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Commit | Line | Data |
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6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * AMD SVM support | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
9611c187 | 7 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
6aa8b732 AK |
8 | * |
9 | * Authors: | |
10 | * Yaniv Kamay <yaniv@qumranet.com> | |
11 | * Avi Kivity <avi@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 | */ | |
44a95dae SS |
17 | |
18 | #define pr_fmt(fmt) "SVM: " fmt | |
19 | ||
edf88417 AK |
20 | #include <linux/kvm_host.h> |
21 | ||
85f455f7 | 22 | #include "irq.h" |
1d737c8a | 23 | #include "mmu.h" |
5fdbf976 | 24 | #include "kvm_cache_regs.h" |
fe4c7b19 | 25 | #include "x86.h" |
66f7b72e | 26 | #include "cpuid.h" |
25462f7f | 27 | #include "pmu.h" |
e495606d | 28 | |
6aa8b732 | 29 | #include <linux/module.h> |
ae759544 | 30 | #include <linux/mod_devicetable.h> |
9d8f549d | 31 | #include <linux/kernel.h> |
6aa8b732 AK |
32 | #include <linux/vmalloc.h> |
33 | #include <linux/highmem.h> | |
e8edc6e0 | 34 | #include <linux/sched.h> |
af658dca | 35 | #include <linux/trace_events.h> |
5a0e3ad6 | 36 | #include <linux/slab.h> |
5881f737 SS |
37 | #include <linux/amd-iommu.h> |
38 | #include <linux/hashtable.h> | |
6aa8b732 | 39 | |
8221c137 | 40 | #include <asm/apic.h> |
1018faa6 | 41 | #include <asm/perf_event.h> |
67ec6607 | 42 | #include <asm/tlbflush.h> |
e495606d | 43 | #include <asm/desc.h> |
facb0139 | 44 | #include <asm/debugreg.h> |
631bc487 | 45 | #include <asm/kvm_para.h> |
411b44ba | 46 | #include <asm/irq_remapping.h> |
6aa8b732 | 47 | |
63d1142f | 48 | #include <asm/virtext.h> |
229456fc | 49 | #include "trace.h" |
63d1142f | 50 | |
4ecac3fd AK |
51 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
52 | ||
6aa8b732 AK |
53 | MODULE_AUTHOR("Qumranet"); |
54 | MODULE_LICENSE("GPL"); | |
55 | ||
ae759544 JT |
56 | static const struct x86_cpu_id svm_cpu_id[] = { |
57 | X86_FEATURE_MATCH(X86_FEATURE_SVM), | |
58 | {} | |
59 | }; | |
60 | MODULE_DEVICE_TABLE(x86cpu, svm_cpu_id); | |
61 | ||
6aa8b732 AK |
62 | #define IOPM_ALLOC_ORDER 2 |
63 | #define MSRPM_ALLOC_ORDER 1 | |
64 | ||
6aa8b732 AK |
65 | #define SEG_TYPE_LDT 2 |
66 | #define SEG_TYPE_BUSY_TSS16 3 | |
67 | ||
6bc31bdc AP |
68 | #define SVM_FEATURE_NPT (1 << 0) |
69 | #define SVM_FEATURE_LBRV (1 << 1) | |
70 | #define SVM_FEATURE_SVML (1 << 2) | |
71 | #define SVM_FEATURE_NRIP (1 << 3) | |
ddce97aa AP |
72 | #define SVM_FEATURE_TSC_RATE (1 << 4) |
73 | #define SVM_FEATURE_VMCB_CLEAN (1 << 5) | |
74 | #define SVM_FEATURE_FLUSH_ASID (1 << 6) | |
75 | #define SVM_FEATURE_DECODE_ASSIST (1 << 7) | |
6bc31bdc | 76 | #define SVM_FEATURE_PAUSE_FILTER (1 << 10) |
80b7706e | 77 | |
340d3bc3 SS |
78 | #define SVM_AVIC_DOORBELL 0xc001011b |
79 | ||
410e4d57 JR |
80 | #define NESTED_EXIT_HOST 0 /* Exit handled on host level */ |
81 | #define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */ | |
82 | #define NESTED_EXIT_CONTINUE 2 /* Further checks needed */ | |
83 | ||
24e09cbf JR |
84 | #define DEBUGCTL_RESERVED_BITS (~(0x3fULL)) |
85 | ||
fbc0db76 | 86 | #define TSC_RATIO_RSVD 0xffffff0000000000ULL |
92a1f12d JR |
87 | #define TSC_RATIO_MIN 0x0000000000000001ULL |
88 | #define TSC_RATIO_MAX 0x000000ffffffffffULL | |
fbc0db76 | 89 | |
5446a979 | 90 | #define AVIC_HPA_MASK ~((0xFFFULL << 52) | 0xFFF) |
44a95dae SS |
91 | |
92 | /* | |
93 | * 0xff is broadcast, so the max index allowed for physical APIC ID | |
94 | * table is 0xfe. APIC IDs above 0xff are reserved. | |
95 | */ | |
96 | #define AVIC_MAX_PHYSICAL_ID_COUNT 255 | |
97 | ||
18f40c53 SS |
98 | #define AVIC_UNACCEL_ACCESS_WRITE_MASK 1 |
99 | #define AVIC_UNACCEL_ACCESS_OFFSET_MASK 0xFF0 | |
100 | #define AVIC_UNACCEL_ACCESS_VECTOR_MASK 0xFFFFFFFF | |
101 | ||
5ea11f2b SS |
102 | /* AVIC GATAG is encoded using VM and VCPU IDs */ |
103 | #define AVIC_VCPU_ID_BITS 8 | |
104 | #define AVIC_VCPU_ID_MASK ((1 << AVIC_VCPU_ID_BITS) - 1) | |
105 | ||
106 | #define AVIC_VM_ID_BITS 24 | |
107 | #define AVIC_VM_ID_NR (1 << AVIC_VM_ID_BITS) | |
108 | #define AVIC_VM_ID_MASK ((1 << AVIC_VM_ID_BITS) - 1) | |
109 | ||
110 | #define AVIC_GATAG(x, y) (((x & AVIC_VM_ID_MASK) << AVIC_VCPU_ID_BITS) | \ | |
111 | (y & AVIC_VCPU_ID_MASK)) | |
112 | #define AVIC_GATAG_TO_VMID(x) ((x >> AVIC_VCPU_ID_BITS) & AVIC_VM_ID_MASK) | |
113 | #define AVIC_GATAG_TO_VCPUID(x) (x & AVIC_VCPU_ID_MASK) | |
114 | ||
67ec6607 JR |
115 | static bool erratum_383_found __read_mostly; |
116 | ||
6c8166a7 AK |
117 | static const u32 host_save_user_msrs[] = { |
118 | #ifdef CONFIG_X86_64 | |
119 | MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE, | |
120 | MSR_FS_BASE, | |
121 | #endif | |
122 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
46896c73 | 123 | MSR_TSC_AUX, |
6c8166a7 AK |
124 | }; |
125 | ||
126 | #define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs) | |
127 | ||
128 | struct kvm_vcpu; | |
129 | ||
e6aa9abd JR |
130 | struct nested_state { |
131 | struct vmcb *hsave; | |
132 | u64 hsave_msr; | |
4a810181 | 133 | u64 vm_cr_msr; |
e6aa9abd JR |
134 | u64 vmcb; |
135 | ||
136 | /* These are the merged vectors */ | |
137 | u32 *msrpm; | |
138 | ||
139 | /* gpa pointers to the real vectors */ | |
140 | u64 vmcb_msrpm; | |
ce2ac085 | 141 | u64 vmcb_iopm; |
aad42c64 | 142 | |
cd3ff653 JR |
143 | /* A VMEXIT is required but not yet emulated */ |
144 | bool exit_required; | |
145 | ||
aad42c64 | 146 | /* cache for intercepts of the guest */ |
4ee546b4 | 147 | u32 intercept_cr; |
3aed041a | 148 | u32 intercept_dr; |
aad42c64 JR |
149 | u32 intercept_exceptions; |
150 | u64 intercept; | |
151 | ||
5bd2edc3 JR |
152 | /* Nested Paging related state */ |
153 | u64 nested_cr3; | |
e6aa9abd JR |
154 | }; |
155 | ||
323c3d80 JR |
156 | #define MSRPM_OFFSETS 16 |
157 | static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly; | |
158 | ||
2b036c6b BO |
159 | /* |
160 | * Set osvw_len to higher value when updated Revision Guides | |
161 | * are published and we know what the new status bits are | |
162 | */ | |
163 | static uint64_t osvw_len = 4, osvw_status; | |
164 | ||
6c8166a7 AK |
165 | struct vcpu_svm { |
166 | struct kvm_vcpu vcpu; | |
167 | struct vmcb *vmcb; | |
168 | unsigned long vmcb_pa; | |
169 | struct svm_cpu_data *svm_data; | |
170 | uint64_t asid_generation; | |
171 | uint64_t sysenter_esp; | |
172 | uint64_t sysenter_eip; | |
46896c73 | 173 | uint64_t tsc_aux; |
6c8166a7 AK |
174 | |
175 | u64 next_rip; | |
176 | ||
177 | u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS]; | |
afe9e66f | 178 | struct { |
dacccfdd AK |
179 | u16 fs; |
180 | u16 gs; | |
181 | u16 ldt; | |
afe9e66f AK |
182 | u64 gs_base; |
183 | } host; | |
6c8166a7 AK |
184 | |
185 | u32 *msrpm; | |
6c8166a7 | 186 | |
bd3d1ec3 AK |
187 | ulong nmi_iret_rip; |
188 | ||
e6aa9abd | 189 | struct nested_state nested; |
6be7d306 JK |
190 | |
191 | bool nmi_singlestep; | |
66b7138f JK |
192 | |
193 | unsigned int3_injected; | |
194 | unsigned long int3_rip; | |
631bc487 | 195 | u32 apf_reason; |
fbc0db76 | 196 | |
6092d3d3 JR |
197 | /* cached guest cpuid flags for faster access */ |
198 | bool nrips_enabled : 1; | |
44a95dae | 199 | |
18f40c53 | 200 | u32 ldr_reg; |
44a95dae SS |
201 | struct page *avic_backing_page; |
202 | u64 *avic_physical_id_cache; | |
8221c137 | 203 | bool avic_is_running; |
411b44ba SS |
204 | |
205 | /* | |
206 | * Per-vcpu list of struct amd_svm_iommu_ir: | |
207 | * This is used mainly to store interrupt remapping information used | |
208 | * when update the vcpu affinity. This avoids the need to scan for | |
209 | * IRTE and try to match ga_tag in the IOMMU driver. | |
210 | */ | |
211 | struct list_head ir_list; | |
212 | spinlock_t ir_list_lock; | |
213 | }; | |
214 | ||
215 | /* | |
216 | * This is a wrapper of struct amd_iommu_ir_data. | |
217 | */ | |
218 | struct amd_svm_iommu_ir { | |
219 | struct list_head node; /* Used by SVM for per-vcpu ir_list */ | |
220 | void *data; /* Storing pointer to struct amd_ir_data */ | |
6c8166a7 AK |
221 | }; |
222 | ||
44a95dae SS |
223 | #define AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK (0xFF) |
224 | #define AVIC_LOGICAL_ID_ENTRY_VALID_MASK (1 << 31) | |
225 | ||
226 | #define AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK (0xFFULL) | |
227 | #define AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK (0xFFFFFFFFFFULL << 12) | |
228 | #define AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK (1ULL << 62) | |
229 | #define AVIC_PHYSICAL_ID_ENTRY_VALID_MASK (1ULL << 63) | |
230 | ||
fbc0db76 JR |
231 | static DEFINE_PER_CPU(u64, current_tsc_ratio); |
232 | #define TSC_RATIO_DEFAULT 0x0100000000ULL | |
233 | ||
455716fa JR |
234 | #define MSR_INVALID 0xffffffffU |
235 | ||
09941fbb | 236 | static const struct svm_direct_access_msrs { |
ac72a9b7 JR |
237 | u32 index; /* Index of the MSR */ |
238 | bool always; /* True if intercept is always on */ | |
239 | } direct_access_msrs[] = { | |
8c06585d | 240 | { .index = MSR_STAR, .always = true }, |
ac72a9b7 JR |
241 | { .index = MSR_IA32_SYSENTER_CS, .always = true }, |
242 | #ifdef CONFIG_X86_64 | |
243 | { .index = MSR_GS_BASE, .always = true }, | |
244 | { .index = MSR_FS_BASE, .always = true }, | |
245 | { .index = MSR_KERNEL_GS_BASE, .always = true }, | |
246 | { .index = MSR_LSTAR, .always = true }, | |
247 | { .index = MSR_CSTAR, .always = true }, | |
248 | { .index = MSR_SYSCALL_MASK, .always = true }, | |
249 | #endif | |
250 | { .index = MSR_IA32_LASTBRANCHFROMIP, .always = false }, | |
251 | { .index = MSR_IA32_LASTBRANCHTOIP, .always = false }, | |
252 | { .index = MSR_IA32_LASTINTFROMIP, .always = false }, | |
253 | { .index = MSR_IA32_LASTINTTOIP, .always = false }, | |
254 | { .index = MSR_INVALID, .always = false }, | |
6c8166a7 AK |
255 | }; |
256 | ||
709ddebf JR |
257 | /* enable NPT for AMD64 and X86 with PAE */ |
258 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) | |
259 | static bool npt_enabled = true; | |
260 | #else | |
e0231715 | 261 | static bool npt_enabled; |
709ddebf | 262 | #endif |
6c7dac72 | 263 | |
e2358851 DB |
264 | /* allow nested paging (virtualized MMU) for all guests */ |
265 | static int npt = true; | |
6c7dac72 | 266 | module_param(npt, int, S_IRUGO); |
e3da3acd | 267 | |
e2358851 DB |
268 | /* allow nested virtualization in KVM/SVM */ |
269 | static int nested = true; | |
236de055 AG |
270 | module_param(nested, int, S_IRUGO); |
271 | ||
44a95dae SS |
272 | /* enable / disable AVIC */ |
273 | static int avic; | |
5b8abf1f | 274 | #ifdef CONFIG_X86_LOCAL_APIC |
44a95dae | 275 | module_param(avic, int, S_IRUGO); |
5b8abf1f | 276 | #endif |
44a95dae | 277 | |
5ea11f2b SS |
278 | /* AVIC VM ID bit masks and lock */ |
279 | static DECLARE_BITMAP(avic_vm_id_bitmap, AVIC_VM_ID_NR); | |
280 | static DEFINE_SPINLOCK(avic_vm_id_lock); | |
281 | ||
79a8059d | 282 | static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); |
44874f84 | 283 | static void svm_flush_tlb(struct kvm_vcpu *vcpu); |
a5c3832d | 284 | static void svm_complete_interrupts(struct vcpu_svm *svm); |
04d2cc77 | 285 | |
410e4d57 | 286 | static int nested_svm_exit_handled(struct vcpu_svm *svm); |
b8e88bc8 | 287 | static int nested_svm_intercept(struct vcpu_svm *svm); |
cf74a78b | 288 | static int nested_svm_vmexit(struct vcpu_svm *svm); |
cf74a78b AG |
289 | static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, |
290 | bool has_error_code, u32 error_code); | |
291 | ||
8d28fec4 | 292 | enum { |
116a0a23 JR |
293 | VMCB_INTERCEPTS, /* Intercept vectors, TSC offset, |
294 | pause filter count */ | |
f56838e4 | 295 | VMCB_PERM_MAP, /* IOPM Base and MSRPM Base */ |
d48086d1 | 296 | VMCB_ASID, /* ASID */ |
decdbf6a | 297 | VMCB_INTR, /* int_ctl, int_vector */ |
b2747166 | 298 | VMCB_NPT, /* npt_en, nCR3, gPAT */ |
dcca1a65 | 299 | VMCB_CR, /* CR0, CR3, CR4, EFER */ |
72214b96 | 300 | VMCB_DR, /* DR6, DR7 */ |
17a703cb | 301 | VMCB_DT, /* GDT, IDT */ |
060d0c9a | 302 | VMCB_SEG, /* CS, DS, SS, ES, CPL */ |
0574dec0 | 303 | VMCB_CR2, /* CR2 only */ |
b53ba3f9 | 304 | VMCB_LBR, /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */ |
44a95dae SS |
305 | VMCB_AVIC, /* AVIC APIC_BAR, AVIC APIC_BACKING_PAGE, |
306 | * AVIC PHYSICAL_TABLE pointer, | |
307 | * AVIC LOGICAL_TABLE pointer | |
308 | */ | |
8d28fec4 RJ |
309 | VMCB_DIRTY_MAX, |
310 | }; | |
311 | ||
0574dec0 JR |
312 | /* TPR and CR2 are always written before VMRUN */ |
313 | #define VMCB_ALWAYS_DIRTY_MASK ((1U << VMCB_INTR) | (1U << VMCB_CR2)) | |
8d28fec4 | 314 | |
44a95dae SS |
315 | #define VMCB_AVIC_APIC_BAR_MASK 0xFFFFFFFFFF000ULL |
316 | ||
8d28fec4 RJ |
317 | static inline void mark_all_dirty(struct vmcb *vmcb) |
318 | { | |
319 | vmcb->control.clean = 0; | |
320 | } | |
321 | ||
322 | static inline void mark_all_clean(struct vmcb *vmcb) | |
323 | { | |
324 | vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1) | |
325 | & ~VMCB_ALWAYS_DIRTY_MASK; | |
326 | } | |
327 | ||
328 | static inline void mark_dirty(struct vmcb *vmcb, int bit) | |
329 | { | |
330 | vmcb->control.clean &= ~(1 << bit); | |
331 | } | |
332 | ||
a2fa3e9f GH |
333 | static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu) |
334 | { | |
fb3f0f51 | 335 | return container_of(vcpu, struct vcpu_svm, vcpu); |
a2fa3e9f GH |
336 | } |
337 | ||
44a95dae SS |
338 | static inline void avic_update_vapic_bar(struct vcpu_svm *svm, u64 data) |
339 | { | |
340 | svm->vmcb->control.avic_vapic_bar = data & VMCB_AVIC_APIC_BAR_MASK; | |
341 | mark_dirty(svm->vmcb, VMCB_AVIC); | |
342 | } | |
343 | ||
340d3bc3 SS |
344 | static inline bool avic_vcpu_is_running(struct kvm_vcpu *vcpu) |
345 | { | |
346 | struct vcpu_svm *svm = to_svm(vcpu); | |
347 | u64 *entry = svm->avic_physical_id_cache; | |
348 | ||
349 | if (!entry) | |
350 | return false; | |
351 | ||
352 | return (READ_ONCE(*entry) & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK); | |
353 | } | |
354 | ||
384c6368 JR |
355 | static void recalc_intercepts(struct vcpu_svm *svm) |
356 | { | |
357 | struct vmcb_control_area *c, *h; | |
358 | struct nested_state *g; | |
359 | ||
116a0a23 JR |
360 | mark_dirty(svm->vmcb, VMCB_INTERCEPTS); |
361 | ||
384c6368 JR |
362 | if (!is_guest_mode(&svm->vcpu)) |
363 | return; | |
364 | ||
365 | c = &svm->vmcb->control; | |
366 | h = &svm->nested.hsave->control; | |
367 | g = &svm->nested; | |
368 | ||
4ee546b4 | 369 | c->intercept_cr = h->intercept_cr | g->intercept_cr; |
3aed041a | 370 | c->intercept_dr = h->intercept_dr | g->intercept_dr; |
384c6368 JR |
371 | c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions; |
372 | c->intercept = h->intercept | g->intercept; | |
373 | } | |
374 | ||
4ee546b4 RJ |
375 | static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm) |
376 | { | |
377 | if (is_guest_mode(&svm->vcpu)) | |
378 | return svm->nested.hsave; | |
379 | else | |
380 | return svm->vmcb; | |
381 | } | |
382 | ||
383 | static inline void set_cr_intercept(struct vcpu_svm *svm, int bit) | |
384 | { | |
385 | struct vmcb *vmcb = get_host_vmcb(svm); | |
386 | ||
387 | vmcb->control.intercept_cr |= (1U << bit); | |
388 | ||
389 | recalc_intercepts(svm); | |
390 | } | |
391 | ||
392 | static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit) | |
393 | { | |
394 | struct vmcb *vmcb = get_host_vmcb(svm); | |
395 | ||
396 | vmcb->control.intercept_cr &= ~(1U << bit); | |
397 | ||
398 | recalc_intercepts(svm); | |
399 | } | |
400 | ||
401 | static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit) | |
402 | { | |
403 | struct vmcb *vmcb = get_host_vmcb(svm); | |
404 | ||
405 | return vmcb->control.intercept_cr & (1U << bit); | |
406 | } | |
407 | ||
5315c716 | 408 | static inline void set_dr_intercepts(struct vcpu_svm *svm) |
3aed041a JR |
409 | { |
410 | struct vmcb *vmcb = get_host_vmcb(svm); | |
411 | ||
5315c716 PB |
412 | vmcb->control.intercept_dr = (1 << INTERCEPT_DR0_READ) |
413 | | (1 << INTERCEPT_DR1_READ) | |
414 | | (1 << INTERCEPT_DR2_READ) | |
415 | | (1 << INTERCEPT_DR3_READ) | |
416 | | (1 << INTERCEPT_DR4_READ) | |
417 | | (1 << INTERCEPT_DR5_READ) | |
418 | | (1 << INTERCEPT_DR6_READ) | |
419 | | (1 << INTERCEPT_DR7_READ) | |
420 | | (1 << INTERCEPT_DR0_WRITE) | |
421 | | (1 << INTERCEPT_DR1_WRITE) | |
422 | | (1 << INTERCEPT_DR2_WRITE) | |
423 | | (1 << INTERCEPT_DR3_WRITE) | |
424 | | (1 << INTERCEPT_DR4_WRITE) | |
425 | | (1 << INTERCEPT_DR5_WRITE) | |
426 | | (1 << INTERCEPT_DR6_WRITE) | |
427 | | (1 << INTERCEPT_DR7_WRITE); | |
3aed041a JR |
428 | |
429 | recalc_intercepts(svm); | |
430 | } | |
431 | ||
5315c716 | 432 | static inline void clr_dr_intercepts(struct vcpu_svm *svm) |
3aed041a JR |
433 | { |
434 | struct vmcb *vmcb = get_host_vmcb(svm); | |
435 | ||
5315c716 | 436 | vmcb->control.intercept_dr = 0; |
3aed041a JR |
437 | |
438 | recalc_intercepts(svm); | |
439 | } | |
440 | ||
18c918c5 JR |
441 | static inline void set_exception_intercept(struct vcpu_svm *svm, int bit) |
442 | { | |
443 | struct vmcb *vmcb = get_host_vmcb(svm); | |
444 | ||
445 | vmcb->control.intercept_exceptions |= (1U << bit); | |
446 | ||
447 | recalc_intercepts(svm); | |
448 | } | |
449 | ||
450 | static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit) | |
451 | { | |
452 | struct vmcb *vmcb = get_host_vmcb(svm); | |
453 | ||
454 | vmcb->control.intercept_exceptions &= ~(1U << bit); | |
455 | ||
456 | recalc_intercepts(svm); | |
457 | } | |
458 | ||
8a05a1b8 JR |
459 | static inline void set_intercept(struct vcpu_svm *svm, int bit) |
460 | { | |
461 | struct vmcb *vmcb = get_host_vmcb(svm); | |
462 | ||
463 | vmcb->control.intercept |= (1ULL << bit); | |
464 | ||
465 | recalc_intercepts(svm); | |
466 | } | |
467 | ||
468 | static inline void clr_intercept(struct vcpu_svm *svm, int bit) | |
469 | { | |
470 | struct vmcb *vmcb = get_host_vmcb(svm); | |
471 | ||
472 | vmcb->control.intercept &= ~(1ULL << bit); | |
473 | ||
474 | recalc_intercepts(svm); | |
475 | } | |
476 | ||
2af9194d JR |
477 | static inline void enable_gif(struct vcpu_svm *svm) |
478 | { | |
479 | svm->vcpu.arch.hflags |= HF_GIF_MASK; | |
480 | } | |
481 | ||
482 | static inline void disable_gif(struct vcpu_svm *svm) | |
483 | { | |
484 | svm->vcpu.arch.hflags &= ~HF_GIF_MASK; | |
485 | } | |
486 | ||
487 | static inline bool gif_set(struct vcpu_svm *svm) | |
488 | { | |
489 | return !!(svm->vcpu.arch.hflags & HF_GIF_MASK); | |
490 | } | |
491 | ||
4866d5e3 | 492 | static unsigned long iopm_base; |
6aa8b732 AK |
493 | |
494 | struct kvm_ldttss_desc { | |
495 | u16 limit0; | |
496 | u16 base0; | |
e0231715 JR |
497 | unsigned base1:8, type:5, dpl:2, p:1; |
498 | unsigned limit1:4, zero0:3, g:1, base2:8; | |
6aa8b732 AK |
499 | u32 base3; |
500 | u32 zero1; | |
501 | } __attribute__((packed)); | |
502 | ||
503 | struct svm_cpu_data { | |
504 | int cpu; | |
505 | ||
5008fdf5 AK |
506 | u64 asid_generation; |
507 | u32 max_asid; | |
508 | u32 next_asid; | |
6aa8b732 AK |
509 | struct kvm_ldttss_desc *tss_desc; |
510 | ||
511 | struct page *save_area; | |
512 | }; | |
513 | ||
514 | static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data); | |
515 | ||
516 | struct svm_init_data { | |
517 | int cpu; | |
518 | int r; | |
519 | }; | |
520 | ||
09941fbb | 521 | static const u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000}; |
6aa8b732 | 522 | |
9d8f549d | 523 | #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges) |
6aa8b732 AK |
524 | #define MSRS_RANGE_SIZE 2048 |
525 | #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2) | |
526 | ||
455716fa JR |
527 | static u32 svm_msrpm_offset(u32 msr) |
528 | { | |
529 | u32 offset; | |
530 | int i; | |
531 | ||
532 | for (i = 0; i < NUM_MSR_MAPS; i++) { | |
533 | if (msr < msrpm_ranges[i] || | |
534 | msr >= msrpm_ranges[i] + MSRS_IN_RANGE) | |
535 | continue; | |
536 | ||
537 | offset = (msr - msrpm_ranges[i]) / 4; /* 4 msrs per u8 */ | |
538 | offset += (i * MSRS_RANGE_SIZE); /* add range offset */ | |
539 | ||
540 | /* Now we have the u8 offset - but need the u32 offset */ | |
541 | return offset / 4; | |
542 | } | |
543 | ||
544 | /* MSR not in any range */ | |
545 | return MSR_INVALID; | |
546 | } | |
547 | ||
6aa8b732 AK |
548 | #define MAX_INST_SIZE 15 |
549 | ||
6aa8b732 AK |
550 | static inline void clgi(void) |
551 | { | |
4ecac3fd | 552 | asm volatile (__ex(SVM_CLGI)); |
6aa8b732 AK |
553 | } |
554 | ||
555 | static inline void stgi(void) | |
556 | { | |
4ecac3fd | 557 | asm volatile (__ex(SVM_STGI)); |
6aa8b732 AK |
558 | } |
559 | ||
560 | static inline void invlpga(unsigned long addr, u32 asid) | |
561 | { | |
e0231715 | 562 | asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid)); |
6aa8b732 AK |
563 | } |
564 | ||
4b16184c JR |
565 | static int get_npt_level(void) |
566 | { | |
567 | #ifdef CONFIG_X86_64 | |
568 | return PT64_ROOT_LEVEL; | |
569 | #else | |
570 | return PT32E_ROOT_LEVEL; | |
571 | #endif | |
572 | } | |
573 | ||
6aa8b732 AK |
574 | static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
575 | { | |
6dc696d4 | 576 | vcpu->arch.efer = efer; |
709ddebf | 577 | if (!npt_enabled && !(efer & EFER_LMA)) |
2b5203ee | 578 | efer &= ~EFER_LME; |
6aa8b732 | 579 | |
9962d032 | 580 | to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME; |
dcca1a65 | 581 | mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR); |
6aa8b732 AK |
582 | } |
583 | ||
6aa8b732 AK |
584 | static int is_external_interrupt(u32 info) |
585 | { | |
586 | info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID; | |
587 | return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR); | |
588 | } | |
589 | ||
37ccdcbe | 590 | static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu) |
2809f5d2 GC |
591 | { |
592 | struct vcpu_svm *svm = to_svm(vcpu); | |
593 | u32 ret = 0; | |
594 | ||
595 | if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) | |
37ccdcbe PB |
596 | ret = KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS; |
597 | return ret; | |
2809f5d2 GC |
598 | } |
599 | ||
600 | static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
601 | { | |
602 | struct vcpu_svm *svm = to_svm(vcpu); | |
603 | ||
604 | if (mask == 0) | |
605 | svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK; | |
606 | else | |
607 | svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK; | |
608 | ||
609 | } | |
610 | ||
6aa8b732 AK |
611 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
612 | { | |
a2fa3e9f GH |
613 | struct vcpu_svm *svm = to_svm(vcpu); |
614 | ||
f104765b | 615 | if (svm->vmcb->control.next_rip != 0) { |
d2922422 | 616 | WARN_ON_ONCE(!static_cpu_has(X86_FEATURE_NRIPS)); |
