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" |
1d737c8a | 19 | #include "mmu.h" |
e495606d | 20 | |
edf88417 | 21 | #include <linux/kvm_host.h> |
6aa8b732 | 22 | #include <linux/module.h> |
9d8f549d | 23 | #include <linux/kernel.h> |
6aa8b732 AK |
24 | #include <linux/mm.h> |
25 | #include <linux/highmem.h> | |
e8edc6e0 | 26 | #include <linux/sched.h> |
c7addb90 | 27 | #include <linux/moduleparam.h> |
229456fc | 28 | #include <linux/ftrace_event.h> |
5fdbf976 | 29 | #include "kvm_cache_regs.h" |
35920a35 | 30 | #include "x86.h" |
e495606d | 31 | |
6aa8b732 | 32 | #include <asm/io.h> |
3b3be0d1 | 33 | #include <asm/desc.h> |
13673a90 | 34 | #include <asm/vmx.h> |
6210e37b | 35 | #include <asm/virtext.h> |
a0861c02 | 36 | #include <asm/mce.h> |
6aa8b732 | 37 | |
229456fc MT |
38 | #include "trace.h" |
39 | ||
4ecac3fd AK |
40 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
41 | ||
6aa8b732 AK |
42 | MODULE_AUTHOR("Qumranet"); |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
4462d21a | 45 | static int __read_mostly bypass_guest_pf = 1; |
c1f8bc04 | 46 | module_param(bypass_guest_pf, bool, S_IRUGO); |
c7addb90 | 47 | |
4462d21a | 48 | static int __read_mostly enable_vpid = 1; |
736caefe | 49 | module_param_named(vpid, enable_vpid, bool, 0444); |
2384d2b3 | 50 | |
4462d21a | 51 | static int __read_mostly flexpriority_enabled = 1; |
736caefe | 52 | module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO); |
4c9fc8ef | 53 | |
4462d21a | 54 | static int __read_mostly enable_ept = 1; |
736caefe | 55 | module_param_named(ept, enable_ept, bool, S_IRUGO); |
d56f546d | 56 | |
3a624e29 NK |
57 | static int __read_mostly enable_unrestricted_guest = 1; |
58 | module_param_named(unrestricted_guest, | |
59 | enable_unrestricted_guest, bool, S_IRUGO); | |
60 | ||
4462d21a | 61 | static int __read_mostly emulate_invalid_guest_state = 0; |
c1f8bc04 | 62 | module_param(emulate_invalid_guest_state, bool, S_IRUGO); |
04fa4d32 | 63 | |
4b8d54f9 ZE |
64 | /* |
65 | * These 2 parameters are used to config the controls for Pause-Loop Exiting: | |
66 | * ple_gap: upper bound on the amount of time between two successive | |
67 | * executions of PAUSE in a loop. Also indicate if ple enabled. | |
68 | * According to test, this time is usually small than 41 cycles. | |
69 | * ple_window: upper bound on the amount of time a guest is allowed to execute | |
70 | * in a PAUSE loop. Tests indicate that most spinlocks are held for | |
71 | * less than 2^12 cycles | |
72 | * Time is measured based on a counter that runs at the same rate as the TSC, | |
73 | * refer SDM volume 3b section 21.6.13 & 22.1.3. | |
74 | */ | |
75 | #define KVM_VMX_DEFAULT_PLE_GAP 41 | |
76 | #define KVM_VMX_DEFAULT_PLE_WINDOW 4096 | |
77 | static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP; | |
78 | module_param(ple_gap, int, S_IRUGO); | |
79 | ||
80 | static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW; | |
81 | module_param(ple_window, int, S_IRUGO); | |
82 | ||
a2fa3e9f GH |
83 | struct vmcs { |
84 | u32 revision_id; | |
85 | u32 abort; | |
86 | char data[0]; | |
87 | }; | |
88 | ||
26bb0981 AK |
89 | struct shared_msr_entry { |
90 | unsigned index; | |
91 | u64 data; | |
92 | }; | |
93 | ||
a2fa3e9f | 94 | struct vcpu_vmx { |
fb3f0f51 | 95 | struct kvm_vcpu vcpu; |
543e4243 | 96 | struct list_head local_vcpus_link; |
313dbd49 | 97 | unsigned long host_rsp; |
a2fa3e9f | 98 | int launched; |
29bd8a78 | 99 | u8 fail; |
1155f76a | 100 | u32 idt_vectoring_info; |
26bb0981 | 101 | struct shared_msr_entry *guest_msrs; |
a2fa3e9f GH |
102 | int nmsrs; |
103 | int save_nmsrs; | |
104 | int msr_offset_efer; | |
105 | #ifdef CONFIG_X86_64 | |
44ea2b17 AK |
106 | u64 msr_host_kernel_gs_base; |
107 | u64 msr_guest_kernel_gs_base; | |
a2fa3e9f GH |
108 | #endif |
109 | struct vmcs *vmcs; | |
110 | struct { | |
111 | int loaded; | |
112 | u16 fs_sel, gs_sel, ldt_sel; | |
152d3f2f LV |
113 | int gs_ldt_reload_needed; |
114 | int fs_reload_needed; | |
d77c26fc | 115 | } host_state; |
9c8cba37 | 116 | struct { |
7ffd92c5 AK |
117 | int vm86_active; |
118 | u8 save_iopl; | |
119 | struct kvm_save_segment { | |
120 | u16 selector; | |
121 | unsigned long base; | |
122 | u32 limit; | |
123 | u32 ar; | |
124 | } tr, es, ds, fs, gs; | |
9c8cba37 AK |
125 | struct { |
126 | bool pending; | |
127 | u8 vector; | |
128 | unsigned rip; | |
129 | } irq; | |
130 | } rmode; | |
2384d2b3 | 131 | int vpid; |
04fa4d32 | 132 | bool emulation_required; |
3b86cd99 JK |
133 | |
134 | /* Support for vnmi-less CPUs */ | |
135 | int soft_vnmi_blocked; | |
136 | ktime_t entry_time; | |
137 | s64 vnmi_blocked_time; | |
a0861c02 | 138 | u32 exit_reason; |
a2fa3e9f GH |
139 | }; |
140 | ||
141 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) | |
142 | { | |
fb3f0f51 | 143 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
a2fa3e9f GH |
144 | } |
145 | ||
b7ebfb05 | 146 | static int init_rmode(struct kvm *kvm); |
4e1096d2 | 147 | static u64 construct_eptp(unsigned long root_hpa); |
75880a01 | 148 | |
6aa8b732 AK |
149 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
150 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); | |
543e4243 | 151 | static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu); |
6aa8b732 | 152 | |
3e7c73e9 AK |
153 | static unsigned long *vmx_io_bitmap_a; |
154 | static unsigned long *vmx_io_bitmap_b; | |
5897297b AK |
155 | static unsigned long *vmx_msr_bitmap_legacy; |
156 | static unsigned long *vmx_msr_bitmap_longmode; | |
fdef3ad1 | 157 | |
2384d2b3 SY |
158 | static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS); |
159 | static DEFINE_SPINLOCK(vmx_vpid_lock); | |
160 | ||
1c3d14fe | 161 | static struct vmcs_config { |
6aa8b732 AK |
162 | int size; |
163 | int order; | |
164 | u32 revision_id; | |
1c3d14fe YS |
165 | u32 pin_based_exec_ctrl; |
166 | u32 cpu_based_exec_ctrl; | |
f78e0e2e | 167 | u32 cpu_based_2nd_exec_ctrl; |
1c3d14fe YS |
168 | u32 vmexit_ctrl; |
169 | u32 vmentry_ctrl; | |
170 | } vmcs_config; | |
6aa8b732 | 171 | |
efff9e53 | 172 | static struct vmx_capability { |
d56f546d SY |
173 | u32 ept; |
174 | u32 vpid; | |
175 | } vmx_capability; | |
176 | ||
6aa8b732 AK |
177 | #define VMX_SEGMENT_FIELD(seg) \ |
178 | [VCPU_SREG_##seg] = { \ | |
179 | .selector = GUEST_##seg##_SELECTOR, \ | |
180 | .base = GUEST_##seg##_BASE, \ | |
181 | .limit = GUEST_##seg##_LIMIT, \ | |
182 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ | |
183 | } | |
184 | ||
185 | static struct kvm_vmx_segment_field { | |
186 | unsigned selector; | |
187 | unsigned base; | |
188 | unsigned limit; | |
189 | unsigned ar_bytes; | |
190 | } kvm_vmx_segment_fields[] = { | |
191 | VMX_SEGMENT_FIELD(CS), | |
192 | VMX_SEGMENT_FIELD(DS), | |
193 | VMX_SEGMENT_FIELD(ES), | |
194 | VMX_SEGMENT_FIELD(FS), | |
195 | VMX_SEGMENT_FIELD(GS), | |
196 | VMX_SEGMENT_FIELD(SS), | |
197 | VMX_SEGMENT_FIELD(TR), | |
198 | VMX_SEGMENT_FIELD(LDTR), | |
199 | }; | |
200 | ||
26bb0981 AK |
201 | static u64 host_efer; |
202 | ||
6de4f3ad AK |
203 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu); |
204 | ||
4d56c8a7 AK |
205 | /* |
206 | * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it | |
207 | * away by decrementing the array size. | |
208 | */ | |
6aa8b732 | 209 | static const u32 vmx_msr_index[] = { |
05b3e0c2 | 210 | #ifdef CONFIG_X86_64 |
44ea2b17 | 211 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, |
6aa8b732 AK |
212 | #endif |
213 | MSR_EFER, MSR_K6_STAR, | |
214 | }; | |
9d8f549d | 215 | #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) |
6aa8b732 | 216 | |
6aa8b732 AK |
217 | static inline int is_page_fault(u32 intr_info) |
218 | { | |
219 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
220 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 221 | (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); |
6aa8b732 AK |
222 | } |
223 | ||
2ab455cc AL |
224 | static inline int is_no_device(u32 intr_info) |
225 | { | |
226 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
227 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 228 | (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); |
2ab455cc AL |
229 | } |
230 | ||
7aa81cc0 AL |
231 | static inline int is_invalid_opcode(u32 intr_info) |
232 | { | |
233 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
234 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 235 | (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); |
7aa81cc0 AL |
236 | } |
237 | ||
6aa8b732 AK |
238 | static inline int is_external_interrupt(u32 intr_info) |
239 | { | |
240 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
241 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); | |
242 | } | |
243 | ||
a0861c02 AK |
244 | static inline int is_machine_check(u32 intr_info) |
245 | { | |
246 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
247 | INTR_INFO_VALID_MASK)) == | |
248 | (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK); | |
249 | } | |
250 | ||
25c5f225 SY |
251 | static inline int cpu_has_vmx_msr_bitmap(void) |
252 | { | |
04547156 | 253 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS; |
25c5f225 SY |
254 | } |
255 | ||
6e5d865c YS |
256 | static inline int cpu_has_vmx_tpr_shadow(void) |
257 | { | |
04547156 | 258 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW; |
6e5d865c YS |
259 | } |
260 | ||
261 | static inline int vm_need_tpr_shadow(struct kvm *kvm) | |
262 | { | |
04547156 | 263 | return (cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm)); |
6e5d865c YS |
264 | } |
265 | ||
f78e0e2e SY |
266 | static inline int cpu_has_secondary_exec_ctrls(void) |
267 | { | |
04547156 SY |
268 | return vmcs_config.cpu_based_exec_ctrl & |
269 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; | |
f78e0e2e SY |
270 | } |
271 | ||
774ead3a | 272 | static inline bool cpu_has_vmx_virtualize_apic_accesses(void) |
f78e0e2e | 273 | { |
04547156 SY |
274 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
275 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
276 | } | |
277 | ||
278 | static inline bool cpu_has_vmx_flexpriority(void) | |
279 | { | |
280 | return cpu_has_vmx_tpr_shadow() && | |
281 | cpu_has_vmx_virtualize_apic_accesses(); | |
f78e0e2e SY |
282 | } |
283 | ||
e799794e MT |
284 | static inline bool cpu_has_vmx_ept_execute_only(void) |
285 | { | |
286 | return !!(vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT); | |
287 | } | |
288 | ||
289 | static inline bool cpu_has_vmx_eptp_uncacheable(void) | |
290 | { | |
291 | return !!(vmx_capability.ept & VMX_EPTP_UC_BIT); | |
292 | } | |
293 | ||
294 | static inline bool cpu_has_vmx_eptp_writeback(void) | |
295 | { | |
296 | return !!(vmx_capability.ept & VMX_EPTP_WB_BIT); | |
297 | } | |
298 | ||
299 | static inline bool cpu_has_vmx_ept_2m_page(void) | |
300 | { | |
301 | return !!(vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT); | |
302 | } | |
303 | ||
d56f546d SY |
304 | static inline int cpu_has_vmx_invept_individual_addr(void) |
305 | { | |
04547156 | 306 | return !!(vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT); |
d56f546d SY |
307 | } |
308 | ||
309 | static inline int cpu_has_vmx_invept_context(void) | |
310 | { | |
04547156 | 311 | return !!(vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT); |
d56f546d SY |
312 | } |
313 | ||
314 | static inline int cpu_has_vmx_invept_global(void) | |
315 | { | |
04547156 | 316 | return !!(vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT); |
d56f546d SY |
317 | } |
318 | ||
319 | static inline int cpu_has_vmx_ept(void) | |
320 | { | |
04547156 SY |
321 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
322 | SECONDARY_EXEC_ENABLE_EPT; | |
d56f546d SY |
323 | } |
324 | ||
3a624e29 NK |
325 | static inline int cpu_has_vmx_unrestricted_guest(void) |
326 | { | |
327 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
328 | SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
329 | } | |
330 | ||
4b8d54f9 ZE |
331 | static inline int cpu_has_vmx_ple(void) |
332 | { | |
333 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
334 | SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
335 | } | |
336 | ||
f78e0e2e SY |
337 | static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm) |
338 | { | |
04547156 SY |
339 | return flexpriority_enabled && |
340 | (cpu_has_vmx_virtualize_apic_accesses()) && | |
341 | (irqchip_in_kernel(kvm)); | |
f78e0e2e SY |
342 | } |
343 | ||
2384d2b3 SY |
344 | static inline int cpu_has_vmx_vpid(void) |
345 | { | |
04547156 SY |
346 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
347 | SECONDARY_EXEC_ENABLE_VPID; | |
2384d2b3 SY |
348 | } |
349 | ||
f08864b4 SY |
350 | static inline int cpu_has_virtual_nmis(void) |
351 | { | |
352 | return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS; | |
353 | } | |
354 | ||
04547156 SY |
355 | static inline bool report_flexpriority(void) |
356 | { | |
357 | return flexpriority_enabled; | |
358 | } | |
359 | ||
8b9cf98c | 360 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
7725f0ba AK |
361 | { |
362 | int i; | |
363 | ||
a2fa3e9f | 364 | for (i = 0; i < vmx->nmsrs; ++i) |
26bb0981 | 365 | if (vmx_msr_index[vmx->guest_msrs[i].index] == msr) |
a75beee6 ED |
366 | return i; |
367 | return -1; | |
368 | } | |
369 | ||
2384d2b3 SY |
370 | static inline void __invvpid(int ext, u16 vpid, gva_t gva) |
371 | { | |
372 | struct { | |
373 | u64 vpid : 16; | |
374 | u64 rsvd : 48; | |
375 | u64 gva; | |
376 | } operand = { vpid, 0, gva }; | |
377 | ||
4ecac3fd | 378 | asm volatile (__ex(ASM_VMX_INVVPID) |
2384d2b3 SY |
379 | /* CF==1 or ZF==1 --> rc = -1 */ |
380 | "; ja 1f ; ud2 ; 1:" | |
381 | : : "a"(&operand), "c"(ext) : "cc", "memory"); | |
382 | } | |
383 | ||
1439442c SY |
384 | static inline void __invept(int ext, u64 eptp, gpa_t gpa) |
385 | { | |
386 | struct { | |
387 | u64 eptp, gpa; | |
388 | } operand = {eptp, gpa}; | |
389 | ||
4ecac3fd | 390 | asm volatile (__ex(ASM_VMX_INVEPT) |
1439442c SY |
391 | /* CF==1 or ZF==1 --> rc = -1 */ |
392 | "; ja 1f ; ud2 ; 1:\n" | |
393 | : : "a" (&operand), "c" (ext) : "cc", "memory"); | |
394 | } | |
395 | ||
26bb0981 | 396 | static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr) |
a75beee6 ED |
397 | { |
398 | int i; | |
399 | ||
8b9cf98c | 400 | i = __find_msr_index(vmx, msr); |
a75beee6 | 401 | if (i >= 0) |
a2fa3e9f | 402 | return &vmx->guest_msrs[i]; |
8b6d44c7 | 403 | return NULL; |
7725f0ba AK |
404 | } |
405 | ||
6aa8b732 AK |
406 | static void vmcs_clear(struct vmcs *vmcs) |
407 | { | |
408 | u64 phys_addr = __pa(vmcs); | |
409 | u8 error; | |
410 | ||
4ecac3fd | 411 | asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0" |
6aa8b732 AK |
412 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
413 | : "cc", "memory"); | |
414 | if (error) | |
415 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", | |
416 | vmcs, phys_addr); | |
417 | } | |
418 | ||
419 | static void __vcpu_clear(void *arg) | |
420 | { | |
8b9cf98c | 421 | struct vcpu_vmx *vmx = arg; |
d3b2c338 | 422 | int cpu = raw_smp_processor_id(); |
6aa8b732 | 423 | |
8b9cf98c | 424 | if (vmx->vcpu.cpu == cpu) |
a2fa3e9f GH |
425 | vmcs_clear(vmx->vmcs); |
426 | if (per_cpu(current_vmcs, cpu) == vmx->vmcs) | |
6aa8b732 | 427 | per_cpu(current_vmcs, cpu) = NULL; |
ad312c7c | 428 | rdtscll(vmx->vcpu.arch.host_tsc); |
543e4243 AK |
429 | list_del(&vmx->local_vcpus_link); |
430 | vmx->vcpu.cpu = -1; | |
431 | vmx->launched = 0; | |
6aa8b732 AK |
432 | } |
433 | ||
8b9cf98c | 434 | static void vcpu_clear(struct vcpu_vmx *vmx) |
8d0be2b3 | 435 | { |
eae5ecb5 AK |
436 | if (vmx->vcpu.cpu == -1) |
437 | return; | |
8691e5a8 | 438 | smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1); |
8d0be2b3 AK |
439 | } |
440 | ||
2384d2b3 SY |
441 | static inline void vpid_sync_vcpu_all(struct vcpu_vmx *vmx) |
442 | { | |
443 | if (vmx->vpid == 0) | |
444 | return; | |
445 | ||
446 | __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0); | |
447 | } | |
448 | ||
1439442c SY |
449 | static inline void ept_sync_global(void) |
450 | { | |
451 | if (cpu_has_vmx_invept_global()) | |
452 | __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0); | |
453 | } | |
454 | ||
455 | static inline void ept_sync_context(u64 eptp) | |
456 | { | |
089d034e | 457 | if (enable_ept) { |
1439442c SY |
458 | if (cpu_has_vmx_invept_context()) |
459 | __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0); | |
460 | else | |
461 | ept_sync_global(); | |
462 | } | |
463 | } | |
464 | ||
465 | static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa) | |
466 | { | |
089d034e | 467 | if (enable_ept) { |
1439442c SY |
468 | if (cpu_has_vmx_invept_individual_addr()) |
469 | __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR, | |
470 | eptp, gpa); | |
471 | else | |
472 | ept_sync_context(eptp); | |
473 | } | |
474 | } | |
475 | ||
6aa8b732 AK |
476 | static unsigned long vmcs_readl(unsigned long field) |
477 | { | |
478 | unsigned long value; | |
479 | ||
4ecac3fd | 480 | asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX) |
6aa8b732 AK |
481 | : "=a"(value) : "d"(field) : "cc"); |
482 | return value; | |
483 | } | |
484 | ||
485 | static u16 vmcs_read16(unsigned long field) | |
486 | { | |
487 | return vmcs_readl(field); | |
488 | } | |
489 | ||
490 | static u32 vmcs_read32(unsigned long field) | |
491 | { | |
492 | return vmcs_readl(field); | |
493 | } | |
494 | ||
495 | static u64 vmcs_read64(unsigned long field) | |
496 | { | |
05b3e0c2 | 497 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
498 | return vmcs_readl(field); |
499 | #else | |
500 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); | |
501 | #endif | |
502 | } | |
503 | ||
e52de1b8 AK |
504 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
505 | { | |
506 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", | |
507 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); | |
508 | dump_stack(); | |
509 | } | |
510 | ||
6aa8b732 AK |
511 | static void vmcs_writel(unsigned long field, unsigned long value) |
512 | { | |
513 | u8 error; | |
514 | ||
4ecac3fd | 515 | asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0" |
d77c26fc | 516 | : "=q"(error) : "a"(value), "d"(field) : "cc"); |
e52de1b8 AK |
517 | if (unlikely(error)) |
518 | vmwrite_error(field, value); | |
6aa8b732 AK |
519 | } |
520 | ||
521 | static void vmcs_write16(unsigned long field, u16 value) | |
522 | { | |
523 | vmcs_writel(field, value); | |
524 | } | |
525 | ||
526 | static void vmcs_write32(unsigned long field, u32 value) | |
527 | { | |
528 | vmcs_writel(field, value); | |
529 | } | |
530 | ||
531 | static void vmcs_write64(unsigned long field, u64 value) | |
532 | { | |
6aa8b732 | 533 | vmcs_writel(field, value); |
7682f2d0 | 534 | #ifndef CONFIG_X86_64 |
6aa8b732 AK |
535 | asm volatile (""); |
536 | vmcs_writel(field+1, value >> 32); | |
537 | #endif | |
538 | } | |
539 | ||
2ab455cc AL |
540 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
541 | { | |
542 | vmcs_writel(field, vmcs_readl(field) & ~mask); | |
543 | } | |
544 | ||
545 | static void vmcs_set_bits(unsigned long field, u32 mask) | |
546 | { | |
547 | vmcs_writel(field, vmcs_readl(field) | mask); | |
548 | } | |
549 | ||
abd3f2d6 AK |
550 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
551 | { | |
552 | u32 eb; | |
553 | ||
a0861c02 | 554 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR); |
abd3f2d6 AK |
555 | if (!vcpu->fpu_active) |
556 | eb |= 1u << NM_VECTOR; | |
e8a48342 AK |
557 | /* |
558 | * Unconditionally intercept #DB so we can maintain dr6 without | |
559 | * reading it every exit. | |
560 | */ | |
561 | eb |= 1u << DB_VECTOR; | |
d0bfb940 | 562 | if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) { |
d0bfb940 JK |
563 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) |
564 | eb |= 1u << BP_VECTOR; | |
565 | } | |
7ffd92c5 | 566 | if (to_vmx(vcpu)->rmode.vm86_active) |
abd3f2d6 | 567 | eb = ~0; |
089d034e | 568 | if (enable_ept) |
