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 | |
6aa8b732 AK |
33 | MODULE_AUTHOR("Qumranet"); |
34 | MODULE_LICENSE("GPL"); | |
35 | ||
c7addb90 AK |
36 | static int bypass_guest_pf = 1; |
37 | module_param(bypass_guest_pf, bool, 0); | |
38 | ||
2384d2b3 SY |
39 | static int enable_vpid = 1; |
40 | module_param(enable_vpid, bool, 0); | |
41 | ||
4c9fc8ef AK |
42 | static int flexpriority_enabled = 1; |
43 | module_param(flexpriority_enabled, bool, 0); | |
44 | ||
a2fa3e9f GH |
45 | struct vmcs { |
46 | u32 revision_id; | |
47 | u32 abort; | |
48 | char data[0]; | |
49 | }; | |
50 | ||
51 | struct vcpu_vmx { | |
fb3f0f51 | 52 | struct kvm_vcpu vcpu; |
a2fa3e9f | 53 | int launched; |
29bd8a78 | 54 | u8 fail; |
1155f76a | 55 | u32 idt_vectoring_info; |
a2fa3e9f GH |
56 | struct kvm_msr_entry *guest_msrs; |
57 | struct kvm_msr_entry *host_msrs; | |
58 | int nmsrs; | |
59 | int save_nmsrs; | |
60 | int msr_offset_efer; | |
61 | #ifdef CONFIG_X86_64 | |
62 | int msr_offset_kernel_gs_base; | |
63 | #endif | |
64 | struct vmcs *vmcs; | |
65 | struct { | |
66 | int loaded; | |
67 | u16 fs_sel, gs_sel, ldt_sel; | |
152d3f2f LV |
68 | int gs_ldt_reload_needed; |
69 | int fs_reload_needed; | |
51c6cf66 | 70 | int guest_efer_loaded; |
d77c26fc | 71 | } host_state; |
9c8cba37 AK |
72 | struct { |
73 | struct { | |
74 | bool pending; | |
75 | u8 vector; | |
76 | unsigned rip; | |
77 | } irq; | |
78 | } rmode; | |
2384d2b3 | 79 | int vpid; |
a2fa3e9f GH |
80 | }; |
81 | ||
82 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) | |
83 | { | |
fb3f0f51 | 84 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
a2fa3e9f GH |
85 | } |
86 | ||
75880a01 AK |
87 | static int init_rmode_tss(struct kvm *kvm); |
88 | ||
6aa8b732 AK |
89 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
90 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); | |
91 | ||
fdef3ad1 HQ |
92 | static struct page *vmx_io_bitmap_a; |
93 | static struct page *vmx_io_bitmap_b; | |
94 | ||
2384d2b3 SY |
95 | static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS); |
96 | static DEFINE_SPINLOCK(vmx_vpid_lock); | |
97 | ||
1c3d14fe | 98 | static struct vmcs_config { |
6aa8b732 AK |
99 | int size; |
100 | int order; | |
101 | u32 revision_id; | |
1c3d14fe YS |
102 | u32 pin_based_exec_ctrl; |
103 | u32 cpu_based_exec_ctrl; | |
f78e0e2e | 104 | u32 cpu_based_2nd_exec_ctrl; |
1c3d14fe YS |
105 | u32 vmexit_ctrl; |
106 | u32 vmentry_ctrl; | |
107 | } vmcs_config; | |
6aa8b732 AK |
108 | |
109 | #define VMX_SEGMENT_FIELD(seg) \ | |
110 | [VCPU_SREG_##seg] = { \ | |
111 | .selector = GUEST_##seg##_SELECTOR, \ | |
112 | .base = GUEST_##seg##_BASE, \ | |
113 | .limit = GUEST_##seg##_LIMIT, \ | |
114 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ | |
115 | } | |
116 | ||
117 | static struct kvm_vmx_segment_field { | |
118 | unsigned selector; | |
119 | unsigned base; | |
120 | unsigned limit; | |
121 | unsigned ar_bytes; | |
122 | } kvm_vmx_segment_fields[] = { | |
123 | VMX_SEGMENT_FIELD(CS), | |
124 | VMX_SEGMENT_FIELD(DS), | |
125 | VMX_SEGMENT_FIELD(ES), | |
126 | VMX_SEGMENT_FIELD(FS), | |
127 | VMX_SEGMENT_FIELD(GS), | |
128 | VMX_SEGMENT_FIELD(SS), | |
129 | VMX_SEGMENT_FIELD(TR), | |
130 | VMX_SEGMENT_FIELD(LDTR), | |
131 | }; | |
132 | ||
4d56c8a7 AK |
133 | /* |
134 | * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it | |
135 | * away by decrementing the array size. | |
136 | */ | |
6aa8b732 | 137 | static const u32 vmx_msr_index[] = { |
05b3e0c2 | 138 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
139 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE, |
140 | #endif | |
141 | MSR_EFER, MSR_K6_STAR, | |
142 | }; | |
9d8f549d | 143 | #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) |
6aa8b732 | 144 | |
a2fa3e9f GH |
145 | static void load_msrs(struct kvm_msr_entry *e, int n) |
146 | { | |
147 | int i; | |
148 | ||
149 | for (i = 0; i < n; ++i) | |
150 | wrmsrl(e[i].index, e[i].data); | |
151 | } | |
152 | ||
153 | static void save_msrs(struct kvm_msr_entry *e, int n) | |
154 | { | |
155 | int i; | |
156 | ||
157 | for (i = 0; i < n; ++i) | |
158 | rdmsrl(e[i].index, e[i].data); | |
159 | } | |
160 | ||
6aa8b732 AK |
161 | static inline int is_page_fault(u32 intr_info) |
162 | { | |
163 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
164 | INTR_INFO_VALID_MASK)) == | |
165 | (INTR_TYPE_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); | |
166 | } | |
167 | ||
2ab455cc AL |
168 | static inline int is_no_device(u32 intr_info) |
169 | { | |
170 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
171 | INTR_INFO_VALID_MASK)) == | |
172 | (INTR_TYPE_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); | |
173 | } | |
174 | ||
7aa81cc0 AL |
175 | static inline int is_invalid_opcode(u32 intr_info) |
176 | { | |
177 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
178 | INTR_INFO_VALID_MASK)) == | |
179 | (INTR_TYPE_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); | |
180 | } | |
181 | ||
6aa8b732 AK |
182 | static inline int is_external_interrupt(u32 intr_info) |
183 | { | |
184 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
185 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); | |
186 | } | |
187 | ||
6e5d865c YS |
188 | static inline int cpu_has_vmx_tpr_shadow(void) |
189 | { | |
190 | return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW); | |
191 | } | |
192 | ||
193 | static inline int vm_need_tpr_shadow(struct kvm *kvm) | |
194 | { | |
195 | return ((cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm))); | |
196 | } | |
197 | ||
f78e0e2e SY |
198 | static inline int cpu_has_secondary_exec_ctrls(void) |
199 | { | |
200 | return (vmcs_config.cpu_based_exec_ctrl & | |
201 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS); | |
202 | } | |
203 | ||
774ead3a | 204 | static inline bool cpu_has_vmx_virtualize_apic_accesses(void) |
f78e0e2e | 205 | { |
4c9fc8ef AK |
206 | return flexpriority_enabled |
207 | && (vmcs_config.cpu_based_2nd_exec_ctrl & | |
208 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES); | |
f78e0e2e SY |
209 | } |
210 | ||
211 | static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm) | |
212 | { | |
213 | return ((cpu_has_vmx_virtualize_apic_accesses()) && | |
214 | (irqchip_in_kernel(kvm))); | |
215 | } | |
216 | ||
2384d2b3 SY |
217 | static inline int cpu_has_vmx_vpid(void) |
218 | { | |
219 | return (vmcs_config.cpu_based_2nd_exec_ctrl & | |
220 | SECONDARY_EXEC_ENABLE_VPID); | |
221 | } | |
222 | ||
8b9cf98c | 223 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
7725f0ba AK |
224 | { |
225 | int i; | |
226 | ||
a2fa3e9f GH |
227 | for (i = 0; i < vmx->nmsrs; ++i) |
228 | if (vmx->guest_msrs[i].index == msr) | |
a75beee6 ED |
229 | return i; |
230 | return -1; | |
231 | } | |
232 | ||
2384d2b3 SY |
233 | static inline void __invvpid(int ext, u16 vpid, gva_t gva) |
234 | { | |
235 | struct { | |
236 | u64 vpid : 16; | |
237 | u64 rsvd : 48; | |
238 | u64 gva; | |
239 | } operand = { vpid, 0, gva }; | |
240 | ||
241 | asm volatile (ASM_VMX_INVVPID | |
242 | /* CF==1 or ZF==1 --> rc = -1 */ | |
243 | "; ja 1f ; ud2 ; 1:" | |
244 | : : "a"(&operand), "c"(ext) : "cc", "memory"); | |
245 | } | |
246 | ||
8b9cf98c | 247 | static struct kvm_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr) |
a75beee6 ED |
248 | { |
249 | int i; | |
250 | ||
8b9cf98c | 251 | i = __find_msr_index(vmx, msr); |
a75beee6 | 252 | if (i >= 0) |
a2fa3e9f | 253 | return &vmx->guest_msrs[i]; |
8b6d44c7 | 254 | return NULL; |
7725f0ba AK |
255 | } |
256 | ||
6aa8b732 AK |
257 | static void vmcs_clear(struct vmcs *vmcs) |
258 | { | |
259 | u64 phys_addr = __pa(vmcs); | |
260 | u8 error; | |
261 | ||
262 | asm volatile (ASM_VMX_VMCLEAR_RAX "; setna %0" | |
263 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) | |
264 | : "cc", "memory"); | |
265 | if (error) | |
266 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", | |
267 | vmcs, phys_addr); | |
268 | } | |
269 | ||
270 | static void __vcpu_clear(void *arg) | |
271 | { | |
8b9cf98c | 272 | struct vcpu_vmx *vmx = arg; |
d3b2c338 | 273 | int cpu = raw_smp_processor_id(); |
6aa8b732 | 274 | |
8b9cf98c | 275 | if (vmx->vcpu.cpu == cpu) |
a2fa3e9f GH |
276 | vmcs_clear(vmx->vmcs); |
277 | if (per_cpu(current_vmcs, cpu) == vmx->vmcs) | |
6aa8b732 | 278 | per_cpu(current_vmcs, cpu) = NULL; |
ad312c7c | 279 | rdtscll(vmx->vcpu.arch.host_tsc); |
6aa8b732 AK |
280 | } |
281 | ||
8b9cf98c | 282 | static void vcpu_clear(struct vcpu_vmx *vmx) |
8d0be2b3 | 283 | { |
eae5ecb5 AK |
284 | if (vmx->vcpu.cpu == -1) |
285 | return; | |
f566e09f | 286 | smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 0, 1); |
8b9cf98c | 287 | vmx->launched = 0; |
8d0be2b3 AK |
288 | } |
289 | ||
2384d2b3 SY |
290 | static inline void vpid_sync_vcpu_all(struct vcpu_vmx *vmx) |
291 | { | |
292 | if (vmx->vpid == 0) | |
293 | return; | |
294 | ||
295 | __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0); | |
296 | } | |
297 | ||
6aa8b732 AK |
298 | static unsigned long vmcs_readl(unsigned long field) |
299 | { | |
300 | unsigned long value; | |
301 | ||
302 | asm volatile (ASM_VMX_VMREAD_RDX_RAX | |
303 | : "=a"(value) : "d"(field) : "cc"); | |
304 | return value; | |
305 | } | |
306 | ||
307 | static u16 vmcs_read16(unsigned long field) | |
308 | { | |
309 | return vmcs_readl(field); | |
310 | } | |
311 | ||
312 | static u32 vmcs_read32(unsigned long field) | |
313 | { | |
314 | return vmcs_readl(field); | |
315 | } | |
316 | ||
317 | static u64 vmcs_read64(unsigned long field) | |
318 | { | |
05b3e0c2 | 319 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
320 | return vmcs_readl(field); |
321 | #else | |
322 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); | |
323 | #endif | |
324 | } | |
325 | ||
e52de1b8 AK |
326 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
327 | { | |
328 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", | |
329 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); | |
330 | dump_stack(); | |
331 | } | |
332 | ||
6aa8b732 AK |
333 | static void vmcs_writel(unsigned long field, unsigned long value) |
334 | { | |
335 | u8 error; | |
336 | ||
337 | asm volatile (ASM_VMX_VMWRITE_RAX_RDX "; setna %0" | |
d77c26fc | 338 | : "=q"(error) : "a"(value), "d"(field) : "cc"); |
e52de1b8 AK |
339 | if (unlikely(error)) |
340 | vmwrite_error(field, value); | |
6aa8b732 AK |
341 | } |
342 | ||
343 | static void vmcs_write16(unsigned long field, u16 value) | |
344 | { | |
345 | vmcs_writel(field, value); | |
346 | } | |
347 | ||
348 | static void vmcs_write32(unsigned long field, u32 value) | |
349 | { | |
350 | vmcs_writel(field, value); | |
351 | } | |
352 | ||
353 | static void vmcs_write64(unsigned long field, u64 value) | |
354 | { | |
05b3e0c2 | 355 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
356 | vmcs_writel(field, value); |
357 | #else | |
358 | vmcs_writel(field, value); | |
359 | asm volatile (""); | |
360 | vmcs_writel(field+1, value >> 32); | |
361 | #endif | |
362 | } | |
363 | ||
2ab455cc AL |
364 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
365 | { | |
366 | vmcs_writel(field, vmcs_readl(field) & ~mask); | |
367 | } | |
368 | ||
369 | static void vmcs_set_bits(unsigned long field, u32 mask) | |
370 | { | |
371 | vmcs_writel(field, vmcs_readl(field) | mask); | |
372 | } | |
373 | ||
abd3f2d6 AK |
374 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
375 | { | |
376 | u32 eb; | |
377 | ||
7aa81cc0 | 378 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR); |
abd3f2d6 AK |
379 | if (!vcpu->fpu_active) |
380 | eb |= 1u << NM_VECTOR; | |
381 | if (vcpu->guest_debug.enabled) | |
382 | eb |= 1u << 1; | |
ad312c7c | 383 | if (vcpu->arch.rmode.active) |
abd3f2d6 AK |
384 | eb = ~0; |
385 | vmcs_write32(EXCEPTION_BITMAP, eb); | |
386 | } | |
387 | ||
33ed6329 AK |
388 | static void reload_tss(void) |
389 | { | |
33ed6329 AK |
390 | /* |
391 | * VT restores TR but not its size. Useless. | |
392 | */ | |
393 | struct descriptor_table gdt; | |
a5f61300 | 394 | struct desc_struct *descs; |
33ed6329 AK |
395 | |
396 | get_gdt(&gdt); | |
397 | descs = (void *)gdt.base; | |
398 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ | |
399 | load_TR_desc(); | |
33ed6329 AK |
400 | } |
401 | ||
8b9cf98c | 402 | static void load_transition_efer(struct vcpu_vmx *vmx) |
2cc51560 | 403 | { |
a2fa3e9f | 404 | int efer_offset = vmx->msr_offset_efer; |
51c6cf66 AK |
405 | u64 host_efer = vmx->host_msrs[efer_offset].data; |
406 | u64 guest_efer = vmx->guest_msrs[efer_offset].data; | |
407 | u64 ignore_bits; | |
408 | ||
409 | if (efer_offset < 0) | |
410 | return; | |
411 | /* | |
412 | * NX is emulated; LMA and LME handled by hardware; SCE meaninless | |
413 | * outside long mode | |
414 | */ | |
415 | ignore_bits = EFER_NX | EFER_SCE; | |
416 | #ifdef CONFIG_X86_64 | |
417 | ignore_bits |= EFER_LMA | EFER_LME; | |
418 | /* SCE is meaningful only in long mode on Intel */ | |
419 | if (guest_efer & EFER_LMA) | |
420 | ignore_bits &= ~(u64)EFER_SCE; | |
421 | #endif | |
422 | if ((guest_efer & ~ignore_bits) == (host_efer & ~ignore_bits)) | |