6bc31bdc | 617 | svm->next_rip = svm->vmcb->control.next_rip; |
f104765b | 618 | } |
6bc31bdc | 619 | |
a2fa3e9f | 620 | if (!svm->next_rip) { |
51d8b661 | 621 | if (emulate_instruction(vcpu, EMULTYPE_SKIP) != |
f629cf84 GN |
622 | EMULATE_DONE) |
623 | printk(KERN_DEBUG "%s: NOP\n", __func__); | |
6aa8b732 AK |
624 | return; |
625 | } | |
5fdbf976 MT |
626 | if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE) |
627 | printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n", | |
628 | __func__, kvm_rip_read(vcpu), svm->next_rip); | |
6aa8b732 | 629 | |
5fdbf976 | 630 | kvm_rip_write(vcpu, svm->next_rip); |
2809f5d2 | 631 | svm_set_interrupt_shadow(vcpu, 0); |
6aa8b732 AK |
632 | } |
633 | ||
116a4752 | 634 | static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
ce7ddec4 JR |
635 | bool has_error_code, u32 error_code, |
636 | bool reinject) | |
116a4752 JK |
637 | { |
638 | struct vcpu_svm *svm = to_svm(vcpu); | |
639 | ||
e0231715 JR |
640 | /* |
641 | * If we are within a nested VM we'd better #VMEXIT and let the guest | |
642 | * handle the exception | |
643 | */ | |
ce7ddec4 JR |
644 | if (!reinject && |
645 | nested_svm_check_exception(svm, nr, has_error_code, error_code)) | |
116a4752 JK |
646 | return; |
647 | ||
2a6b20b8 | 648 | if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) { |
66b7138f JK |
649 | unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu); |
650 | ||
651 | /* | |
652 | * For guest debugging where we have to reinject #BP if some | |
653 | * INT3 is guest-owned: | |
654 | * Emulate nRIP by moving RIP forward. Will fail if injection | |
655 | * raises a fault that is not intercepted. Still better than | |
656 | * failing in all cases. | |
657 | */ | |
658 | skip_emulated_instruction(&svm->vcpu); | |
659 | rip = kvm_rip_read(&svm->vcpu); | |
660 | svm->int3_rip = rip + svm->vmcb->save.cs.base; | |
661 | svm->int3_injected = rip - old_rip; | |
662 | } | |
663 | ||
116a4752 JK |
664 | svm->vmcb->control.event_inj = nr |
665 | | SVM_EVTINJ_VALID | |
666 | | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0) | |
667 | | SVM_EVTINJ_TYPE_EXEPT; | |
668 | svm->vmcb->control.event_inj_err = error_code; | |
669 | } | |
670 | ||
67ec6607 JR |
671 | static void svm_init_erratum_383(void) |
672 | { | |
673 | u32 low, high; | |
674 | int err; | |
675 | u64 val; | |
676 | ||
e6ee94d5 | 677 | if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH)) |
67ec6607 JR |
678 | return; |
679 | ||
680 | /* Use _safe variants to not break nested virtualization */ | |
681 | val = native_read_msr_safe(MSR_AMD64_DC_CFG, &err); | |
682 | if (err) | |
683 | return; | |
684 | ||
685 | val |= (1ULL << 47); | |
686 | ||
687 | low = lower_32_bits(val); | |
688 | high = upper_32_bits(val); | |
689 | ||
690 | native_write_msr_safe(MSR_AMD64_DC_CFG, low, high); | |
691 | ||
692 | erratum_383_found = true; | |
693 | } | |
694 | ||
2b036c6b BO |
695 | static void svm_init_osvw(struct kvm_vcpu *vcpu) |
696 | { | |
697 | /* | |
698 | * Guests should see errata 400 and 415 as fixed (assuming that | |
699 | * HLT and IO instructions are intercepted). | |
700 | */ | |
701 | vcpu->arch.osvw.length = (osvw_len >= 3) ? (osvw_len) : 3; | |
702 | vcpu->arch.osvw.status = osvw_status & ~(6ULL); | |
703 | ||
704 | /* | |
705 | * By increasing VCPU's osvw.length to 3 we are telling the guest that | |
706 | * all osvw.status bits inside that length, including bit 0 (which is | |
707 | * reserved for erratum 298), are valid. However, if host processor's | |
708 | * osvw_len is 0 then osvw_status[0] carries no information. We need to | |
709 | * be conservative here and therefore we tell the guest that erratum 298 | |
710 | * is present (because we really don't know). | |
711 | */ | |
712 | if (osvw_len == 0 && boot_cpu_data.x86 == 0x10) | |
713 | vcpu->arch.osvw.status |= 1; | |
714 | } | |
715 | ||
6aa8b732 AK |
716 | static int has_svm(void) |
717 | { | |
63d1142f | 718 | const char *msg; |
6aa8b732 | 719 | |
63d1142f | 720 | if (!cpu_has_svm(&msg)) { |
ff81ff10 | 721 | printk(KERN_INFO "has_svm: %s\n", msg); |
6aa8b732 AK |
722 | return 0; |
723 | } | |
724 | ||
6aa8b732 AK |
725 | return 1; |
726 | } | |
727 | ||
13a34e06 | 728 | static void svm_hardware_disable(void) |
6aa8b732 | 729 | { |
fbc0db76 JR |
730 | /* Make sure we clean up behind us */ |
731 | if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) | |
732 | wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT); | |
733 | ||
2c8dceeb | 734 | cpu_svm_disable(); |
1018faa6 JR |
735 | |
736 | amd_pmu_disable_virt(); | |
6aa8b732 AK |
737 | } |
738 | ||
13a34e06 | 739 | static int svm_hardware_enable(void) |
6aa8b732 AK |
740 | { |
741 | ||
0fe1e009 | 742 | struct svm_cpu_data *sd; |
6aa8b732 | 743 | uint64_t efer; |
89a27f4d | 744 | struct desc_ptr gdt_descr; |
6aa8b732 AK |
745 | struct desc_struct *gdt; |
746 | int me = raw_smp_processor_id(); | |
747 | ||
10474ae8 AG |
748 | rdmsrl(MSR_EFER, efer); |
749 | if (efer & EFER_SVME) | |
750 | return -EBUSY; | |
751 | ||
6aa8b732 | 752 | if (!has_svm()) { |
1f5b77f5 | 753 | pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me); |
10474ae8 | 754 | return -EINVAL; |
6aa8b732 | 755 | } |
0fe1e009 | 756 | sd = per_cpu(svm_data, me); |
0fe1e009 | 757 | if (!sd) { |
1f5b77f5 | 758 | pr_err("%s: svm_data is NULL on %d\n", __func__, me); |
10474ae8 | 759 | return -EINVAL; |
6aa8b732 AK |
760 | } |
761 | ||
0fe1e009 TH |
762 | sd->asid_generation = 1; |
763 | sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1; | |
764 | sd->next_asid = sd->max_asid + 1; | |
6aa8b732 | 765 | |
d6ab1ed4 | 766 | native_store_gdt(&gdt_descr); |
89a27f4d | 767 | gdt = (struct desc_struct *)gdt_descr.address; |
0fe1e009 | 768 | sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS); |
6aa8b732 | 769 | |
9962d032 | 770 | wrmsrl(MSR_EFER, efer | EFER_SVME); |
6aa8b732 | 771 | |
d0316554 | 772 | wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT); |
10474ae8 | 773 | |
fbc0db76 JR |
774 | if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) { |
775 | wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT); | |
89cbc767 | 776 | __this_cpu_write(current_tsc_ratio, TSC_RATIO_DEFAULT); |
fbc0db76 JR |
777 | } |
778 | ||
2b036c6b BO |
779 | |
780 | /* | |
781 | * Get OSVW bits. | |
782 | * | |
783 | * Note that it is possible to have a system with mixed processor | |
784 | * revisions and therefore different OSVW bits. If bits are not the same | |
785 | * on different processors then choose the worst case (i.e. if erratum | |
786 | * is present on one processor and not on another then assume that the | |
787 | * erratum is present everywhere). | |
788 | */ | |
789 | if (cpu_has(&boot_cpu_data, X86_FEATURE_OSVW)) { | |
790 | uint64_t len, status = 0; | |
791 | int err; | |
792 | ||
793 | len = native_read_msr_safe(MSR_AMD64_OSVW_ID_LENGTH, &err); | |
794 | if (!err) | |
795 | status = native_read_msr_safe(MSR_AMD64_OSVW_STATUS, | |
796 | &err); | |
797 | ||
798 | if (err) | |
799 | osvw_status = osvw_len = 0; | |
800 | else { | |
801 | if (len < osvw_len) | |
802 | osvw_len = len; | |
803 | osvw_status |= status; | |
804 | osvw_status &= (1ULL << osvw_len) - 1; | |
805 | } | |
806 | } else | |
807 | osvw_status = osvw_len = 0; | |
808 | ||
67ec6607 JR |
809 | svm_init_erratum_383(); |
810 | ||
1018faa6 JR |
811 | amd_pmu_enable_virt(); |
812 | ||
10474ae8 | 813 | return 0; |
6aa8b732 AK |
814 | } |
815 | ||
0da1db75 JR |
816 | static void svm_cpu_uninit(int cpu) |
817 | { | |
0fe1e009 | 818 | struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id()); |
0da1db75 | 819 | |
0fe1e009 | 820 | if (!sd) |
0da1db75 JR |
821 | return; |
822 | ||
823 | per_cpu(svm_data, raw_smp_processor_id()) = NULL; | |
0fe1e009 TH |
824 | __free_page(sd->save_area); |
825 | kfree(sd); | |
0da1db75 JR |
826 | } |
827 | ||
6aa8b732 AK |
828 | static int svm_cpu_init(int cpu) |
829 | { | |
0fe1e009 | 830 | struct svm_cpu_data *sd; |
6aa8b732 AK |
831 | int r; |
832 | ||
0fe1e009 TH |
833 | sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL); |
834 | if (!sd) | |
6aa8b732 | 835 | return -ENOMEM; |
0fe1e009 TH |
836 | sd->cpu = cpu; |
837 | sd->save_area = alloc_page(GFP_KERNEL); | |
6aa8b732 | 838 | r = -ENOMEM; |
0fe1e009 | 839 | if (!sd->save_area) |
6aa8b732 AK |
840 | goto err_1; |
841 | ||
0fe1e009 | 842 | per_cpu(svm_data, cpu) = sd; |
6aa8b732 AK |
843 | |
844 | return 0; | |
845 | ||
846 | err_1: | |
0fe1e009 | 847 | kfree(sd); |
6aa8b732 AK |
848 | return r; |
849 | ||
850 | } | |
851 | ||
ac72a9b7 JR |
852 | static bool valid_msr_intercept(u32 index) |
853 | { | |
854 | int i; | |
855 | ||
856 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) | |
857 | if (direct_access_msrs[i].index == index) | |
858 | return true; | |
859 | ||
860 | return false; | |
861 | } | |
862 | ||
bfc733a7 RR |
863 | static void set_msr_interception(u32 *msrpm, unsigned msr, |
864 | int read, int write) | |
6aa8b732 | 865 | { |
455716fa JR |
866 | u8 bit_read, bit_write; |
867 | unsigned long tmp; | |
868 | u32 offset; | |
6aa8b732 | 869 | |
ac72a9b7 JR |
870 | /* |
871 | * If this warning triggers extend the direct_access_msrs list at the | |
872 | * beginning of the file | |
873 | */ | |
874 | WARN_ON(!valid_msr_intercept(msr)); | |
875 | ||
455716fa JR |
876 | offset = svm_msrpm_offset(msr); |
877 | bit_read = 2 * (msr & 0x0f); | |
878 | bit_write = 2 * (msr & 0x0f) + 1; | |
879 | tmp = msrpm[offset]; | |
880 | ||
881 | BUG_ON(offset == MSR_INVALID); | |
882 | ||
883 | read ? clear_bit(bit_read, &tmp) : set_bit(bit_read, &tmp); | |
884 | write ? clear_bit(bit_write, &tmp) : set_bit(bit_write, &tmp); | |
885 | ||
886 | msrpm[offset] = tmp; | |
6aa8b732 AK |
887 | } |
888 | ||
f65c229c | 889 | static void svm_vcpu_init_msrpm(u32 *msrpm) |
6aa8b732 AK |
890 | { |
891 | int i; | |
892 | ||
f65c229c JR |
893 | memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER)); |
894 | ||
ac72a9b7 JR |
895 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) { |
896 | if (!direct_access_msrs[i].always) | |
897 | continue; | |
898 | ||
899 | set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1); | |
900 | } | |
f65c229c JR |
901 | } |
902 | ||
323c3d80 JR |
903 | static void add_msr_offset(u32 offset) |
904 | { | |
905 | int i; | |
906 | ||
907 | for (i = 0; i < MSRPM_OFFSETS; ++i) { | |
908 | ||
909 | /* Offset already in list? */ | |
910 | if (msrpm_offsets[i] == offset) | |
bfc733a7 | 911 | return; |
323c3d80 JR |
912 | |
913 | /* Slot used by another offset? */ | |
914 | if (msrpm_offsets[i] != MSR_INVALID) | |
915 | continue; | |
916 | ||
917 | /* Add offset to list */ | |
918 | msrpm_offsets[i] = offset; | |
919 | ||
920 | return; | |
6aa8b732 | 921 | } |
323c3d80 JR |
922 | |
923 | /* | |
924 | * If this BUG triggers the msrpm_offsets table has an overflow. Just | |
925 | * increase MSRPM_OFFSETS in this case. | |
926 | */ | |
bfc733a7 | 927 | BUG(); |
6aa8b732 AK |
928 | } |
929 | ||
323c3d80 | 930 | static void init_msrpm_offsets(void) |
f65c229c | 931 | { |
323c3d80 | 932 | int i; |
f65c229c | 933 | |
323c3d80 JR |
934 | memset(msrpm_offsets, 0xff, sizeof(msrpm_offsets)); |
935 | ||
936 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) { | |
937 | u32 offset; | |
938 | ||
939 | offset = svm_msrpm_offset(direct_access_msrs[i].index); | |
940 | BUG_ON(offset == MSR_INVALID); | |
941 | ||
942 | add_msr_offset(offset); | |
943 | } | |
f65c229c JR |
944 | } |
945 | ||
24e09cbf JR |
946 | static void svm_enable_lbrv(struct vcpu_svm *svm) |
947 | { | |
948 | u32 *msrpm = svm->msrpm; | |
949 | ||
950 | svm->vmcb->control.lbr_ctl = 1; | |
951 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1); | |
952 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1); | |
953 | set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1); | |
954 | set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1); | |
955 | } | |
956 | ||
957 | static void svm_disable_lbrv(struct vcpu_svm *svm) | |
958 | { | |
959 | u32 *msrpm = svm->msrpm; | |
960 | ||
961 | svm->vmcb->control.lbr_ctl = 0; | |
962 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0); | |
963 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0); | |
964 | set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0); | |
965 | set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0); | |
966 | } | |
967 | ||
5881f737 SS |
968 | /* Note: |
969 | * This hash table is used to map VM_ID to a struct kvm_arch, | |
970 | * when handling AMD IOMMU GALOG notification to schedule in | |
971 | * a particular vCPU. | |
972 | */ | |
973 | #define SVM_VM_DATA_HASH_BITS 8 | |
681bcea8 DH |
974 | static DEFINE_HASHTABLE(svm_vm_data_hash, SVM_VM_DATA_HASH_BITS); |
975 | static DEFINE_SPINLOCK(svm_vm_data_hash_lock); | |
5881f737 SS |
976 | |
977 | /* Note: | |
978 | * This function is called from IOMMU driver to notify | |
979 | * SVM to schedule in a particular vCPU of a particular VM. | |
980 | */ | |
981 | static int avic_ga_log_notifier(u32 ga_tag) | |
982 | { | |
983 | unsigned long flags; | |
984 | struct kvm_arch *ka = NULL; | |
985 | struct kvm_vcpu *vcpu = NULL; | |
986 | u32 vm_id = AVIC_GATAG_TO_VMID(ga_tag); | |
987 | u32 vcpu_id = AVIC_GATAG_TO_VCPUID(ga_tag); | |
988 | ||
989 | pr_debug("SVM: %s: vm_id=%#x, vcpu_id=%#x\n", __func__, vm_id, vcpu_id); | |
990 | ||
991 | spin_lock_irqsave(&svm_vm_data_hash_lock, flags); | |
992 | hash_for_each_possible(svm_vm_data_hash, ka, hnode, vm_id) { | |
993 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
994 | struct kvm_arch *vm_data = &kvm->arch; | |
995 | ||
996 | if (vm_data->avic_vm_id != vm_id) | |
997 | continue; | |
998 | vcpu = kvm_get_vcpu_by_id(kvm, vcpu_id); | |
999 | break; | |
1000 | } | |
1001 | spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags); | |
1002 | ||
1003 | if (!vcpu) | |
1004 | return 0; | |
1005 | ||
1006 | /* Note: | |
1007 | * At this point, the IOMMU should have already set the pending | |
1008 | * bit in the vAPIC backing page. So, we just need to schedule | |
1009 | * in the vcpu. | |
1010 | */ | |
1011 | if (vcpu->mode == OUTSIDE_GUEST_MODE) | |
1012 | kvm_vcpu_wake_up(vcpu); | |
1013 | ||
1014 | return 0; | |
1015 | } | |
1016 | ||
6aa8b732 AK |
1017 | static __init int svm_hardware_setup(void) |
1018 | { | |
1019 | int cpu; | |
1020 | struct page *iopm_pages; | |
f65c229c | 1021 | void *iopm_va; |
6aa8b732 AK |
1022 | int r; |
1023 | ||
6aa8b732 AK |
1024 | iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER); |
1025 | ||
1026 | if (!iopm_pages) | |
1027 | return -ENOMEM; | |
c8681339 AL |
1028 | |
1029 | iopm_va = page_address(iopm_pages); | |
1030 | memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER)); | |
6aa8b732 AK |
1031 | iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT; |
1032 | ||
323c3d80 JR |
1033 | init_msrpm_offsets(); |
1034 | ||
50a37eb4 JR |
1035 | if (boot_cpu_has(X86_FEATURE_NX)) |
1036 | kvm_enable_efer_bits(EFER_NX); | |
1037 | ||
1b2fd70c AG |
1038 | if (boot_cpu_has(X86_FEATURE_FXSR_OPT)) |
1039 | kvm_enable_efer_bits(EFER_FFXSR); | |
1040 | ||
92a1f12d | 1041 | if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) { |
92a1f12d | 1042 | kvm_has_tsc_control = true; |
bc9b961b HZ |
1043 | kvm_max_tsc_scaling_ratio = TSC_RATIO_MAX; |
1044 | kvm_tsc_scaling_ratio_frac_bits = 32; | |
92a1f12d JR |
1045 | } |
1046 | ||
236de055 AG |
1047 | if (nested) { |
1048 | printk(KERN_INFO "kvm: Nested Virtualization enabled\n"); | |
eec4b140 | 1049 | kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE); |
236de055 AG |
1050 | } |
1051 | ||
3230bb47 | 1052 | for_each_possible_cpu(cpu) { |
6aa8b732 AK |
1053 | r = svm_cpu_init(cpu); |
1054 | if (r) | |
f65c229c | 1055 | goto err; |
6aa8b732 | 1056 | } |
33bd6a0b | 1057 | |
2a6b20b8 | 1058 | if (!boot_cpu_has(X86_FEATURE_NPT)) |
e3da3acd JR |
1059 | npt_enabled = false; |
1060 | ||
6c7dac72 JR |
1061 | if (npt_enabled && !npt) { |
1062 | printk(KERN_INFO "kvm: Nested Paging disabled\n"); | |
1063 | npt_enabled = false; | |
1064 | } | |
1065 | ||
18552672 | 1066 | if (npt_enabled) { |
e3da3acd | 1067 | printk(KERN_INFO "kvm: Nested Paging enabled\n"); |
18552672 | 1068 | kvm_enable_tdp(); |
5f4cb662 JR |
1069 | } else |
1070 | kvm_disable_tdp(); | |
e3da3acd | 1071 | |
5b8abf1f SS |
1072 | if (avic) { |
1073 | if (!npt_enabled || | |
1074 | !boot_cpu_has(X86_FEATURE_AVIC) || | |
5881f737 | 1075 | !IS_ENABLED(CONFIG_X86_LOCAL_APIC)) { |
5b8abf1f | 1076 | avic = false; |
5881f737 | 1077 | } else { |
5b8abf1f | 1078 | pr_info("AVIC enabled\n"); |
5881f737 | 1079 | |
5881f737 SS |
1080 | amd_iommu_register_ga_log_notifier(&avic_ga_log_notifier); |
1081 | } | |
5b8abf1f | 1082 | } |
44a95dae | 1083 | |
6aa8b732 AK |
1084 | return 0; |
1085 | ||
f65c229c | 1086 | err: |
6aa8b732 AK |
1087 | __free_pages(iopm_pages, IOPM_ALLOC_ORDER); |
1088 | iopm_base = 0; | |
1089 | return r; | |
1090 | } | |
1091 | ||
1092 | static __exit void svm_hardware_unsetup(void) | |
1093 | { | |
0da1db75 JR |
1094 | int cpu; |
1095 | ||
3230bb47 | 1096 | for_each_possible_cpu(cpu) |
0da1db75 JR |
1097 | svm_cpu_uninit(cpu); |
1098 | ||
6aa8b732 | 1099 | __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER); |
f65c229c | 1100 | iopm_base = 0; |
6aa8b732 AK |
1101 | } |
1102 | ||
1103 | static void init_seg(struct vmcb_seg *seg) | |
1104 | { | |
1105 | seg->selector = 0; | |
1106 | seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK | | |
e0231715 | 1107 | SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */ |
6aa8b732 AK |
1108 | seg->limit = 0xffff; |
1109 | seg->base = 0; | |
1110 | } | |
1111 | ||
1112 | static void init_sys_seg(struct vmcb_seg *seg, uint32_t type) | |
1113 | { | |
1114 | seg->selector = 0; | |
1115 | seg->attrib = SVM_SELECTOR_P_MASK | type; | |
1116 | seg->limit = 0xffff; | |
1117 | seg->base = 0; | |
1118 | } | |
1119 | ||
f4e1b3c8 ZA |
1120 | static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
1121 | { | |
1122 | struct vcpu_svm *svm = to_svm(vcpu); | |
1123 | u64 g_tsc_offset = 0; | |
1124 | ||
2030753d | 1125 | if (is_guest_mode(vcpu)) { |
f4e1b3c8 ZA |
1126 | g_tsc_offset = svm->vmcb->control.tsc_offset - |
1127 | svm->nested.hsave->control.tsc_offset; | |
1128 | svm->nested.hsave->control.tsc_offset = offset; | |
489223ed YY |
1129 | } else |
1130 | trace_kvm_write_tsc_offset(vcpu->vcpu_id, | |
1131 | svm->vmcb->control.tsc_offset, | |
1132 | offset); | |
f4e1b3c8 ZA |
1133 | |
1134 | svm->vmcb->control.tsc_offset = offset + g_tsc_offset; | |
116a0a23 JR |
1135 | |
1136 | mark_dirty(svm->vmcb, VMCB_INTERCEPTS); | |
f4e1b3c8 ZA |
1137 | } |
1138 | ||
44a95dae SS |
1139 | static void avic_init_vmcb(struct vcpu_svm *svm) |
1140 | { | |
1141 | struct vmcb *vmcb = svm->vmcb; | |
1142 | struct kvm_arch *vm_data = &svm->vcpu.kvm->arch; | |
1143 | phys_addr_t bpa = page_to_phys(svm->avic_backing_page); | |
1144 | phys_addr_t lpa = page_to_phys(vm_data->avic_logical_id_table_page); | |
1145 | phys_addr_t ppa = page_to_phys(vm_data->avic_physical_id_table_page); | |
1146 | ||
1147 | vmcb->control.avic_backing_page = bpa & AVIC_HPA_MASK; | |
1148 | vmcb->control.avic_logical_id = lpa & AVIC_HPA_MASK; | |
1149 | vmcb->control.avic_physical_id = ppa & AVIC_HPA_MASK; | |
1150 | vmcb->control.avic_physical_id |= AVIC_MAX_PHYSICAL_ID_COUNT; | |
1151 | vmcb->control.int_ctl |= AVIC_ENABLE_MASK; | |
1152 | svm->vcpu.arch.apicv_active = true; | |
1153 | } | |
1154 | ||
5690891b | 1155 | static void init_vmcb(struct vcpu_svm *svm) |
6aa8b732 | 1156 | { |
e6101a96 JR |
1157 | struct vmcb_control_area *control = &svm->vmcb->control; |
1158 | struct vmcb_save_area *save = &svm->vmcb->save; | |
6aa8b732 | 1159 | |
bff78274 | 1160 | svm->vcpu.fpu_active = 1; |
4ee546b4 | 1161 | svm->vcpu.arch.hflags = 0; |
bff78274 | 1162 | |
4ee546b4 RJ |
1163 | set_cr_intercept(svm, INTERCEPT_CR0_READ); |
1164 | set_cr_intercept(svm, INTERCEPT_CR3_READ); | |
1165 | set_cr_intercept(svm, INTERCEPT_CR4_READ); | |
1166 | set_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
1167 | set_cr_intercept(svm, INTERCEPT_CR3_WRITE); | |
1168 | set_cr_intercept(svm, INTERCEPT_CR4_WRITE); | |
3bbf3565 SS |
1169 | if (!kvm_vcpu_apicv_active(&svm->vcpu)) |
1170 | set_cr_intercept(svm, INTERCEPT_CR8_WRITE); | |
6aa8b732 | 1171 | |
5315c716 | 1172 | set_dr_intercepts(svm); |
6aa8b732 | 1173 | |
18c918c5 JR |
1174 | set_exception_intercept(svm, PF_VECTOR); |
1175 | set_exception_intercept(svm, UD_VECTOR); | |
1176 | set_exception_intercept(svm, MC_VECTOR); | |
54a20552 | 1177 | set_exception_intercept(svm, AC_VECTOR); |
cbdb967a | 1178 | set_exception_intercept(svm, DB_VECTOR); |
6aa8b732 | 1179 | |
8a05a1b8 JR |
1180 | set_intercept(svm, INTERCEPT_INTR); |
1181 | set_intercept(svm, INTERCEPT_NMI); | |
1182 | set_intercept(svm, INTERCEPT_SMI); | |
1183 | set_intercept(svm, INTERCEPT_SELECTIVE_CR0); | |
332b56e4 | 1184 | set_intercept(svm, INTERCEPT_RDPMC); |
8a05a1b8 JR |
1185 | set_intercept(svm, INTERCEPT_CPUID); |
1186 | set_intercept(svm, INTERCEPT_INVD); | |
1187 | set_intercept(svm, INTERCEPT_HLT); | |
1188 | set_intercept(svm, INTERCEPT_INVLPG); | |
1189 | set_intercept(svm, INTERCEPT_INVLPGA); | |
1190 | set_intercept(svm, INTERCEPT_IOIO_PROT); | |
1191 | set_intercept(svm, INTERCEPT_MSR_PROT); | |
1192 | set_intercept(svm, INTERCEPT_TASK_SWITCH); | |
1193 | set_intercept(svm, INTERCEPT_SHUTDOWN); | |
1194 | set_intercept(svm, INTERCEPT_VMRUN); | |
1195 | set_intercept(svm, INTERCEPT_VMMCALL); | |
1196 | set_intercept(svm, INTERCEPT_VMLOAD); | |
1197 | set_intercept(svm, INTERCEPT_VMSAVE); | |
1198 | set_intercept(svm, INTERCEPT_STGI); | |
1199 | set_intercept(svm, INTERCEPT_CLGI); | |
1200 | set_intercept(svm, INTERCEPT_SKINIT); | |
1201 | set_intercept(svm, INTERCEPT_WBINVD); | |
1202 | set_intercept(svm, INTERCEPT_MONITOR); | |
1203 | set_intercept(svm, INTERCEPT_MWAIT); | |
81dd35d4 | 1204 | set_intercept(svm, INTERCEPT_XSETBV); |
6aa8b732 AK |
1205 | |
1206 | control->iopm_base_pa = iopm_base; | |
f65c229c | 1207 | control->msrpm_base_pa = __pa(svm->msrpm); |
6aa8b732 AK |
1208 | control->int_ctl = V_INTR_MASKING_MASK; |
1209 | ||
1210 | init_seg(&save->es); | |
1211 | init_seg(&save->ss); | |
1212 | init_seg(&save->ds); | |
1213 | init_seg(&save->fs); | |
1214 | init_seg(&save->gs); | |
1215 | ||
1216 | save->cs.selector = 0xf000; | |
04b66839 | 1217 | save->cs.base = 0xffff0000; |
6aa8b732 AK |
1218 | /* Executable/Readable Code Segment */ |
1219 | save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK | | |
1220 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK; | |
1221 | save->cs.limit = 0xffff; | |
6aa8b732 AK |
1222 | |
1223 | save->gdtr.limit = 0xffff; | |
