | |
346 | if (vmx->vpid == 0) | |
347 | return; | |
348 | ||
349 | __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0); | |
350 | } | |
351 | ||
1439442c SY |
352 | static inline void ept_sync_global(void) |
353 | { | |
354 | if (cpu_has_vmx_invept_global()) | |
355 | __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0); | |
356 | } | |
357 | ||
358 | static inline void ept_sync_context(u64 eptp) | |
359 | { | |
360 | if (vm_need_ept()) { | |
361 | if (cpu_has_vmx_invept_context()) | |
362 | __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0); | |
363 | else | |
364 | ept_sync_global(); | |
365 | } | |
366 | } | |
367 | ||
368 | static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa) | |
369 | { | |
370 | if (vm_need_ept()) { | |
371 | if (cpu_has_vmx_invept_individual_addr()) | |
372 | __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR, | |
373 | eptp, gpa); | |
374 | else | |
375 | ept_sync_context(eptp); | |
376 | } | |
377 | } | |
378 | ||
6aa8b732 AK |
379 | static unsigned long vmcs_readl(unsigned long field) |
380 | { | |
381 | unsigned long value; | |
382 | ||
4ecac3fd | 383 | asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX) |
6aa8b732 AK |
384 | : "=a"(value) : "d"(field) : "cc"); |
385 | return value; | |
386 | } | |
387 | ||
388 | static u16 vmcs_read16(unsigned long field) | |
389 | { | |
390 | return vmcs_readl(field); | |
391 | } | |
392 | ||
393 | static u32 vmcs_read32(unsigned long field) | |
394 | { | |
395 | return vmcs_readl(field); | |
396 | } | |
397 | ||
398 | static u64 vmcs_read64(unsigned long field) | |
399 | { | |
05b3e0c2 | 400 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
401 | return vmcs_readl(field); |
402 | #else | |
403 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); | |
404 | #endif | |
405 | } | |
406 | ||
e52de1b8 AK |
407 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
408 | { | |
409 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", | |
410 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); | |
411 | dump_stack(); | |
412 | } | |
413 | ||
6aa8b732 AK |
414 | static void vmcs_writel(unsigned long field, unsigned long value) |
415 | { | |
416 | u8 error; | |
417 | ||
4ecac3fd | 418 | asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0" |
d77c26fc | 419 | : "=q"(error) : "a"(value), "d"(field) : "cc"); |
e52de1b8 AK |
420 | if (unlikely(error)) |
421 | vmwrite_error(field, value); | |
6aa8b732 AK |
422 | } |
423 | ||
424 | static void vmcs_write16(unsigned long field, u16 value) | |
425 | { | |
426 | vmcs_writel(field, value); | |
427 | } | |
428 | ||
429 | static void vmcs_write32(unsigned long field, u32 value) | |
430 | { | |
431 | vmcs_writel(field, value); | |
432 | } | |
433 | ||
434 | static void vmcs_write64(unsigned long field, u64 value) | |
435 | { | |
6aa8b732 | 436 | vmcs_writel(field, value); |
7682f2d0 | 437 | #ifndef CONFIG_X86_64 |
6aa8b732 AK |
438 | asm volatile (""); |
439 | vmcs_writel(field+1, value >> 32); | |
440 | #endif | |
441 | } | |
442 | ||
2ab455cc AL |
443 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
444 | { | |
445 | vmcs_writel(field, vmcs_readl(field) & ~mask); | |
446 | } | |
447 | ||
448 | static void vmcs_set_bits(unsigned long field, u32 mask) | |
449 | { | |
450 | vmcs_writel(field, vmcs_readl(field) | mask); | |
451 | } | |
452 | ||
abd3f2d6 AK |
453 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
454 | { | |
455 | u32 eb; | |
456 | ||
7aa81cc0 | 457 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR); |
abd3f2d6 AK |
458 | if (!vcpu->fpu_active) |
459 | eb |= 1u << NM_VECTOR; | |
460 | if (vcpu->guest_debug.enabled) | |
461 | eb |= 1u << 1; | |
ad312c7c | 462 | if (vcpu->arch.rmode.active) |
abd3f2d6 | 463 | eb = ~0; |
1439442c SY |
464 | if (vm_need_ept()) |
465 | eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */ | |
abd3f2d6 AK |
466 | vmcs_write32(EXCEPTION_BITMAP, eb); |
467 | } | |
468 | ||
33ed6329 AK |
469 | static void reload_tss(void) |
470 | { | |
33ed6329 AK |
471 | /* |
472 | * VT restores TR but not its size. Useless. | |
473 | */ | |
474 | struct descriptor_table gdt; | |
a5f61300 | 475 | struct desc_struct *descs; |
33ed6329 AK |
476 | |
477 | get_gdt(&gdt); | |
478 | descs = (void *)gdt.base; | |
479 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ | |
480 | load_TR_desc(); | |
33ed6329 AK |
481 | } |
482 | ||
8b9cf98c | 483 | static void load_transition_efer(struct vcpu_vmx *vmx) |
2cc51560 | 484 | { |
a2fa3e9f | 485 | int efer_offset = vmx->msr_offset_efer; |
51c6cf66 AK |
486 | u64 host_efer = vmx->host_msrs[efer_offset].data; |
487 | u64 guest_efer = vmx->guest_msrs[efer_offset].data; | |
488 | u64 ignore_bits; | |
489 | ||
490 | if (efer_offset < 0) | |
491 | return; | |
492 | /* | |
493 | * NX is emulated; LMA and LME handled by hardware; SCE meaninless | |
494 | * outside long mode | |
495 | */ | |
496 | ignore_bits = EFER_NX | EFER_SCE; | |
497 | #ifdef CONFIG_X86_64 | |
498 | ignore_bits |= EFER_LMA | EFER_LME; | |
499 | /* SCE is meaningful only in long mode on Intel */ | |
500 | if (guest_efer & EFER_LMA) | |
501 | ignore_bits &= ~(u64)EFER_SCE; | |
502 | #endif | |
503 | if ((guest_efer & ~ignore_bits) == (host_efer & ~ignore_bits)) | |
504 | return; | |
2cc51560 | 505 | |
51c6cf66 AK |
506 | vmx->host_state.guest_efer_loaded = 1; |
507 | guest_efer &= ~ignore_bits; | |
508 | guest_efer |= host_efer & ignore_bits; | |
509 | wrmsrl(MSR_EFER, guest_efer); | |
8b9cf98c | 510 | vmx->vcpu.stat.efer_reload++; |
2cc51560 ED |
511 | } |
512 | ||
51c6cf66 AK |
513 | static void reload_host_efer(struct vcpu_vmx *vmx) |
514 | { | |
515 | if (vmx->host_state.guest_efer_loaded) { | |
516 | vmx->host_state.guest_efer_loaded = 0; | |
517 | load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1); | |
518 | } | |
519 | } | |
520 | ||
04d2cc77 | 521 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
33ed6329 | 522 | { |
04d2cc77 AK |
523 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
524 | ||
a2fa3e9f | 525 | if (vmx->host_state.loaded) |
33ed6329 AK |
526 | return; |
527 | ||
a2fa3e9f | 528 | vmx->host_state.loaded = 1; |
33ed6329 AK |
529 | /* |
530 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not | |
531 | * allow segment selectors with cpl > 0 or ti == 1. | |
532 | */ | |
a2fa3e9f | 533 | vmx->host_state.ldt_sel = read_ldt(); |
152d3f2f | 534 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
a2fa3e9f | 535 | vmx->host_state.fs_sel = read_fs(); |
152d3f2f | 536 | if (!(vmx->host_state.fs_sel & 7)) { |
a2fa3e9f | 537 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
152d3f2f LV |
538 | vmx->host_state.fs_reload_needed = 0; |
539 | } else { | |
33ed6329 | 540 | vmcs_write16(HOST_FS_SELECTOR, 0); |
152d3f2f | 541 | vmx->host_state.fs_reload_needed = 1; |
33ed6329 | 542 | } |
a2fa3e9f GH |
543 | vmx->host_state.gs_sel = read_gs(); |
544 | if (!(vmx->host_state.gs_sel & 7)) | |
545 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); | |
33ed6329 AK |
546 | else { |
547 | vmcs_write16(HOST_GS_SELECTOR, 0); | |
152d3f2f | 548 | vmx->host_state.gs_ldt_reload_needed = 1; |
33ed6329 AK |
549 | } |
550 | ||
551 | #ifdef CONFIG_X86_64 | |
552 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); | |
553 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); | |
554 | #else | |
a2fa3e9f GH |
555 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
556 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); | |
33ed6329 | 557 | #endif |
707c0874 AK |
558 | |
559 | #ifdef CONFIG_X86_64 | |
d77c26fc | 560 | if (is_long_mode(&vmx->vcpu)) |
a2fa3e9f GH |
561 | save_msrs(vmx->host_msrs + |
562 | vmx->msr_offset_kernel_gs_base, 1); | |
d77c26fc | 563 | |
707c0874 | 564 | #endif |
a2fa3e9f | 565 | load_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
51c6cf66 | 566 | load_transition_efer(vmx); |
33ed6329 AK |
567 | } |
568 | ||
a9b21b62 | 569 | static void __vmx_load_host_state(struct vcpu_vmx *vmx) |
33ed6329 | 570 | { |
15ad7146 | 571 | unsigned long flags; |
33ed6329 | 572 | |
a2fa3e9f | 573 | if (!vmx->host_state.loaded) |
33ed6329 AK |
574 | return; |
575 | ||
e1beb1d3 | 576 | ++vmx->vcpu.stat.host_state_reload; |
a2fa3e9f | 577 | vmx->host_state.loaded = 0; |
152d3f2f | 578 | if (vmx->host_state.fs_reload_needed) |
a2fa3e9f | 579 | load_fs(vmx->host_state.fs_sel); |
152d3f2f LV |
580 | if (vmx->host_state.gs_ldt_reload_needed) { |
581 | load_ldt(vmx->host_state.ldt_sel); | |
33ed6329 AK |
582 | /* |
583 | * If we have to reload gs, we must take care to | |
584 | * preserve our gs base. | |
585 | */ | |
15ad7146 | 586 | local_irq_save(flags); |
a2fa3e9f | 587 | load_gs(vmx->host_state.gs_sel); |
33ed6329 AK |
588 | #ifdef CONFIG_X86_64 |
589 | wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE)); | |
590 | #endif | |
15ad7146 | 591 | local_irq_restore(flags); |
33ed6329 | 592 | } |
152d3f2f | 593 | reload_tss(); |
a2fa3e9f GH |
594 | save_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
595 | load_msrs(vmx->host_msrs, vmx->save_nmsrs); | |
51c6cf66 | 596 | reload_host_efer(vmx); |
33ed6329 AK |
597 | } |
598 | ||
a9b21b62 AK |
599 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
600 | { | |
601 | preempt_disable(); | |
602 | __vmx_load_host_state(vmx); | |
603 | preempt_enable(); | |
604 | } | |
605 | ||
6aa8b732 AK |
606 | /* |
607 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes | |
608 | * vcpu mutex is already taken. | |
609 | */ | |
15ad7146 | 610 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 611 | { |
a2fa3e9f GH |
612 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
613 | u64 phys_addr = __pa(vmx->vmcs); | |
019960ae | 614 | u64 tsc_this, delta, new_offset; |
6aa8b732 | 615 | |
a3d7f85f | 616 | if (vcpu->cpu != cpu) { |
8b9cf98c | 617 | vcpu_clear(vmx); |
2f599714 | 618 | kvm_migrate_timers(vcpu); |
2384d2b3 | 619 | vpid_sync_vcpu_all(vmx); |
a3d7f85f | 620 | } |
6aa8b732 | 621 | |
a2fa3e9f | 622 | if (per_cpu(current_vmcs, cpu) != vmx->vmcs) { |
6aa8b732 AK |
623 | u8 error; |
624 | ||
a2fa3e9f | 625 | per_cpu(current_vmcs, cpu) = vmx->vmcs; |
4ecac3fd | 626 | asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0" |
6aa8b732 AK |
627 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
628 | : "cc"); | |
629 | if (error) | |
630 | printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n", | |
a2fa3e9f | 631 | vmx->vmcs, phys_addr); |
6aa8b732 AK |
632 | } |
633 | ||
634 | if (vcpu->cpu != cpu) { | |
635 | struct descriptor_table dt; | |
636 | unsigned long sysenter_esp; | |
637 | ||
638 | vcpu->cpu = cpu; | |
639 | /* | |
640 | * Linux uses per-cpu TSS and GDT, so set these when switching | |
641 | * processors. | |
642 | */ | |
643 | vmcs_writel(HOST_TR_BASE, read_tr_base()); /* 22.2.4 */ | |
644 | get_gdt(&dt); | |
645 | vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */ | |
646 | ||
647 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); | |
648 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ | |
7700270e AK |
649 | |
650 | /* | |
651 | * Make sure the time stamp counter is monotonous. | |
652 | */ | |
653 | rdtscll(tsc_this); | |
019960ae AK |
654 | if (tsc_this < vcpu->arch.host_tsc) { |
655 | delta = vcpu->arch.host_tsc - tsc_this; | |
656 | new_offset = vmcs_read64(TSC_OFFSET) + delta; | |
657 | vmcs_write64(TSC_OFFSET, new_offset); | |
658 | } | |
6aa8b732 | 659 | } |
6aa8b732 AK |
660 | } |
661 | ||
662 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) | |
663 | { | |
a9b21b62 | 664 | __vmx_load_host_state(to_vmx(vcpu)); |
6aa8b732 AK |
665 | } |
666 | ||
5fd86fcf AK |
667 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
668 | { | |
669 | if (vcpu->fpu_active) | |
670 | return; | |
671 | vcpu->fpu_active = 1; | |
707d92fa | 672 | vmcs_clear_bits(GUEST_CR0, X86_CR0_TS); |
ad312c7c | 673 | if (vcpu->arch.cr0 & X86_CR0_TS) |
707d92fa | 674 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
5fd86fcf AK |
675 | update_exception_bitmap(vcpu); |
676 | } | |
677 | ||
678 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) | |
679 | { | |
680 | if (!vcpu->fpu_active) | |
681 | return; | |
682 | vcpu->fpu_active = 0; | |
707d92fa | 683 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
5fd86fcf AK |
684 | update_exception_bitmap(vcpu); |
685 | } | |
686 | ||
774c47f1 AK |
687 | static void vmx_vcpu_decache(struct kvm_vcpu *vcpu) |
688 | { | |
8b9cf98c | 689 | vcpu_clear(to_vmx(vcpu)); |
774c47f1 AK |
690 | } |
691 | ||
6aa8b732 AK |
692 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
693 | { | |
694 | return vmcs_readl(GUEST_RFLAGS); | |
695 | } | |
696 | ||
697 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
698 | { | |
ad312c7c | 699 | if (vcpu->arch.rmode.active) |
053de044 | 700 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
701 | vmcs_writel(GUEST_RFLAGS, rflags); |
702 | } | |
703 | ||
704 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) | |
705 | { | |
706 | unsigned long rip; | |
707 | u32 interruptibility; | |
708 | ||
709 | rip = vmcs_readl(GUEST_RIP); | |
710 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
711 | vmcs_writel(GUEST_RIP, rip); | |
712 | ||
713 | /* | |
714 | * We emulated an instruction, so temporary interrupt blocking | |
715 | * should be removed, if set. | |
716 | */ | |
717 | interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
718 | if (interruptibility & 3) | |
719 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, | |
720 | interruptibility & ~3); | |
ad312c7c | 721 | vcpu->arch.interrupt_window_open = 1; |
6aa8b732 AK |
722 | } |
723 | ||
298101da AK |
724 | static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
725 | bool has_error_code, u32 error_code) | |
726 | { | |
727 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, | |
728 | nr | INTR_TYPE_EXCEPTION | |
2e11384c | 729 | | (has_error_code ? INTR_INFO_DELIVER_CODE_MASK : 0) |
298101da AK |
730 | | INTR_INFO_VALID_MASK); |
731 | if (has_error_code) | |
732 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); | |