423 | return; | |
2cc51560 | 424 | |
51c6cf66 AK |
425 | vmx->host_state.guest_efer_loaded = 1; |
426 | guest_efer &= ~ignore_bits; | |
427 | guest_efer |= host_efer & ignore_bits; | |
428 | wrmsrl(MSR_EFER, guest_efer); | |
8b9cf98c | 429 | vmx->vcpu.stat.efer_reload++; |
2cc51560 ED |
430 | } |
431 | ||
51c6cf66 AK |
432 | static void reload_host_efer(struct vcpu_vmx *vmx) |
433 | { | |
434 | if (vmx->host_state.guest_efer_loaded) { | |
435 | vmx->host_state.guest_efer_loaded = 0; | |
436 | load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1); | |
437 | } | |
438 | } | |
439 | ||
04d2cc77 | 440 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
33ed6329 | 441 | { |
04d2cc77 AK |
442 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
443 | ||
a2fa3e9f | 444 | if (vmx->host_state.loaded) |
33ed6329 AK |
445 | return; |
446 | ||
a2fa3e9f | 447 | vmx->host_state.loaded = 1; |
33ed6329 AK |
448 | /* |
449 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not | |
450 | * allow segment selectors with cpl > 0 or ti == 1. | |
451 | */ | |
a2fa3e9f | 452 | vmx->host_state.ldt_sel = read_ldt(); |
152d3f2f | 453 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
a2fa3e9f | 454 | vmx->host_state.fs_sel = read_fs(); |
152d3f2f | 455 | if (!(vmx->host_state.fs_sel & 7)) { |
a2fa3e9f | 456 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
152d3f2f LV |
457 | vmx->host_state.fs_reload_needed = 0; |
458 | } else { | |
33ed6329 | 459 | vmcs_write16(HOST_FS_SELECTOR, 0); |
152d3f2f | 460 | vmx->host_state.fs_reload_needed = 1; |
33ed6329 | 461 | } |
a2fa3e9f GH |
462 | vmx->host_state.gs_sel = read_gs(); |
463 | if (!(vmx->host_state.gs_sel & 7)) | |
464 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); | |
33ed6329 AK |
465 | else { |
466 | vmcs_write16(HOST_GS_SELECTOR, 0); | |
152d3f2f | 467 | vmx->host_state.gs_ldt_reload_needed = 1; |
33ed6329 AK |
468 | } |
469 | ||
470 | #ifdef CONFIG_X86_64 | |
471 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); | |
472 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); | |
473 | #else | |
a2fa3e9f GH |
474 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
475 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); | |
33ed6329 | 476 | #endif |
707c0874 AK |
477 | |
478 | #ifdef CONFIG_X86_64 | |
d77c26fc | 479 | if (is_long_mode(&vmx->vcpu)) |
a2fa3e9f GH |
480 | save_msrs(vmx->host_msrs + |
481 | vmx->msr_offset_kernel_gs_base, 1); | |
d77c26fc | 482 | |
707c0874 | 483 | #endif |
a2fa3e9f | 484 | load_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
51c6cf66 | 485 | load_transition_efer(vmx); |
33ed6329 AK |
486 | } |
487 | ||
8b9cf98c | 488 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
33ed6329 | 489 | { |
15ad7146 | 490 | unsigned long flags; |
33ed6329 | 491 | |
a2fa3e9f | 492 | if (!vmx->host_state.loaded) |
33ed6329 AK |
493 | return; |
494 | ||
e1beb1d3 | 495 | ++vmx->vcpu.stat.host_state_reload; |
a2fa3e9f | 496 | vmx->host_state.loaded = 0; |
152d3f2f | 497 | if (vmx->host_state.fs_reload_needed) |
a2fa3e9f | 498 | load_fs(vmx->host_state.fs_sel); |
152d3f2f LV |
499 | if (vmx->host_state.gs_ldt_reload_needed) { |
500 | load_ldt(vmx->host_state.ldt_sel); | |
33ed6329 AK |
501 | /* |
502 | * If we have to reload gs, we must take care to | |
503 | * preserve our gs base. | |
504 | */ | |
15ad7146 | 505 | local_irq_save(flags); |
a2fa3e9f | 506 | load_gs(vmx->host_state.gs_sel); |
33ed6329 AK |
507 | #ifdef CONFIG_X86_64 |
508 | wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE)); | |
509 | #endif | |
15ad7146 | 510 | local_irq_restore(flags); |
33ed6329 | 511 | } |
152d3f2f | 512 | reload_tss(); |
a2fa3e9f GH |
513 | save_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
514 | load_msrs(vmx->host_msrs, vmx->save_nmsrs); | |
51c6cf66 | 515 | reload_host_efer(vmx); |
33ed6329 AK |
516 | } |
517 | ||
6aa8b732 AK |
518 | /* |
519 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes | |
520 | * vcpu mutex is already taken. | |
521 | */ | |
15ad7146 | 522 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 523 | { |
a2fa3e9f GH |
524 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
525 | u64 phys_addr = __pa(vmx->vmcs); | |
019960ae | 526 | u64 tsc_this, delta, new_offset; |
6aa8b732 | 527 | |
a3d7f85f | 528 | if (vcpu->cpu != cpu) { |
8b9cf98c | 529 | vcpu_clear(vmx); |
a3d7f85f | 530 | kvm_migrate_apic_timer(vcpu); |
2384d2b3 | 531 | vpid_sync_vcpu_all(vmx); |
a3d7f85f | 532 | } |
6aa8b732 | 533 | |
a2fa3e9f | 534 | if (per_cpu(current_vmcs, cpu) != vmx->vmcs) { |
6aa8b732 AK |
535 | u8 error; |
536 | ||
a2fa3e9f | 537 | per_cpu(current_vmcs, cpu) = vmx->vmcs; |
6aa8b732 AK |
538 | asm volatile (ASM_VMX_VMPTRLD_RAX "; setna %0" |
539 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) | |
540 | : "cc"); | |
541 | if (error) | |
542 | printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n", | |
a2fa3e9f | 543 | vmx->vmcs, phys_addr); |
6aa8b732 AK |
544 | } |
545 | ||
546 | if (vcpu->cpu != cpu) { | |
547 | struct descriptor_table dt; | |
548 | unsigned long sysenter_esp; | |
549 | ||
550 | vcpu->cpu = cpu; | |
551 | /* | |
552 | * Linux uses per-cpu TSS and GDT, so set these when switching | |
553 | * processors. | |
554 | */ | |
555 | vmcs_writel(HOST_TR_BASE, read_tr_base()); /* 22.2.4 */ | |
556 | get_gdt(&dt); | |
557 | vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */ | |
558 | ||
559 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); | |
560 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ | |
7700270e AK |
561 | |
562 | /* | |
563 | * Make sure the time stamp counter is monotonous. | |
564 | */ | |
565 | rdtscll(tsc_this); | |
019960ae AK |
566 | if (tsc_this < vcpu->arch.host_tsc) { |
567 | delta = vcpu->arch.host_tsc - tsc_this; | |
568 | new_offset = vmcs_read64(TSC_OFFSET) + delta; | |
569 | vmcs_write64(TSC_OFFSET, new_offset); | |
570 | } | |
6aa8b732 | 571 | } |
6aa8b732 AK |
572 | } |
573 | ||
574 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) | |
575 | { | |
8b9cf98c | 576 | vmx_load_host_state(to_vmx(vcpu)); |
6aa8b732 AK |
577 | } |
578 | ||
5fd86fcf AK |
579 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
580 | { | |
581 | if (vcpu->fpu_active) | |
582 | return; | |
583 | vcpu->fpu_active = 1; | |
707d92fa | 584 | vmcs_clear_bits(GUEST_CR0, X86_CR0_TS); |
ad312c7c | 585 | if (vcpu->arch.cr0 & X86_CR0_TS) |
707d92fa | 586 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
5fd86fcf AK |
587 | update_exception_bitmap(vcpu); |
588 | } | |
589 | ||
590 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) | |
591 | { | |
592 | if (!vcpu->fpu_active) | |
593 | return; | |
594 | vcpu->fpu_active = 0; | |
707d92fa | 595 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
5fd86fcf AK |
596 | update_exception_bitmap(vcpu); |
597 | } | |
598 | ||
774c47f1 AK |
599 | static void vmx_vcpu_decache(struct kvm_vcpu *vcpu) |
600 | { | |
8b9cf98c | 601 | vcpu_clear(to_vmx(vcpu)); |
774c47f1 AK |
602 | } |
603 | ||
6aa8b732 AK |
604 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
605 | { | |
606 | return vmcs_readl(GUEST_RFLAGS); | |
607 | } | |
608 | ||
609 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
610 | { | |
ad312c7c | 611 | if (vcpu->arch.rmode.active) |
053de044 | 612 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
613 | vmcs_writel(GUEST_RFLAGS, rflags); |
614 | } | |
615 | ||
616 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) | |
617 | { | |
618 | unsigned long rip; | |
619 | u32 interruptibility; | |
620 | ||
621 | rip = vmcs_readl(GUEST_RIP); | |
622 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
623 | vmcs_writel(GUEST_RIP, rip); | |
624 | ||
625 | /* | |
626 | * We emulated an instruction, so temporary interrupt blocking | |
627 | * should be removed, if set. | |
628 | */ | |
629 | interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
630 | if (interruptibility & 3) | |
631 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, | |
632 | interruptibility & ~3); | |
ad312c7c | 633 | vcpu->arch.interrupt_window_open = 1; |
6aa8b732 AK |
634 | } |
635 | ||
298101da AK |
636 | static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
637 | bool has_error_code, u32 error_code) | |
638 | { | |
639 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, | |
640 | nr | INTR_TYPE_EXCEPTION | |
2e11384c | 641 | | (has_error_code ? INTR_INFO_DELIVER_CODE_MASK : 0) |
298101da AK |
642 | | INTR_INFO_VALID_MASK); |
643 | if (has_error_code) | |
644 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); | |
645 | } | |
646 | ||
647 | static bool vmx_exception_injected(struct kvm_vcpu *vcpu) | |
648 | { | |
649 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
650 | ||
651 | return !(vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK); | |
652 | } | |
653 | ||
a75beee6 ED |
654 | /* |
655 | * Swap MSR entry in host/guest MSR entry array. | |
656 | */ | |
54e11fa1 | 657 | #ifdef CONFIG_X86_64 |
8b9cf98c | 658 | static void move_msr_up(struct vcpu_vmx *vmx, int from, int to) |
a75beee6 | 659 | { |
a2fa3e9f GH |
660 | struct kvm_msr_entry tmp; |
661 | ||
662 | tmp = vmx->guest_msrs[to]; | |
663 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; | |
664 | vmx->guest_msrs[from] = tmp; | |
665 | tmp = vmx->host_msrs[to]; | |
666 | vmx->host_msrs[to] = vmx->host_msrs[from]; | |
667 | vmx->host_msrs[from] = tmp; | |
a75beee6 | 668 | } |
54e11fa1 | 669 | #endif |
a75beee6 | 670 | |
e38aea3e AK |
671 | /* |
672 | * Set up the vmcs to automatically save and restore system | |
673 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy | |
674 | * mode, as fiddling with msrs is very expensive. | |
675 | */ | |
8b9cf98c | 676 | static void setup_msrs(struct vcpu_vmx *vmx) |
e38aea3e | 677 | { |
2cc51560 | 678 | int save_nmsrs; |
e38aea3e | 679 | |
33f9c505 | 680 | vmx_load_host_state(vmx); |
a75beee6 ED |
681 | save_nmsrs = 0; |
682 | #ifdef CONFIG_X86_64 | |
8b9cf98c | 683 | if (is_long_mode(&vmx->vcpu)) { |
2cc51560 ED |
684 | int index; |
685 | ||
8b9cf98c | 686 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
a75beee6 | 687 | if (index >= 0) |
8b9cf98c RR |
688 | move_msr_up(vmx, index, save_nmsrs++); |
689 | index = __find_msr_index(vmx, MSR_LSTAR); | |
a75beee6 | 690 | if (index >= 0) |
8b9cf98c RR |
691 | move_msr_up(vmx, index, save_nmsrs++); |
692 | index = __find_msr_index(vmx, MSR_CSTAR); | |
a75beee6 | 693 | if (index >= 0) |
8b9cf98c RR |
694 | move_msr_up(vmx, index, save_nmsrs++); |
695 | index = __find_msr_index(vmx, MSR_KERNEL_GS_BASE); | |
a75beee6 | 696 | if (index >= 0) |
8b9cf98c | 697 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
698 | /* |
699 | * MSR_K6_STAR is only needed on long mode guests, and only | |
700 | * if efer.sce is enabled. | |
701 | */ | |
8b9cf98c | 702 | index = __find_msr_index(vmx, MSR_K6_STAR); |
ad312c7c | 703 | if ((index >= 0) && (vmx->vcpu.arch.shadow_efer & EFER_SCE)) |
8b9cf98c | 704 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
705 | } |
706 | #endif | |
a2fa3e9f | 707 | vmx->save_nmsrs = save_nmsrs; |
e38aea3e | 708 | |
4d56c8a7 | 709 | #ifdef CONFIG_X86_64 |
a2fa3e9f | 710 | vmx->msr_offset_kernel_gs_base = |
8b9cf98c | 711 | __find_msr_index(vmx, MSR_KERNEL_GS_BASE); |
4d56c8a7 | 712 | #endif |
8b9cf98c | 713 | vmx->msr_offset_efer = __find_msr_index(vmx, MSR_EFER); |
e38aea3e AK |
714 | } |
715 | ||
6aa8b732 AK |
716 | /* |
717 | * reads and returns guest's timestamp counter "register" | |
718 | * guest_tsc = host_tsc + tsc_offset -- 21.3 | |
719 | */ | |
720 | static u64 guest_read_tsc(void) | |
721 | { | |
722 | u64 host_tsc, tsc_offset; | |
723 | ||
724 | rdtscll(host_tsc); | |
725 | tsc_offset = vmcs_read64(TSC_OFFSET); | |
726 | return host_tsc + tsc_offset; | |
727 | } | |
728 | ||
729 | /* | |
730 | * writes 'guest_tsc' into guest's timestamp counter "register" | |
731 | * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc | |
732 | */ | |
733 | static void guest_write_tsc(u64 guest_tsc) | |
734 | { | |
735 | u64 host_tsc; | |
736 | ||
737 | rdtscll(host_tsc); | |
738 | vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc); | |
739 | } | |
740 | ||
6aa8b732 AK |
741 | /* |
742 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
743 | * Returns 0 on success, non-0 otherwise. | |
744 | * Assumes vcpu_load() was already called. | |
745 | */ | |
746 | static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
747 | { | |
748 | u64 data; | |
a2fa3e9f | 749 | struct kvm_msr_entry *msr; |
6aa8b732 AK |
750 | |
751 | if (!pdata) { | |
752 | printk(KERN_ERR "BUG: get_msr called with NULL pdata\n"); | |
753 | return -EINVAL; | |
754 | } | |
755 | ||
756 | switch (msr_index) { | |
05b3e0c2 | 757 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
758 | case MSR_FS_BASE: |
759 | data = vmcs_readl(GUEST_FS_BASE); | |
760 | break; | |
761 | case MSR_GS_BASE: | |
762 | data = vmcs_readl(GUEST_GS_BASE); | |
763 | break; | |
764 | case MSR_EFER: | |
3bab1f5d | 765 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
6aa8b732 AK |
766 | #endif |
767 | case MSR_IA32_TIME_STAMP_COUNTER: | |
768 | data = guest_read_tsc(); | |