1224 | save->idtr.limit = 0xffff; | |
1225 | ||
1226 | init_sys_seg(&save->ldtr, SEG_TYPE_LDT); | |
1227 | init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16); | |
1228 | ||
5690891b | 1229 | svm_set_efer(&svm->vcpu, 0); |
d77c26fc | 1230 | save->dr6 = 0xffff0ff0; |
f6e78475 | 1231 | kvm_set_rflags(&svm->vcpu, 2); |
6aa8b732 | 1232 | save->rip = 0x0000fff0; |
5fdbf976 | 1233 | svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip; |
6aa8b732 | 1234 | |
e0231715 | 1235 | /* |
18fa000a | 1236 | * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0. |
d28bc9dd | 1237 | * It also updates the guest-visible cr0 value. |
6aa8b732 | 1238 | */ |
79a8059d | 1239 | svm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET); |
ebae871a | 1240 | kvm_mmu_reset_context(&svm->vcpu); |
18fa000a | 1241 | |
66aee91a | 1242 | save->cr4 = X86_CR4_PAE; |
6aa8b732 | 1243 | /* rdx = ?? */ |
709ddebf JR |
1244 | |
1245 | if (npt_enabled) { | |
1246 | /* Setup VMCB for Nested Paging */ | |
1247 | control->nested_ctl = 1; | |
8a05a1b8 | 1248 | clr_intercept(svm, INTERCEPT_INVLPG); |
18c918c5 | 1249 | clr_exception_intercept(svm, PF_VECTOR); |
4ee546b4 RJ |
1250 | clr_cr_intercept(svm, INTERCEPT_CR3_READ); |
1251 | clr_cr_intercept(svm, INTERCEPT_CR3_WRITE); | |
74545705 | 1252 | save->g_pat = svm->vcpu.arch.pat; |
709ddebf JR |
1253 | save->cr3 = 0; |
1254 | save->cr4 = 0; | |
1255 | } | |
f40f6a45 | 1256 | svm->asid_generation = 0; |
1371d904 | 1257 | |
e6aa9abd | 1258 | svm->nested.vmcb = 0; |
2af9194d JR |
1259 | svm->vcpu.arch.hflags = 0; |
1260 | ||
2a6b20b8 | 1261 | if (boot_cpu_has(X86_FEATURE_PAUSEFILTER)) { |
565d0998 | 1262 | control->pause_filter_count = 3000; |
8a05a1b8 | 1263 | set_intercept(svm, INTERCEPT_PAUSE); |
565d0998 ML |
1264 | } |
1265 | ||
44a95dae SS |
1266 | if (avic) |
1267 | avic_init_vmcb(svm); | |
1268 | ||
8d28fec4 RJ |
1269 | mark_all_dirty(svm->vmcb); |
1270 | ||
2af9194d | 1271 | enable_gif(svm); |
44a95dae SS |
1272 | |
1273 | } | |
1274 | ||
1275 | static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu, int index) | |
1276 | { | |
1277 | u64 *avic_physical_id_table; | |
1278 | struct kvm_arch *vm_data = &vcpu->kvm->arch; | |
1279 | ||
1280 | if (index >= AVIC_MAX_PHYSICAL_ID_COUNT) | |
1281 | return NULL; | |
1282 | ||
1283 | avic_physical_id_table = page_address(vm_data->avic_physical_id_table_page); | |
1284 | ||
1285 | return &avic_physical_id_table[index]; | |
1286 | } | |
1287 | ||
1288 | /** | |
1289 | * Note: | |
1290 | * AVIC hardware walks the nested page table to check permissions, | |
1291 | * but does not use the SPA address specified in the leaf page | |
1292 | * table entry since it uses address in the AVIC_BACKING_PAGE pointer | |
1293 | * field of the VMCB. Therefore, we set up the | |
1294 | * APIC_ACCESS_PAGE_PRIVATE_MEMSLOT (4KB) here. | |
1295 | */ | |
1296 | static int avic_init_access_page(struct kvm_vcpu *vcpu) | |
1297 | { | |
1298 | struct kvm *kvm = vcpu->kvm; | |
1299 | int ret; | |
1300 | ||
1301 | if (kvm->arch.apic_access_page_done) | |
1302 | return 0; | |
1303 | ||
1304 | ret = x86_set_memory_region(kvm, | |
1305 | APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, | |
1306 | APIC_DEFAULT_PHYS_BASE, | |
1307 | PAGE_SIZE); | |
1308 | if (ret) | |
1309 | return ret; | |
1310 | ||
1311 | kvm->arch.apic_access_page_done = true; | |
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | static int avic_init_backing_page(struct kvm_vcpu *vcpu) | |
1316 | { | |
1317 | int ret; | |
1318 | u64 *entry, new_entry; | |
1319 | int id = vcpu->vcpu_id; | |
1320 | struct vcpu_svm *svm = to_svm(vcpu); | |
1321 | ||
1322 | ret = avic_init_access_page(vcpu); | |
1323 | if (ret) | |
1324 | return ret; | |
1325 | ||
1326 | if (id >= AVIC_MAX_PHYSICAL_ID_COUNT) | |
1327 | return -EINVAL; | |
1328 | ||
1329 | if (!svm->vcpu.arch.apic->regs) | |
1330 | return -EINVAL; | |
1331 | ||
1332 | svm->avic_backing_page = virt_to_page(svm->vcpu.arch.apic->regs); | |
1333 | ||
1334 | /* Setting AVIC backing page address in the phy APIC ID table */ | |
1335 | entry = avic_get_physical_id_entry(vcpu, id); | |
1336 | if (!entry) | |
1337 | return -EINVAL; | |
1338 | ||
1339 | new_entry = READ_ONCE(*entry); | |
1340 | new_entry = (page_to_phys(svm->avic_backing_page) & | |
1341 | AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK) | | |
1342 | AVIC_PHYSICAL_ID_ENTRY_VALID_MASK; | |
1343 | WRITE_ONCE(*entry, new_entry); | |
1344 | ||
1345 | svm->avic_physical_id_cache = entry; | |
1346 | ||
1347 | return 0; | |
1348 | } | |
1349 | ||
5ea11f2b SS |
1350 | static inline int avic_get_next_vm_id(void) |
1351 | { | |
1352 | int id; | |
1353 | ||
1354 | spin_lock(&avic_vm_id_lock); | |
1355 | ||
1356 | /* AVIC VM ID is one-based. */ | |
1357 | id = find_next_zero_bit(avic_vm_id_bitmap, AVIC_VM_ID_NR, 1); | |
1358 | if (id <= AVIC_VM_ID_MASK) | |
1359 | __set_bit(id, avic_vm_id_bitmap); | |
1360 | else | |
1361 | id = -EAGAIN; | |
1362 | ||
1363 | spin_unlock(&avic_vm_id_lock); | |
1364 | return id; | |
1365 | } | |
1366 | ||
1367 | static inline int avic_free_vm_id(int id) | |
1368 | { | |
1369 | if (id <= 0 || id > AVIC_VM_ID_MASK) | |
1370 | return -EINVAL; | |
1371 | ||
1372 | spin_lock(&avic_vm_id_lock); | |
1373 | __clear_bit(id, avic_vm_id_bitmap); | |
1374 | spin_unlock(&avic_vm_id_lock); | |
1375 | return 0; | |
1376 | } | |
1377 | ||
44a95dae SS |
1378 | static void avic_vm_destroy(struct kvm *kvm) |
1379 | { | |
5881f737 | 1380 | unsigned long flags; |
44a95dae SS |
1381 | struct kvm_arch *vm_data = &kvm->arch; |
1382 | ||
5ea11f2b SS |
1383 | avic_free_vm_id(vm_data->avic_vm_id); |
1384 | ||
44a95dae SS |
1385 | if (vm_data->avic_logical_id_table_page) |
1386 | __free_page(vm_data->avic_logical_id_table_page); | |
1387 | if (vm_data->avic_physical_id_table_page) | |
1388 | __free_page(vm_data->avic_physical_id_table_page); | |
5881f737 SS |
1389 | |
1390 | spin_lock_irqsave(&svm_vm_data_hash_lock, flags); | |
1391 | hash_del(&vm_data->hnode); | |
1392 | spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags); | |
44a95dae SS |
1393 | } |
1394 | ||
1395 | static int avic_vm_init(struct kvm *kvm) | |
1396 | { | |
5881f737 | 1397 | unsigned long flags; |
adad0d02 | 1398 | int vm_id, err = -ENOMEM; |
44a95dae SS |
1399 | struct kvm_arch *vm_data = &kvm->arch; |
1400 | struct page *p_page; | |
1401 | struct page *l_page; | |
1402 | ||
1403 | if (!avic) | |
1404 | return 0; | |
1405 | ||
adad0d02 CIK |
1406 | vm_id = avic_get_next_vm_id(); |
1407 | if (vm_id < 0) | |
1408 | return vm_id; | |
1409 | vm_data->avic_vm_id = (u32)vm_id; | |
5ea11f2b | 1410 | |
44a95dae SS |
1411 | /* Allocating physical APIC ID table (4KB) */ |
1412 | p_page = alloc_page(GFP_KERNEL); | |
1413 | if (!p_page) | |
1414 | goto free_avic; | |
1415 | ||
1416 | vm_data->avic_physical_id_table_page = p_page; | |
1417 | clear_page(page_address(p_page)); | |
1418 | ||
1419 | /* Allocating logical APIC ID table (4KB) */ | |
1420 | l_page = alloc_page(GFP_KERNEL); | |
1421 | if (!l_page) | |
1422 | goto free_avic; | |
1423 | ||
1424 | vm_data->avic_logical_id_table_page = l_page; | |
1425 | clear_page(page_address(l_page)); | |
1426 | ||
5881f737 SS |
1427 | spin_lock_irqsave(&svm_vm_data_hash_lock, flags); |
1428 | hash_add(svm_vm_data_hash, &vm_data->hnode, vm_data->avic_vm_id); | |
1429 | spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags); | |
1430 | ||
44a95dae SS |
1431 | return 0; |
1432 | ||
1433 | free_avic: | |
1434 | avic_vm_destroy(kvm); | |
1435 | return err; | |
6aa8b732 AK |
1436 | } |
1437 | ||
411b44ba SS |
1438 | static inline int |
1439 | avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r) | |
8221c137 | 1440 | { |
411b44ba SS |
1441 | int ret = 0; |
1442 | unsigned long flags; | |
1443 | struct amd_svm_iommu_ir *ir; | |
8221c137 SS |
1444 | struct vcpu_svm *svm = to_svm(vcpu); |
1445 | ||
411b44ba SS |
1446 | if (!kvm_arch_has_assigned_device(vcpu->kvm)) |
1447 | return 0; | |
8221c137 | 1448 | |
411b44ba SS |
1449 | /* |
1450 | * Here, we go through the per-vcpu ir_list to update all existing | |
1451 | * interrupt remapping table entry targeting this vcpu. | |
1452 | */ | |
1453 | spin_lock_irqsave(&svm->ir_list_lock, flags); | |
8221c137 | 1454 | |
411b44ba SS |
1455 | if (list_empty(&svm->ir_list)) |
1456 | goto out; | |
8221c137 | 1457 | |
411b44ba SS |
1458 | list_for_each_entry(ir, &svm->ir_list, node) { |
1459 | ret = amd_iommu_update_ga(cpu, r, ir->data); | |
1460 | if (ret) | |
1461 | break; | |
1462 | } | |
1463 | out: | |
1464 | spin_unlock_irqrestore(&svm->ir_list_lock, flags); | |
1465 | return ret; | |
8221c137 SS |
1466 | } |
1467 | ||
1468 | static void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
1469 | { | |
1470 | u64 entry; | |
1471 | /* ID = 0xff (broadcast), ID > 0xff (reserved) */ | |
7d669f50 | 1472 | int h_physical_id = kvm_cpu_get_apicid(cpu); |
8221c137 SS |
1473 | struct vcpu_svm *svm = to_svm(vcpu); |
1474 | ||
1475 | if (!kvm_vcpu_apicv_active(vcpu)) | |
1476 | return; | |
1477 | ||
1478 | if (WARN_ON(h_physical_id >= AVIC_MAX_PHYSICAL_ID_COUNT)) | |
1479 | return; | |
1480 | ||
1481 | entry = READ_ONCE(*(svm->avic_physical_id_cache)); | |
1482 | WARN_ON(entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK); | |
1483 | ||
1484 | entry &= ~AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK; | |
1485 | entry |= (h_physical_id & AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK); | |
1486 | ||
1487 | entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK; | |
1488 | if (svm->avic_is_running) | |
1489 | entry |= AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK; | |
1490 | ||
1491 | WRITE_ONCE(*(svm->avic_physical_id_cache), entry); | |
411b44ba SS |
1492 | avic_update_iommu_vcpu_affinity(vcpu, h_physical_id, |
1493 | svm->avic_is_running); | |
8221c137 SS |
1494 | } |
1495 | ||
1496 | static void avic_vcpu_put(struct kvm_vcpu *vcpu) | |
1497 | { | |
1498 | u64 entry; | |
1499 | struct vcpu_svm *svm = to_svm(vcpu); | |
1500 | ||
1501 | if (!kvm_vcpu_apicv_active(vcpu)) | |
1502 | return; | |
1503 | ||
1504 | entry = READ_ONCE(*(svm->avic_physical_id_cache)); | |
411b44ba SS |
1505 | if (entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK) |
1506 | avic_update_iommu_vcpu_affinity(vcpu, -1, 0); | |
1507 | ||
8221c137 SS |
1508 | entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK; |
1509 | WRITE_ONCE(*(svm->avic_physical_id_cache), entry); | |
6aa8b732 AK |
1510 | } |
1511 | ||
411b44ba SS |
1512 | /** |
1513 | * This function is called during VCPU halt/unhalt. | |
1514 | */ | |
1515 | static void avic_set_running(struct kvm_vcpu *vcpu, bool is_run) | |
1516 | { | |
1517 | struct vcpu_svm *svm = to_svm(vcpu); | |
1518 | ||
1519 | svm->avic_is_running = is_run; | |
1520 | if (is_run) | |
1521 | avic_vcpu_load(vcpu, vcpu->cpu); | |
1522 | else | |
1523 | avic_vcpu_put(vcpu); | |
1524 | } | |
1525 | ||
d28bc9dd | 1526 | static void svm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) |
04d2cc77 AK |
1527 | { |
1528 | struct vcpu_svm *svm = to_svm(vcpu); | |
66f7b72e JS |
1529 | u32 dummy; |
1530 | u32 eax = 1; | |
04d2cc77 | 1531 | |
d28bc9dd NA |
1532 | if (!init_event) { |
1533 | svm->vcpu.arch.apic_base = APIC_DEFAULT_PHYS_BASE | | |
1534 | MSR_IA32_APICBASE_ENABLE; | |
1535 | if (kvm_vcpu_is_reset_bsp(&svm->vcpu)) | |
1536 | svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP; | |
1537 | } | |
5690891b | 1538 | init_vmcb(svm); |
70433389 | 1539 | |
66f7b72e JS |
1540 | kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy); |
1541 | kvm_register_write(vcpu, VCPU_REGS_RDX, eax); | |
44a95dae SS |
1542 | |
1543 | if (kvm_vcpu_apicv_active(vcpu) && !init_event) | |
1544 | avic_update_vapic_bar(svm, APIC_DEFAULT_PHYS_BASE); | |
04d2cc77 AK |
1545 | } |
1546 | ||
fb3f0f51 | 1547 | static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 1548 | { |
a2fa3e9f | 1549 | struct vcpu_svm *svm; |
6aa8b732 | 1550 | struct page *page; |
f65c229c | 1551 | struct page *msrpm_pages; |
b286d5d8 | 1552 | struct page *hsave_page; |
3d6368ef | 1553 | struct page *nested_msrpm_pages; |
fb3f0f51 | 1554 | int err; |
6aa8b732 | 1555 | |
c16f862d | 1556 | svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
fb3f0f51 RR |
1557 | if (!svm) { |
1558 | err = -ENOMEM; | |
1559 | goto out; | |
1560 | } | |
1561 | ||
1562 | err = kvm_vcpu_init(&svm->vcpu, kvm, id); | |
1563 | if (err) | |
1564 | goto free_svm; | |
1565 | ||
b7af4043 | 1566 | err = -ENOMEM; |
6aa8b732 | 1567 | page = alloc_page(GFP_KERNEL); |
b7af4043 | 1568 | if (!page) |
fb3f0f51 | 1569 | goto uninit; |
6aa8b732 | 1570 | |
f65c229c JR |
1571 | msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); |
1572 | if (!msrpm_pages) | |
b7af4043 | 1573 | goto free_page1; |
3d6368ef AG |
1574 | |
1575 | nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); | |
1576 | if (!nested_msrpm_pages) | |
b7af4043 | 1577 | goto free_page2; |
f65c229c | 1578 | |
b286d5d8 AG |
1579 | hsave_page = alloc_page(GFP_KERNEL); |
1580 | if (!hsave_page) | |
b7af4043 TY |
1581 | goto free_page3; |
1582 | ||
44a95dae SS |
1583 | if (avic) { |
1584 | err = avic_init_backing_page(&svm->vcpu); | |
1585 | if (err) | |
1586 | goto free_page4; | |
411b44ba SS |
1587 | |
1588 | INIT_LIST_HEAD(&svm->ir_list); | |
1589 | spin_lock_init(&svm->ir_list_lock); | |
44a95dae SS |
1590 | } |
1591 | ||
8221c137 SS |
1592 | /* We initialize this flag to true to make sure that the is_running |
1593 | * bit would be set the first time the vcpu is loaded. | |
1594 | */ | |
1595 | svm->avic_is_running = true; | |
1596 | ||
e6aa9abd | 1597 | svm->nested.hsave = page_address(hsave_page); |
b286d5d8 | 1598 | |
b7af4043 TY |
1599 | svm->msrpm = page_address(msrpm_pages); |
1600 | svm_vcpu_init_msrpm(svm->msrpm); | |
1601 | ||
e6aa9abd | 1602 | svm->nested.msrpm = page_address(nested_msrpm_pages); |
323c3d80 | 1603 | svm_vcpu_init_msrpm(svm->nested.msrpm); |
3d6368ef | 1604 | |
a2fa3e9f GH |
1605 | svm->vmcb = page_address(page); |
1606 | clear_page(svm->vmcb); | |
1607 | svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT; | |
1608 | svm->asid_generation = 0; | |
5690891b | 1609 | init_vmcb(svm); |
6aa8b732 | 1610 | |
2b036c6b BO |
1611 | svm_init_osvw(&svm->vcpu); |
1612 | ||
fb3f0f51 | 1613 | return &svm->vcpu; |
36241b8c | 1614 | |
44a95dae SS |
1615 | free_page4: |
1616 | __free_page(hsave_page); | |
b7af4043 TY |
1617 | free_page3: |
1618 | __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER); | |
1619 | free_page2: | |
1620 | __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER); | |
1621 | free_page1: | |
1622 | __free_page(page); | |
fb3f0f51 RR |
1623 | uninit: |
1624 | kvm_vcpu_uninit(&svm->vcpu); | |
1625 | free_svm: | |
a4770347 | 1626 | kmem_cache_free(kvm_vcpu_cache, svm); |
fb3f0f51 RR |
1627 | out: |
1628 | return ERR_PTR(err); | |
6aa8b732 AK |
1629 | } |
1630 | ||
1631 | static void svm_free_vcpu(struct kvm_vcpu *vcpu) | |
1632 | { | |
a2fa3e9f GH |
1633 | struct vcpu_svm *svm = to_svm(vcpu); |
1634 | ||
fb3f0f51 | 1635 | __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT)); |
f65c229c | 1636 | __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER); |
e6aa9abd JR |
1637 | __free_page(virt_to_page(svm->nested.hsave)); |
1638 | __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER); | |
fb3f0f51 | 1639 | kvm_vcpu_uninit(vcpu); |
a4770347 | 1640 | kmem_cache_free(kvm_vcpu_cache, svm); |
6aa8b732 AK |
1641 | } |
1642 | ||
15ad7146 | 1643 | static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 1644 | { |
a2fa3e9f | 1645 | struct vcpu_svm *svm = to_svm(vcpu); |
15ad7146 | 1646 | int i; |
0cc5064d | 1647 | |
0cc5064d | 1648 | if (unlikely(cpu != vcpu->cpu)) { |
4b656b12 | 1649 | svm->asid_generation = 0; |
8d28fec4 | 1650 | mark_all_dirty(svm->vmcb); |
0cc5064d | 1651 | } |
94dfbdb3 | 1652 | |
82ca2d10 AK |
1653 | #ifdef CONFIG_X86_64 |
1654 | rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base); | |
1655 | #endif | |
dacccfdd AK |
1656 | savesegment(fs, svm->host.fs); |
1657 | savesegment(gs, svm->host.gs); | |
1658 | svm->host.ldt = kvm_read_ldt(); | |
1659 | ||
94dfbdb3 | 1660 | for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) |
a2fa3e9f | 1661 | rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]); |
fbc0db76 | 1662 | |
ad721883 HZ |
1663 | if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) { |
1664 | u64 tsc_ratio = vcpu->arch.tsc_scaling_ratio; | |
1665 | if (tsc_ratio != __this_cpu_read(current_tsc_ratio)) { | |
1666 | __this_cpu_write(current_tsc_ratio, tsc_ratio); | |
1667 | wrmsrl(MSR_AMD64_TSC_RATIO, tsc_ratio); | |
1668 | } | |
fbc0db76 | 1669 | } |
46896c73 PB |
1670 | /* This assumes that the kernel never uses MSR_TSC_AUX */ |
1671 | if (static_cpu_has(X86_FEATURE_RDTSCP)) | |
1672 | wrmsrl(MSR_TSC_AUX, svm->tsc_aux); | |
8221c137 SS |
1673 | |
1674 | avic_vcpu_load(vcpu, cpu); | |
6aa8b732 AK |
1675 | } |
1676 | ||
1677 | static void svm_vcpu_put(struct kvm_vcpu *vcpu) | |
1678 | { | |
a2fa3e9f | 1679 | struct vcpu_svm *svm = to_svm(vcpu); |
94dfbdb3 AL |
1680 | int i; |
1681 | ||
8221c137 SS |
1682 | avic_vcpu_put(vcpu); |
1683 | ||
e1beb1d3 | 1684 | ++vcpu->stat.host_state_reload; |
dacccfdd AK |
1685 | kvm_load_ldt(svm->host.ldt); |
1686 | #ifdef CONFIG_X86_64 | |
1687 | loadsegment(fs, svm->host.fs); | |
296f781a | 1688 | wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gsbase); |
893a5ab6 | 1689 | load_gs_index(svm->host.gs); |
dacccfdd | 1690 | #else |
831ca609 | 1691 | #ifdef CONFIG_X86_32_LAZY_GS |
dacccfdd | 1692 | loadsegment(gs, svm->host.gs); |
831ca609 | 1693 | #endif |
dacccfdd | 1694 | #endif |
94dfbdb3 | 1695 | for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) |
a2fa3e9f | 1696 | wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]); |
6aa8b732 AK |
1697 | } |
1698 | ||
8221c137 SS |
1699 | static void svm_vcpu_blocking(struct kvm_vcpu *vcpu) |
1700 | { | |
1701 | avic_set_running(vcpu, false); | |
1702 | } | |
1703 | ||
1704 | static void svm_vcpu_unblocking(struct kvm_vcpu *vcpu) | |
1705 | { | |
1706 | avic_set_running(vcpu, true); | |
1707 | } | |
1708 | ||
6aa8b732 AK |
1709 | static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu) |
1710 | { | |
a2fa3e9f | 1711 | return to_svm(vcpu)->vmcb->save.rflags; |
6aa8b732 AK |
1712 | } |
1713 | ||
1714 | static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
1715 | { | |
ae9fedc7 | 1716 | /* |
bb3541f1 | 1717 | * Any change of EFLAGS.VM is accompanied by a reload of SS |
ae9fedc7 PB |
1718 | * (caused by either a task switch or an inter-privilege IRET), |
1719 | * so we do not need to update the CPL here. | |
1720 | */ | |
a2fa3e9f | 1721 | to_svm(vcpu)->vmcb->save.rflags = rflags; |
6aa8b732 AK |
1722 | } |
1723 | ||
be94f6b7 HH |
1724 | static u32 svm_get_pkru(struct kvm_vcpu *vcpu) |
1725 | { | |
1726 | return 0; | |
1727 | } | |
1728 | ||
6de4f3ad AK |
1729 | static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) |
1730 | { | |
1731 | switch (reg) { | |
1732 | case VCPU_EXREG_PDPTR: | |
1733 | BUG_ON(!npt_enabled); | |
9f8fe504 | 1734 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
6de4f3ad AK |
1735 | break; |
1736 | default: | |
1737 | BUG(); | |
1738 | } | |
1739 | } | |
1740 | ||
f0b85051 AG |
1741 | static void svm_set_vintr(struct vcpu_svm *svm) |
1742 | { | |
8a05a1b8 | 1743 | set_intercept(svm, INTERCEPT_VINTR); |
f0b85051 AG |
1744 | } |
1745 | ||
1746 | static void svm_clear_vintr(struct vcpu_svm *svm) | |
1747 | { | |
8a05a1b8 | 1748 | clr_intercept(svm, INTERCEPT_VINTR); |
f0b85051 AG |
1749 | } |
1750 | ||
6aa8b732 AK |
1751 | static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg) |
1752 | { | |
a2fa3e9f | 1753 | struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save; |
6aa8b732 AK |
1754 | |
1755 | switch (seg) { | |
1756 | case VCPU_SREG_CS: return &save->cs; | |
1757 | case VCPU_SREG_DS: return &save->ds; | |
1758 | case VCPU_SREG_ES: return &save->es; | |
1759 | case VCPU_SREG_FS: return &save->fs; | |
1760 | case VCPU_SREG_GS: return &save->gs; | |
1761 | case VCPU_SREG_SS: return &save->ss; | |
1762 | case VCPU_SREG_TR: return &save->tr; | |
1763 | case VCPU_SREG_LDTR: return &save->ldtr; | |
1764 | } | |
1765 | BUG(); | |
8b6d44c7 | 1766 | return NULL; |
6aa8b732 AK |
1767 | } |
1768 | ||
1769 | static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
1770 | { | |
1771 | struct vmcb_seg *s = svm_seg(vcpu, seg); | |
1772 | ||
1773 | return s->base; | |
1774 | } | |
1775 | ||
1776 | static void svm_get_segment(struct kvm_vcpu *vcpu, | |
1777 | struct kvm_segment *var, int seg) | |
1778 | { | |
1779 | struct vmcb_seg *s = svm_seg(vcpu, seg); | |
1780 | ||
1781 | var->base = s->base; | |
1782 | var->limit = s->limit; | |
1783 | var->selector = s->selector; | |
1784 | var->type = s->attrib & SVM_SELECTOR_TYPE_MASK; | |
1785 | var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1; | |
1786 | var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3; | |
1787 | var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1; | |
1788 | var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1; | |
1789 | var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1; | |
1790 | var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1; | |
80112c89 JM |
1791 | |
1792 | /* | |
1793 | * AMD CPUs circa 2014 track the G bit for all segments except CS. | |
1794 | * However, the SVM spec states that the G bit is not observed by the | |
1795 | * CPU, and some VMware virtual CPUs drop the G bit for all segments. | |
1796 | * So let's synthesize a legal G bit for all segments, this helps | |
1797 | * running KVM nested. It also helps cross-vendor migration, because | |
1798 | * Intel's vmentry has a check on the 'G' bit. | |
1799 | */ | |
1800 | var->g = s->limit > 0xfffff; | |
25022acc | 1801 | |
e0231715 JR |
1802 | /* |
1803 | * AMD's VMCB does not have an explicit unusable field, so emulate it | |
19bca6ab AP |
1804 | * for cross vendor migration purposes by "not present" |
1805 | */ | |
1806 | var->unusable = !var->present || (var->type == 0); | |
1807 | ||
1fbdc7a5 | 1808 | switch (seg) { |
1fbdc7a5 AP |
1809 | case VCPU_SREG_TR: |
1810 | /* | |
1811 | * Work around a bug where the busy flag in the tr selector | |
1812 | * isn't exposed | |
1813 | */ | |
c0d09828 | 1814 | var->type |= 0x2; |
1fbdc7a5 AP |
1815 | break; |
1816 | case VCPU_SREG_DS: | |
1817 | case VCPU_SREG_ES: | |
1818 | case VCPU_SREG_FS: | |
1819 | case VCPU_SREG_GS: | |
1820 | /* | |
1821 | * The accessed bit must always be set in the segment | |
1822 | * descriptor cache, although it can be cleared in the | |
1823 | * descriptor, the cached bit always remains at 1. Since | |