1439442c | 569 | eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */ |
abd3f2d6 AK |
570 | vmcs_write32(EXCEPTION_BITMAP, eb); |
571 | } | |
572 | ||
33ed6329 AK |
573 | static void reload_tss(void) |
574 | { | |
33ed6329 AK |
575 | /* |
576 | * VT restores TR but not its size. Useless. | |
577 | */ | |
578 | struct descriptor_table gdt; | |
a5f61300 | 579 | struct desc_struct *descs; |
33ed6329 | 580 | |
d6e88aec | 581 | kvm_get_gdt(&gdt); |
33ed6329 AK |
582 | descs = (void *)gdt.base; |
583 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ | |
584 | load_TR_desc(); | |
33ed6329 AK |
585 | } |
586 | ||
26bb0981 | 587 | static bool update_transition_efer(struct vcpu_vmx *vmx) |
2cc51560 | 588 | { |
a2fa3e9f | 589 | int efer_offset = vmx->msr_offset_efer; |
3a34a881 | 590 | u64 guest_efer; |
51c6cf66 AK |
591 | u64 ignore_bits; |
592 | ||
593 | if (efer_offset < 0) | |
26bb0981 AK |
594 | return false; |
595 | guest_efer = vmx->vcpu.arch.shadow_efer; | |
3a34a881 | 596 | |
51c6cf66 AK |
597 | /* |
598 | * NX is emulated; LMA and LME handled by hardware; SCE meaninless | |
599 | * outside long mode | |
600 | */ | |
601 | ignore_bits = EFER_NX | EFER_SCE; | |
602 | #ifdef CONFIG_X86_64 | |
603 | ignore_bits |= EFER_LMA | EFER_LME; | |
604 | /* SCE is meaningful only in long mode on Intel */ | |
605 | if (guest_efer & EFER_LMA) | |
606 | ignore_bits &= ~(u64)EFER_SCE; | |
607 | #endif | |
608 | if ((guest_efer & ~ignore_bits) == (host_efer & ~ignore_bits)) | |
26bb0981 | 609 | return false; |
2cc51560 | 610 | |
51c6cf66 AK |
611 | guest_efer &= ~ignore_bits; |
612 | guest_efer |= host_efer & ignore_bits; | |
26bb0981 AK |
613 | vmx->guest_msrs[efer_offset].data = guest_efer; |
614 | return true; | |
51c6cf66 AK |
615 | } |
616 | ||
04d2cc77 | 617 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
33ed6329 | 618 | { |
04d2cc77 | 619 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 620 | int i; |
04d2cc77 | 621 | |
a2fa3e9f | 622 | if (vmx->host_state.loaded) |
33ed6329 AK |
623 | return; |
624 | ||
a2fa3e9f | 625 | vmx->host_state.loaded = 1; |
33ed6329 AK |
626 | /* |
627 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not | |
628 | * allow segment selectors with cpl > 0 or ti == 1. | |
629 | */ | |
d6e88aec | 630 | vmx->host_state.ldt_sel = kvm_read_ldt(); |
152d3f2f | 631 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
d6e88aec | 632 | vmx->host_state.fs_sel = kvm_read_fs(); |
152d3f2f | 633 | if (!(vmx->host_state.fs_sel & 7)) { |
a2fa3e9f | 634 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
152d3f2f LV |
635 | vmx->host_state.fs_reload_needed = 0; |
636 | } else { | |
33ed6329 | 637 | vmcs_write16(HOST_FS_SELECTOR, 0); |
152d3f2f | 638 | vmx->host_state.fs_reload_needed = 1; |
33ed6329 | 639 | } |
d6e88aec | 640 | vmx->host_state.gs_sel = kvm_read_gs(); |
a2fa3e9f GH |
641 | if (!(vmx->host_state.gs_sel & 7)) |
642 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); | |
33ed6329 AK |
643 | else { |
644 | vmcs_write16(HOST_GS_SELECTOR, 0); | |
152d3f2f | 645 | vmx->host_state.gs_ldt_reload_needed = 1; |
33ed6329 AK |
646 | } |
647 | ||
648 | #ifdef CONFIG_X86_64 | |
649 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); | |
650 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); | |
651 | #else | |
a2fa3e9f GH |
652 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
653 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); | |
33ed6329 | 654 | #endif |
707c0874 AK |
655 | |
656 | #ifdef CONFIG_X86_64 | |
44ea2b17 AK |
657 | if (is_long_mode(&vmx->vcpu)) { |
658 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); | |
659 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); | |
660 | } | |
707c0874 | 661 | #endif |
26bb0981 AK |
662 | for (i = 0; i < vmx->save_nmsrs; ++i) |
663 | kvm_set_shared_msr(vmx->guest_msrs[i].index, | |
664 | vmx->guest_msrs[i].data); | |
33ed6329 AK |
665 | } |
666 | ||
a9b21b62 | 667 | static void __vmx_load_host_state(struct vcpu_vmx *vmx) |
33ed6329 | 668 | { |
15ad7146 | 669 | unsigned long flags; |
33ed6329 | 670 | |
a2fa3e9f | 671 | if (!vmx->host_state.loaded) |
33ed6329 AK |
672 | return; |
673 | ||
e1beb1d3 | 674 | ++vmx->vcpu.stat.host_state_reload; |
a2fa3e9f | 675 | vmx->host_state.loaded = 0; |
152d3f2f | 676 | if (vmx->host_state.fs_reload_needed) |
d6e88aec | 677 | kvm_load_fs(vmx->host_state.fs_sel); |
152d3f2f | 678 | if (vmx->host_state.gs_ldt_reload_needed) { |
d6e88aec | 679 | kvm_load_ldt(vmx->host_state.ldt_sel); |
33ed6329 AK |
680 | /* |
681 | * If we have to reload gs, we must take care to | |
682 | * preserve our gs base. | |
683 | */ | |
15ad7146 | 684 | local_irq_save(flags); |
d6e88aec | 685 | kvm_load_gs(vmx->host_state.gs_sel); |
33ed6329 AK |
686 | #ifdef CONFIG_X86_64 |
687 | wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE)); | |
688 | #endif | |
15ad7146 | 689 | local_irq_restore(flags); |
33ed6329 | 690 | } |
152d3f2f | 691 | reload_tss(); |
44ea2b17 AK |
692 | #ifdef CONFIG_X86_64 |
693 | if (is_long_mode(&vmx->vcpu)) { | |
694 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); | |
695 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); | |
696 | } | |
697 | #endif | |
33ed6329 AK |
698 | } |
699 | ||
a9b21b62 AK |
700 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
701 | { | |
702 | preempt_disable(); | |
703 | __vmx_load_host_state(vmx); | |
704 | preempt_enable(); | |
705 | } | |
706 | ||
6aa8b732 AK |
707 | /* |
708 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes | |
709 | * vcpu mutex is already taken. | |
710 | */ | |
15ad7146 | 711 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 712 | { |
a2fa3e9f GH |
713 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
714 | u64 phys_addr = __pa(vmx->vmcs); | |
019960ae | 715 | u64 tsc_this, delta, new_offset; |
6aa8b732 | 716 | |
a3d7f85f | 717 | if (vcpu->cpu != cpu) { |
8b9cf98c | 718 | vcpu_clear(vmx); |
2f599714 | 719 | kvm_migrate_timers(vcpu); |
eb5109e3 | 720 | set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests); |
543e4243 AK |
721 | local_irq_disable(); |
722 | list_add(&vmx->local_vcpus_link, | |
723 | &per_cpu(vcpus_on_cpu, cpu)); | |
724 | local_irq_enable(); | |
a3d7f85f | 725 | } |
6aa8b732 | 726 | |
a2fa3e9f | 727 | if (per_cpu(current_vmcs, cpu) != vmx->vmcs) { |
6aa8b732 AK |
728 | u8 error; |
729 | ||
a2fa3e9f | 730 | per_cpu(current_vmcs, cpu) = vmx->vmcs; |
4ecac3fd | 731 | asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0" |
6aa8b732 AK |
732 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
733 | : "cc"); | |
734 | if (error) | |
735 | printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n", | |
a2fa3e9f | 736 | vmx->vmcs, phys_addr); |
6aa8b732 AK |
737 | } |
738 | ||
739 | if (vcpu->cpu != cpu) { | |
740 | struct descriptor_table dt; | |
741 | unsigned long sysenter_esp; | |
742 | ||
743 | vcpu->cpu = cpu; | |
744 | /* | |
745 | * Linux uses per-cpu TSS and GDT, so set these when switching | |
746 | * processors. | |
747 | */ | |
d6e88aec AK |
748 | vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */ |
749 | kvm_get_gdt(&dt); | |
6aa8b732 AK |
750 | vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */ |
751 | ||
752 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); | |
753 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ | |
7700270e AK |
754 | |
755 | /* | |
756 | * Make sure the time stamp counter is monotonous. | |
757 | */ | |
758 | rdtscll(tsc_this); | |
019960ae AK |
759 | if (tsc_this < vcpu->arch.host_tsc) { |
760 | delta = vcpu->arch.host_tsc - tsc_this; | |
761 | new_offset = vmcs_read64(TSC_OFFSET) + delta; | |
762 | vmcs_write64(TSC_OFFSET, new_offset); | |
763 | } | |
6aa8b732 | 764 | } |
6aa8b732 AK |
765 | } |
766 | ||
767 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) | |
768 | { | |
a9b21b62 | 769 | __vmx_load_host_state(to_vmx(vcpu)); |
6aa8b732 AK |
770 | } |
771 | ||
5fd86fcf AK |
772 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
773 | { | |
774 | if (vcpu->fpu_active) | |
775 | return; | |
776 | vcpu->fpu_active = 1; | |
707d92fa | 777 | vmcs_clear_bits(GUEST_CR0, X86_CR0_TS); |
ad312c7c | 778 | if (vcpu->arch.cr0 & X86_CR0_TS) |
707d92fa | 779 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
5fd86fcf AK |
780 | update_exception_bitmap(vcpu); |
781 | } | |
782 | ||
783 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) | |
784 | { | |
785 | if (!vcpu->fpu_active) | |
786 | return; | |
787 | vcpu->fpu_active = 0; | |
707d92fa | 788 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
5fd86fcf AK |
789 | update_exception_bitmap(vcpu); |
790 | } | |
791 | ||
6aa8b732 AK |
792 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
793 | { | |
345dcaa8 AK |
794 | unsigned long rflags; |
795 | ||
796 | rflags = vmcs_readl(GUEST_RFLAGS); | |
797 | if (to_vmx(vcpu)->rmode.vm86_active) | |
798 | rflags &= ~(unsigned long)(X86_EFLAGS_IOPL | X86_EFLAGS_VM); | |
799 | return rflags; | |
6aa8b732 AK |
800 | } |
801 | ||
802 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
803 | { | |
7ffd92c5 | 804 | if (to_vmx(vcpu)->rmode.vm86_active) |
053de044 | 805 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
806 | vmcs_writel(GUEST_RFLAGS, rflags); |
807 | } | |
808 | ||
2809f5d2 GC |
809 | static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) |
810 | { | |
811 | u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
812 | int ret = 0; | |
813 | ||
814 | if (interruptibility & GUEST_INTR_STATE_STI) | |
815 | ret |= X86_SHADOW_INT_STI; | |
816 | if (interruptibility & GUEST_INTR_STATE_MOV_SS) | |
817 | ret |= X86_SHADOW_INT_MOV_SS; | |
818 | ||
819 | return ret & mask; | |
820 | } | |
821 | ||
822 | static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
823 | { | |
824 | u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
825 | u32 interruptibility = interruptibility_old; | |
826 | ||
827 | interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS); | |
828 | ||
829 | if (mask & X86_SHADOW_INT_MOV_SS) | |
830 | interruptibility |= GUEST_INTR_STATE_MOV_SS; | |
831 | if (mask & X86_SHADOW_INT_STI) | |
832 | interruptibility |= GUEST_INTR_STATE_STI; | |
833 | ||
834 | if ((interruptibility != interruptibility_old)) | |
835 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility); | |
836 | } | |
837 | ||
6aa8b732 AK |
838 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
839 | { | |
840 | unsigned long rip; | |
6aa8b732 | 841 | |
5fdbf976 | 842 | rip = kvm_rip_read(vcpu); |
6aa8b732 | 843 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
5fdbf976 | 844 | kvm_rip_write(vcpu, rip); |
6aa8b732 | 845 | |
2809f5d2 GC |
846 | /* skipping an emulated instruction also counts */ |
847 | vmx_set_interrupt_shadow(vcpu, 0); | |
6aa8b732 AK |
848 | } |
849 | ||
298101da AK |
850 | static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
851 | bool has_error_code, u32 error_code) | |
852 | { | |
77ab6db0 | 853 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
8ab2d2e2 | 854 | u32 intr_info = nr | INTR_INFO_VALID_MASK; |
77ab6db0 | 855 | |
8ab2d2e2 | 856 | if (has_error_code) { |
77ab6db0 | 857 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); |
8ab2d2e2 JK |
858 | intr_info |= INTR_INFO_DELIVER_CODE_MASK; |
859 | } | |
77ab6db0 | 860 | |
7ffd92c5 | 861 | if (vmx->rmode.vm86_active) { |
77ab6db0 JK |
862 | vmx->rmode.irq.pending = true; |
863 | vmx->rmode.irq.vector = nr; | |
864 | vmx->rmode.irq.rip = kvm_rip_read(vcpu); | |
ae0bb3e0 GN |
865 | if (kvm_exception_is_soft(nr)) |
866 | vmx->rmode.irq.rip += | |
867 | vmx->vcpu.arch.event_exit_inst_len; | |
8ab2d2e2 JK |
868 | intr_info |= INTR_TYPE_SOFT_INTR; |
869 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info); | |
77ab6db0 JK |
870 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1); |
871 | kvm_rip_write(vcpu, vmx->rmode.irq.rip - 1); | |
872 | return; | |
873 | } | |
874 | ||
66fd3f7f GN |
875 | if (kvm_exception_is_soft(nr)) { |
876 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
877 | vmx->vcpu.arch.event_exit_inst_len); | |
8ab2d2e2 JK |
878 | intr_info |= INTR_TYPE_SOFT_EXCEPTION; |
879 | } else | |
880 | intr_info |= INTR_TYPE_HARD_EXCEPTION; | |
881 | ||
882 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info); | |
298101da AK |
883 | } |
884 | ||
a75beee6 ED |
885 | /* |
886 | * Swap MSR entry in host/guest MSR entry array. | |
887 | */ | |
8b9cf98c | 888 | static void move_msr_up(struct vcpu_vmx *vmx, int from, int to) |
a75beee6 | 889 | { |
26bb0981 | 890 | struct shared_msr_entry tmp; |
a2fa3e9f GH |
891 | |
892 | tmp = vmx->guest_msrs[to]; | |
893 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; | |
894 | vmx->guest_msrs[from] = tmp; | |
a75beee6 ED |
895 | } |
896 | ||
e38aea3e AK |
897 | /* |
898 | * Set up the vmcs to automatically save and restore system | |
899 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy | |
900 | * mode, as fiddling with msrs is very expensive. | |
901 | */ | |
8b9cf98c | 902 | static void setup_msrs(struct vcpu_vmx *vmx) |
e38aea3e | 903 | { |
26bb0981 | 904 | int save_nmsrs, index; |
5897297b | 905 | unsigned long *msr_bitmap; |
e38aea3e | 906 | |
33f9c505 | 907 | vmx_load_host_state(vmx); |
a75beee6 ED |
908 | save_nmsrs = 0; |
909 | #ifdef CONFIG_X86_64 | |
8b9cf98c | 910 | if (is_long_mode(&vmx->vcpu)) { |
8b9cf98c | 911 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
a75beee6 | 912 | if (index >= 0) |
8b9cf98c RR |
913 | move_msr_up(vmx, index, save_nmsrs++); |
914 | index = __find_msr_index(vmx, MSR_LSTAR); | |
a75beee6 | 915 | if (index >= 0) |
8b9cf98c RR |
916 | move_msr_up(vmx, index, save_nmsrs++); |
917 | index = __find_msr_index(vmx, MSR_CSTAR); | |
a75beee6 | 918 | if (index >= 0) |
8b9cf98c | 919 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
920 | /* |
921 | * MSR_K6_STAR is only needed on long mode guests, and only | |
922 | * if efer.sce is enabled. | |
923 | */ | |
8b9cf98c | 924 | index = __find_msr_index(vmx, MSR_K6_STAR); |
ad312c7c | 925 | if ((index >= 0) && (vmx->vcpu.arch.shadow_efer & EFER_SCE)) |
8b9cf98c | 926 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
927 | } |
928 | #endif | |
26bb0981 AK |
929 | vmx->msr_offset_efer = index = __find_msr_index(vmx, MSR_EFER); |
930 | if (index >= 0 && update_transition_efer(vmx)) | |
931 | move_msr_up(vmx, index, save_nmsrs++); | |
e38aea3e | 932 | |
26bb0981 | 933 | vmx->save_nmsrs = save_nmsrs; |
5897297b AK |
934 | |
935 | if (cpu_has_vmx_msr_bitmap()) { | |
936 | if (is_long_mode(&vmx->vcpu)) | |
937 | msr_bitmap = vmx_msr_bitmap_longmode; | |
938 | else | |
939 | msr_bitmap = vmx_msr_bitmap_legacy; | |
940 | ||
941 | vmcs_write64(MSR_BITMAP, __pa(msr_bitmap)); | |
942 | } | |
e38aea3e AK |
943 | } |
944 | ||
6aa8b732 AK |
945 | /* |
946 | * reads and returns guest's timestamp counter "register" | |
947 | * guest_tsc = host_tsc + tsc_offset -- 21.3 | |
948 | */ | |
949 | static u64 guest_read_tsc(void) | |
950 | { | |
951 | u64 host_tsc, tsc_offset; | |
952 | ||
953 | rdtscll(host_tsc); | |
954 | tsc_offset = vmcs_read64(TSC_OFFSET); | |
955 | return host_tsc + tsc_offset; | |
956 | } | |
957 | ||
958 | /* | |
959 | * writes 'guest_tsc' into guest's timestamp counter "register" | |
960 | * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc | |
961 | */ | |
53f658b3 | 962 | static void guest_write_tsc(u64 guest_tsc, u64 host_tsc) |
6aa8b732 | 963 | { |
6aa8b732 AK |
964 | vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc); |
965 | } | |
966 | ||
6aa8b732 AK |
967 | /* |
968 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
969 | * Returns 0 on success, non-0 otherwise. | |
970 | * Assumes vcpu_load() was already called. | |
971 | */ | |
972 | static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
973 | { | |
974 | u64 data; | |
26bb0981 | 975 | struct shared_msr_entry *msr; |
6aa8b732 AK |
976 | |
977 | if (!pdata) { | |
978 | printk(KERN_ERR "BUG: get_msr called with NULL pdata\n"); | |
979 | return -EINVAL; | |
980 | } | |
981 | ||
982 | switch (msr_index) { | |
05b3e0c2 | 983 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
984 | case MSR_FS_BASE: |
985 | data = vmcs_readl(GUEST_FS_BASE); | |
986 | break; | |
987 | case MSR_GS_BASE: | |
988 | data = vmcs_readl(GUEST_GS_BASE); | |
989 | break; | |
44ea2b17 AK |
990 | case MSR_KERNEL_GS_BASE: |
991 | vmx_load_host_state(to_vmx(vcpu)); | |
992 | data = to_vmx(vcpu)->msr_guest_kernel_gs_base; | |
993 | break; | |
26bb0981 | 994 | #endif |
6aa8b732 | 995 | case MSR_EFER: |
3bab1f5d | 996 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
af24a4e4 | 997 | case MSR_IA32_TSC: |
6aa8b732 AK |
998 | data = guest_read_tsc(); |
999 | break; | |
1000 | case MSR_IA32_SYSENTER_CS: | |
1001 | data = vmcs_read32(GUEST_SYSENTER_CS); | |
1002 | break; | |
1003 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 1004 | data = vmcs_readl(GUEST_SYSENTER_EIP); |
6aa8b732 AK |
1005 | break; |
1006 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 1007 | data = vmcs_readl(GUEST_SYSENTER_ESP); |
6aa8b732 | 1008 | break; |
6aa8b732 | 1009 | default: |
26bb0981 | 1010 | vmx_load_host_state(to_vmx(vcpu)); |
8b9cf98c | 1011 | msr = find_msr_entry(to_vmx(vcpu), msr_index); |
3bab1f5d | 1012 | if (msr) { |
542423b0 | 1013 | vmx_load_host_state(to_vmx(vcpu)); |
3bab1f5d AK |
1014 | data = msr->data; |
1015 | break; | |
6aa8b732 | 1016 | } |
3bab1f5d | 1017 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
6aa8b732 AK |
1018 | } |
1019 | ||
1020 | *pdata = data; | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | /* | |
1025 | * Writes msr value into into the appropriate "register". | |
1026 | * Returns 0 on success, non-0 otherwise. | |
1027 | * Assumes vcpu_load() was already called. | |
1028 | */ | |
1029 | static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
1030 | { | |
a2fa3e9f | 1031 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 1032 | struct shared_msr_entry *msr; |
53f658b3 | 1033 | u64 host_tsc; |
2cc51560 ED |
1034 | int ret = 0; |
1035 | ||
6aa8b732 | 1036 | switch (msr_index) { |
3bab1f5d | 1037 | case MSR_EFER: |
a9b21b62 | 1038 | vmx_load_host_state(vmx); |
2cc51560 | 1039 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
2cc51560 | 1040 | break; |
16175a79 | 1041 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1042 | case MSR_FS_BASE: |
1043 | vmcs_writel(GUEST_FS_BASE, data); | |
1044 | break; | |
1045 | case MSR_GS_BASE: | |
1046 | vmcs_writel(GUEST_GS_BASE, data); | |
1047 | break; | |
44ea2b17 AK |
1048 | case MSR_KERNEL_GS_BASE: |
1049 | vmx_load_host_state(vmx); | |
1050 | vmx->msr_guest_kernel_gs_base = data; | |
1051 | break; | |
6aa8b732 AK |
1052 | #endif |
1053 | case MSR_IA32_SYSENTER_CS: | |
1054 | vmcs_write32(GUEST_SYSENTER_CS, data); | |
1055 | break; | |
1056 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 1057 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
6aa8b732 AK |
1058 | break; |
1059 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 1060 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
6aa8b732 | 1061 | break; |
af24a4e4 | 1062 | case MSR_IA32_TSC: |
53f658b3 MT |
1063 | rdtscll(host_tsc); |
1064 | guest_write_tsc(data, host_tsc); | |
6aa8b732 | 1065 | break; |
468d472f SY |
1066 | case MSR_IA32_CR_PAT: |
1067 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { | |
1068 | vmcs_write64(GUEST_IA32_PAT, data); | |
1069 | vcpu->arch.pat = data; | |
1070 | break; | |
1071 | } | |
1072 | /* Otherwise falls through to kvm_set_msr_common */ | |
6aa8b732 | 1073 | default: |
8b9cf98c | 1074 | msr = find_msr_entry(vmx, msr_index); |
3bab1f5d | 1075 | if (msr) { |
542423b0 | 1076 | vmx_load_host_state(vmx); |
3bab1f5d AK |
1077 | msr->data = data; |
1078 | break; | |
6aa8b732 | 1079 | } |
2cc51560 | 1080 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
6aa8b732 AK |
1081 | } |
1082 | ||
2cc51560 | 1083 | return ret; |
6aa8b732 AK |
1084 | } |
1085 | ||
5fdbf976 | 1086 | static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) |