769 | break; | |
770 | case MSR_IA32_SYSENTER_CS: | |
771 | data = vmcs_read32(GUEST_SYSENTER_CS); | |
772 | break; | |
773 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 774 | data = vmcs_readl(GUEST_SYSENTER_EIP); |
6aa8b732 AK |
775 | break; |
776 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 777 | data = vmcs_readl(GUEST_SYSENTER_ESP); |
6aa8b732 | 778 | break; |
6aa8b732 | 779 | default: |
8b9cf98c | 780 | msr = find_msr_entry(to_vmx(vcpu), msr_index); |
3bab1f5d AK |
781 | if (msr) { |
782 | data = msr->data; | |
783 | break; | |
6aa8b732 | 784 | } |
3bab1f5d | 785 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
6aa8b732 AK |
786 | } |
787 | ||
788 | *pdata = data; | |
789 | return 0; | |
790 | } | |
791 | ||
792 | /* | |
793 | * Writes msr value into into the appropriate "register". | |
794 | * Returns 0 on success, non-0 otherwise. | |
795 | * Assumes vcpu_load() was already called. | |
796 | */ | |
797 | static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
798 | { | |
a2fa3e9f GH |
799 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
800 | struct kvm_msr_entry *msr; | |
2cc51560 ED |
801 | int ret = 0; |
802 | ||
6aa8b732 | 803 | switch (msr_index) { |
05b3e0c2 | 804 | #ifdef CONFIG_X86_64 |
3bab1f5d | 805 | case MSR_EFER: |
2cc51560 | 806 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
51c6cf66 AK |
807 | if (vmx->host_state.loaded) { |
808 | reload_host_efer(vmx); | |
8b9cf98c | 809 | load_transition_efer(vmx); |
51c6cf66 | 810 | } |
2cc51560 | 811 | break; |
6aa8b732 AK |
812 | case MSR_FS_BASE: |
813 | vmcs_writel(GUEST_FS_BASE, data); | |
814 | break; | |
815 | case MSR_GS_BASE: | |
816 | vmcs_writel(GUEST_GS_BASE, data); | |
817 | break; | |
818 | #endif | |
819 | case MSR_IA32_SYSENTER_CS: | |
820 | vmcs_write32(GUEST_SYSENTER_CS, data); | |
821 | break; | |
822 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 823 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
6aa8b732 AK |
824 | break; |
825 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 826 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
6aa8b732 | 827 | break; |
d27d4aca | 828 | case MSR_IA32_TIME_STAMP_COUNTER: |
6aa8b732 AK |
829 | guest_write_tsc(data); |
830 | break; | |
6aa8b732 | 831 | default: |
8b9cf98c | 832 | msr = find_msr_entry(vmx, msr_index); |
3bab1f5d AK |
833 | if (msr) { |
834 | msr->data = data; | |
a2fa3e9f GH |
835 | if (vmx->host_state.loaded) |
836 | load_msrs(vmx->guest_msrs, vmx->save_nmsrs); | |
3bab1f5d | 837 | break; |
6aa8b732 | 838 | } |
2cc51560 | 839 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
6aa8b732 AK |
840 | } |
841 | ||
2cc51560 | 842 | return ret; |
6aa8b732 AK |
843 | } |
844 | ||
845 | /* | |
846 | * Sync the rsp and rip registers into the vcpu structure. This allows | |
ad312c7c | 847 | * registers to be accessed by indexing vcpu->arch.regs. |
6aa8b732 AK |
848 | */ |
849 | static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu) | |
850 | { | |
ad312c7c ZX |
851 | vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); |
852 | vcpu->arch.rip = vmcs_readl(GUEST_RIP); | |
6aa8b732 AK |
853 | } |
854 | ||
855 | /* | |
856 | * Syncs rsp and rip back into the vmcs. Should be called after possible | |
857 | * modification. | |
858 | */ | |
859 | static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu) | |
860 | { | |
ad312c7c ZX |
861 | vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]); |
862 | vmcs_writel(GUEST_RIP, vcpu->arch.rip); | |
6aa8b732 AK |
863 | } |
864 | ||
865 | static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg) | |
866 | { | |
867 | unsigned long dr7 = 0x400; | |
6aa8b732 AK |
868 | int old_singlestep; |
869 | ||
6aa8b732 AK |
870 | old_singlestep = vcpu->guest_debug.singlestep; |
871 | ||
872 | vcpu->guest_debug.enabled = dbg->enabled; | |
873 | if (vcpu->guest_debug.enabled) { | |
874 | int i; | |
875 | ||
876 | dr7 |= 0x200; /* exact */ | |
877 | for (i = 0; i < 4; ++i) { | |
878 | if (!dbg->breakpoints[i].enabled) | |
879 | continue; | |
880 | vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address; | |
881 | dr7 |= 2 << (i*2); /* global enable */ | |
882 | dr7 |= 0 << (i*4+16); /* execution breakpoint */ | |
883 | } | |
884 | ||
6aa8b732 | 885 | vcpu->guest_debug.singlestep = dbg->singlestep; |
abd3f2d6 | 886 | } else |
6aa8b732 | 887 | vcpu->guest_debug.singlestep = 0; |
6aa8b732 AK |
888 | |
889 | if (old_singlestep && !vcpu->guest_debug.singlestep) { | |
890 | unsigned long flags; | |
891 | ||
892 | flags = vmcs_readl(GUEST_RFLAGS); | |
893 | flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
894 | vmcs_writel(GUEST_RFLAGS, flags); | |
895 | } | |
896 | ||
abd3f2d6 | 897 | update_exception_bitmap(vcpu); |
6aa8b732 AK |
898 | vmcs_writel(GUEST_DR7, dr7); |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
2a8067f1 ED |
903 | static int vmx_get_irq(struct kvm_vcpu *vcpu) |
904 | { | |
1155f76a | 905 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2a8067f1 ED |
906 | u32 idtv_info_field; |
907 | ||
1155f76a | 908 | idtv_info_field = vmx->idt_vectoring_info; |
2a8067f1 ED |
909 | if (idtv_info_field & INTR_INFO_VALID_MASK) { |
910 | if (is_external_interrupt(idtv_info_field)) | |
911 | return idtv_info_field & VECTORING_INFO_VECTOR_MASK; | |
912 | else | |
d77c26fc | 913 | printk(KERN_DEBUG "pending exception: not handled yet\n"); |
2a8067f1 ED |
914 | } |
915 | return -1; | |
916 | } | |
917 | ||
6aa8b732 AK |
918 | static __init int cpu_has_kvm_support(void) |
919 | { | |
920 | unsigned long ecx = cpuid_ecx(1); | |
921 | return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */ | |
922 | } | |
923 | ||
924 | static __init int vmx_disabled_by_bios(void) | |
925 | { | |
926 | u64 msr; | |
927 | ||
928 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); | |
62b3ffb8 YS |
929 | return (msr & (MSR_IA32_FEATURE_CONTROL_LOCKED | |
930 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) | |
931 | == MSR_IA32_FEATURE_CONTROL_LOCKED; | |
932 | /* locked but not enabled */ | |
6aa8b732 AK |
933 | } |
934 | ||
774c47f1 | 935 | static void hardware_enable(void *garbage) |
6aa8b732 AK |
936 | { |
937 | int cpu = raw_smp_processor_id(); | |
938 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); | |
939 | u64 old; | |
940 | ||
941 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); | |
62b3ffb8 YS |
942 | if ((old & (MSR_IA32_FEATURE_CONTROL_LOCKED | |
943 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) | |
944 | != (MSR_IA32_FEATURE_CONTROL_LOCKED | | |
945 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) | |
6aa8b732 | 946 | /* enable and lock */ |
62b3ffb8 YS |
947 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | |
948 | MSR_IA32_FEATURE_CONTROL_LOCKED | | |
949 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED); | |
66aee91a | 950 | write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ |
6aa8b732 AK |
951 | asm volatile (ASM_VMX_VMXON_RAX : : "a"(&phys_addr), "m"(phys_addr) |
952 | : "memory", "cc"); | |
953 | } | |
954 | ||
955 | static void hardware_disable(void *garbage) | |
956 | { | |
957 | asm volatile (ASM_VMX_VMXOFF : : : "cc"); | |
958 | } | |
959 | ||
1c3d14fe | 960 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
d77c26fc | 961 | u32 msr, u32 *result) |
1c3d14fe YS |
962 | { |
963 | u32 vmx_msr_low, vmx_msr_high; | |
964 | u32 ctl = ctl_min | ctl_opt; | |
965 | ||
966 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
967 | ||
968 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ | |
969 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ | |
970 | ||
971 | /* Ensure minimum (required) set of control bits are supported. */ | |
972 | if (ctl_min & ~ctl) | |
002c7f7c | 973 | return -EIO; |
1c3d14fe YS |
974 | |
975 | *result = ctl; | |
976 | return 0; | |
977 | } | |
978 | ||
002c7f7c | 979 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
6aa8b732 AK |
980 | { |
981 | u32 vmx_msr_low, vmx_msr_high; | |
1c3d14fe YS |
982 | u32 min, opt; |
983 | u32 _pin_based_exec_control = 0; | |
984 | u32 _cpu_based_exec_control = 0; | |
f78e0e2e | 985 | u32 _cpu_based_2nd_exec_control = 0; |
1c3d14fe YS |
986 | u32 _vmexit_control = 0; |
987 | u32 _vmentry_control = 0; | |
988 | ||
989 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; | |
990 | opt = 0; | |
991 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, | |
992 | &_pin_based_exec_control) < 0) | |
002c7f7c | 993 | return -EIO; |
1c3d14fe YS |
994 | |
995 | min = CPU_BASED_HLT_EXITING | | |
996 | #ifdef CONFIG_X86_64 | |
997 | CPU_BASED_CR8_LOAD_EXITING | | |
998 | CPU_BASED_CR8_STORE_EXITING | | |
999 | #endif | |
1000 | CPU_BASED_USE_IO_BITMAPS | | |
1001 | CPU_BASED_MOV_DR_EXITING | | |
1002 | CPU_BASED_USE_TSC_OFFSETING; | |
f78e0e2e SY |
1003 | opt = CPU_BASED_TPR_SHADOW | |
1004 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; | |
1c3d14fe YS |
1005 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
1006 | &_cpu_based_exec_control) < 0) | |
002c7f7c | 1007 | return -EIO; |
6e5d865c YS |
1008 | #ifdef CONFIG_X86_64 |
1009 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
1010 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & | |
1011 | ~CPU_BASED_CR8_STORE_EXITING; | |
1012 | #endif | |
f78e0e2e SY |
1013 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
1014 | min = 0; | |
e5edaa01 | 1015 | opt = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | |
2384d2b3 SY |
1016 | SECONDARY_EXEC_WBINVD_EXITING | |
1017 | SECONDARY_EXEC_ENABLE_VPID; | |
f78e0e2e SY |
1018 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS2, |
1019 | &_cpu_based_2nd_exec_control) < 0) | |
1020 | return -EIO; | |
1021 | } | |
1022 | #ifndef CONFIG_X86_64 | |
1023 | if (!(_cpu_based_2nd_exec_control & | |
1024 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
1025 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; | |
1026 | #endif | |
1c3d14fe YS |
1027 | |
1028 | min = 0; | |
1029 | #ifdef CONFIG_X86_64 | |
1030 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; | |
1031 | #endif | |
1032 | opt = 0; | |
1033 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, | |
1034 | &_vmexit_control) < 0) | |
002c7f7c | 1035 | return -EIO; |
1c3d14fe YS |
1036 | |
1037 | min = opt = 0; | |
1038 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, | |
1039 | &_vmentry_control) < 0) | |
002c7f7c | 1040 | return -EIO; |
6aa8b732 | 1041 | |
c68876fd | 1042 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
1c3d14fe YS |
1043 | |
1044 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ | |
1045 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) | |
002c7f7c | 1046 | return -EIO; |
1c3d14fe YS |
1047 | |
1048 | #ifdef CONFIG_X86_64 | |
1049 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ | |
1050 | if (vmx_msr_high & (1u<<16)) | |
002c7f7c | 1051 | return -EIO; |
1c3d14fe YS |
1052 | #endif |
1053 | ||
1054 | /* Require Write-Back (WB) memory type for VMCS accesses. */ | |
1055 | if (((vmx_msr_high >> 18) & 15) != 6) | |
002c7f7c | 1056 | return -EIO; |
1c3d14fe | 1057 | |
002c7f7c YS |
1058 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
1059 | vmcs_conf->order = get_order(vmcs_config.size); | |
1060 | vmcs_conf->revision_id = vmx_msr_low; | |
1c3d14fe | 1061 | |
002c7f7c YS |
1062 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
1063 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; | |
f78e0e2e | 1064 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
002c7f7c YS |
1065 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
1066 | vmcs_conf->vmentry_ctrl = _vmentry_control; | |
1c3d14fe YS |
1067 | |
1068 | return 0; | |
c68876fd | 1069 | } |
6aa8b732 AK |
1070 | |
1071 | static struct vmcs *alloc_vmcs_cpu(int cpu) | |
1072 | { | |
1073 | int node = cpu_to_node(cpu); | |
1074 | struct page *pages; | |
1075 | struct vmcs *vmcs; | |
1076 | ||
1c3d14fe | 1077 | pages = alloc_pages_node(node, GFP_KERNEL, vmcs_config.order); |
6aa8b732 AK |
1078 | if (!pages) |
1079 | return NULL; | |
1080 | vmcs = page_address(pages); | |
1c3d14fe YS |
1081 | memset(vmcs, 0, vmcs_config.size); |
1082 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ | |
6aa8b732 AK |
1083 | return vmcs; |
1084 | } | |
1085 | ||
1086 | static struct vmcs *alloc_vmcs(void) | |
1087 | { | |
d3b2c338 | 1088 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
6aa8b732 AK |
1089 | } |
1090 | ||
1091 | static void free_vmcs(struct vmcs *vmcs) | |
1092 | { | |
1c3d14fe | 1093 | free_pages((unsigned long)vmcs, vmcs_config.order); |
6aa8b732 AK |
1094 | } |
1095 | ||
39959588 | 1096 | static void free_kvm_area(void) |
6aa8b732 AK |
1097 | { |
1098 | int cpu; | |
1099 | ||
1100 | for_each_online_cpu(cpu) | |
1101 | free_vmcs(per_cpu(vmxarea, cpu)); | |
1102 | } | |
1103 | ||
6aa8b732 AK |
1104 | static __init int alloc_kvm_area(void) |
1105 | { | |
1106 | int cpu; | |
1107 | ||
1108 | for_each_online_cpu(cpu) { | |
1109 | struct vmcs *vmcs; | |
1110 | ||
1111 | vmcs = alloc_vmcs_cpu(cpu); | |
1112 | if (!vmcs) { | |
1113 | free_kvm_area(); | |
1114 | return -ENOMEM; | |
1115 | } | |
1116 | ||
1117 | per_cpu(vmxarea, cpu) = vmcs; | |