1824 | * Intel has a check on this, set it here to support | |
1825 | * cross-vendor migration. | |
1826 | */ | |
1827 | if (!var->unusable) | |
1828 | var->type |= 0x1; | |
1829 | break; | |
b586eb02 | 1830 | case VCPU_SREG_SS: |
e0231715 JR |
1831 | /* |
1832 | * On AMD CPUs sometimes the DB bit in the segment | |
b586eb02 AP |
1833 | * descriptor is left as 1, although the whole segment has |
1834 | * been made unusable. Clear it here to pass an Intel VMX | |
1835 | * entry check when cross vendor migrating. | |
1836 | */ | |
1837 | if (var->unusable) | |
1838 | var->db = 0; | |
33b458d2 | 1839 | var->dpl = to_svm(vcpu)->vmcb->save.cpl; |
b586eb02 | 1840 | break; |
1fbdc7a5 | 1841 | } |
6aa8b732 AK |
1842 | } |
1843 | ||
2e4d2653 IE |
1844 | static int svm_get_cpl(struct kvm_vcpu *vcpu) |
1845 | { | |
1846 | struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save; | |
1847 | ||
1848 | return save->cpl; | |
1849 | } | |
1850 | ||
89a27f4d | 1851 | static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1852 | { |
a2fa3e9f GH |
1853 | struct vcpu_svm *svm = to_svm(vcpu); |
1854 | ||
89a27f4d GN |
1855 | dt->size = svm->vmcb->save.idtr.limit; |
1856 | dt->address = svm->vmcb->save.idtr.base; | |
6aa8b732 AK |
1857 | } |
1858 | ||
89a27f4d | 1859 | static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1860 | { |
a2fa3e9f GH |
1861 | struct vcpu_svm *svm = to_svm(vcpu); |
1862 | ||
89a27f4d GN |
1863 | svm->vmcb->save.idtr.limit = dt->size; |
1864 | svm->vmcb->save.idtr.base = dt->address ; | |
17a703cb | 1865 | mark_dirty(svm->vmcb, VMCB_DT); |
6aa8b732 AK |
1866 | } |
1867 | ||
89a27f4d | 1868 | static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1869 | { |
a2fa3e9f GH |
1870 | struct vcpu_svm *svm = to_svm(vcpu); |
1871 | ||
89a27f4d GN |
1872 | dt->size = svm->vmcb->save.gdtr.limit; |
1873 | dt->address = svm->vmcb->save.gdtr.base; | |
6aa8b732 AK |
1874 | } |
1875 | ||
89a27f4d | 1876 | static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1877 | { |
a2fa3e9f GH |
1878 | struct vcpu_svm *svm = to_svm(vcpu); |
1879 | ||
89a27f4d GN |
1880 | svm->vmcb->save.gdtr.limit = dt->size; |
1881 | svm->vmcb->save.gdtr.base = dt->address ; | |
17a703cb | 1882 | mark_dirty(svm->vmcb, VMCB_DT); |
6aa8b732 AK |
1883 | } |
1884 | ||
e8467fda AK |
1885 | static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) |
1886 | { | |
1887 | } | |
1888 | ||
aff48baa AK |
1889 | static void svm_decache_cr3(struct kvm_vcpu *vcpu) |
1890 | { | |
1891 | } | |
1892 | ||
25c4c276 | 1893 | static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 AK |
1894 | { |
1895 | } | |
1896 | ||
d225157b AK |
1897 | static void update_cr0_intercept(struct vcpu_svm *svm) |
1898 | { | |
1899 | ulong gcr0 = svm->vcpu.arch.cr0; | |
1900 | u64 *hcr0 = &svm->vmcb->save.cr0; | |
1901 | ||
1902 | if (!svm->vcpu.fpu_active) | |
1903 | *hcr0 |= SVM_CR0_SELECTIVE_MASK; | |
1904 | else | |
1905 | *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK) | |
1906 | | (gcr0 & SVM_CR0_SELECTIVE_MASK); | |
1907 | ||
dcca1a65 | 1908 | mark_dirty(svm->vmcb, VMCB_CR); |
d225157b AK |
1909 | |
1910 | if (gcr0 == *hcr0 && svm->vcpu.fpu_active) { | |
4ee546b4 RJ |
1911 | clr_cr_intercept(svm, INTERCEPT_CR0_READ); |
1912 | clr_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
d225157b | 1913 | } else { |
4ee546b4 RJ |
1914 | set_cr_intercept(svm, INTERCEPT_CR0_READ); |
1915 | set_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
d225157b AK |
1916 | } |
1917 | } | |
1918 | ||
6aa8b732 AK |
1919 | static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
1920 | { | |
a2fa3e9f GH |
1921 | struct vcpu_svm *svm = to_svm(vcpu); |
1922 | ||
05b3e0c2 | 1923 | #ifdef CONFIG_X86_64 |
f6801dff | 1924 | if (vcpu->arch.efer & EFER_LME) { |
707d92fa | 1925 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { |
f6801dff | 1926 | vcpu->arch.efer |= EFER_LMA; |
2b5203ee | 1927 | svm->vmcb->save.efer |= EFER_LMA | EFER_LME; |
6aa8b732 AK |
1928 | } |
1929 | ||
d77c26fc | 1930 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) { |
f6801dff | 1931 | vcpu->arch.efer &= ~EFER_LMA; |
2b5203ee | 1932 | svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME); |
6aa8b732 AK |
1933 | } |
1934 | } | |
1935 | #endif | |
ad312c7c | 1936 | vcpu->arch.cr0 = cr0; |
888f9f3e AK |
1937 | |
1938 | if (!npt_enabled) | |
1939 | cr0 |= X86_CR0_PG | X86_CR0_WP; | |
02daab21 AK |
1940 | |
1941 | if (!vcpu->fpu_active) | |
334df50a | 1942 | cr0 |= X86_CR0_TS; |
bcf166a9 PB |
1943 | /* |
1944 | * re-enable caching here because the QEMU bios | |
1945 | * does not do it - this results in some delay at | |
1946 | * reboot | |
1947 | */ | |
1948 | if (kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) | |
1949 | cr0 &= ~(X86_CR0_CD | X86_CR0_NW); | |
a2fa3e9f | 1950 | svm->vmcb->save.cr0 = cr0; |
dcca1a65 | 1951 | mark_dirty(svm->vmcb, VMCB_CR); |
d225157b | 1952 | update_cr0_intercept(svm); |
6aa8b732 AK |
1953 | } |
1954 | ||
5e1746d6 | 1955 | static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
6aa8b732 | 1956 | { |
1e02ce4c | 1957 | unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE; |
e5eab0ce JR |
1958 | unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4; |
1959 | ||
5e1746d6 NHE |
1960 | if (cr4 & X86_CR4_VMXE) |
1961 | return 1; | |
1962 | ||
e5eab0ce | 1963 | if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE)) |
f40f6a45 | 1964 | svm_flush_tlb(vcpu); |
6394b649 | 1965 | |
ec077263 JR |
1966 | vcpu->arch.cr4 = cr4; |
1967 | if (!npt_enabled) | |
1968 | cr4 |= X86_CR4_PAE; | |
6394b649 | 1969 | cr4 |= host_cr4_mce; |
ec077263 | 1970 | to_svm(vcpu)->vmcb->save.cr4 = cr4; |
dcca1a65 | 1971 | mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR); |
5e1746d6 | 1972 | return 0; |
6aa8b732 AK |
1973 | } |
1974 | ||
1975 | static void svm_set_segment(struct kvm_vcpu *vcpu, | |
1976 | struct kvm_segment *var, int seg) | |
1977 | { | |
a2fa3e9f | 1978 | struct vcpu_svm *svm = to_svm(vcpu); |
6aa8b732 AK |
1979 | struct vmcb_seg *s = svm_seg(vcpu, seg); |
1980 | ||
1981 | s->base = var->base; | |
1982 | s->limit = var->limit; | |
1983 | s->selector = var->selector; | |
1984 | if (var->unusable) | |
1985 | s->attrib = 0; | |
1986 | else { | |
1987 | s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK); | |
1988 | s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT; | |
1989 | s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT; | |
1990 | s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT; | |
1991 | s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT; | |
1992 | s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT; | |
1993 | s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT; | |
1994 | s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT; | |
1995 | } | |
ae9fedc7 PB |
1996 | |
1997 | /* | |
1998 | * This is always accurate, except if SYSRET returned to a segment | |
1999 | * with SS.DPL != 3. Intel does not have this quirk, and always | |
2000 | * forces SS.DPL to 3 on sysret, so we ignore that case; fixing it | |
2001 | * would entail passing the CPL to userspace and back. | |
2002 | */ | |
2003 | if (seg == VCPU_SREG_SS) | |
2004 | svm->vmcb->save.cpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3; | |
6aa8b732 | 2005 | |
060d0c9a | 2006 | mark_dirty(svm->vmcb, VMCB_SEG); |
6aa8b732 AK |
2007 | } |
2008 | ||
cbdb967a | 2009 | static void update_bp_intercept(struct kvm_vcpu *vcpu) |
6aa8b732 | 2010 | { |
d0bfb940 JK |
2011 | struct vcpu_svm *svm = to_svm(vcpu); |
2012 | ||
18c918c5 | 2013 | clr_exception_intercept(svm, BP_VECTOR); |
44c11430 | 2014 | |
d0bfb940 | 2015 | if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) { |
d0bfb940 | 2016 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) |
18c918c5 | 2017 | set_exception_intercept(svm, BP_VECTOR); |
d0bfb940 JK |
2018 | } else |
2019 | vcpu->guest_debug = 0; | |
44c11430 GN |
2020 | } |
2021 | ||
0fe1e009 | 2022 | static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd) |
6aa8b732 | 2023 | { |
0fe1e009 TH |
2024 | if (sd->next_asid > sd->max_asid) { |
2025 | ++sd->asid_generation; | |
2026 | sd->next_asid = 1; | |
a2fa3e9f | 2027 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID; |
6aa8b732 AK |
2028 | } |
2029 | ||
0fe1e009 TH |
2030 | svm->asid_generation = sd->asid_generation; |
2031 | svm->vmcb->control.asid = sd->next_asid++; | |
d48086d1 JR |
2032 | |
2033 | mark_dirty(svm->vmcb, VMCB_ASID); | |
6aa8b732 AK |
2034 | } |
2035 | ||
73aaf249 JK |
2036 | static u64 svm_get_dr6(struct kvm_vcpu *vcpu) |
2037 | { | |
2038 | return to_svm(vcpu)->vmcb->save.dr6; | |
2039 | } | |
2040 | ||
2041 | static void svm_set_dr6(struct kvm_vcpu *vcpu, unsigned long value) | |
2042 | { | |
2043 | struct vcpu_svm *svm = to_svm(vcpu); | |
2044 | ||
2045 | svm->vmcb->save.dr6 = value; | |
2046 | mark_dirty(svm->vmcb, VMCB_DR); | |
2047 | } | |
2048 | ||
facb0139 PB |
2049 | static void svm_sync_dirty_debug_regs(struct kvm_vcpu *vcpu) |
2050 | { | |
2051 | struct vcpu_svm *svm = to_svm(vcpu); | |
2052 | ||
2053 | get_debugreg(vcpu->arch.db[0], 0); | |
2054 | get_debugreg(vcpu->arch.db[1], 1); | |
2055 | get_debugreg(vcpu->arch.db[2], 2); | |
2056 | get_debugreg(vcpu->arch.db[3], 3); | |
2057 | vcpu->arch.dr6 = svm_get_dr6(vcpu); | |
2058 | vcpu->arch.dr7 = svm->vmcb->save.dr7; | |
2059 | ||
2060 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_WONT_EXIT; | |
2061 | set_dr_intercepts(svm); | |
2062 | } | |
2063 | ||
020df079 | 2064 | static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value) |
6aa8b732 | 2065 | { |
42dbaa5a | 2066 | struct vcpu_svm *svm = to_svm(vcpu); |
42dbaa5a | 2067 | |
020df079 | 2068 | svm->vmcb->save.dr7 = value; |
72214b96 | 2069 | mark_dirty(svm->vmcb, VMCB_DR); |
6aa8b732 AK |
2070 | } |
2071 | ||
851ba692 | 2072 | static int pf_interception(struct vcpu_svm *svm) |
6aa8b732 | 2073 | { |
631bc487 | 2074 | u64 fault_address = svm->vmcb->control.exit_info_2; |
14727754 | 2075 | u64 error_code; |
631bc487 | 2076 | int r = 1; |
6aa8b732 | 2077 | |
631bc487 GN |
2078 | switch (svm->apf_reason) { |
2079 | default: | |
2080 | error_code = svm->vmcb->control.exit_info_1; | |
af9ca2d7 | 2081 | |
631bc487 GN |
2082 | trace_kvm_page_fault(fault_address, error_code); |
2083 | if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu)) | |
2084 | kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address); | |
dc25e89e AP |
2085 | r = kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code, |
2086 | svm->vmcb->control.insn_bytes, | |
2087 | svm->vmcb->control.insn_len); | |
631bc487 GN |
2088 | break; |
2089 | case KVM_PV_REASON_PAGE_NOT_PRESENT: | |
2090 | svm->apf_reason = 0; | |
2091 | local_irq_disable(); | |
2092 | kvm_async_pf_task_wait(fault_address); | |
2093 | local_irq_enable(); | |
2094 | break; | |
2095 | case KVM_PV_REASON_PAGE_READY: | |
2096 | svm->apf_reason = 0; | |
2097 | local_irq_disable(); | |
2098 | kvm_async_pf_task_wake(fault_address); | |
2099 | local_irq_enable(); | |
2100 | break; | |
2101 | } | |
2102 | return r; | |
6aa8b732 AK |
2103 | } |
2104 | ||
851ba692 | 2105 | static int db_interception(struct vcpu_svm *svm) |
d0bfb940 | 2106 | { |
851ba692 AK |
2107 | struct kvm_run *kvm_run = svm->vcpu.run; |
2108 | ||
d0bfb940 | 2109 | if (!(svm->vcpu.guest_debug & |
44c11430 | 2110 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) && |
6be7d306 | 2111 | !svm->nmi_singlestep) { |
d0bfb940 JK |
2112 | kvm_queue_exception(&svm->vcpu, DB_VECTOR); |
2113 | return 1; | |
2114 | } | |
44c11430 | 2115 | |
6be7d306 JK |
2116 | if (svm->nmi_singlestep) { |
2117 | svm->nmi_singlestep = false; | |
44c11430 GN |
2118 | if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP)) |
2119 | svm->vmcb->save.rflags &= | |
2120 | ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
44c11430 GN |
2121 | } |
2122 | ||
2123 | if (svm->vcpu.guest_debug & | |
e0231715 | 2124 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) { |
44c11430 GN |
2125 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
2126 | kvm_run->debug.arch.pc = | |
2127 | svm->vmcb->save.cs.base + svm->vmcb->save.rip; | |
2128 | kvm_run->debug.arch.exception = DB_VECTOR; | |
2129 | return 0; | |
2130 | } | |
2131 | ||
2132 | return 1; | |
d0bfb940 JK |
2133 | } |
2134 | ||
851ba692 | 2135 | static int bp_interception(struct vcpu_svm *svm) |
d0bfb940 | 2136 | { |
851ba692 AK |
2137 | struct kvm_run *kvm_run = svm->vcpu.run; |
2138 | ||
d0bfb940 JK |
2139 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
2140 | kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip; | |
2141 | kvm_run->debug.arch.exception = BP_VECTOR; | |
2142 | return 0; | |
2143 | } | |
2144 | ||
851ba692 | 2145 | static int ud_interception(struct vcpu_svm *svm) |
7aa81cc0 AL |
2146 | { |
2147 | int er; | |
2148 | ||
51d8b661 | 2149 | er = emulate_instruction(&svm->vcpu, EMULTYPE_TRAP_UD); |
7aa81cc0 | 2150 | if (er != EMULATE_DONE) |
7ee5d940 | 2151 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); |
7aa81cc0 AL |
2152 | return 1; |
2153 | } | |
2154 | ||
54a20552 EN |
2155 | static int ac_interception(struct vcpu_svm *svm) |
2156 | { | |
2157 | kvm_queue_exception_e(&svm->vcpu, AC_VECTOR, 0); | |
2158 | return 1; | |
2159 | } | |
2160 | ||
6b52d186 | 2161 | static void svm_fpu_activate(struct kvm_vcpu *vcpu) |
7807fa6c | 2162 | { |
6b52d186 | 2163 | struct vcpu_svm *svm = to_svm(vcpu); |
66a562f7 | 2164 | |
18c918c5 | 2165 | clr_exception_intercept(svm, NM_VECTOR); |
66a562f7 | 2166 | |
e756fc62 | 2167 | svm->vcpu.fpu_active = 1; |
d225157b | 2168 | update_cr0_intercept(svm); |
6b52d186 | 2169 | } |
a2fa3e9f | 2170 | |
6b52d186 AK |
2171 | static int nm_interception(struct vcpu_svm *svm) |
2172 | { | |
2173 | svm_fpu_activate(&svm->vcpu); | |
a2fa3e9f | 2174 | return 1; |
7807fa6c AL |
2175 | } |
2176 | ||
67ec6607 JR |
2177 | static bool is_erratum_383(void) |
2178 | { | |
2179 | int err, i; | |
2180 | u64 value; | |
2181 | ||
2182 | if (!erratum_383_found) | |
2183 | return false; | |
2184 | ||
2185 | value = native_read_msr_safe(MSR_IA32_MC0_STATUS, &err); | |
2186 | if (err) | |
2187 | return false; | |
2188 | ||
2189 | /* Bit 62 may or may not be set for this mce */ | |
2190 | value &= ~(1ULL << 62); | |
2191 | ||
2192 | if (value != 0xb600000000010015ULL) | |
2193 | return false; | |
2194 | ||
2195 | /* Clear MCi_STATUS registers */ | |
2196 | for (i = 0; i < 6; ++i) | |
2197 | native_write_msr_safe(MSR_IA32_MCx_STATUS(i), 0, 0); | |
2198 | ||
2199 | value = native_read_msr_safe(MSR_IA32_MCG_STATUS, &err); | |
2200 | if (!err) { | |
2201 | u32 low, high; | |
2202 | ||
2203 | value &= ~(1ULL << 2); | |
2204 | low = lower_32_bits(value); | |
2205 | high = upper_32_bits(value); | |
2206 | ||
2207 | native_write_msr_safe(MSR_IA32_MCG_STATUS, low, high); | |
2208 | } | |
2209 | ||
2210 | /* Flush tlb to evict multi-match entries */ | |
2211 | __flush_tlb_all(); | |
2212 | ||
2213 | return true; | |
2214 | } | |
2215 | ||
fe5913e4 | 2216 | static void svm_handle_mce(struct vcpu_svm *svm) |
53371b50 | 2217 | { |
67ec6607 JR |
2218 | if (is_erratum_383()) { |
2219 | /* | |
2220 | * Erratum 383 triggered. Guest state is corrupt so kill the | |
2221 | * guest. | |
2222 | */ | |
2223 | pr_err("KVM: Guest triggered AMD Erratum 383\n"); | |
2224 | ||
a8eeb04a | 2225 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu); |
67ec6607 JR |
2226 | |
2227 | return; | |
2228 | } | |
2229 | ||
53371b50 JR |
2230 | /* |
2231 | * On an #MC intercept the MCE handler is not called automatically in | |
2232 | * the host. So do it by hand here. | |
2233 | */ | |
2234 | asm volatile ( | |
2235 | "int $0x12\n"); | |
2236 | /* not sure if we ever come back to this point */ | |
2237 | ||
fe5913e4 JR |
2238 | return; |
2239 | } | |
2240 | ||
2241 | static int mc_interception(struct vcpu_svm *svm) | |
2242 | { | |
53371b50 JR |
2243 | return 1; |
2244 | } | |
2245 | ||
851ba692 | 2246 | static int shutdown_interception(struct vcpu_svm *svm) |
46fe4ddd | 2247 | { |
851ba692 AK |
2248 | struct kvm_run *kvm_run = svm->vcpu.run; |
2249 | ||
46fe4ddd JR |
2250 | /* |
2251 | * VMCB is undefined after a SHUTDOWN intercept | |
2252 | * so reinitialize it. | |
2253 | */ | |
a2fa3e9f | 2254 | clear_page(svm->vmcb); |
5690891b | 2255 | init_vmcb(svm); |
46fe4ddd JR |
2256 | |
2257 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
2258 | return 0; | |
2259 | } | |
2260 | ||
851ba692 | 2261 | static int io_interception(struct vcpu_svm *svm) |
6aa8b732 | 2262 | { |
cf8f70bf | 2263 | struct kvm_vcpu *vcpu = &svm->vcpu; |
d77c26fc | 2264 | u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */ |
34c33d16 | 2265 | int size, in, string; |
039576c0 | 2266 | unsigned port; |
6aa8b732 | 2267 | |
e756fc62 | 2268 | ++svm->vcpu.stat.io_exits; |
e70669ab | 2269 | string = (io_info & SVM_IOIO_STR_MASK) != 0; |
039576c0 | 2270 | in = (io_info & SVM_IOIO_TYPE_MASK) != 0; |
8370c3d0 | 2271 | if (string) |
51d8b661 | 2272 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
cf8f70bf | 2273 | |
039576c0 AK |
2274 | port = io_info >> 16; |
2275 | size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT; | |
cf8f70bf | 2276 | svm->next_rip = svm->vmcb->control.exit_info_2; |
e93f36bc | 2277 | skip_emulated_instruction(&svm->vcpu); |
cf8f70bf | 2278 | |
8370c3d0 TL |
2279 | return in ? kvm_fast_pio_in(vcpu, size, port) |
2280 | : kvm_fast_pio_out(vcpu, size, port); | |
6aa8b732 AK |
2281 | } |
2282 | ||
851ba692 | 2283 | static int nmi_interception(struct vcpu_svm *svm) |
c47f098d JR |
2284 | { |
2285 | return 1; | |
2286 | } | |
2287 | ||
851ba692 | 2288 | static int intr_interception(struct vcpu_svm *svm) |
a0698055 JR |
2289 | { |
2290 | ++svm->vcpu.stat.irq_exits; | |
2291 | return 1; | |
2292 | } | |
2293 | ||
851ba692 | 2294 | static int nop_on_interception(struct vcpu_svm *svm) |
6aa8b732 AK |
2295 | { |
2296 | return 1; | |
2297 | } | |
2298 | ||
851ba692 | 2299 | static int halt_interception(struct vcpu_svm *svm) |
6aa8b732 | 2300 | { |
5fdbf976 | 2301 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 1; |
e756fc62 | 2302 | return kvm_emulate_halt(&svm->vcpu); |
6aa8b732 AK |
2303 | } |
2304 | ||
851ba692 | 2305 | static int vmmcall_interception(struct vcpu_svm *svm) |
02e235bc | 2306 | { |
5fdbf976 | 2307 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; |
0d9c055e | 2308 | return kvm_emulate_hypercall(&svm->vcpu); |
02e235bc AK |
2309 | } |
2310 | ||
5bd2edc3 JR |
2311 | static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu) |
2312 | { | |
2313 | struct vcpu_svm *svm = to_svm(vcpu); | |
2314 | ||
2315 | return svm->nested.nested_cr3; | |
2316 | } | |
2317 | ||
e4e517b4 AK |
2318 | static u64 nested_svm_get_tdp_pdptr(struct kvm_vcpu *vcpu, int index) |
2319 | { | |
2320 | struct vcpu_svm *svm = to_svm(vcpu); | |
2321 | u64 cr3 = svm->nested.nested_cr3; | |
2322 | u64 pdpte; | |
2323 | int ret; | |
2324 | ||
54bf36aa PB |
2325 | ret = kvm_vcpu_read_guest_page(vcpu, gpa_to_gfn(cr3), &pdpte, |
2326 | offset_in_page(cr3) + index * 8, 8); | |
e4e517b4 AK |
2327 | if (ret) |
2328 | return 0; | |
2329 | return pdpte; | |
2330 | } | |
2331 | ||
5bd2edc3 JR |
2332 | static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu, |
2333 | unsigned long root) | |
2334 | { | |
2335 | struct vcpu_svm *svm = to_svm(vcpu); | |
2336 | ||
2337 | svm->vmcb->control.nested_cr3 = root; | |
b2747166 | 2338 | mark_dirty(svm->vmcb, VMCB_NPT); |
f40f6a45 | 2339 | svm_flush_tlb(vcpu); |
5bd2edc3 JR |
2340 | } |
2341 | ||
6389ee94 AK |
2342 | static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu, |
2343 | struct x86_exception *fault) | |
5bd2edc3 JR |
2344 | { |
2345 | struct vcpu_svm *svm = to_svm(vcpu); | |
2346 | ||
5e352519 PB |
2347 | if (svm->vmcb->control.exit_code != SVM_EXIT_NPF) { |
2348 | /* | |
2349 | * TODO: track the cause of the nested page fault, and | |
2350 | * correctly fill in the high bits of exit_info_1. | |
2351 | */ | |
2352 | svm->vmcb->control.exit_code = SVM_EXIT_NPF; | |
2353 | svm->vmcb->control.exit_code_hi = 0; | |
2354 | svm->vmcb->control.exit_info_1 = (1ULL << 32); | |
2355 | svm->vmcb->control.exit_info_2 = fault->address; | |
2356 | } | |
2357 | ||
2358 | svm->vmcb->control.exit_info_1 &= ~0xffffffffULL; | |
2359 | svm->vmcb->control.exit_info_1 |= fault->error_code; | |
2360 | ||
2361 | /* | |
2362 | * The present bit is always zero for page structure faults on real | |
2363 | * hardware. | |
2364 | */ | |
2365 | if (svm->vmcb->control.exit_info_1 & (2ULL << 32)) | |
2366 | svm->vmcb->control.exit_info_1 &= ~1; | |
5bd2edc3 JR |
2367 | |
2368 | nested_svm_vmexit(svm); | |
2369 | } | |
2370 | ||
8a3c1a33 | 2371 | static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu) |
4b16184c | 2372 | { |
ad896af0 PB |
2373 | WARN_ON(mmu_is_nested(vcpu)); |
2374 | kvm_init_shadow_mmu(vcpu); | |
4b16184c JR |
2375 | vcpu->arch.mmu.set_cr3 = nested_svm_set_tdp_cr3; |
2376 | vcpu->arch.mmu.get_cr3 = nested_svm_get_tdp_cr3; | |
e4e517b4 | 2377 | vcpu->arch.mmu.get_pdptr = nested_svm_get_tdp_pdptr; |
4b16184c JR |
2378 | vcpu->arch.mmu.inject_page_fault = nested_svm_inject_npf_exit; |
2379 | vcpu->arch.mmu.shadow_root_level = get_npt_level(); | |
c258b62b | 2380 | reset_shadow_zero_bits_mask(vcpu, &vcpu->arch.mmu); |
4b16184c | 2381 | vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu; |
4b16184c JR |
2382 | } |
2383 | ||
2384 | static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu) | |
2385 | { | |
2386 | vcpu->arch.walk_mmu = &vcpu->arch.mmu; | |
2387 | } | |
2388 | ||
c0725420 AG |
2389 | static int nested_svm_check_permissions(struct vcpu_svm *svm) |
2390 | { | |
f6801dff | 2391 | if (!(svm->vcpu.arch.efer & EFER_SVME) |
c0725420 AG |
2392 | || !is_paging(&svm->vcpu)) { |
2393 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
2394 | return 1; | |
2395 | } | |
2396 | ||
2397 | if (svm->vmcb->save.cpl) { | |
2398 | kvm_inject_gp(&svm->vcpu, 0); | |
2399 | return 1; | |
2400 | } | |
2401 | ||
2402 | return 0; | |
2403 | } | |
2404 | ||
cf74a78b AG |
2405 | static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, |
2406 | bool has_error_code, u32 error_code) | |
2407 | { | |
b8e88bc8 JR |
2408 | int vmexit; |
2409 | ||
2030753d | 2410 | if (!is_guest_mode(&svm->vcpu)) |
0295ad7d | 2411 | return 0; |
cf74a78b | 2412 | |
0295ad7d JR |
2413 | svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr; |
2414 | svm->vmcb->control.exit_code_hi = 0; | |
2415 | svm->vmcb->control.exit_info_1 = error_code; | |
2416 | svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2; | |
2417 | ||
b8e88bc8 JR |
2418 | vmexit = nested_svm_intercept(svm); |