733 | } | |
734 | ||
735 | static bool vmx_exception_injected(struct kvm_vcpu *vcpu) | |
736 | { | |
737 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
738 | ||
739 | return !(vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK); | |
740 | } | |
741 | ||
a75beee6 ED |
742 | /* |
743 | * Swap MSR entry in host/guest MSR entry array. | |
744 | */ | |
54e11fa1 | 745 | #ifdef CONFIG_X86_64 |
8b9cf98c | 746 | static void move_msr_up(struct vcpu_vmx *vmx, int from, int to) |
a75beee6 | 747 | { |
a2fa3e9f GH |
748 | struct kvm_msr_entry tmp; |
749 | ||
750 | tmp = vmx->guest_msrs[to]; | |
751 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; | |
752 | vmx->guest_msrs[from] = tmp; | |
753 | tmp = vmx->host_msrs[to]; | |
754 | vmx->host_msrs[to] = vmx->host_msrs[from]; | |
755 | vmx->host_msrs[from] = tmp; | |
a75beee6 | 756 | } |
54e11fa1 | 757 | #endif |
a75beee6 | 758 | |
e38aea3e AK |
759 | /* |
760 | * Set up the vmcs to automatically save and restore system | |
761 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy | |
762 | * mode, as fiddling with msrs is very expensive. | |
763 | */ | |
8b9cf98c | 764 | static void setup_msrs(struct vcpu_vmx *vmx) |
e38aea3e | 765 | { |
2cc51560 | 766 | int save_nmsrs; |
e38aea3e | 767 | |
33f9c505 | 768 | vmx_load_host_state(vmx); |
a75beee6 ED |
769 | save_nmsrs = 0; |
770 | #ifdef CONFIG_X86_64 | |
8b9cf98c | 771 | if (is_long_mode(&vmx->vcpu)) { |
2cc51560 ED |
772 | int index; |
773 | ||
8b9cf98c | 774 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
a75beee6 | 775 | if (index >= 0) |
8b9cf98c RR |
776 | move_msr_up(vmx, index, save_nmsrs++); |
777 | index = __find_msr_index(vmx, MSR_LSTAR); | |
a75beee6 | 778 | if (index >= 0) |
8b9cf98c RR |
779 | move_msr_up(vmx, index, save_nmsrs++); |
780 | index = __find_msr_index(vmx, MSR_CSTAR); | |
a75beee6 | 781 | if (index >= 0) |
8b9cf98c RR |
782 | move_msr_up(vmx, index, save_nmsrs++); |
783 | index = __find_msr_index(vmx, MSR_KERNEL_GS_BASE); | |
a75beee6 | 784 | if (index >= 0) |
8b9cf98c | 785 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
786 | /* |
787 | * MSR_K6_STAR is only needed on long mode guests, and only | |
788 | * if efer.sce is enabled. | |
789 | */ | |
8b9cf98c | 790 | index = __find_msr_index(vmx, MSR_K6_STAR); |
ad312c7c | 791 | if ((index >= 0) && (vmx->vcpu.arch.shadow_efer & EFER_SCE)) |
8b9cf98c | 792 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
793 | } |
794 | #endif | |
a2fa3e9f | 795 | vmx->save_nmsrs = save_nmsrs; |
e38aea3e | 796 | |
4d56c8a7 | 797 | #ifdef CONFIG_X86_64 |
a2fa3e9f | 798 | vmx->msr_offset_kernel_gs_base = |
8b9cf98c | 799 | __find_msr_index(vmx, MSR_KERNEL_GS_BASE); |
4d56c8a7 | 800 | #endif |
8b9cf98c | 801 | vmx->msr_offset_efer = __find_msr_index(vmx, MSR_EFER); |
e38aea3e AK |
802 | } |
803 | ||
6aa8b732 AK |
804 | /* |
805 | * reads and returns guest's timestamp counter "register" | |
806 | * guest_tsc = host_tsc + tsc_offset -- 21.3 | |
807 | */ | |
808 | static u64 guest_read_tsc(void) | |
809 | { | |
810 | u64 host_tsc, tsc_offset; | |
811 | ||
812 | rdtscll(host_tsc); | |
813 | tsc_offset = vmcs_read64(TSC_OFFSET); | |
814 | return host_tsc + tsc_offset; | |
815 | } | |
816 | ||
817 | /* | |
818 | * writes 'guest_tsc' into guest's timestamp counter "register" | |
819 | * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc | |
820 | */ | |
821 | static void guest_write_tsc(u64 guest_tsc) | |
822 | { | |
823 | u64 host_tsc; | |
824 | ||
825 | rdtscll(host_tsc); | |
826 | vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc); | |
827 | } | |
828 | ||
6aa8b732 AK |
829 | /* |
830 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
831 | * Returns 0 on success, non-0 otherwise. | |
832 | * Assumes vcpu_load() was already called. | |
833 | */ | |
834 | static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
835 | { | |
836 | u64 data; | |
a2fa3e9f | 837 | struct kvm_msr_entry *msr; |
6aa8b732 AK |
838 | |
839 | if (!pdata) { | |
840 | printk(KERN_ERR "BUG: get_msr called with NULL pdata\n"); | |
841 | return -EINVAL; | |
842 | } | |
843 | ||
844 | switch (msr_index) { | |
05b3e0c2 | 845 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
846 | case MSR_FS_BASE: |
847 | data = vmcs_readl(GUEST_FS_BASE); | |
848 | break; | |
849 | case MSR_GS_BASE: | |
850 | data = vmcs_readl(GUEST_GS_BASE); | |
851 | break; | |
852 | case MSR_EFER: | |
3bab1f5d | 853 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
6aa8b732 AK |
854 | #endif |
855 | case MSR_IA32_TIME_STAMP_COUNTER: | |
856 | data = guest_read_tsc(); | |
857 | break; | |
858 | case MSR_IA32_SYSENTER_CS: | |
859 | data = vmcs_read32(GUEST_SYSENTER_CS); | |
860 | break; | |
861 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 862 | data = vmcs_readl(GUEST_SYSENTER_EIP); |
6aa8b732 AK |
863 | break; |
864 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 865 | data = vmcs_readl(GUEST_SYSENTER_ESP); |
6aa8b732 | 866 | break; |
6aa8b732 | 867 | default: |
8b9cf98c | 868 | msr = find_msr_entry(to_vmx(vcpu), msr_index); |
3bab1f5d AK |
869 | if (msr) { |
870 | data = msr->data; | |
871 | break; | |
6aa8b732 | 872 | } |
3bab1f5d | 873 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
6aa8b732 AK |
874 | } |
875 | ||
876 | *pdata = data; | |
877 | return 0; | |
878 | } | |
879 | ||
880 | /* | |
881 | * Writes msr value into into the appropriate "register". | |
882 | * Returns 0 on success, non-0 otherwise. | |
883 | * Assumes vcpu_load() was already called. | |
884 | */ | |
885 | static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
886 | { | |
a2fa3e9f GH |
887 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
888 | struct kvm_msr_entry *msr; | |
2cc51560 ED |
889 | int ret = 0; |
890 | ||
6aa8b732 | 891 | switch (msr_index) { |
05b3e0c2 | 892 | #ifdef CONFIG_X86_64 |
3bab1f5d | 893 | case MSR_EFER: |
a9b21b62 | 894 | vmx_load_host_state(vmx); |
2cc51560 | 895 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
2cc51560 | 896 | break; |
6aa8b732 AK |
897 | case MSR_FS_BASE: |
898 | vmcs_writel(GUEST_FS_BASE, data); | |
899 | break; | |
900 | case MSR_GS_BASE: | |
901 | vmcs_writel(GUEST_GS_BASE, data); | |
902 | break; | |
903 | #endif | |
904 | case MSR_IA32_SYSENTER_CS: | |
905 | vmcs_write32(GUEST_SYSENTER_CS, data); | |
906 | break; | |
907 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 908 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
6aa8b732 AK |
909 | break; |
910 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 911 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
6aa8b732 | 912 | break; |
d27d4aca | 913 | case MSR_IA32_TIME_STAMP_COUNTER: |
6aa8b732 AK |
914 | guest_write_tsc(data); |
915 | break; | |
6aa8b732 | 916 | default: |
a9b21b62 | 917 | vmx_load_host_state(vmx); |
8b9cf98c | 918 | msr = find_msr_entry(vmx, msr_index); |
3bab1f5d AK |
919 | if (msr) { |
920 | msr->data = data; | |
921 | break; | |
6aa8b732 | 922 | } |
2cc51560 | 923 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
6aa8b732 AK |
924 | } |
925 | ||
2cc51560 | 926 | return ret; |
6aa8b732 AK |
927 | } |
928 | ||
929 | /* | |
930 | * Sync the rsp and rip registers into the vcpu structure. This allows | |
ad312c7c | 931 | * registers to be accessed by indexing vcpu->arch.regs. |
6aa8b732 AK |
932 | */ |
933 | static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu) | |
934 | { | |
ad312c7c ZX |
935 | vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); |
936 | vcpu->arch.rip = vmcs_readl(GUEST_RIP); | |
6aa8b732 AK |
937 | } |
938 | ||
939 | /* | |
940 | * Syncs rsp and rip back into the vmcs. Should be called after possible | |
941 | * modification. | |
942 | */ | |
943 | static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu) | |
944 | { | |
ad312c7c ZX |
945 | vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]); |
946 | vmcs_writel(GUEST_RIP, vcpu->arch.rip); | |
6aa8b732 AK |
947 | } |
948 | ||
949 | static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg) | |
950 | { | |
951 | unsigned long dr7 = 0x400; | |
6aa8b732 AK |
952 | int old_singlestep; |
953 | ||
6aa8b732 AK |
954 | old_singlestep = vcpu->guest_debug.singlestep; |
955 | ||
956 | vcpu->guest_debug.enabled = dbg->enabled; | |
957 | if (vcpu->guest_debug.enabled) { | |
958 | int i; | |
959 | ||
960 | dr7 |= 0x200; /* exact */ | |
961 | for (i = 0; i < 4; ++i) { | |
962 | if (!dbg->breakpoints[i].enabled) | |
963 | continue; | |
964 | vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address; | |
965 | dr7 |= 2 << (i*2); /* global enable */ | |
966 | dr7 |= 0 << (i*4+16); /* execution breakpoint */ | |
967 | } | |
968 | ||
6aa8b732 | 969 | vcpu->guest_debug.singlestep = dbg->singlestep; |
abd3f2d6 | 970 | } else |
6aa8b732 | 971 | vcpu->guest_debug.singlestep = 0; |
6aa8b732 AK |
972 | |
973 | if (old_singlestep && !vcpu->guest_debug.singlestep) { | |
974 | unsigned long flags; | |
975 | ||
976 | flags = vmcs_readl(GUEST_RFLAGS); | |
977 | flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
978 | vmcs_writel(GUEST_RFLAGS, flags); | |
979 | } | |
980 | ||
abd3f2d6 | 981 | update_exception_bitmap(vcpu); |
6aa8b732 AK |
982 | vmcs_writel(GUEST_DR7, dr7); |
983 | ||
984 | return 0; | |
985 | } | |
986 | ||
2a8067f1 ED |
987 | static int vmx_get_irq(struct kvm_vcpu *vcpu) |
988 | { | |
1155f76a | 989 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2a8067f1 ED |
990 | u32 idtv_info_field; |
991 | ||
1155f76a | 992 | idtv_info_field = vmx->idt_vectoring_info; |
2a8067f1 ED |
993 | if (idtv_info_field & INTR_INFO_VALID_MASK) { |
994 | if (is_external_interrupt(idtv_info_field)) | |
995 | return idtv_info_field & VECTORING_INFO_VECTOR_MASK; | |
996 | else | |
d77c26fc | 997 | printk(KERN_DEBUG "pending exception: not handled yet\n"); |
2a8067f1 ED |
998 | } |
999 | return -1; | |
1000 | } | |
1001 | ||
6aa8b732 AK |
1002 | static __init int cpu_has_kvm_support(void) |
1003 | { | |
1004 | unsigned long ecx = cpuid_ecx(1); | |
1005 | return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */ | |
1006 | } | |
1007 | ||
1008 | static __init int vmx_disabled_by_bios(void) | |
1009 | { | |
1010 | u64 msr; | |
1011 | ||
1012 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); | |
62b3ffb8 YS |
1013 | return (msr & (MSR_IA32_FEATURE_CONTROL_LOCKED | |
1014 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) | |
1015 | == MSR_IA32_FEATURE_CONTROL_LOCKED; | |
1016 | /* locked but not enabled */ | |
6aa8b732 AK |
1017 | } |
1018 | ||
774c47f1 | 1019 | static void hardware_enable(void *garbage) |
6aa8b732 AK |
1020 | { |
1021 | int cpu = raw_smp_processor_id(); | |
1022 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); | |
1023 | u64 old; | |
1024 | ||
1025 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); | |
62b3ffb8 YS |
1026 | if ((old & (MSR_IA32_FEATURE_CONTROL_LOCKED | |
1027 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) | |
1028 | != (MSR_IA32_FEATURE_CONTROL_LOCKED | | |
1029 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) | |
6aa8b732 | 1030 | /* enable and lock */ |
62b3ffb8 YS |
1031 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | |
1032 | MSR_IA32_FEATURE_CONTROL_LOCKED | | |
1033 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED); | |
66aee91a | 1034 | write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ |
4ecac3fd AK |
1035 | asm volatile (ASM_VMX_VMXON_RAX |
1036 | : : "a"(&phys_addr), "m"(phys_addr) | |
6aa8b732 AK |
1037 | : "memory", "cc"); |
1038 | } | |
1039 | ||
1040 | static void hardware_disable(void *garbage) | |
1041 | { | |
4ecac3fd | 1042 | asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc"); |
e693d71b | 1043 | write_cr4(read_cr4() & ~X86_CR4_VMXE); |
6aa8b732 AK |
1044 | } |
1045 | ||
1c3d14fe | 1046 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
d77c26fc | 1047 | u32 msr, u32 *result) |
1c3d14fe YS |
1048 | { |
1049 | u32 vmx_msr_low, vmx_msr_high; | |
1050 | u32 ctl = ctl_min | ctl_opt; | |
1051 | ||
1052 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
1053 | ||
1054 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ | |
1055 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ | |
1056 | ||
1057 | /* Ensure minimum (required) set of control bits are supported. */ | |
1058 | if (ctl_min & ~ctl) | |
002c7f7c | 1059 | return -EIO; |
1c3d14fe YS |
1060 | |
1061 | *result = ctl; | |
1062 | return 0; | |
1063 | } | |
1064 | ||
002c7f7c | 1065 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
6aa8b732 AK |
1066 | { |
1067 | u32 vmx_msr_low, vmx_msr_high; | |
d56f546d | 1068 | u32 min, opt, min2, opt2; |
1c3d14fe YS |
1069 | u32 _pin_based_exec_control = 0; |
1070 | u32 _cpu_based_exec_control = 0; | |
f78e0e2e | 1071 | u32 _cpu_based_2nd_exec_control = 0; |
1c3d14fe YS |
1072 | u32 _vmexit_control = 0; |
1073 | u32 _vmentry_control = 0; | |
1074 | ||
1075 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; | |
1076 | opt = 0; | |
1077 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, | |
1078 | &_pin_based_exec_control) < 0) | |
002c7f7c | 1079 | return -EIO; |
1c3d14fe YS |
1080 | |
1081 | min = CPU_BASED_HLT_EXITING | | |
1082 | #ifdef CONFIG_X86_64 | |
1083 | CPU_BASED_CR8_LOAD_EXITING | | |
1084 | CPU_BASED_CR8_STORE_EXITING | | |
1085 | #endif | |
d56f546d SY |
1086 | CPU_BASED_CR3_LOAD_EXITING | |
1087 | CPU_BASED_CR3_STORE_EXITING | | |
1c3d14fe YS |
1088 | CPU_BASED_USE_IO_BITMAPS | |
1089 | CPU_BASED_MOV_DR_EXITING | | |
1090 | CPU_BASED_USE_TSC_OFFSETING; | |
f78e0e2e | 1091 | opt = CPU_BASED_TPR_SHADOW | |
25c5f225 | 1092 | CPU_BASED_USE_MSR_BITMAPS | |
f78e0e2e | 1093 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
1c3d14fe YS |
1094 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
1095 | &_cpu_based_exec_control) < 0) | |
002c7f7c | 1096 | return -EIO; |
6e5d865c YS |
1097 | #ifdef CONFIG_X86_64 |
1098 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
1099 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & | |
1100 | ~CPU_BASED_CR8_STORE_EXITING; | |