1118 | } | |
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | static __init int hardware_setup(void) | |
1123 | { | |
002c7f7c YS |
1124 | if (setup_vmcs_config(&vmcs_config) < 0) |
1125 | return -EIO; | |
50a37eb4 JR |
1126 | |
1127 | if (boot_cpu_has(X86_FEATURE_NX)) | |
1128 | kvm_enable_efer_bits(EFER_NX); | |
1129 | ||
6aa8b732 AK |
1130 | return alloc_kvm_area(); |
1131 | } | |
1132 | ||
1133 | static __exit void hardware_unsetup(void) | |
1134 | { | |
1135 | free_kvm_area(); | |
1136 | } | |
1137 | ||
6aa8b732 AK |
1138 | static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save) |
1139 | { | |
1140 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1141 | ||
6af11b9e | 1142 | if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) { |
6aa8b732 AK |
1143 | vmcs_write16(sf->selector, save->selector); |
1144 | vmcs_writel(sf->base, save->base); | |
1145 | vmcs_write32(sf->limit, save->limit); | |
1146 | vmcs_write32(sf->ar_bytes, save->ar); | |
1147 | } else { | |
1148 | u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK) | |
1149 | << AR_DPL_SHIFT; | |
1150 | vmcs_write32(sf->ar_bytes, 0x93 | dpl); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | static void enter_pmode(struct kvm_vcpu *vcpu) | |
1155 | { | |
1156 | unsigned long flags; | |
1157 | ||
ad312c7c | 1158 | vcpu->arch.rmode.active = 0; |
6aa8b732 | 1159 | |
ad312c7c ZX |
1160 | vmcs_writel(GUEST_TR_BASE, vcpu->arch.rmode.tr.base); |
1161 | vmcs_write32(GUEST_TR_LIMIT, vcpu->arch.rmode.tr.limit); | |
1162 | vmcs_write32(GUEST_TR_AR_BYTES, vcpu->arch.rmode.tr.ar); | |
6aa8b732 AK |
1163 | |
1164 | flags = vmcs_readl(GUEST_RFLAGS); | |
053de044 | 1165 | flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM); |
ad312c7c | 1166 | flags |= (vcpu->arch.rmode.save_iopl << IOPL_SHIFT); |
6aa8b732 AK |
1167 | vmcs_writel(GUEST_RFLAGS, flags); |
1168 | ||
66aee91a RR |
1169 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
1170 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); | |
6aa8b732 AK |
1171 | |
1172 | update_exception_bitmap(vcpu); | |
1173 | ||
ad312c7c ZX |
1174 | fix_pmode_dataseg(VCPU_SREG_ES, &vcpu->arch.rmode.es); |
1175 | fix_pmode_dataseg(VCPU_SREG_DS, &vcpu->arch.rmode.ds); | |
1176 | fix_pmode_dataseg(VCPU_SREG_GS, &vcpu->arch.rmode.gs); | |
1177 | fix_pmode_dataseg(VCPU_SREG_FS, &vcpu->arch.rmode.fs); | |
6aa8b732 AK |
1178 | |
1179 | vmcs_write16(GUEST_SS_SELECTOR, 0); | |
1180 | vmcs_write32(GUEST_SS_AR_BYTES, 0x93); | |
1181 | ||
1182 | vmcs_write16(GUEST_CS_SELECTOR, | |
1183 | vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK); | |
1184 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); | |
1185 | } | |
1186 | ||
d77c26fc | 1187 | static gva_t rmode_tss_base(struct kvm *kvm) |
6aa8b732 | 1188 | { |
bfc6d222 | 1189 | if (!kvm->arch.tss_addr) { |
cbc94022 IE |
1190 | gfn_t base_gfn = kvm->memslots[0].base_gfn + |
1191 | kvm->memslots[0].npages - 3; | |
1192 | return base_gfn << PAGE_SHIFT; | |
1193 | } | |
bfc6d222 | 1194 | return kvm->arch.tss_addr; |
6aa8b732 AK |
1195 | } |
1196 | ||
1197 | static void fix_rmode_seg(int seg, struct kvm_save_segment *save) | |
1198 | { | |
1199 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1200 | ||
1201 | save->selector = vmcs_read16(sf->selector); | |
1202 | save->base = vmcs_readl(sf->base); | |
1203 | save->limit = vmcs_read32(sf->limit); | |
1204 | save->ar = vmcs_read32(sf->ar_bytes); | |
15b00f32 JK |
1205 | vmcs_write16(sf->selector, save->base >> 4); |
1206 | vmcs_write32(sf->base, save->base & 0xfffff); | |
6aa8b732 AK |
1207 | vmcs_write32(sf->limit, 0xffff); |
1208 | vmcs_write32(sf->ar_bytes, 0xf3); | |
1209 | } | |
1210 | ||
1211 | static void enter_rmode(struct kvm_vcpu *vcpu) | |
1212 | { | |
1213 | unsigned long flags; | |
1214 | ||
ad312c7c | 1215 | vcpu->arch.rmode.active = 1; |
6aa8b732 | 1216 | |
ad312c7c | 1217 | vcpu->arch.rmode.tr.base = vmcs_readl(GUEST_TR_BASE); |
6aa8b732 AK |
1218 | vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); |
1219 | ||
ad312c7c | 1220 | vcpu->arch.rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT); |
6aa8b732 AK |
1221 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
1222 | ||
ad312c7c | 1223 | vcpu->arch.rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES); |
6aa8b732 AK |
1224 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
1225 | ||
1226 | flags = vmcs_readl(GUEST_RFLAGS); | |
ad312c7c ZX |
1227 | vcpu->arch.rmode.save_iopl |
1228 | = (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT; | |
6aa8b732 | 1229 | |
053de044 | 1230 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
1231 | |
1232 | vmcs_writel(GUEST_RFLAGS, flags); | |
66aee91a | 1233 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
6aa8b732 AK |
1234 | update_exception_bitmap(vcpu); |
1235 | ||
1236 | vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4); | |
1237 | vmcs_write32(GUEST_SS_LIMIT, 0xffff); | |
1238 | vmcs_write32(GUEST_SS_AR_BYTES, 0xf3); | |
1239 | ||
1240 | vmcs_write32(GUEST_CS_AR_BYTES, 0xf3); | |
abacf8df | 1241 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
8cb5b033 AK |
1242 | if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000) |
1243 | vmcs_writel(GUEST_CS_BASE, 0xf0000); | |
6aa8b732 AK |
1244 | vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4); |
1245 | ||
ad312c7c ZX |
1246 | fix_rmode_seg(VCPU_SREG_ES, &vcpu->arch.rmode.es); |
1247 | fix_rmode_seg(VCPU_SREG_DS, &vcpu->arch.rmode.ds); | |
1248 | fix_rmode_seg(VCPU_SREG_GS, &vcpu->arch.rmode.gs); | |
1249 | fix_rmode_seg(VCPU_SREG_FS, &vcpu->arch.rmode.fs); | |
75880a01 | 1250 | |
8668a3c4 | 1251 | kvm_mmu_reset_context(vcpu); |
75880a01 | 1252 | init_rmode_tss(vcpu->kvm); |
6aa8b732 AK |
1253 | } |
1254 | ||
05b3e0c2 | 1255 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1256 | |
1257 | static void enter_lmode(struct kvm_vcpu *vcpu) | |
1258 | { | |
1259 | u32 guest_tr_ar; | |
1260 | ||
1261 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); | |
1262 | if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) { | |
1263 | printk(KERN_DEBUG "%s: tss fixup for long mode. \n", | |
b8688d51 | 1264 | __func__); |
6aa8b732 AK |
1265 | vmcs_write32(GUEST_TR_AR_BYTES, |
1266 | (guest_tr_ar & ~AR_TYPE_MASK) | |
1267 | | AR_TYPE_BUSY_64_TSS); | |
1268 | } | |
1269 | ||
ad312c7c | 1270 | vcpu->arch.shadow_efer |= EFER_LMA; |
6aa8b732 | 1271 | |
8b9cf98c | 1272 | find_msr_entry(to_vmx(vcpu), MSR_EFER)->data |= EFER_LMA | EFER_LME; |
6aa8b732 AK |
1273 | vmcs_write32(VM_ENTRY_CONTROLS, |
1274 | vmcs_read32(VM_ENTRY_CONTROLS) | |
1e4e6e00 | 1275 | | VM_ENTRY_IA32E_MODE); |
6aa8b732 AK |
1276 | } |
1277 | ||
1278 | static void exit_lmode(struct kvm_vcpu *vcpu) | |
1279 | { | |
ad312c7c | 1280 | vcpu->arch.shadow_efer &= ~EFER_LMA; |
6aa8b732 AK |
1281 | |
1282 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1283 | vmcs_read32(VM_ENTRY_CONTROLS) | |
1e4e6e00 | 1284 | & ~VM_ENTRY_IA32E_MODE); |
6aa8b732 AK |
1285 | } |
1286 | ||
1287 | #endif | |
1288 | ||
2384d2b3 SY |
1289 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
1290 | { | |
1291 | vpid_sync_vcpu_all(to_vmx(vcpu)); | |
1292 | } | |
1293 | ||
25c4c276 | 1294 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 | 1295 | { |
ad312c7c ZX |
1296 | vcpu->arch.cr4 &= KVM_GUEST_CR4_MASK; |
1297 | vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK; | |
399badf3 AK |
1298 | } |
1299 | ||
6aa8b732 AK |
1300 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
1301 | { | |
5fd86fcf AK |
1302 | vmx_fpu_deactivate(vcpu); |
1303 | ||
ad312c7c | 1304 | if (vcpu->arch.rmode.active && (cr0 & X86_CR0_PE)) |
6aa8b732 AK |
1305 | enter_pmode(vcpu); |
1306 | ||
ad312c7c | 1307 | if (!vcpu->arch.rmode.active && !(cr0 & X86_CR0_PE)) |
6aa8b732 AK |
1308 | enter_rmode(vcpu); |
1309 | ||
05b3e0c2 | 1310 | #ifdef CONFIG_X86_64 |
ad312c7c | 1311 | if (vcpu->arch.shadow_efer & EFER_LME) { |
707d92fa | 1312 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
6aa8b732 | 1313 | enter_lmode(vcpu); |
707d92fa | 1314 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
6aa8b732 AK |
1315 | exit_lmode(vcpu); |
1316 | } | |
1317 | #endif | |
1318 | ||
1319 | vmcs_writel(CR0_READ_SHADOW, cr0); | |
1320 | vmcs_writel(GUEST_CR0, | |
1321 | (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON); | |
ad312c7c | 1322 | vcpu->arch.cr0 = cr0; |
5fd86fcf | 1323 | |
707d92fa | 1324 | if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE)) |
5fd86fcf | 1325 | vmx_fpu_activate(vcpu); |
6aa8b732 AK |
1326 | } |
1327 | ||
6aa8b732 AK |
1328 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
1329 | { | |
2384d2b3 | 1330 | vmx_flush_tlb(vcpu); |
6aa8b732 | 1331 | vmcs_writel(GUEST_CR3, cr3); |
ad312c7c | 1332 | if (vcpu->arch.cr0 & X86_CR0_PE) |
5fd86fcf | 1333 | vmx_fpu_deactivate(vcpu); |
6aa8b732 AK |
1334 | } |
1335 | ||
1336 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
1337 | { | |
1338 | vmcs_writel(CR4_READ_SHADOW, cr4); | |
ad312c7c | 1339 | vmcs_writel(GUEST_CR4, cr4 | (vcpu->arch.rmode.active ? |
6aa8b732 | 1340 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON)); |
ad312c7c | 1341 | vcpu->arch.cr4 = cr4; |
6aa8b732 AK |
1342 | } |
1343 | ||
6aa8b732 AK |
1344 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
1345 | { | |
8b9cf98c RR |
1346 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
1347 | struct kvm_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); | |
6aa8b732 | 1348 | |
ad312c7c | 1349 | vcpu->arch.shadow_efer = efer; |
9f62e19a JR |
1350 | if (!msr) |
1351 | return; | |
6aa8b732 AK |
1352 | if (efer & EFER_LMA) { |
1353 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1354 | vmcs_read32(VM_ENTRY_CONTROLS) | | |
1e4e6e00 | 1355 | VM_ENTRY_IA32E_MODE); |
6aa8b732 AK |
1356 | msr->data = efer; |
1357 | ||
1358 | } else { | |
1359 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1360 | vmcs_read32(VM_ENTRY_CONTROLS) & | |
1e4e6e00 | 1361 | ~VM_ENTRY_IA32E_MODE); |
6aa8b732 AK |
1362 | |
1363 | msr->data = efer & ~EFER_LME; | |
1364 | } | |
8b9cf98c | 1365 | setup_msrs(vmx); |
6aa8b732 AK |
1366 | } |
1367 | ||
6aa8b732 AK |
1368 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
1369 | { | |
1370 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1371 | ||
1372 | return vmcs_readl(sf->base); | |
1373 | } | |
1374 | ||
1375 | static void vmx_get_segment(struct kvm_vcpu *vcpu, | |
1376 | struct kvm_segment *var, int seg) | |
1377 | { | |
1378 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1379 | u32 ar; | |
1380 | ||
1381 | var->base = vmcs_readl(sf->base); | |
1382 | var->limit = vmcs_read32(sf->limit); | |
1383 | var->selector = vmcs_read16(sf->selector); | |
1384 | ar = vmcs_read32(sf->ar_bytes); | |
1385 | if (ar & AR_UNUSABLE_MASK) | |
1386 | ar = 0; | |
1387 | var->type = ar & 15; | |
1388 | var->s = (ar >> 4) & 1; | |
1389 | var->dpl = (ar >> 5) & 3; | |
1390 | var->present = (ar >> 7) & 1; | |
1391 | var->avl = (ar >> 12) & 1; | |
1392 | var->l = (ar >> 13) & 1; | |
1393 | var->db = (ar >> 14) & 1; | |
1394 | var->g = (ar >> 15) & 1; | |
1395 | var->unusable = (ar >> 16) & 1; | |
1396 | } | |
1397 | ||
2e4d2653 IE |
1398 | static int vmx_get_cpl(struct kvm_vcpu *vcpu) |
1399 | { | |
1400 | struct kvm_segment kvm_seg; | |
1401 | ||
1402 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) /* if real mode */ | |
1403 | return 0; | |
1404 | ||
1405 | if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */ | |
1406 | return 3; | |
1407 | ||
1408 | vmx_get_segment(vcpu, &kvm_seg, VCPU_SREG_CS); | |
1409 | return kvm_seg.selector & 3; | |
1410 | } | |
1411 | ||
653e3108 | 1412 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
6aa8b732 | 1413 | { |
6aa8b732 AK |
1414 | u32 ar; |
1415 | ||
653e3108 | 1416 | if (var->unusable) |
6aa8b732 AK |
1417 | ar = 1 << 16; |
1418 | else { | |
1419 | ar = var->type & 15; | |
1420 | ar |= (var->s & 1) << 4; | |
1421 | ar |= (var->dpl & 3) << 5; | |
1422 | ar |= (var->present & 1) << 7; | |
1423 | ar |= (var->avl & 1) << 12; | |
1424 | ar |= (var->l & 1) << 13; | |
1425 | ar |= (var->db & 1) << 14; | |
1426 | ar |= (var->g & 1) << 15; | |
1427 | } | |
f7fbf1fd UL |
1428 | if (ar == 0) /* a 0 value means unusable */ |
1429 | ar = AR_UNUSABLE_MASK; | |
653e3108 AK |
1430 | |
1431 | return ar; | |
1432 | } | |
1433 | ||
1434 | static void vmx_set_segment(struct kvm_vcpu *vcpu, | |
1435 | struct kvm_segment *var, int seg) | |
1436 | { | |
1437 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1438 | u32 ar; | |
1439 | ||
ad312c7c ZX |
1440 | if (vcpu->arch.rmode.active && seg == VCPU_SREG_TR) { |
1441 | vcpu->arch.rmode.tr.selector = var->selector; | |
1442 | vcpu->arch.rmode.tr.base = var->base; | |
1443 | vcpu->arch.rmode.tr.limit = var->limit; | |
1444 | vcpu->arch.rmode.tr.ar = vmx_segment_access_rights(var); | |
653e3108 AK |
1445 | return; |
1446 | } | |
1447 | vmcs_writel(sf->base, var->base); | |
1448 | vmcs_write32(sf->limit, var->limit); | |
1449 | vmcs_write16(sf->selector, var->selector); | |
ad312c7c | 1450 | if (vcpu->arch.rmode.active && var->s) { |
653e3108 AK |
1451 | /* |
1452 | * Hack real-mode segments into vm86 compatibility. | |