2419 | if (vmexit == NESTED_EXIT_DONE) | |
2420 | svm->nested.exit_required = true; | |
2421 | ||
2422 | return vmexit; | |
cf74a78b AG |
2423 | } |
2424 | ||
8fe54654 JR |
2425 | /* This function returns true if it is save to enable the irq window */ |
2426 | static inline bool nested_svm_intr(struct vcpu_svm *svm) | |
cf74a78b | 2427 | { |
2030753d | 2428 | if (!is_guest_mode(&svm->vcpu)) |
8fe54654 | 2429 | return true; |
cf74a78b | 2430 | |
26666957 | 2431 | if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK)) |
8fe54654 | 2432 | return true; |
cf74a78b | 2433 | |
26666957 | 2434 | if (!(svm->vcpu.arch.hflags & HF_HIF_MASK)) |
8fe54654 | 2435 | return false; |
cf74a78b | 2436 | |
a0a07cd2 GN |
2437 | /* |
2438 | * if vmexit was already requested (by intercepted exception | |
2439 | * for instance) do not overwrite it with "external interrupt" | |
2440 | * vmexit. | |
2441 | */ | |
2442 | if (svm->nested.exit_required) | |
2443 | return false; | |
2444 | ||
197717d5 JR |
2445 | svm->vmcb->control.exit_code = SVM_EXIT_INTR; |
2446 | svm->vmcb->control.exit_info_1 = 0; | |
2447 | svm->vmcb->control.exit_info_2 = 0; | |
26666957 | 2448 | |
cd3ff653 JR |
2449 | if (svm->nested.intercept & 1ULL) { |
2450 | /* | |
2451 | * The #vmexit can't be emulated here directly because this | |
c5ec2e56 | 2452 | * code path runs with irqs and preemption disabled. A |
cd3ff653 JR |
2453 | * #vmexit emulation might sleep. Only signal request for |
2454 | * the #vmexit here. | |
2455 | */ | |
2456 | svm->nested.exit_required = true; | |
236649de | 2457 | trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip); |
8fe54654 | 2458 | return false; |
cf74a78b AG |
2459 | } |
2460 | ||
8fe54654 | 2461 | return true; |
cf74a78b AG |
2462 | } |
2463 | ||
887f500c JR |
2464 | /* This function returns true if it is save to enable the nmi window */ |
2465 | static inline bool nested_svm_nmi(struct vcpu_svm *svm) | |
2466 | { | |
2030753d | 2467 | if (!is_guest_mode(&svm->vcpu)) |
887f500c JR |
2468 | return true; |
2469 | ||
2470 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI))) | |
2471 | return true; | |
2472 | ||
2473 | svm->vmcb->control.exit_code = SVM_EXIT_NMI; | |
2474 | svm->nested.exit_required = true; | |
2475 | ||
2476 | return false; | |
cf74a78b AG |
2477 | } |
2478 | ||
7597f129 | 2479 | static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page) |
34f80cfa JR |
2480 | { |
2481 | struct page *page; | |
2482 | ||
6c3bd3d7 JR |
2483 | might_sleep(); |
2484 | ||
54bf36aa | 2485 | page = kvm_vcpu_gfn_to_page(&svm->vcpu, gpa >> PAGE_SHIFT); |
34f80cfa JR |
2486 | if (is_error_page(page)) |
2487 | goto error; | |
2488 | ||
7597f129 JR |
2489 | *_page = page; |
2490 | ||
2491 | return kmap(page); | |
34f80cfa JR |
2492 | |
2493 | error: | |
34f80cfa JR |
2494 | kvm_inject_gp(&svm->vcpu, 0); |
2495 | ||
2496 | return NULL; | |
2497 | } | |
2498 | ||
7597f129 | 2499 | static void nested_svm_unmap(struct page *page) |
34f80cfa | 2500 | { |
7597f129 | 2501 | kunmap(page); |
34f80cfa JR |
2502 | kvm_release_page_dirty(page); |
2503 | } | |
34f80cfa | 2504 | |
ce2ac085 JR |
2505 | static int nested_svm_intercept_ioio(struct vcpu_svm *svm) |
2506 | { | |
9bf41833 JK |
2507 | unsigned port, size, iopm_len; |
2508 | u16 val, mask; | |
2509 | u8 start_bit; | |
ce2ac085 | 2510 | u64 gpa; |
34f80cfa | 2511 | |
ce2ac085 JR |
2512 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT))) |
2513 | return NESTED_EXIT_HOST; | |
34f80cfa | 2514 | |
ce2ac085 | 2515 | port = svm->vmcb->control.exit_info_1 >> 16; |
9bf41833 JK |
2516 | size = (svm->vmcb->control.exit_info_1 & SVM_IOIO_SIZE_MASK) >> |
2517 | SVM_IOIO_SIZE_SHIFT; | |
ce2ac085 | 2518 | gpa = svm->nested.vmcb_iopm + (port / 8); |
9bf41833 JK |
2519 | start_bit = port % 8; |
2520 | iopm_len = (start_bit + size > 8) ? 2 : 1; | |
2521 | mask = (0xf >> (4 - size)) << start_bit; | |
2522 | val = 0; | |
ce2ac085 | 2523 | |
54bf36aa | 2524 | if (kvm_vcpu_read_guest(&svm->vcpu, gpa, &val, iopm_len)) |
9bf41833 | 2525 | return NESTED_EXIT_DONE; |
ce2ac085 | 2526 | |
9bf41833 | 2527 | return (val & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST; |
34f80cfa JR |
2528 | } |
2529 | ||
d2477826 | 2530 | static int nested_svm_exit_handled_msr(struct vcpu_svm *svm) |
4c2161ae | 2531 | { |
0d6b3537 JR |
2532 | u32 offset, msr, value; |
2533 | int write, mask; | |
4c2161ae | 2534 | |
3d62d9aa | 2535 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT))) |
d2477826 | 2536 | return NESTED_EXIT_HOST; |
3d62d9aa | 2537 | |
0d6b3537 JR |
2538 | msr = svm->vcpu.arch.regs[VCPU_REGS_RCX]; |
2539 | offset = svm_msrpm_offset(msr); | |
2540 | write = svm->vmcb->control.exit_info_1 & 1; | |
2541 | mask = 1 << ((2 * (msr & 0xf)) + write); | |
3d62d9aa | 2542 | |
0d6b3537 JR |
2543 | if (offset == MSR_INVALID) |
2544 | return NESTED_EXIT_DONE; | |
4c2161ae | 2545 | |
0d6b3537 JR |
2546 | /* Offset is in 32 bit units but need in 8 bit units */ |
2547 | offset *= 4; | |
4c2161ae | 2548 | |
54bf36aa | 2549 | if (kvm_vcpu_read_guest(&svm->vcpu, svm->nested.vmcb_msrpm + offset, &value, 4)) |
0d6b3537 | 2550 | return NESTED_EXIT_DONE; |
3d62d9aa | 2551 | |
0d6b3537 | 2552 | return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST; |
4c2161ae JR |
2553 | } |
2554 | ||
410e4d57 | 2555 | static int nested_svm_exit_special(struct vcpu_svm *svm) |
cf74a78b | 2556 | { |
cf74a78b | 2557 | u32 exit_code = svm->vmcb->control.exit_code; |
4c2161ae | 2558 | |
410e4d57 JR |
2559 | switch (exit_code) { |
2560 | case SVM_EXIT_INTR: | |
2561 | case SVM_EXIT_NMI: | |
ff47a49b | 2562 | case SVM_EXIT_EXCP_BASE + MC_VECTOR: |
410e4d57 | 2563 | return NESTED_EXIT_HOST; |
410e4d57 | 2564 | case SVM_EXIT_NPF: |
e0231715 | 2565 | /* For now we are always handling NPFs when using them */ |
410e4d57 JR |
2566 | if (npt_enabled) |
2567 | return NESTED_EXIT_HOST; | |
2568 | break; | |
410e4d57 | 2569 | case SVM_EXIT_EXCP_BASE + PF_VECTOR: |
631bc487 GN |
2570 | /* When we're shadowing, trap PFs, but not async PF */ |
2571 | if (!npt_enabled && svm->apf_reason == 0) | |
410e4d57 JR |
2572 | return NESTED_EXIT_HOST; |
2573 | break; | |
66a562f7 JR |
2574 | case SVM_EXIT_EXCP_BASE + NM_VECTOR: |
2575 | nm_interception(svm); | |
2576 | break; | |
410e4d57 JR |
2577 | default: |
2578 | break; | |
cf74a78b AG |
2579 | } |
2580 | ||
410e4d57 JR |
2581 | return NESTED_EXIT_CONTINUE; |
2582 | } | |
2583 | ||
2584 | /* | |
2585 | * If this function returns true, this #vmexit was already handled | |
2586 | */ | |
b8e88bc8 | 2587 | static int nested_svm_intercept(struct vcpu_svm *svm) |
410e4d57 JR |
2588 | { |
2589 | u32 exit_code = svm->vmcb->control.exit_code; | |
2590 | int vmexit = NESTED_EXIT_HOST; | |
2591 | ||
cf74a78b | 2592 | switch (exit_code) { |
9c4e40b9 | 2593 | case SVM_EXIT_MSR: |
3d62d9aa | 2594 | vmexit = nested_svm_exit_handled_msr(svm); |
9c4e40b9 | 2595 | break; |
ce2ac085 JR |
2596 | case SVM_EXIT_IOIO: |
2597 | vmexit = nested_svm_intercept_ioio(svm); | |
2598 | break; | |
4ee546b4 RJ |
2599 | case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: { |
2600 | u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0); | |
2601 | if (svm->nested.intercept_cr & bit) | |
410e4d57 | 2602 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
2603 | break; |
2604 | } | |
3aed041a JR |
2605 | case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: { |
2606 | u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0); | |
2607 | if (svm->nested.intercept_dr & bit) | |
410e4d57 | 2608 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
2609 | break; |
2610 | } | |
2611 | case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: { | |
2612 | u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE); | |
aad42c64 | 2613 | if (svm->nested.intercept_exceptions & excp_bits) |
410e4d57 | 2614 | vmexit = NESTED_EXIT_DONE; |
631bc487 GN |
2615 | /* async page fault always cause vmexit */ |
2616 | else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) && | |
2617 | svm->apf_reason != 0) | |
2618 | vmexit = NESTED_EXIT_DONE; | |
cf74a78b AG |
2619 | break; |
2620 | } | |
228070b1 JR |
2621 | case SVM_EXIT_ERR: { |
2622 | vmexit = NESTED_EXIT_DONE; | |
2623 | break; | |
2624 | } | |
cf74a78b AG |
2625 | default: { |
2626 | u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR); | |
aad42c64 | 2627 | if (svm->nested.intercept & exit_bits) |
410e4d57 | 2628 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
2629 | } |
2630 | } | |
2631 | ||
b8e88bc8 JR |
2632 | return vmexit; |
2633 | } | |
2634 | ||
2635 | static int nested_svm_exit_handled(struct vcpu_svm *svm) | |
2636 | { | |
2637 | int vmexit; | |
2638 | ||
2639 | vmexit = nested_svm_intercept(svm); | |
2640 | ||
2641 | if (vmexit == NESTED_EXIT_DONE) | |
9c4e40b9 | 2642 | nested_svm_vmexit(svm); |
9c4e40b9 JR |
2643 | |
2644 | return vmexit; | |
cf74a78b AG |
2645 | } |
2646 | ||
0460a979 JR |
2647 | static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb) |
2648 | { | |
2649 | struct vmcb_control_area *dst = &dst_vmcb->control; | |
2650 | struct vmcb_control_area *from = &from_vmcb->control; | |
2651 | ||
4ee546b4 | 2652 | dst->intercept_cr = from->intercept_cr; |
3aed041a | 2653 | dst->intercept_dr = from->intercept_dr; |
0460a979 JR |
2654 | dst->intercept_exceptions = from->intercept_exceptions; |
2655 | dst->intercept = from->intercept; | |
2656 | dst->iopm_base_pa = from->iopm_base_pa; | |
2657 | dst->msrpm_base_pa = from->msrpm_base_pa; | |
2658 | dst->tsc_offset = from->tsc_offset; | |
2659 | dst->asid = from->asid; | |
2660 | dst->tlb_ctl = from->tlb_ctl; | |
2661 | dst->int_ctl = from->int_ctl; | |
2662 | dst->int_vector = from->int_vector; | |
2663 | dst->int_state = from->int_state; | |
2664 | dst->exit_code = from->exit_code; | |
2665 | dst->exit_code_hi = from->exit_code_hi; | |
2666 | dst->exit_info_1 = from->exit_info_1; | |
2667 | dst->exit_info_2 = from->exit_info_2; | |
2668 | dst->exit_int_info = from->exit_int_info; | |
2669 | dst->exit_int_info_err = from->exit_int_info_err; | |
2670 | dst->nested_ctl = from->nested_ctl; | |
2671 | dst->event_inj = from->event_inj; | |
2672 | dst->event_inj_err = from->event_inj_err; | |
2673 | dst->nested_cr3 = from->nested_cr3; | |
2674 | dst->lbr_ctl = from->lbr_ctl; | |
2675 | } | |
2676 | ||
34f80cfa | 2677 | static int nested_svm_vmexit(struct vcpu_svm *svm) |
cf74a78b | 2678 | { |
34f80cfa | 2679 | struct vmcb *nested_vmcb; |
e6aa9abd | 2680 | struct vmcb *hsave = svm->nested.hsave; |
33740e40 | 2681 | struct vmcb *vmcb = svm->vmcb; |
7597f129 | 2682 | struct page *page; |
cf74a78b | 2683 | |
17897f36 JR |
2684 | trace_kvm_nested_vmexit_inject(vmcb->control.exit_code, |
2685 | vmcb->control.exit_info_1, | |
2686 | vmcb->control.exit_info_2, | |
2687 | vmcb->control.exit_int_info, | |
e097e5ff SH |
2688 | vmcb->control.exit_int_info_err, |
2689 | KVM_ISA_SVM); | |
17897f36 | 2690 | |
7597f129 | 2691 | nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page); |
34f80cfa JR |
2692 | if (!nested_vmcb) |
2693 | return 1; | |
2694 | ||
2030753d JR |
2695 | /* Exit Guest-Mode */ |
2696 | leave_guest_mode(&svm->vcpu); | |
06fc7772 JR |
2697 | svm->nested.vmcb = 0; |
2698 | ||
cf74a78b | 2699 | /* Give the current vmcb to the guest */ |
33740e40 JR |
2700 | disable_gif(svm); |
2701 | ||
2702 | nested_vmcb->save.es = vmcb->save.es; | |
2703 | nested_vmcb->save.cs = vmcb->save.cs; | |
2704 | nested_vmcb->save.ss = vmcb->save.ss; | |
2705 | nested_vmcb->save.ds = vmcb->save.ds; | |
2706 | nested_vmcb->save.gdtr = vmcb->save.gdtr; | |
2707 | nested_vmcb->save.idtr = vmcb->save.idtr; | |
3f6a9d16 | 2708 | nested_vmcb->save.efer = svm->vcpu.arch.efer; |
cdbbdc12 | 2709 | nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu); |
9f8fe504 | 2710 | nested_vmcb->save.cr3 = kvm_read_cr3(&svm->vcpu); |
33740e40 | 2711 | nested_vmcb->save.cr2 = vmcb->save.cr2; |
cdbbdc12 | 2712 | nested_vmcb->save.cr4 = svm->vcpu.arch.cr4; |
f6e78475 | 2713 | nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu); |
33740e40 JR |
2714 | nested_vmcb->save.rip = vmcb->save.rip; |
2715 | nested_vmcb->save.rsp = vmcb->save.rsp; | |
2716 | nested_vmcb->save.rax = vmcb->save.rax; | |
2717 | nested_vmcb->save.dr7 = vmcb->save.dr7; | |
2718 | nested_vmcb->save.dr6 = vmcb->save.dr6; | |
2719 | nested_vmcb->save.cpl = vmcb->save.cpl; | |
2720 | ||
2721 | nested_vmcb->control.int_ctl = vmcb->control.int_ctl; | |
2722 | nested_vmcb->control.int_vector = vmcb->control.int_vector; | |
2723 | nested_vmcb->control.int_state = vmcb->control.int_state; | |
2724 | nested_vmcb->control.exit_code = vmcb->control.exit_code; | |
2725 | nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi; | |
2726 | nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1; | |
2727 | nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2; | |
2728 | nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info; | |
2729 | nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err; | |
6092d3d3 JR |
2730 | |
2731 | if (svm->nrips_enabled) | |
2732 | nested_vmcb->control.next_rip = vmcb->control.next_rip; | |
8d23c466 AG |
2733 | |
2734 | /* | |
2735 | * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have | |
2736 | * to make sure that we do not lose injected events. So check event_inj | |
2737 | * here and copy it to exit_int_info if it is valid. | |
2738 | * Exit_int_info and event_inj can't be both valid because the case | |
2739 | * below only happens on a VMRUN instruction intercept which has | |
2740 | * no valid exit_int_info set. | |
2741 | */ | |
2742 | if (vmcb->control.event_inj & SVM_EVTINJ_VALID) { | |
2743 | struct vmcb_control_area *nc = &nested_vmcb->control; | |
2744 | ||
2745 | nc->exit_int_info = vmcb->control.event_inj; | |
2746 | nc->exit_int_info_err = vmcb->control.event_inj_err; | |
2747 | } | |
2748 | ||
33740e40 JR |
2749 | nested_vmcb->control.tlb_ctl = 0; |
2750 | nested_vmcb->control.event_inj = 0; | |
2751 | nested_vmcb->control.event_inj_err = 0; | |
cf74a78b AG |
2752 | |
2753 | /* We always set V_INTR_MASKING and remember the old value in hflags */ | |
2754 | if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK)) | |
2755 | nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK; | |
2756 | ||
cf74a78b | 2757 | /* Restore the original control entries */ |
0460a979 | 2758 | copy_vmcb_control_area(vmcb, hsave); |
cf74a78b | 2759 | |
219b65dc AG |
2760 | kvm_clear_exception_queue(&svm->vcpu); |
2761 | kvm_clear_interrupt_queue(&svm->vcpu); | |
cf74a78b | 2762 | |
4b16184c JR |
2763 | svm->nested.nested_cr3 = 0; |
2764 | ||
cf74a78b AG |
2765 | /* Restore selected save entries */ |
2766 | svm->vmcb->save.es = hsave->save.es; | |
2767 | svm->vmcb->save.cs = hsave->save.cs; | |
2768 | svm->vmcb->save.ss = hsave->save.ss; | |
2769 | svm->vmcb->save.ds = hsave->save.ds; | |
2770 | svm->vmcb->save.gdtr = hsave->save.gdtr; | |
2771 | svm->vmcb->save.idtr = hsave->save.idtr; | |
f6e78475 | 2772 | kvm_set_rflags(&svm->vcpu, hsave->save.rflags); |
cf74a78b AG |
2773 | svm_set_efer(&svm->vcpu, hsave->save.efer); |
2774 | svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE); | |
2775 | svm_set_cr4(&svm->vcpu, hsave->save.cr4); | |
2776 | if (npt_enabled) { | |
2777 | svm->vmcb->save.cr3 = hsave->save.cr3; | |
2778 | svm->vcpu.arch.cr3 = hsave->save.cr3; | |
2779 | } else { | |
2390218b | 2780 | (void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3); |
cf74a78b AG |
2781 | } |
2782 | kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax); | |
2783 | kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp); | |
2784 | kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip); | |
2785 | svm->vmcb->save.dr7 = 0; | |
2786 | svm->vmcb->save.cpl = 0; | |
2787 | svm->vmcb->control.exit_int_info = 0; | |
2788 | ||
8d28fec4 RJ |
2789 | mark_all_dirty(svm->vmcb); |
2790 | ||
7597f129 | 2791 | nested_svm_unmap(page); |
cf74a78b | 2792 | |
4b16184c | 2793 | nested_svm_uninit_mmu_context(&svm->vcpu); |
cf74a78b AG |
2794 | kvm_mmu_reset_context(&svm->vcpu); |
2795 | kvm_mmu_load(&svm->vcpu); | |
2796 | ||
2797 | return 0; | |
2798 | } | |
3d6368ef | 2799 | |
9738b2c9 | 2800 | static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm) |
3d6368ef | 2801 | { |
323c3d80 JR |
2802 | /* |
2803 | * This function merges the msr permission bitmaps of kvm and the | |
c5ec2e56 | 2804 | * nested vmcb. It is optimized in that it only merges the parts where |
323c3d80 JR |
2805 | * the kvm msr permission bitmap may contain zero bits |
2806 | */ | |
3d6368ef | 2807 | int i; |
9738b2c9 | 2808 | |
323c3d80 JR |
2809 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT))) |
2810 | return true; | |
9738b2c9 | 2811 | |
323c3d80 JR |
2812 | for (i = 0; i < MSRPM_OFFSETS; i++) { |
2813 | u32 value, p; | |
2814 | u64 offset; | |
9738b2c9 | 2815 | |
323c3d80 JR |
2816 | if (msrpm_offsets[i] == 0xffffffff) |
2817 | break; | |
3d6368ef | 2818 | |
0d6b3537 JR |
2819 | p = msrpm_offsets[i]; |
2820 | offset = svm->nested.vmcb_msrpm + (p * 4); | |
323c3d80 | 2821 | |
54bf36aa | 2822 | if (kvm_vcpu_read_guest(&svm->vcpu, offset, &value, 4)) |
323c3d80 JR |
2823 | return false; |
2824 | ||
2825 | svm->nested.msrpm[p] = svm->msrpm[p] | value; | |
2826 | } | |
3d6368ef | 2827 | |
323c3d80 | 2828 | svm->vmcb->control.msrpm_base_pa = __pa(svm->nested.msrpm); |
9738b2c9 JR |
2829 | |
2830 | return true; | |
3d6368ef AG |
2831 | } |
2832 | ||
52c65a30 JR |
2833 | static bool nested_vmcb_checks(struct vmcb *vmcb) |
2834 | { | |
2835 | if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0) | |
2836 | return false; | |
2837 | ||
dbe77584 JR |
2838 | if (vmcb->control.asid == 0) |
2839 | return false; | |
2840 | ||
4b16184c JR |
2841 | if (vmcb->control.nested_ctl && !npt_enabled) |
2842 | return false; | |
2843 | ||
52c65a30 JR |
2844 | return true; |
2845 | } | |
2846 | ||
9738b2c9 | 2847 | static bool nested_svm_vmrun(struct vcpu_svm *svm) |
3d6368ef | 2848 | { |
9738b2c9 | 2849 | struct vmcb *nested_vmcb; |
e6aa9abd | 2850 | struct vmcb *hsave = svm->nested.hsave; |
defbba56 | 2851 | struct vmcb *vmcb = svm->vmcb; |
7597f129 | 2852 | struct page *page; |
06fc7772 | 2853 | u64 vmcb_gpa; |
3d6368ef | 2854 | |
06fc7772 | 2855 | vmcb_gpa = svm->vmcb->save.rax; |
3d6368ef | 2856 | |
7597f129 | 2857 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); |
9738b2c9 JR |
2858 | if (!nested_vmcb) |
2859 | return false; | |
2860 | ||
52c65a30 JR |
2861 | if (!nested_vmcb_checks(nested_vmcb)) { |
2862 | nested_vmcb->control.exit_code = SVM_EXIT_ERR; | |
2863 | nested_vmcb->control.exit_code_hi = 0; | |
2864 | nested_vmcb->control.exit_info_1 = 0; | |
2865 | nested_vmcb->control.exit_info_2 = 0; | |
2866 | ||
2867 | nested_svm_unmap(page); | |
2868 | ||
2869 | return false; | |
2870 | } | |
2871 | ||
b75f4eb3 | 2872 | trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb_gpa, |
0ac406de JR |
2873 | nested_vmcb->save.rip, |
2874 | nested_vmcb->control.int_ctl, | |
2875 | nested_vmcb->control.event_inj, | |
2876 | nested_vmcb->control.nested_ctl); | |
2877 | ||
4ee546b4 RJ |
2878 | trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff, |
2879 | nested_vmcb->control.intercept_cr >> 16, | |
2e554e8d JR |
2880 | nested_vmcb->control.intercept_exceptions, |
2881 | nested_vmcb->control.intercept); | |
2882 | ||
3d6368ef | 2883 | /* Clear internal status */ |
219b65dc AG |
2884 | kvm_clear_exception_queue(&svm->vcpu); |
2885 | kvm_clear_interrupt_queue(&svm->vcpu); | |
3d6368ef | 2886 | |
e0231715 JR |
2887 | /* |
2888 | * Save the old vmcb, so we don't need to pick what we save, but can | |
2889 | * restore everything when a VMEXIT occurs | |
2890 | */ | |
defbba56 JR |
2891 | hsave->save.es = vmcb->save.es; |
2892 | hsave->save.cs = vmcb->save.cs; | |
2893 | hsave->save.ss = vmcb->save.ss; | |
2894 | hsave->save.ds = vmcb->save.ds; | |
2895 | hsave->save.gdtr = vmcb->save.gdtr; | |
2896 | hsave->save.idtr = vmcb->save.idtr; | |
f6801dff | 2897 | hsave->save.efer = svm->vcpu.arch.efer; |
4d4ec087 | 2898 | hsave->save.cr0 = kvm_read_cr0(&svm->vcpu); |
defbba56 | 2899 | hsave->save.cr4 = svm->vcpu.arch.cr4; |
f6e78475 | 2900 | hsave->save.rflags = kvm_get_rflags(&svm->vcpu); |
b75f4eb3 | 2901 | hsave->save.rip = kvm_rip_read(&svm->vcpu); |
defbba56 JR |
2902 | hsave->save.rsp = vmcb->save.rsp; |
2903 | hsave->save.rax = vmcb->save.rax; | |
2904 | if (npt_enabled) | |
2905 | hsave->save.cr3 = vmcb->save.cr3; | |
2906 | else | |
9f8fe504 | 2907 | hsave->save.cr3 = kvm_read_cr3(&svm->vcpu); |
defbba56 | 2908 | |
0460a979 | 2909 | copy_vmcb_control_area(hsave, vmcb); |
3d6368ef | 2910 | |
f6e78475 | 2911 | if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF) |
3d6368ef AG |
2912 | svm->vcpu.arch.hflags |= HF_HIF_MASK; |
2913 | else | |
2914 | svm->vcpu.arch.hflags &= ~HF_HIF_MASK; | |
2915 | ||
4b16184c JR |
2916 | if (nested_vmcb->control.nested_ctl) { |
2917 | kvm_mmu_unload(&svm->vcpu); | |
2918 | svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3; | |
2919 | nested_svm_init_mmu_context(&svm->vcpu); | |
2920 | } | |
2921 | ||
3d6368ef AG |
2922 | /* Load the nested guest state */ |
2923 | svm->vmcb->save.es = nested_vmcb->save.es; | |
2924 | svm->vmcb->save.cs = nested_vmcb->save.cs; | |
2925 | svm->vmcb->save.ss = nested_vmcb->save.ss; | |
2926 | svm->vmcb->save.ds = nested_vmcb->save.ds; | |
2927 | svm->vmcb->save.gdtr = nested_vmcb->save.gdtr; | |
2928 | svm->vmcb->save.idtr = nested_vmcb->save.idtr; | |
f6e78475 | 2929 | kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags); |
3d6368ef AG |
2930 | svm_set_efer(&svm->vcpu, nested_vmcb->save.efer); |
2931 | svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0); | |
2932 | svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4); | |
2933 | if (npt_enabled) { | |
2934 | svm->vmcb->save.cr3 = nested_vmcb->save.cr3; | |
2935 | svm->vcpu.arch.cr3 = nested_vmcb->save.cr3; | |
0e5cbe36 | 2936 | } else |
2390218b | 2937 | (void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3); |
0e5cbe36 JR |
2938 | |
2939 | /* Guest paging mode is active - reset mmu */ | |
2940 | kvm_mmu_reset_context(&svm->vcpu); | |
2941 | ||
defbba56 | 2942 | svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2; |
3d6368ef AG |
2943 | kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax); |
2944 | kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp); | |
2945 | kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip); | |
e0231715 | 2946 | |
3d6368ef AG |
2947 | /* In case we don't even reach vcpu_run, the fields are not updated */ |
2948 | svm->vmcb->save.rax = nested_vmcb->save.rax; | |
2949 | svm->vmcb->save.rsp = nested_vmcb->save.rsp; | |