6aa8b732 | 1087 | { |
5fdbf976 MT |
1088 | __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); |
1089 | switch (reg) { | |
1090 | case VCPU_REGS_RSP: | |
1091 | vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); | |
1092 | break; | |
1093 | case VCPU_REGS_RIP: | |
1094 | vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP); | |
1095 | break; | |
6de4f3ad AK |
1096 | case VCPU_EXREG_PDPTR: |
1097 | if (enable_ept) | |
1098 | ept_save_pdptrs(vcpu); | |
1099 | break; | |
5fdbf976 MT |
1100 | default: |
1101 | break; | |
1102 | } | |
6aa8b732 AK |
1103 | } |
1104 | ||
355be0b9 | 1105 | static void set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) |
6aa8b732 | 1106 | { |
ae675ef0 JK |
1107 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
1108 | vmcs_writel(GUEST_DR7, dbg->arch.debugreg[7]); | |
1109 | else | |
1110 | vmcs_writel(GUEST_DR7, vcpu->arch.dr7); | |
1111 | ||
abd3f2d6 | 1112 | update_exception_bitmap(vcpu); |
6aa8b732 AK |
1113 | } |
1114 | ||
1115 | static __init int cpu_has_kvm_support(void) | |
1116 | { | |
6210e37b | 1117 | return cpu_has_vmx(); |
6aa8b732 AK |
1118 | } |
1119 | ||
1120 | static __init int vmx_disabled_by_bios(void) | |
1121 | { | |
1122 | u64 msr; | |
1123 | ||
1124 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); | |
9ea542fa SY |
1125 | return (msr & (FEATURE_CONTROL_LOCKED | |
1126 | FEATURE_CONTROL_VMXON_ENABLED)) | |
1127 | == FEATURE_CONTROL_LOCKED; | |
62b3ffb8 | 1128 | /* locked but not enabled */ |
6aa8b732 AK |
1129 | } |
1130 | ||
10474ae8 | 1131 | static int hardware_enable(void *garbage) |
6aa8b732 AK |
1132 | { |
1133 | int cpu = raw_smp_processor_id(); | |
1134 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); | |
1135 | u64 old; | |
1136 | ||
10474ae8 AG |
1137 | if (read_cr4() & X86_CR4_VMXE) |
1138 | return -EBUSY; | |
1139 | ||
543e4243 | 1140 | INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu)); |
6aa8b732 | 1141 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); |
9ea542fa SY |
1142 | if ((old & (FEATURE_CONTROL_LOCKED | |
1143 | FEATURE_CONTROL_VMXON_ENABLED)) | |
1144 | != (FEATURE_CONTROL_LOCKED | | |
1145 | FEATURE_CONTROL_VMXON_ENABLED)) | |
6aa8b732 | 1146 | /* enable and lock */ |
62b3ffb8 | 1147 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | |
9ea542fa SY |
1148 | FEATURE_CONTROL_LOCKED | |
1149 | FEATURE_CONTROL_VMXON_ENABLED); | |
66aee91a | 1150 | write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ |
4ecac3fd AK |
1151 | asm volatile (ASM_VMX_VMXON_RAX |
1152 | : : "a"(&phys_addr), "m"(phys_addr) | |
6aa8b732 | 1153 | : "memory", "cc"); |
10474ae8 AG |
1154 | |
1155 | ept_sync_global(); | |
1156 | ||
1157 | return 0; | |
6aa8b732 AK |
1158 | } |
1159 | ||
543e4243 AK |
1160 | static void vmclear_local_vcpus(void) |
1161 | { | |
1162 | int cpu = raw_smp_processor_id(); | |
1163 | struct vcpu_vmx *vmx, *n; | |
1164 | ||
1165 | list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu), | |
1166 | local_vcpus_link) | |
1167 | __vcpu_clear(vmx); | |
1168 | } | |
1169 | ||
710ff4a8 EH |
1170 | |
1171 | /* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot() | |
1172 | * tricks. | |
1173 | */ | |
1174 | static void kvm_cpu_vmxoff(void) | |
6aa8b732 | 1175 | { |
4ecac3fd | 1176 | asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc"); |
e693d71b | 1177 | write_cr4(read_cr4() & ~X86_CR4_VMXE); |
6aa8b732 AK |
1178 | } |
1179 | ||
710ff4a8 EH |
1180 | static void hardware_disable(void *garbage) |
1181 | { | |
1182 | vmclear_local_vcpus(); | |
1183 | kvm_cpu_vmxoff(); | |
1184 | } | |
1185 | ||
1c3d14fe | 1186 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
d77c26fc | 1187 | u32 msr, u32 *result) |
1c3d14fe YS |
1188 | { |
1189 | u32 vmx_msr_low, vmx_msr_high; | |
1190 | u32 ctl = ctl_min | ctl_opt; | |
1191 | ||
1192 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
1193 | ||
1194 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ | |
1195 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ | |
1196 | ||
1197 | /* Ensure minimum (required) set of control bits are supported. */ | |
1198 | if (ctl_min & ~ctl) | |
002c7f7c | 1199 | return -EIO; |
1c3d14fe YS |
1200 | |
1201 | *result = ctl; | |
1202 | return 0; | |
1203 | } | |
1204 | ||
002c7f7c | 1205 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
6aa8b732 AK |
1206 | { |
1207 | u32 vmx_msr_low, vmx_msr_high; | |
d56f546d | 1208 | u32 min, opt, min2, opt2; |
1c3d14fe YS |
1209 | u32 _pin_based_exec_control = 0; |
1210 | u32 _cpu_based_exec_control = 0; | |
f78e0e2e | 1211 | u32 _cpu_based_2nd_exec_control = 0; |
1c3d14fe YS |
1212 | u32 _vmexit_control = 0; |
1213 | u32 _vmentry_control = 0; | |
1214 | ||
1215 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; | |
f08864b4 | 1216 | opt = PIN_BASED_VIRTUAL_NMIS; |
1c3d14fe YS |
1217 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, |
1218 | &_pin_based_exec_control) < 0) | |
002c7f7c | 1219 | return -EIO; |
1c3d14fe YS |
1220 | |
1221 | min = CPU_BASED_HLT_EXITING | | |
1222 | #ifdef CONFIG_X86_64 | |
1223 | CPU_BASED_CR8_LOAD_EXITING | | |
1224 | CPU_BASED_CR8_STORE_EXITING | | |
1225 | #endif | |
d56f546d SY |
1226 | CPU_BASED_CR3_LOAD_EXITING | |
1227 | CPU_BASED_CR3_STORE_EXITING | | |
1c3d14fe YS |
1228 | CPU_BASED_USE_IO_BITMAPS | |
1229 | CPU_BASED_MOV_DR_EXITING | | |
a7052897 MT |
1230 | CPU_BASED_USE_TSC_OFFSETING | |
1231 | CPU_BASED_INVLPG_EXITING; | |
f78e0e2e | 1232 | opt = CPU_BASED_TPR_SHADOW | |
25c5f225 | 1233 | CPU_BASED_USE_MSR_BITMAPS | |
f78e0e2e | 1234 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
1c3d14fe YS |
1235 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
1236 | &_cpu_based_exec_control) < 0) | |
002c7f7c | 1237 | return -EIO; |
6e5d865c YS |
1238 | #ifdef CONFIG_X86_64 |
1239 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
1240 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & | |
1241 | ~CPU_BASED_CR8_STORE_EXITING; | |
1242 | #endif | |
f78e0e2e | 1243 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
d56f546d SY |
1244 | min2 = 0; |
1245 | opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | | |
2384d2b3 | 1246 | SECONDARY_EXEC_WBINVD_EXITING | |
d56f546d | 1247 | SECONDARY_EXEC_ENABLE_VPID | |
3a624e29 | 1248 | SECONDARY_EXEC_ENABLE_EPT | |
4b8d54f9 ZE |
1249 | SECONDARY_EXEC_UNRESTRICTED_GUEST | |
1250 | SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
d56f546d SY |
1251 | if (adjust_vmx_controls(min2, opt2, |
1252 | MSR_IA32_VMX_PROCBASED_CTLS2, | |
f78e0e2e SY |
1253 | &_cpu_based_2nd_exec_control) < 0) |
1254 | return -EIO; | |
1255 | } | |
1256 | #ifndef CONFIG_X86_64 | |
1257 | if (!(_cpu_based_2nd_exec_control & | |
1258 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
1259 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; | |
1260 | #endif | |
d56f546d | 1261 | if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) { |
a7052897 MT |
1262 | /* CR3 accesses and invlpg don't need to cause VM Exits when EPT |
1263 | enabled */ | |
5fff7d27 GN |
1264 | _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING | |
1265 | CPU_BASED_CR3_STORE_EXITING | | |
1266 | CPU_BASED_INVLPG_EXITING); | |
d56f546d SY |
1267 | rdmsr(MSR_IA32_VMX_EPT_VPID_CAP, |
1268 | vmx_capability.ept, vmx_capability.vpid); | |
1269 | } | |
1c3d14fe YS |
1270 | |
1271 | min = 0; | |
1272 | #ifdef CONFIG_X86_64 | |
1273 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; | |
1274 | #endif | |
468d472f | 1275 | opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT; |
1c3d14fe YS |
1276 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, |
1277 | &_vmexit_control) < 0) | |
002c7f7c | 1278 | return -EIO; |
1c3d14fe | 1279 | |
468d472f SY |
1280 | min = 0; |
1281 | opt = VM_ENTRY_LOAD_IA32_PAT; | |
1c3d14fe YS |
1282 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, |
1283 | &_vmentry_control) < 0) | |
002c7f7c | 1284 | return -EIO; |
6aa8b732 | 1285 | |
c68876fd | 1286 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
1c3d14fe YS |
1287 | |
1288 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ | |
1289 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) | |
002c7f7c | 1290 | return -EIO; |
1c3d14fe YS |
1291 | |
1292 | #ifdef CONFIG_X86_64 | |
1293 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ | |
1294 | if (vmx_msr_high & (1u<<16)) | |
002c7f7c | 1295 | return -EIO; |
1c3d14fe YS |
1296 | #endif |
1297 | ||
1298 | /* Require Write-Back (WB) memory type for VMCS accesses. */ | |
1299 | if (((vmx_msr_high >> 18) & 15) != 6) | |
002c7f7c | 1300 | return -EIO; |
1c3d14fe | 1301 | |
002c7f7c YS |
1302 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
1303 | vmcs_conf->order = get_order(vmcs_config.size); | |
1304 | vmcs_conf->revision_id = vmx_msr_low; | |
1c3d14fe | 1305 | |
002c7f7c YS |
1306 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
1307 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; | |
f78e0e2e | 1308 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
002c7f7c YS |
1309 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
1310 | vmcs_conf->vmentry_ctrl = _vmentry_control; | |
1c3d14fe YS |
1311 | |
1312 | return 0; | |
c68876fd | 1313 | } |
6aa8b732 AK |
1314 | |
1315 | static struct vmcs *alloc_vmcs_cpu(int cpu) | |
1316 | { | |
1317 | int node = cpu_to_node(cpu); | |
1318 | struct page *pages; | |
1319 | struct vmcs *vmcs; | |
1320 | ||
6484eb3e | 1321 | pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order); |
6aa8b732 AK |
1322 | if (!pages) |
1323 | return NULL; | |
1324 | vmcs = page_address(pages); | |
1c3d14fe YS |
1325 | memset(vmcs, 0, vmcs_config.size); |
1326 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ | |
6aa8b732 AK |
1327 | return vmcs; |
1328 | } | |
1329 | ||
1330 | static struct vmcs *alloc_vmcs(void) | |
1331 | { | |
d3b2c338 | 1332 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
6aa8b732 AK |
1333 | } |
1334 | ||
1335 | static void free_vmcs(struct vmcs *vmcs) | |
1336 | { | |
1c3d14fe | 1337 | free_pages((unsigned long)vmcs, vmcs_config.order); |
6aa8b732 AK |
1338 | } |
1339 | ||
39959588 | 1340 | static void free_kvm_area(void) |
6aa8b732 AK |
1341 | { |
1342 | int cpu; | |
1343 | ||
3230bb47 | 1344 | for_each_possible_cpu(cpu) { |
6aa8b732 | 1345 | free_vmcs(per_cpu(vmxarea, cpu)); |
3230bb47 ZA |
1346 | per_cpu(vmxarea, cpu) = NULL; |
1347 | } | |
6aa8b732 AK |
1348 | } |
1349 | ||
6aa8b732 AK |
1350 | static __init int alloc_kvm_area(void) |
1351 | { | |
1352 | int cpu; | |
1353 | ||
3230bb47 | 1354 | for_each_possible_cpu(cpu) { |
6aa8b732 AK |
1355 | struct vmcs *vmcs; |
1356 | ||
1357 | vmcs = alloc_vmcs_cpu(cpu); | |
1358 | if (!vmcs) { | |
1359 | free_kvm_area(); | |
1360 | return -ENOMEM; | |
1361 | } | |
1362 | ||
1363 | per_cpu(vmxarea, cpu) = vmcs; | |
1364 | } | |
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | static __init int hardware_setup(void) | |
1369 | { | |
002c7f7c YS |
1370 | if (setup_vmcs_config(&vmcs_config) < 0) |
1371 | return -EIO; | |
50a37eb4 JR |
1372 | |
1373 | if (boot_cpu_has(X86_FEATURE_NX)) | |
1374 | kvm_enable_efer_bits(EFER_NX); | |
1375 | ||
93ba03c2 SY |
1376 | if (!cpu_has_vmx_vpid()) |
1377 | enable_vpid = 0; | |
1378 | ||
3a624e29 | 1379 | if (!cpu_has_vmx_ept()) { |
93ba03c2 | 1380 | enable_ept = 0; |
3a624e29 NK |
1381 | enable_unrestricted_guest = 0; |
1382 | } | |
1383 | ||
1384 | if (!cpu_has_vmx_unrestricted_guest()) | |
1385 | enable_unrestricted_guest = 0; | |
93ba03c2 SY |
1386 | |
1387 | if (!cpu_has_vmx_flexpriority()) | |
1388 | flexpriority_enabled = 0; | |
1389 | ||
95ba8273 GN |
1390 | if (!cpu_has_vmx_tpr_shadow()) |
1391 | kvm_x86_ops->update_cr8_intercept = NULL; | |
1392 | ||
54dee993 MT |
1393 | if (enable_ept && !cpu_has_vmx_ept_2m_page()) |
1394 | kvm_disable_largepages(); | |
1395 | ||
4b8d54f9 ZE |
1396 | if (!cpu_has_vmx_ple()) |
1397 | ple_gap = 0; | |
1398 | ||
6aa8b732 AK |
1399 | return alloc_kvm_area(); |
1400 | } | |
1401 | ||
1402 | static __exit void hardware_unsetup(void) | |
1403 | { | |
1404 | free_kvm_area(); | |
1405 | } | |
1406 | ||
6aa8b732 AK |
1407 | static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save) |
1408 | { | |
1409 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1410 | ||
6af11b9e | 1411 | if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) { |
6aa8b732 AK |
1412 | vmcs_write16(sf->selector, save->selector); |
1413 | vmcs_writel(sf->base, save->base); | |
1414 | vmcs_write32(sf->limit, save->limit); | |
1415 | vmcs_write32(sf->ar_bytes, save->ar); | |
1416 | } else { | |
1417 | u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK) | |
1418 | << AR_DPL_SHIFT; | |
1419 | vmcs_write32(sf->ar_bytes, 0x93 | dpl); | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | static void enter_pmode(struct kvm_vcpu *vcpu) | |
1424 | { | |
1425 | unsigned long flags; | |
a89a8fb9 | 1426 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 1427 | |
a89a8fb9 | 1428 | vmx->emulation_required = 1; |
7ffd92c5 | 1429 | vmx->rmode.vm86_active = 0; |
6aa8b732 | 1430 | |
7ffd92c5 AK |
1431 | vmcs_writel(GUEST_TR_BASE, vmx->rmode.tr.base); |
1432 | vmcs_write32(GUEST_TR_LIMIT, vmx->rmode.tr.limit); | |
1433 | vmcs_write32(GUEST_TR_AR_BYTES, vmx->rmode.tr.ar); | |
6aa8b732 AK |
1434 | |
1435 | flags = vmcs_readl(GUEST_RFLAGS); | |
053de044 | 1436 | flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM); |
7ffd92c5 | 1437 | flags |= (vmx->rmode.save_iopl << IOPL_SHIFT); |
6aa8b732 AK |
1438 | vmcs_writel(GUEST_RFLAGS, flags); |
1439 | ||
66aee91a RR |
1440 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
1441 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); | |
6aa8b732 AK |
1442 | |
1443 | update_exception_bitmap(vcpu); | |
1444 | ||
a89a8fb9 MG |
1445 | if (emulate_invalid_guest_state) |
1446 | return; | |
1447 | ||
7ffd92c5 AK |
1448 | fix_pmode_dataseg(VCPU_SREG_ES, &vmx->rmode.es); |
1449 | fix_pmode_dataseg(VCPU_SREG_DS, &vmx->rmode.ds); | |
1450 | fix_pmode_dataseg(VCPU_SREG_GS, &vmx->rmode.gs); | |
1451 | fix_pmode_dataseg(VCPU_SREG_FS, &vmx->rmode.fs); | |
6aa8b732 AK |
1452 | |
1453 | vmcs_write16(GUEST_SS_SELECTOR, 0); | |
1454 | vmcs_write32(GUEST_SS_AR_BYTES, 0x93); | |
1455 | ||
1456 | vmcs_write16(GUEST_CS_SELECTOR, | |
1457 | vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK); | |
1458 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); | |
1459 | } | |
1460 | ||
d77c26fc | 1461 | static gva_t rmode_tss_base(struct kvm *kvm) |
6aa8b732 | 1462 | { |
bfc6d222 | 1463 | if (!kvm->arch.tss_addr) { |
cbc94022 IE |
1464 | gfn_t base_gfn = kvm->memslots[0].base_gfn + |
1465 | kvm->memslots[0].npages - 3; | |
1466 | return base_gfn << PAGE_SHIFT; | |
1467 | } | |
bfc6d222 | 1468 | return kvm->arch.tss_addr; |
6aa8b732 AK |
1469 | } |
1470 | ||
1471 | static void fix_rmode_seg(int seg, struct kvm_save_segment *save) | |
1472 | { | |
1473 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1474 | ||
1475 | save->selector = vmcs_read16(sf->selector); | |
1476 | save->base = vmcs_readl(sf->base); | |
1477 | save->limit = vmcs_read32(sf->limit); | |
1478 | save->ar = vmcs_read32(sf->ar_bytes); | |
15b00f32 JK |
1479 | vmcs_write16(sf->selector, save->base >> 4); |
1480 | vmcs_write32(sf->base, save->base & 0xfffff); | |
6aa8b732 AK |
1481 | vmcs_write32(sf->limit, 0xffff); |
1482 | vmcs_write32(sf->ar_bytes, 0xf3); | |
1483 | } | |
1484 | ||
1485 | static void enter_rmode(struct kvm_vcpu *vcpu) | |
1486 | { | |
1487 | unsigned long flags; | |
a89a8fb9 | 1488 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 1489 | |
3a624e29 NK |
1490 | if (enable_unrestricted_guest) |
1491 | return; | |
1492 | ||
a89a8fb9 | 1493 | vmx->emulation_required = 1; |
7ffd92c5 | 1494 | vmx->rmode.vm86_active = 1; |
6aa8b732 | 1495 | |
7ffd92c5 | 1496 | vmx->rmode.tr.base = vmcs_readl(GUEST_TR_BASE); |
6aa8b732 AK |
1497 | vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); |
1498 | ||
7ffd92c5 | 1499 | vmx->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT); |
6aa8b732 AK |
1500 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
1501 | ||
7ffd92c5 | 1502 | vmx->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES); |
6aa8b732 AK |
1503 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
1504 | ||
1505 | flags = vmcs_readl(GUEST_RFLAGS); | |
7ffd92c5 | 1506 | vmx->rmode.save_iopl |
ad312c7c | 1507 | = (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT; |
6aa8b732 | 1508 | |
053de044 | 1509 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
1510 | |
1511 | vmcs_writel(GUEST_RFLAGS, flags); | |
66aee91a | 1512 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
6aa8b732 AK |
1513 | update_exception_bitmap(vcpu); |
1514 | ||
a89a8fb9 MG |
1515 | if (emulate_invalid_guest_state) |
1516 | goto continue_rmode; | |
1517 | ||
6aa8b732 AK |
1518 | vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4); |
1519 | vmcs_write32(GUEST_SS_LIMIT, 0xffff); | |
1520 | vmcs_write32(GUEST_SS_AR_BYTES, 0xf3); | |
1521 | ||
1522 | vmcs_write32(GUEST_CS_AR_BYTES, 0xf3); | |
abacf8df | 1523 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
8cb5b033 AK |
1524 | if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000) |
1525 | vmcs_writel(GUEST_CS_BASE, 0xf0000); | |
6aa8b732 AK |
1526 | vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4); |
1527 | ||
7ffd92c5 AK |
1528 | fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.es); |
1529 | fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.ds); | |
1530 | fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.gs); | |
1531 | fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.fs); | |
75880a01 | 1532 | |
a89a8fb9 | 1533 | continue_rmode: |
8668a3c4 | 1534 | kvm_mmu_reset_context(vcpu); |
b7ebfb05 | 1535 | init_rmode(vcpu->kvm); |
6aa8b732 AK |
1536 | } |
1537 | ||
401d10de AS |
1538 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
1539 | { | |
1540 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
26bb0981 AK |
1541 | struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); |
1542 | ||
1543 | if (!msr) | |
1544 | return; | |
401d10de | 1545 | |
44ea2b17 AK |
1546 | /* |
1547 | * Force kernel_gs_base reloading before EFER changes, as control | |
1548 | * of this msr depends on is_long_mode(). | |
1549 | */ | |
1550 | vmx_load_host_state(to_vmx(vcpu)); | |
401d10de AS |
1551 | vcpu->arch.shadow_efer = efer; |
1552 | if (!msr) | |
1553 | return; | |
1554 | if (efer & EFER_LMA) { | |
1555 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1556 | vmcs_read32(VM_ENTRY_CONTROLS) | | |
1557 | VM_ENTRY_IA32E_MODE); | |
1558 | msr->data = efer; | |
1559 | } else { | |
1560 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1561 | vmcs_read32(VM_ENTRY_CONTROLS) & | |
1562 | ~VM_ENTRY_IA32E_MODE); | |
1563 | ||
1564 | msr->data = efer & ~EFER_LME; | |
1565 | } | |
1566 | setup_msrs(vmx); | |
1567 | } | |
1568 | ||
05b3e0c2 | 1569 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1570 | |
1571 | static void enter_lmode(struct kvm_vcpu *vcpu) | |
1572 | { | |
1573 | u32 guest_tr_ar; | |
1574 | ||
1575 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); | |
1576 | if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) { | |
1577 | printk(KERN_DEBUG "%s: tss fixup for long mode. \n", | |
b8688d51 | 1578 | __func__); |
6aa8b732 AK |
1579 | vmcs_write32(GUEST_TR_AR_BYTES, |
1580 | (guest_tr_ar & ~AR_TYPE_MASK) | |
1581 | | AR_TYPE_BUSY_64_TSS); | |
1582 | } | |
ad312c7c | 1583 | vcpu->arch.shadow_efer |= EFER_LMA; |
401d10de | 1584 | vmx_set_efer(vcpu, vcpu->arch.shadow_efer); |
6aa8b732 AK |
1585 | } |
1586 | ||
1587 | static void exit_lmode(struct kvm_vcpu *vcpu) | |
1588 | { | |
ad312c7c | 1589 | vcpu->arch.shadow_efer &= ~EFER_LMA; |
6aa8b732 AK |
1590 | |
1591 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1592 | vmcs_read32(VM_ENTRY_CONTROLS) | |
1e4e6e00 | 1593 | & ~VM_ENTRY_IA32E_MODE); |
6aa8b732 AK |
1594 | } |
1595 | ||
1596 | #endif | |
1597 | ||