1453 | */ | |
1454 | if (var->base == 0xffff0000 && var->selector == 0xf000) | |
1455 | vmcs_writel(sf->base, 0xf0000); | |
1456 | ar = 0xf3; | |
1457 | } else | |
1458 | ar = vmx_segment_access_rights(var); | |
6aa8b732 AK |
1459 | vmcs_write32(sf->ar_bytes, ar); |
1460 | } | |
1461 | ||
6aa8b732 AK |
1462 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
1463 | { | |
1464 | u32 ar = vmcs_read32(GUEST_CS_AR_BYTES); | |
1465 | ||
1466 | *db = (ar >> 14) & 1; | |
1467 | *l = (ar >> 13) & 1; | |
1468 | } | |
1469 | ||
1470 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1471 | { | |
1472 | dt->limit = vmcs_read32(GUEST_IDTR_LIMIT); | |
1473 | dt->base = vmcs_readl(GUEST_IDTR_BASE); | |
1474 | } | |
1475 | ||
1476 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1477 | { | |
1478 | vmcs_write32(GUEST_IDTR_LIMIT, dt->limit); | |
1479 | vmcs_writel(GUEST_IDTR_BASE, dt->base); | |
1480 | } | |
1481 | ||
1482 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1483 | { | |
1484 | dt->limit = vmcs_read32(GUEST_GDTR_LIMIT); | |
1485 | dt->base = vmcs_readl(GUEST_GDTR_BASE); | |
1486 | } | |
1487 | ||
1488 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1489 | { | |
1490 | vmcs_write32(GUEST_GDTR_LIMIT, dt->limit); | |
1491 | vmcs_writel(GUEST_GDTR_BASE, dt->base); | |
1492 | } | |
1493 | ||
d77c26fc | 1494 | static int init_rmode_tss(struct kvm *kvm) |
6aa8b732 | 1495 | { |
6aa8b732 | 1496 | gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT; |
195aefde | 1497 | u16 data = 0; |
10589a46 | 1498 | int ret = 0; |
195aefde | 1499 | int r; |
6aa8b732 | 1500 | |
707a18a5 | 1501 | down_read(&kvm->slots_lock); |
195aefde IE |
1502 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
1503 | if (r < 0) | |
10589a46 | 1504 | goto out; |
195aefde IE |
1505 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
1506 | r = kvm_write_guest_page(kvm, fn++, &data, 0x66, sizeof(u16)); | |
1507 | if (r < 0) | |
10589a46 | 1508 | goto out; |
195aefde IE |
1509 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
1510 | if (r < 0) | |
10589a46 | 1511 | goto out; |
195aefde IE |
1512 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
1513 | if (r < 0) | |
10589a46 | 1514 | goto out; |
195aefde | 1515 | data = ~0; |
10589a46 MT |
1516 | r = kvm_write_guest_page(kvm, fn, &data, |
1517 | RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, | |
1518 | sizeof(u8)); | |
195aefde | 1519 | if (r < 0) |
10589a46 MT |
1520 | goto out; |
1521 | ||
1522 | ret = 1; | |
1523 | out: | |
707a18a5 | 1524 | up_read(&kvm->slots_lock); |
10589a46 | 1525 | return ret; |
6aa8b732 AK |
1526 | } |
1527 | ||
6aa8b732 AK |
1528 | static void seg_setup(int seg) |
1529 | { | |
1530 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1531 | ||
1532 | vmcs_write16(sf->selector, 0); | |
1533 | vmcs_writel(sf->base, 0); | |
1534 | vmcs_write32(sf->limit, 0xffff); | |
1535 | vmcs_write32(sf->ar_bytes, 0x93); | |
1536 | } | |
1537 | ||
f78e0e2e SY |
1538 | static int alloc_apic_access_page(struct kvm *kvm) |
1539 | { | |
1540 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
1541 | int r = 0; | |
1542 | ||
72dc67a6 | 1543 | down_write(&kvm->slots_lock); |
bfc6d222 | 1544 | if (kvm->arch.apic_access_page) |
f78e0e2e SY |
1545 | goto out; |
1546 | kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; | |
1547 | kvm_userspace_mem.flags = 0; | |
1548 | kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL; | |
1549 | kvm_userspace_mem.memory_size = PAGE_SIZE; | |
1550 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
1551 | if (r) | |
1552 | goto out; | |
72dc67a6 IE |
1553 | |
1554 | down_read(¤t->mm->mmap_sem); | |
bfc6d222 | 1555 | kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00); |
72dc67a6 | 1556 | up_read(¤t->mm->mmap_sem); |
f78e0e2e | 1557 | out: |
72dc67a6 | 1558 | up_write(&kvm->slots_lock); |
f78e0e2e SY |
1559 | return r; |
1560 | } | |
1561 | ||
2384d2b3 SY |
1562 | static void allocate_vpid(struct vcpu_vmx *vmx) |
1563 | { | |
1564 | int vpid; | |
1565 | ||
1566 | vmx->vpid = 0; | |
1567 | if (!enable_vpid || !cpu_has_vmx_vpid()) | |
1568 | return; | |
1569 | spin_lock(&vmx_vpid_lock); | |
1570 | vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS); | |
1571 | if (vpid < VMX_NR_VPIDS) { | |
1572 | vmx->vpid = vpid; | |
1573 | __set_bit(vpid, vmx_vpid_bitmap); | |
1574 | } | |
1575 | spin_unlock(&vmx_vpid_lock); | |
1576 | } | |
1577 | ||
6aa8b732 AK |
1578 | /* |
1579 | * Sets up the vmcs for emulated real mode. | |
1580 | */ | |
8b9cf98c | 1581 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
6aa8b732 AK |
1582 | { |
1583 | u32 host_sysenter_cs; | |
1584 | u32 junk; | |
1585 | unsigned long a; | |
1586 | struct descriptor_table dt; | |
1587 | int i; | |
cd2276a7 | 1588 | unsigned long kvm_vmx_return; |
6e5d865c | 1589 | u32 exec_control; |
6aa8b732 | 1590 | |
6aa8b732 | 1591 | /* I/O */ |
fdef3ad1 HQ |
1592 | vmcs_write64(IO_BITMAP_A, page_to_phys(vmx_io_bitmap_a)); |
1593 | vmcs_write64(IO_BITMAP_B, page_to_phys(vmx_io_bitmap_b)); | |
6aa8b732 | 1594 | |
6aa8b732 AK |
1595 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
1596 | ||
6aa8b732 | 1597 | /* Control */ |
1c3d14fe YS |
1598 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, |
1599 | vmcs_config.pin_based_exec_ctrl); | |
6e5d865c YS |
1600 | |
1601 | exec_control = vmcs_config.cpu_based_exec_ctrl; | |
1602 | if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { | |
1603 | exec_control &= ~CPU_BASED_TPR_SHADOW; | |
1604 | #ifdef CONFIG_X86_64 | |
1605 | exec_control |= CPU_BASED_CR8_STORE_EXITING | | |
1606 | CPU_BASED_CR8_LOAD_EXITING; | |
1607 | #endif | |
1608 | } | |
1609 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); | |
6aa8b732 | 1610 | |
83ff3b9d SY |
1611 | if (cpu_has_secondary_exec_ctrls()) { |
1612 | exec_control = vmcs_config.cpu_based_2nd_exec_ctrl; | |
1613 | if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
1614 | exec_control &= | |
1615 | ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
2384d2b3 SY |
1616 | if (vmx->vpid == 0) |
1617 | exec_control &= ~SECONDARY_EXEC_ENABLE_VPID; | |
83ff3b9d SY |
1618 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); |
1619 | } | |
f78e0e2e | 1620 | |
c7addb90 AK |
1621 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf); |
1622 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf); | |
6aa8b732 AK |
1623 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
1624 | ||
1625 | vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */ | |
1626 | vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */ | |
1627 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ | |
1628 | ||
1629 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ | |
1630 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
1631 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
1632 | vmcs_write16(HOST_FS_SELECTOR, read_fs()); /* 22.2.4 */ | |
1633 | vmcs_write16(HOST_GS_SELECTOR, read_gs()); /* 22.2.4 */ | |
1634 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
05b3e0c2 | 1635 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1636 | rdmsrl(MSR_FS_BASE, a); |
1637 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ | |
1638 | rdmsrl(MSR_GS_BASE, a); | |
1639 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ | |
1640 | #else | |
1641 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ | |
1642 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ | |
1643 | #endif | |
1644 | ||
1645 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ | |
1646 | ||
1647 | get_idt(&dt); | |
1648 | vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */ | |
1649 | ||
d77c26fc | 1650 | asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return)); |
cd2276a7 | 1651 | vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */ |
2cc51560 ED |
1652 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
1653 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); | |
1654 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); | |
6aa8b732 AK |
1655 | |
1656 | rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk); | |
1657 | vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs); | |
1658 | rdmsrl(MSR_IA32_SYSENTER_ESP, a); | |
1659 | vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */ | |
1660 | rdmsrl(MSR_IA32_SYSENTER_EIP, a); | |
1661 | vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */ | |
1662 | ||
6aa8b732 AK |
1663 | for (i = 0; i < NR_VMX_MSR; ++i) { |
1664 | u32 index = vmx_msr_index[i]; | |
1665 | u32 data_low, data_high; | |
1666 | u64 data; | |
a2fa3e9f | 1667 | int j = vmx->nmsrs; |
6aa8b732 AK |
1668 | |
1669 | if (rdmsr_safe(index, &data_low, &data_high) < 0) | |
1670 | continue; | |
432bd6cb AK |
1671 | if (wrmsr_safe(index, data_low, data_high) < 0) |
1672 | continue; | |
6aa8b732 | 1673 | data = data_low | ((u64)data_high << 32); |
a2fa3e9f GH |
1674 | vmx->host_msrs[j].index = index; |
1675 | vmx->host_msrs[j].reserved = 0; | |
1676 | vmx->host_msrs[j].data = data; | |
1677 | vmx->guest_msrs[j] = vmx->host_msrs[j]; | |
1678 | ++vmx->nmsrs; | |
6aa8b732 | 1679 | } |
6aa8b732 | 1680 | |
1c3d14fe | 1681 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
6aa8b732 AK |
1682 | |
1683 | /* 22.2.1, 20.8.1 */ | |
1c3d14fe YS |
1684 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl); |
1685 | ||
e00c8cf2 AK |
1686 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
1687 | vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK); | |
1688 | ||
f78e0e2e | 1689 | |
e00c8cf2 AK |
1690 | return 0; |
1691 | } | |
1692 | ||
1693 | static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) | |
1694 | { | |
1695 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
1696 | u64 msr; | |
1697 | int ret; | |
1698 | ||
1699 | if (!init_rmode_tss(vmx->vcpu.kvm)) { | |
1700 | ret = -ENOMEM; | |
1701 | goto out; | |
1702 | } | |
1703 | ||
ad312c7c | 1704 | vmx->vcpu.arch.rmode.active = 0; |
e00c8cf2 | 1705 | |
ad312c7c | 1706 | vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
2d3ad1f4 | 1707 | kvm_set_cr8(&vmx->vcpu, 0); |
e00c8cf2 AK |
1708 | msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
1709 | if (vmx->vcpu.vcpu_id == 0) | |
1710 | msr |= MSR_IA32_APICBASE_BSP; | |
1711 | kvm_set_apic_base(&vmx->vcpu, msr); | |
1712 | ||
1713 | fx_init(&vmx->vcpu); | |
1714 | ||
1715 | /* | |
1716 | * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode | |
1717 | * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh. | |
1718 | */ | |
1719 | if (vmx->vcpu.vcpu_id == 0) { | |
1720 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); | |
1721 | vmcs_writel(GUEST_CS_BASE, 0x000f0000); | |
1722 | } else { | |
ad312c7c ZX |
1723 | vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8); |
1724 | vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12); | |
e00c8cf2 AK |
1725 | } |
1726 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); | |
1727 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); | |
1728 | ||
1729 | seg_setup(VCPU_SREG_DS); | |
1730 | seg_setup(VCPU_SREG_ES); | |
1731 | seg_setup(VCPU_SREG_FS); | |
1732 | seg_setup(VCPU_SREG_GS); | |
1733 | seg_setup(VCPU_SREG_SS); | |
1734 | ||
1735 | vmcs_write16(GUEST_TR_SELECTOR, 0); | |
1736 | vmcs_writel(GUEST_TR_BASE, 0); | |
1737 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); | |
1738 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); | |
1739 | ||
1740 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); | |
1741 | vmcs_writel(GUEST_LDTR_BASE, 0); | |
1742 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); | |
1743 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); | |
1744 | ||
1745 | vmcs_write32(GUEST_SYSENTER_CS, 0); | |
1746 | vmcs_writel(GUEST_SYSENTER_ESP, 0); | |
1747 | vmcs_writel(GUEST_SYSENTER_EIP, 0); | |
1748 | ||
1749 | vmcs_writel(GUEST_RFLAGS, 0x02); | |
1750 | if (vmx->vcpu.vcpu_id == 0) | |
1751 | vmcs_writel(GUEST_RIP, 0xfff0); | |
1752 | else | |
1753 | vmcs_writel(GUEST_RIP, 0); | |
1754 | vmcs_writel(GUEST_RSP, 0); | |
1755 | ||
1756 | /* todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0 */ | |
1757 | vmcs_writel(GUEST_DR7, 0x400); | |
1758 | ||
1759 | vmcs_writel(GUEST_GDTR_BASE, 0); | |
1760 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); | |
1761 | ||
1762 | vmcs_writel(GUEST_IDTR_BASE, 0); | |
1763 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); | |
1764 | ||
1765 | vmcs_write32(GUEST_ACTIVITY_STATE, 0); | |
1766 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); | |
1767 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); | |
1768 | ||
1769 | guest_write_tsc(0); | |
1770 | ||
1771 | /* Special registers */ | |
1772 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
1773 | ||
1774 | setup_msrs(vmx); | |
1775 | ||
6aa8b732 AK |
1776 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
1777 | ||
f78e0e2e SY |
1778 | if (cpu_has_vmx_tpr_shadow()) { |
1779 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); | |
1780 | if (vm_need_tpr_shadow(vmx->vcpu.kvm)) | |
1781 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, | |