2950 | svm->vmcb->save.rip = nested_vmcb->save.rip; | |
2951 | svm->vmcb->save.dr7 = nested_vmcb->save.dr7; | |
2952 | svm->vmcb->save.dr6 = nested_vmcb->save.dr6; | |
2953 | svm->vmcb->save.cpl = nested_vmcb->save.cpl; | |
2954 | ||
f7138538 | 2955 | svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL; |
ce2ac085 | 2956 | svm->nested.vmcb_iopm = nested_vmcb->control.iopm_base_pa & ~0x0fffULL; |
3d6368ef | 2957 | |
aad42c64 | 2958 | /* cache intercepts */ |
4ee546b4 | 2959 | svm->nested.intercept_cr = nested_vmcb->control.intercept_cr; |
3aed041a | 2960 | svm->nested.intercept_dr = nested_vmcb->control.intercept_dr; |
aad42c64 JR |
2961 | svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions; |
2962 | svm->nested.intercept = nested_vmcb->control.intercept; | |
2963 | ||
f40f6a45 | 2964 | svm_flush_tlb(&svm->vcpu); |
3d6368ef | 2965 | svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK; |
3d6368ef AG |
2966 | if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK) |
2967 | svm->vcpu.arch.hflags |= HF_VINTR_MASK; | |
2968 | else | |
2969 | svm->vcpu.arch.hflags &= ~HF_VINTR_MASK; | |
2970 | ||
88ab24ad JR |
2971 | if (svm->vcpu.arch.hflags & HF_VINTR_MASK) { |
2972 | /* We only want the cr8 intercept bits of the guest */ | |
4ee546b4 RJ |
2973 | clr_cr_intercept(svm, INTERCEPT_CR8_READ); |
2974 | clr_cr_intercept(svm, INTERCEPT_CR8_WRITE); | |
88ab24ad JR |
2975 | } |
2976 | ||
0d945bd9 | 2977 | /* We don't want to see VMMCALLs from a nested guest */ |
8a05a1b8 | 2978 | clr_intercept(svm, INTERCEPT_VMMCALL); |
0d945bd9 | 2979 | |
88ab24ad | 2980 | svm->vmcb->control.lbr_ctl = nested_vmcb->control.lbr_ctl; |
3d6368ef AG |
2981 | svm->vmcb->control.int_vector = nested_vmcb->control.int_vector; |
2982 | svm->vmcb->control.int_state = nested_vmcb->control.int_state; | |
2983 | svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset; | |
3d6368ef AG |
2984 | svm->vmcb->control.event_inj = nested_vmcb->control.event_inj; |
2985 | svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err; | |
2986 | ||
7597f129 | 2987 | nested_svm_unmap(page); |
9738b2c9 | 2988 | |
2030753d JR |
2989 | /* Enter Guest-Mode */ |
2990 | enter_guest_mode(&svm->vcpu); | |
2991 | ||
384c6368 JR |
2992 | /* |
2993 | * Merge guest and host intercepts - must be called with vcpu in | |
2994 | * guest-mode to take affect here | |
2995 | */ | |
2996 | recalc_intercepts(svm); | |
2997 | ||
06fc7772 | 2998 | svm->nested.vmcb = vmcb_gpa; |
9738b2c9 | 2999 | |
2af9194d | 3000 | enable_gif(svm); |
3d6368ef | 3001 | |
8d28fec4 RJ |
3002 | mark_all_dirty(svm->vmcb); |
3003 | ||
9738b2c9 | 3004 | return true; |
3d6368ef AG |
3005 | } |
3006 | ||
9966bf68 | 3007 | static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb) |
5542675b AG |
3008 | { |
3009 | to_vmcb->save.fs = from_vmcb->save.fs; | |
3010 | to_vmcb->save.gs = from_vmcb->save.gs; | |
3011 | to_vmcb->save.tr = from_vmcb->save.tr; | |
3012 | to_vmcb->save.ldtr = from_vmcb->save.ldtr; | |
3013 | to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base; | |
3014 | to_vmcb->save.star = from_vmcb->save.star; | |
3015 | to_vmcb->save.lstar = from_vmcb->save.lstar; | |
3016 | to_vmcb->save.cstar = from_vmcb->save.cstar; | |
3017 | to_vmcb->save.sfmask = from_vmcb->save.sfmask; | |
3018 | to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs; | |
3019 | to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp; | |
3020 | to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip; | |
5542675b AG |
3021 | } |
3022 | ||
851ba692 | 3023 | static int vmload_interception(struct vcpu_svm *svm) |
5542675b | 3024 | { |
9966bf68 | 3025 | struct vmcb *nested_vmcb; |
7597f129 | 3026 | struct page *page; |
9966bf68 | 3027 | |
5542675b AG |
3028 | if (nested_svm_check_permissions(svm)) |
3029 | return 1; | |
3030 | ||
7597f129 | 3031 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); |
9966bf68 JR |
3032 | if (!nested_vmcb) |
3033 | return 1; | |
3034 | ||
e3e9ed3d JR |
3035 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; |
3036 | skip_emulated_instruction(&svm->vcpu); | |
3037 | ||
9966bf68 | 3038 | nested_svm_vmloadsave(nested_vmcb, svm->vmcb); |
7597f129 | 3039 | nested_svm_unmap(page); |
5542675b AG |
3040 | |
3041 | return 1; | |
3042 | } | |
3043 | ||
851ba692 | 3044 | static int vmsave_interception(struct vcpu_svm *svm) |
5542675b | 3045 | { |
9966bf68 | 3046 | struct vmcb *nested_vmcb; |
7597f129 | 3047 | struct page *page; |
9966bf68 | 3048 | |
5542675b AG |
3049 | if (nested_svm_check_permissions(svm)) |
3050 | return 1; | |
3051 | ||
7597f129 | 3052 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); |
9966bf68 JR |
3053 | if (!nested_vmcb) |
3054 | return 1; | |
3055 | ||
e3e9ed3d JR |
3056 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; |
3057 | skip_emulated_instruction(&svm->vcpu); | |
3058 | ||
9966bf68 | 3059 | nested_svm_vmloadsave(svm->vmcb, nested_vmcb); |
7597f129 | 3060 | nested_svm_unmap(page); |
5542675b AG |
3061 | |
3062 | return 1; | |
3063 | } | |
3064 | ||
851ba692 | 3065 | static int vmrun_interception(struct vcpu_svm *svm) |
3d6368ef | 3066 | { |
3d6368ef AG |
3067 | if (nested_svm_check_permissions(svm)) |
3068 | return 1; | |
3069 | ||
b75f4eb3 RJ |
3070 | /* Save rip after vmrun instruction */ |
3071 | kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3); | |
3d6368ef | 3072 | |
9738b2c9 | 3073 | if (!nested_svm_vmrun(svm)) |
3d6368ef AG |
3074 | return 1; |
3075 | ||
9738b2c9 | 3076 | if (!nested_svm_vmrun_msrpm(svm)) |
1f8da478 JR |
3077 | goto failed; |
3078 | ||
3079 | return 1; | |
3080 | ||
3081 | failed: | |
3082 | ||
3083 | svm->vmcb->control.exit_code = SVM_EXIT_ERR; | |
3084 | svm->vmcb->control.exit_code_hi = 0; | |
3085 | svm->vmcb->control.exit_info_1 = 0; | |
3086 | svm->vmcb->control.exit_info_2 = 0; | |
3087 | ||
3088 | nested_svm_vmexit(svm); | |
3d6368ef AG |
3089 | |
3090 | return 1; | |
3091 | } | |
3092 | ||
851ba692 | 3093 | static int stgi_interception(struct vcpu_svm *svm) |
1371d904 AG |
3094 | { |
3095 | if (nested_svm_check_permissions(svm)) | |
3096 | return 1; | |
3097 | ||
3098 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
3099 | skip_emulated_instruction(&svm->vcpu); | |
3842d135 | 3100 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
1371d904 | 3101 | |
2af9194d | 3102 | enable_gif(svm); |
1371d904 AG |
3103 | |
3104 | return 1; | |
3105 | } | |
3106 | ||
851ba692 | 3107 | static int clgi_interception(struct vcpu_svm *svm) |
1371d904 AG |
3108 | { |
3109 | if (nested_svm_check_permissions(svm)) | |
3110 | return 1; | |
3111 | ||
3112 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
3113 | skip_emulated_instruction(&svm->vcpu); | |
3114 | ||
2af9194d | 3115 | disable_gif(svm); |
1371d904 AG |
3116 | |
3117 | /* After a CLGI no interrupts should come */ | |
340d3bc3 SS |
3118 | if (!kvm_vcpu_apicv_active(&svm->vcpu)) { |
3119 | svm_clear_vintr(svm); | |
3120 | svm->vmcb->control.int_ctl &= ~V_IRQ_MASK; | |
3121 | mark_dirty(svm->vmcb, VMCB_INTR); | |
3122 | } | |
decdbf6a | 3123 | |
1371d904 AG |
3124 | return 1; |
3125 | } | |
3126 | ||
851ba692 | 3127 | static int invlpga_interception(struct vcpu_svm *svm) |
ff092385 AG |
3128 | { |
3129 | struct kvm_vcpu *vcpu = &svm->vcpu; | |
ff092385 | 3130 | |
668f198f DK |
3131 | trace_kvm_invlpga(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RCX), |
3132 | kvm_register_read(&svm->vcpu, VCPU_REGS_RAX)); | |
ec1ff790 | 3133 | |
ff092385 | 3134 | /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */ |
668f198f | 3135 | kvm_mmu_invlpg(vcpu, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX)); |
ff092385 AG |
3136 | |
3137 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
3138 | skip_emulated_instruction(&svm->vcpu); | |
3139 | return 1; | |
3140 | } | |
3141 | ||
532a46b9 JR |
3142 | static int skinit_interception(struct vcpu_svm *svm) |
3143 | { | |
668f198f | 3144 | trace_kvm_skinit(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX)); |
532a46b9 JR |
3145 | |
3146 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
3147 | return 1; | |
3148 | } | |
3149 | ||
dab429a7 DK |
3150 | static int wbinvd_interception(struct vcpu_svm *svm) |
3151 | { | |
6affcbed | 3152 | return kvm_emulate_wbinvd(&svm->vcpu); |
dab429a7 DK |
3153 | } |
3154 | ||
81dd35d4 JR |
3155 | static int xsetbv_interception(struct vcpu_svm *svm) |
3156 | { | |
3157 | u64 new_bv = kvm_read_edx_eax(&svm->vcpu); | |
3158 | u32 index = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX); | |
3159 | ||
3160 | if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) { | |
3161 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
3162 | skip_emulated_instruction(&svm->vcpu); | |
3163 | } | |
3164 | ||
3165 | return 1; | |
3166 | } | |
3167 | ||
851ba692 | 3168 | static int task_switch_interception(struct vcpu_svm *svm) |
6aa8b732 | 3169 | { |
37817f29 | 3170 | u16 tss_selector; |
64a7ec06 GN |
3171 | int reason; |
3172 | int int_type = svm->vmcb->control.exit_int_info & | |
3173 | SVM_EXITINTINFO_TYPE_MASK; | |
8317c298 | 3174 | int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK; |
fe8e7f83 GN |
3175 | uint32_t type = |
3176 | svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK; | |
3177 | uint32_t idt_v = | |
3178 | svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID; | |
e269fb21 JK |
3179 | bool has_error_code = false; |
3180 | u32 error_code = 0; | |
37817f29 IE |
3181 | |
3182 | tss_selector = (u16)svm->vmcb->control.exit_info_1; | |
64a7ec06 | 3183 | |
37817f29 IE |
3184 | if (svm->vmcb->control.exit_info_2 & |
3185 | (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET)) | |
64a7ec06 GN |
3186 | reason = TASK_SWITCH_IRET; |
3187 | else if (svm->vmcb->control.exit_info_2 & | |
3188 | (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP)) | |
3189 | reason = TASK_SWITCH_JMP; | |
fe8e7f83 | 3190 | else if (idt_v) |
64a7ec06 GN |
3191 | reason = TASK_SWITCH_GATE; |
3192 | else | |
3193 | reason = TASK_SWITCH_CALL; | |
3194 | ||
fe8e7f83 GN |
3195 | if (reason == TASK_SWITCH_GATE) { |
3196 | switch (type) { | |
3197 | case SVM_EXITINTINFO_TYPE_NMI: | |
3198 | svm->vcpu.arch.nmi_injected = false; | |
3199 | break; | |
3200 | case SVM_EXITINTINFO_TYPE_EXEPT: | |
e269fb21 JK |
3201 | if (svm->vmcb->control.exit_info_2 & |
3202 | (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE)) { | |
3203 | has_error_code = true; | |
3204 | error_code = | |
3205 | (u32)svm->vmcb->control.exit_info_2; | |
3206 | } | |
fe8e7f83 GN |
3207 | kvm_clear_exception_queue(&svm->vcpu); |
3208 | break; | |
3209 | case SVM_EXITINTINFO_TYPE_INTR: | |
3210 | kvm_clear_interrupt_queue(&svm->vcpu); | |
3211 | break; | |
3212 | default: | |
3213 | break; | |
3214 | } | |
3215 | } | |
64a7ec06 | 3216 | |
8317c298 GN |
3217 | if (reason != TASK_SWITCH_GATE || |
3218 | int_type == SVM_EXITINTINFO_TYPE_SOFT || | |
3219 | (int_type == SVM_EXITINTINFO_TYPE_EXEPT && | |
f629cf84 GN |
3220 | (int_vec == OF_VECTOR || int_vec == BP_VECTOR))) |
3221 | skip_emulated_instruction(&svm->vcpu); | |
64a7ec06 | 3222 | |
7f3d35fd KW |
3223 | if (int_type != SVM_EXITINTINFO_TYPE_SOFT) |
3224 | int_vec = -1; | |
3225 | ||
3226 | if (kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason, | |
acb54517 GN |
3227 | has_error_code, error_code) == EMULATE_FAIL) { |
3228 | svm->vcpu.run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
3229 | svm->vcpu.run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
3230 | svm->vcpu.run->internal.ndata = 0; | |
3231 | return 0; | |
3232 | } | |
3233 | return 1; | |
6aa8b732 AK |
3234 | } |
3235 | ||
851ba692 | 3236 | static int cpuid_interception(struct vcpu_svm *svm) |
6aa8b732 | 3237 | { |
5fdbf976 | 3238 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
6a908b62 | 3239 | return kvm_emulate_cpuid(&svm->vcpu); |
6aa8b732 AK |
3240 | } |
3241 | ||
851ba692 | 3242 | static int iret_interception(struct vcpu_svm *svm) |
95ba8273 GN |
3243 | { |
3244 | ++svm->vcpu.stat.nmi_window_exits; | |
8a05a1b8 | 3245 | clr_intercept(svm, INTERCEPT_IRET); |
44c11430 | 3246 | svm->vcpu.arch.hflags |= HF_IRET_MASK; |
bd3d1ec3 | 3247 | svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu); |
f303b4ce | 3248 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
95ba8273 GN |
3249 | return 1; |
3250 | } | |
3251 | ||
851ba692 | 3252 | static int invlpg_interception(struct vcpu_svm *svm) |
a7052897 | 3253 | { |
df4f3108 AP |
3254 | if (!static_cpu_has(X86_FEATURE_DECODEASSISTS)) |
3255 | return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE; | |
3256 | ||
3257 | kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1); | |
3258 | skip_emulated_instruction(&svm->vcpu); | |
3259 | return 1; | |
a7052897 MT |
3260 | } |
3261 | ||
851ba692 | 3262 | static int emulate_on_interception(struct vcpu_svm *svm) |
6aa8b732 | 3263 | { |
51d8b661 | 3264 | return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE; |
6aa8b732 AK |
3265 | } |
3266 | ||
332b56e4 AK |
3267 | static int rdpmc_interception(struct vcpu_svm *svm) |
3268 | { | |
3269 | int err; | |
3270 | ||
3271 | if (!static_cpu_has(X86_FEATURE_NRIPS)) | |
3272 | return emulate_on_interception(svm); | |
3273 | ||
3274 | err = kvm_rdpmc(&svm->vcpu); | |
6affcbed | 3275 | return kvm_complete_insn_gp(&svm->vcpu, err); |
332b56e4 AK |
3276 | } |
3277 | ||
52eb5a6d XL |
3278 | static bool check_selective_cr0_intercepted(struct vcpu_svm *svm, |
3279 | unsigned long val) | |
628afd2a JR |
3280 | { |
3281 | unsigned long cr0 = svm->vcpu.arch.cr0; | |
3282 | bool ret = false; | |
3283 | u64 intercept; | |
3284 | ||
3285 | intercept = svm->nested.intercept; | |
3286 | ||
3287 | if (!is_guest_mode(&svm->vcpu) || | |
3288 | (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0)))) | |
3289 | return false; | |
3290 | ||
3291 | cr0 &= ~SVM_CR0_SELECTIVE_MASK; | |
3292 | val &= ~SVM_CR0_SELECTIVE_MASK; | |
3293 | ||
3294 | if (cr0 ^ val) { | |
3295 | svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE; | |
3296 | ret = (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE); | |
3297 | } | |
3298 | ||
3299 | return ret; | |
3300 | } | |
3301 | ||
7ff76d58 AP |
3302 | #define CR_VALID (1ULL << 63) |
3303 | ||
3304 | static int cr_interception(struct vcpu_svm *svm) | |
3305 | { | |
3306 | int reg, cr; | |
3307 | unsigned long val; | |
3308 | int err; | |
3309 | ||
3310 | if (!static_cpu_has(X86_FEATURE_DECODEASSISTS)) | |
3311 | return emulate_on_interception(svm); | |
3312 | ||
3313 | if (unlikely((svm->vmcb->control.exit_info_1 & CR_VALID) == 0)) | |
3314 | return emulate_on_interception(svm); | |
3315 | ||
3316 | reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK; | |
5e57518d DK |
3317 | if (svm->vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE) |
3318 | cr = SVM_EXIT_WRITE_CR0 - SVM_EXIT_READ_CR0; | |
3319 | else | |
3320 | cr = svm->vmcb->control.exit_code - SVM_EXIT_READ_CR0; | |
7ff76d58 AP |
3321 | |
3322 | err = 0; | |
3323 | if (cr >= 16) { /* mov to cr */ | |
3324 | cr -= 16; | |
3325 | val = kvm_register_read(&svm->vcpu, reg); | |
3326 | switch (cr) { | |
3327 | case 0: | |
628afd2a JR |
3328 | if (!check_selective_cr0_intercepted(svm, val)) |
3329 | err = kvm_set_cr0(&svm->vcpu, val); | |
977b2d03 JR |
3330 | else |
3331 | return 1; | |
3332 | ||
7ff76d58 AP |
3333 | break; |
3334 | case 3: | |
3335 | err = kvm_set_cr3(&svm->vcpu, val); | |
3336 | break; | |
3337 | case 4: | |
3338 | err = kvm_set_cr4(&svm->vcpu, val); | |
3339 | break; | |
3340 | case 8: | |
3341 | err = kvm_set_cr8(&svm->vcpu, val); | |
3342 | break; | |
3343 | default: | |
3344 | WARN(1, "unhandled write to CR%d", cr); | |
3345 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
3346 | return 1; | |
3347 | } | |
3348 | } else { /* mov from cr */ | |
3349 | switch (cr) { | |
3350 | case 0: | |
3351 | val = kvm_read_cr0(&svm->vcpu); | |
3352 | break; | |
3353 | case 2: | |
3354 | val = svm->vcpu.arch.cr2; | |
3355 | break; | |
3356 | case 3: | |
9f8fe504 | 3357 | val = kvm_read_cr3(&svm->vcpu); |
7ff76d58 AP |
3358 | break; |
3359 | case 4: | |
3360 | val = kvm_read_cr4(&svm->vcpu); | |
3361 | break; | |
3362 | case 8: | |
3363 | val = kvm_get_cr8(&svm->vcpu); | |
3364 | break; | |
3365 | default: | |
3366 | WARN(1, "unhandled read from CR%d", cr); | |
3367 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
3368 | return 1; | |
3369 | } | |
3370 | kvm_register_write(&svm->vcpu, reg, val); | |
3371 | } | |
6affcbed | 3372 | return kvm_complete_insn_gp(&svm->vcpu, err); |
7ff76d58 AP |
3373 | } |
3374 | ||
cae3797a AP |
3375 | static int dr_interception(struct vcpu_svm *svm) |
3376 | { | |
3377 | int reg, dr; | |
3378 | unsigned long val; | |
cae3797a | 3379 | |
facb0139 PB |
3380 | if (svm->vcpu.guest_debug == 0) { |
3381 | /* | |
3382 | * No more DR vmexits; force a reload of the debug registers | |
3383 | * and reenter on this instruction. The next vmexit will | |
3384 | * retrieve the full state of the debug registers. | |
3385 | */ | |
3386 | clr_dr_intercepts(svm); | |
3387 | svm->vcpu.arch.switch_db_regs |= KVM_DEBUGREG_WONT_EXIT; | |
3388 | return 1; | |
3389 | } | |
3390 | ||
cae3797a AP |
3391 | if (!boot_cpu_has(X86_FEATURE_DECODEASSISTS)) |
3392 | return emulate_on_interception(svm); | |
3393 | ||
3394 | reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK; | |
3395 | dr = svm->vmcb->control.exit_code - SVM_EXIT_READ_DR0; | |
3396 | ||
3397 | if (dr >= 16) { /* mov to DRn */ | |
16f8a6f9 NA |
3398 | if (!kvm_require_dr(&svm->vcpu, dr - 16)) |
3399 | return 1; | |
cae3797a AP |
3400 | val = kvm_register_read(&svm->vcpu, reg); |
3401 | kvm_set_dr(&svm->vcpu, dr - 16, val); | |
3402 | } else { | |
16f8a6f9 NA |
3403 | if (!kvm_require_dr(&svm->vcpu, dr)) |
3404 | return 1; | |
3405 | kvm_get_dr(&svm->vcpu, dr, &val); | |
3406 | kvm_register_write(&svm->vcpu, reg, val); | |
cae3797a AP |
3407 | } |
3408 | ||
2c46d2ae JR |
3409 | skip_emulated_instruction(&svm->vcpu); |
3410 | ||
cae3797a AP |
3411 | return 1; |
3412 | } | |
3413 | ||
851ba692 | 3414 | static int cr8_write_interception(struct vcpu_svm *svm) |
1d075434 | 3415 | { |
851ba692 | 3416 | struct kvm_run *kvm_run = svm->vcpu.run; |
eea1cff9 | 3417 | int r; |
851ba692 | 3418 | |
0a5fff19 GN |
3419 | u8 cr8_prev = kvm_get_cr8(&svm->vcpu); |
3420 | /* instruction emulation calls kvm_set_cr8() */ | |
7ff76d58 | 3421 | r = cr_interception(svm); |
35754c98 | 3422 | if (lapic_in_kernel(&svm->vcpu)) |
7ff76d58 | 3423 | return r; |
0a5fff19 | 3424 | if (cr8_prev <= kvm_get_cr8(&svm->vcpu)) |
7ff76d58 | 3425 | return r; |
1d075434 JR |
3426 | kvm_run->exit_reason = KVM_EXIT_SET_TPR; |
3427 | return 0; | |
3428 | } | |
3429 | ||
609e36d3 | 3430 | static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
6aa8b732 | 3431 | { |
a2fa3e9f GH |
3432 | struct vcpu_svm *svm = to_svm(vcpu); |
3433 | ||
609e36d3 | 3434 | switch (msr_info->index) { |
af24a4e4 | 3435 | case MSR_IA32_TSC: { |
609e36d3 | 3436 | msr_info->data = svm->vmcb->control.tsc_offset + |
35181e86 | 3437 | kvm_scale_tsc(vcpu, rdtsc()); |
fbc0db76 | 3438 | |
6aa8b732 AK |
3439 | break; |
3440 | } | |
8c06585d | 3441 | case MSR_STAR: |
609e36d3 | 3442 | msr_info->data = svm->vmcb->save.star; |
6aa8b732 | 3443 | break; |
0e859cac | 3444 | #ifdef CONFIG_X86_64 |
6aa8b732 | 3445 | case MSR_LSTAR: |
609e36d3 | 3446 | msr_info->data = svm->vmcb->save.lstar; |
6aa8b732 AK |
3447 | break; |
3448 | case MSR_CSTAR: | |
609e36d3 | 3449 | msr_info->data = svm->vmcb->save.cstar; |
6aa8b732 AK |
3450 | break; |
3451 | case MSR_KERNEL_GS_BASE: | |
609e36d3 | 3452 | msr_info->data = svm->vmcb->save.kernel_gs_base; |
6aa8b732 AK |
3453 | break; |
3454 | case MSR_SYSCALL_MASK: | |
609e36d3 | 3455 | msr_info->data = svm->vmcb->save.sfmask; |
6aa8b732 AK |
3456 | break; |
3457 | #endif | |
3458 | case MSR_IA32_SYSENTER_CS: | |
609e36d3 | 3459 | msr_info->data = svm->vmcb->save.sysenter_cs; |
6aa8b732 AK |
3460 | break; |
3461 | case MSR_IA32_SYSENTER_EIP: | |
609e36d3 | 3462 | msr_info->data = svm->sysenter_eip; |
6aa8b732 AK |
3463 | break; |
3464 | case MSR_IA32_SYSENTER_ESP: | |
609e36d3 | 3465 | msr_info->data = svm->sysenter_esp; |
6aa8b732 | 3466 | break; |
46896c73 PB |
3467 | case MSR_TSC_AUX: |
3468 | if (!boot_cpu_has(X86_FEATURE_RDTSCP)) | |
3469 | return 1; | |
3470 | msr_info->data = svm->tsc_aux; | |
3471 | break; | |
e0231715 JR |
3472 | /* |
3473 | * Nobody will change the following 5 values in the VMCB so we can | |
3474 | * safely return them on rdmsr. They will always be 0 until LBRV is | |
3475 | * implemented. | |
3476 | */ | |
a2938c80 | 3477 | case MSR_IA32_DEBUGCTLMSR: |
609e36d3 | 3478 | msr_info->data = svm->vmcb->save.dbgctl; |
a2938c80 JR |
3479 | break; |
3480 | case MSR_IA32_LASTBRANCHFROMIP: | |
609e36d3 | 3481 | msr_info->data = svm->vmcb->save.br_from; |
a2938c80 JR |
3482 | break; |
3483 | case MSR_IA32_LASTBRANCHTOIP: | |
609e36d3 | 3484 | msr_info->data = svm->vmcb->save.br_to; |
a2938c80 JR |
3485 | break; |
3486 | case MSR_IA32_LASTINTFROMIP: | |
609e36d3 | 3487 | msr_info->data = svm->vmcb->save.last_excp_from; |
a2938c80 JR |
3488 | break; |
3489 | case MSR_IA32_LASTINTTOIP: | |
609e36d3 | 3490 | msr_info->data = svm->vmcb->save.last_excp_to; |
a2938c80 | 3491 | break; |
b286d5d8 | 3492 | case MSR_VM_HSAVE_PA: |
609e36d3 | 3493 | msr_info->data = svm->nested.hsave_msr; |
b286d5d8 | 3494 | break; |
eb6f302e | 3495 | case MSR_VM_CR: |
609e36d3 | 3496 | msr_info->data = svm->nested.vm_cr_msr; |
eb6f302e | 3497 | break; |
c8a73f18 | 3498 | case MSR_IA32_UCODE_REV: |
609e36d3 | 3499 | msr_info->data = 0x01000065; |
c8a73f18 | 3500 | break; |
ae8b7875 BP |
3501 | case MSR_F15H_IC_CFG: { |
3502 | ||
3503 | int family, model; | |
3504 | ||
3505 | family = guest_cpuid_family(vcpu); | |
3506 | model = guest_cpuid_model(vcpu); | |
3507 | ||
3508 | if (family < 0 || model < 0) | |
3509 | return kvm_get_msr_common(vcpu, msr_info); | |
3510 | ||
3511 | msr_info->data = 0; | |
3512 | ||
3513 | if (family == 0x15 && | |
3514 | (model >= 0x2 && model < 0x20)) | |
3515 | msr_info->data = 0x1E; | |
3516 | } | |
3517 | break; | |
6aa8b732 | 3518 | default: |
609e36d3 | 3519 | return kvm_get_msr_common(vcpu, msr_info); |
6aa8b732 AK |
3520 | } |
3521 | return 0; | |
3522 | } | |
3523 | ||
851ba692 | 3524 | static int rdmsr_interception(struct vcpu_svm *svm) |
6aa8b732 | 3525 | { |
668f198f | 3526 | u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX); |
609e36d3 | 3527 | struct msr_data msr_info; |
6aa8b732 | 3528 | |
609e36d3 PB |
3529 | msr_info.index = ecx; |
3530 | msr_info.host_initiated = false; | |
3531 | if (svm_get_msr(&svm->vcpu, &msr_info)) { | |
59200273 | 3532 | trace_kvm_msr_read_ex(ecx); |