2384d2b3 SY |
1598 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
1599 | { | |
1600 | vpid_sync_vcpu_all(to_vmx(vcpu)); | |
089d034e | 1601 | if (enable_ept) |
4e1096d2 | 1602 | ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa)); |
2384d2b3 SY |
1603 | } |
1604 | ||
25c4c276 | 1605 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 | 1606 | { |
ad312c7c ZX |
1607 | vcpu->arch.cr4 &= KVM_GUEST_CR4_MASK; |
1608 | vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK; | |
399badf3 AK |
1609 | } |
1610 | ||
1439442c SY |
1611 | static void ept_load_pdptrs(struct kvm_vcpu *vcpu) |
1612 | { | |
6de4f3ad AK |
1613 | if (!test_bit(VCPU_EXREG_PDPTR, |
1614 | (unsigned long *)&vcpu->arch.regs_dirty)) | |
1615 | return; | |
1616 | ||
1439442c | 1617 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { |
1439442c SY |
1618 | vmcs_write64(GUEST_PDPTR0, vcpu->arch.pdptrs[0]); |
1619 | vmcs_write64(GUEST_PDPTR1, vcpu->arch.pdptrs[1]); | |
1620 | vmcs_write64(GUEST_PDPTR2, vcpu->arch.pdptrs[2]); | |
1621 | vmcs_write64(GUEST_PDPTR3, vcpu->arch.pdptrs[3]); | |
1622 | } | |
1623 | } | |
1624 | ||
8f5d549f AK |
1625 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu) |
1626 | { | |
1627 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { | |
1628 | vcpu->arch.pdptrs[0] = vmcs_read64(GUEST_PDPTR0); | |
1629 | vcpu->arch.pdptrs[1] = vmcs_read64(GUEST_PDPTR1); | |
1630 | vcpu->arch.pdptrs[2] = vmcs_read64(GUEST_PDPTR2); | |
1631 | vcpu->arch.pdptrs[3] = vmcs_read64(GUEST_PDPTR3); | |
1632 | } | |
6de4f3ad AK |
1633 | |
1634 | __set_bit(VCPU_EXREG_PDPTR, | |
1635 | (unsigned long *)&vcpu->arch.regs_avail); | |
1636 | __set_bit(VCPU_EXREG_PDPTR, | |
1637 | (unsigned long *)&vcpu->arch.regs_dirty); | |
8f5d549f AK |
1638 | } |
1639 | ||
1439442c SY |
1640 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); |
1641 | ||
1642 | static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, | |
1643 | unsigned long cr0, | |
1644 | struct kvm_vcpu *vcpu) | |
1645 | { | |
1646 | if (!(cr0 & X86_CR0_PG)) { | |
1647 | /* From paging/starting to nonpaging */ | |
1648 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 1649 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) | |
1439442c SY |
1650 | (CPU_BASED_CR3_LOAD_EXITING | |
1651 | CPU_BASED_CR3_STORE_EXITING)); | |
1652 | vcpu->arch.cr0 = cr0; | |
1653 | vmx_set_cr4(vcpu, vcpu->arch.cr4); | |
1439442c SY |
1654 | } else if (!is_paging(vcpu)) { |
1655 | /* From nonpaging to paging */ | |
1656 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 1657 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) & |
1439442c SY |
1658 | ~(CPU_BASED_CR3_LOAD_EXITING | |
1659 | CPU_BASED_CR3_STORE_EXITING)); | |
1660 | vcpu->arch.cr0 = cr0; | |
1661 | vmx_set_cr4(vcpu, vcpu->arch.cr4); | |
1439442c | 1662 | } |
95eb84a7 SY |
1663 | |
1664 | if (!(cr0 & X86_CR0_WP)) | |
1665 | *hw_cr0 &= ~X86_CR0_WP; | |
1439442c SY |
1666 | } |
1667 | ||
1668 | static void ept_update_paging_mode_cr4(unsigned long *hw_cr4, | |
1669 | struct kvm_vcpu *vcpu) | |
1670 | { | |
1671 | if (!is_paging(vcpu)) { | |
1672 | *hw_cr4 &= ~X86_CR4_PAE; | |
1673 | *hw_cr4 |= X86_CR4_PSE; | |
1674 | } else if (!(vcpu->arch.cr4 & X86_CR4_PAE)) | |
1675 | *hw_cr4 &= ~X86_CR4_PAE; | |
1676 | } | |
1677 | ||
6aa8b732 AK |
1678 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
1679 | { | |
7ffd92c5 | 1680 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3a624e29 NK |
1681 | unsigned long hw_cr0; |
1682 | ||
1683 | if (enable_unrestricted_guest) | |
1684 | hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST) | |
1685 | | KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST; | |
1686 | else | |
1687 | hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON; | |
1439442c | 1688 | |
5fd86fcf AK |
1689 | vmx_fpu_deactivate(vcpu); |
1690 | ||
7ffd92c5 | 1691 | if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE)) |
6aa8b732 AK |
1692 | enter_pmode(vcpu); |
1693 | ||
7ffd92c5 | 1694 | if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE)) |
6aa8b732 AK |
1695 | enter_rmode(vcpu); |
1696 | ||
05b3e0c2 | 1697 | #ifdef CONFIG_X86_64 |
ad312c7c | 1698 | if (vcpu->arch.shadow_efer & EFER_LME) { |
707d92fa | 1699 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
6aa8b732 | 1700 | enter_lmode(vcpu); |
707d92fa | 1701 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
6aa8b732 AK |
1702 | exit_lmode(vcpu); |
1703 | } | |
1704 | #endif | |
1705 | ||
089d034e | 1706 | if (enable_ept) |
1439442c SY |
1707 | ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu); |
1708 | ||
6aa8b732 | 1709 | vmcs_writel(CR0_READ_SHADOW, cr0); |
1439442c | 1710 | vmcs_writel(GUEST_CR0, hw_cr0); |
ad312c7c | 1711 | vcpu->arch.cr0 = cr0; |
5fd86fcf | 1712 | |
707d92fa | 1713 | if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE)) |
5fd86fcf | 1714 | vmx_fpu_activate(vcpu); |
6aa8b732 AK |
1715 | } |
1716 | ||
1439442c SY |
1717 | static u64 construct_eptp(unsigned long root_hpa) |
1718 | { | |
1719 | u64 eptp; | |
1720 | ||
1721 | /* TODO write the value reading from MSR */ | |
1722 | eptp = VMX_EPT_DEFAULT_MT | | |
1723 | VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT; | |
1724 | eptp |= (root_hpa & PAGE_MASK); | |
1725 | ||
1726 | return eptp; | |
1727 | } | |
1728 | ||
6aa8b732 AK |
1729 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
1730 | { | |
1439442c SY |
1731 | unsigned long guest_cr3; |
1732 | u64 eptp; | |
1733 | ||
1734 | guest_cr3 = cr3; | |
089d034e | 1735 | if (enable_ept) { |
1439442c SY |
1736 | eptp = construct_eptp(cr3); |
1737 | vmcs_write64(EPT_POINTER, eptp); | |
1439442c | 1738 | guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 : |
b927a3ce | 1739 | vcpu->kvm->arch.ept_identity_map_addr; |
7c93be44 | 1740 | ept_load_pdptrs(vcpu); |
1439442c SY |
1741 | } |
1742 | ||
2384d2b3 | 1743 | vmx_flush_tlb(vcpu); |
1439442c | 1744 | vmcs_writel(GUEST_CR3, guest_cr3); |
ad312c7c | 1745 | if (vcpu->arch.cr0 & X86_CR0_PE) |
5fd86fcf | 1746 | vmx_fpu_deactivate(vcpu); |
6aa8b732 AK |
1747 | } |
1748 | ||
1749 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
1750 | { | |
7ffd92c5 | 1751 | unsigned long hw_cr4 = cr4 | (to_vmx(vcpu)->rmode.vm86_active ? |
1439442c SY |
1752 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON); |
1753 | ||
ad312c7c | 1754 | vcpu->arch.cr4 = cr4; |
089d034e | 1755 | if (enable_ept) |
1439442c SY |
1756 | ept_update_paging_mode_cr4(&hw_cr4, vcpu); |
1757 | ||
1758 | vmcs_writel(CR4_READ_SHADOW, cr4); | |
1759 | vmcs_writel(GUEST_CR4, hw_cr4); | |
6aa8b732 AK |
1760 | } |
1761 | ||
6aa8b732 AK |
1762 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
1763 | { | |
1764 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1765 | ||
1766 | return vmcs_readl(sf->base); | |
1767 | } | |
1768 | ||
1769 | static void vmx_get_segment(struct kvm_vcpu *vcpu, | |
1770 | struct kvm_segment *var, int seg) | |
1771 | { | |
1772 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1773 | u32 ar; | |
1774 | ||
1775 | var->base = vmcs_readl(sf->base); | |
1776 | var->limit = vmcs_read32(sf->limit); | |
1777 | var->selector = vmcs_read16(sf->selector); | |
1778 | ar = vmcs_read32(sf->ar_bytes); | |
9fd4a3b7 | 1779 | if ((ar & AR_UNUSABLE_MASK) && !emulate_invalid_guest_state) |
6aa8b732 AK |
1780 | ar = 0; |
1781 | var->type = ar & 15; | |
1782 | var->s = (ar >> 4) & 1; | |
1783 | var->dpl = (ar >> 5) & 3; | |
1784 | var->present = (ar >> 7) & 1; | |
1785 | var->avl = (ar >> 12) & 1; | |
1786 | var->l = (ar >> 13) & 1; | |
1787 | var->db = (ar >> 14) & 1; | |
1788 | var->g = (ar >> 15) & 1; | |
1789 | var->unusable = (ar >> 16) & 1; | |
1790 | } | |
1791 | ||
2e4d2653 IE |
1792 | static int vmx_get_cpl(struct kvm_vcpu *vcpu) |
1793 | { | |
2e4d2653 IE |
1794 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) /* if real mode */ |
1795 | return 0; | |
1796 | ||
1797 | if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */ | |
1798 | return 3; | |
1799 | ||
eab4b8aa | 1800 | return vmcs_read16(GUEST_CS_SELECTOR) & 3; |
2e4d2653 IE |
1801 | } |
1802 | ||
653e3108 | 1803 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
6aa8b732 | 1804 | { |
6aa8b732 AK |
1805 | u32 ar; |
1806 | ||
653e3108 | 1807 | if (var->unusable) |
6aa8b732 AK |
1808 | ar = 1 << 16; |
1809 | else { | |
1810 | ar = var->type & 15; | |
1811 | ar |= (var->s & 1) << 4; | |
1812 | ar |= (var->dpl & 3) << 5; | |
1813 | ar |= (var->present & 1) << 7; | |
1814 | ar |= (var->avl & 1) << 12; | |
1815 | ar |= (var->l & 1) << 13; | |
1816 | ar |= (var->db & 1) << 14; | |
1817 | ar |= (var->g & 1) << 15; | |
1818 | } | |
f7fbf1fd UL |
1819 | if (ar == 0) /* a 0 value means unusable */ |
1820 | ar = AR_UNUSABLE_MASK; | |
653e3108 AK |
1821 | |
1822 | return ar; | |
1823 | } | |
1824 | ||
1825 | static void vmx_set_segment(struct kvm_vcpu *vcpu, | |
1826 | struct kvm_segment *var, int seg) | |
1827 | { | |
7ffd92c5 | 1828 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
653e3108 AK |
1829 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
1830 | u32 ar; | |
1831 | ||
7ffd92c5 AK |
1832 | if (vmx->rmode.vm86_active && seg == VCPU_SREG_TR) { |
1833 | vmx->rmode.tr.selector = var->selector; | |
1834 | vmx->rmode.tr.base = var->base; | |
1835 | vmx->rmode.tr.limit = var->limit; | |
1836 | vmx->rmode.tr.ar = vmx_segment_access_rights(var); | |
653e3108 AK |
1837 | return; |
1838 | } | |
1839 | vmcs_writel(sf->base, var->base); | |
1840 | vmcs_write32(sf->limit, var->limit); | |
1841 | vmcs_write16(sf->selector, var->selector); | |
7ffd92c5 | 1842 | if (vmx->rmode.vm86_active && var->s) { |
653e3108 AK |
1843 | /* |
1844 | * Hack real-mode segments into vm86 compatibility. | |
1845 | */ | |
1846 | if (var->base == 0xffff0000 && var->selector == 0xf000) | |
1847 | vmcs_writel(sf->base, 0xf0000); | |
1848 | ar = 0xf3; | |
1849 | } else | |
1850 | ar = vmx_segment_access_rights(var); | |
3a624e29 NK |
1851 | |
1852 | /* | |
1853 | * Fix the "Accessed" bit in AR field of segment registers for older | |
1854 | * qemu binaries. | |
1855 | * IA32 arch specifies that at the time of processor reset the | |
1856 | * "Accessed" bit in the AR field of segment registers is 1. And qemu | |
1857 | * is setting it to 0 in the usedland code. This causes invalid guest | |
1858 | * state vmexit when "unrestricted guest" mode is turned on. | |
1859 | * Fix for this setup issue in cpu_reset is being pushed in the qemu | |
1860 | * tree. Newer qemu binaries with that qemu fix would not need this | |
1861 | * kvm hack. | |
1862 | */ | |
1863 | if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR)) | |
1864 | ar |= 0x1; /* Accessed */ | |
1865 | ||
6aa8b732 AK |
1866 | vmcs_write32(sf->ar_bytes, ar); |
1867 | } | |
1868 | ||
6aa8b732 AK |
1869 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
1870 | { | |
1871 | u32 ar = vmcs_read32(GUEST_CS_AR_BYTES); | |
1872 | ||
1873 | *db = (ar >> 14) & 1; | |
1874 | *l = (ar >> 13) & 1; | |
1875 | } | |
1876 | ||
1877 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1878 | { | |
1879 | dt->limit = vmcs_read32(GUEST_IDTR_LIMIT); | |
1880 | dt->base = vmcs_readl(GUEST_IDTR_BASE); | |
1881 | } | |
1882 | ||
1883 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1884 | { | |
1885 | vmcs_write32(GUEST_IDTR_LIMIT, dt->limit); | |
1886 | vmcs_writel(GUEST_IDTR_BASE, dt->base); | |
1887 | } | |
1888 | ||
1889 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1890 | { | |
1891 | dt->limit = vmcs_read32(GUEST_GDTR_LIMIT); | |
1892 | dt->base = vmcs_readl(GUEST_GDTR_BASE); | |
1893 | } | |
1894 | ||
1895 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
1896 | { | |
1897 | vmcs_write32(GUEST_GDTR_LIMIT, dt->limit); | |
1898 | vmcs_writel(GUEST_GDTR_BASE, dt->base); | |
1899 | } | |
1900 | ||
648dfaa7 MG |
1901 | static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg) |
1902 | { | |
1903 | struct kvm_segment var; | |
1904 | u32 ar; | |
1905 | ||
1906 | vmx_get_segment(vcpu, &var, seg); | |
1907 | ar = vmx_segment_access_rights(&var); | |
1908 | ||
1909 | if (var.base != (var.selector << 4)) | |
1910 | return false; | |
1911 | if (var.limit != 0xffff) | |
1912 | return false; | |
1913 | if (ar != 0xf3) | |
1914 | return false; | |
1915 | ||
1916 | return true; | |
1917 | } | |
1918 | ||
1919 | static bool code_segment_valid(struct kvm_vcpu *vcpu) | |
1920 | { | |
1921 | struct kvm_segment cs; | |
1922 | unsigned int cs_rpl; | |
1923 | ||
1924 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
1925 | cs_rpl = cs.selector & SELECTOR_RPL_MASK; | |
1926 | ||
1872a3f4 AK |
1927 | if (cs.unusable) |
1928 | return false; | |
648dfaa7 MG |
1929 | if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK)) |
1930 | return false; | |
1931 | if (!cs.s) | |
1932 | return false; | |
1872a3f4 | 1933 | if (cs.type & AR_TYPE_WRITEABLE_MASK) { |
648dfaa7 MG |
1934 | if (cs.dpl > cs_rpl) |
1935 | return false; | |
1872a3f4 | 1936 | } else { |
648dfaa7 MG |
1937 | if (cs.dpl != cs_rpl) |
1938 | return false; | |
1939 | } | |
1940 | if (!cs.present) | |
1941 | return false; | |
1942 | ||
1943 | /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */ | |
1944 | return true; | |
1945 | } | |
1946 | ||
1947 | static bool stack_segment_valid(struct kvm_vcpu *vcpu) | |
1948 | { | |
1949 | struct kvm_segment ss; | |
1950 | unsigned int ss_rpl; | |
1951 | ||
1952 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
1953 | ss_rpl = ss.selector & SELECTOR_RPL_MASK; | |
1954 | ||
1872a3f4 AK |
1955 | if (ss.unusable) |
1956 | return true; | |
1957 | if (ss.type != 3 && ss.type != 7) | |
648dfaa7 MG |
1958 | return false; |
1959 | if (!ss.s) | |
1960 | return false; | |
1961 | if (ss.dpl != ss_rpl) /* DPL != RPL */ | |
1962 | return false; | |
1963 | if (!ss.present) | |
1964 | return false; | |
1965 | ||
1966 | return true; | |
1967 | } | |
1968 | ||
1969 | static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg) | |
1970 | { | |
1971 | struct kvm_segment var; | |
1972 | unsigned int rpl; | |
1973 | ||
1974 | vmx_get_segment(vcpu, &var, seg); | |
1975 | rpl = var.selector & SELECTOR_RPL_MASK; | |
1976 | ||
1872a3f4 AK |
1977 | if (var.unusable) |
1978 | return true; | |
648dfaa7 MG |
1979 | if (!var.s) |
1980 | return false; | |
1981 | if (!var.present) | |
1982 | return false; | |
1983 | if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) { | |
1984 | if (var.dpl < rpl) /* DPL < RPL */ | |
1985 | return false; | |
1986 | } | |
1987 | ||
1988 | /* TODO: Add other members to kvm_segment_field to allow checking for other access | |
1989 | * rights flags | |
1990 | */ | |
1991 | return true; | |
1992 | } | |
1993 | ||
1994 | static bool tr_valid(struct kvm_vcpu *vcpu) | |
1995 | { | |
1996 | struct kvm_segment tr; | |
1997 | ||
1998 | vmx_get_segment(vcpu, &tr, VCPU_SREG_TR); | |
1999 | ||
1872a3f4 AK |
2000 | if (tr.unusable) |
2001 | return false; | |
648dfaa7 MG |
2002 | if (tr.selector & SELECTOR_TI_MASK) /* TI = 1 */ |
2003 | return false; | |
1872a3f4 | 2004 | if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */ |
648dfaa7 MG |
2005 | return false; |
2006 | if (!tr.present) | |
2007 | return false; | |
2008 | ||
2009 | return true; | |
2010 | } | |
2011 | ||
2012 | static bool ldtr_valid(struct kvm_vcpu *vcpu) | |
2013 | { | |
2014 | struct kvm_segment ldtr; | |
2015 | ||
2016 | vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR); | |
2017 | ||
1872a3f4 AK |
2018 | if (ldtr.unusable) |
2019 | return true; | |
648dfaa7 MG |
2020 | if (ldtr.selector & SELECTOR_TI_MASK) /* TI = 1 */ |
2021 | return false; | |
2022 | if (ldtr.type != 2) | |
2023 | return false; | |
2024 | if (!ldtr.present) | |
2025 | return false; | |
2026 | ||
2027 | return true; | |
2028 | } | |
2029 | ||
2030 | static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu) | |
2031 | { | |
2032 | struct kvm_segment cs, ss; | |
2033 | ||
2034 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
2035 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
2036 | ||
2037 | return ((cs.selector & SELECTOR_RPL_MASK) == | |
2038 | (ss.selector & SELECTOR_RPL_MASK)); | |
2039 | } | |
2040 | ||
2041 | /* | |
2042 | * Check if guest state is valid. Returns true if valid, false if | |
2043 | * not. | |
2044 | * We assume that registers are always usable | |
2045 | */ | |
2046 | static bool guest_state_valid(struct kvm_vcpu *vcpu) | |
2047 | { | |
2048 | /* real mode guest state checks */ | |
2049 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) { | |
2050 | if (!rmode_segment_valid(vcpu, VCPU_SREG_CS)) | |
2051 | return false; | |
2052 | if (!rmode_segment_valid(vcpu, VCPU_SREG_SS)) | |
2053 | return false; | |
2054 | if (!rmode_segment_valid(vcpu, VCPU_SREG_DS)) | |
2055 | return false; | |
2056 | if (!rmode_segment_valid(vcpu, VCPU_SREG_ES)) | |
2057 | return false; | |
2058 | if (!rmode_segment_valid(vcpu, VCPU_SREG_FS)) | |
2059 | return false; | |
2060 | if (!rmode_segment_valid(vcpu, VCPU_SREG_GS)) | |
2061 | return false; | |
2062 | } else { | |
2063 | /* protected mode guest state checks */ | |
2064 | if (!cs_ss_rpl_check(vcpu)) | |
2065 | return false; | |
2066 | if (!code_segment_valid(vcpu)) | |
2067 | return false; | |
2068 | if (!stack_segment_valid(vcpu)) | |
2069 | return false; | |
2070 | if (!data_segment_valid(vcpu, VCPU_SREG_DS)) | |
2071 | return false; | |
2072 | if (!data_segment_valid(vcpu, VCPU_SREG_ES)) | |
2073 | return false; | |
2074 | if (!data_segment_valid(vcpu, VCPU_SREG_FS)) | |
2075 | return false; | |
2076 | if (!data_segment_valid(vcpu, VCPU_SREG_GS)) | |
2077 | return false; | |
2078 | if (!tr_valid(vcpu)) | |
2079 | return false; | |
2080 | if (!ldtr_valid(vcpu)) | |
2081 | return false; | |
2082 | } | |
2083 | /* TODO: | |
2084 | * - Add checks on RIP | |
2085 | * - Add checks on RFLAGS | |
2086 | */ | |
2087 | ||
2088 | return true; | |
2089 | } | |
2090 | ||
d77c26fc | 2091 | static int init_rmode_tss(struct kvm *kvm) |
6aa8b732 | 2092 | { |
6aa8b732 | 2093 | gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT; |
195aefde | 2094 | u16 data = 0; |
10589a46 | 2095 | int ret = 0; |
195aefde | 2096 | int r; |
6aa8b732 | 2097 | |
195aefde IE |
2098 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
2099 | if (r < 0) | |
10589a46 | 2100 | goto out; |
195aefde | 2101 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
464d17c8 SY |
2102 | r = kvm_write_guest_page(kvm, fn++, &data, |
2103 | TSS_IOPB_BASE_OFFSET, sizeof(u16)); | |
195aefde | 2104 | if (r < 0) |
10589a46 | 2105 | goto out; |
195aefde IE |
2106 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
2107 | if (r < 0) | |
10589a46 | 2108 | goto out; |
195aefde IE |
2109 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
2110 | if (r < 0) | |
10589a46 | 2111 | goto out; |
195aefde | 2112 | data = ~0; |
10589a46 MT |
2113 | r = kvm_write_guest_page(kvm, fn, &data, |
2114 | RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, | |
2115 | sizeof(u8)); | |
195aefde | 2116 | if (r < 0) |
10589a46 MT |
2117 | goto out; |
2118 | ||
2119 | ret = 1; | |
2120 | out: | |
10589a46 | 2121 | return ret; |
6aa8b732 AK |
2122 | } |
2123 | ||
b7ebfb05 SY |
2124 | static int init_rmode_identity_map(struct kvm *kvm) |
2125 | { | |
2126 | int i, r, ret; | |
2127 | pfn_t identity_map_pfn; | |
2128 | u32 tmp; | |
2129 | ||
089d034e | 2130 | if (!enable_ept) |
b7ebfb05 SY |
2131 | return 1; |
2132 | if (unlikely(!kvm->arch.ept_identity_pagetable)) { | |
2133 | printk(KERN_ERR "EPT: identity-mapping pagetable " | |
2134 | "haven't been allocated!\n"); | |
2135 | return 0; | |
2136 | } | |
2137 | if (likely(kvm->arch.ept_identity_pagetable_done)) | |
2138 | return 1; | |
2139 | ret = 0; | |
b927a3ce | 2140 | identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT; |
b7ebfb05 SY |
2141 | r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE); |
2142 | if (r < 0) | |
2143 | goto out; | |
2144 | /* Set up identity-mapping pagetable for EPT in real mode */ | |
2145 | for (i = 0; i < PT32_ENT_PER_PAGE; i++) { | |