ad312c7c | 1782 | page_to_phys(vmx->vcpu.arch.apic->regs_page)); |
f78e0e2e SY |
1783 | vmcs_write32(TPR_THRESHOLD, 0); |
1784 | } | |
1785 | ||
1786 | if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
1787 | vmcs_write64(APIC_ACCESS_ADDR, | |
bfc6d222 | 1788 | page_to_phys(vmx->vcpu.kvm->arch.apic_access_page)); |
6aa8b732 | 1789 | |
2384d2b3 SY |
1790 | if (vmx->vpid != 0) |
1791 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
1792 | ||
ad312c7c ZX |
1793 | vmx->vcpu.arch.cr0 = 0x60000010; |
1794 | vmx_set_cr0(&vmx->vcpu, vmx->vcpu.arch.cr0); /* enter rmode */ | |
8b9cf98c | 1795 | vmx_set_cr4(&vmx->vcpu, 0); |
8b9cf98c | 1796 | vmx_set_efer(&vmx->vcpu, 0); |
8b9cf98c RR |
1797 | vmx_fpu_activate(&vmx->vcpu); |
1798 | update_exception_bitmap(&vmx->vcpu); | |
6aa8b732 | 1799 | |
2384d2b3 SY |
1800 | vpid_sync_vcpu_all(vmx); |
1801 | ||
6aa8b732 AK |
1802 | return 0; |
1803 | ||
6aa8b732 AK |
1804 | out: |
1805 | return ret; | |
1806 | } | |
1807 | ||
85f455f7 ED |
1808 | static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq) |
1809 | { | |
9c8cba37 AK |
1810 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
1811 | ||
ad312c7c | 1812 | if (vcpu->arch.rmode.active) { |
9c8cba37 AK |
1813 | vmx->rmode.irq.pending = true; |
1814 | vmx->rmode.irq.vector = irq; | |
1815 | vmx->rmode.irq.rip = vmcs_readl(GUEST_RIP); | |
9c5623e3 AK |
1816 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
1817 | irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK); | |
1818 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1); | |
9c8cba37 | 1819 | vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip - 1); |
85f455f7 ED |
1820 | return; |
1821 | } | |
1822 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, | |
1823 | irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); | |
1824 | } | |
1825 | ||
6aa8b732 AK |
1826 | static void kvm_do_inject_irq(struct kvm_vcpu *vcpu) |
1827 | { | |
ad312c7c ZX |
1828 | int word_index = __ffs(vcpu->arch.irq_summary); |
1829 | int bit_index = __ffs(vcpu->arch.irq_pending[word_index]); | |
6aa8b732 AK |
1830 | int irq = word_index * BITS_PER_LONG + bit_index; |
1831 | ||
ad312c7c ZX |
1832 | clear_bit(bit_index, &vcpu->arch.irq_pending[word_index]); |
1833 | if (!vcpu->arch.irq_pending[word_index]) | |
1834 | clear_bit(word_index, &vcpu->arch.irq_summary); | |
85f455f7 | 1835 | vmx_inject_irq(vcpu, irq); |
6aa8b732 AK |
1836 | } |
1837 | ||
c1150d8c DL |
1838 | |
1839 | static void do_interrupt_requests(struct kvm_vcpu *vcpu, | |
1840 | struct kvm_run *kvm_run) | |
6aa8b732 | 1841 | { |
c1150d8c DL |
1842 | u32 cpu_based_vm_exec_control; |
1843 | ||
ad312c7c | 1844 | vcpu->arch.interrupt_window_open = |
c1150d8c DL |
1845 | ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
1846 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); | |
1847 | ||
ad312c7c ZX |
1848 | if (vcpu->arch.interrupt_window_open && |
1849 | vcpu->arch.irq_summary && | |
c1150d8c | 1850 | !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK)) |
6aa8b732 | 1851 | /* |
c1150d8c | 1852 | * If interrupts enabled, and not blocked by sti or mov ss. Good. |
6aa8b732 AK |
1853 | */ |
1854 | kvm_do_inject_irq(vcpu); | |
c1150d8c DL |
1855 | |
1856 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
ad312c7c ZX |
1857 | if (!vcpu->arch.interrupt_window_open && |
1858 | (vcpu->arch.irq_summary || kvm_run->request_interrupt_window)) | |
6aa8b732 AK |
1859 | /* |
1860 | * Interrupts blocked. Wait for unblock. | |
1861 | */ | |
c1150d8c DL |
1862 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; |
1863 | else | |
1864 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
1865 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
6aa8b732 AK |
1866 | } |
1867 | ||
cbc94022 IE |
1868 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
1869 | { | |
1870 | int ret; | |
1871 | struct kvm_userspace_memory_region tss_mem = { | |
1872 | .slot = 8, | |
1873 | .guest_phys_addr = addr, | |
1874 | .memory_size = PAGE_SIZE * 3, | |
1875 | .flags = 0, | |
1876 | }; | |
1877 | ||
1878 | ret = kvm_set_memory_region(kvm, &tss_mem, 0); | |
1879 | if (ret) | |
1880 | return ret; | |
bfc6d222 | 1881 | kvm->arch.tss_addr = addr; |
cbc94022 IE |
1882 | return 0; |
1883 | } | |
1884 | ||
6aa8b732 AK |
1885 | static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu) |
1886 | { | |
1887 | struct kvm_guest_debug *dbg = &vcpu->guest_debug; | |
1888 | ||
1889 | set_debugreg(dbg->bp[0], 0); | |
1890 | set_debugreg(dbg->bp[1], 1); | |
1891 | set_debugreg(dbg->bp[2], 2); | |
1892 | set_debugreg(dbg->bp[3], 3); | |
1893 | ||
1894 | if (dbg->singlestep) { | |
1895 | unsigned long flags; | |
1896 | ||
1897 | flags = vmcs_readl(GUEST_RFLAGS); | |
1898 | flags |= X86_EFLAGS_TF | X86_EFLAGS_RF; | |
1899 | vmcs_writel(GUEST_RFLAGS, flags); | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, | |
1904 | int vec, u32 err_code) | |
1905 | { | |
ad312c7c | 1906 | if (!vcpu->arch.rmode.active) |
6aa8b732 AK |
1907 | return 0; |
1908 | ||
b3f37707 NK |
1909 | /* |
1910 | * Instruction with address size override prefix opcode 0x67 | |
1911 | * Cause the #SS fault with 0 error code in VM86 mode. | |
1912 | */ | |
1913 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) | |
3427318f | 1914 | if (emulate_instruction(vcpu, NULL, 0, 0, 0) == EMULATE_DONE) |
6aa8b732 AK |
1915 | return 1; |
1916 | return 0; | |
1917 | } | |
1918 | ||
1919 | static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
1920 | { | |
1155f76a | 1921 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 AK |
1922 | u32 intr_info, error_code; |
1923 | unsigned long cr2, rip; | |
1924 | u32 vect_info; | |
1925 | enum emulation_result er; | |
1926 | ||
1155f76a | 1927 | vect_info = vmx->idt_vectoring_info; |
6aa8b732 AK |
1928 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
1929 | ||
1930 | if ((vect_info & VECTORING_INFO_VALID_MASK) && | |
d77c26fc | 1931 | !is_page_fault(intr_info)) |
6aa8b732 | 1932 | printk(KERN_ERR "%s: unexpected, vectoring info 0x%x " |
b8688d51 | 1933 | "intr info 0x%x\n", __func__, vect_info, intr_info); |
6aa8b732 | 1934 | |
85f455f7 | 1935 | if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) { |
6aa8b732 | 1936 | int irq = vect_info & VECTORING_INFO_VECTOR_MASK; |
ad312c7c ZX |
1937 | set_bit(irq, vcpu->arch.irq_pending); |
1938 | set_bit(irq / BITS_PER_LONG, &vcpu->arch.irq_summary); | |
6aa8b732 AK |
1939 | } |
1940 | ||
1b6269db AK |
1941 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ |
1942 | return 1; /* already handled by vmx_vcpu_run() */ | |
2ab455cc AL |
1943 | |
1944 | if (is_no_device(intr_info)) { | |
5fd86fcf | 1945 | vmx_fpu_activate(vcpu); |
2ab455cc AL |
1946 | return 1; |
1947 | } | |
1948 | ||
7aa81cc0 | 1949 | if (is_invalid_opcode(intr_info)) { |
571008da | 1950 | er = emulate_instruction(vcpu, kvm_run, 0, 0, EMULTYPE_TRAP_UD); |
7aa81cc0 | 1951 | if (er != EMULATE_DONE) |
7ee5d940 | 1952 | kvm_queue_exception(vcpu, UD_VECTOR); |
7aa81cc0 AL |
1953 | return 1; |
1954 | } | |
1955 | ||
6aa8b732 AK |
1956 | error_code = 0; |
1957 | rip = vmcs_readl(GUEST_RIP); | |
2e11384c | 1958 | if (intr_info & INTR_INFO_DELIVER_CODE_MASK) |
6aa8b732 AK |
1959 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
1960 | if (is_page_fault(intr_info)) { | |
1961 | cr2 = vmcs_readl(EXIT_QUALIFICATION); | |
3067714c | 1962 | return kvm_mmu_page_fault(vcpu, cr2, error_code); |
6aa8b732 AK |
1963 | } |
1964 | ||
ad312c7c | 1965 | if (vcpu->arch.rmode.active && |
6aa8b732 | 1966 | handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK, |
72d6e5a0 | 1967 | error_code)) { |
ad312c7c ZX |
1968 | if (vcpu->arch.halt_request) { |
1969 | vcpu->arch.halt_request = 0; | |
72d6e5a0 AK |
1970 | return kvm_emulate_halt(vcpu); |
1971 | } | |
6aa8b732 | 1972 | return 1; |
72d6e5a0 | 1973 | } |
6aa8b732 | 1974 | |
d77c26fc MD |
1975 | if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) == |
1976 | (INTR_TYPE_EXCEPTION | 1)) { | |
6aa8b732 AK |
1977 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
1978 | return 0; | |
1979 | } | |
1980 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; | |
1981 | kvm_run->ex.exception = intr_info & INTR_INFO_VECTOR_MASK; | |
1982 | kvm_run->ex.error_code = error_code; | |
1983 | return 0; | |
1984 | } | |
1985 | ||
1986 | static int handle_external_interrupt(struct kvm_vcpu *vcpu, | |
1987 | struct kvm_run *kvm_run) | |
1988 | { | |
1165f5fe | 1989 | ++vcpu->stat.irq_exits; |
6aa8b732 AK |
1990 | return 1; |
1991 | } | |
1992 | ||
988ad74f AK |
1993 | static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
1994 | { | |
1995 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
1996 | return 0; | |
1997 | } | |
6aa8b732 | 1998 | |
6aa8b732 AK |
1999 | static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2000 | { | |
bfdaab09 | 2001 | unsigned long exit_qualification; |
039576c0 AK |
2002 | int size, down, in, string, rep; |
2003 | unsigned port; | |
6aa8b732 | 2004 | |
1165f5fe | 2005 | ++vcpu->stat.io_exits; |
bfdaab09 | 2006 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
039576c0 | 2007 | string = (exit_qualification & 16) != 0; |
e70669ab LV |
2008 | |
2009 | if (string) { | |
3427318f LV |
2010 | if (emulate_instruction(vcpu, |
2011 | kvm_run, 0, 0, 0) == EMULATE_DO_MMIO) | |
e70669ab LV |
2012 | return 0; |
2013 | return 1; | |
2014 | } | |
2015 | ||
2016 | size = (exit_qualification & 7) + 1; | |
2017 | in = (exit_qualification & 8) != 0; | |
039576c0 | 2018 | down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0; |
039576c0 AK |
2019 | rep = (exit_qualification & 32) != 0; |
2020 | port = exit_qualification >> 16; | |
e70669ab | 2021 | |
3090dd73 | 2022 | return kvm_emulate_pio(vcpu, kvm_run, in, size, port); |
6aa8b732 AK |
2023 | } |
2024 | ||
102d8325 IM |
2025 | static void |
2026 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
2027 | { | |
2028 | /* | |
2029 | * Patch in the VMCALL instruction: | |
2030 | */ | |
2031 | hypercall[0] = 0x0f; | |
2032 | hypercall[1] = 0x01; | |
2033 | hypercall[2] = 0xc1; | |
102d8325 IM |
2034 | } |
2035 | ||
6aa8b732 AK |
2036 | static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2037 | { | |
bfdaab09 | 2038 | unsigned long exit_qualification; |
6aa8b732 AK |
2039 | int cr; |
2040 | int reg; | |
2041 | ||
bfdaab09 | 2042 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
6aa8b732 AK |
2043 | cr = exit_qualification & 15; |
2044 | reg = (exit_qualification >> 8) & 15; | |
2045 | switch ((exit_qualification >> 4) & 3) { | |
2046 | case 0: /* mov to cr */ | |
2047 | switch (cr) { | |
2048 | case 0: | |
2049 | vcpu_load_rsp_rip(vcpu); | |
2d3ad1f4 | 2050 | kvm_set_cr0(vcpu, vcpu->arch.regs[reg]); |
6aa8b732 AK |
2051 | skip_emulated_instruction(vcpu); |
2052 | return 1; | |
2053 | case 3: | |
2054 | vcpu_load_rsp_rip(vcpu); | |
2d3ad1f4 | 2055 | kvm_set_cr3(vcpu, vcpu->arch.regs[reg]); |
6aa8b732 AK |
2056 | skip_emulated_instruction(vcpu); |
2057 | return 1; | |
2058 | case 4: | |
2059 | vcpu_load_rsp_rip(vcpu); | |
2d3ad1f4 | 2060 | kvm_set_cr4(vcpu, vcpu->arch.regs[reg]); |
6aa8b732 AK |
2061 | skip_emulated_instruction(vcpu); |
2062 | return 1; | |
2063 | case 8: | |
2064 | vcpu_load_rsp_rip(vcpu); | |
2d3ad1f4 | 2065 | kvm_set_cr8(vcpu, vcpu->arch.regs[reg]); |
6aa8b732 | 2066 | skip_emulated_instruction(vcpu); |
e5314067 AK |
2067 | if (irqchip_in_kernel(vcpu->kvm)) |
2068 | return 1; | |
253abdee YS |
2069 | kvm_run->exit_reason = KVM_EXIT_SET_TPR; |
2070 | return 0; | |
6aa8b732 AK |
2071 | }; |
2072 | break; | |
25c4c276 AL |
2073 | case 2: /* clts */ |
2074 | vcpu_load_rsp_rip(vcpu); | |
5fd86fcf | 2075 | vmx_fpu_deactivate(vcpu); |
ad312c7c ZX |
2076 | vcpu->arch.cr0 &= ~X86_CR0_TS; |
2077 | vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0); | |
5fd86fcf | 2078 | vmx_fpu_activate(vcpu); |
25c4c276 AL |
2079 | skip_emulated_instruction(vcpu); |
2080 | return 1; | |
6aa8b732 AK |
2081 | case 1: /*mov from cr*/ |
2082 | switch (cr) { | |
2083 | case 3: | |
2084 | vcpu_load_rsp_rip(vcpu); | |
ad312c7c | 2085 | vcpu->arch.regs[reg] = vcpu->arch.cr3; |
6aa8b732 AK |
2086 | vcpu_put_rsp_rip(vcpu); |
2087 | skip_emulated_instruction(vcpu); | |
2088 | return 1; | |
2089 | case 8: | |
6aa8b732 | 2090 | vcpu_load_rsp_rip(vcpu); |
2d3ad1f4 | 2091 | vcpu->arch.regs[reg] = kvm_get_cr8(vcpu); |
6aa8b732 AK |
2092 | vcpu_put_rsp_rip(vcpu); |
2093 | skip_emulated_instruction(vcpu); | |
2094 | return 1; | |
2095 | } | |
2096 | break; | |
2097 | case 3: /* lmsw */ | |
2d3ad1f4 | 2098 | kvm_lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f); |
6aa8b732 AK |
2099 | |
2100 | skip_emulated_instruction(vcpu); | |
2101 | return 1; | |
2102 | default: | |
2103 | break; | |
2104 | } | |
2105 | kvm_run->exit_reason = 0; | |
f0242478 | 2106 | pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
6aa8b732 AK |
2107 | (int)(exit_qualification >> 4) & 3, cr); |
2108 | return 0; | |
2109 | } | |
2110 | ||
2111 | static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2112 | { | |
bfdaab09 | 2113 | unsigned long exit_qualification; |
6aa8b732 AK |
2114 | unsigned long val; |
2115 | int dr, reg; | |