1101 | #endif | |
f78e0e2e | 1102 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
d56f546d SY |
1103 | min2 = 0; |
1104 | opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | | |
2384d2b3 | 1105 | SECONDARY_EXEC_WBINVD_EXITING | |
d56f546d SY |
1106 | SECONDARY_EXEC_ENABLE_VPID | |
1107 | SECONDARY_EXEC_ENABLE_EPT; | |
1108 | if (adjust_vmx_controls(min2, opt2, | |
1109 | MSR_IA32_VMX_PROCBASED_CTLS2, | |
f78e0e2e SY |
1110 | &_cpu_based_2nd_exec_control) < 0) |
1111 | return -EIO; | |
1112 | } | |
1113 | #ifndef CONFIG_X86_64 | |
1114 | if (!(_cpu_based_2nd_exec_control & | |
1115 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
1116 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; | |
1117 | #endif | |
d56f546d SY |
1118 | if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) { |
1119 | /* CR3 accesses don't need to cause VM Exits when EPT enabled */ | |
1120 | min &= ~(CPU_BASED_CR3_LOAD_EXITING | | |
1121 | CPU_BASED_CR3_STORE_EXITING); | |
1122 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, | |
1123 | &_cpu_based_exec_control) < 0) | |
1124 | return -EIO; | |
1125 | rdmsr(MSR_IA32_VMX_EPT_VPID_CAP, | |
1126 | vmx_capability.ept, vmx_capability.vpid); | |
1127 | } | |
1c3d14fe YS |
1128 | |
1129 | min = 0; | |
1130 | #ifdef CONFIG_X86_64 | |
1131 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; | |
1132 | #endif | |
1133 | opt = 0; | |
1134 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, | |
1135 | &_vmexit_control) < 0) | |
002c7f7c | 1136 | return -EIO; |
1c3d14fe YS |
1137 | |
1138 | min = opt = 0; | |
1139 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, | |
1140 | &_vmentry_control) < 0) | |
002c7f7c | 1141 | return -EIO; |
6aa8b732 | 1142 | |
c68876fd | 1143 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
1c3d14fe YS |
1144 | |
1145 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ | |
1146 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) | |
002c7f7c | 1147 | return -EIO; |
1c3d14fe YS |
1148 | |
1149 | #ifdef CONFIG_X86_64 | |
1150 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ | |
1151 | if (vmx_msr_high & (1u<<16)) | |
002c7f7c | 1152 | return -EIO; |
1c3d14fe YS |
1153 | #endif |
1154 | ||
1155 | /* Require Write-Back (WB) memory type for VMCS accesses. */ | |
1156 | if (((vmx_msr_high >> 18) & 15) != 6) | |
002c7f7c | 1157 | return -EIO; |
1c3d14fe | 1158 | |
002c7f7c YS |
1159 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
1160 | vmcs_conf->order = get_order(vmcs_config.size); | |
1161 | vmcs_conf->revision_id = vmx_msr_low; | |
1c3d14fe | 1162 | |
002c7f7c YS |
1163 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
1164 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; | |
f78e0e2e | 1165 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
002c7f7c YS |
1166 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
1167 | vmcs_conf->vmentry_ctrl = _vmentry_control; | |
1c3d14fe YS |
1168 | |
1169 | return 0; | |
c68876fd | 1170 | } |
6aa8b732 AK |
1171 | |
1172 | static struct vmcs *alloc_vmcs_cpu(int cpu) | |
1173 | { | |
1174 | int node = cpu_to_node(cpu); | |
1175 | struct page *pages; | |
1176 | struct vmcs *vmcs; | |
1177 | ||
1c3d14fe | 1178 | pages = alloc_pages_node(node, GFP_KERNEL, vmcs_config.order); |
6aa8b732 AK |
1179 | if (!pages) |
1180 | return NULL; | |
1181 | vmcs = page_address(pages); | |
1c3d14fe YS |
1182 | memset(vmcs, 0, vmcs_config.size); |
1183 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ | |
6aa8b732 AK |
1184 | return vmcs; |
1185 | } | |
1186 | ||
1187 | static struct vmcs *alloc_vmcs(void) | |
1188 | { | |
d3b2c338 | 1189 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
6aa8b732 AK |
1190 | } |
1191 | ||
1192 | static void free_vmcs(struct vmcs *vmcs) | |
1193 | { | |
1c3d14fe | 1194 | free_pages((unsigned long)vmcs, vmcs_config.order); |
6aa8b732 AK |
1195 | } |
1196 | ||
39959588 | 1197 | static void free_kvm_area(void) |
6aa8b732 AK |
1198 | { |
1199 | int cpu; | |
1200 | ||
1201 | for_each_online_cpu(cpu) | |
1202 | free_vmcs(per_cpu(vmxarea, cpu)); | |
1203 | } | |
1204 | ||
6aa8b732 AK |
1205 | static __init int alloc_kvm_area(void) |
1206 | { | |
1207 | int cpu; | |
1208 | ||
1209 | for_each_online_cpu(cpu) { | |
1210 | struct vmcs *vmcs; | |
1211 | ||
1212 | vmcs = alloc_vmcs_cpu(cpu); | |
1213 | if (!vmcs) { | |
1214 | free_kvm_area(); | |
1215 | return -ENOMEM; | |
1216 | } | |
1217 | ||
1218 | per_cpu(vmxarea, cpu) = vmcs; | |
1219 | } | |
1220 | return 0; | |
1221 | } | |
1222 | ||
1223 | static __init int hardware_setup(void) | |
1224 | { | |
002c7f7c YS |
1225 | if (setup_vmcs_config(&vmcs_config) < 0) |
1226 | return -EIO; | |
50a37eb4 JR |
1227 | |
1228 | if (boot_cpu_has(X86_FEATURE_NX)) | |
1229 | kvm_enable_efer_bits(EFER_NX); | |
1230 | ||
6aa8b732 AK |
1231 | return alloc_kvm_area(); |
1232 | } | |
1233 | ||
1234 | static __exit void hardware_unsetup(void) | |
1235 | { | |
1236 | free_kvm_area(); | |
1237 | } | |
1238 | ||
6aa8b732 AK |
1239 | static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save) |
1240 | { | |
1241 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1242 | ||
6af11b9e | 1243 | if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) { |
6aa8b732 AK |
1244 | vmcs_write16(sf->selector, save->selector); |
1245 | vmcs_writel(sf->base, save->base); | |
1246 | vmcs_write32(sf->limit, save->limit); | |
1247 | vmcs_write32(sf->ar_bytes, save->ar); | |
1248 | } else { | |
1249 | u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK) | |
1250 | << AR_DPL_SHIFT; | |
1251 | vmcs_write32(sf->ar_bytes, 0x93 | dpl); | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | static void enter_pmode(struct kvm_vcpu *vcpu) | |
1256 | { | |
1257 | unsigned long flags; | |
1258 | ||
ad312c7c | 1259 | vcpu->arch.rmode.active = 0; |
6aa8b732 | 1260 | |
ad312c7c ZX |
1261 | vmcs_writel(GUEST_TR_BASE, vcpu->arch.rmode.tr.base); |
1262 | vmcs_write32(GUEST_TR_LIMIT, vcpu->arch.rmode.tr.limit); | |
1263 | vmcs_write32(GUEST_TR_AR_BYTES, vcpu->arch.rmode.tr.ar); | |
6aa8b732 AK |
1264 | |
1265 | flags = vmcs_readl(GUEST_RFLAGS); | |
053de044 | 1266 | flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM); |
ad312c7c | 1267 | flags |= (vcpu->arch.rmode.save_iopl << IOPL_SHIFT); |
6aa8b732 AK |
1268 | vmcs_writel(GUEST_RFLAGS, flags); |
1269 | ||
66aee91a RR |
1270 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
1271 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); | |
6aa8b732 AK |
1272 | |
1273 | update_exception_bitmap(vcpu); | |
1274 | ||
ad312c7c ZX |
1275 | fix_pmode_dataseg(VCPU_SREG_ES, &vcpu->arch.rmode.es); |
1276 | fix_pmode_dataseg(VCPU_SREG_DS, &vcpu->arch.rmode.ds); | |
1277 | fix_pmode_dataseg(VCPU_SREG_GS, &vcpu->arch.rmode.gs); | |
1278 | fix_pmode_dataseg(VCPU_SREG_FS, &vcpu->arch.rmode.fs); | |
6aa8b732 AK |
1279 | |
1280 | vmcs_write16(GUEST_SS_SELECTOR, 0); | |
1281 | vmcs_write32(GUEST_SS_AR_BYTES, 0x93); | |
1282 | ||
1283 | vmcs_write16(GUEST_CS_SELECTOR, | |
1284 | vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK); | |
1285 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); | |
1286 | } | |
1287 | ||
d77c26fc | 1288 | static gva_t rmode_tss_base(struct kvm *kvm) |
6aa8b732 | 1289 | { |
bfc6d222 | 1290 | if (!kvm->arch.tss_addr) { |
cbc94022 IE |
1291 | gfn_t base_gfn = kvm->memslots[0].base_gfn + |
1292 | kvm->memslots[0].npages - 3; | |
1293 | return base_gfn << PAGE_SHIFT; | |
1294 | } | |
bfc6d222 | 1295 | return kvm->arch.tss_addr; |
6aa8b732 AK |
1296 | } |
1297 | ||
1298 | static void fix_rmode_seg(int seg, struct kvm_save_segment *save) | |
1299 | { | |
1300 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1301 | ||
1302 | save->selector = vmcs_read16(sf->selector); | |
1303 | save->base = vmcs_readl(sf->base); | |
1304 | save->limit = vmcs_read32(sf->limit); | |
1305 | save->ar = vmcs_read32(sf->ar_bytes); | |
15b00f32 JK |
1306 | vmcs_write16(sf->selector, save->base >> 4); |
1307 | vmcs_write32(sf->base, save->base & 0xfffff); | |
6aa8b732 AK |
1308 | vmcs_write32(sf->limit, 0xffff); |
1309 | vmcs_write32(sf->ar_bytes, 0xf3); | |
1310 | } | |
1311 | ||
1312 | static void enter_rmode(struct kvm_vcpu *vcpu) | |
1313 | { | |
1314 | unsigned long flags; | |
1315 | ||
ad312c7c | 1316 | vcpu->arch.rmode.active = 1; |
6aa8b732 | 1317 | |
ad312c7c | 1318 | vcpu->arch.rmode.tr.base = vmcs_readl(GUEST_TR_BASE); |
6aa8b732 AK |
1319 | vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); |
1320 | ||
ad312c7c | 1321 | vcpu->arch.rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT); |
6aa8b732 AK |
1322 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
1323 | ||
ad312c7c | 1324 | vcpu->arch.rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES); |
6aa8b732 AK |
1325 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
1326 | ||
1327 | flags = vmcs_readl(GUEST_RFLAGS); | |
ad312c7c ZX |
1328 | vcpu->arch.rmode.save_iopl |
1329 | = (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT; | |
6aa8b732 | 1330 | |
053de044 | 1331 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
1332 | |
1333 | vmcs_writel(GUEST_RFLAGS, flags); | |
66aee91a | 1334 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
6aa8b732 AK |
1335 | update_exception_bitmap(vcpu); |
1336 | ||
1337 | vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4); | |
1338 | vmcs_write32(GUEST_SS_LIMIT, 0xffff); | |
1339 | vmcs_write32(GUEST_SS_AR_BYTES, 0xf3); | |
1340 | ||
1341 | vmcs_write32(GUEST_CS_AR_BYTES, 0xf3); | |
abacf8df | 1342 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
8cb5b033 AK |
1343 | if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000) |
1344 | vmcs_writel(GUEST_CS_BASE, 0xf0000); | |
6aa8b732 AK |
1345 | vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4); |
1346 | ||
ad312c7c ZX |
1347 | fix_rmode_seg(VCPU_SREG_ES, &vcpu->arch.rmode.es); |
1348 | fix_rmode_seg(VCPU_SREG_DS, &vcpu->arch.rmode.ds); | |
1349 | fix_rmode_seg(VCPU_SREG_GS, &vcpu->arch.rmode.gs); | |
1350 | fix_rmode_seg(VCPU_SREG_FS, &vcpu->arch.rmode.fs); | |
75880a01 | 1351 | |
8668a3c4 | 1352 | kvm_mmu_reset_context(vcpu); |
b7ebfb05 | 1353 | init_rmode(vcpu->kvm); |
6aa8b732 AK |
1354 | } |
1355 | ||
05b3e0c2 | 1356 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1357 | |
1358 | static void enter_lmode(struct kvm_vcpu *vcpu) | |
1359 | { | |
1360 | u32 guest_tr_ar; | |
1361 | ||
1362 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); | |
1363 | if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) { | |
1364 | printk(KERN_DEBUG "%s: tss fixup for long mode. \n", | |
b8688d51 | 1365 | __func__); |
6aa8b732 AK |
1366 | vmcs_write32(GUEST_TR_AR_BYTES, |
1367 | (guest_tr_ar & ~AR_TYPE_MASK) | |
1368 | | AR_TYPE_BUSY_64_TSS); | |
1369 | } | |
1370 | ||
ad312c7c | 1371 | vcpu->arch.shadow_efer |= EFER_LMA; |
6aa8b732 | 1372 | |
8b9cf98c | 1373 | find_msr_entry(to_vmx(vcpu), MSR_EFER)->data |= EFER_LMA | EFER_LME; |
6aa8b732 AK |
1374 | vmcs_write32(VM_ENTRY_CONTROLS, |
1375 | vmcs_read32(VM_ENTRY_CONTROLS) | |
1e4e6e00 | 1376 | | VM_ENTRY_IA32E_MODE); |
6aa8b732 AK |
1377 | } |
1378 | ||
1379 | static void exit_lmode(struct kvm_vcpu *vcpu) | |
1380 | { | |
ad312c7c | 1381 | vcpu->arch.shadow_efer &= ~EFER_LMA; |
6aa8b732 AK |
1382 | |
1383 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1384 | vmcs_read32(VM_ENTRY_CONTROLS) | |
1e4e6e00 | 1385 | & ~VM_ENTRY_IA32E_MODE); |
6aa8b732 AK |
1386 | } |
1387 | ||
1388 | #endif | |
1389 | ||
2384d2b3 SY |
1390 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
1391 | { | |
1392 | vpid_sync_vcpu_all(to_vmx(vcpu)); | |
1393 | } | |
1394 | ||
25c4c276 | 1395 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 | 1396 | { |
ad312c7c ZX |
1397 | vcpu->arch.cr4 &= KVM_GUEST_CR4_MASK; |
1398 | vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK; | |
399badf3 AK |
1399 | } |
1400 | ||
1439442c SY |
1401 | static void ept_load_pdptrs(struct kvm_vcpu *vcpu) |
1402 | { | |
1403 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { | |
1404 | if (!load_pdptrs(vcpu, vcpu->arch.cr3)) { | |
1405 | printk(KERN_ERR "EPT: Fail to load pdptrs!\n"); | |
1406 | return; | |
1407 | } | |
1408 | vmcs_write64(GUEST_PDPTR0, vcpu->arch.pdptrs[0]); | |
1409 | vmcs_write64(GUEST_PDPTR1, vcpu->arch.pdptrs[1]); | |
1410 | vmcs_write64(GUEST_PDPTR2, vcpu->arch.pdptrs[2]); | |
1411 | vmcs_write64(GUEST_PDPTR3, vcpu->arch.pdptrs[3]); | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); | |
1416 | ||
1417 | static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, | |
1418 | unsigned long cr0, | |
1419 | struct kvm_vcpu *vcpu) | |
1420 | { | |
1421 | if (!(cr0 & X86_CR0_PG)) { | |
1422 | /* From paging/starting to nonpaging */ | |
1423 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
1424 | vmcs_config.cpu_based_exec_ctrl | | |
1425 | (CPU_BASED_CR3_LOAD_EXITING | | |
1426 | CPU_BASED_CR3_STORE_EXITING)); | |
1427 | vcpu->arch.cr0 = cr0; | |
1428 | vmx_set_cr4(vcpu, vcpu->arch.cr4); | |
1429 | *hw_cr0 |= X86_CR0_PE | X86_CR0_PG; | |
1430 | *hw_cr0 &= ~X86_CR0_WP; | |
1431 | } else if (!is_paging(vcpu)) { | |
1432 | /* From nonpaging to paging */ | |
1433 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
1434 | vmcs_config.cpu_based_exec_ctrl & | |
1435 | ~(CPU_BASED_CR3_LOAD_EXITING | | |
1436 | CPU_BASED_CR3_STORE_EXITING)); | |
1437 | vcpu->arch.cr0 = cr0; | |
1438 | vmx_set_cr4(vcpu, vcpu->arch.cr4); | |
1439 | if (!(vcpu->arch.cr0 & X86_CR0_WP)) | |
1440 | *hw_cr0 &= ~X86_CR0_WP; | |
1441 | } | |
1442 | } | |
1443 | ||
1444 | static void ept_update_paging_mode_cr4(unsigned long *hw_cr4, | |
1445 | struct kvm_vcpu *vcpu) | |
1446 | { | |
1447 | if (!is_paging(vcpu)) { | |
1448 | *hw_cr4 &= ~X86_CR4_PAE; | |
1449 | *hw_cr4 |= X86_CR4_PSE; | |
1450 | } else if (!(vcpu->arch.cr4 & X86_CR4_PAE)) | |
1451 | *hw_cr4 &= ~X86_CR4_PAE; | |
1452 | } | |
1453 | ||
6aa8b732 AK |
1454 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
1455 | { | |
1439442c SY |