c1a5d4f9 | 3533 | kvm_inject_gp(&svm->vcpu, 0); |
59200273 | 3534 | } else { |
609e36d3 | 3535 | trace_kvm_msr_read(ecx, msr_info.data); |
af9ca2d7 | 3536 | |
609e36d3 PB |
3537 | kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, |
3538 | msr_info.data & 0xffffffff); | |
3539 | kvm_register_write(&svm->vcpu, VCPU_REGS_RDX, | |
3540 | msr_info.data >> 32); | |
5fdbf976 | 3541 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
e756fc62 | 3542 | skip_emulated_instruction(&svm->vcpu); |
6aa8b732 AK |
3543 | } |
3544 | return 1; | |
3545 | } | |
3546 | ||
4a810181 JR |
3547 | static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data) |
3548 | { | |
3549 | struct vcpu_svm *svm = to_svm(vcpu); | |
3550 | int svm_dis, chg_mask; | |
3551 | ||
3552 | if (data & ~SVM_VM_CR_VALID_MASK) | |
3553 | return 1; | |
3554 | ||
3555 | chg_mask = SVM_VM_CR_VALID_MASK; | |
3556 | ||
3557 | if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK) | |
3558 | chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK); | |
3559 | ||
3560 | svm->nested.vm_cr_msr &= ~chg_mask; | |
3561 | svm->nested.vm_cr_msr |= (data & chg_mask); | |
3562 | ||
3563 | svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK; | |
3564 | ||
3565 | /* check for svm_disable while efer.svme is set */ | |
3566 | if (svm_dis && (vcpu->arch.efer & EFER_SVME)) | |
3567 | return 1; | |
3568 | ||
3569 | return 0; | |
3570 | } | |
3571 | ||
8fe8ab46 | 3572 | static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
6aa8b732 | 3573 | { |
a2fa3e9f GH |
3574 | struct vcpu_svm *svm = to_svm(vcpu); |
3575 | ||
8fe8ab46 WA |
3576 | u32 ecx = msr->index; |
3577 | u64 data = msr->data; | |
6aa8b732 | 3578 | switch (ecx) { |
f4e1b3c8 | 3579 | case MSR_IA32_TSC: |
8fe8ab46 | 3580 | kvm_write_tsc(vcpu, msr); |
6aa8b732 | 3581 | break; |
8c06585d | 3582 | case MSR_STAR: |
a2fa3e9f | 3583 | svm->vmcb->save.star = data; |
6aa8b732 | 3584 | break; |
49b14f24 | 3585 | #ifdef CONFIG_X86_64 |
6aa8b732 | 3586 | case MSR_LSTAR: |
a2fa3e9f | 3587 | svm->vmcb->save.lstar = data; |
6aa8b732 AK |
3588 | break; |
3589 | case MSR_CSTAR: | |
a2fa3e9f | 3590 | svm->vmcb->save.cstar = data; |
6aa8b732 AK |
3591 | break; |
3592 | case MSR_KERNEL_GS_BASE: | |
a2fa3e9f | 3593 | svm->vmcb->save.kernel_gs_base = data; |
6aa8b732 AK |
3594 | break; |
3595 | case MSR_SYSCALL_MASK: | |
a2fa3e9f | 3596 | svm->vmcb->save.sfmask = data; |
6aa8b732 AK |
3597 | break; |
3598 | #endif | |
3599 | case MSR_IA32_SYSENTER_CS: | |
a2fa3e9f | 3600 | svm->vmcb->save.sysenter_cs = data; |
6aa8b732 AK |
3601 | break; |
3602 | case MSR_IA32_SYSENTER_EIP: | |
017cb99e | 3603 | svm->sysenter_eip = data; |
a2fa3e9f | 3604 | svm->vmcb->save.sysenter_eip = data; |
6aa8b732 AK |
3605 | break; |
3606 | case MSR_IA32_SYSENTER_ESP: | |
017cb99e | 3607 | svm->sysenter_esp = data; |
a2fa3e9f | 3608 | svm->vmcb->save.sysenter_esp = data; |
6aa8b732 | 3609 | break; |
46896c73 PB |
3610 | case MSR_TSC_AUX: |
3611 | if (!boot_cpu_has(X86_FEATURE_RDTSCP)) | |
3612 | return 1; | |
3613 | ||
3614 | /* | |
3615 | * This is rare, so we update the MSR here instead of using | |
3616 | * direct_access_msrs. Doing that would require a rdmsr in | |
3617 | * svm_vcpu_put. | |
3618 | */ | |
3619 | svm->tsc_aux = data; | |
3620 | wrmsrl(MSR_TSC_AUX, svm->tsc_aux); | |
3621 | break; | |
a2938c80 | 3622 | case MSR_IA32_DEBUGCTLMSR: |
2a6b20b8 | 3623 | if (!boot_cpu_has(X86_FEATURE_LBRV)) { |
a737f256 CD |
3624 | vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n", |
3625 | __func__, data); | |
24e09cbf JR |
3626 | break; |
3627 | } | |
3628 | if (data & DEBUGCTL_RESERVED_BITS) | |
3629 | return 1; | |
3630 | ||
3631 | svm->vmcb->save.dbgctl = data; | |
b53ba3f9 | 3632 | mark_dirty(svm->vmcb, VMCB_LBR); |
24e09cbf JR |
3633 | if (data & (1ULL<<0)) |
3634 | svm_enable_lbrv(svm); | |
3635 | else | |
3636 | svm_disable_lbrv(svm); | |
a2938c80 | 3637 | break; |
b286d5d8 | 3638 | case MSR_VM_HSAVE_PA: |
e6aa9abd | 3639 | svm->nested.hsave_msr = data; |
62b9abaa | 3640 | break; |
3c5d0a44 | 3641 | case MSR_VM_CR: |
4a810181 | 3642 | return svm_set_vm_cr(vcpu, data); |
3c5d0a44 | 3643 | case MSR_VM_IGNNE: |
a737f256 | 3644 | vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data); |
3c5d0a44 | 3645 | break; |
44a95dae SS |
3646 | case MSR_IA32_APICBASE: |
3647 | if (kvm_vcpu_apicv_active(vcpu)) | |
3648 | avic_update_vapic_bar(to_svm(vcpu), data); | |
3649 | /* Follow through */ | |
6aa8b732 | 3650 | default: |
8fe8ab46 | 3651 | return kvm_set_msr_common(vcpu, msr); |
6aa8b732 AK |
3652 | } |
3653 | return 0; | |
3654 | } | |
3655 | ||
851ba692 | 3656 | static int wrmsr_interception(struct vcpu_svm *svm) |
6aa8b732 | 3657 | { |
8fe8ab46 | 3658 | struct msr_data msr; |
668f198f DK |
3659 | u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX); |
3660 | u64 data = kvm_read_edx_eax(&svm->vcpu); | |
af9ca2d7 | 3661 | |
8fe8ab46 WA |
3662 | msr.data = data; |
3663 | msr.index = ecx; | |
3664 | msr.host_initiated = false; | |
af9ca2d7 | 3665 | |
5fdbf976 | 3666 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
854e8bb1 | 3667 | if (kvm_set_msr(&svm->vcpu, &msr)) { |
59200273 | 3668 | trace_kvm_msr_write_ex(ecx, data); |
c1a5d4f9 | 3669 | kvm_inject_gp(&svm->vcpu, 0); |
59200273 AK |
3670 | } else { |
3671 | trace_kvm_msr_write(ecx, data); | |
e756fc62 | 3672 | skip_emulated_instruction(&svm->vcpu); |
59200273 | 3673 | } |
6aa8b732 AK |
3674 | return 1; |
3675 | } | |
3676 | ||
851ba692 | 3677 | static int msr_interception(struct vcpu_svm *svm) |
6aa8b732 | 3678 | { |
e756fc62 | 3679 | if (svm->vmcb->control.exit_info_1) |
851ba692 | 3680 | return wrmsr_interception(svm); |
6aa8b732 | 3681 | else |
851ba692 | 3682 | return rdmsr_interception(svm); |
6aa8b732 AK |
3683 | } |
3684 | ||
851ba692 | 3685 | static int interrupt_window_interception(struct vcpu_svm *svm) |
c1150d8c | 3686 | { |
3842d135 | 3687 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
f0b85051 | 3688 | svm_clear_vintr(svm); |
85f455f7 | 3689 | svm->vmcb->control.int_ctl &= ~V_IRQ_MASK; |
decdbf6a | 3690 | mark_dirty(svm->vmcb, VMCB_INTR); |
675acb75 | 3691 | ++svm->vcpu.stat.irq_window_exits; |
c1150d8c DL |
3692 | return 1; |
3693 | } | |
3694 | ||
565d0998 ML |
3695 | static int pause_interception(struct vcpu_svm *svm) |
3696 | { | |
3697 | kvm_vcpu_on_spin(&(svm->vcpu)); | |
3698 | return 1; | |
3699 | } | |
3700 | ||
87c00572 GS |
3701 | static int nop_interception(struct vcpu_svm *svm) |
3702 | { | |
3703 | skip_emulated_instruction(&(svm->vcpu)); | |
3704 | return 1; | |
3705 | } | |
3706 | ||
3707 | static int monitor_interception(struct vcpu_svm *svm) | |
3708 | { | |
3709 | printk_once(KERN_WARNING "kvm: MONITOR instruction emulated as NOP!\n"); | |
3710 | return nop_interception(svm); | |
3711 | } | |
3712 | ||
3713 | static int mwait_interception(struct vcpu_svm *svm) | |
3714 | { | |
3715 | printk_once(KERN_WARNING "kvm: MWAIT instruction emulated as NOP!\n"); | |
3716 | return nop_interception(svm); | |
3717 | } | |
3718 | ||
18f40c53 SS |
3719 | enum avic_ipi_failure_cause { |
3720 | AVIC_IPI_FAILURE_INVALID_INT_TYPE, | |
3721 | AVIC_IPI_FAILURE_TARGET_NOT_RUNNING, | |
3722 | AVIC_IPI_FAILURE_INVALID_TARGET, | |
3723 | AVIC_IPI_FAILURE_INVALID_BACKING_PAGE, | |
3724 | }; | |
3725 | ||
3726 | static int avic_incomplete_ipi_interception(struct vcpu_svm *svm) | |
3727 | { | |
3728 | u32 icrh = svm->vmcb->control.exit_info_1 >> 32; | |
3729 | u32 icrl = svm->vmcb->control.exit_info_1; | |
3730 | u32 id = svm->vmcb->control.exit_info_2 >> 32; | |
5446a979 | 3731 | u32 index = svm->vmcb->control.exit_info_2 & 0xFF; |
18f40c53 SS |
3732 | struct kvm_lapic *apic = svm->vcpu.arch.apic; |
3733 | ||
3734 | trace_kvm_avic_incomplete_ipi(svm->vcpu.vcpu_id, icrh, icrl, id, index); | |
3735 | ||
3736 | switch (id) { | |
3737 | case AVIC_IPI_FAILURE_INVALID_INT_TYPE: | |
3738 | /* | |
3739 | * AVIC hardware handles the generation of | |
3740 | * IPIs when the specified Message Type is Fixed | |
3741 | * (also known as fixed delivery mode) and | |
3742 | * the Trigger Mode is edge-triggered. The hardware | |
3743 | * also supports self and broadcast delivery modes | |
3744 | * specified via the Destination Shorthand(DSH) | |
3745 | * field of the ICRL. Logical and physical APIC ID | |
3746 | * formats are supported. All other IPI types cause | |
3747 | * a #VMEXIT, which needs to emulated. | |
3748 | */ | |
3749 | kvm_lapic_reg_write(apic, APIC_ICR2, icrh); | |
3750 | kvm_lapic_reg_write(apic, APIC_ICR, icrl); | |
3751 | break; | |
3752 | case AVIC_IPI_FAILURE_TARGET_NOT_RUNNING: { | |
3753 | int i; | |
3754 | struct kvm_vcpu *vcpu; | |
3755 | struct kvm *kvm = svm->vcpu.kvm; | |
3756 | struct kvm_lapic *apic = svm->vcpu.arch.apic; | |
3757 | ||
3758 | /* | |
3759 | * At this point, we expect that the AVIC HW has already | |
3760 | * set the appropriate IRR bits on the valid target | |
3761 | * vcpus. So, we just need to kick the appropriate vcpu. | |
3762 | */ | |
3763 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
3764 | bool m = kvm_apic_match_dest(vcpu, apic, | |
3765 | icrl & KVM_APIC_SHORT_MASK, | |
3766 | GET_APIC_DEST_FIELD(icrh), | |
3767 | icrl & KVM_APIC_DEST_MASK); | |
3768 | ||
3769 | if (m && !avic_vcpu_is_running(vcpu)) | |
3770 | kvm_vcpu_wake_up(vcpu); | |
3771 | } | |
3772 | break; | |
3773 | } | |
3774 | case AVIC_IPI_FAILURE_INVALID_TARGET: | |
3775 | break; | |
3776 | case AVIC_IPI_FAILURE_INVALID_BACKING_PAGE: | |
3777 | WARN_ONCE(1, "Invalid backing page\n"); | |
3778 | break; | |
3779 | default: | |
3780 | pr_err("Unknown IPI interception\n"); | |
3781 | } | |
3782 | ||
3783 | return 1; | |
3784 | } | |
3785 | ||
3786 | static u32 *avic_get_logical_id_entry(struct kvm_vcpu *vcpu, u32 ldr, bool flat) | |
3787 | { | |
3788 | struct kvm_arch *vm_data = &vcpu->kvm->arch; | |
3789 | int index; | |
3790 | u32 *logical_apic_id_table; | |
3791 | int dlid = GET_APIC_LOGICAL_ID(ldr); | |
3792 | ||
3793 | if (!dlid) | |
3794 | return NULL; | |
3795 | ||
3796 | if (flat) { /* flat */ | |
3797 | index = ffs(dlid) - 1; | |
3798 | if (index > 7) | |
3799 | return NULL; | |
3800 | } else { /* cluster */ | |
3801 | int cluster = (dlid & 0xf0) >> 4; | |
3802 | int apic = ffs(dlid & 0x0f) - 1; | |
3803 | ||
3804 | if ((apic < 0) || (apic > 7) || | |
3805 | (cluster >= 0xf)) | |
3806 | return NULL; | |
3807 | index = (cluster << 2) + apic; | |
3808 | } | |
3809 | ||
3810 | logical_apic_id_table = (u32 *) page_address(vm_data->avic_logical_id_table_page); | |
3811 | ||
3812 | return &logical_apic_id_table[index]; | |
3813 | } | |
3814 | ||
3815 | static int avic_ldr_write(struct kvm_vcpu *vcpu, u8 g_physical_id, u32 ldr, | |
3816 | bool valid) | |
3817 | { | |
3818 | bool flat; | |
3819 | u32 *entry, new_entry; | |
3820 | ||
3821 | flat = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR) == APIC_DFR_FLAT; | |
3822 | entry = avic_get_logical_id_entry(vcpu, ldr, flat); | |
3823 | if (!entry) | |
3824 | return -EINVAL; | |
3825 | ||
3826 | new_entry = READ_ONCE(*entry); | |
3827 | new_entry &= ~AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK; | |
3828 | new_entry |= (g_physical_id & AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK); | |
3829 | if (valid) | |
3830 | new_entry |= AVIC_LOGICAL_ID_ENTRY_VALID_MASK; | |
3831 | else | |
3832 | new_entry &= ~AVIC_LOGICAL_ID_ENTRY_VALID_MASK; | |
3833 | WRITE_ONCE(*entry, new_entry); | |
3834 | ||
3835 | return 0; | |
3836 | } | |
3837 | ||
3838 | static int avic_handle_ldr_update(struct kvm_vcpu *vcpu) | |
3839 | { | |
3840 | int ret; | |
3841 | struct vcpu_svm *svm = to_svm(vcpu); | |
3842 | u32 ldr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_LDR); | |
3843 | ||
3844 | if (!ldr) | |
3845 | return 1; | |
3846 | ||
3847 | ret = avic_ldr_write(vcpu, vcpu->vcpu_id, ldr, true); | |
3848 | if (ret && svm->ldr_reg) { | |
3849 | avic_ldr_write(vcpu, 0, svm->ldr_reg, false); | |
3850 | svm->ldr_reg = 0; | |
3851 | } else { | |
3852 | svm->ldr_reg = ldr; | |
3853 | } | |
3854 | return ret; | |
3855 | } | |
3856 | ||
3857 | static int avic_handle_apic_id_update(struct kvm_vcpu *vcpu) | |
3858 | { | |
3859 | u64 *old, *new; | |
3860 | struct vcpu_svm *svm = to_svm(vcpu); | |
3861 | u32 apic_id_reg = kvm_lapic_get_reg(vcpu->arch.apic, APIC_ID); | |
3862 | u32 id = (apic_id_reg >> 24) & 0xff; | |
3863 | ||
3864 | if (vcpu->vcpu_id == id) | |
3865 | return 0; | |
3866 | ||
3867 | old = avic_get_physical_id_entry(vcpu, vcpu->vcpu_id); | |
3868 | new = avic_get_physical_id_entry(vcpu, id); | |
3869 | if (!new || !old) | |
3870 | return 1; | |
3871 | ||
3872 | /* We need to move physical_id_entry to new offset */ | |
3873 | *new = *old; | |
3874 | *old = 0ULL; | |
3875 | to_svm(vcpu)->avic_physical_id_cache = new; | |
3876 | ||
3877 | /* | |
3878 | * Also update the guest physical APIC ID in the logical | |
3879 | * APIC ID table entry if already setup the LDR. | |
3880 | */ | |
3881 | if (svm->ldr_reg) | |
3882 | avic_handle_ldr_update(vcpu); | |
3883 | ||
3884 | return 0; | |
3885 | } | |
3886 | ||
3887 | static int avic_handle_dfr_update(struct kvm_vcpu *vcpu) | |
3888 | { | |
3889 | struct vcpu_svm *svm = to_svm(vcpu); | |
3890 | struct kvm_arch *vm_data = &vcpu->kvm->arch; | |
3891 | u32 dfr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR); | |
3892 | u32 mod = (dfr >> 28) & 0xf; | |
3893 | ||
3894 | /* | |
3895 | * We assume that all local APICs are using the same type. | |
3896 | * If this changes, we need to flush the AVIC logical | |
3897 | * APID id table. | |
3898 | */ | |
3899 | if (vm_data->ldr_mode == mod) | |
3900 | return 0; | |
3901 | ||
3902 | clear_page(page_address(vm_data->avic_logical_id_table_page)); | |
3903 | vm_data->ldr_mode = mod; | |
3904 | ||
3905 | if (svm->ldr_reg) | |
3906 | avic_handle_ldr_update(vcpu); | |
3907 | return 0; | |
3908 | } | |
3909 | ||
3910 | static int avic_unaccel_trap_write(struct vcpu_svm *svm) | |
3911 | { | |
3912 | struct kvm_lapic *apic = svm->vcpu.arch.apic; | |
3913 | u32 offset = svm->vmcb->control.exit_info_1 & | |
3914 | AVIC_UNACCEL_ACCESS_OFFSET_MASK; | |
3915 | ||
3916 | switch (offset) { | |
3917 | case APIC_ID: | |
3918 | if (avic_handle_apic_id_update(&svm->vcpu)) | |
3919 | return 0; | |
3920 | break; | |
3921 | case APIC_LDR: | |
3922 | if (avic_handle_ldr_update(&svm->vcpu)) | |
3923 | return 0; | |
3924 | break; | |
3925 | case APIC_DFR: | |
3926 | avic_handle_dfr_update(&svm->vcpu); | |
3927 | break; | |
3928 | default: | |
3929 | break; | |
3930 | } | |
3931 | ||
3932 | kvm_lapic_reg_write(apic, offset, kvm_lapic_get_reg(apic, offset)); | |
3933 | ||
3934 | return 1; | |
3935 | } | |
3936 | ||
3937 | static bool is_avic_unaccelerated_access_trap(u32 offset) | |
3938 | { | |
3939 | bool ret = false; | |
3940 | ||
3941 | switch (offset) { | |
3942 | case APIC_ID: | |
3943 | case APIC_EOI: | |
3944 | case APIC_RRR: | |
3945 | case APIC_LDR: | |
3946 | case APIC_DFR: | |
3947 | case APIC_SPIV: | |
3948 | case APIC_ESR: | |
3949 | case APIC_ICR: | |
3950 | case APIC_LVTT: | |
3951 | case APIC_LVTTHMR: | |
3952 | case APIC_LVTPC: | |
3953 | case APIC_LVT0: | |
3954 | case APIC_LVT1: | |
3955 | case APIC_LVTERR: | |
3956 | case APIC_TMICT: | |
3957 | case APIC_TDCR: | |
3958 | ret = true; | |
3959 | break; | |
3960 | default: | |
3961 | break; | |
3962 | } | |
3963 | return ret; | |
3964 | } | |
3965 | ||
3966 | static int avic_unaccelerated_access_interception(struct vcpu_svm *svm) | |
3967 | { | |
3968 | int ret = 0; | |
3969 | u32 offset = svm->vmcb->control.exit_info_1 & | |
3970 | AVIC_UNACCEL_ACCESS_OFFSET_MASK; | |
3971 | u32 vector = svm->vmcb->control.exit_info_2 & | |
3972 | AVIC_UNACCEL_ACCESS_VECTOR_MASK; | |
3973 | bool write = (svm->vmcb->control.exit_info_1 >> 32) & | |
3974 | AVIC_UNACCEL_ACCESS_WRITE_MASK; | |
3975 | bool trap = is_avic_unaccelerated_access_trap(offset); | |
3976 | ||
3977 | trace_kvm_avic_unaccelerated_access(svm->vcpu.vcpu_id, offset, | |
3978 | trap, write, vector); | |
3979 | if (trap) { | |
3980 | /* Handling Trap */ | |
3981 | WARN_ONCE(!write, "svm: Handling trap read.\n"); | |
3982 | ret = avic_unaccel_trap_write(svm); | |
3983 | } else { | |
3984 | /* Handling Fault */ | |
3985 | ret = (emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE); | |
3986 | } | |
3987 | ||
3988 | return ret; | |
3989 | } | |
3990 | ||
09941fbb | 3991 | static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = { |
7ff76d58 AP |
3992 | [SVM_EXIT_READ_CR0] = cr_interception, |
3993 | [SVM_EXIT_READ_CR3] = cr_interception, | |
3994 | [SVM_EXIT_READ_CR4] = cr_interception, | |
3995 | [SVM_EXIT_READ_CR8] = cr_interception, | |
5e57518d | 3996 | [SVM_EXIT_CR0_SEL_WRITE] = cr_interception, |
628afd2a | 3997 | [SVM_EXIT_WRITE_CR0] = cr_interception, |
7ff76d58 AP |
3998 | [SVM_EXIT_WRITE_CR3] = cr_interception, |
3999 | [SVM_EXIT_WRITE_CR4] = cr_interception, | |
e0231715 | 4000 | [SVM_EXIT_WRITE_CR8] = cr8_write_interception, |
cae3797a AP |
4001 | [SVM_EXIT_READ_DR0] = dr_interception, |
4002 | [SVM_EXIT_READ_DR1] = dr_interception, | |
4003 | [SVM_EXIT_READ_DR2] = dr_interception, | |
4004 | [SVM_EXIT_READ_DR3] = dr_interception, | |
4005 | [SVM_EXIT_READ_DR4] = dr_interception, | |
4006 | [SVM_EXIT_READ_DR5] = dr_interception, | |
4007 | [SVM_EXIT_READ_DR6] = dr_interception, | |
4008 | [SVM_EXIT_READ_DR7] = dr_interception, | |
4009 | [SVM_EXIT_WRITE_DR0] = dr_interception, | |
4010 | [SVM_EXIT_WRITE_DR1] = dr_interception, | |
4011 | [SVM_EXIT_WRITE_DR2] = dr_interception, | |
4012 | [SVM_EXIT_WRITE_DR3] = dr_interception, | |
4013 | [SVM_EXIT_WRITE_DR4] = dr_interception, | |
4014 | [SVM_EXIT_WRITE_DR5] = dr_interception, | |
4015 | [SVM_EXIT_WRITE_DR6] = dr_interception, | |
4016 | [SVM_EXIT_WRITE_DR7] = dr_interception, | |
d0bfb940 JK |
4017 | [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception, |
4018 | [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception, | |
7aa81cc0 | 4019 | [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception, |
e0231715 JR |
4020 | [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception, |
4021 | [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception, | |
4022 | [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception, | |
54a20552 | 4023 | [SVM_EXIT_EXCP_BASE + AC_VECTOR] = ac_interception, |
e0231715 | 4024 | [SVM_EXIT_INTR] = intr_interception, |
c47f098d | 4025 | [SVM_EXIT_NMI] = nmi_interception, |
6aa8b732 AK |
4026 | [SVM_EXIT_SMI] = nop_on_interception, |
4027 | [SVM_EXIT_INIT] = nop_on_interception, | |
c1150d8c | 4028 | [SVM_EXIT_VINTR] = interrupt_window_interception, |
332b56e4 | 4029 | [SVM_EXIT_RDPMC] = rdpmc_interception, |
6aa8b732 | 4030 | [SVM_EXIT_CPUID] = cpuid_interception, |
95ba8273 | 4031 | [SVM_EXIT_IRET] = iret_interception, |
cf5a94d1 | 4032 | [SVM_EXIT_INVD] = emulate_on_interception, |
565d0998 | 4033 | [SVM_EXIT_PAUSE] = pause_interception, |
6aa8b732 | 4034 | [SVM_EXIT_HLT] = halt_interception, |
a7052897 | 4035 | [SVM_EXIT_INVLPG] = invlpg_interception, |
ff092385 | 4036 | [SVM_EXIT_INVLPGA] = invlpga_interception, |
e0231715 | 4037 | [SVM_EXIT_IOIO] = io_interception, |
6aa8b732 AK |
4038 | [SVM_EXIT_MSR] = msr_interception, |
4039 | [SVM_EXIT_TASK_SWITCH] = task_switch_interception, | |
46fe4ddd | 4040 | [SVM_EXIT_SHUTDOWN] = shutdown_interception, |
3d6368ef | 4041 | [SVM_EXIT_VMRUN] = vmrun_interception, |
02e235bc | 4042 | [SVM_EXIT_VMMCALL] = vmmcall_interception, |
5542675b AG |
4043 | [SVM_EXIT_VMLOAD] = vmload_interception, |
4044 | [SVM_EXIT_VMSAVE] = vmsave_interception, | |
1371d904 AG |
4045 | [SVM_EXIT_STGI] = stgi_interception, |
4046 | [SVM_EXIT_CLGI] = clgi_interception, | |
532a46b9 | 4047 | [SVM_EXIT_SKINIT] = skinit_interception, |
dab429a7 | 4048 | [SVM_EXIT_WBINVD] = wbinvd_interception, |
87c00572 GS |
4049 | [SVM_EXIT_MONITOR] = monitor_interception, |
4050 | [SVM_EXIT_MWAIT] = mwait_interception, | |
81dd35d4 | 4051 | [SVM_EXIT_XSETBV] = xsetbv_interception, |
709ddebf | 4052 | [SVM_EXIT_NPF] = pf_interception, |
64d60670 | 4053 | [SVM_EXIT_RSM] = emulate_on_interception, |
18f40c53 SS |
4054 | [SVM_EXIT_AVIC_INCOMPLETE_IPI] = avic_incomplete_ipi_interception, |
4055 | [SVM_EXIT_AVIC_UNACCELERATED_ACCESS] = avic_unaccelerated_access_interception, | |
6aa8b732 AK |
4056 | }; |
4057 | ||
ae8cc059 | 4058 | static void dump_vmcb(struct kvm_vcpu *vcpu) |
3f10c846 JR |
4059 | { |
4060 | struct vcpu_svm *svm = to_svm(vcpu); | |
4061 | struct vmcb_control_area *control = &svm->vmcb->control; | |
4062 | struct vmcb_save_area *save = &svm->vmcb->save; | |
4063 | ||
4064 | pr_err("VMCB Control Area:\n"); | |
ae8cc059 JP |
4065 | pr_err("%-20s%04x\n", "cr_read:", control->intercept_cr & 0xffff); |
4066 | pr_err("%-20s%04x\n", "cr_write:", control->intercept_cr >> 16); | |
4067 | pr_err("%-20s%04x\n", "dr_read:", control->intercept_dr & 0xffff); | |
4068 | pr_err("%-20s%04x\n", "dr_write:", control->intercept_dr >> 16); | |
4069 | pr_err("%-20s%08x\n", "exceptions:", control->intercept_exceptions); | |
4070 | pr_err("%-20s%016llx\n", "intercepts:", control->intercept); | |
4071 | pr_err("%-20s%d\n", "pause filter count:", control->pause_filter_count); | |
4072 | pr_err("%-20s%016llx\n", "iopm_base_pa:", control->iopm_base_pa); | |
4073 | pr_err("%-20s%016llx\n", "msrpm_base_pa:", control->msrpm_base_pa); | |
4074 | pr_err("%-20s%016llx\n", "tsc_offset:", control->tsc_offset); | |
4075 | pr_err("%-20s%d\n", "asid:", control->asid); | |
4076 | pr_err("%-20s%d\n", "tlb_ctl:", control->tlb_ctl); | |
4077 | pr_err("%-20s%08x\n", "int_ctl:", control->int_ctl); | |
4078 | pr_err("%-20s%08x\n", "int_vector:", control->int_vector); | |
4079 | pr_err("%-20s%08x\n", "int_state:", control->int_state); | |
4080 | pr_err("%-20s%08x\n", "exit_code:", control->exit_code); | |
4081 | pr_err("%-20s%016llx\n", "exit_info1:", control->exit_info_1); | |
4082 | pr_err("%-20s%016llx\n", "exit_info2:", control->exit_info_2); | |
4083 | pr_err("%-20s%08x\n", "exit_int_info:", control->exit_int_info); | |
4084 | pr_err("%-20s%08x\n", "exit_int_info_err:", control->exit_int_info_err); | |
4085 | pr_err("%-20s%lld\n", "nested_ctl:", control->nested_ctl); | |
4086 | pr_err("%-20s%016llx\n", "nested_cr3:", control->nested_cr3); | |
44a95dae | 4087 | pr_err("%-20s%016llx\n", "avic_vapic_bar:", control->avic_vapic_bar); |
ae8cc059 JP |
4088 | pr_err("%-20s%08x\n", "event_inj:", control->event_inj); |
4089 | pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err); | |
4090 | pr_err("%-20s%lld\n", "lbr_ctl:", control->lbr_ctl); | |
4091 | pr_err("%-20s%016llx\n", "next_rip:", control->next_rip); | |
44a95dae SS |