2116 | ||
2117 | /* | |
2118 | * FIXME: this code assumes the host is debugging the guest. | |
2119 | * need to deal with guest debugging itself too. | |
2120 | */ | |
bfdaab09 | 2121 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
6aa8b732 AK |
2122 | dr = exit_qualification & 7; |
2123 | reg = (exit_qualification >> 8) & 15; | |
2124 | vcpu_load_rsp_rip(vcpu); | |
2125 | if (exit_qualification & 16) { | |
2126 | /* mov from dr */ | |
2127 | switch (dr) { | |
2128 | case 6: | |
2129 | val = 0xffff0ff0; | |
2130 | break; | |
2131 | case 7: | |
2132 | val = 0x400; | |
2133 | break; | |
2134 | default: | |
2135 | val = 0; | |
2136 | } | |
ad312c7c | 2137 | vcpu->arch.regs[reg] = val; |
6aa8b732 AK |
2138 | } else { |
2139 | /* mov to dr */ | |
2140 | } | |
2141 | vcpu_put_rsp_rip(vcpu); | |
2142 | skip_emulated_instruction(vcpu); | |
2143 | return 1; | |
2144 | } | |
2145 | ||
2146 | static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2147 | { | |
06465c5a AK |
2148 | kvm_emulate_cpuid(vcpu); |
2149 | return 1; | |
6aa8b732 AK |
2150 | } |
2151 | ||
2152 | static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2153 | { | |
ad312c7c | 2154 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
6aa8b732 AK |
2155 | u64 data; |
2156 | ||
2157 | if (vmx_get_msr(vcpu, ecx, &data)) { | |
c1a5d4f9 | 2158 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
2159 | return 1; |
2160 | } | |
2161 | ||
2162 | /* FIXME: handling of bits 32:63 of rax, rdx */ | |
ad312c7c ZX |
2163 | vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u; |
2164 | vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u; | |
6aa8b732 AK |
2165 | skip_emulated_instruction(vcpu); |
2166 | return 1; | |
2167 | } | |
2168 | ||
2169 | static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2170 | { | |
ad312c7c ZX |
2171 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
2172 | u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u) | |
2173 | | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32); | |
6aa8b732 AK |
2174 | |
2175 | if (vmx_set_msr(vcpu, ecx, data) != 0) { | |
c1a5d4f9 | 2176 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
2177 | return 1; |
2178 | } | |
2179 | ||
2180 | skip_emulated_instruction(vcpu); | |
2181 | return 1; | |
2182 | } | |
2183 | ||
6e5d865c YS |
2184 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu, |
2185 | struct kvm_run *kvm_run) | |
2186 | { | |
2187 | return 1; | |
2188 | } | |
2189 | ||
6aa8b732 AK |
2190 | static int handle_interrupt_window(struct kvm_vcpu *vcpu, |
2191 | struct kvm_run *kvm_run) | |
2192 | { | |
85f455f7 ED |
2193 | u32 cpu_based_vm_exec_control; |
2194 | ||
2195 | /* clear pending irq */ | |
2196 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
2197 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
2198 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
c1150d8c DL |
2199 | /* |
2200 | * If the user space waits to inject interrupts, exit as soon as | |
2201 | * possible | |
2202 | */ | |
2203 | if (kvm_run->request_interrupt_window && | |
ad312c7c | 2204 | !vcpu->arch.irq_summary) { |
c1150d8c | 2205 | kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
1165f5fe | 2206 | ++vcpu->stat.irq_window_exits; |
c1150d8c DL |
2207 | return 0; |
2208 | } | |
6aa8b732 AK |
2209 | return 1; |
2210 | } | |
2211 | ||
2212 | static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2213 | { | |
2214 | skip_emulated_instruction(vcpu); | |
d3bef15f | 2215 | return kvm_emulate_halt(vcpu); |
6aa8b732 AK |
2216 | } |
2217 | ||
c21415e8 IM |
2218 | static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2219 | { | |
510043da | 2220 | skip_emulated_instruction(vcpu); |
7aa81cc0 AL |
2221 | kvm_emulate_hypercall(vcpu); |
2222 | return 1; | |
c21415e8 IM |
2223 | } |
2224 | ||
e5edaa01 ED |
2225 | static int handle_wbinvd(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2226 | { | |
2227 | skip_emulated_instruction(vcpu); | |
2228 | /* TODO: Add support for VT-d/pass-through device */ | |
2229 | return 1; | |
2230 | } | |
2231 | ||
f78e0e2e SY |
2232 | static int handle_apic_access(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2233 | { | |
2234 | u64 exit_qualification; | |
2235 | enum emulation_result er; | |
2236 | unsigned long offset; | |
2237 | ||
2238 | exit_qualification = vmcs_read64(EXIT_QUALIFICATION); | |
2239 | offset = exit_qualification & 0xffful; | |
2240 | ||
2241 | er = emulate_instruction(vcpu, kvm_run, 0, 0, 0); | |
2242 | ||
2243 | if (er != EMULATE_DONE) { | |
2244 | printk(KERN_ERR | |
2245 | "Fail to handle apic access vmexit! Offset is 0x%lx\n", | |
2246 | offset); | |
2247 | return -ENOTSUPP; | |
2248 | } | |
2249 | return 1; | |
2250 | } | |
2251 | ||
6aa8b732 AK |
2252 | /* |
2253 | * The exit handlers return 1 if the exit was handled fully and guest execution | |
2254 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs | |
2255 | * to be done to userspace and return 0. | |
2256 | */ | |
2257 | static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu, | |
2258 | struct kvm_run *kvm_run) = { | |
2259 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, | |
2260 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, | |
988ad74f | 2261 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
6aa8b732 | 2262 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
6aa8b732 AK |
2263 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
2264 | [EXIT_REASON_DR_ACCESS] = handle_dr, | |
2265 | [EXIT_REASON_CPUID] = handle_cpuid, | |
2266 | [EXIT_REASON_MSR_READ] = handle_rdmsr, | |
2267 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, | |
2268 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, | |
2269 | [EXIT_REASON_HLT] = handle_halt, | |
c21415e8 | 2270 | [EXIT_REASON_VMCALL] = handle_vmcall, |
f78e0e2e SY |
2271 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
2272 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, | |
e5edaa01 | 2273 | [EXIT_REASON_WBINVD] = handle_wbinvd, |
6aa8b732 AK |
2274 | }; |
2275 | ||
2276 | static const int kvm_vmx_max_exit_handlers = | |
50a3485c | 2277 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
6aa8b732 AK |
2278 | |
2279 | /* | |
2280 | * The guest has exited. See if we can fix it or if we need userspace | |
2281 | * assistance. | |
2282 | */ | |
2283 | static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) | |
2284 | { | |
6aa8b732 | 2285 | u32 exit_reason = vmcs_read32(VM_EXIT_REASON); |
29bd8a78 | 2286 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
1155f76a | 2287 | u32 vectoring_info = vmx->idt_vectoring_info; |
29bd8a78 AK |
2288 | |
2289 | if (unlikely(vmx->fail)) { | |
2290 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
2291 | kvm_run->fail_entry.hardware_entry_failure_reason | |
2292 | = vmcs_read32(VM_INSTRUCTION_ERROR); | |
2293 | return 0; | |
2294 | } | |
6aa8b732 | 2295 | |
d77c26fc MD |
2296 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
2297 | exit_reason != EXIT_REASON_EXCEPTION_NMI) | |
6aa8b732 | 2298 | printk(KERN_WARNING "%s: unexpected, valid vectoring info and " |
b8688d51 | 2299 | "exit reason is 0x%x\n", __func__, exit_reason); |
6aa8b732 AK |
2300 | if (exit_reason < kvm_vmx_max_exit_handlers |
2301 | && kvm_vmx_exit_handlers[exit_reason]) | |
2302 | return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run); | |
2303 | else { | |
2304 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; | |
2305 | kvm_run->hw.hardware_exit_reason = exit_reason; | |
2306 | } | |
2307 | return 0; | |
2308 | } | |
2309 | ||
6e5d865c YS |
2310 | static void update_tpr_threshold(struct kvm_vcpu *vcpu) |
2311 | { | |
2312 | int max_irr, tpr; | |
2313 | ||
2314 | if (!vm_need_tpr_shadow(vcpu->kvm)) | |
2315 | return; | |
2316 | ||
2317 | if (!kvm_lapic_enabled(vcpu) || | |
2318 | ((max_irr = kvm_lapic_find_highest_irr(vcpu)) == -1)) { | |
2319 | vmcs_write32(TPR_THRESHOLD, 0); | |
2320 | return; | |
2321 | } | |
2322 | ||
2323 | tpr = (kvm_lapic_get_cr8(vcpu) & 0x0f) << 4; | |
2324 | vmcs_write32(TPR_THRESHOLD, (max_irr > tpr) ? tpr >> 4 : max_irr >> 4); | |
2325 | } | |
2326 | ||
85f455f7 ED |
2327 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
2328 | { | |
2329 | u32 cpu_based_vm_exec_control; | |
2330 | ||
2331 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
2332 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; | |
2333 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2334 | } | |
2335 | ||
2336 | static void vmx_intr_assist(struct kvm_vcpu *vcpu) | |
2337 | { | |
1155f76a | 2338 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
85f455f7 ED |
2339 | u32 idtv_info_field, intr_info_field; |
2340 | int has_ext_irq, interrupt_window_open; | |
1b9778da | 2341 | int vector; |
85f455f7 | 2342 | |
6e5d865c YS |
2343 | update_tpr_threshold(vcpu); |
2344 | ||
85f455f7 ED |
2345 | has_ext_irq = kvm_cpu_has_interrupt(vcpu); |
2346 | intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD); | |
1155f76a | 2347 | idtv_info_field = vmx->idt_vectoring_info; |
85f455f7 ED |
2348 | if (intr_info_field & INTR_INFO_VALID_MASK) { |
2349 | if (idtv_info_field & INTR_INFO_VALID_MASK) { | |
2350 | /* TODO: fault when IDT_Vectoring */ | |
9584bf2c RH |
2351 | if (printk_ratelimit()) |
2352 | printk(KERN_ERR "Fault when IDT_Vectoring\n"); | |
85f455f7 ED |
2353 | } |
2354 | if (has_ext_irq) | |
2355 | enable_irq_window(vcpu); | |
2356 | return; | |
2357 | } | |
2358 | if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) { | |
9c8cba37 AK |
2359 | if ((idtv_info_field & VECTORING_INFO_TYPE_MASK) |
2360 | == INTR_TYPE_EXT_INTR | |
ad312c7c | 2361 | && vcpu->arch.rmode.active) { |
9c8cba37 AK |
2362 | u8 vect = idtv_info_field & VECTORING_INFO_VECTOR_MASK; |
2363 | ||
2364 | vmx_inject_irq(vcpu, vect); | |
2365 | if (unlikely(has_ext_irq)) | |
2366 | enable_irq_window(vcpu); | |
2367 | return; | |
2368 | } | |
2369 | ||
85f455f7 ED |
2370 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field); |
2371 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
2372 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN)); | |
2373 | ||
2e11384c | 2374 | if (unlikely(idtv_info_field & INTR_INFO_DELIVER_CODE_MASK)) |
85f455f7 ED |
2375 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, |
2376 | vmcs_read32(IDT_VECTORING_ERROR_CODE)); | |
2377 | if (unlikely(has_ext_irq)) | |
2378 | enable_irq_window(vcpu); | |
2379 | return; | |
2380 | } | |
2381 | if (!has_ext_irq) | |
2382 | return; | |
2383 | interrupt_window_open = | |
2384 | ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && | |
2385 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); | |
1b9778da ED |
2386 | if (interrupt_window_open) { |
2387 | vector = kvm_cpu_get_interrupt(vcpu); | |
2388 | vmx_inject_irq(vcpu, vector); | |
2389 | kvm_timer_intr_post(vcpu, vector); | |
2390 | } else | |
85f455f7 ED |
2391 | enable_irq_window(vcpu); |
2392 | } | |
2393 | ||
9c8cba37 AK |
2394 | /* |
2395 | * Failure to inject an interrupt should give us the information | |
2396 | * in IDT_VECTORING_INFO_FIELD. However, if the failure occurs | |
2397 | * when fetching the interrupt redirection bitmap in the real-mode | |
2398 | * tss, this doesn't happen. So we do it ourselves. | |
2399 | */ | |
2400 | static void fixup_rmode_irq(struct vcpu_vmx *vmx) | |
2401 | { | |
2402 | vmx->rmode.irq.pending = 0; | |
2403 | if (vmcs_readl(GUEST_RIP) + 1 != vmx->rmode.irq.rip) | |
2404 | return; | |
2405 | vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip); | |
2406 | if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) { | |
2407 | vmx->idt_vectoring_info &= ~VECTORING_INFO_TYPE_MASK; | |
2408 | vmx->idt_vectoring_info |= INTR_TYPE_EXT_INTR; | |
2409 | return; | |
2410 | } | |
2411 | vmx->idt_vectoring_info = | |
2412 | VECTORING_INFO_VALID_MASK | |
2413 | | INTR_TYPE_EXT_INTR | |
2414 | | vmx->rmode.irq.vector; | |
2415 | } | |
2416 | ||
04d2cc77 | 2417 | static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6aa8b732 | 2418 | { |
a2fa3e9f | 2419 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
1b6269db | 2420 | u32 intr_info; |
e6adf283 AK |
2421 | |
2422 | /* | |
2423 | * Loading guest fpu may have cleared host cr0.ts | |
2424 | */ | |
2425 | vmcs_writel(HOST_CR0, read_cr0()); | |
2426 | ||
d77c26fc | 2427 | asm( |
6aa8b732 | 2428 | /* Store host registers */ |
05b3e0c2 | 2429 | #ifdef CONFIG_X86_64 |
c2036300 | 2430 | "push %%rdx; push %%rbp;" |
6aa8b732 | 2431 | "push %%rcx \n\t" |
6aa8b732 | 2432 | #else |
ff593e5a LV |
2433 | "push %%edx; push %%ebp;" |
2434 | "push %%ecx \n\t" | |
6aa8b732 | 2435 | #endif |
c2036300 | 2436 | ASM_VMX_VMWRITE_RSP_RDX "\n\t" |
6aa8b732 | 2437 | /* Check if vmlaunch of vmresume is needed */ |
e08aa78a | 2438 | "cmpl $0, %c[launched](%0) \n\t" |
6aa8b732 | 2439 | /* Load guest registers. Don't clobber flags. */ |
05b3e0c2 | 2440 | #ifdef CONFIG_X86_64 |
e08aa78a | 2441 | "mov %c[cr2](%0), %%rax \n\t" |
6aa8b732 | 2442 | "mov %%rax, %%cr2 \n\t" |
e08aa78a AK |
2443 | "mov %c[rax](%0), %%rax \n\t" |
2444 | "mov %c[rbx](%0), %%rbx \n\t" | |
2445 | "mov %c[rdx](%0), %%rdx \n\t" | |