1456 | unsigned long hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | |
1457 | KVM_VM_CR0_ALWAYS_ON; | |
1458 | ||
5fd86fcf AK |
1459 | vmx_fpu_deactivate(vcpu); |
1460 | ||
ad312c7c | 1461 | if (vcpu->arch.rmode.active && (cr0 & X86_CR0_PE)) |
6aa8b732 AK |
1462 | enter_pmode(vcpu); |
1463 | ||
ad312c7c | 1464 | if (!vcpu->arch.rmode.active && !(cr0 & X86_CR0_PE)) |
6aa8b732 AK |
1465 | enter_rmode(vcpu); |
1466 | ||
05b3e0c2 | 1467 | #ifdef CONFIG_X86_64 |
ad312c7c | 1468 | if (vcpu->arch.shadow_efer & EFER_LME) { |
707d92fa | 1469 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
6aa8b732 | 1470 | enter_lmode(vcpu); |
707d92fa | 1471 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
6aa8b732 AK |
1472 | exit_lmode(vcpu); |
1473 | } | |
1474 | #endif | |
1475 | ||
1439442c SY |
1476 | if (vm_need_ept()) |
1477 | ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu); | |
1478 | ||
6aa8b732 | 1479 | vmcs_writel(CR0_READ_SHADOW, cr0); |
1439442c | 1480 | vmcs_writel(GUEST_CR0, hw_cr0); |
ad312c7c | 1481 | vcpu->arch.cr0 = cr0; |
5fd86fcf | 1482 | |
707d92fa | 1483 | if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE)) |
5fd86fcf | 1484 | vmx_fpu_activate(vcpu); |
6aa8b732 AK |
1485 | } |
1486 | ||
1439442c SY |
1487 | static u64 construct_eptp(unsigned long root_hpa) |
1488 | { | |
1489 | u64 eptp; | |
1490 | ||
1491 | /* TODO write the value reading from MSR */ | |
1492 | eptp = VMX_EPT_DEFAULT_MT | | |
1493 | VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT; | |
1494 | eptp |= (root_hpa & PAGE_MASK); | |
1495 | ||
1496 | return eptp; | |
1497 | } | |
1498 | ||
6aa8b732 AK |
1499 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
1500 | { | |
1439442c SY |
1501 | unsigned long guest_cr3; |
1502 | u64 eptp; | |
1503 | ||
1504 | guest_cr3 = cr3; | |
1505 | if (vm_need_ept()) { | |
1506 | eptp = construct_eptp(cr3); | |
1507 | vmcs_write64(EPT_POINTER, eptp); | |
1508 | ept_sync_context(eptp); | |
1509 | ept_load_pdptrs(vcpu); | |
1510 | guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 : | |
1511 | VMX_EPT_IDENTITY_PAGETABLE_ADDR; | |
1512 | } | |
1513 | ||
2384d2b3 | 1514 | vmx_flush_tlb(vcpu); |
1439442c | 1515 | vmcs_writel(GUEST_CR3, guest_cr3); |
ad312c7c | 1516 | if (vcpu->arch.cr0 & X86_CR0_PE) |
5fd86fcf | 1517 | vmx_fpu_deactivate(vcpu); |
6aa8b732 AK |
1518 | } |
1519 | ||
1520 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
1521 | { | |
1439442c SY |
1522 | unsigned long hw_cr4 = cr4 | (vcpu->arch.rmode.active ? |
1523 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON); | |
1524 | ||
ad312c7c | 1525 | vcpu->arch.cr4 = cr4; |
1439442c SY |
1526 | if (vm_need_ept()) |
1527 | ept_update_paging_mode_cr4(&hw_cr4, vcpu); | |
1528 | ||
1529 | vmcs_writel(CR4_READ_SHADOW, cr4); | |
1530 | vmcs_writel(GUEST_CR4, hw_cr4); | |
6aa8b732 AK |
1531 | } |
1532 | ||
6aa8b732 AK |
1533 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
1534 | { | |
8b9cf98c RR |
1535 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
1536 | struct kvm_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); | |
6aa8b732 | 1537 | |
ad312c7c | 1538 | vcpu->arch.shadow_efer = efer; |
9f62e19a JR |
1539 | if (!msr) |
1540 | return; | |
6aa8b732 AK |
1541 | if (efer & EFER_LMA) { |
1542 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1543 | vmcs_read32(VM_ENTRY_CONTROLS) | | |
1e4e6e00 | 1544 | VM_ENTRY_IA32E_MODE); |
6aa8b732 AK |
1545 | msr->data = efer; |
1546 | ||
1547 | } else { | |
1548 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1549 | vmcs_read32(VM_ENTRY_CONTROLS) & | |
1e4e6e00 | 1550 | ~VM_ENTRY_IA32E_MODE); |
6aa8b732 AK |
1551 | |
1552 | msr->data = efer & ~EFER_LME; | |
1553 | } | |
8b9cf98c | 1554 | setup_msrs(vmx); |
6aa8b732 AK |
1555 | } |
1556 | ||
6aa8b732 AK |
1557 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
1558 | { | |
1559 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1560 | ||
1561 | return vmcs_readl(sf->base); | |
1562 | } | |
1563 | ||
1564 | static void vmx_get_segment(struct kvm_vcpu *vcpu, | |
1565 | struct kvm_segment *var, int seg) | |
1566 | { | |
1567 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1568 | u32 ar; | |
1569 | ||
1570 | var->base = vmcs_readl(sf->base); | |
1571 | var->limit = vmcs_read32(sf->limit); | |
1572 | var->selector = vmcs_read16(sf->selector); | |
1573 | ar = vmcs_read32(sf->ar_bytes); | |
1574 | if (ar & AR_UNUSABLE_MASK) | |
1575 | ar = 0; | |
1576 | var->type = ar & 15; | |
1577 | var->s = (ar >> 4) & 1; | |
1578 | var->dpl = (ar >> 5) & 3; | |
1579 | var->present = (ar >> 7) & 1; | |
1580 | var->avl = (ar >> 12) & 1; | |
1581 | var->l = (ar >> 13) & 1; | |
1582 | var->db = (ar >> 14) & 1; | |
1583 | var->g = (ar >> 15) & 1; | |
1584 | var->unusable = (ar >> 16) & 1; | |
1585 | } | |
1586 | ||
2e4d2653 IE |
1587 | static int vmx_get_cpl(struct kvm_vcpu *vcpu) |
1588 | { | |
1589 | struct kvm_segment kvm_seg; | |
1590 | ||
1591 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) /* if real mode */ | |
1592 | return 0; | |
1593 | ||
1594 | if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */ | |
1595 | return 3; | |
1596 | ||
1597 | vmx_get_segment(vcpu, &kvm_seg, VCPU_SREG_CS); | |
1598 | return kvm_seg.selector & 3; | |
1599 | } | |
1600 | ||
653e3108 | 1601 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
6aa8b732 | 1602 | { |
6aa8b732 AK |
1603 | u32 ar; |
1604 | ||
653e3108 | 1605 | if (var->unusable) |
6aa8b732 AK |
1606 | ar = 1 << 16; |
1607 | else { | |
1608 | ar = var->type & 15; | |
1609 | ar |= (var->s & 1) << 4; | |
1610 | ar |= (var->dpl & 3) << 5; | |
1611 | ar |= (var->present & 1) << 7; | |
1612 | ar |= (var->avl & 1) << 12; | |
1613 | ar |= (var->l & 1) << 13; | |
1614 | ar |= (var->db & 1) << 14; | |
1615 | ar |= (var->g & 1) << 15; | |
1616 | } | |
f7fbf1fd UL |
1617 | if (ar == 0) /* a 0 value means unusable */ |
1618 | ar = AR_UNUSABLE_MASK; | |
653e3108 AK |
1619 | |
1620 | return ar; | |
1621 | } | |
1622 | ||
1623 | static void vmx_set_segment(struct kvm_vcpu *vcpu, | |
1624 | struct kvm_segment *var, int seg) | |
1625 | { | |
1626 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1627 | u32 ar; | |
1628 | ||
ad312c7c ZX |
1629 | if (vcpu->arch.rmode.active && seg == VCPU_SREG_TR) { |
1630 | vcpu->arch.rmode.tr.selector = var->selector; | |
1631 | vcpu->arch.rmode.tr.base = var->base; | |
1632 | vcpu->arch.rmode.tr.limit = var->limit; | |
1633 | vcpu->arch.rmode.tr.ar = vmx_segment_access_rights(var); | |
653e3108 AK |
1634 | return; |
1635 | } | |
1636 | vmcs_writel(sf->base, var->base); | |
1637 | vmcs_write32(sf->limit, var->limit); | |
1638 | vmcs_write16(sf->selector, var->selector); | |
ad312c7c | 1639 | if (vcpu->arch.rmode.active && var->s) { |
653e3108 AK |
1640 | /* |
1641 | * Hack real-mode segments into vm86 compatibility. | |
1642 | */ | |
1643 | if (var->base == 0xffff0000 && var->selector == 0xf000) | |
1644 | vmcs_writel(sf->base, 0xf0000); | |
1645 | ar = 0xf3; | |
1646 | } else | |
1647 | ar = vmx_segment_access_rights(var); | |
6aa8b732 AK |
1648 | vmcs_write32(sf->ar_bytes, ar); |
1649 | } | |
1650 | ||
6aa8b732 AK |
1651 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
1652 | { | |
1653 | u32 ar = vmcs_read32(GUEST_CS_AR_BYTES); | |
1654 | ||
1655 | *db = (ar >> 14) & 1; | |
1656 | *l = (ar >> 13) & 1; | |
1657 | } | |
1658 | ||
1659 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1660 | { | |
1661 | dt->limit = vmcs_read32(GUEST_IDTR_LIMIT); | |
1662 | dt->base = vmcs_readl(GUEST_IDTR_BASE); | |
1663 | } | |
1664 | ||
1665 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1666 | { | |
1667 | vmcs_write32(GUEST_IDTR_LIMIT, dt->limit); | |
1668 | vmcs_writel(GUEST_IDTR_BASE, dt->base); | |
1669 | } | |
1670 | ||
1671 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1672 | { | |
1673 | dt->limit = vmcs_read32(GUEST_GDTR_LIMIT); | |
1674 | dt->base = vmcs_readl(GUEST_GDTR_BASE); | |
1675 | } | |
1676 | ||
1677 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1678 | { | |
1679 | vmcs_write32(GUEST_GDTR_LIMIT, dt->limit); | |
1680 | vmcs_writel(GUEST_GDTR_BASE, dt->base); | |
1681 | } | |
1682 | ||
d77c26fc | 1683 | static int init_rmode_tss(struct kvm *kvm) |
6aa8b732 | 1684 | { |
6aa8b732 | 1685 | gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT; |
195aefde | 1686 | u16 data = 0; |
10589a46 | 1687 | int ret = 0; |
195aefde | 1688 | int r; |
6aa8b732 | 1689 | |
195aefde IE |
1690 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
1691 | if (r < 0) | |
10589a46 | 1692 | goto out; |
195aefde IE |
1693 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
1694 | r = kvm_write_guest_page(kvm, fn++, &data, 0x66, sizeof(u16)); | |
1695 | if (r < 0) | |
10589a46 | 1696 | goto out; |
195aefde IE |
1697 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
1698 | if (r < 0) | |
10589a46 | 1699 | goto out; |
195aefde IE |
1700 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
1701 | if (r < 0) | |
10589a46 | 1702 | goto out; |
195aefde | 1703 | data = ~0; |
10589a46 MT |
1704 | r = kvm_write_guest_page(kvm, fn, &data, |
1705 | RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, | |
1706 | sizeof(u8)); | |
195aefde | 1707 | if (r < 0) |
10589a46 MT |
1708 | goto out; |
1709 | ||
1710 | ret = 1; | |
1711 | out: | |
10589a46 | 1712 | return ret; |
6aa8b732 AK |
1713 | } |
1714 | ||
b7ebfb05 SY |
1715 | static int init_rmode_identity_map(struct kvm *kvm) |
1716 | { | |
1717 | int i, r, ret; | |
1718 | pfn_t identity_map_pfn; | |
1719 | u32 tmp; | |
1720 | ||
1721 | if (!vm_need_ept()) | |
1722 | return 1; | |
1723 | if (unlikely(!kvm->arch.ept_identity_pagetable)) { | |
1724 | printk(KERN_ERR "EPT: identity-mapping pagetable " | |
1725 | "haven't been allocated!\n"); | |
1726 | return 0; | |
1727 | } | |
1728 | if (likely(kvm->arch.ept_identity_pagetable_done)) | |
1729 | return 1; | |
1730 | ret = 0; | |
1731 | identity_map_pfn = VMX_EPT_IDENTITY_PAGETABLE_ADDR >> PAGE_SHIFT; | |
1732 | r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE); | |
1733 | if (r < 0) | |
1734 | goto out; | |
1735 | /* Set up identity-mapping pagetable for EPT in real mode */ | |
1736 | for (i = 0; i < PT32_ENT_PER_PAGE; i++) { | |
1737 | tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | | |
1738 | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE); | |
1739 | r = kvm_write_guest_page(kvm, identity_map_pfn, | |
1740 | &tmp, i * sizeof(tmp), sizeof(tmp)); | |
1741 | if (r < 0) | |
1742 | goto out; | |
1743 | } | |
1744 | kvm->arch.ept_identity_pagetable_done = true; | |
1745 | ret = 1; | |
1746 | out: | |
1747 | return ret; | |
1748 | } | |
1749 | ||
6aa8b732 AK |
1750 | static void seg_setup(int seg) |
1751 | { | |
1752 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1753 | ||
1754 | vmcs_write16(sf->selector, 0); | |
1755 | vmcs_writel(sf->base, 0); | |
1756 | vmcs_write32(sf->limit, 0xffff); | |
1757 | vmcs_write32(sf->ar_bytes, 0x93); | |
1758 | } | |
1759 | ||
f78e0e2e SY |
1760 | static int alloc_apic_access_page(struct kvm *kvm) |
1761 | { | |
1762 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
1763 | int r = 0; | |
1764 | ||
72dc67a6 | 1765 | down_write(&kvm->slots_lock); |
bfc6d222 | 1766 | if (kvm->arch.apic_access_page) |
f78e0e2e SY |
1767 | goto out; |
1768 | kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; | |
1769 | kvm_userspace_mem.flags = 0; | |
1770 | kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL; | |
1771 | kvm_userspace_mem.memory_size = PAGE_SIZE; | |
1772 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
1773 | if (r) | |
1774 | goto out; | |
72dc67a6 IE |
1775 | |
1776 | down_read(¤t->mm->mmap_sem); | |
bfc6d222 | 1777 | kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00); |
72dc67a6 | 1778 | up_read(¤t->mm->mmap_sem); |
f78e0e2e | 1779 | out: |
72dc67a6 | 1780 | up_write(&kvm->slots_lock); |
f78e0e2e SY |
1781 | return r; |
1782 | } | |
1783 | ||
b7ebfb05 SY |
1784 | static int alloc_identity_pagetable(struct kvm *kvm) |
1785 | { | |
1786 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
1787 | int r = 0; | |
1788 | ||
1789 | down_write(&kvm->slots_lock); | |
1790 | if (kvm->arch.ept_identity_pagetable) | |
1791 | goto out; | |
1792 | kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; | |
1793 | kvm_userspace_mem.flags = 0; | |
1794 | kvm_userspace_mem.guest_phys_addr = VMX_EPT_IDENTITY_PAGETABLE_ADDR; | |
1795 | kvm_userspace_mem.memory_size = PAGE_SIZE; | |
1796 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
1797 | if (r) | |
1798 | goto out; | |
1799 | ||
1800 | down_read(¤t->mm->mmap_sem); | |
1801 | kvm->arch.ept_identity_pagetable = gfn_to_page(kvm, | |
1802 | VMX_EPT_IDENTITY_PAGETABLE_ADDR >> PAGE_SHIFT); | |
1803 | up_read(¤t->mm->mmap_sem); | |
1804 | out: | |
1805 | up_write(&kvm->slots_lock); | |
1806 | return r; | |
1807 | } | |
1808 | ||
2384d2b3 SY |
1809 | static void allocate_vpid(struct vcpu_vmx *vmx) |
1810 | { | |
1811 | int vpid; | |
1812 | ||
1813 | vmx->vpid = 0; | |
1814 | if (!enable_vpid || !cpu_has_vmx_vpid()) | |
1815 | return; | |
1816 | spin_lock(&vmx_vpid_lock); | |
1817 | vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS); | |
1818 | if (vpid < VMX_NR_VPIDS) { | |
1819 | vmx->vpid = vpid; | |
1820 | __set_bit(vpid, vmx_vpid_bitmap); | |
1821 | } | |
1822 | spin_unlock(&vmx_vpid_lock); | |
1823 | } | |
1824 | ||
8b2cf73c | 1825 | static void vmx_disable_intercept_for_msr(struct page *msr_bitmap, u32 msr) |
25c5f225 SY |
1826 | { |
1827 | void *va; | |
1828 | ||
1829 | if (!cpu_has_vmx_msr_bitmap()) | |
1830 | return; | |
1831 | ||
1832 | /* | |
1833 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
1834 | * have the write-low and read-high bitmap offsets the wrong way round. | |
1835 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
1836 | */ | |
1837 | va = kmap(msr_bitmap); | |
1838 | if (msr <= 0x1fff) { | |
1839 | __clear_bit(msr, va + 0x000); /* read-low */ | |
1840 | __clear_bit(msr, va + 0x800); /* write-low */ | |
1841 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { | |
1842 | msr &= 0x1fff; | |
1843 | __clear_bit(msr, va + 0x400); /* read-high */ | |
1844 | __clear_bit(msr, va + 0xc00); /* write-high */ | |
1845 | } | |
1846 | kunmap(msr_bitmap); | |
1847 | } | |
1848 | ||
6aa8b732 AK |
1849 | /* |
1850 | * Sets up the vmcs for emulated real mode. | |
1851 | */ | |
8b9cf98c | 1852 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
6aa8b732 AK |
1853 | { |
1854 | u32 host_sysenter_cs; | |
1855 | u32 junk; | |
1856 | unsigned long a; | |
1857 | struct descriptor_table dt; | |
1858 | int i; | |
cd2276a7 | 1859 | unsigned long kvm_vmx_return; |
6e5d865c | 1860 | u32 exec_control; |
6aa8b732 | 1861 | |
6aa8b732 | 1862 | /* I/O */ |
fdef3ad1 HQ |
1863 | vmcs_write64(IO_BITMAP_A, page_to_phys(vmx_io_bitmap_a)); |
1864 | vmcs_write64(IO_BITMAP_B, page_to_phys(vmx_io_bitmap_b)); | |
6aa8b732 | 1865 | |
25c5f225 SY |
1866 | if (cpu_has_vmx_msr_bitmap()) |
1867 | vmcs_write64(MSR_BITMAP, page_to_phys(vmx_msr_bitmap)); | |
1868 | ||
6aa8b732 AK |
1869 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
1870 | ||
6aa8b732 | 1871 | /* Control */ |
1c3d14fe YS |
1872 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, |
1873 | vmcs_config.pin_based_exec_ctrl); | |
6e5d865c YS |
1874 | |
1875 | exec_control = vmcs_config.cpu_based_exec_ctrl; | |
1876 | if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { | |
1877 | exec_control &= ~CPU_BASED_TPR_SHADOW; | |
1878 | #ifdef CONFIG_X86_64 | |
1879 | exec_control |= CPU_BASED_CR8_STORE_EXITING | | |
1880 | CPU_BASED_CR8_LOAD_EXITING; | |
1881 | #endif | |
1882 | } | |
d56f546d SY |
1883 | if (!vm_need_ept()) |
1884 | exec_control |= CPU_BASED_CR3_STORE_EXITING | | |
1885 | CPU_BASED_CR3_LOAD_EXITING; | |
6e5d865c | 1886 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); |
6aa8b732 | 1887 | |
83ff3b9d SY |
1888 | if (cpu_has_secondary_exec_ctrls()) { |
1889 | exec_control = vmcs_config.cpu_based_2nd_exec_ctrl; | |
1890 | if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
1891 | exec_control &= | |
1892 | ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
2384d2b3 SY |
1893 | if (vmx->vpid == 0) |
1894 | exec_control &= ~SECONDARY_EXEC_ENABLE_VPID; | |
d56f546d SY |
1895 | if (!vm_need_ept()) |
1896 | exec_control &= ~SECONDARY_EXEC_ENABLE_EPT; | |
83ff3b9d SY |
1897 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); |
1898 | } | |
f78e0e2e | 1899 | |
c7addb90 AK |
1900 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf); |
1901 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf); | |
6aa8b732 AK |
1902 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
1903 | ||
1904 | vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */ | |
1905 | vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */ | |
1906 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ | |
1907 | ||
1908 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ | |
1909 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
1910 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
1911 | vmcs_write16(HOST_FS_SELECTOR, read_fs()); /* 22.2.4 */ | |
1912 | vmcs_write16(HOST_GS_SELECTOR, read_gs()); /* 22.2.4 */ | |
1913 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
05b3e0c2 | 1914 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1915 | rdmsrl(MSR_FS_BASE, a); |
1916 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ | |
1917 | rdmsrl(MSR_GS_BASE, a); | |
1918 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ | |
1919 | #else | |
1920 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ | |
1921 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ | |
1922 | #endif | |
1923 | ||
1924 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ | |
1925 | ||
1926 | get_idt(&dt); | |
1927 | vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */ | |
1928 | ||
d77c26fc | 1929 | asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return)); |
cd2276a7 | 1930 | vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */ |
2cc51560 ED |
1931 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
1932 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); | |
1933 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); | |
6aa8b732 AK |
1934 | |
1935 | rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk); | |
1936 | vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs); | |
1937 | rdmsrl(MSR_IA32_SYSENTER_ESP, a); | |
1938 | vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */ | |
1939 | rdmsrl(MSR_IA32_SYSENTER_EIP, a); | |
1940 | vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */ | |
1941 | ||
6aa8b732 AK |
1942 | for (i = 0; i < NR_VMX_MSR; ++i) { |
1943 | u32 index = vmx_msr_index[i]; | |
1944 | u32 data_low, data_high; | |
1945 | u64 data; | |
a2fa3e9f | 1946 | int j = vmx->nmsrs; |
6aa8b732 AK |
1947 | |
1948 | if (rdmsr_safe(index, &data_low, &data_high) < 0) | |
1949 | continue; | |
432bd6cb AK |
1950 | if (wrmsr_safe(index, data_low, data_high) < 0) |
1951 | continue; | |
6aa8b732 | 1952 | data = data_low | ((u64)data_high << 32); |
a2fa3e9f GH |
1953 | vmx->host_msrs[j].index = index; |
1954 | vmx->host_msrs[j].reserved = 0; | |
1955 | vmx->host_msrs[j].data = data; | |
1956 | vmx->guest_msrs[j] = vmx->host_msrs[j]; | |
1957 | ++vmx->nmsrs; | |
6aa8b732 | 1958 | } |
6aa8b732 | 1959 | |
1c3d14fe | 1960 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
6aa8b732 AK |
1961 | |
1962 | /* 22.2.1, 20.8.1 */ | |
1c3d14fe YS |
1963 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl); |
1964 | ||
e00c8cf2 AK |
1965 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
1966 | vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK); | |
1967 | ||
f78e0e2e | 1968 | |
e00c8cf2 AK |
1969 | return 0; |
1970 | } | |
1971 | ||
b7ebfb05 SY |
1972 | static int init_rmode(struct kvm *kvm) |
1973 | { | |
1974 | if (!init_rmode_tss(kvm)) | |
1975 | return 0; | |
1976 | if (!init_rmode_identity_map(kvm)) | |
1977 | return 0; | |
1978 | return 1; | |
1979 | } | |
1980 | ||
e00c8cf2 AK |
1981 | static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) |
1982 | { | |
1983 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
1984 | u64 msr; | |
1985 | int ret; | |
1986 | ||
3200f405 | 1987 | down_read(&vcpu->kvm->slots_lock); |
b7ebfb05 | 1988 | if (!init_rmode(vmx->vcpu.kvm)) { |
e00c8cf2 AK |
1989 | ret = -ENOMEM; |
1990 | goto out; | |
1991 | } | |
1992 | ||
ad312c7c | 1993 | vmx->vcpu.arch.rmode.active = 0; |
e00c8cf2 | 1994 | |
ad312c7c | 1995 | vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
2d3ad1f4 | 1996 | kvm_set_cr8(&vmx->vcpu, 0); |
e00c8cf2 AK |
1997 | msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
1998 | if (vmx->vcpu.vcpu_id == 0) | |
1999 | msr |= MSR_IA32_APICBASE_BSP; | |
2000 | kvm_set_apic_base(&vmx->vcpu, msr); | |
2001 | ||
2002 | fx_init(&vmx->vcpu); | |
2003 | ||
2004 | /* | |
2005 | * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode | |
2006 | * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh. | |
2007 | */ | |
2008 | if (vmx->vcpu.vcpu_id == 0) { | |
2009 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); | |
2010 | vmcs_writel(GUEST_CS_BASE, 0x000f0000); | |
2011 | } else { | |
ad312c7c ZX |
2012 | vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8); |
2013 | vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12); | |
e00c8cf2 AK |
2014 | } |
2015 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); | |
2016 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); | |
2017 | ||
2018 | seg_setup(VCPU_SREG_DS); | |
2019 | seg_setup(VCPU_SREG_ES); | |
2020 | seg_setup(VCPU_SREG_FS); | |
2021 | seg_setup(VCPU_SREG_GS); | |
2022 | seg_setup(VCPU_SREG_SS); | |
2023 | ||
2024 | vmcs_write16(GUEST_TR_SELECTOR, 0); | |
2025 | vmcs_writel(GUEST_TR_BASE, 0); | |
2026 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); | |
2027 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); | |
2028 | ||
2029 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); | |
2030 | vmcs_writel(GUEST_LDTR_BASE, 0); | |
2031 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); | |
2032 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); | |
2033 | ||
2034 | vmcs_write32(GUEST_SYSENTER_CS, 0); | |
2035 | vmcs_writel(GUEST_SYSENTER_ESP, 0); | |
2036 | vmcs_writel(GUEST_SYSENTER_EIP, 0); | |
2037 | ||
2038 | vmcs_writel(GUEST_RFLAGS, 0x02); | |
2039 | if (vmx->vcpu.vcpu_id == 0) | |
2040 | vmcs_writel(GUEST_RIP, 0xfff0); | |
2041 | else | |
2042 | vmcs_writel(GUEST_RIP, 0); | |
2043 | vmcs_writel(GUEST_RSP, 0); | |
2044 | ||
2045 | /* todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0 */ | |
2046 | vmcs_writel(GUEST_DR7, 0x400); | |
2047 | ||
2048 | vmcs_writel(GUEST_GDTR_BASE, 0); | |
2049 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); | |
2050 | ||
2051 | vmcs_writel(GUEST_IDTR_BASE, 0); | |
2052 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); | |
2053 | ||
2054 | vmcs_write32(GUEST_ACTIVITY_STATE, 0); | |
2055 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); | |
2056 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); | |
2057 | ||
2058 | guest_write_tsc(0); | |
2059 | ||
2060 | /* Special registers */ | |
2061 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
2062 | ||
2063 | setup_msrs(vmx); | |
2064 | ||
6aa8b732 AK |
2065 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
2066 | ||
f78e0e2e SY |
2067 | if (cpu_has_vmx_tpr_shadow()) { |
2068 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); | |
2069 | if (vm_need_tpr_shadow(vmx->vcpu.kvm)) | |
2070 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, | |
ad312c7c | 2071 | page_to_phys(vmx->vcpu.arch.apic->regs_page)); |
f78e0e2e SY |
2072 | vmcs_write32(TPR_THRESHOLD, 0); |
2073 | } | |
2074 | ||
2075 | if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
2076 | vmcs_write64(APIC_ACCESS_ADDR, | |
bfc6d222 | 2077 | page_to_phys(vmx->vcpu.kvm->arch.apic_access_page)); |
6aa8b732 | 2078 | |
2384d2b3 SY |
2079 | if (vmx->vpid != 0) |
2080 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
2081 | ||
ad312c7c ZX |
2082 | vmx->vcpu.arch.cr0 = 0x60000010; |
2083 | vmx_set_cr0(&vmx->vcpu, vmx->vcpu.arch.cr0); /* enter rmode */ | |
8b9cf98c | 2084 | vmx_set_cr4(&vmx->vcpu, 0); |
8b9cf98c | 2085 | vmx_set_efer(&vmx->vcpu, 0); |
8b9cf98c RR |
2086 | vmx_fpu_activate(&vmx->vcpu); |
2087 | update_exception_bitmap(&vmx->vcpu); | |
6aa8b732 | 2088 | |
2384d2b3 SY |
2089 | vpid_sync_vcpu_all(vmx); |
2090 | ||
3200f405 | 2091 | ret = 0; |
6aa8b732 | 2092 | |
6aa8b732 | 2093 | out: |
3200f405 | 2094 | up_read(&vcpu->kvm->slots_lock); |
6aa8b732 AK |
2095 | return ret; |
2096 | } | |
2097 | ||
85f455f7 ED |
2098 | static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq) |
2099 | { | |
9c8cba37 AK |
2100 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2101 | ||
2714d1d3 FEL |
2102 | KVMTRACE_1D(INJ_VIRQ, vcpu, (u32)irq, handler); |
2103 | ||
ad312c7c | 2104 | if (vcpu->arch.rmode.active) { |
9c8cba37 AK |
2105 | vmx->rmode.irq.pending = true; |
2106 | vmx->rmode.irq.vector = irq; | |
2107 | vmx->rmode.irq.rip = vmcs_readl(GUEST_RIP); | |
9c5623e3 AK |
2108 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
2109 | irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK); | |
2110 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1); | |
9c8cba37 | 2111 | vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip - 1); |
85f455f7 ED |
2112 | return; |
2113 | } | |
2114 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, | |
2115 | irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); | |
2116 | } | |
2117 | ||
6aa8b732 AK |
2118 | static void kvm_do_inject_irq(struct kvm_vcpu *vcpu) |
2119 | { | |
ad312c7c ZX |
2120 | int word_index = __ffs(vcpu->arch.irq_summary); |
2121 | int bit_index = __ffs(vcpu->arch.irq_pending[word_index]); | |
6aa8b732 AK |
2122 | int irq = word_index * BITS_PER_LONG + bit_index; |
2123 | ||
ad312c7c ZX |
2124 | clear_bit(bit_index, &vcpu->arch.irq_pending[word_index]); |
2125 | if (!vcpu->arch.irq_pending[word_index]) | |
2126 | clear_bit(word_index, &vcpu->arch.irq_summary); | |
85f455f7 | 2127 | vmx_inject_irq(vcpu, irq); |
6aa8b732 AK |
2128 | } |
2129 | ||
c1150d8c DL |
2130 | |
2131 | static void do_interrupt_requests(struct kvm_vcpu *vcpu, | |
2132 | struct kvm_run *kvm_run) | |
6aa8b732 | 2133 | { |
c1150d8c DL |
2134 | u32 cpu_based_vm_exec_control; |
2135 | ||
ad312c7c | 2136 | vcpu->arch.interrupt_window_open = |
c1150d8c DL |
2137 | ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
2138 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); | |
2139 | ||
ad312c7c ZX |
2140 | if (vcpu->arch.interrupt_window_open && |
2141 | vcpu->arch.irq_summary && | |
c1150d8c | 2142 | !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK)) |
6aa8b732 | 2143 | /* |
c1150d8c | 2144 | * If interrupts enabled, and not blocked by sti or mov ss. Good. |
6aa8b732 AK |
2145 | */ |
2146 | kvm_do_inject_irq(vcpu); | |
c1150d8c DL |
2147 | |
2148 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
ad312c7c ZX |
2149 | if (!vcpu->arch.interrupt_window_open && |
2150 | (vcpu->arch.irq_summary || kvm_run->request_interrupt_window)) | |
6aa8b732 AK |
2151 | /* |
2152 | * Interrupts blocked. Wait for unblock. | |
2153 | */ | |
c1150d8c DL |
2154 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; |
2155 | else | |
2156 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
2157 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
6aa8b732 AK |
2158 | } |
2159 | ||
cbc94022 IE |
2160 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
2161 | { | |
2162 | int ret; | |
2163 | struct kvm_userspace_memory_region tss_mem = { | |
2164 | .slot = 8, | |
2165 | .guest_phys_addr = addr, | |
2166 | .memory_size = PAGE_SIZE * 3, | |
2167 | .flags = 0, | |
2168 | }; | |
2169 | ||
2170 | ret = kvm_set_memory_region(kvm, &tss_mem, 0); | |
2171 | if (ret) | |
2172 | return ret; | |
bfc6d222 | 2173 | kvm->arch.tss_addr = addr; |
cbc94022 IE |
2174 | return 0; |
2175 | } | |
2176 | ||