2146 | tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | | |
2147 | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE); | |
2148 | r = kvm_write_guest_page(kvm, identity_map_pfn, | |
2149 | &tmp, i * sizeof(tmp), sizeof(tmp)); | |
2150 | if (r < 0) | |
2151 | goto out; | |
2152 | } | |
2153 | kvm->arch.ept_identity_pagetable_done = true; | |
2154 | ret = 1; | |
2155 | out: | |
2156 | return ret; | |
2157 | } | |
2158 | ||
6aa8b732 AK |
2159 | static void seg_setup(int seg) |
2160 | { | |
2161 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
3a624e29 | 2162 | unsigned int ar; |
6aa8b732 AK |
2163 | |
2164 | vmcs_write16(sf->selector, 0); | |
2165 | vmcs_writel(sf->base, 0); | |
2166 | vmcs_write32(sf->limit, 0xffff); | |
3a624e29 NK |
2167 | if (enable_unrestricted_guest) { |
2168 | ar = 0x93; | |
2169 | if (seg == VCPU_SREG_CS) | |
2170 | ar |= 0x08; /* code segment */ | |
2171 | } else | |
2172 | ar = 0xf3; | |
2173 | ||
2174 | vmcs_write32(sf->ar_bytes, ar); | |
6aa8b732 AK |
2175 | } |
2176 | ||
f78e0e2e SY |
2177 | static int alloc_apic_access_page(struct kvm *kvm) |
2178 | { | |
2179 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2180 | int r = 0; | |
2181 | ||
72dc67a6 | 2182 | down_write(&kvm->slots_lock); |
bfc6d222 | 2183 | if (kvm->arch.apic_access_page) |
f78e0e2e SY |
2184 | goto out; |
2185 | kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; | |
2186 | kvm_userspace_mem.flags = 0; | |
2187 | kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL; | |
2188 | kvm_userspace_mem.memory_size = PAGE_SIZE; | |
2189 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2190 | if (r) | |
2191 | goto out; | |
72dc67a6 | 2192 | |
bfc6d222 | 2193 | kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00); |
f78e0e2e | 2194 | out: |
72dc67a6 | 2195 | up_write(&kvm->slots_lock); |
f78e0e2e SY |
2196 | return r; |
2197 | } | |
2198 | ||
b7ebfb05 SY |
2199 | static int alloc_identity_pagetable(struct kvm *kvm) |
2200 | { | |
2201 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2202 | int r = 0; | |
2203 | ||
2204 | down_write(&kvm->slots_lock); | |
2205 | if (kvm->arch.ept_identity_pagetable) | |
2206 | goto out; | |
2207 | kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; | |
2208 | kvm_userspace_mem.flags = 0; | |
b927a3ce SY |
2209 | kvm_userspace_mem.guest_phys_addr = |
2210 | kvm->arch.ept_identity_map_addr; | |
b7ebfb05 SY |
2211 | kvm_userspace_mem.memory_size = PAGE_SIZE; |
2212 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2213 | if (r) | |
2214 | goto out; | |
2215 | ||
b7ebfb05 | 2216 | kvm->arch.ept_identity_pagetable = gfn_to_page(kvm, |
b927a3ce | 2217 | kvm->arch.ept_identity_map_addr >> PAGE_SHIFT); |
b7ebfb05 SY |
2218 | out: |
2219 | up_write(&kvm->slots_lock); | |
2220 | return r; | |
2221 | } | |
2222 | ||
2384d2b3 SY |
2223 | static void allocate_vpid(struct vcpu_vmx *vmx) |
2224 | { | |
2225 | int vpid; | |
2226 | ||
2227 | vmx->vpid = 0; | |
919818ab | 2228 | if (!enable_vpid) |
2384d2b3 SY |
2229 | return; |
2230 | spin_lock(&vmx_vpid_lock); | |
2231 | vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS); | |
2232 | if (vpid < VMX_NR_VPIDS) { | |
2233 | vmx->vpid = vpid; | |
2234 | __set_bit(vpid, vmx_vpid_bitmap); | |
2235 | } | |
2236 | spin_unlock(&vmx_vpid_lock); | |
2237 | } | |
2238 | ||
5897297b | 2239 | static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, u32 msr) |
25c5f225 | 2240 | { |
3e7c73e9 | 2241 | int f = sizeof(unsigned long); |
25c5f225 SY |
2242 | |
2243 | if (!cpu_has_vmx_msr_bitmap()) | |
2244 | return; | |
2245 | ||
2246 | /* | |
2247 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
2248 | * have the write-low and read-high bitmap offsets the wrong way round. | |
2249 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
2250 | */ | |
25c5f225 | 2251 | if (msr <= 0x1fff) { |
3e7c73e9 AK |
2252 | __clear_bit(msr, msr_bitmap + 0x000 / f); /* read-low */ |
2253 | __clear_bit(msr, msr_bitmap + 0x800 / f); /* write-low */ | |
25c5f225 SY |
2254 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { |
2255 | msr &= 0x1fff; | |
3e7c73e9 AK |
2256 | __clear_bit(msr, msr_bitmap + 0x400 / f); /* read-high */ |
2257 | __clear_bit(msr, msr_bitmap + 0xc00 / f); /* write-high */ | |
25c5f225 | 2258 | } |
25c5f225 SY |
2259 | } |
2260 | ||
5897297b AK |
2261 | static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only) |
2262 | { | |
2263 | if (!longmode_only) | |
2264 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy, msr); | |
2265 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode, msr); | |
2266 | } | |
2267 | ||
6aa8b732 AK |
2268 | /* |
2269 | * Sets up the vmcs for emulated real mode. | |
2270 | */ | |
8b9cf98c | 2271 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
6aa8b732 | 2272 | { |
468d472f | 2273 | u32 host_sysenter_cs, msr_low, msr_high; |
6aa8b732 | 2274 | u32 junk; |
53f658b3 | 2275 | u64 host_pat, tsc_this, tsc_base; |
6aa8b732 AK |
2276 | unsigned long a; |
2277 | struct descriptor_table dt; | |
2278 | int i; | |
cd2276a7 | 2279 | unsigned long kvm_vmx_return; |
6e5d865c | 2280 | u32 exec_control; |
6aa8b732 | 2281 | |
6aa8b732 | 2282 | /* I/O */ |
3e7c73e9 AK |
2283 | vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a)); |
2284 | vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b)); | |
6aa8b732 | 2285 | |
25c5f225 | 2286 | if (cpu_has_vmx_msr_bitmap()) |
5897297b | 2287 | vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy)); |
25c5f225 | 2288 | |
6aa8b732 AK |
2289 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
2290 | ||
6aa8b732 | 2291 | /* Control */ |
1c3d14fe YS |
2292 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, |
2293 | vmcs_config.pin_based_exec_ctrl); | |
6e5d865c YS |
2294 | |
2295 | exec_control = vmcs_config.cpu_based_exec_ctrl; | |
2296 | if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { | |
2297 | exec_control &= ~CPU_BASED_TPR_SHADOW; | |
2298 | #ifdef CONFIG_X86_64 | |
2299 | exec_control |= CPU_BASED_CR8_STORE_EXITING | | |
2300 | CPU_BASED_CR8_LOAD_EXITING; | |
2301 | #endif | |
2302 | } | |
089d034e | 2303 | if (!enable_ept) |
d56f546d | 2304 | exec_control |= CPU_BASED_CR3_STORE_EXITING | |
83dbc83a MT |
2305 | CPU_BASED_CR3_LOAD_EXITING | |
2306 | CPU_BASED_INVLPG_EXITING; | |
6e5d865c | 2307 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); |
6aa8b732 | 2308 | |
83ff3b9d SY |
2309 | if (cpu_has_secondary_exec_ctrls()) { |
2310 | exec_control = vmcs_config.cpu_based_2nd_exec_ctrl; | |
2311 | if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
2312 | exec_control &= | |
2313 | ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
2384d2b3 SY |
2314 | if (vmx->vpid == 0) |
2315 | exec_control &= ~SECONDARY_EXEC_ENABLE_VPID; | |
089d034e | 2316 | if (!enable_ept) |
d56f546d | 2317 | exec_control &= ~SECONDARY_EXEC_ENABLE_EPT; |
3a624e29 NK |
2318 | if (!enable_unrestricted_guest) |
2319 | exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
4b8d54f9 ZE |
2320 | if (!ple_gap) |
2321 | exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
83ff3b9d SY |
2322 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); |
2323 | } | |
f78e0e2e | 2324 | |
4b8d54f9 ZE |
2325 | if (ple_gap) { |
2326 | vmcs_write32(PLE_GAP, ple_gap); | |
2327 | vmcs_write32(PLE_WINDOW, ple_window); | |
2328 | } | |
2329 | ||
c7addb90 AK |
2330 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf); |
2331 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf); | |
6aa8b732 AK |
2332 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
2333 | ||
2334 | vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */ | |
2335 | vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */ | |
2336 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ | |
2337 | ||
2338 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ | |
2339 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
2340 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
d6e88aec AK |
2341 | vmcs_write16(HOST_FS_SELECTOR, kvm_read_fs()); /* 22.2.4 */ |
2342 | vmcs_write16(HOST_GS_SELECTOR, kvm_read_gs()); /* 22.2.4 */ | |
6aa8b732 | 2343 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
05b3e0c2 | 2344 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2345 | rdmsrl(MSR_FS_BASE, a); |
2346 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ | |
2347 | rdmsrl(MSR_GS_BASE, a); | |
2348 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ | |
2349 | #else | |
2350 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ | |
2351 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ | |
2352 | #endif | |
2353 | ||
2354 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ | |
2355 | ||
d6e88aec | 2356 | kvm_get_idt(&dt); |
6aa8b732 AK |
2357 | vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */ |
2358 | ||
d77c26fc | 2359 | asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return)); |
cd2276a7 | 2360 | vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */ |
2cc51560 ED |
2361 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
2362 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); | |
2363 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); | |
6aa8b732 AK |
2364 | |
2365 | rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk); | |
2366 | vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs); | |
2367 | rdmsrl(MSR_IA32_SYSENTER_ESP, a); | |
2368 | vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */ | |
2369 | rdmsrl(MSR_IA32_SYSENTER_EIP, a); | |
2370 | vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */ | |
2371 | ||
468d472f SY |
2372 | if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) { |
2373 | rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high); | |
2374 | host_pat = msr_low | ((u64) msr_high << 32); | |
2375 | vmcs_write64(HOST_IA32_PAT, host_pat); | |
2376 | } | |
2377 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { | |
2378 | rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high); | |
2379 | host_pat = msr_low | ((u64) msr_high << 32); | |
2380 | /* Write the default value follow host pat */ | |
2381 | vmcs_write64(GUEST_IA32_PAT, host_pat); | |
2382 | /* Keep arch.pat sync with GUEST_IA32_PAT */ | |
2383 | vmx->vcpu.arch.pat = host_pat; | |
2384 | } | |
2385 | ||
6aa8b732 AK |
2386 | for (i = 0; i < NR_VMX_MSR; ++i) { |
2387 | u32 index = vmx_msr_index[i]; | |
2388 | u32 data_low, data_high; | |
2389 | u64 data; | |
a2fa3e9f | 2390 | int j = vmx->nmsrs; |
6aa8b732 AK |
2391 | |
2392 | if (rdmsr_safe(index, &data_low, &data_high) < 0) | |
2393 | continue; | |
432bd6cb AK |
2394 | if (wrmsr_safe(index, data_low, data_high) < 0) |
2395 | continue; | |
6aa8b732 | 2396 | data = data_low | ((u64)data_high << 32); |
26bb0981 AK |
2397 | vmx->guest_msrs[j].index = i; |
2398 | vmx->guest_msrs[j].data = 0; | |
a2fa3e9f | 2399 | ++vmx->nmsrs; |
6aa8b732 | 2400 | } |
6aa8b732 | 2401 | |
1c3d14fe | 2402 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
6aa8b732 AK |
2403 | |
2404 | /* 22.2.1, 20.8.1 */ | |
1c3d14fe YS |
2405 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl); |
2406 | ||
e00c8cf2 AK |
2407 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
2408 | vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK); | |
2409 | ||
53f658b3 MT |
2410 | tsc_base = vmx->vcpu.kvm->arch.vm_init_tsc; |
2411 | rdtscll(tsc_this); | |
2412 | if (tsc_this < vmx->vcpu.kvm->arch.vm_init_tsc) | |
2413 | tsc_base = tsc_this; | |
2414 | ||
2415 | guest_write_tsc(0, tsc_base); | |
f78e0e2e | 2416 | |
e00c8cf2 AK |
2417 | return 0; |
2418 | } | |
2419 | ||
b7ebfb05 SY |
2420 | static int init_rmode(struct kvm *kvm) |
2421 | { | |
2422 | if (!init_rmode_tss(kvm)) | |
2423 | return 0; | |
2424 | if (!init_rmode_identity_map(kvm)) | |
2425 | return 0; | |
2426 | return 1; | |
2427 | } | |
2428 | ||
e00c8cf2 AK |
2429 | static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) |
2430 | { | |
2431 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
2432 | u64 msr; | |
2433 | int ret; | |
2434 | ||
5fdbf976 | 2435 | vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)); |
3200f405 | 2436 | down_read(&vcpu->kvm->slots_lock); |
b7ebfb05 | 2437 | if (!init_rmode(vmx->vcpu.kvm)) { |
e00c8cf2 AK |
2438 | ret = -ENOMEM; |
2439 | goto out; | |
2440 | } | |
2441 | ||
7ffd92c5 | 2442 | vmx->rmode.vm86_active = 0; |
e00c8cf2 | 2443 | |
3b86cd99 JK |
2444 | vmx->soft_vnmi_blocked = 0; |
2445 | ||
ad312c7c | 2446 | vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
2d3ad1f4 | 2447 | kvm_set_cr8(&vmx->vcpu, 0); |
e00c8cf2 | 2448 | msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
c5af89b6 | 2449 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) |
e00c8cf2 AK |
2450 | msr |= MSR_IA32_APICBASE_BSP; |
2451 | kvm_set_apic_base(&vmx->vcpu, msr); | |
2452 | ||
2453 | fx_init(&vmx->vcpu); | |
2454 | ||
5706be0d | 2455 | seg_setup(VCPU_SREG_CS); |
e00c8cf2 AK |
2456 | /* |
2457 | * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode | |
2458 | * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh. | |
2459 | */ | |
c5af89b6 | 2460 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) { |
e00c8cf2 AK |
2461 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); |
2462 | vmcs_writel(GUEST_CS_BASE, 0x000f0000); | |
2463 | } else { | |
ad312c7c ZX |
2464 | vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8); |
2465 | vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12); | |
e00c8cf2 | 2466 | } |
e00c8cf2 AK |
2467 | |
2468 | seg_setup(VCPU_SREG_DS); | |
2469 | seg_setup(VCPU_SREG_ES); | |
2470 | seg_setup(VCPU_SREG_FS); | |
2471 | seg_setup(VCPU_SREG_GS); | |
2472 | seg_setup(VCPU_SREG_SS); | |
2473 | ||
2474 | vmcs_write16(GUEST_TR_SELECTOR, 0); | |
2475 | vmcs_writel(GUEST_TR_BASE, 0); | |
2476 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); | |
2477 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); | |
2478 | ||
2479 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); | |
2480 | vmcs_writel(GUEST_LDTR_BASE, 0); | |
2481 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); | |
2482 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); | |
2483 | ||
2484 | vmcs_write32(GUEST_SYSENTER_CS, 0); | |
2485 | vmcs_writel(GUEST_SYSENTER_ESP, 0); | |
2486 | vmcs_writel(GUEST_SYSENTER_EIP, 0); | |
2487 | ||
2488 | vmcs_writel(GUEST_RFLAGS, 0x02); | |
c5af89b6 | 2489 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) |
5fdbf976 | 2490 | kvm_rip_write(vcpu, 0xfff0); |
e00c8cf2 | 2491 | else |
5fdbf976 MT |
2492 | kvm_rip_write(vcpu, 0); |
2493 | kvm_register_write(vcpu, VCPU_REGS_RSP, 0); | |
e00c8cf2 | 2494 | |
e00c8cf2 AK |
2495 | vmcs_writel(GUEST_DR7, 0x400); |
2496 | ||
2497 | vmcs_writel(GUEST_GDTR_BASE, 0); | |
2498 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); | |
2499 | ||
2500 | vmcs_writel(GUEST_IDTR_BASE, 0); | |
2501 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); | |
2502 | ||
2503 | vmcs_write32(GUEST_ACTIVITY_STATE, 0); | |
2504 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); | |
2505 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); | |
2506 | ||
e00c8cf2 AK |
2507 | /* Special registers */ |
2508 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
2509 | ||
2510 | setup_msrs(vmx); | |
2511 | ||
6aa8b732 AK |
2512 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
2513 | ||
f78e0e2e SY |
2514 | if (cpu_has_vmx_tpr_shadow()) { |
2515 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); | |
2516 | if (vm_need_tpr_shadow(vmx->vcpu.kvm)) | |
2517 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, | |
ad312c7c | 2518 | page_to_phys(vmx->vcpu.arch.apic->regs_page)); |
f78e0e2e SY |
2519 | vmcs_write32(TPR_THRESHOLD, 0); |
2520 | } | |
2521 | ||
2522 | if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
2523 | vmcs_write64(APIC_ACCESS_ADDR, | |
bfc6d222 | 2524 | page_to_phys(vmx->vcpu.kvm->arch.apic_access_page)); |
6aa8b732 | 2525 | |
2384d2b3 SY |
2526 | if (vmx->vpid != 0) |
2527 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
2528 | ||
fa40052c | 2529 | vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET; |
ad312c7c | 2530 | vmx_set_cr0(&vmx->vcpu, vmx->vcpu.arch.cr0); /* enter rmode */ |
8b9cf98c | 2531 | vmx_set_cr4(&vmx->vcpu, 0); |
8b9cf98c | 2532 | vmx_set_efer(&vmx->vcpu, 0); |
8b9cf98c RR |
2533 | vmx_fpu_activate(&vmx->vcpu); |
2534 | update_exception_bitmap(&vmx->vcpu); | |
6aa8b732 | 2535 | |
2384d2b3 SY |
2536 | vpid_sync_vcpu_all(vmx); |
2537 | ||
3200f405 | 2538 | ret = 0; |
6aa8b732 | 2539 | |
a89a8fb9 MG |
2540 | /* HACK: Don't enable emulation on guest boot/reset */ |
2541 | vmx->emulation_required = 0; | |
2542 | ||
6aa8b732 | 2543 | out: |
3200f405 | 2544 | up_read(&vcpu->kvm->slots_lock); |
6aa8b732 AK |
2545 | return ret; |
2546 | } | |
2547 | ||
3b86cd99 JK |
2548 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
2549 | { | |
2550 | u32 cpu_based_vm_exec_control; | |
2551 | ||
2552 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
2553 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; | |
2554 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2555 | } | |
2556 | ||
2557 | static void enable_nmi_window(struct kvm_vcpu *vcpu) | |
2558 | { | |
2559 | u32 cpu_based_vm_exec_control; | |
2560 | ||
2561 | if (!cpu_has_virtual_nmis()) { | |
2562 | enable_irq_window(vcpu); | |
2563 | return; | |
2564 | } | |
2565 | ||
2566 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
2567 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING; | |
2568 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2569 | } | |
2570 | ||
66fd3f7f | 2571 | static void vmx_inject_irq(struct kvm_vcpu *vcpu) |
85f455f7 | 2572 | { |
9c8cba37 | 2573 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
66fd3f7f GN |
2574 | uint32_t intr; |
2575 | int irq = vcpu->arch.interrupt.nr; | |
9c8cba37 | 2576 | |
229456fc | 2577 | trace_kvm_inj_virq(irq); |
2714d1d3 | 2578 | |
fa89a817 | 2579 | ++vcpu->stat.irq_injections; |
7ffd92c5 | 2580 | if (vmx->rmode.vm86_active) { |
9c8cba37 AK |
2581 | vmx->rmode.irq.pending = true; |
2582 | vmx->rmode.irq.vector = irq; | |
5fdbf976 | 2583 | vmx->rmode.irq.rip = kvm_rip_read(vcpu); |
ae0bb3e0 GN |
2584 | if (vcpu->arch.interrupt.soft) |
2585 | vmx->rmode.irq.rip += | |
2586 | vmx->vcpu.arch.event_exit_inst_len; | |
9c5623e3 AK |
2587 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
2588 | irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK); | |
2589 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1); | |
5fdbf976 | 2590 | kvm_rip_write(vcpu, vmx->rmode.irq.rip - 1); |
85f455f7 ED |
2591 | return; |
2592 | } | |
66fd3f7f GN |
2593 | intr = irq | INTR_INFO_VALID_MASK; |
2594 | if (vcpu->arch.interrupt.soft) { | |
2595 | intr |= INTR_TYPE_SOFT_INTR; | |
2596 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
2597 | vmx->vcpu.arch.event_exit_inst_len); | |
2598 | } else | |
2599 | intr |= INTR_TYPE_EXT_INTR; | |
2600 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr); | |
85f455f7 ED |
2601 | } |
2602 | ||
f08864b4 SY |
2603 | static void vmx_inject_nmi(struct kvm_vcpu *vcpu) |
2604 | { | |
66a5a347 JK |
2605 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2606 | ||
3b86cd99 JK |
2607 | if (!cpu_has_virtual_nmis()) { |
2608 | /* | |
2609 | * Tracking the NMI-blocked state in software is built upon | |
2610 | * finding the next open IRQ window. This, in turn, depends on | |
2611 | * well-behaving guests: They have to keep IRQs disabled at | |
2612 | * least as long as the NMI handler runs. Otherwise we may | |
2613 | * cause NMI nesting, maybe breaking the guest. But as this is | |
2614 | * highly unlikely, we can live with the residual risk. | |
2615 | */ | |
2616 | vmx->soft_vnmi_blocked = 1; | |
2617 | vmx->vnmi_blocked_time = 0; | |
2618 | } | |
2619 | ||
487b391d | 2620 | ++vcpu->stat.nmi_injections; |
7ffd92c5 | 2621 | if (vmx->rmode.vm86_active) { |
66a5a347 JK |
2622 | vmx->rmode.irq.pending = true; |
2623 | vmx->rmode.irq.vector = NMI_VECTOR; | |