2446 | "mov %c[rsi](%0), %%rsi \n\t" | |
2447 | "mov %c[rdi](%0), %%rdi \n\t" | |
2448 | "mov %c[rbp](%0), %%rbp \n\t" | |
2449 | "mov %c[r8](%0), %%r8 \n\t" | |
2450 | "mov %c[r9](%0), %%r9 \n\t" | |
2451 | "mov %c[r10](%0), %%r10 \n\t" | |
2452 | "mov %c[r11](%0), %%r11 \n\t" | |
2453 | "mov %c[r12](%0), %%r12 \n\t" | |
2454 | "mov %c[r13](%0), %%r13 \n\t" | |
2455 | "mov %c[r14](%0), %%r14 \n\t" | |
2456 | "mov %c[r15](%0), %%r15 \n\t" | |
2457 | "mov %c[rcx](%0), %%rcx \n\t" /* kills %0 (rcx) */ | |
6aa8b732 | 2458 | #else |
e08aa78a | 2459 | "mov %c[cr2](%0), %%eax \n\t" |
6aa8b732 | 2460 | "mov %%eax, %%cr2 \n\t" |
e08aa78a AK |
2461 | "mov %c[rax](%0), %%eax \n\t" |
2462 | "mov %c[rbx](%0), %%ebx \n\t" | |
2463 | "mov %c[rdx](%0), %%edx \n\t" | |
2464 | "mov %c[rsi](%0), %%esi \n\t" | |
2465 | "mov %c[rdi](%0), %%edi \n\t" | |
2466 | "mov %c[rbp](%0), %%ebp \n\t" | |
2467 | "mov %c[rcx](%0), %%ecx \n\t" /* kills %0 (ecx) */ | |
6aa8b732 AK |
2468 | #endif |
2469 | /* Enter guest mode */ | |
cd2276a7 | 2470 | "jne .Llaunched \n\t" |
6aa8b732 | 2471 | ASM_VMX_VMLAUNCH "\n\t" |
cd2276a7 AK |
2472 | "jmp .Lkvm_vmx_return \n\t" |
2473 | ".Llaunched: " ASM_VMX_VMRESUME "\n\t" | |
2474 | ".Lkvm_vmx_return: " | |
6aa8b732 | 2475 | /* Save guest registers, load host registers, keep flags */ |
05b3e0c2 | 2476 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
2477 | "xchg %0, (%%rsp) \n\t" |
2478 | "mov %%rax, %c[rax](%0) \n\t" | |
2479 | "mov %%rbx, %c[rbx](%0) \n\t" | |
2480 | "pushq (%%rsp); popq %c[rcx](%0) \n\t" | |
2481 | "mov %%rdx, %c[rdx](%0) \n\t" | |
2482 | "mov %%rsi, %c[rsi](%0) \n\t" | |
2483 | "mov %%rdi, %c[rdi](%0) \n\t" | |
2484 | "mov %%rbp, %c[rbp](%0) \n\t" | |
2485 | "mov %%r8, %c[r8](%0) \n\t" | |
2486 | "mov %%r9, %c[r9](%0) \n\t" | |
2487 | "mov %%r10, %c[r10](%0) \n\t" | |
2488 | "mov %%r11, %c[r11](%0) \n\t" | |
2489 | "mov %%r12, %c[r12](%0) \n\t" | |
2490 | "mov %%r13, %c[r13](%0) \n\t" | |
2491 | "mov %%r14, %c[r14](%0) \n\t" | |
2492 | "mov %%r15, %c[r15](%0) \n\t" | |
6aa8b732 | 2493 | "mov %%cr2, %%rax \n\t" |
e08aa78a | 2494 | "mov %%rax, %c[cr2](%0) \n\t" |
6aa8b732 | 2495 | |
e08aa78a | 2496 | "pop %%rbp; pop %%rbp; pop %%rdx \n\t" |
6aa8b732 | 2497 | #else |
e08aa78a AK |
2498 | "xchg %0, (%%esp) \n\t" |
2499 | "mov %%eax, %c[rax](%0) \n\t" | |
2500 | "mov %%ebx, %c[rbx](%0) \n\t" | |
2501 | "pushl (%%esp); popl %c[rcx](%0) \n\t" | |
2502 | "mov %%edx, %c[rdx](%0) \n\t" | |
2503 | "mov %%esi, %c[rsi](%0) \n\t" | |
2504 | "mov %%edi, %c[rdi](%0) \n\t" | |
2505 | "mov %%ebp, %c[rbp](%0) \n\t" | |
6aa8b732 | 2506 | "mov %%cr2, %%eax \n\t" |
e08aa78a | 2507 | "mov %%eax, %c[cr2](%0) \n\t" |
6aa8b732 | 2508 | |
e08aa78a | 2509 | "pop %%ebp; pop %%ebp; pop %%edx \n\t" |
6aa8b732 | 2510 | #endif |
e08aa78a AK |
2511 | "setbe %c[fail](%0) \n\t" |
2512 | : : "c"(vmx), "d"((unsigned long)HOST_RSP), | |
2513 | [launched]"i"(offsetof(struct vcpu_vmx, launched)), | |
2514 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), | |
ad312c7c ZX |
2515 | [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])), |
2516 | [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])), | |
2517 | [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])), | |
2518 | [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])), | |
2519 | [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])), | |
2520 | [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])), | |
2521 | [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])), | |
05b3e0c2 | 2522 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
2523 | [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])), |
2524 | [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])), | |
2525 | [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])), | |
2526 | [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])), | |
2527 | [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])), | |
2528 | [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])), | |
2529 | [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), | |
2530 | [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), | |
6aa8b732 | 2531 | #endif |
ad312c7c | 2532 | [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)) |
c2036300 LV |
2533 | : "cc", "memory" |
2534 | #ifdef CONFIG_X86_64 | |
2535 | , "rbx", "rdi", "rsi" | |
2536 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" | |
ff593e5a LV |
2537 | #else |
2538 | , "ebx", "edi", "rsi" | |
c2036300 LV |
2539 | #endif |
2540 | ); | |
6aa8b732 | 2541 | |
1155f76a | 2542 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
9c8cba37 AK |
2543 | if (vmx->rmode.irq.pending) |
2544 | fixup_rmode_irq(vmx); | |
1155f76a | 2545 | |
ad312c7c | 2546 | vcpu->arch.interrupt_window_open = |
d77c26fc | 2547 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0; |
6aa8b732 | 2548 | |
d77c26fc | 2549 | asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); |
15ad7146 | 2550 | vmx->launched = 1; |
1b6269db AK |
2551 | |
2552 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
2553 | ||
2554 | /* We need to handle NMIs before interrupts are enabled */ | |
2555 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ | |
2556 | asm("int $2"); | |
6aa8b732 AK |
2557 | } |
2558 | ||
6aa8b732 AK |
2559 | static void vmx_free_vmcs(struct kvm_vcpu *vcpu) |
2560 | { | |
a2fa3e9f GH |
2561 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2562 | ||
2563 | if (vmx->vmcs) { | |
8b9cf98c | 2564 | on_each_cpu(__vcpu_clear, vmx, 0, 1); |
a2fa3e9f GH |
2565 | free_vmcs(vmx->vmcs); |
2566 | vmx->vmcs = NULL; | |
6aa8b732 AK |
2567 | } |
2568 | } | |
2569 | ||
2570 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) | |
2571 | { | |
fb3f0f51 RR |
2572 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2573 | ||
2384d2b3 SY |
2574 | spin_lock(&vmx_vpid_lock); |
2575 | if (vmx->vpid != 0) | |
2576 | __clear_bit(vmx->vpid, vmx_vpid_bitmap); | |
2577 | spin_unlock(&vmx_vpid_lock); | |
6aa8b732 | 2578 | vmx_free_vmcs(vcpu); |
fb3f0f51 RR |
2579 | kfree(vmx->host_msrs); |
2580 | kfree(vmx->guest_msrs); | |
2581 | kvm_vcpu_uninit(vcpu); | |
a4770347 | 2582 | kmem_cache_free(kvm_vcpu_cache, vmx); |
6aa8b732 AK |
2583 | } |
2584 | ||
fb3f0f51 | 2585 | static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 2586 | { |
fb3f0f51 | 2587 | int err; |
c16f862d | 2588 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
15ad7146 | 2589 | int cpu; |
6aa8b732 | 2590 | |
a2fa3e9f | 2591 | if (!vmx) |
fb3f0f51 RR |
2592 | return ERR_PTR(-ENOMEM); |
2593 | ||
2384d2b3 SY |
2594 | allocate_vpid(vmx); |
2595 | ||
fb3f0f51 RR |
2596 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
2597 | if (err) | |
2598 | goto free_vcpu; | |
965b58a5 | 2599 | |
a2fa3e9f | 2600 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
fb3f0f51 RR |
2601 | if (!vmx->guest_msrs) { |
2602 | err = -ENOMEM; | |
2603 | goto uninit_vcpu; | |
2604 | } | |
965b58a5 | 2605 | |
a2fa3e9f GH |
2606 | vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
2607 | if (!vmx->host_msrs) | |
fb3f0f51 | 2608 | goto free_guest_msrs; |
965b58a5 | 2609 | |
a2fa3e9f GH |
2610 | vmx->vmcs = alloc_vmcs(); |
2611 | if (!vmx->vmcs) | |
fb3f0f51 | 2612 | goto free_msrs; |
a2fa3e9f GH |
2613 | |
2614 | vmcs_clear(vmx->vmcs); | |
2615 | ||
15ad7146 AK |
2616 | cpu = get_cpu(); |
2617 | vmx_vcpu_load(&vmx->vcpu, cpu); | |
8b9cf98c | 2618 | err = vmx_vcpu_setup(vmx); |
fb3f0f51 | 2619 | vmx_vcpu_put(&vmx->vcpu); |
15ad7146 | 2620 | put_cpu(); |
fb3f0f51 RR |
2621 | if (err) |
2622 | goto free_vmcs; | |
5e4a0b3c MT |
2623 | if (vm_need_virtualize_apic_accesses(kvm)) |
2624 | if (alloc_apic_access_page(kvm) != 0) | |
2625 | goto free_vmcs; | |
fb3f0f51 RR |
2626 | |
2627 | return &vmx->vcpu; | |
2628 | ||
2629 | free_vmcs: | |
2630 | free_vmcs(vmx->vmcs); | |
2631 | free_msrs: | |
2632 | kfree(vmx->host_msrs); | |
2633 | free_guest_msrs: | |
2634 | kfree(vmx->guest_msrs); | |
2635 | uninit_vcpu: | |
2636 | kvm_vcpu_uninit(&vmx->vcpu); | |
2637 | free_vcpu: | |
a4770347 | 2638 | kmem_cache_free(kvm_vcpu_cache, vmx); |
fb3f0f51 | 2639 | return ERR_PTR(err); |
6aa8b732 AK |
2640 | } |
2641 | ||
002c7f7c YS |
2642 | static void __init vmx_check_processor_compat(void *rtn) |
2643 | { | |
2644 | struct vmcs_config vmcs_conf; | |
2645 | ||
2646 | *(int *)rtn = 0; | |
2647 | if (setup_vmcs_config(&vmcs_conf) < 0) | |
2648 | *(int *)rtn = -EIO; | |
2649 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { | |
2650 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", | |
2651 | smp_processor_id()); | |
2652 | *(int *)rtn = -EIO; | |
2653 | } | |
2654 | } | |
2655 | ||
cbdd1bea | 2656 | static struct kvm_x86_ops vmx_x86_ops = { |
6aa8b732 AK |
2657 | .cpu_has_kvm_support = cpu_has_kvm_support, |
2658 | .disabled_by_bios = vmx_disabled_by_bios, | |
2659 | .hardware_setup = hardware_setup, | |
2660 | .hardware_unsetup = hardware_unsetup, | |
002c7f7c | 2661 | .check_processor_compatibility = vmx_check_processor_compat, |
6aa8b732 AK |
2662 | .hardware_enable = hardware_enable, |
2663 | .hardware_disable = hardware_disable, | |
774ead3a | 2664 | .cpu_has_accelerated_tpr = cpu_has_vmx_virtualize_apic_accesses, |
6aa8b732 AK |
2665 | |
2666 | .vcpu_create = vmx_create_vcpu, | |
2667 | .vcpu_free = vmx_free_vcpu, | |
04d2cc77 | 2668 | .vcpu_reset = vmx_vcpu_reset, |
6aa8b732 | 2669 | |
04d2cc77 | 2670 | .prepare_guest_switch = vmx_save_host_state, |
6aa8b732 AK |
2671 | .vcpu_load = vmx_vcpu_load, |
2672 | .vcpu_put = vmx_vcpu_put, | |
774c47f1 | 2673 | .vcpu_decache = vmx_vcpu_decache, |
6aa8b732 AK |
2674 | |
2675 | .set_guest_debug = set_guest_debug, | |
04d2cc77 | 2676 | .guest_debug_pre = kvm_guest_debug_pre, |
6aa8b732 AK |
2677 | .get_msr = vmx_get_msr, |
2678 | .set_msr = vmx_set_msr, | |
2679 | .get_segment_base = vmx_get_segment_base, | |
2680 | .get_segment = vmx_get_segment, | |
2681 | .set_segment = vmx_set_segment, | |
2e4d2653 | 2682 | .get_cpl = vmx_get_cpl, |
6aa8b732 | 2683 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
25c4c276 | 2684 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
6aa8b732 | 2685 | .set_cr0 = vmx_set_cr0, |
6aa8b732 AK |
2686 | .set_cr3 = vmx_set_cr3, |
2687 | .set_cr4 = vmx_set_cr4, | |
6aa8b732 | 2688 | .set_efer = vmx_set_efer, |
6aa8b732 AK |
2689 | .get_idt = vmx_get_idt, |
2690 | .set_idt = vmx_set_idt, | |
2691 | .get_gdt = vmx_get_gdt, | |
2692 | .set_gdt = vmx_set_gdt, | |
2693 | .cache_regs = vcpu_load_rsp_rip, | |
2694 | .decache_regs = vcpu_put_rsp_rip, | |
2695 | .get_rflags = vmx_get_rflags, | |
2696 | .set_rflags = vmx_set_rflags, | |
2697 | ||
2698 | .tlb_flush = vmx_flush_tlb, | |
6aa8b732 | 2699 | |
6aa8b732 | 2700 | .run = vmx_vcpu_run, |
04d2cc77 | 2701 | .handle_exit = kvm_handle_exit, |
6aa8b732 | 2702 | .skip_emulated_instruction = skip_emulated_instruction, |
102d8325 | 2703 | .patch_hypercall = vmx_patch_hypercall, |
2a8067f1 ED |
2704 | .get_irq = vmx_get_irq, |
2705 | .set_irq = vmx_inject_irq, | |
298101da AK |
2706 | .queue_exception = vmx_queue_exception, |
2707 | .exception_injected = vmx_exception_injected, | |
04d2cc77 AK |
2708 | .inject_pending_irq = vmx_intr_assist, |
2709 | .inject_pending_vectors = do_interrupt_requests, | |
cbc94022 IE |
2710 | |
2711 | .set_tss_addr = vmx_set_tss_addr, | |
6aa8b732 AK |
2712 | }; |
2713 | ||
2714 | static int __init vmx_init(void) | |
2715 | { | |
fdef3ad1 HQ |
2716 | void *iova; |
2717 | int r; | |
2718 | ||
2719 | vmx_io_bitmap_a = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); | |
2720 | if (!vmx_io_bitmap_a) | |
2721 | return -ENOMEM; | |
2722 | ||
2723 | vmx_io_bitmap_b = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); | |
2724 | if (!vmx_io_bitmap_b) { | |
2725 | r = -ENOMEM; | |
2726 | goto out; | |
2727 | } | |
2728 | ||
2729 | /* | |
2730 | * Allow direct access to the PC debug port (it is often used for I/O | |
2731 | * delays, but the vmexits simply slow things down). | |
2732 | */ | |
2733 | iova = kmap(vmx_io_bitmap_a); | |
2734 | memset(iova, 0xff, PAGE_SIZE); | |
2735 | clear_bit(0x80, iova); | |
cd0536d7 | 2736 | kunmap(vmx_io_bitmap_a); |
fdef3ad1 HQ |
2737 | |
2738 | iova = kmap(vmx_io_bitmap_b); | |
2739 | memset(iova, 0xff, PAGE_SIZE); | |
cd0536d7 | 2740 | kunmap(vmx_io_bitmap_b); |
fdef3ad1 | 2741 | |
2384d2b3 SY |
2742 | set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */ |
2743 | ||
cb498ea2 | 2744 | r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE); |
fdef3ad1 HQ |
2745 | if (r) |
2746 | goto out1; | |
2747 | ||
c7addb90 AK |
2748 | if (bypass_guest_pf) |
2749 | kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull); | |
2750 | ||
fdef3ad1 HQ |
2751 | return 0; |
2752 | ||
2753 | out1: | |
2754 | __free_page(vmx_io_bitmap_b); | |
2755 | out: | |
2756 | __free_page(vmx_io_bitmap_a); | |
2757 | return r; | |
6aa8b732 AK |
2758 | } |
2759 | ||
2760 | static void __exit vmx_exit(void) | |
2761 | { | |
fdef3ad1 HQ |
2762 | __free_page(vmx_io_bitmap_b); |
2763 | __free_page(vmx_io_bitmap_a); | |
2764 | ||
cb498ea2 | 2765 | kvm_exit(); |
6aa8b732 AK |
2766 | } |
2767 | ||
2768 | module_init(vmx_init) | |
2769 | module_exit(vmx_exit) |