6aa8b732 AK |
2177 | static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu) |
2178 | { | |
2179 | struct kvm_guest_debug *dbg = &vcpu->guest_debug; | |
2180 | ||
2181 | set_debugreg(dbg->bp[0], 0); | |
2182 | set_debugreg(dbg->bp[1], 1); | |
2183 | set_debugreg(dbg->bp[2], 2); | |
2184 | set_debugreg(dbg->bp[3], 3); | |
2185 | ||
2186 | if (dbg->singlestep) { | |
2187 | unsigned long flags; | |
2188 | ||
2189 | flags = vmcs_readl(GUEST_RFLAGS); | |
2190 | flags |= X86_EFLAGS_TF | X86_EFLAGS_RF; | |
2191 | vmcs_writel(GUEST_RFLAGS, flags); | |
2192 | } | |
2193 | } | |
2194 | ||
2195 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, | |
2196 | int vec, u32 err_code) | |
2197 | { | |
ad312c7c | 2198 | if (!vcpu->arch.rmode.active) |
6aa8b732 AK |
2199 | return 0; |
2200 | ||
b3f37707 NK |
2201 | /* |
2202 | * Instruction with address size override prefix opcode 0x67 | |
2203 | * Cause the #SS fault with 0 error code in VM86 mode. | |
2204 | */ | |
2205 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) | |
3427318f | 2206 | if (emulate_instruction(vcpu, NULL, 0, 0, 0) == EMULATE_DONE) |
6aa8b732 AK |
2207 | return 1; |
2208 | return 0; | |
2209 | } | |
2210 | ||
2211 | static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2212 | { | |
1155f76a | 2213 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 AK |
2214 | u32 intr_info, error_code; |
2215 | unsigned long cr2, rip; | |
2216 | u32 vect_info; | |
2217 | enum emulation_result er; | |
2218 | ||
1155f76a | 2219 | vect_info = vmx->idt_vectoring_info; |
6aa8b732 AK |
2220 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
2221 | ||
2222 | if ((vect_info & VECTORING_INFO_VALID_MASK) && | |
d77c26fc | 2223 | !is_page_fault(intr_info)) |
6aa8b732 | 2224 | printk(KERN_ERR "%s: unexpected, vectoring info 0x%x " |
b8688d51 | 2225 | "intr info 0x%x\n", __func__, vect_info, intr_info); |
6aa8b732 | 2226 | |
85f455f7 | 2227 | if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) { |
6aa8b732 | 2228 | int irq = vect_info & VECTORING_INFO_VECTOR_MASK; |
ad312c7c ZX |
2229 | set_bit(irq, vcpu->arch.irq_pending); |
2230 | set_bit(irq / BITS_PER_LONG, &vcpu->arch.irq_summary); | |
6aa8b732 AK |
2231 | } |
2232 | ||
1b6269db AK |
2233 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ |
2234 | return 1; /* already handled by vmx_vcpu_run() */ | |
2ab455cc AL |
2235 | |
2236 | if (is_no_device(intr_info)) { | |
5fd86fcf | 2237 | vmx_fpu_activate(vcpu); |
2ab455cc AL |
2238 | return 1; |
2239 | } | |
2240 | ||
7aa81cc0 | 2241 | if (is_invalid_opcode(intr_info)) { |
571008da | 2242 | er = emulate_instruction(vcpu, kvm_run, 0, 0, EMULTYPE_TRAP_UD); |
7aa81cc0 | 2243 | if (er != EMULATE_DONE) |
7ee5d940 | 2244 | kvm_queue_exception(vcpu, UD_VECTOR); |
7aa81cc0 AL |
2245 | return 1; |
2246 | } | |
2247 | ||
6aa8b732 AK |
2248 | error_code = 0; |
2249 | rip = vmcs_readl(GUEST_RIP); | |
2e11384c | 2250 | if (intr_info & INTR_INFO_DELIVER_CODE_MASK) |
6aa8b732 AK |
2251 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
2252 | if (is_page_fault(intr_info)) { | |
1439442c SY |
2253 | /* EPT won't cause page fault directly */ |
2254 | if (vm_need_ept()) | |
2255 | BUG(); | |
6aa8b732 | 2256 | cr2 = vmcs_readl(EXIT_QUALIFICATION); |
2714d1d3 FEL |
2257 | KVMTRACE_3D(PAGE_FAULT, vcpu, error_code, (u32)cr2, |
2258 | (u32)((u64)cr2 >> 32), handler); | |
3067714c | 2259 | return kvm_mmu_page_fault(vcpu, cr2, error_code); |
6aa8b732 AK |
2260 | } |
2261 | ||
ad312c7c | 2262 | if (vcpu->arch.rmode.active && |
6aa8b732 | 2263 | handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK, |
72d6e5a0 | 2264 | error_code)) { |
ad312c7c ZX |
2265 | if (vcpu->arch.halt_request) { |
2266 | vcpu->arch.halt_request = 0; | |
72d6e5a0 AK |
2267 | return kvm_emulate_halt(vcpu); |
2268 | } | |
6aa8b732 | 2269 | return 1; |
72d6e5a0 | 2270 | } |
6aa8b732 | 2271 | |
d77c26fc MD |
2272 | if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) == |
2273 | (INTR_TYPE_EXCEPTION | 1)) { | |
6aa8b732 AK |
2274 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
2275 | return 0; | |
2276 | } | |
2277 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; | |
2278 | kvm_run->ex.exception = intr_info & INTR_INFO_VECTOR_MASK; | |
2279 | kvm_run->ex.error_code = error_code; | |
2280 | return 0; | |
2281 | } | |
2282 | ||
2283 | static int handle_external_interrupt(struct kvm_vcpu *vcpu, | |
2284 | struct kvm_run *kvm_run) | |
2285 | { | |
1165f5fe | 2286 | ++vcpu->stat.irq_exits; |
2714d1d3 | 2287 | KVMTRACE_1D(INTR, vcpu, vmcs_read32(VM_EXIT_INTR_INFO), handler); |
6aa8b732 AK |
2288 | return 1; |
2289 | } | |
2290 | ||
988ad74f AK |
2291 | static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2292 | { | |
2293 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
2294 | return 0; | |
2295 | } | |
6aa8b732 | 2296 | |
6aa8b732 AK |
2297 | static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2298 | { | |
bfdaab09 | 2299 | unsigned long exit_qualification; |
039576c0 AK |
2300 | int size, down, in, string, rep; |
2301 | unsigned port; | |
6aa8b732 | 2302 | |
1165f5fe | 2303 | ++vcpu->stat.io_exits; |
bfdaab09 | 2304 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
039576c0 | 2305 | string = (exit_qualification & 16) != 0; |
e70669ab LV |
2306 | |
2307 | if (string) { | |
3427318f LV |
2308 | if (emulate_instruction(vcpu, |
2309 | kvm_run, 0, 0, 0) == EMULATE_DO_MMIO) | |
e70669ab LV |
2310 | return 0; |
2311 | return 1; | |
2312 | } | |
2313 | ||
2314 | size = (exit_qualification & 7) + 1; | |
2315 | in = (exit_qualification & 8) != 0; | |
039576c0 | 2316 | down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0; |
039576c0 AK |
2317 | rep = (exit_qualification & 32) != 0; |
2318 | port = exit_qualification >> 16; | |
e70669ab | 2319 | |
3090dd73 | 2320 | return kvm_emulate_pio(vcpu, kvm_run, in, size, port); |
6aa8b732 AK |
2321 | } |
2322 | ||
102d8325 IM |
2323 | static void |
2324 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
2325 | { | |
2326 | /* | |
2327 | * Patch in the VMCALL instruction: | |
2328 | */ | |
2329 | hypercall[0] = 0x0f; | |
2330 | hypercall[1] = 0x01; | |
2331 | hypercall[2] = 0xc1; | |
102d8325 IM |
2332 | } |
2333 | ||
6aa8b732 AK |
2334 | static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2335 | { | |
bfdaab09 | 2336 | unsigned long exit_qualification; |
6aa8b732 AK |
2337 | int cr; |
2338 | int reg; | |
2339 | ||
bfdaab09 | 2340 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
6aa8b732 AK |
2341 | cr = exit_qualification & 15; |
2342 | reg = (exit_qualification >> 8) & 15; | |
2343 | switch ((exit_qualification >> 4) & 3) { | |
2344 | case 0: /* mov to cr */ | |
2714d1d3 FEL |
2345 | KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr, (u32)vcpu->arch.regs[reg], |
2346 | (u32)((u64)vcpu->arch.regs[reg] >> 32), handler); | |
6aa8b732 AK |
2347 | switch (cr) { |
2348 | case 0: | |
2349 | vcpu_load_rsp_rip(vcpu); | |
2d3ad1f4 | 2350 | kvm_set_cr0(vcpu, vcpu->arch.regs[reg]); |
6aa8b732 AK |
2351 | skip_emulated_instruction(vcpu); |
2352 | return 1; | |
2353 | case 3: | |
2354 | vcpu_load_rsp_rip(vcpu); | |
2d3ad1f4 | 2355 | kvm_set_cr3(vcpu, vcpu->arch.regs[reg]); |
6aa8b732 AK |
2356 | skip_emulated_instruction(vcpu); |
2357 | return 1; | |
2358 | case 4: | |
2359 | vcpu_load_rsp_rip(vcpu); | |
2d3ad1f4 | 2360 | kvm_set_cr4(vcpu, vcpu->arch.regs[reg]); |
6aa8b732 AK |
2361 | skip_emulated_instruction(vcpu); |
2362 | return 1; | |
2363 | case 8: | |
2364 | vcpu_load_rsp_rip(vcpu); | |
2d3ad1f4 | 2365 | kvm_set_cr8(vcpu, vcpu->arch.regs[reg]); |
6aa8b732 | 2366 | skip_emulated_instruction(vcpu); |
e5314067 AK |
2367 | if (irqchip_in_kernel(vcpu->kvm)) |
2368 | return 1; | |
253abdee YS |
2369 | kvm_run->exit_reason = KVM_EXIT_SET_TPR; |
2370 | return 0; | |
6aa8b732 AK |
2371 | }; |
2372 | break; | |
25c4c276 AL |
2373 | case 2: /* clts */ |
2374 | vcpu_load_rsp_rip(vcpu); | |
5fd86fcf | 2375 | vmx_fpu_deactivate(vcpu); |
ad312c7c ZX |
2376 | vcpu->arch.cr0 &= ~X86_CR0_TS; |
2377 | vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0); | |
5fd86fcf | 2378 | vmx_fpu_activate(vcpu); |
2714d1d3 | 2379 | KVMTRACE_0D(CLTS, vcpu, handler); |
25c4c276 AL |
2380 | skip_emulated_instruction(vcpu); |
2381 | return 1; | |
6aa8b732 AK |
2382 | case 1: /*mov from cr*/ |
2383 | switch (cr) { | |
2384 | case 3: | |
2385 | vcpu_load_rsp_rip(vcpu); | |
ad312c7c | 2386 | vcpu->arch.regs[reg] = vcpu->arch.cr3; |
6aa8b732 | 2387 | vcpu_put_rsp_rip(vcpu); |
2714d1d3 FEL |
2388 | KVMTRACE_3D(CR_READ, vcpu, (u32)cr, |
2389 | (u32)vcpu->arch.regs[reg], | |
2390 | (u32)((u64)vcpu->arch.regs[reg] >> 32), | |
2391 | handler); | |
6aa8b732 AK |
2392 | skip_emulated_instruction(vcpu); |
2393 | return 1; | |
2394 | case 8: | |
6aa8b732 | 2395 | vcpu_load_rsp_rip(vcpu); |
2d3ad1f4 | 2396 | vcpu->arch.regs[reg] = kvm_get_cr8(vcpu); |
6aa8b732 | 2397 | vcpu_put_rsp_rip(vcpu); |
2714d1d3 FEL |
2398 | KVMTRACE_2D(CR_READ, vcpu, (u32)cr, |
2399 | (u32)vcpu->arch.regs[reg], handler); | |
6aa8b732 AK |
2400 | skip_emulated_instruction(vcpu); |
2401 | return 1; | |
2402 | } | |
2403 | break; | |
2404 | case 3: /* lmsw */ | |
2d3ad1f4 | 2405 | kvm_lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f); |
6aa8b732 AK |
2406 | |
2407 | skip_emulated_instruction(vcpu); | |
2408 | return 1; | |
2409 | default: | |
2410 | break; | |
2411 | } | |
2412 | kvm_run->exit_reason = 0; | |
f0242478 | 2413 | pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
6aa8b732 AK |
2414 | (int)(exit_qualification >> 4) & 3, cr); |
2415 | return 0; | |
2416 | } | |
2417 | ||
2418 | static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2419 | { | |
bfdaab09 | 2420 | unsigned long exit_qualification; |
6aa8b732 AK |
2421 | unsigned long val; |
2422 | int dr, reg; | |
2423 | ||
2424 | /* | |
2425 | * FIXME: this code assumes the host is debugging the guest. | |
2426 | * need to deal with guest debugging itself too. | |
2427 | */ | |
bfdaab09 | 2428 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
6aa8b732 AK |
2429 | dr = exit_qualification & 7; |
2430 | reg = (exit_qualification >> 8) & 15; | |
2431 | vcpu_load_rsp_rip(vcpu); | |
2432 | if (exit_qualification & 16) { | |
2433 | /* mov from dr */ | |
2434 | switch (dr) { | |
2435 | case 6: | |
2436 | val = 0xffff0ff0; | |
2437 | break; | |
2438 | case 7: | |
2439 | val = 0x400; | |
2440 | break; | |
2441 | default: | |
2442 | val = 0; | |
2443 | } | |
ad312c7c | 2444 | vcpu->arch.regs[reg] = val; |
2714d1d3 | 2445 | KVMTRACE_2D(DR_READ, vcpu, (u32)dr, (u32)val, handler); |
6aa8b732 AK |
2446 | } else { |
2447 | /* mov to dr */ | |
2448 | } | |
2449 | vcpu_put_rsp_rip(vcpu); | |
2450 | skip_emulated_instruction(vcpu); | |
2451 | return 1; | |
2452 | } | |
2453 | ||
2454 | static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2455 | { | |
06465c5a AK |
2456 | kvm_emulate_cpuid(vcpu); |
2457 | return 1; | |
6aa8b732 AK |
2458 | } |
2459 | ||
2460 | static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2461 | { | |
ad312c7c | 2462 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
6aa8b732 AK |
2463 | u64 data; |
2464 | ||
2465 | if (vmx_get_msr(vcpu, ecx, &data)) { | |
c1a5d4f9 | 2466 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
2467 | return 1; |
2468 | } | |
2469 | ||
2714d1d3 FEL |
2470 | KVMTRACE_3D(MSR_READ, vcpu, ecx, (u32)data, (u32)(data >> 32), |
2471 | handler); | |
2472 | ||
6aa8b732 | 2473 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
ad312c7c ZX |
2474 | vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u; |
2475 | vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u; | |
6aa8b732 AK |
2476 | skip_emulated_instruction(vcpu); |
2477 | return 1; | |
2478 | } | |
2479 | ||
2480 | static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2481 | { | |
ad312c7c ZX |
2482 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
2483 | u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u) | |
2484 | | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32); | |
6aa8b732 | 2485 | |
2714d1d3 FEL |
2486 | KVMTRACE_3D(MSR_WRITE, vcpu, ecx, (u32)data, (u32)(data >> 32), |
2487 | handler); | |
2488 | ||
6aa8b732 | 2489 | if (vmx_set_msr(vcpu, ecx, data) != 0) { |
c1a5d4f9 | 2490 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
2491 | return 1; |
2492 | } | |
2493 | ||
2494 | skip_emulated_instruction(vcpu); | |
2495 | return 1; | |
2496 | } | |
2497 | ||
6e5d865c YS |
2498 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu, |
2499 | struct kvm_run *kvm_run) | |
2500 | { | |
2501 | return 1; | |
2502 | } | |
2503 | ||
6aa8b732 AK |
2504 | static int handle_interrupt_window(struct kvm_vcpu *vcpu, |
2505 | struct kvm_run *kvm_run) | |
2506 | { | |
85f455f7 ED |
2507 | u32 cpu_based_vm_exec_control; |
2508 | ||
2509 | /* clear pending irq */ | |
2510 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
2511 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
2512 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2714d1d3 FEL |
2513 | |
2514 | KVMTRACE_0D(PEND_INTR, vcpu, handler); | |
2515 | ||
c1150d8c DL |
2516 | /* |
2517 | * If the user space waits to inject interrupts, exit as soon as | |
2518 | * possible | |
2519 | */ | |
2520 | if (kvm_run->request_interrupt_window && | |
ad312c7c | 2521 | !vcpu->arch.irq_summary) { |
c1150d8c | 2522 | kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
1165f5fe | 2523 | ++vcpu->stat.irq_window_exits; |
c1150d8c DL |
2524 | return 0; |
2525 | } | |
6aa8b732 AK |
2526 | return 1; |
2527 | } | |
2528 | ||
2529 | static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2530 | { | |
2531 | skip_emulated_instruction(vcpu); | |
d3bef15f | 2532 | return kvm_emulate_halt(vcpu); |
6aa8b732 AK |
2533 | } |
2534 | ||
c21415e8 IM |
2535 | static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2536 | { | |
510043da | 2537 | skip_emulated_instruction(vcpu); |
7aa81cc0 AL |
2538 | kvm_emulate_hypercall(vcpu); |
2539 | return 1; | |
c21415e8 IM |
2540 | } |
2541 | ||
e5edaa01 ED |