2624 | vmx->rmode.irq.rip = kvm_rip_read(vcpu); | |
2625 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, | |
2626 | NMI_VECTOR | INTR_TYPE_SOFT_INTR | | |
2627 | INTR_INFO_VALID_MASK); | |
2628 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1); | |
2629 | kvm_rip_write(vcpu, vmx->rmode.irq.rip - 1); | |
2630 | return; | |
2631 | } | |
f08864b4 SY |
2632 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
2633 | INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR); | |
f08864b4 SY |
2634 | } |
2635 | ||
c4282df9 | 2636 | static int vmx_nmi_allowed(struct kvm_vcpu *vcpu) |
33f089ca | 2637 | { |
3b86cd99 | 2638 | if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked) |
c4282df9 | 2639 | return 0; |
33f089ca | 2640 | |
c4282df9 GN |
2641 | return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & |
2642 | (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS | | |
2643 | GUEST_INTR_STATE_NMI)); | |
33f089ca JK |
2644 | } |
2645 | ||
78646121 GN |
2646 | static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu) |
2647 | { | |
c4282df9 GN |
2648 | return (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
2649 | !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & | |
2650 | (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)); | |
78646121 GN |
2651 | } |
2652 | ||
cbc94022 IE |
2653 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
2654 | { | |
2655 | int ret; | |
2656 | struct kvm_userspace_memory_region tss_mem = { | |
6fe63979 | 2657 | .slot = TSS_PRIVATE_MEMSLOT, |
cbc94022 IE |
2658 | .guest_phys_addr = addr, |
2659 | .memory_size = PAGE_SIZE * 3, | |
2660 | .flags = 0, | |
2661 | }; | |
2662 | ||
2663 | ret = kvm_set_memory_region(kvm, &tss_mem, 0); | |
2664 | if (ret) | |
2665 | return ret; | |
bfc6d222 | 2666 | kvm->arch.tss_addr = addr; |
cbc94022 IE |
2667 | return 0; |
2668 | } | |
2669 | ||
6aa8b732 AK |
2670 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, |
2671 | int vec, u32 err_code) | |
2672 | { | |
b3f37707 NK |
2673 | /* |
2674 | * Instruction with address size override prefix opcode 0x67 | |
2675 | * Cause the #SS fault with 0 error code in VM86 mode. | |
2676 | */ | |
2677 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) | |
851ba692 | 2678 | if (emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE) |
6aa8b732 | 2679 | return 1; |
77ab6db0 JK |
2680 | /* |
2681 | * Forward all other exceptions that are valid in real mode. | |
2682 | * FIXME: Breaks guest debugging in real mode, needs to be fixed with | |
2683 | * the required debugging infrastructure rework. | |
2684 | */ | |
2685 | switch (vec) { | |
77ab6db0 | 2686 | case DB_VECTOR: |
d0bfb940 JK |
2687 | if (vcpu->guest_debug & |
2688 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
2689 | return 0; | |
2690 | kvm_queue_exception(vcpu, vec); | |
2691 | return 1; | |
77ab6db0 | 2692 | case BP_VECTOR: |
d0bfb940 JK |
2693 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) |
2694 | return 0; | |
2695 | /* fall through */ | |
2696 | case DE_VECTOR: | |
77ab6db0 JK |
2697 | case OF_VECTOR: |
2698 | case BR_VECTOR: | |
2699 | case UD_VECTOR: | |
2700 | case DF_VECTOR: | |
2701 | case SS_VECTOR: | |
2702 | case GP_VECTOR: | |
2703 | case MF_VECTOR: | |
2704 | kvm_queue_exception(vcpu, vec); | |
2705 | return 1; | |
2706 | } | |
6aa8b732 AK |
2707 | return 0; |
2708 | } | |
2709 | ||
a0861c02 AK |
2710 | /* |
2711 | * Trigger machine check on the host. We assume all the MSRs are already set up | |
2712 | * by the CPU and that we still run on the same CPU as the MCE occurred on. | |
2713 | * We pass a fake environment to the machine check handler because we want | |
2714 | * the guest to be always treated like user space, no matter what context | |
2715 | * it used internally. | |
2716 | */ | |
2717 | static void kvm_machine_check(void) | |
2718 | { | |
2719 | #if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64) | |
2720 | struct pt_regs regs = { | |
2721 | .cs = 3, /* Fake ring 3 no matter what the guest ran on */ | |
2722 | .flags = X86_EFLAGS_IF, | |
2723 | }; | |
2724 | ||
2725 | do_machine_check(®s, 0); | |
2726 | #endif | |
2727 | } | |
2728 | ||
851ba692 | 2729 | static int handle_machine_check(struct kvm_vcpu *vcpu) |
a0861c02 AK |
2730 | { |
2731 | /* already handled by vcpu_run */ | |
2732 | return 1; | |
2733 | } | |
2734 | ||
851ba692 | 2735 | static int handle_exception(struct kvm_vcpu *vcpu) |
6aa8b732 | 2736 | { |
1155f76a | 2737 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
851ba692 | 2738 | struct kvm_run *kvm_run = vcpu->run; |
d0bfb940 | 2739 | u32 intr_info, ex_no, error_code; |
42dbaa5a | 2740 | unsigned long cr2, rip, dr6; |
6aa8b732 AK |
2741 | u32 vect_info; |
2742 | enum emulation_result er; | |
2743 | ||
1155f76a | 2744 | vect_info = vmx->idt_vectoring_info; |
6aa8b732 AK |
2745 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
2746 | ||
a0861c02 | 2747 | if (is_machine_check(intr_info)) |
851ba692 | 2748 | return handle_machine_check(vcpu); |
a0861c02 | 2749 | |
6aa8b732 | 2750 | if ((vect_info & VECTORING_INFO_VALID_MASK) && |
d77c26fc | 2751 | !is_page_fault(intr_info)) |
6aa8b732 | 2752 | printk(KERN_ERR "%s: unexpected, vectoring info 0x%x " |
b8688d51 | 2753 | "intr info 0x%x\n", __func__, vect_info, intr_info); |
6aa8b732 | 2754 | |
e4a41889 | 2755 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR) |
1b6269db | 2756 | return 1; /* already handled by vmx_vcpu_run() */ |
2ab455cc AL |
2757 | |
2758 | if (is_no_device(intr_info)) { | |
5fd86fcf | 2759 | vmx_fpu_activate(vcpu); |
2ab455cc AL |
2760 | return 1; |
2761 | } | |
2762 | ||
7aa81cc0 | 2763 | if (is_invalid_opcode(intr_info)) { |
851ba692 | 2764 | er = emulate_instruction(vcpu, 0, 0, EMULTYPE_TRAP_UD); |
7aa81cc0 | 2765 | if (er != EMULATE_DONE) |
7ee5d940 | 2766 | kvm_queue_exception(vcpu, UD_VECTOR); |
7aa81cc0 AL |
2767 | return 1; |
2768 | } | |
2769 | ||
6aa8b732 | 2770 | error_code = 0; |
5fdbf976 | 2771 | rip = kvm_rip_read(vcpu); |
2e11384c | 2772 | if (intr_info & INTR_INFO_DELIVER_CODE_MASK) |
6aa8b732 AK |
2773 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
2774 | if (is_page_fault(intr_info)) { | |
1439442c | 2775 | /* EPT won't cause page fault directly */ |
089d034e | 2776 | if (enable_ept) |
1439442c | 2777 | BUG(); |
6aa8b732 | 2778 | cr2 = vmcs_readl(EXIT_QUALIFICATION); |
229456fc MT |
2779 | trace_kvm_page_fault(cr2, error_code); |
2780 | ||
3298b75c | 2781 | if (kvm_event_needs_reinjection(vcpu)) |
577bdc49 | 2782 | kvm_mmu_unprotect_page_virt(vcpu, cr2); |
3067714c | 2783 | return kvm_mmu_page_fault(vcpu, cr2, error_code); |
6aa8b732 AK |
2784 | } |
2785 | ||
7ffd92c5 | 2786 | if (vmx->rmode.vm86_active && |
6aa8b732 | 2787 | handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK, |
72d6e5a0 | 2788 | error_code)) { |
ad312c7c ZX |
2789 | if (vcpu->arch.halt_request) { |
2790 | vcpu->arch.halt_request = 0; | |
72d6e5a0 AK |
2791 | return kvm_emulate_halt(vcpu); |
2792 | } | |
6aa8b732 | 2793 | return 1; |
72d6e5a0 | 2794 | } |
6aa8b732 | 2795 | |
d0bfb940 | 2796 | ex_no = intr_info & INTR_INFO_VECTOR_MASK; |
42dbaa5a JK |
2797 | switch (ex_no) { |
2798 | case DB_VECTOR: | |
2799 | dr6 = vmcs_readl(EXIT_QUALIFICATION); | |
2800 | if (!(vcpu->guest_debug & | |
2801 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) { | |
2802 | vcpu->arch.dr6 = dr6 | DR6_FIXED_1; | |
2803 | kvm_queue_exception(vcpu, DB_VECTOR); | |
2804 | return 1; | |
2805 | } | |
2806 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1; | |
2807 | kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7); | |
2808 | /* fall through */ | |
2809 | case BP_VECTOR: | |
6aa8b732 | 2810 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
d0bfb940 JK |
2811 | kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip; |
2812 | kvm_run->debug.arch.exception = ex_no; | |
42dbaa5a JK |
2813 | break; |
2814 | default: | |
d0bfb940 JK |
2815 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; |
2816 | kvm_run->ex.exception = ex_no; | |
2817 | kvm_run->ex.error_code = error_code; | |
42dbaa5a | 2818 | break; |
6aa8b732 | 2819 | } |
6aa8b732 AK |
2820 | return 0; |
2821 | } | |
2822 | ||
851ba692 | 2823 | static int handle_external_interrupt(struct kvm_vcpu *vcpu) |
6aa8b732 | 2824 | { |
1165f5fe | 2825 | ++vcpu->stat.irq_exits; |
6aa8b732 AK |
2826 | return 1; |
2827 | } | |
2828 | ||
851ba692 | 2829 | static int handle_triple_fault(struct kvm_vcpu *vcpu) |
988ad74f | 2830 | { |
851ba692 | 2831 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
988ad74f AK |
2832 | return 0; |
2833 | } | |
6aa8b732 | 2834 | |
851ba692 | 2835 | static int handle_io(struct kvm_vcpu *vcpu) |
6aa8b732 | 2836 | { |
bfdaab09 | 2837 | unsigned long exit_qualification; |
34c33d16 | 2838 | int size, in, string; |
039576c0 | 2839 | unsigned port; |
6aa8b732 | 2840 | |
1165f5fe | 2841 | ++vcpu->stat.io_exits; |
bfdaab09 | 2842 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
039576c0 | 2843 | string = (exit_qualification & 16) != 0; |
e70669ab LV |
2844 | |
2845 | if (string) { | |
851ba692 | 2846 | if (emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DO_MMIO) |
e70669ab LV |
2847 | return 0; |
2848 | return 1; | |
2849 | } | |
2850 | ||
2851 | size = (exit_qualification & 7) + 1; | |
2852 | in = (exit_qualification & 8) != 0; | |
039576c0 | 2853 | port = exit_qualification >> 16; |
e70669ab | 2854 | |
e93f36bc | 2855 | skip_emulated_instruction(vcpu); |
851ba692 | 2856 | return kvm_emulate_pio(vcpu, in, size, port); |
6aa8b732 AK |
2857 | } |
2858 | ||
102d8325 IM |
2859 | static void |
2860 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
2861 | { | |
2862 | /* | |
2863 | * Patch in the VMCALL instruction: | |
2864 | */ | |
2865 | hypercall[0] = 0x0f; | |
2866 | hypercall[1] = 0x01; | |
2867 | hypercall[2] = 0xc1; | |
102d8325 IM |
2868 | } |
2869 | ||
851ba692 | 2870 | static int handle_cr(struct kvm_vcpu *vcpu) |
6aa8b732 | 2871 | { |
229456fc | 2872 | unsigned long exit_qualification, val; |
6aa8b732 AK |
2873 | int cr; |
2874 | int reg; | |
2875 | ||
bfdaab09 | 2876 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
6aa8b732 AK |
2877 | cr = exit_qualification & 15; |
2878 | reg = (exit_qualification >> 8) & 15; | |
2879 | switch ((exit_qualification >> 4) & 3) { | |
2880 | case 0: /* mov to cr */ | |
229456fc MT |
2881 | val = kvm_register_read(vcpu, reg); |
2882 | trace_kvm_cr_write(cr, val); | |
6aa8b732 AK |
2883 | switch (cr) { |
2884 | case 0: | |
229456fc | 2885 | kvm_set_cr0(vcpu, val); |
6aa8b732 AK |
2886 | skip_emulated_instruction(vcpu); |
2887 | return 1; | |
2888 | case 3: | |
229456fc | 2889 | kvm_set_cr3(vcpu, val); |
6aa8b732 AK |
2890 | skip_emulated_instruction(vcpu); |
2891 | return 1; | |
2892 | case 4: | |
229456fc | 2893 | kvm_set_cr4(vcpu, val); |
6aa8b732 AK |
2894 | skip_emulated_instruction(vcpu); |
2895 | return 1; | |
0a5fff19 GN |
2896 | case 8: { |
2897 | u8 cr8_prev = kvm_get_cr8(vcpu); | |
2898 | u8 cr8 = kvm_register_read(vcpu, reg); | |
2899 | kvm_set_cr8(vcpu, cr8); | |
2900 | skip_emulated_instruction(vcpu); | |
2901 | if (irqchip_in_kernel(vcpu->kvm)) | |
2902 | return 1; | |
2903 | if (cr8_prev <= cr8) | |
2904 | return 1; | |
851ba692 | 2905 | vcpu->run->exit_reason = KVM_EXIT_SET_TPR; |
0a5fff19 GN |
2906 | return 0; |
2907 | } | |
6aa8b732 AK |
2908 | }; |
2909 | break; | |
25c4c276 | 2910 | case 2: /* clts */ |
5fd86fcf | 2911 | vmx_fpu_deactivate(vcpu); |
ad312c7c ZX |
2912 | vcpu->arch.cr0 &= ~X86_CR0_TS; |
2913 | vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0); | |
5fd86fcf | 2914 | vmx_fpu_activate(vcpu); |
25c4c276 AL |
2915 | skip_emulated_instruction(vcpu); |
2916 | return 1; | |
6aa8b732 AK |
2917 | case 1: /*mov from cr*/ |
2918 | switch (cr) { | |
2919 | case 3: | |
5fdbf976 | 2920 | kvm_register_write(vcpu, reg, vcpu->arch.cr3); |
229456fc | 2921 | trace_kvm_cr_read(cr, vcpu->arch.cr3); |
6aa8b732 AK |
2922 | skip_emulated_instruction(vcpu); |
2923 | return 1; | |
2924 | case 8: | |
229456fc MT |
2925 | val = kvm_get_cr8(vcpu); |
2926 | kvm_register_write(vcpu, reg, val); | |
2927 | trace_kvm_cr_read(cr, val); | |
6aa8b732 AK |
2928 | skip_emulated_instruction(vcpu); |
2929 | return 1; | |
2930 | } | |
2931 | break; | |
2932 | case 3: /* lmsw */ | |
2d3ad1f4 | 2933 | kvm_lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f); |
6aa8b732 AK |
2934 | |
2935 | skip_emulated_instruction(vcpu); | |
2936 | return 1; | |
2937 | default: | |
2938 | break; | |
2939 | } | |
851ba692 | 2940 | vcpu->run->exit_reason = 0; |
f0242478 | 2941 | pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
6aa8b732 AK |
2942 | (int)(exit_qualification >> 4) & 3, cr); |
2943 | return 0; | |
2944 | } | |
2945 | ||
851ba692 | 2946 | static int handle_dr(struct kvm_vcpu *vcpu) |
6aa8b732 | 2947 | { |
bfdaab09 | 2948 | unsigned long exit_qualification; |
6aa8b732 AK |
2949 | unsigned long val; |
2950 | int dr, reg; | |
2951 | ||
0a79b009 AK |
2952 | if (!kvm_require_cpl(vcpu, 0)) |
2953 | return 1; | |
42dbaa5a JK |
2954 | dr = vmcs_readl(GUEST_DR7); |
2955 | if (dr & DR7_GD) { | |
2956 | /* | |
2957 | * As the vm-exit takes precedence over the debug trap, we | |
2958 | * need to emulate the latter, either for the host or the | |
2959 | * guest debugging itself. | |
2960 | */ | |
2961 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
851ba692 AK |
2962 | vcpu->run->debug.arch.dr6 = vcpu->arch.dr6; |
2963 | vcpu->run->debug.arch.dr7 = dr; | |
2964 | vcpu->run->debug.arch.pc = | |
42dbaa5a JK |
2965 | vmcs_readl(GUEST_CS_BASE) + |
2966 | vmcs_readl(GUEST_RIP); | |
851ba692 AK |
2967 | vcpu->run->debug.arch.exception = DB_VECTOR; |
2968 | vcpu->run->exit_reason = KVM_EXIT_DEBUG; | |
42dbaa5a JK |
2969 | return 0; |
2970 | } else { | |
2971 | vcpu->arch.dr7 &= ~DR7_GD; | |
2972 | vcpu->arch.dr6 |= DR6_BD; | |
2973 | vmcs_writel(GUEST_DR7, vcpu->arch.dr7); | |
2974 | kvm_queue_exception(vcpu, DB_VECTOR); | |
2975 | return 1; | |
2976 | } | |
2977 | } | |
2978 | ||
bfdaab09 | 2979 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
42dbaa5a JK |
2980 | dr = exit_qualification & DEBUG_REG_ACCESS_NUM; |
2981 | reg = DEBUG_REG_ACCESS_REG(exit_qualification); | |
2982 | if (exit_qualification & TYPE_MOV_FROM_DR) { | |
6aa8b732 | 2983 | switch (dr) { |
42dbaa5a JK |
2984 | case 0 ... 3: |
2985 | val = vcpu->arch.db[dr]; | |
2986 | break; | |
6aa8b732 | 2987 | case 6: |
42dbaa5a | 2988 | val = vcpu->arch.dr6; |
6aa8b732 AK |
2989 | break; |
2990 | case 7: | |
42dbaa5a | 2991 | val = vcpu->arch.dr7; |
6aa8b732 AK |
2992 | break; |
2993 | default: | |
2994 | val = 0; | |
2995 | } | |
5fdbf976 | 2996 | kvm_register_write(vcpu, reg, val); |
6aa8b732 | 2997 | } else { |
42dbaa5a JK |
2998 | val = vcpu->arch.regs[reg]; |
2999 | switch (dr) { | |
3000 | case 0 ... 3: | |
3001 | vcpu->arch.db[dr] = val; | |
3002 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
3003 | vcpu->arch.eff_db[dr] = val; | |
3004 | break; | |
3005 | case 4 ... 5: | |
3006 | if (vcpu->arch.cr4 & X86_CR4_DE) | |
3007 | kvm_queue_exception(vcpu, UD_VECTOR); | |
3008 | break; | |
3009 | case 6: | |
3010 | if (val & 0xffffffff00000000ULL) { | |
3011 | kvm_queue_exception(vcpu, GP_VECTOR); | |
3012 | break; | |
3013 | } | |
3014 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1; | |
3015 | break; | |
3016 | case 7: | |
3017 | if (val & 0xffffffff00000000ULL) { | |
3018 | kvm_queue_exception(vcpu, GP_VECTOR); | |
3019 | break; | |
3020 | } | |
3021 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; | |
3022 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
3023 | vmcs_writel(GUEST_DR7, vcpu->arch.dr7); | |
3024 | vcpu->arch.switch_db_regs = | |
3025 | (val & DR7_BP_EN_MASK); | |
3026 | } | |
3027 | break; | |
3028 | } | |
6aa8b732 | 3029 | } |
6aa8b732 AK |
3030 | skip_emulated_instruction(vcpu); |
3031 | return 1; | |
3032 | } | |
3033 | ||
851ba692 | 3034 | static int handle_cpuid(struct kvm_vcpu *vcpu) |
6aa8b732 | 3035 | { |
06465c5a AK |
3036 | kvm_emulate_cpuid(vcpu); |
3037 | return 1; | |
6aa8b732 AK |
3038 | } |
3039 | ||
851ba692 | 3040 | static int handle_rdmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 3041 | { |
ad312c7c | 3042 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
6aa8b732 AK |
3043 | u64 data; |
3044 | ||
3045 | if (vmx_get_msr(vcpu, ecx, &data)) { | |
c1a5d4f9 | 3046 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
3047 | return 1; |
3048 | } | |
3049 | ||
229456fc | 3050 | trace_kvm_msr_read(ecx, data); |
2714d1d3 | 3051 | |
6aa8b732 | 3052 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
ad312c7c ZX |
3053 | vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u; |
3054 | vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u; | |
6aa8b732 AK |
3055 | skip_emulated_instruction(vcpu); |
3056 | return 1; | |
3057 | } | |
3058 | ||
851ba692 | 3059 | static int handle_wrmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 3060 | { |
ad312c7c ZX |
3061 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
3062 | u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u) | |
3063 | | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32); | |
6aa8b732 | 3064 | |
229456fc | 3065 | trace_kvm_msr_write(ecx, data); |
2714d1d3 | 3066 | |
6aa8b732 | 3067 | if (vmx_set_msr(vcpu, ecx, data) != 0) { |
c1a5d4f9 | 3068 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
3069 | return 1; |
3070 | } | |
3071 | ||
3072 | skip_emulated_instruction(vcpu); | |
3073 | return 1; | |
3074 | } | |
3075 | ||
851ba692 | 3076 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu) |
6e5d865c YS |
3077 | { |
3078 | return 1; | |
3079 | } | |
3080 | ||
851ba692 | 3081 | static int handle_interrupt_window(struct kvm_vcpu *vcpu) |
6aa8b732 | 3082 | { |
85f455f7 ED |
3083 | u32 cpu_based_vm_exec_control; |
3084 | ||
3085 | /* clear pending irq */ | |
3086 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
3087 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
3088 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2714d1d3 | 3089 | |
a26bf12a | 3090 | ++vcpu->stat.irq_window_exits; |
2714d1d3 | 3091 | |
c1150d8c DL |
3092 | /* |
3093 | * If the user space waits to inject interrupts, exit as soon as | |
3094 | * possible | |
3095 | */ | |
8061823a | 3096 | if (!irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 3097 | vcpu->run->request_interrupt_window && |
8061823a | 3098 | !kvm_cpu_has_interrupt(vcpu)) { |
851ba692 | 3099 | vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
c1150d8c DL |
3100 | return 0; |
3101 | } | |
6aa8b732 AK |
3102 | return 1; |
3103 | } | |
3104 | ||
851ba692 | 3105 | static int handle_halt(struct kvm_vcpu *vcpu) |
6aa8b732 AK |
3106 | { |
3107 | skip_emulated_instruction(vcpu); | |
d3bef15f | 3108 | return kvm_emulate_halt(vcpu); |
6aa8b732 AK |
3109 | } |
3110 | ||
851ba692 | 3111 | static int handle_vmcall(struct kvm_vcpu *vcpu) |
c21415e8 | 3112 | { |
510043da | 3113 | skip_emulated_instruction(vcpu); |
7aa81cc0 AL |
3114 | kvm_emulate_hypercall(vcpu); |
3115 | return 1; | |
c21415e8 IM |
3116 | } |
3117 | ||
851ba692 | 3118 | static int handle_vmx_insn(struct kvm_vcpu *vcpu) |
e3c7cb6a AK |
3119 | { |
3120 | kvm_queue_exception(vcpu, UD_VECTOR); | |
3121 | return 1; | |
3122 | } | |
3123 | ||
851ba692 | 3124 | static int handle_invlpg(struct kvm_vcpu *vcpu) |
a7052897 | 3125 | { |
f9c617f6 | 3126 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
a7052897 MT |
3127 | |
3128 | kvm_mmu_invlpg(vcpu, exit_qualification); | |
3129 | skip_emulated_instruction(vcpu); | |
3130 | return 1; | |
3131 | } | |
3132 | ||
851ba692 | 3133 | static int handle_wbinvd(struct kvm_vcpu *vcpu) |
e5edaa01 ED |
3134 | { |
3135 | skip_emulated_instruction(vcpu); | |
3136 | /* TODO: Add support for VT-d/pass-through device */ | |
3137 | return 1; | |
3138 | } | |
3139 | ||
851ba692 | 3140 | static int handle_apic_access(struct kvm_vcpu *vcpu) |
f78e0e2e | 3141 | { |