2542 | static int handle_wbinvd(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2543 | { | |
2544 | skip_emulated_instruction(vcpu); | |
2545 | /* TODO: Add support for VT-d/pass-through device */ | |
2546 | return 1; | |
2547 | } | |
2548 | ||
f78e0e2e SY |
2549 | static int handle_apic_access(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2550 | { | |
2551 | u64 exit_qualification; | |
2552 | enum emulation_result er; | |
2553 | unsigned long offset; | |
2554 | ||
2555 | exit_qualification = vmcs_read64(EXIT_QUALIFICATION); | |
2556 | offset = exit_qualification & 0xffful; | |
2557 | ||
2558 | er = emulate_instruction(vcpu, kvm_run, 0, 0, 0); | |
2559 | ||
2560 | if (er != EMULATE_DONE) { | |
2561 | printk(KERN_ERR | |
2562 | "Fail to handle apic access vmexit! Offset is 0x%lx\n", | |
2563 | offset); | |
2564 | return -ENOTSUPP; | |
2565 | } | |
2566 | return 1; | |
2567 | } | |
2568 | ||
37817f29 IE |
2569 | static int handle_task_switch(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2570 | { | |
2571 | unsigned long exit_qualification; | |
2572 | u16 tss_selector; | |
2573 | int reason; | |
2574 | ||
2575 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
2576 | ||
2577 | reason = (u32)exit_qualification >> 30; | |
2578 | tss_selector = exit_qualification; | |
2579 | ||
2580 | return kvm_task_switch(vcpu, tss_selector, reason); | |
2581 | } | |
2582 | ||
1439442c SY |
2583 | static int handle_ept_violation(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2584 | { | |
2585 | u64 exit_qualification; | |
2586 | enum emulation_result er; | |
2587 | gpa_t gpa; | |
2588 | unsigned long hva; | |
2589 | int gla_validity; | |
2590 | int r; | |
2591 | ||
2592 | exit_qualification = vmcs_read64(EXIT_QUALIFICATION); | |
2593 | ||
2594 | if (exit_qualification & (1 << 6)) { | |
2595 | printk(KERN_ERR "EPT: GPA exceeds GAW!\n"); | |
2596 | return -ENOTSUPP; | |
2597 | } | |
2598 | ||
2599 | gla_validity = (exit_qualification >> 7) & 0x3; | |
2600 | if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) { | |
2601 | printk(KERN_ERR "EPT: Handling EPT violation failed!\n"); | |
2602 | printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n", | |
2603 | (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS), | |
2604 | (long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS)); | |
2605 | printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n", | |
2606 | (long unsigned int)exit_qualification); | |
2607 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; | |
2608 | kvm_run->hw.hardware_exit_reason = 0; | |
2609 | return -ENOTSUPP; | |
2610 | } | |
2611 | ||
2612 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
2613 | hva = gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT); | |
2614 | if (!kvm_is_error_hva(hva)) { | |
2615 | r = kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, 0); | |
2616 | if (r < 0) { | |
2617 | printk(KERN_ERR "EPT: Not enough memory!\n"); | |
2618 | return -ENOMEM; | |
2619 | } | |
2620 | return 1; | |
2621 | } else { | |
2622 | /* must be MMIO */ | |
2623 | er = emulate_instruction(vcpu, kvm_run, 0, 0, 0); | |
2624 | ||
2625 | if (er == EMULATE_FAIL) { | |
2626 | printk(KERN_ERR | |
2627 | "EPT: Fail to handle EPT violation vmexit!er is %d\n", | |
2628 | er); | |
2629 | printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n", | |
2630 | (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS), | |
2631 | (long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS)); | |
2632 | printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n", | |
2633 | (long unsigned int)exit_qualification); | |
2634 | return -ENOTSUPP; | |
2635 | } else if (er == EMULATE_DO_MMIO) | |
2636 | return 0; | |
2637 | } | |
2638 | return 1; | |
2639 | } | |
2640 | ||
6aa8b732 AK |
2641 | /* |
2642 | * The exit handlers return 1 if the exit was handled fully and guest execution | |
2643 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs | |
2644 | * to be done to userspace and return 0. | |
2645 | */ | |
2646 | static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu, | |
2647 | struct kvm_run *kvm_run) = { | |
2648 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, | |
2649 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, | |
988ad74f | 2650 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
6aa8b732 | 2651 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
6aa8b732 AK |
2652 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
2653 | [EXIT_REASON_DR_ACCESS] = handle_dr, | |
2654 | [EXIT_REASON_CPUID] = handle_cpuid, | |
2655 | [EXIT_REASON_MSR_READ] = handle_rdmsr, | |
2656 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, | |
2657 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, | |
2658 | [EXIT_REASON_HLT] = handle_halt, | |
c21415e8 | 2659 | [EXIT_REASON_VMCALL] = handle_vmcall, |
f78e0e2e SY |
2660 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
2661 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, | |
e5edaa01 | 2662 | [EXIT_REASON_WBINVD] = handle_wbinvd, |
37817f29 | 2663 | [EXIT_REASON_TASK_SWITCH] = handle_task_switch, |
1439442c | 2664 | [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation, |
6aa8b732 AK |
2665 | }; |
2666 | ||
2667 | static const int kvm_vmx_max_exit_handlers = | |
50a3485c | 2668 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
6aa8b732 AK |
2669 | |
2670 | /* | |
2671 | * The guest has exited. See if we can fix it or if we need userspace | |
2672 | * assistance. | |
2673 | */ | |
2674 | static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) | |
2675 | { | |
6aa8b732 | 2676 | u32 exit_reason = vmcs_read32(VM_EXIT_REASON); |
29bd8a78 | 2677 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
1155f76a | 2678 | u32 vectoring_info = vmx->idt_vectoring_info; |
29bd8a78 | 2679 | |
2714d1d3 FEL |
2680 | KVMTRACE_3D(VMEXIT, vcpu, exit_reason, (u32)vmcs_readl(GUEST_RIP), |
2681 | (u32)((u64)vmcs_readl(GUEST_RIP) >> 32), entryexit); | |
2682 | ||
1439442c SY |
2683 | /* Access CR3 don't cause VMExit in paging mode, so we need |
2684 | * to sync with guest real CR3. */ | |
2685 | if (vm_need_ept() && is_paging(vcpu)) { | |
2686 | vcpu->arch.cr3 = vmcs_readl(GUEST_CR3); | |
2687 | ept_load_pdptrs(vcpu); | |
2688 | } | |
2689 | ||
29bd8a78 AK |
2690 | if (unlikely(vmx->fail)) { |
2691 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
2692 | kvm_run->fail_entry.hardware_entry_failure_reason | |
2693 | = vmcs_read32(VM_INSTRUCTION_ERROR); | |
2694 | return 0; | |
2695 | } | |
6aa8b732 | 2696 | |
d77c26fc | 2697 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
1439442c SY |
2698 | (exit_reason != EXIT_REASON_EXCEPTION_NMI && |
2699 | exit_reason != EXIT_REASON_EPT_VIOLATION)) | |
6aa8b732 | 2700 | printk(KERN_WARNING "%s: unexpected, valid vectoring info and " |
b8688d51 | 2701 | "exit reason is 0x%x\n", __func__, exit_reason); |
6aa8b732 AK |
2702 | if (exit_reason < kvm_vmx_max_exit_handlers |
2703 | && kvm_vmx_exit_handlers[exit_reason]) | |
2704 | return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run); | |
2705 | else { | |
2706 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; | |
2707 | kvm_run->hw.hardware_exit_reason = exit_reason; | |
2708 | } | |
2709 | return 0; | |
2710 | } | |
2711 | ||
6e5d865c YS |
2712 | static void update_tpr_threshold(struct kvm_vcpu *vcpu) |
2713 | { | |
2714 | int max_irr, tpr; | |
2715 | ||
2716 | if (!vm_need_tpr_shadow(vcpu->kvm)) | |
2717 | return; | |
2718 | ||
2719 | if (!kvm_lapic_enabled(vcpu) || | |
2720 | ((max_irr = kvm_lapic_find_highest_irr(vcpu)) == -1)) { | |
2721 | vmcs_write32(TPR_THRESHOLD, 0); | |
2722 | return; | |
2723 | } | |
2724 | ||
2725 | tpr = (kvm_lapic_get_cr8(vcpu) & 0x0f) << 4; | |
2726 | vmcs_write32(TPR_THRESHOLD, (max_irr > tpr) ? tpr >> 4 : max_irr >> 4); | |
2727 | } | |
2728 | ||
85f455f7 ED |
2729 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
2730 | { | |
2731 | u32 cpu_based_vm_exec_control; | |
2732 | ||
2733 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
2734 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; | |
2735 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2736 | } | |
2737 | ||
2738 | static void vmx_intr_assist(struct kvm_vcpu *vcpu) | |
2739 | { | |
1155f76a | 2740 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
85f455f7 ED |
2741 | u32 idtv_info_field, intr_info_field; |
2742 | int has_ext_irq, interrupt_window_open; | |
1b9778da | 2743 | int vector; |
85f455f7 | 2744 | |
6e5d865c YS |
2745 | update_tpr_threshold(vcpu); |
2746 | ||
85f455f7 ED |
2747 | has_ext_irq = kvm_cpu_has_interrupt(vcpu); |
2748 | intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD); | |
1155f76a | 2749 | idtv_info_field = vmx->idt_vectoring_info; |
85f455f7 ED |
2750 | if (intr_info_field & INTR_INFO_VALID_MASK) { |
2751 | if (idtv_info_field & INTR_INFO_VALID_MASK) { | |
2752 | /* TODO: fault when IDT_Vectoring */ | |
9584bf2c RH |
2753 | if (printk_ratelimit()) |
2754 | printk(KERN_ERR "Fault when IDT_Vectoring\n"); | |
85f455f7 ED |
2755 | } |
2756 | if (has_ext_irq) | |
2757 | enable_irq_window(vcpu); | |
2758 | return; | |
2759 | } | |
2760 | if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) { | |
9c8cba37 AK |
2761 | if ((idtv_info_field & VECTORING_INFO_TYPE_MASK) |
2762 | == INTR_TYPE_EXT_INTR | |
ad312c7c | 2763 | && vcpu->arch.rmode.active) { |
9c8cba37 AK |
2764 | u8 vect = idtv_info_field & VECTORING_INFO_VECTOR_MASK; |
2765 | ||
2766 | vmx_inject_irq(vcpu, vect); | |
2767 | if (unlikely(has_ext_irq)) | |
2768 | enable_irq_window(vcpu); | |
2769 | return; | |
2770 | } | |
2771 | ||
2714d1d3 FEL |
2772 | KVMTRACE_1D(REDELIVER_EVT, vcpu, idtv_info_field, handler); |
2773 | ||
85f455f7 ED |
2774 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field); |
2775 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
2776 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN)); | |
2777 | ||
2e11384c | 2778 | if (unlikely(idtv_info_field & INTR_INFO_DELIVER_CODE_MASK)) |
85f455f7 ED |
2779 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, |
2780 | vmcs_read32(IDT_VECTORING_ERROR_CODE)); | |
2781 | if (unlikely(has_ext_irq)) | |
2782 | enable_irq_window(vcpu); | |
2783 | return; | |
2784 | } | |
2785 | if (!has_ext_irq) | |
2786 | return; | |
2787 | interrupt_window_open = | |
2788 | ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && | |
2789 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); | |
1b9778da ED |
2790 | if (interrupt_window_open) { |
2791 | vector = kvm_cpu_get_interrupt(vcpu); | |
2792 | vmx_inject_irq(vcpu, vector); | |
2793 | kvm_timer_intr_post(vcpu, vector); | |
2794 | } else | |
85f455f7 ED |
2795 | enable_irq_window(vcpu); |
2796 | } | |
2797 | ||
9c8cba37 AK |
2798 | /* |
2799 | * Failure to inject an interrupt should give us the information | |
2800 | * in IDT_VECTORING_INFO_FIELD. However, if the failure occurs | |
2801 | * when fetching the interrupt redirection bitmap in the real-mode | |
2802 | * tss, this doesn't happen. So we do it ourselves. | |
2803 | */ | |
2804 | static void fixup_rmode_irq(struct vcpu_vmx *vmx) | |
2805 | { | |
2806 | vmx->rmode.irq.pending = 0; | |
2807 | if (vmcs_readl(GUEST_RIP) + 1 != vmx->rmode.irq.rip) | |
2808 | return; | |
2809 | vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip); | |
2810 | if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) { | |
2811 | vmx->idt_vectoring_info &= ~VECTORING_INFO_TYPE_MASK; | |
2812 | vmx->idt_vectoring_info |= INTR_TYPE_EXT_INTR; | |
2813 | return; | |
2814 | } | |
2815 | vmx->idt_vectoring_info = | |
2816 | VECTORING_INFO_VALID_MASK | |
2817 | | INTR_TYPE_EXT_INTR | |
2818 | | vmx->rmode.irq.vector; | |
2819 | } | |
2820 | ||
04d2cc77 | 2821 | static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6aa8b732 | 2822 | { |
a2fa3e9f | 2823 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
1b6269db | 2824 | u32 intr_info; |
e6adf283 AK |
2825 | |
2826 | /* | |
2827 | * Loading guest fpu may have cleared host cr0.ts | |
2828 | */ | |
2829 | vmcs_writel(HOST_CR0, read_cr0()); | |
2830 | ||
d77c26fc | 2831 | asm( |
6aa8b732 | 2832 | /* Store host registers */ |
05b3e0c2 | 2833 | #ifdef CONFIG_X86_64 |
c2036300 | 2834 | "push %%rdx; push %%rbp;" |
6aa8b732 | 2835 | "push %%rcx \n\t" |
6aa8b732 | 2836 | #else |
ff593e5a LV |
2837 | "push %%edx; push %%ebp;" |
2838 | "push %%ecx \n\t" | |
6aa8b732 | 2839 | #endif |
4ecac3fd | 2840 | __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t" |
6aa8b732 | 2841 | /* Check if vmlaunch of vmresume is needed */ |
e08aa78a | 2842 | "cmpl $0, %c[launched](%0) \n\t" |
6aa8b732 | 2843 | /* Load guest registers. Don't clobber flags. */ |
05b3e0c2 | 2844 | #ifdef CONFIG_X86_64 |
e08aa78a | 2845 | "mov %c[cr2](%0), %%rax \n\t" |
6aa8b732 | 2846 | "mov %%rax, %%cr2 \n\t" |
e08aa78a AK |
2847 | "mov %c[rax](%0), %%rax \n\t" |
2848 | "mov %c[rbx](%0), %%rbx \n\t" | |
2849 | "mov %c[rdx](%0), %%rdx \n\t" | |
2850 | "mov %c[rsi](%0), %%rsi \n\t" | |
2851 | "mov %c[rdi](%0), %%rdi \n\t" | |
2852 | "mov %c[rbp](%0), %%rbp \n\t" | |
2853 | "mov %c[r8](%0), %%r8 \n\t" | |
2854 | "mov %c[r9](%0), %%r9 \n\t" | |
2855 | "mov %c[r10](%0), %%r10 \n\t" | |
2856 | "mov %c[r11](%0), %%r11 \n\t" | |
2857 | "mov %c[r12](%0), %%r12 \n\t" | |
2858 | "mov %c[r13](%0), %%r13 \n\t" | |
2859 | "mov %c[r14](%0), %%r14 \n\t" | |
2860 | "mov %c[r15](%0), %%r15 \n\t" | |
2861 | "mov %c[rcx](%0), %%rcx \n\t" /* kills %0 (rcx) */ | |
6aa8b732 | 2862 | #else |
e08aa78a | 2863 | "mov %c[cr2](%0), %%eax \n\t" |
6aa8b732 | 2864 | "mov %%eax, %%cr2 \n\t" |
e08aa78a AK |
2865 | "mov %c[rax](%0), %%eax \n\t" |
2866 | "mov %c[rbx](%0), %%ebx \n\t" | |
2867 | "mov %c[rdx](%0), %%edx \n\t" | |
2868 | "mov %c[rsi](%0), %%esi \n\t" | |
2869 | "mov %c[rdi](%0), %%edi \n\t" | |
2870 | "mov %c[rbp](%0), %%ebp \n\t" | |
2871 | "mov %c[rcx](%0), %%ecx \n\t" /* kills %0 (ecx) */ | |
6aa8b732 AK |
2872 | #endif |
2873 | /* Enter guest mode */ | |
cd2276a7 | 2874 | "jne .Llaunched \n\t" |
4ecac3fd | 2875 | __ex(ASM_VMX_VMLAUNCH) "\n\t" |
cd2276a7 | 2876 | "jmp .Lkvm_vmx_return \n\t" |
4ecac3fd | 2877 | ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t" |
cd2276a7 | 2878 | ".Lkvm_vmx_return: " |
6aa8b732 | 2879 | /* Save guest registers, load host registers, keep flags */ |
05b3e0c2 | 2880 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
2881 | "xchg %0, (%%rsp) \n\t" |
2882 | "mov %%rax, %c[rax](%0) \n\t" | |
2883 | "mov %%rbx, %c[rbx](%0) \n\t" | |
2884 | "pushq (%%rsp); popq %c[rcx](%0) \n\t" | |
2885 | "mov %%rdx, %c[rdx](%0) \n\t" | |
2886 | "mov %%rsi, %c[rsi](%0) \n\t" | |
2887 | "mov %%rdi, %c[rdi](%0) \n\t" | |
2888 | "mov %%rbp, %c[rbp](%0) \n\t" | |
2889 | "mov %%r8, %c[r8](%0) \n\t" | |
2890 | "mov %%r9, %c[r9](%0) \n\t" | |
2891 | "mov %%r10, %c[r10](%0) \n\t" | |
2892 | "mov %%r11, %c[r11](%0) \n\t" | |
2893 | "mov %%r12, %c[r12](%0) \n\t" | |
2894 | "mov %%r13, %c[r13](%0) \n\t" | |
2895 | "mov %%r14, %c[r14](%0) \n\t" | |
2896 | "mov %%r15, %c[r15](%0) \n\t" | |
6aa8b732 | 2897 | "mov %%cr2, %%rax \n\t" |
e08aa78a | 2898 | "mov %%rax, %c[cr2](%0) \n\t" |
6aa8b732 | 2899 | |
e08aa78a | 2900 | "pop %%rbp; pop %%rbp; pop %%rdx \n\t" |
6aa8b732 | 2901 | #else |
e08aa78a AK |
2902 | "xchg %0, (%%esp) \n\t" |
2903 | "mov %%eax, %c[rax](%0) \n\t" | |
2904 | "mov %%ebx, %c[rbx](%0) \n\t" | |
2905 | "pushl (%%esp); popl %c[rcx](%0) \n\t" | |
2906 | "mov %%edx, %c[rdx](%0) \n\t" | |
2907 | "mov %%esi, %c[rsi](%0) \n\t" | |
2908 | "mov %%edi, %c[rdi](%0) \n\t" | |
2909 | "mov %%ebp, %c[rbp](%0) \n\t" | |
6aa8b732 | 2910 | "mov %%cr2, %%eax \n\t" |
e08aa78a | 2911 | "mov %%eax, %c[cr2](%0) \n\t" |
6aa8b732 | 2912 | |
e08aa78a | 2913 | "pop %%ebp; pop %%ebp; pop %%edx \n\t" |
6aa8b732 | 2914 | #endif |
e08aa78a AK |
2915 | "setbe %c[fail](%0) \n\t" |
2916 | : : "c"(vmx), "d"((unsigned long)HOST_RSP), | |
2917 | [launched]"i"(offsetof(struct vcpu_vmx, launched)), | |
2918 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), | |
ad312c7c ZX |
2919 | [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])), |
2920 | [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])), | |
2921 | [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])), | |
2922 | [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])), | |
2923 | [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])), | |
2924 | [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])), | |
2925 | [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])), | |
05b3e0c2 | 2926 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
2927 | [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])), |
2928 | [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])), | |
2929 | [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])), | |
2930 | [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])), | |
2931 | [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])), | |
2932 | [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])), | |
2933 | [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), | |
2934 | [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), | |
6aa8b732 | 2935 | #endif |
ad312c7c | 2936 | [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)) |
c2036300 LV |
2937 | : "cc", "memory" |
2938 | #ifdef CONFIG_X86_64 | |
2939 | , "rbx", "rdi", "rsi" | |
2940 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" | |
ff593e5a LV |
2941 | #else |
2942 | , "ebx", "edi", "rsi" | |
c2036300 LV |
2943 | #endif |
2944 | ); | |
6aa8b732 | 2945 | |
1155f76a | 2946 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
9c8cba37 AK |
2947 | if (vmx->rmode.irq.pending) |
2948 | fixup_rmode_irq(vmx); | |
1155f76a | 2949 | |
ad312c7c | 2950 | vcpu->arch.interrupt_window_open = |
d77c26fc | 2951 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0; |
6aa8b732 | 2952 | |
d77c26fc | 2953 | asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); |
15ad7146 | 2954 | vmx->launched = 1; |
1b6269db AK |
2955 | |
2956 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
2957 | ||
2958 | /* We need to handle NMIs before interrupts are enabled */ | |
2714d1d3 FEL |
2959 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) { /* nmi */ |
2960 | KVMTRACE_0D(NMI, vcpu, handler); | |
1b6269db | 2961 | asm("int $2"); |
2714d1d3 | 2962 | } |
6aa8b732 AK |
2963 | } |
2964 | ||
6aa8b732 AK |
2965 | static void vmx_free_vmcs(struct kvm_vcpu *vcpu) |
2966 | { | |
a2fa3e9f GH |
2967 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2968 | ||
2969 | if (vmx->vmcs) { | |
15c8b6c1 | 2970 | on_each_cpu(__vcpu_clear, vmx, 1); |
a2fa3e9f GH |
2971 | free_vmcs(vmx->vmcs); |
2972 | vmx->vmcs = NULL; | |
6aa8b732 AK |
2973 | } |
2974 | } | |
2975 | ||
2976 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) | |
2977 | { | |
fb3f0f51 RR |
2978 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2979 | ||
2384d2b3 SY |
2980 | spin_lock(&vmx_vpid_lock); |
2981 | if (vmx->vpid != 0) | |
2982 | __clear_bit(vmx->vpid, vmx_vpid_bitmap); | |
2983 | spin_unlock(&vmx_vpid_lock); | |
6aa8b732 | 2984 | vmx_free_vmcs(vcpu); |
fb3f0f51 RR |
2985 | kfree(vmx->host_msrs); |
2986 | kfree(vmx->guest_msrs); | |
2987 | kvm_vcpu_uninit(vcpu); | |
a4770347 | 2988 | kmem_cache_free(kvm_vcpu_cache, vmx); |
6aa8b732 AK |
2989 | } |
2990 | ||
fb3f0f51 | 2991 | static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 2992 | { |
fb3f0f51 | 2993 | int err; |
c16f862d | 2994 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
15ad7146 | 2995 | int cpu; |
6aa8b732 | 2996 | |
a2fa3e9f | 2997 | if (!vmx) |
fb3f0f51 RR |
2998 | return ERR_PTR(-ENOMEM); |
2999 | ||
2384d2b3 | 3000 | allocate_vpid(vmx); |
1439442c SY |
3001 | if (id == 0 && vm_need_ept()) { |
3002 | kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK | | |
3003 | VMX_EPT_WRITABLE_MASK | | |
3004 | VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT); | |
3005 | kvm_mmu_set_mask_ptes(0ull, VMX_EPT_FAKE_ACCESSED_MASK, | |
3006 | VMX_EPT_FAKE_DIRTY_MASK, 0ull, | |
3007 | VMX_EPT_EXECUTABLE_MASK); | |
3008 | kvm_enable_tdp(); | |
3009 | } | |
2384d2b3 | 3010 | |
fb3f0f51 RR |
3011 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
3012 | if (err) | |
3013 | goto free_vcpu; | |
965b58a5 | 3014 | |
a2fa3e9f | 3015 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
fb3f0f51 RR |
3016 | if (!vmx->guest_msrs) { |
3017 | err = -ENOMEM; | |
3018 | goto uninit_vcpu; | |
3019 | } | |
965b58a5 | 3020 | |
a2fa3e9f GH |
3021 | vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
3022 | if (!vmx->host_msrs) | |
fb3f0f51 | 3023 | goto free_guest_msrs; |
965b58a5 | 3024 | |
a2fa3e9f GH |
3025 | vmx->vmcs = alloc_vmcs(); |
3026 | if (!vmx->vmcs) | |
fb3f0f51 | 3027 | goto free_msrs; |
a2fa3e9f GH |
3028 | |
3029 | vmcs_clear(vmx->vmcs); | |
3030 | ||
15ad7146 AK |
3031 | cpu = get_cpu(); |
3032 | vmx_vcpu_load(&vmx->vcpu, cpu); | |
8b9cf98c | 3033 | err = vmx_vcpu_setup(vmx); |
fb3f0f51 | 3034 | vmx_vcpu_put(&vmx->vcpu); |
15ad7146 | 3035 | put_cpu(); |
fb3f0f51 RR |
3036 | if (err) |
3037 | goto free_vmcs; | |
5e4a0b3c MT |
3038 | if (vm_need_virtualize_apic_accesses(kvm)) |
3039 | if (alloc_apic_access_page(kvm) != 0) | |
3040 | goto free_vmcs; | |
fb3f0f51 | 3041 | |
b7ebfb05 SY |
3042 | if (vm_need_ept()) |
3043 | if (alloc_identity_pagetable(kvm) != 0) | |
3044 | goto free_vmcs; | |
3045 | ||
fb3f0f51 RR |
3046 | return &vmx->vcpu; |
3047 | ||
3048 | free_vmcs: | |
3049 | free_vmcs(vmx->vmcs); | |
3050 | free_msrs: | |
3051 | kfree(vmx->host_msrs); | |
3052 | free_guest_msrs: | |
3053 | kfree(vmx->guest_msrs); | |
3054 | uninit_vcpu: | |
3055 | kvm_vcpu_uninit(&vmx->vcpu); | |
3056 | free_vcpu: | |
a4770347 | 3057 | kmem_cache_free(kvm_vcpu_cache, vmx); |
fb3f0f51 | 3058 | return ERR_PTR(err); |
6aa8b732 AK |
3059 | } |
3060 | ||
002c7f7c YS |
3061 | static void __init vmx_check_processor_compat(void *rtn) |
3062 | { | |
3063 | struct vmcs_config vmcs_conf; | |
3064 | ||
3065 | *(int *)rtn = 0; | |
3066 | if (setup_vmcs_config(&vmcs_conf) < 0) | |
3067 | *(int *)rtn = -EIO; | |
3068 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { | |
3069 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", | |
3070 | smp_processor_id()); | |
3071 | *(int *)rtn = -EIO; | |
3072 | } | |
3073 | } | |
3074 | ||
67253af5 SY |
3075 | static int get_ept_level(void) |
3076 | { | |
3077 | return VMX_EPT_DEFAULT_GAW + 1; | |
3078 | } | |
3079 | ||
cbdd1bea | 3080 | static struct kvm_x86_ops vmx_x86_ops = { |
6aa8b732 AK |
3081 | .cpu_has_kvm_support = cpu_has_kvm_support, |
3082 | .disabled_by_bios = vmx_disabled_by_bios, | |
3083 | .hardware_setup = hardware_setup, | |
3084 | .hardware_unsetup = hardware_unsetup, | |
002c7f7c | 3085 | .check_processor_compatibility = vmx_check_processor_compat, |
6aa8b732 AK |
3086 | .hardware_enable = hardware_enable, |
3087 | .hardware_disable = hardware_disable, | |
774ead3a | 3088 | .cpu_has_accelerated_tpr = cpu_has_vmx_virtualize_apic_accesses, |
6aa8b732 AK |
3089 | |
3090 | .vcpu_create = vmx_create_vcpu, | |
3091 | .vcpu_free = vmx_free_vcpu, | |
04d2cc77 | 3092 | .vcpu_reset = vmx_vcpu_reset, |
6aa8b732 | 3093 | |
04d2cc77 | 3094 | .prepare_guest_switch = vmx_save_host_state, |
6aa8b732 AK |
3095 | .vcpu_load = vmx_vcpu_load, |
3096 | .vcpu_put = vmx_vcpu_put, | |
774c47f1 | 3097 | .vcpu_decache = vmx_vcpu_decache, |
6aa8b732 AK |
3098 | |
3099 | .set_guest_debug = set_guest_debug, | |
04d2cc77 | 3100 | .guest_debug_pre = kvm_guest_debug_pre, |
6aa8b732 AK |
3101 | .get_msr = vmx_get_msr, |
3102 | .set_msr = vmx_set_msr, | |
3103 | .get_segment_base = vmx_get_segment_base, | |
3104 | .get_segment = vmx_get_segment, | |
3105 | .set_segment = vmx_set_segment, | |
2e4d2653 | 3106 | .get_cpl = vmx_get_cpl, |
6aa8b732 | 3107 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
25c4c276 | 3108 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
6aa8b732 | 3109 | .set_cr0 = vmx_set_cr0, |
6aa8b732 AK |
3110 | .set_cr3 = vmx_set_cr3, |
3111 | .set_cr4 = vmx_set_cr4, | |
6aa8b732 | 3112 | .set_efer = vmx_set_efer, |
6aa8b732 AK |
3113 | .get_idt = vmx_get_idt, |
3114 | .set_idt = vmx_set_idt, | |
3115 | .get_gdt = vmx_get_gdt, | |
3116 | .set_gdt = vmx_set_gdt, | |
3117 | .cache_regs = vcpu_load_rsp_rip, | |
3118 | .decache_regs = vcpu_put_rsp_rip, | |
3119 | .get_rflags = vmx_get_rflags, | |
3120 | .set_rflags = vmx_set_rflags, | |
3121 | ||
3122 | .tlb_flush = vmx_flush_tlb, | |
6aa8b732 | 3123 | |
6aa8b732 | 3124 | .run = vmx_vcpu_run, |
04d2cc77 | 3125 | .handle_exit = kvm_handle_exit, |
6aa8b732 | 3126 | .skip_emulated_instruction = skip_emulated_instruction, |
102d8325 | 3127 | .patch_hypercall = vmx_patch_hypercall, |
2a8067f1 ED |
3128 | .get_irq = vmx_get_irq, |
3129 | .set_irq = vmx_inject_irq, | |
298101da AK |
3130 | .queue_exception = vmx_queue_exception, |
3131 | .exception_injected = vmx_exception_injected, | |
04d2cc77 AK |
3132 | .inject_pending_irq = vmx_intr_assist, |
3133 | .inject_pending_vectors = do_interrupt_requests, | |
cbc94022 IE |
3134 | |
3135 | .set_tss_addr = vmx_set_tss_addr, | |
67253af5 | 3136 | .get_tdp_level = get_ept_level, |
6aa8b732 AK |
3137 | }; |
3138 | ||
3139 | static int __init vmx_init(void) | |
3140 | { | |
25c5f225 | 3141 | void *va; |
fdef3ad1 HQ |
3142 | int r; |
3143 | ||
3144 | vmx_io_bitmap_a = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); | |
3145 | if (!vmx_io_bitmap_a) | |
3146 | return -ENOMEM; | |
3147 | ||
3148 | vmx_io_bitmap_b = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); | |
3149 | if (!vmx_io_bitmap_b) { | |
3150 | r = -ENOMEM; | |
3151 | goto out; | |
3152 | } | |
3153 | ||
25c5f225 SY |
3154 | vmx_msr_bitmap = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); |
3155 | if (!vmx_msr_bitmap) { | |
3156 | r = -ENOMEM; | |
3157 | goto out1; | |
3158 | } | |
3159 | ||
fdef3ad1 HQ |
3160 | /* |
3161 | * Allow direct access to the PC debug port (it is often used for I/O | |
3162 | * delays, but the vmexits simply slow things down). | |
3163 | */ | |
25c5f225 SY |
3164 | va = kmap(vmx_io_bitmap_a); |
3165 | memset(va, 0xff, PAGE_SIZE); | |
3166 | clear_bit(0x80, va); | |
cd0536d7 | 3167 | kunmap(vmx_io_bitmap_a); |
fdef3ad1 | 3168 | |
25c5f225 SY |
3169 | va = kmap(vmx_io_bitmap_b); |
3170 | memset(va, 0xff, PAGE_SIZE); | |
cd0536d7 | 3171 | kunmap(vmx_io_bitmap_b); |
fdef3ad1 | 3172 | |
25c5f225 SY |
3173 | va = kmap(vmx_msr_bitmap); |
3174 | memset(va, 0xff, PAGE_SIZE); | |
3175 | kunmap(vmx_msr_bitmap); | |
3176 | ||
2384d2b3 SY |
3177 | set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */ |
3178 | ||
cb498ea2 | 3179 | r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE); |
fdef3ad1 | 3180 | if (r) |
25c5f225 SY |
3181 | goto out2; |
3182 | ||
3183 | vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_FS_BASE); | |
3184 | vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_GS_BASE); | |
3185 | vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_CS); | |
3186 | vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_ESP); | |
3187 | vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_EIP); | |
fdef3ad1 | 3188 | |
1439442c SY |
3189 | if (cpu_has_vmx_ept()) |
3190 | bypass_guest_pf = 0; | |
3191 | ||
c7addb90 AK |
3192 | if (bypass_guest_pf) |
3193 | kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull); | |
3194 | ||
1439442c SY |
3195 | ept_sync_global(); |
3196 | ||
fdef3ad1 HQ |
3197 | return 0; |
3198 | ||
25c5f225 SY |
3199 | out2: |
3200 | __free_page(vmx_msr_bitmap); | |
fdef3ad1 HQ |
3201 | out1: |
3202 | __free_page(vmx_io_bitmap_b); | |
3203 | out: | |
3204 | __free_page(vmx_io_bitmap_a); | |
3205 | return r; | |
6aa8b732 AK |
3206 | } |
3207 | ||
3208 | static void __exit vmx_exit(void) | |
3209 | { | |
25c5f225 | 3210 | __free_page(vmx_msr_bitmap); |
fdef3ad1 HQ |
3211 | __free_page(vmx_io_bitmap_b); |
3212 | __free_page(vmx_io_bitmap_a); | |
3213 | ||
cb498ea2 | 3214 | kvm_exit(); |
6aa8b732 AK |
3215 | } |
3216 | ||
3217 | module_init(vmx_init) | |
3218 | module_exit(vmx_exit) |