f9c617f6 | 3142 | unsigned long exit_qualification; |
f78e0e2e SY |
3143 | enum emulation_result er; |
3144 | unsigned long offset; | |
3145 | ||
f9c617f6 | 3146 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
f78e0e2e SY |
3147 | offset = exit_qualification & 0xffful; |
3148 | ||
851ba692 | 3149 | er = emulate_instruction(vcpu, 0, 0, 0); |
f78e0e2e SY |
3150 | |
3151 | if (er != EMULATE_DONE) { | |
3152 | printk(KERN_ERR | |
3153 | "Fail to handle apic access vmexit! Offset is 0x%lx\n", | |
3154 | offset); | |
7f582ab6 | 3155 | return -ENOEXEC; |
f78e0e2e SY |
3156 | } |
3157 | return 1; | |
3158 | } | |
3159 | ||
851ba692 | 3160 | static int handle_task_switch(struct kvm_vcpu *vcpu) |
37817f29 | 3161 | { |
60637aac | 3162 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
37817f29 IE |
3163 | unsigned long exit_qualification; |
3164 | u16 tss_selector; | |
64a7ec06 GN |
3165 | int reason, type, idt_v; |
3166 | ||
3167 | idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK); | |
3168 | type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK); | |
37817f29 IE |
3169 | |
3170 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
3171 | ||
3172 | reason = (u32)exit_qualification >> 30; | |
64a7ec06 GN |
3173 | if (reason == TASK_SWITCH_GATE && idt_v) { |
3174 | switch (type) { | |
3175 | case INTR_TYPE_NMI_INTR: | |
3176 | vcpu->arch.nmi_injected = false; | |
3177 | if (cpu_has_virtual_nmis()) | |
3178 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
3179 | GUEST_INTR_STATE_NMI); | |
3180 | break; | |
3181 | case INTR_TYPE_EXT_INTR: | |
66fd3f7f | 3182 | case INTR_TYPE_SOFT_INTR: |
64a7ec06 GN |
3183 | kvm_clear_interrupt_queue(vcpu); |
3184 | break; | |
3185 | case INTR_TYPE_HARD_EXCEPTION: | |
3186 | case INTR_TYPE_SOFT_EXCEPTION: | |
3187 | kvm_clear_exception_queue(vcpu); | |
3188 | break; | |
3189 | default: | |
3190 | break; | |
3191 | } | |
60637aac | 3192 | } |
37817f29 IE |
3193 | tss_selector = exit_qualification; |
3194 | ||
64a7ec06 GN |
3195 | if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION && |
3196 | type != INTR_TYPE_EXT_INTR && | |
3197 | type != INTR_TYPE_NMI_INTR)) | |
3198 | skip_emulated_instruction(vcpu); | |
3199 | ||
42dbaa5a JK |
3200 | if (!kvm_task_switch(vcpu, tss_selector, reason)) |
3201 | return 0; | |
3202 | ||
3203 | /* clear all local breakpoint enable flags */ | |
3204 | vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55); | |
3205 | ||
3206 | /* | |
3207 | * TODO: What about debug traps on tss switch? | |
3208 | * Are we supposed to inject them and update dr6? | |
3209 | */ | |
3210 | ||
3211 | return 1; | |
37817f29 IE |
3212 | } |
3213 | ||
851ba692 | 3214 | static int handle_ept_violation(struct kvm_vcpu *vcpu) |
1439442c | 3215 | { |
f9c617f6 | 3216 | unsigned long exit_qualification; |
1439442c | 3217 | gpa_t gpa; |
1439442c | 3218 | int gla_validity; |
1439442c | 3219 | |
f9c617f6 | 3220 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
1439442c SY |
3221 | |
3222 | if (exit_qualification & (1 << 6)) { | |
3223 | printk(KERN_ERR "EPT: GPA exceeds GAW!\n"); | |
7f582ab6 | 3224 | return -EINVAL; |
1439442c SY |
3225 | } |
3226 | ||
3227 | gla_validity = (exit_qualification >> 7) & 0x3; | |
3228 | if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) { | |
3229 | printk(KERN_ERR "EPT: Handling EPT violation failed!\n"); | |
3230 | printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n", | |
3231 | (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS), | |
f9c617f6 | 3232 | vmcs_readl(GUEST_LINEAR_ADDRESS)); |
1439442c SY |
3233 | printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n", |
3234 | (long unsigned int)exit_qualification); | |
851ba692 AK |
3235 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
3236 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION; | |
596ae895 | 3237 | return 0; |
1439442c SY |
3238 | } |
3239 | ||
3240 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
229456fc | 3241 | trace_kvm_page_fault(gpa, exit_qualification); |
49cd7d22 | 3242 | return kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, 0); |
1439442c SY |
3243 | } |
3244 | ||
68f89400 MT |
3245 | static u64 ept_rsvd_mask(u64 spte, int level) |
3246 | { | |
3247 | int i; | |
3248 | u64 mask = 0; | |
3249 | ||
3250 | for (i = 51; i > boot_cpu_data.x86_phys_bits; i--) | |
3251 | mask |= (1ULL << i); | |
3252 | ||
3253 | if (level > 2) | |
3254 | /* bits 7:3 reserved */ | |
3255 | mask |= 0xf8; | |
3256 | else if (level == 2) { | |
3257 | if (spte & (1ULL << 7)) | |
3258 | /* 2MB ref, bits 20:12 reserved */ | |
3259 | mask |= 0x1ff000; | |
3260 | else | |
3261 | /* bits 6:3 reserved */ | |
3262 | mask |= 0x78; | |
3263 | } | |
3264 | ||
3265 | return mask; | |
3266 | } | |
3267 | ||
3268 | static void ept_misconfig_inspect_spte(struct kvm_vcpu *vcpu, u64 spte, | |
3269 | int level) | |
3270 | { | |
3271 | printk(KERN_ERR "%s: spte 0x%llx level %d\n", __func__, spte, level); | |
3272 | ||
3273 | /* 010b (write-only) */ | |
3274 | WARN_ON((spte & 0x7) == 0x2); | |
3275 | ||
3276 | /* 110b (write/execute) */ | |
3277 | WARN_ON((spte & 0x7) == 0x6); | |
3278 | ||
3279 | /* 100b (execute-only) and value not supported by logical processor */ | |
3280 | if (!cpu_has_vmx_ept_execute_only()) | |
3281 | WARN_ON((spte & 0x7) == 0x4); | |
3282 | ||
3283 | /* not 000b */ | |
3284 | if ((spte & 0x7)) { | |
3285 | u64 rsvd_bits = spte & ept_rsvd_mask(spte, level); | |
3286 | ||
3287 | if (rsvd_bits != 0) { | |
3288 | printk(KERN_ERR "%s: rsvd_bits = 0x%llx\n", | |
3289 | __func__, rsvd_bits); | |
3290 | WARN_ON(1); | |
3291 | } | |
3292 | ||
3293 | if (level == 1 || (level == 2 && (spte & (1ULL << 7)))) { | |
3294 | u64 ept_mem_type = (spte & 0x38) >> 3; | |
3295 | ||
3296 | if (ept_mem_type == 2 || ept_mem_type == 3 || | |
3297 | ept_mem_type == 7) { | |
3298 | printk(KERN_ERR "%s: ept_mem_type=0x%llx\n", | |
3299 | __func__, ept_mem_type); | |
3300 | WARN_ON(1); | |
3301 | } | |
3302 | } | |
3303 | } | |
3304 | } | |
3305 | ||
851ba692 | 3306 | static int handle_ept_misconfig(struct kvm_vcpu *vcpu) |
68f89400 MT |
3307 | { |
3308 | u64 sptes[4]; | |
3309 | int nr_sptes, i; | |
3310 | gpa_t gpa; | |
3311 | ||
3312 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
3313 | ||
3314 | printk(KERN_ERR "EPT: Misconfiguration.\n"); | |
3315 | printk(KERN_ERR "EPT: GPA: 0x%llx\n", gpa); | |
3316 | ||
3317 | nr_sptes = kvm_mmu_get_spte_hierarchy(vcpu, gpa, sptes); | |
3318 | ||
3319 | for (i = PT64_ROOT_LEVEL; i > PT64_ROOT_LEVEL - nr_sptes; --i) | |
3320 | ept_misconfig_inspect_spte(vcpu, sptes[i-1], i); | |
3321 | ||
851ba692 AK |
3322 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
3323 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG; | |
68f89400 MT |
3324 | |
3325 | return 0; | |
3326 | } | |
3327 | ||
851ba692 | 3328 | static int handle_nmi_window(struct kvm_vcpu *vcpu) |
f08864b4 SY |
3329 | { |
3330 | u32 cpu_based_vm_exec_control; | |
3331 | ||
3332 | /* clear pending NMI */ | |
3333 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
3334 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; | |
3335 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
3336 | ++vcpu->stat.nmi_window_exits; | |
3337 | ||
3338 | return 1; | |
3339 | } | |
3340 | ||
80ced186 | 3341 | static int handle_invalid_guest_state(struct kvm_vcpu *vcpu) |
ea953ef0 | 3342 | { |
8b3079a5 AK |
3343 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3344 | enum emulation_result err = EMULATE_DONE; | |
80ced186 | 3345 | int ret = 1; |
ea953ef0 MG |
3346 | |
3347 | while (!guest_state_valid(vcpu)) { | |
851ba692 | 3348 | err = emulate_instruction(vcpu, 0, 0, 0); |
ea953ef0 | 3349 | |
80ced186 MG |
3350 | if (err == EMULATE_DO_MMIO) { |
3351 | ret = 0; | |
3352 | goto out; | |
3353 | } | |
1d5a4d9b GT |
3354 | |
3355 | if (err != EMULATE_DONE) { | |
3356 | kvm_report_emulation_failure(vcpu, "emulation failure"); | |
80ced186 MG |
3357 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
3358 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
3359 | ret = 0; | |
3360 | goto out; | |
ea953ef0 MG |
3361 | } |
3362 | ||
3363 | if (signal_pending(current)) | |
80ced186 | 3364 | goto out; |
ea953ef0 MG |
3365 | if (need_resched()) |
3366 | schedule(); | |
3367 | } | |
3368 | ||
80ced186 MG |
3369 | vmx->emulation_required = 0; |
3370 | out: | |
3371 | return ret; | |
ea953ef0 MG |
3372 | } |
3373 | ||
4b8d54f9 ZE |
3374 | /* |
3375 | * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE | |
3376 | * exiting, so only get here on cpu with PAUSE-Loop-Exiting. | |
3377 | */ | |
9fb41ba8 | 3378 | static int handle_pause(struct kvm_vcpu *vcpu) |
4b8d54f9 ZE |
3379 | { |
3380 | skip_emulated_instruction(vcpu); | |
3381 | kvm_vcpu_on_spin(vcpu); | |
3382 | ||
3383 | return 1; | |
3384 | } | |
3385 | ||
6aa8b732 AK |
3386 | /* |
3387 | * The exit handlers return 1 if the exit was handled fully and guest execution | |
3388 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs | |
3389 | * to be done to userspace and return 0. | |
3390 | */ | |
851ba692 | 3391 | static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { |
6aa8b732 AK |
3392 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, |
3393 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, | |
988ad74f | 3394 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
f08864b4 | 3395 | [EXIT_REASON_NMI_WINDOW] = handle_nmi_window, |
6aa8b732 | 3396 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
6aa8b732 AK |
3397 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
3398 | [EXIT_REASON_DR_ACCESS] = handle_dr, | |
3399 | [EXIT_REASON_CPUID] = handle_cpuid, | |
3400 | [EXIT_REASON_MSR_READ] = handle_rdmsr, | |
3401 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, | |
3402 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, | |
3403 | [EXIT_REASON_HLT] = handle_halt, | |
a7052897 | 3404 | [EXIT_REASON_INVLPG] = handle_invlpg, |
c21415e8 | 3405 | [EXIT_REASON_VMCALL] = handle_vmcall, |
e3c7cb6a AK |
3406 | [EXIT_REASON_VMCLEAR] = handle_vmx_insn, |
3407 | [EXIT_REASON_VMLAUNCH] = handle_vmx_insn, | |
3408 | [EXIT_REASON_VMPTRLD] = handle_vmx_insn, | |
3409 | [EXIT_REASON_VMPTRST] = handle_vmx_insn, | |
3410 | [EXIT_REASON_VMREAD] = handle_vmx_insn, | |
3411 | [EXIT_REASON_VMRESUME] = handle_vmx_insn, | |
3412 | [EXIT_REASON_VMWRITE] = handle_vmx_insn, | |
3413 | [EXIT_REASON_VMOFF] = handle_vmx_insn, | |
3414 | [EXIT_REASON_VMON] = handle_vmx_insn, | |
f78e0e2e SY |
3415 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
3416 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, | |
e5edaa01 | 3417 | [EXIT_REASON_WBINVD] = handle_wbinvd, |
37817f29 | 3418 | [EXIT_REASON_TASK_SWITCH] = handle_task_switch, |
a0861c02 | 3419 | [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check, |
68f89400 MT |
3420 | [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation, |
3421 | [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig, | |
4b8d54f9 | 3422 | [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause, |
6aa8b732 AK |
3423 | }; |
3424 | ||
3425 | static const int kvm_vmx_max_exit_handlers = | |
50a3485c | 3426 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
6aa8b732 AK |
3427 | |
3428 | /* | |
3429 | * The guest has exited. See if we can fix it or if we need userspace | |
3430 | * assistance. | |
3431 | */ | |
851ba692 | 3432 | static int vmx_handle_exit(struct kvm_vcpu *vcpu) |
6aa8b732 | 3433 | { |
29bd8a78 | 3434 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
a0861c02 | 3435 | u32 exit_reason = vmx->exit_reason; |
1155f76a | 3436 | u32 vectoring_info = vmx->idt_vectoring_info; |
29bd8a78 | 3437 | |
229456fc | 3438 | trace_kvm_exit(exit_reason, kvm_rip_read(vcpu)); |
2714d1d3 | 3439 | |
80ced186 MG |
3440 | /* If guest state is invalid, start emulating */ |
3441 | if (vmx->emulation_required && emulate_invalid_guest_state) | |
3442 | return handle_invalid_guest_state(vcpu); | |
1d5a4d9b | 3443 | |
1439442c SY |
3444 | /* Access CR3 don't cause VMExit in paging mode, so we need |
3445 | * to sync with guest real CR3. */ | |
6de4f3ad | 3446 | if (enable_ept && is_paging(vcpu)) |
1439442c | 3447 | vcpu->arch.cr3 = vmcs_readl(GUEST_CR3); |
1439442c | 3448 | |
29bd8a78 | 3449 | if (unlikely(vmx->fail)) { |
851ba692 AK |
3450 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
3451 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
29bd8a78 AK |
3452 | = vmcs_read32(VM_INSTRUCTION_ERROR); |
3453 | return 0; | |
3454 | } | |
6aa8b732 | 3455 | |
d77c26fc | 3456 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
1439442c | 3457 | (exit_reason != EXIT_REASON_EXCEPTION_NMI && |
60637aac JK |
3458 | exit_reason != EXIT_REASON_EPT_VIOLATION && |
3459 | exit_reason != EXIT_REASON_TASK_SWITCH)) | |
3460 | printk(KERN_WARNING "%s: unexpected, valid vectoring info " | |
3461 | "(0x%x) and exit reason is 0x%x\n", | |
3462 | __func__, vectoring_info, exit_reason); | |
3b86cd99 JK |
3463 | |
3464 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) { | |
c4282df9 | 3465 | if (vmx_interrupt_allowed(vcpu)) { |
3b86cd99 | 3466 | vmx->soft_vnmi_blocked = 0; |
3b86cd99 | 3467 | } else if (vmx->vnmi_blocked_time > 1000000000LL && |
4531220b | 3468 | vcpu->arch.nmi_pending) { |
3b86cd99 JK |
3469 | /* |
3470 | * This CPU don't support us in finding the end of an | |
3471 | * NMI-blocked window if the guest runs with IRQs | |
3472 | * disabled. So we pull the trigger after 1 s of | |
3473 | * futile waiting, but inform the user about this. | |
3474 | */ | |
3475 | printk(KERN_WARNING "%s: Breaking out of NMI-blocked " | |
3476 | "state on VCPU %d after 1 s timeout\n", | |
3477 | __func__, vcpu->vcpu_id); | |
3478 | vmx->soft_vnmi_blocked = 0; | |
3b86cd99 | 3479 | } |
3b86cd99 JK |
3480 | } |
3481 | ||
6aa8b732 AK |
3482 | if (exit_reason < kvm_vmx_max_exit_handlers |
3483 | && kvm_vmx_exit_handlers[exit_reason]) | |
851ba692 | 3484 | return kvm_vmx_exit_handlers[exit_reason](vcpu); |
6aa8b732 | 3485 | else { |
851ba692 AK |
3486 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
3487 | vcpu->run->hw.hardware_exit_reason = exit_reason; | |
6aa8b732 AK |
3488 | } |
3489 | return 0; | |
3490 | } | |
3491 | ||
95ba8273 | 3492 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) |
6e5d865c | 3493 | { |
95ba8273 | 3494 | if (irr == -1 || tpr < irr) { |
6e5d865c YS |
3495 | vmcs_write32(TPR_THRESHOLD, 0); |
3496 | return; | |
3497 | } | |
3498 | ||
95ba8273 | 3499 | vmcs_write32(TPR_THRESHOLD, irr); |
6e5d865c YS |
3500 | } |
3501 | ||
cf393f75 AK |
3502 | static void vmx_complete_interrupts(struct vcpu_vmx *vmx) |
3503 | { | |
3504 | u32 exit_intr_info; | |
7b4a25cb | 3505 | u32 idt_vectoring_info = vmx->idt_vectoring_info; |
cf393f75 AK |
3506 | bool unblock_nmi; |
3507 | u8 vector; | |
668f612f AK |
3508 | int type; |
3509 | bool idtv_info_valid; | |
cf393f75 AK |
3510 | |
3511 | exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
20f65983 | 3512 | |
a0861c02 AK |
3513 | vmx->exit_reason = vmcs_read32(VM_EXIT_REASON); |
3514 | ||
3515 | /* Handle machine checks before interrupts are enabled */ | |
3516 | if ((vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY) | |
3517 | || (vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI | |
3518 | && is_machine_check(exit_intr_info))) | |
3519 | kvm_machine_check(); | |
3520 | ||
20f65983 GN |
3521 | /* We need to handle NMIs before interrupts are enabled */ |
3522 | if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR && | |
229456fc | 3523 | (exit_intr_info & INTR_INFO_VALID_MASK)) |
20f65983 | 3524 | asm("int $2"); |
20f65983 GN |
3525 | |
3526 | idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
3527 | ||
cf393f75 AK |
3528 | if (cpu_has_virtual_nmis()) { |
3529 | unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0; | |
3530 | vector = exit_intr_info & INTR_INFO_VECTOR_MASK; | |
3531 | /* | |
7b4a25cb | 3532 | * SDM 3: 27.7.1.2 (September 2008) |
cf393f75 AK |
3533 | * Re-set bit "block by NMI" before VM entry if vmexit caused by |
3534 | * a guest IRET fault. | |
7b4a25cb GN |
3535 | * SDM 3: 23.2.2 (September 2008) |
3536 | * Bit 12 is undefined in any of the following cases: | |
3537 | * If the VM exit sets the valid bit in the IDT-vectoring | |
3538 | * information field. | |
3539 | * If the VM exit is due to a double fault. | |
cf393f75 | 3540 | */ |
7b4a25cb GN |
3541 | if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi && |
3542 | vector != DF_VECTOR && !idtv_info_valid) | |
cf393f75 AK |
3543 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, |
3544 | GUEST_INTR_STATE_NMI); | |
3b86cd99 JK |
3545 | } else if (unlikely(vmx->soft_vnmi_blocked)) |
3546 | vmx->vnmi_blocked_time += | |
3547 | ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time)); | |
668f612f | 3548 | |
37b96e98 GN |
3549 | vmx->vcpu.arch.nmi_injected = false; |
3550 | kvm_clear_exception_queue(&vmx->vcpu); | |
3551 | kvm_clear_interrupt_queue(&vmx->vcpu); | |
3552 | ||
3553 | if (!idtv_info_valid) | |
3554 | return; | |
3555 | ||
668f612f AK |
3556 | vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK; |
3557 | type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK; | |
37b96e98 | 3558 | |
64a7ec06 | 3559 | switch (type) { |
37b96e98 GN |
3560 | case INTR_TYPE_NMI_INTR: |
3561 | vmx->vcpu.arch.nmi_injected = true; | |
668f612f | 3562 | /* |
7b4a25cb | 3563 | * SDM 3: 27.7.1.2 (September 2008) |
37b96e98 GN |
3564 | * Clear bit "block by NMI" before VM entry if a NMI |
3565 | * delivery faulted. | |
668f612f | 3566 | */ |
37b96e98 GN |
3567 | vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO, |
3568 | GUEST_INTR_STATE_NMI); | |
3569 | break; | |
37b96e98 | 3570 | case INTR_TYPE_SOFT_EXCEPTION: |
66fd3f7f GN |
3571 | vmx->vcpu.arch.event_exit_inst_len = |
3572 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
3573 | /* fall through */ | |
3574 | case INTR_TYPE_HARD_EXCEPTION: | |
35920a35 | 3575 | if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) { |
37b96e98 GN |
3576 | u32 err = vmcs_read32(IDT_VECTORING_ERROR_CODE); |
3577 | kvm_queue_exception_e(&vmx->vcpu, vector, err); | |
35920a35 AK |
3578 | } else |
3579 | kvm_queue_exception(&vmx->vcpu, vector); | |
37b96e98 | 3580 | break; |
66fd3f7f GN |
3581 | case INTR_TYPE_SOFT_INTR: |
3582 | vmx->vcpu.arch.event_exit_inst_len = | |
3583 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
3584 | /* fall through */ | |
37b96e98 | 3585 | case INTR_TYPE_EXT_INTR: |
66fd3f7f GN |
3586 | kvm_queue_interrupt(&vmx->vcpu, vector, |
3587 | type == INTR_TYPE_SOFT_INTR); | |
37b96e98 GN |
3588 | break; |
3589 | default: | |
3590 | break; | |
f7d9238f | 3591 | } |
cf393f75 AK |
3592 | } |
3593 | ||
9c8cba37 AK |
3594 | /* |
3595 | * Failure to inject an interrupt should give us the information | |
3596 | * in IDT_VECTORING_INFO_FIELD. However, if the failure occurs | |
3597 | * when fetching the interrupt redirection bitmap in the real-mode | |
3598 | * tss, this doesn't happen. So we do it ourselves. | |
3599 | */ | |
3600 | static void fixup_rmode_irq(struct vcpu_vmx *vmx) | |
3601 | { | |
3602 | vmx->rmode.irq.pending = 0; | |
5fdbf976 | 3603 | if (kvm_rip_read(&vmx->vcpu) + 1 != vmx->rmode.irq.rip) |
9c8cba37 | 3604 | return; |
5fdbf976 | 3605 | kvm_rip_write(&vmx->vcpu, vmx->rmode.irq.rip); |
9c8cba37 AK |
3606 | if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) { |
3607 | vmx->idt_vectoring_info &= ~VECTORING_INFO_TYPE_MASK; | |
3608 | vmx->idt_vectoring_info |= INTR_TYPE_EXT_INTR; | |
3609 | return; | |
3610 | } | |
3611 | vmx->idt_vectoring_info = | |
3612 | VECTORING_INFO_VALID_MASK | |
3613 | | INTR_TYPE_EXT_INTR | |
3614 | | vmx->rmode.irq.vector; | |
3615 | } | |
3616 | ||
c801949d AK |
3617 | #ifdef CONFIG_X86_64 |
3618 | #define R "r" | |
3619 | #define Q "q" | |
3620 | #else | |
3621 | #define R "e" | |
3622 | #define Q "l" | |
3623 | #endif | |
3624 | ||
851ba692 | 3625 | static void vmx_vcpu_run(struct kvm_vcpu *vcpu) |
6aa8b732 | 3626 | { |
a2fa3e9f | 3627 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
e6adf283 | 3628 | |
3b86cd99 JK |
3629 | /* Record the guest's net vcpu time for enforced NMI injections. */ |
3630 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) | |
3631 | vmx->entry_time = ktime_get(); | |
3632 | ||
80ced186 MG |
3633 | /* Don't enter VMX if guest state is invalid, let the exit handler |
3634 | start emulation until we arrive back to a valid state */ | |
3635 | if (vmx->emulation_required && emulate_invalid_guest_state) | |
a89a8fb9 | 3636 | return; |
a89a8fb9 | 3637 | |
5fdbf976 MT |
3638 | if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty)) |
3639 | vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]); | |
3640 | if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty)) | |
3641 | vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]); | |
3642 | ||
787ff736 GN |
3643 | /* When single-stepping over STI and MOV SS, we must clear the |
3644 | * corresponding interruptibility bits in the guest state. Otherwise | |
3645 | * vmentry fails as it then expects bit 14 (BS) in pending debug | |
3646 | * exceptions being set, but that's not correct for the guest debugging | |
3647 | * case. */ | |
3648 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
3649 | vmx_set_interrupt_shadow(vcpu, 0); | |
3650 | ||
e6adf283 AK |
3651 | /* |
3652 | * Loading guest fpu may have cleared host cr0.ts | |
3653 | */ | |
3654 | vmcs_writel(HOST_CR0, read_cr0()); | |
3655 | ||
e8a48342 AK |
3656 | if (vcpu->arch.switch_db_regs) |
3657 | set_debugreg(vcpu->arch.dr6, 6); | |
42dbaa5a | 3658 | |
d77c26fc | 3659 | asm( |
6aa8b732 | 3660 | /* Store host registers */ |
c801949d AK |
3661 | "push %%"R"dx; push %%"R"bp;" |
3662 | "push %%"R"cx \n\t" | |
313dbd49 AK |
3663 | "cmp %%"R"sp, %c[host_rsp](%0) \n\t" |
3664 | "je 1f \n\t" | |
3665 | "mov %%"R"sp, %c[host_rsp](%0) \n\t" | |
4ecac3fd | 3666 | __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t" |
313dbd49 | 3667 | "1: \n\t" |
d3edefc0 AK |
3668 | /* Reload cr2 if changed */ |
3669 | "mov %c[cr2](%0), %%"R"ax \n\t" | |
3670 | "mov %%cr2, %%"R"dx \n\t" | |
3671 | "cmp %%"R"ax, %%"R"dx \n\t" | |
3672 | "je 2f \n\t" | |
3673 | "mov %%"R"ax, %%cr2 \n\t" | |
3674 | "2: \n\t" | |
6aa8b732 | 3675 | /* Check if vmlaunch of vmresume is needed */ |
e08aa78a | 3676 | "cmpl $0, %c[launched](%0) \n\t" |
6aa8b732 | 3677 | /* Load guest registers. Don't clobber flags. */ |
c801949d AK |
3678 | "mov %c[rax](%0), %%"R"ax \n\t" |
3679 | "mov %c[rbx](%0), %%"R"bx \n\t" | |
3680 | "mov %c[rdx](%0), %%"R"dx \n\t" | |
3681 | "mov %c[rsi](%0), %%"R"si \n\t" | |
3682 | "mov %c[rdi](%0), %%"R"di \n\t" | |
3683 | "mov %c[rbp](%0), %%"R"bp \n\t" | |
05b3e0c2 | 3684 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
3685 | "mov %c[r8](%0), %%r8 \n\t" |
3686 | "mov %c[r9](%0), %%r9 \n\t" | |
3687 | "mov %c[r10](%0), %%r10 \n\t" | |
3688 | "mov %c[r11](%0), %%r11 \n\t" | |
3689 | "mov %c[r12](%0), %%r12 \n\t" | |
3690 | "mov %c[r13](%0), %%r13 \n\t" | |
3691 | "mov %c[r14](%0), %%r14 \n\t" | |
3692 | "mov %c[r15](%0), %%r15 \n\t" | |
6aa8b732 | 3693 | #endif |
c801949d AK |
3694 | "mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */ |
3695 | ||
6aa8b732 | 3696 | /* Enter guest mode */ |
cd2276a7 | 3697 | "jne .Llaunched \n\t" |
4ecac3fd | 3698 | __ex(ASM_VMX_VMLAUNCH) "\n\t" |
cd2276a7 | 3699 | "jmp .Lkvm_vmx_return \n\t" |
4ecac3fd | 3700 | ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t" |
cd2276a7 | 3701 | ".Lkvm_vmx_return: " |
6aa8b732 | 3702 | /* Save guest registers, load host registers, keep flags */ |
c801949d AK |
3703 | "xchg %0, (%%"R"sp) \n\t" |
3704 | "mov %%"R"ax, %c[rax](%0) \n\t" | |
3705 | "mov %%"R"bx, %c[rbx](%0) \n\t" | |
3706 | "push"Q" (%%"R"sp); pop"Q" %c[rcx](%0) \n\t" | |
3707 | "mov %%"R"dx, %c[rdx](%0) \n\t" | |
3708 | "mov %%"R"si, %c[rsi](%0) \n\t" | |
3709 | "mov %%"R"di, %c[rdi](%0) \n\t" | |
3710 | "mov %%"R"bp, %c[rbp](%0) \n\t" | |
05b3e0c2 | 3711 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
3712 | "mov %%r8, %c[r8](%0) \n\t" |
3713 | "mov %%r9, %c[r9](%0) \n\t" | |
3714 | "mov %%r10, %c[r10](%0) \n\t" | |
3715 | "mov %%r11, %c[r11](%0) \n\t" | |
3716 | "mov %%r12, %c[r12](%0) \n\t" | |
3717 | "mov %%r13, %c[r13](%0) \n\t" | |
3718 | "mov %%r14, %c[r14](%0) \n\t" | |
3719 | "mov %%r15, %c[r15](%0) \n\t" | |
6aa8b732 | 3720 | #endif |
c801949d AK |
3721 | "mov %%cr2, %%"R"ax \n\t" |
3722 | "mov %%"R"ax, %c[cr2](%0) \n\t" | |
3723 | ||
3724 | "pop %%"R"bp; pop %%"R"bp; pop %%"R"dx \n\t" | |
e08aa78a AK |
3725 | "setbe %c[fail](%0) \n\t" |
3726 | : : "c"(vmx), "d"((unsigned long)HOST_RSP), | |
3727 | [launched]"i"(offsetof(struct vcpu_vmx, launched)), | |
3728 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), | |
313dbd49 | 3729 | [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)), |
ad312c7c ZX |
3730 | [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])), |
3731 | [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])), | |
3732 | [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])), | |
3733 | [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])), | |
3734 | [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])), | |
3735 | [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])), | |
3736 | [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])), | |
05b3e0c2 | 3737 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
3738 | [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])), |
3739 | [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])), | |
3740 | [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])), | |
3741 | [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])), | |
3742 | [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])), | |
3743 | [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])), | |
3744 | [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), | |
3745 | [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), | |
6aa8b732 | 3746 | #endif |
ad312c7c | 3747 | [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)) |
c2036300 | 3748 | : "cc", "memory" |
c801949d | 3749 | , R"bx", R"di", R"si" |
c2036300 | 3750 | #ifdef CONFIG_X86_64 |
c2036300 LV |
3751 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
3752 | #endif | |
3753 | ); | |
6aa8b732 | 3754 | |
6de4f3ad AK |
3755 | vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP) |
3756 | | (1 << VCPU_EXREG_PDPTR)); | |
5fdbf976 MT |
3757 | vcpu->arch.regs_dirty = 0; |
3758 | ||
e8a48342 AK |
3759 | if (vcpu->arch.switch_db_regs) |
3760 | get_debugreg(vcpu->arch.dr6, 6); | |
42dbaa5a | 3761 | |
1155f76a | 3762 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
9c8cba37 AK |
3763 | if (vmx->rmode.irq.pending) |
3764 | fixup_rmode_irq(vmx); | |
1155f76a | 3765 | |
d77c26fc | 3766 | asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); |
15ad7146 | 3767 | vmx->launched = 1; |
1b6269db | 3768 | |
cf393f75 | 3769 | vmx_complete_interrupts(vmx); |
6aa8b732 AK |
3770 | } |
3771 | ||
c801949d AK |
3772 | #undef R |
3773 | #undef Q | |
3774 | ||
6aa8b732 AK |
3775 | static void vmx_free_vmcs(struct kvm_vcpu *vcpu) |
3776 | { | |
a2fa3e9f GH |
3777 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3778 | ||
3779 | if (vmx->vmcs) { | |
543e4243 | 3780 | vcpu_clear(vmx); |
a2fa3e9f GH |
3781 | free_vmcs(vmx->vmcs); |
3782 | vmx->vmcs = NULL; | |
6aa8b732 AK |
3783 | } |
3784 | } | |
3785 | ||
3786 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) | |
3787 | { | |
fb3f0f51 RR |
3788 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3789 | ||
2384d2b3 SY |
3790 | spin_lock(&vmx_vpid_lock); |
3791 | if (vmx->vpid != 0) | |
3792 | __clear_bit(vmx->vpid, vmx_vpid_bitmap); | |
3793 | spin_unlock(&vmx_vpid_lock); | |
6aa8b732 | 3794 | vmx_free_vmcs(vcpu); |
fb3f0f51 RR |
3795 | kfree(vmx->guest_msrs); |
3796 | kvm_vcpu_uninit(vcpu); | |
a4770347 | 3797 | kmem_cache_free(kvm_vcpu_cache, vmx); |
6aa8b732 AK |
3798 | } |
3799 | ||
fb3f0f51 | 3800 | static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 3801 | { |
fb3f0f51 | 3802 | int err; |
c16f862d | 3803 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
15ad7146 | 3804 | int cpu; |
6aa8b732 | 3805 | |
a2fa3e9f | 3806 | if (!vmx) |
fb3f0f51 RR |
3807 | return ERR_PTR(-ENOMEM); |
3808 | ||
2384d2b3 SY |
3809 | allocate_vpid(vmx); |
3810 | ||
fb3f0f51 RR |
3811 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
3812 | if (err) | |
3813 | goto free_vcpu; | |
965b58a5 | 3814 | |
a2fa3e9f | 3815 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
fb3f0f51 RR |
3816 | if (!vmx->guest_msrs) { |
3817 | err = -ENOMEM; | |
3818 | goto uninit_vcpu; | |
3819 | } | |
965b58a5 | 3820 | |
a2fa3e9f GH |
3821 | vmx->vmcs = alloc_vmcs(); |
3822 | if (!vmx->vmcs) | |
fb3f0f51 | 3823 | goto free_msrs; |
a2fa3e9f GH |
3824 | |
3825 | vmcs_clear(vmx->vmcs); | |
3826 | ||
15ad7146 AK |
3827 | cpu = get_cpu(); |
3828 | vmx_vcpu_load(&vmx->vcpu, cpu); | |
8b9cf98c | 3829 | err = vmx_vcpu_setup(vmx); |
fb3f0f51 | 3830 | vmx_vcpu_put(&vmx->vcpu); |
15ad7146 | 3831 | put_cpu(); |
fb3f0f51 RR |
3832 | if (err) |
3833 | goto free_vmcs; | |
5e4a0b3c MT |
3834 | if (vm_need_virtualize_apic_accesses(kvm)) |
3835 | if (alloc_apic_access_page(kvm) != 0) | |
3836 | goto free_vmcs; | |
fb3f0f51 | 3837 | |
b927a3ce SY |
3838 | if (enable_ept) { |
3839 | if (!kvm->arch.ept_identity_map_addr) | |
3840 | kvm->arch.ept_identity_map_addr = | |
3841 | VMX_EPT_IDENTITY_PAGETABLE_ADDR; | |
b7ebfb05 SY |
3842 | if (alloc_identity_pagetable(kvm) != 0) |
3843 | goto free_vmcs; | |
b927a3ce | 3844 | } |
b7ebfb05 | 3845 | |
fb3f0f51 RR |
3846 | return &vmx->vcpu; |
3847 | ||
3848 | free_vmcs: | |
3849 | free_vmcs(vmx->vmcs); | |
3850 | free_msrs: | |
fb3f0f51 RR |
3851 | kfree(vmx->guest_msrs); |
3852 | uninit_vcpu: | |
3853 | kvm_vcpu_uninit(&vmx->vcpu); | |
3854 | free_vcpu: | |
a4770347 | 3855 | kmem_cache_free(kvm_vcpu_cache, vmx); |
fb3f0f51 | 3856 | return ERR_PTR(err); |
6aa8b732 AK |
3857 | } |
3858 | ||
002c7f7c YS |
3859 | static void __init vmx_check_processor_compat(void *rtn) |
3860 | { | |
3861 | struct vmcs_config vmcs_conf; | |
3862 | ||
3863 | *(int *)rtn = 0; | |
3864 | if (setup_vmcs_config(&vmcs_conf) < 0) | |
3865 | *(int *)rtn = -EIO; | |
3866 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { | |
3867 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", | |
3868 | smp_processor_id()); | |
3869 | *(int *)rtn = -EIO; | |
3870 | } | |
3871 | } | |
3872 | ||
67253af5 SY |
3873 | static int get_ept_level(void) |
3874 | { | |
3875 | return VMX_EPT_DEFAULT_GAW + 1; | |
3876 | } | |
3877 | ||
4b12f0de | 3878 | static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) |
64d4d521 | 3879 | { |
4b12f0de SY |
3880 | u64 ret; |
3881 | ||
522c68c4 SY |
3882 | /* For VT-d and EPT combination |
3883 | * 1. MMIO: always map as UC | |
3884 | * 2. EPT with VT-d: | |
3885 | * a. VT-d without snooping control feature: can't guarantee the | |
3886 | * result, try to trust guest. | |
3887 | * b. VT-d with snooping control feature: snooping control feature of | |
3888 | * VT-d engine can guarantee the cache correctness. Just set it | |
3889 | * to WB to keep consistent with host. So the same as item 3. | |
3890 | * 3. EPT without VT-d: always map as WB and set IGMT=1 to keep | |
3891 | * consistent with host MTRR | |
3892 | */ | |
4b12f0de SY |
3893 | if (is_mmio) |
3894 | ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT; | |
522c68c4 SY |
3895 | else if (vcpu->kvm->arch.iommu_domain && |
3896 | !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY)) | |
3897 | ret = kvm_get_guest_memory_type(vcpu, gfn) << | |
3898 | VMX_EPT_MT_EPTE_SHIFT; | |
4b12f0de | 3899 | else |
522c68c4 SY |
3900 | ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT) |
3901 | | VMX_EPT_IGMT_BIT; | |
4b12f0de SY |
3902 | |
3903 | return ret; | |
64d4d521 SY |
3904 | } |
3905 | ||
229456fc MT |
3906 | static const struct trace_print_flags vmx_exit_reasons_str[] = { |
3907 | { EXIT_REASON_EXCEPTION_NMI, "exception" }, | |
3908 | { EXIT_REASON_EXTERNAL_INTERRUPT, "ext_irq" }, | |
3909 | { EXIT_REASON_TRIPLE_FAULT, "triple_fault" }, | |
3910 | { EXIT_REASON_NMI_WINDOW, "nmi_window" }, | |
3911 | { EXIT_REASON_IO_INSTRUCTION, "io_instruction" }, | |
3912 | { EXIT_REASON_CR_ACCESS, "cr_access" }, | |
3913 | { EXIT_REASON_DR_ACCESS, "dr_access" }, | |
3914 | { EXIT_REASON_CPUID, "cpuid" }, | |
3915 | { EXIT_REASON_MSR_READ, "rdmsr" }, | |
3916 | { EXIT_REASON_MSR_WRITE, "wrmsr" }, | |
3917 | { EXIT_REASON_PENDING_INTERRUPT, "interrupt_window" }, | |
3918 | { EXIT_REASON_HLT, "halt" }, | |
3919 | { EXIT_REASON_INVLPG, "invlpg" }, | |
3920 | { EXIT_REASON_VMCALL, "hypercall" }, | |
3921 | { EXIT_REASON_TPR_BELOW_THRESHOLD, "tpr_below_thres" }, | |
3922 | { EXIT_REASON_APIC_ACCESS, "apic_access" }, | |
3923 | { EXIT_REASON_WBINVD, "wbinvd" }, | |
3924 | { EXIT_REASON_TASK_SWITCH, "task_switch" }, | |
3925 | { EXIT_REASON_EPT_VIOLATION, "ept_violation" }, | |
3926 | { -1, NULL } | |
3927 | }; | |
3928 | ||
344f414f JR |
3929 | static bool vmx_gb_page_enable(void) |
3930 | { | |
3931 | return false; | |
3932 | } | |
3933 | ||
cbdd1bea | 3934 | static struct kvm_x86_ops vmx_x86_ops = { |
6aa8b732 AK |
3935 | .cpu_has_kvm_support = cpu_has_kvm_support, |
3936 | .disabled_by_bios = vmx_disabled_by_bios, | |
3937 | .hardware_setup = hardware_setup, | |
3938 | .hardware_unsetup = hardware_unsetup, | |
002c7f7c | 3939 | .check_processor_compatibility = vmx_check_processor_compat, |
6aa8b732 AK |
3940 | .hardware_enable = hardware_enable, |
3941 | .hardware_disable = hardware_disable, | |
04547156 | 3942 | .cpu_has_accelerated_tpr = report_flexpriority, |
6aa8b732 AK |
3943 | |
3944 | .vcpu_create = vmx_create_vcpu, | |
3945 | .vcpu_free = vmx_free_vcpu, | |
04d2cc77 | 3946 | .vcpu_reset = vmx_vcpu_reset, |
6aa8b732 | 3947 | |
04d2cc77 | 3948 | .prepare_guest_switch = vmx_save_host_state, |
6aa8b732 AK |
3949 | .vcpu_load = vmx_vcpu_load, |
3950 | .vcpu_put = vmx_vcpu_put, | |
3951 | ||
3952 | .set_guest_debug = set_guest_debug, | |
3953 | .get_msr = vmx_get_msr, | |
3954 | .set_msr = vmx_set_msr, | |
3955 | .get_segment_base = vmx_get_segment_base, | |
3956 | .get_segment = vmx_get_segment, | |
3957 | .set_segment = vmx_set_segment, | |
2e4d2653 | 3958 | .get_cpl = vmx_get_cpl, |
6aa8b732 | 3959 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
25c4c276 | 3960 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
6aa8b732 | 3961 | .set_cr0 = vmx_set_cr0, |
6aa8b732 AK |
3962 | .set_cr3 = vmx_set_cr3, |
3963 | .set_cr4 = vmx_set_cr4, | |
6aa8b732 | 3964 | .set_efer = vmx_set_efer, |
6aa8b732 AK |
3965 | .get_idt = vmx_get_idt, |
3966 | .set_idt = vmx_set_idt, | |
3967 | .get_gdt = vmx_get_gdt, | |
3968 | .set_gdt = vmx_set_gdt, | |
5fdbf976 | 3969 | .cache_reg = vmx_cache_reg, |
6aa8b732 AK |
3970 | .get_rflags = vmx_get_rflags, |
3971 | .set_rflags = vmx_set_rflags, | |
3972 | ||
3973 | .tlb_flush = vmx_flush_tlb, | |
6aa8b732 | 3974 | |
6aa8b732 | 3975 | .run = vmx_vcpu_run, |
6062d012 | 3976 | .handle_exit = vmx_handle_exit, |
6aa8b732 | 3977 | .skip_emulated_instruction = skip_emulated_instruction, |
2809f5d2 GC |
3978 | .set_interrupt_shadow = vmx_set_interrupt_shadow, |
3979 | .get_interrupt_shadow = vmx_get_interrupt_shadow, | |
102d8325 | 3980 | .patch_hypercall = vmx_patch_hypercall, |
2a8067f1 | 3981 | .set_irq = vmx_inject_irq, |
95ba8273 | 3982 | .set_nmi = vmx_inject_nmi, |
298101da | 3983 | .queue_exception = vmx_queue_exception, |
78646121 | 3984 | .interrupt_allowed = vmx_interrupt_allowed, |
95ba8273 GN |
3985 | .nmi_allowed = vmx_nmi_allowed, |
3986 | .enable_nmi_window = enable_nmi_window, | |
3987 | .enable_irq_window = enable_irq_window, | |
3988 | .update_cr8_intercept = update_cr8_intercept, | |
95ba8273 | 3989 | |
cbc94022 | 3990 | .set_tss_addr = vmx_set_tss_addr, |
67253af5 | 3991 | .get_tdp_level = get_ept_level, |
4b12f0de | 3992 | .get_mt_mask = vmx_get_mt_mask, |
229456fc MT |
3993 | |
3994 | .exit_reasons_str = vmx_exit_reasons_str, | |
344f414f | 3995 | .gb_page_enable = vmx_gb_page_enable, |
6aa8b732 AK |
3996 | }; |
3997 | ||
3998 | static int __init vmx_init(void) | |
3999 | { | |
26bb0981 AK |
4000 | int r, i; |
4001 | ||
4002 | rdmsrl_safe(MSR_EFER, &host_efer); | |
4003 | ||
4004 | for (i = 0; i < NR_VMX_MSR; ++i) | |
4005 | kvm_define_shared_msr(i, vmx_msr_index[i]); | |
fdef3ad1 | 4006 | |
3e7c73e9 | 4007 | vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL); |
fdef3ad1 HQ |
4008 | if (!vmx_io_bitmap_a) |
4009 | return -ENOMEM; | |
4010 | ||
3e7c73e9 | 4011 | vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL); |
fdef3ad1 HQ |
4012 | if (!vmx_io_bitmap_b) { |
4013 | r = -ENOMEM; | |
4014 | goto out; | |
4015 | } | |
4016 | ||
5897297b AK |
4017 | vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL); |
4018 | if (!vmx_msr_bitmap_legacy) { | |
25c5f225 SY |
4019 | r = -ENOMEM; |
4020 | goto out1; | |
4021 | } | |
4022 | ||
5897297b AK |
4023 | vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL); |
4024 | if (!vmx_msr_bitmap_longmode) { | |
4025 | r = -ENOMEM; | |
4026 | goto out2; | |
4027 | } | |
4028 | ||
fdef3ad1 HQ |
4029 | /* |
4030 | * Allow direct access to the PC debug port (it is often used for I/O | |
4031 | * delays, but the vmexits simply slow things down). | |
4032 | */ | |
3e7c73e9 AK |
4033 | memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE); |
4034 | clear_bit(0x80, vmx_io_bitmap_a); | |
fdef3ad1 | 4035 | |
3e7c73e9 | 4036 | memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE); |
fdef3ad1 | 4037 | |
5897297b AK |
4038 | memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE); |
4039 | memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE); | |
25c5f225 | 4040 | |
2384d2b3 SY |
4041 | set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */ |
4042 | ||
cb498ea2 | 4043 | r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE); |
fdef3ad1 | 4044 | if (r) |
5897297b | 4045 | goto out3; |
25c5f225 | 4046 | |
5897297b AK |
4047 | vmx_disable_intercept_for_msr(MSR_FS_BASE, false); |
4048 | vmx_disable_intercept_for_msr(MSR_GS_BASE, false); | |
4049 | vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true); | |
4050 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false); | |
4051 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false); | |
4052 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false); | |
fdef3ad1 | 4053 | |
089d034e | 4054 | if (enable_ept) { |
1439442c | 4055 | bypass_guest_pf = 0; |
5fdbcb9d | 4056 | kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK | |
2aaf69dc | 4057 | VMX_EPT_WRITABLE_MASK); |
534e38b4 | 4058 | kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull, |
4b12f0de | 4059 | VMX_EPT_EXECUTABLE_MASK); |
5fdbcb9d SY |
4060 | kvm_enable_tdp(); |
4061 | } else | |
4062 | kvm_disable_tdp(); | |
1439442c | 4063 | |
c7addb90 AK |
4064 | if (bypass_guest_pf) |
4065 | kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull); | |
4066 | ||
fdef3ad1 HQ |
4067 | return 0; |
4068 | ||
5897297b AK |
4069 | out3: |
4070 | free_page((unsigned long)vmx_msr_bitmap_longmode); | |
25c5f225 | 4071 | out2: |
5897297b | 4072 | free_page((unsigned long)vmx_msr_bitmap_legacy); |
fdef3ad1 | 4073 | out1: |
3e7c73e9 | 4074 | free_page((unsigned long)vmx_io_bitmap_b); |
fdef3ad1 | 4075 | out: |
3e7c73e9 | 4076 | free_page((unsigned long)vmx_io_bitmap_a); |
fdef3ad1 | 4077 | return r; |
6aa8b732 AK |
4078 | } |
4079 | ||
4080 | static void __exit vmx_exit(void) | |
4081 | { | |
5897297b AK |
4082 | free_page((unsigned long)vmx_msr_bitmap_legacy); |
4083 | free_page((unsigned long)vmx_msr_bitmap_longmode); | |
3e7c73e9 AK |
4084 | free_page((unsigned long)vmx_io_bitmap_b); |
4085 | free_page((unsigned long)vmx_io_bitmap_a); | |
fdef3ad1 | 4086 | |
cb498ea2 | 4087 | kvm_exit(); |
6aa8b732 AK |
4088 | } |
4089 | ||
4090 | module_init(vmx_init) | |
4091 | module_exit(vmx_exit) |