4092 | pr_err("%-20s%016llx\n", "avic_backing_page:", control->avic_backing_page); |
4093 | pr_err("%-20s%016llx\n", "avic_logical_id:", control->avic_logical_id); | |
4094 | pr_err("%-20s%016llx\n", "avic_physical_id:", control->avic_physical_id); | |
3f10c846 | 4095 | pr_err("VMCB State Save Area:\n"); |
ae8cc059 JP |
4096 | pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n", |
4097 | "es:", | |
4098 | save->es.selector, save->es.attrib, | |
4099 | save->es.limit, save->es.base); | |
4100 | pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n", | |
4101 | "cs:", | |
4102 | save->cs.selector, save->cs.attrib, | |
4103 | save->cs.limit, save->cs.base); | |
4104 | pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n", | |
4105 | "ss:", | |
4106 | save->ss.selector, save->ss.attrib, | |
4107 | save->ss.limit, save->ss.base); | |
4108 | pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n", | |
4109 | "ds:", | |
4110 | save->ds.selector, save->ds.attrib, | |
4111 | save->ds.limit, save->ds.base); | |
4112 | pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n", | |
4113 | "fs:", | |
4114 | save->fs.selector, save->fs.attrib, | |
4115 | save->fs.limit, save->fs.base); | |
4116 | pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n", | |
4117 | "gs:", | |
4118 | save->gs.selector, save->gs.attrib, | |
4119 | save->gs.limit, save->gs.base); | |
4120 | pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n", | |
4121 | "gdtr:", | |
4122 | save->gdtr.selector, save->gdtr.attrib, | |
4123 | save->gdtr.limit, save->gdtr.base); | |
4124 | pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n", | |
4125 | "ldtr:", | |
4126 | save->ldtr.selector, save->ldtr.attrib, | |
4127 | save->ldtr.limit, save->ldtr.base); | |
4128 | pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n", | |
4129 | "idtr:", | |
4130 | save->idtr.selector, save->idtr.attrib, | |
4131 | save->idtr.limit, save->idtr.base); | |
4132 | pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n", | |
4133 | "tr:", | |
4134 | save->tr.selector, save->tr.attrib, | |
4135 | save->tr.limit, save->tr.base); | |
3f10c846 JR |
4136 | pr_err("cpl: %d efer: %016llx\n", |
4137 | save->cpl, save->efer); | |
ae8cc059 JP |
4138 | pr_err("%-15s %016llx %-13s %016llx\n", |
4139 | "cr0:", save->cr0, "cr2:", save->cr2); | |
4140 | pr_err("%-15s %016llx %-13s %016llx\n", | |
4141 | "cr3:", save->cr3, "cr4:", save->cr4); | |
4142 | pr_err("%-15s %016llx %-13s %016llx\n", | |
4143 | "dr6:", save->dr6, "dr7:", save->dr7); | |
4144 | pr_err("%-15s %016llx %-13s %016llx\n", | |
4145 | "rip:", save->rip, "rflags:", save->rflags); | |
4146 | pr_err("%-15s %016llx %-13s %016llx\n", | |
4147 | "rsp:", save->rsp, "rax:", save->rax); | |
4148 | pr_err("%-15s %016llx %-13s %016llx\n", | |
4149 | "star:", save->star, "lstar:", save->lstar); | |
4150 | pr_err("%-15s %016llx %-13s %016llx\n", | |
4151 | "cstar:", save->cstar, "sfmask:", save->sfmask); | |
4152 | pr_err("%-15s %016llx %-13s %016llx\n", | |
4153 | "kernel_gs_base:", save->kernel_gs_base, | |
4154 | "sysenter_cs:", save->sysenter_cs); | |
4155 | pr_err("%-15s %016llx %-13s %016llx\n", | |
4156 | "sysenter_esp:", save->sysenter_esp, | |
4157 | "sysenter_eip:", save->sysenter_eip); | |
4158 | pr_err("%-15s %016llx %-13s %016llx\n", | |
4159 | "gpat:", save->g_pat, "dbgctl:", save->dbgctl); | |
4160 | pr_err("%-15s %016llx %-13s %016llx\n", | |
4161 | "br_from:", save->br_from, "br_to:", save->br_to); | |
4162 | pr_err("%-15s %016llx %-13s %016llx\n", | |
4163 | "excp_from:", save->last_excp_from, | |
4164 | "excp_to:", save->last_excp_to); | |
3f10c846 JR |
4165 | } |
4166 | ||
586f9607 AK |
4167 | static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2) |
4168 | { | |
4169 | struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control; | |
4170 | ||
4171 | *info1 = control->exit_info_1; | |
4172 | *info2 = control->exit_info_2; | |
4173 | } | |
4174 | ||
851ba692 | 4175 | static int handle_exit(struct kvm_vcpu *vcpu) |
6aa8b732 | 4176 | { |
04d2cc77 | 4177 | struct vcpu_svm *svm = to_svm(vcpu); |
851ba692 | 4178 | struct kvm_run *kvm_run = vcpu->run; |
a2fa3e9f | 4179 | u32 exit_code = svm->vmcb->control.exit_code; |
6aa8b732 | 4180 | |
8b89fe1f PB |
4181 | trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM); |
4182 | ||
0f89b207 TL |
4183 | vcpu->arch.gpa_available = (exit_code == SVM_EXIT_NPF); |
4184 | ||
4ee546b4 | 4185 | if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE)) |
2be4fc7a JR |
4186 | vcpu->arch.cr0 = svm->vmcb->save.cr0; |
4187 | if (npt_enabled) | |
4188 | vcpu->arch.cr3 = svm->vmcb->save.cr3; | |
af9ca2d7 | 4189 | |
cd3ff653 JR |
4190 | if (unlikely(svm->nested.exit_required)) { |
4191 | nested_svm_vmexit(svm); | |
4192 | svm->nested.exit_required = false; | |
4193 | ||
4194 | return 1; | |
4195 | } | |
4196 | ||
2030753d | 4197 | if (is_guest_mode(vcpu)) { |
410e4d57 JR |
4198 | int vmexit; |
4199 | ||
d8cabddf JR |
4200 | trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code, |
4201 | svm->vmcb->control.exit_info_1, | |
4202 | svm->vmcb->control.exit_info_2, | |
4203 | svm->vmcb->control.exit_int_info, | |
e097e5ff SH |
4204 | svm->vmcb->control.exit_int_info_err, |
4205 | KVM_ISA_SVM); | |
d8cabddf | 4206 | |
410e4d57 JR |
4207 | vmexit = nested_svm_exit_special(svm); |
4208 | ||
4209 | if (vmexit == NESTED_EXIT_CONTINUE) | |
4210 | vmexit = nested_svm_exit_handled(svm); | |
4211 | ||
4212 | if (vmexit == NESTED_EXIT_DONE) | |
cf74a78b | 4213 | return 1; |
cf74a78b AG |
4214 | } |
4215 | ||
a5c3832d JR |
4216 | svm_complete_interrupts(svm); |
4217 | ||
04d2cc77 AK |
4218 | if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) { |
4219 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
4220 | kvm_run->fail_entry.hardware_entry_failure_reason | |
4221 | = svm->vmcb->control.exit_code; | |
3f10c846 JR |
4222 | pr_err("KVM: FAILED VMRUN WITH VMCB:\n"); |
4223 | dump_vmcb(vcpu); | |
04d2cc77 AK |
4224 | return 0; |
4225 | } | |
4226 | ||
a2fa3e9f | 4227 | if (is_external_interrupt(svm->vmcb->control.exit_int_info) && |
709ddebf | 4228 | exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR && |
55c5e464 JR |
4229 | exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH && |
4230 | exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI) | |
6614c7d0 | 4231 | printk(KERN_ERR "%s: unexpected exit_int_info 0x%x " |
6aa8b732 | 4232 | "exit_code 0x%x\n", |
b8688d51 | 4233 | __func__, svm->vmcb->control.exit_int_info, |
6aa8b732 AK |
4234 | exit_code); |
4235 | ||
9d8f549d | 4236 | if (exit_code >= ARRAY_SIZE(svm_exit_handlers) |
56919c5c | 4237 | || !svm_exit_handlers[exit_code]) { |
faac2458 | 4238 | WARN_ONCE(1, "svm: unexpected exit reason 0x%x\n", exit_code); |
2bc19dc3 MT |
4239 | kvm_queue_exception(vcpu, UD_VECTOR); |
4240 | return 1; | |
6aa8b732 AK |
4241 | } |
4242 | ||
851ba692 | 4243 | return svm_exit_handlers[exit_code](svm); |
6aa8b732 AK |
4244 | } |
4245 | ||
4246 | static void reload_tss(struct kvm_vcpu *vcpu) | |
4247 | { | |
4248 | int cpu = raw_smp_processor_id(); | |
4249 | ||
0fe1e009 TH |
4250 | struct svm_cpu_data *sd = per_cpu(svm_data, cpu); |
4251 | sd->tss_desc->type = 9; /* available 32/64-bit TSS */ | |
6aa8b732 AK |
4252 | load_TR_desc(); |
4253 | } | |
4254 | ||
e756fc62 | 4255 | static void pre_svm_run(struct vcpu_svm *svm) |
6aa8b732 AK |
4256 | { |
4257 | int cpu = raw_smp_processor_id(); | |
4258 | ||
0fe1e009 | 4259 | struct svm_cpu_data *sd = per_cpu(svm_data, cpu); |
6aa8b732 | 4260 | |
4b656b12 | 4261 | /* FIXME: handle wraparound of asid_generation */ |
0fe1e009 TH |
4262 | if (svm->asid_generation != sd->asid_generation) |
4263 | new_asid(svm, sd); | |
6aa8b732 AK |
4264 | } |
4265 | ||
95ba8273 GN |
4266 | static void svm_inject_nmi(struct kvm_vcpu *vcpu) |
4267 | { | |
4268 | struct vcpu_svm *svm = to_svm(vcpu); | |
4269 | ||
4270 | svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI; | |
4271 | vcpu->arch.hflags |= HF_NMI_MASK; | |
8a05a1b8 | 4272 | set_intercept(svm, INTERCEPT_IRET); |
95ba8273 GN |
4273 | ++vcpu->stat.nmi_injections; |
4274 | } | |
6aa8b732 | 4275 | |
85f455f7 | 4276 | static inline void svm_inject_irq(struct vcpu_svm *svm, int irq) |
6aa8b732 AK |
4277 | { |
4278 | struct vmcb_control_area *control; | |
4279 | ||
340d3bc3 | 4280 | /* The following fields are ignored when AVIC is enabled */ |
e756fc62 | 4281 | control = &svm->vmcb->control; |
85f455f7 | 4282 | control->int_vector = irq; |
6aa8b732 AK |
4283 | control->int_ctl &= ~V_INTR_PRIO_MASK; |
4284 | control->int_ctl |= V_IRQ_MASK | | |
4285 | ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT); | |
decdbf6a | 4286 | mark_dirty(svm->vmcb, VMCB_INTR); |
6aa8b732 AK |
4287 | } |
4288 | ||
66fd3f7f | 4289 | static void svm_set_irq(struct kvm_vcpu *vcpu) |
2a8067f1 ED |
4290 | { |
4291 | struct vcpu_svm *svm = to_svm(vcpu); | |
4292 | ||
2af9194d | 4293 | BUG_ON(!(gif_set(svm))); |
cf74a78b | 4294 | |
9fb2d2b4 GN |
4295 | trace_kvm_inj_virq(vcpu->arch.interrupt.nr); |
4296 | ++vcpu->stat.irq_injections; | |
4297 | ||
219b65dc AG |
4298 | svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr | |
4299 | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR; | |
2a8067f1 ED |
4300 | } |
4301 | ||
3bbf3565 SS |
4302 | static inline bool svm_nested_virtualize_tpr(struct kvm_vcpu *vcpu) |
4303 | { | |
4304 | return is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK); | |
4305 | } | |
4306 | ||
95ba8273 | 4307 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) |
aaacfc9a JR |
4308 | { |
4309 | struct vcpu_svm *svm = to_svm(vcpu); | |
aaacfc9a | 4310 | |
3bbf3565 SS |
4311 | if (svm_nested_virtualize_tpr(vcpu) || |
4312 | kvm_vcpu_apicv_active(vcpu)) | |
88ab24ad JR |
4313 | return; |
4314 | ||
596f3142 RK |
4315 | clr_cr_intercept(svm, INTERCEPT_CR8_WRITE); |
4316 | ||
95ba8273 | 4317 | if (irr == -1) |
aaacfc9a JR |
4318 | return; |
4319 | ||
95ba8273 | 4320 | if (tpr >= irr) |
4ee546b4 | 4321 | set_cr_intercept(svm, INTERCEPT_CR8_WRITE); |
95ba8273 | 4322 | } |
aaacfc9a | 4323 | |
8d14695f YZ |
4324 | static void svm_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set) |
4325 | { | |
4326 | return; | |
4327 | } | |
4328 | ||
d62caabb AS |
4329 | static bool svm_get_enable_apicv(void) |
4330 | { | |
44a95dae SS |
4331 | return avic; |
4332 | } | |
4333 | ||
4334 | static void svm_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr) | |
4335 | { | |
d62caabb AS |
4336 | } |
4337 | ||
67c9dddc | 4338 | static void svm_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr) |
44a95dae | 4339 | { |
d62caabb AS |
4340 | } |
4341 | ||
44a95dae | 4342 | /* Note: Currently only used by Hyper-V. */ |
d62caabb | 4343 | static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu) |
c7c9c56c | 4344 | { |
44a95dae SS |
4345 | struct vcpu_svm *svm = to_svm(vcpu); |
4346 | struct vmcb *vmcb = svm->vmcb; | |
4347 | ||
4348 | if (!avic) | |
4349 | return; | |
4350 | ||
4351 | vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK; | |
4352 | mark_dirty(vmcb, VMCB_INTR); | |
c7c9c56c YZ |
4353 | } |
4354 | ||
6308630b | 4355 | static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) |
c7c9c56c YZ |
4356 | { |
4357 | return; | |
4358 | } | |
4359 | ||
340d3bc3 SS |
4360 | static void svm_deliver_avic_intr(struct kvm_vcpu *vcpu, int vec) |
4361 | { | |
4362 | kvm_lapic_set_irr(vec, vcpu->arch.apic); | |
4363 | smp_mb__after_atomic(); | |
4364 | ||
4365 | if (avic_vcpu_is_running(vcpu)) | |
4366 | wrmsrl(SVM_AVIC_DOORBELL, | |
7d669f50 | 4367 | kvm_cpu_get_apicid(vcpu->cpu)); |
340d3bc3 SS |
4368 | else |
4369 | kvm_vcpu_wake_up(vcpu); | |
4370 | } | |
4371 | ||
411b44ba SS |
4372 | static void svm_ir_list_del(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi) |
4373 | { | |
4374 | unsigned long flags; | |
4375 | struct amd_svm_iommu_ir *cur; | |
4376 | ||
4377 | spin_lock_irqsave(&svm->ir_list_lock, flags); | |
4378 | list_for_each_entry(cur, &svm->ir_list, node) { | |
4379 | if (cur->data != pi->ir_data) | |
4380 | continue; | |
4381 | list_del(&cur->node); | |
4382 | kfree(cur); | |
4383 | break; | |
4384 | } | |
4385 | spin_unlock_irqrestore(&svm->ir_list_lock, flags); | |
4386 | } | |
4387 | ||
4388 | static int svm_ir_list_add(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi) | |
4389 | { | |
4390 | int ret = 0; | |
4391 | unsigned long flags; | |
4392 | struct amd_svm_iommu_ir *ir; | |
4393 | ||
4394 | /** | |
4395 | * In some cases, the existing irte is updaed and re-set, | |
4396 | * so we need to check here if it's already been * added | |
4397 | * to the ir_list. | |
4398 | */ | |
4399 | if (pi->ir_data && (pi->prev_ga_tag != 0)) { | |
4400 | struct kvm *kvm = svm->vcpu.kvm; | |
4401 | u32 vcpu_id = AVIC_GATAG_TO_VCPUID(pi->prev_ga_tag); | |
4402 | struct kvm_vcpu *prev_vcpu = kvm_get_vcpu_by_id(kvm, vcpu_id); | |
4403 | struct vcpu_svm *prev_svm; | |
4404 | ||
4405 | if (!prev_vcpu) { | |
4406 | ret = -EINVAL; | |
4407 | goto out; | |
4408 | } | |
4409 | ||
4410 | prev_svm = to_svm(prev_vcpu); | |
4411 | svm_ir_list_del(prev_svm, pi); | |
4412 | } | |
4413 | ||
4414 | /** | |
4415 | * Allocating new amd_iommu_pi_data, which will get | |
4416 | * add to the per-vcpu ir_list. | |
4417 | */ | |
4418 | ir = kzalloc(sizeof(struct amd_svm_iommu_ir), GFP_KERNEL); | |
4419 | if (!ir) { | |
4420 | ret = -ENOMEM; | |
4421 | goto out; | |
4422 | } | |
4423 | ir->data = pi->ir_data; | |
4424 | ||
4425 | spin_lock_irqsave(&svm->ir_list_lock, flags); | |
4426 | list_add(&ir->node, &svm->ir_list); | |
4427 | spin_unlock_irqrestore(&svm->ir_list_lock, flags); | |
4428 | out: | |
4429 | return ret; | |
4430 | } | |
4431 | ||
4432 | /** | |
4433 | * Note: | |
4434 | * The HW cannot support posting multicast/broadcast | |
4435 | * interrupts to a vCPU. So, we still use legacy interrupt | |
4436 | * remapping for these kind of interrupts. | |
4437 | * | |
4438 | * For lowest-priority interrupts, we only support | |
4439 | * those with single CPU as the destination, e.g. user | |
4440 | * configures the interrupts via /proc/irq or uses | |
4441 | * irqbalance to make the interrupts single-CPU. | |
4442 | */ | |
4443 | static int | |
4444 | get_pi_vcpu_info(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e, | |
4445 | struct vcpu_data *vcpu_info, struct vcpu_svm **svm) | |
4446 | { | |
4447 | struct kvm_lapic_irq irq; | |
4448 | struct kvm_vcpu *vcpu = NULL; | |
4449 | ||
4450 | kvm_set_msi_irq(kvm, e, &irq); | |
4451 | ||
4452 | if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) { | |
4453 | pr_debug("SVM: %s: use legacy intr remap mode for irq %u\n", | |
4454 | __func__, irq.vector); | |
4455 | return -1; | |
4456 | } | |
4457 | ||
4458 | pr_debug("SVM: %s: use GA mode for irq %u\n", __func__, | |
4459 | irq.vector); | |
4460 | *svm = to_svm(vcpu); | |
4461 | vcpu_info->pi_desc_addr = page_to_phys((*svm)->avic_backing_page); | |
4462 | vcpu_info->vector = irq.vector; | |
4463 | ||
4464 | return 0; | |
4465 | } | |
4466 | ||
4467 | /* | |
4468 | * svm_update_pi_irte - set IRTE for Posted-Interrupts | |
4469 | * | |
4470 | * @kvm: kvm | |
4471 | * @host_irq: host irq of the interrupt | |
4472 | * @guest_irq: gsi of the interrupt | |
4473 | * @set: set or unset PI | |
4474 | * returns 0 on success, < 0 on failure | |
4475 | */ | |
4476 | static int svm_update_pi_irte(struct kvm *kvm, unsigned int host_irq, | |
4477 | uint32_t guest_irq, bool set) | |
4478 | { | |
4479 | struct kvm_kernel_irq_routing_entry *e; | |
4480 | struct kvm_irq_routing_table *irq_rt; | |
4481 | int idx, ret = -EINVAL; | |
4482 | ||
4483 | if (!kvm_arch_has_assigned_device(kvm) || | |
4484 | !irq_remapping_cap(IRQ_POSTING_CAP)) | |
4485 | return 0; | |
4486 | ||
4487 | pr_debug("SVM: %s: host_irq=%#x, guest_irq=%#x, set=%#x\n", | |
4488 | __func__, host_irq, guest_irq, set); | |
4489 | ||
4490 | idx = srcu_read_lock(&kvm->irq_srcu); | |
4491 | irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu); | |
4492 | WARN_ON(guest_irq >= irq_rt->nr_rt_entries); | |
4493 | ||
4494 | hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) { | |
4495 | struct vcpu_data vcpu_info; | |
4496 | struct vcpu_svm *svm = NULL; | |
4497 | ||
4498 | if (e->type != KVM_IRQ_ROUTING_MSI) | |
4499 | continue; | |
4500 | ||
4501 | /** | |
4502 | * Here, we setup with legacy mode in the following cases: | |
4503 | * 1. When cannot target interrupt to a specific vcpu. | |
4504 | * 2. Unsetting posted interrupt. | |
4505 | * 3. APIC virtialization is disabled for the vcpu. | |
4506 | */ | |
4507 | if (!get_pi_vcpu_info(kvm, e, &vcpu_info, &svm) && set && | |
4508 | kvm_vcpu_apicv_active(&svm->vcpu)) { | |
4509 | struct amd_iommu_pi_data pi; | |
4510 | ||
4511 | /* Try to enable guest_mode in IRTE */ | |
4512 | pi.base = page_to_phys(svm->avic_backing_page) & AVIC_HPA_MASK; | |
4513 | pi.ga_tag = AVIC_GATAG(kvm->arch.avic_vm_id, | |
4514 | svm->vcpu.vcpu_id); | |
4515 | pi.is_guest_mode = true; | |
4516 | pi.vcpu_data = &vcpu_info; | |
4517 | ret = irq_set_vcpu_affinity(host_irq, &pi); | |
4518 | ||
4519 | /** | |
4520 | * Here, we successfully setting up vcpu affinity in | |
4521 | * IOMMU guest mode. Now, we need to store the posted | |
4522 | * interrupt information in a per-vcpu ir_list so that | |
4523 | * we can reference to them directly when we update vcpu | |
4524 | * scheduling information in IOMMU irte. | |
4525 | */ | |
4526 | if (!ret && pi.is_guest_mode) | |
4527 | svm_ir_list_add(svm, &pi); | |
4528 | } else { | |
4529 | /* Use legacy mode in IRTE */ | |
4530 | struct amd_iommu_pi_data pi; | |
4531 | ||
4532 | /** | |
4533 | * Here, pi is used to: | |
4534 | * - Tell IOMMU to use legacy mode for this interrupt. | |
4535 | * - Retrieve ga_tag of prior interrupt remapping data. | |
4536 | */ | |
4537 | pi.is_guest_mode = false; | |
4538 | ret = irq_set_vcpu_affinity(host_irq, &pi); | |
4539 | ||
4540 | /** | |
4541 | * Check if the posted interrupt was previously | |
4542 | * setup with the guest_mode by checking if the ga_tag | |
4543 | * was cached. If so, we need to clean up the per-vcpu | |
4544 | * ir_list. | |
4545 | */ | |
4546 | if (!ret && pi.prev_ga_tag) { | |
4547 | int id = AVIC_GATAG_TO_VCPUID(pi.prev_ga_tag); | |
4548 | struct kvm_vcpu *vcpu; | |
4549 | ||
4550 | vcpu = kvm_get_vcpu_by_id(kvm, id); | |
4551 | if (vcpu) | |
4552 | svm_ir_list_del(to_svm(vcpu), &pi); | |
4553 | } | |
4554 | } | |
4555 | ||
4556 | if (!ret && svm) { | |
4557 | trace_kvm_pi_irte_update(svm->vcpu.vcpu_id, | |
4558 | host_irq, e->gsi, | |
4559 | vcpu_info.vector, | |
4560 | vcpu_info.pi_desc_addr, set); | |
4561 | } | |
4562 | ||
4563 | if (ret < 0) { | |
4564 | pr_err("%s: failed to update PI IRTE\n", __func__); | |
4565 | goto out; | |
4566 | } | |
4567 | } | |
4568 | ||
4569 | ret = 0; | |
4570 | out: | |
4571 | srcu_read_unlock(&kvm->irq_srcu, idx); | |
4572 | return ret; | |
4573 | } | |
4574 | ||
95ba8273 GN |
4575 | static int svm_nmi_allowed(struct kvm_vcpu *vcpu) |
4576 | { | |
4577 | struct vcpu_svm *svm = to_svm(vcpu); | |
4578 | struct vmcb *vmcb = svm->vmcb; | |
924584cc JR |
4579 | int ret; |
4580 | ret = !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) && | |
4581 | !(svm->vcpu.arch.hflags & HF_NMI_MASK); | |
4582 | ret = ret && gif_set(svm) && nested_svm_nmi(svm); | |
4583 | ||
4584 | return ret; | |
aaacfc9a JR |
4585 | } |
4586 | ||
3cfc3092 JK |
4587 | static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu) |
4588 | { | |
4589 | struct vcpu_svm *svm = to_svm(vcpu); | |
4590 | ||
4591 | return !!(svm->vcpu.arch.hflags & HF_NMI_MASK); | |
4592 | } | |
4593 | ||
4594 | static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) | |
4595 | { | |
4596 | struct vcpu_svm *svm = to_svm(vcpu); | |
4597 | ||
4598 | if (masked) { | |
4599 | svm->vcpu.arch.hflags |= HF_NMI_MASK; | |
8a05a1b8 | 4600 | set_intercept(svm, INTERCEPT_IRET); |
3cfc3092 JK |
4601 | } else { |
4602 | svm->vcpu.arch.hflags &= ~HF_NMI_MASK; | |
8a05a1b8 | 4603 | clr_intercept(svm, INTERCEPT_IRET); |
3cfc3092 JK |
4604 | } |
4605 | } | |
4606 | ||
78646121 GN |
4607 | static int svm_interrupt_allowed(struct kvm_vcpu *vcpu) |
4608 | { | |
4609 | struct vcpu_svm *svm = to_svm(vcpu); | |
4610 | struct vmcb *vmcb = svm->vmcb; | |
7fcdb510 JR |
4611 | int ret; |
4612 | ||
4613 | if (!gif_set(svm) || | |
4614 | (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)) | |
4615 | return 0; | |
4616 | ||
f6e78475 | 4617 | ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF); |
7fcdb510 | 4618 | |
2030753d | 4619 | if (is_guest_mode(vcpu)) |
7fcdb510 JR |
4620 | return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK); |
4621 | ||
4622 | return ret; | |
78646121 GN |
4623 | } |
4624 | ||
c9a7953f | 4625 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
6aa8b732 | 4626 | { |
219b65dc | 4627 | struct vcpu_svm *svm = to_svm(vcpu); |
219b65dc | 4628 | |
340d3bc3 SS |
4629 | if (kvm_vcpu_apicv_active(vcpu)) |
4630 | return; | |
4631 | ||
e0231715 JR |
4632 | /* |
4633 | * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes | |
4634 | * 1, because that's a separate STGI/VMRUN intercept. The next time we | |
4635 | * get that intercept, this function will be called again though and | |
4636 | * we'll get the vintr intercept. | |
4637 | */ | |
8fe54654 | 4638 | if (gif_set(svm) && nested_svm_intr(svm)) { |
219b65dc AG |
4639 | svm_set_vintr(svm); |
4640 | svm_inject_irq(svm, 0x0); | |
4641 | } | |
85f455f7 ED |
4642 | } |
4643 | ||
c9a7953f | 4644 | static void enable_nmi_window(struct kvm_vcpu *vcpu) |
c1150d8c | 4645 | { |
04d2cc77 | 4646 | struct vcpu_svm *svm = to_svm(vcpu); |
c1150d8c | 4647 | |
44c11430 GN |
4648 | if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK)) |
4649 | == HF_NMI_MASK) | |
c9a7953f | 4650 | return; /* IRET will cause a vm exit */ |
44c11430 | 4651 | |
e0231715 JR |
4652 | /* |
4653 | * Something prevents NMI from been injected. Single step over possible | |
4654 | * problem (IRET or exception injection or interrupt shadow) | |
4655 | */ | |
6be7d306 | 4656 | svm->nmi_singlestep = true; |
44c11430 | 4657 | svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF); |
c1150d8c DL |
4658 | } |
4659 | ||
cbc94022 IE |
4660 | static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr) |
4661 | { | |
4662 | return 0; | |
4663 | } | |
4664 | ||
d9e368d6 AK |
4665 | static void svm_flush_tlb(struct kvm_vcpu *vcpu) |
4666 | { | |
38e5e92f JR |
4667 | struct vcpu_svm *svm = to_svm(vcpu); |
4668 | ||
4669 | if (static_cpu_has(X86_FEATURE_FLUSHBYASID)) | |
4670 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID; | |
4671 | else | |
4672 | svm->asid_generation--; | |
d9e368d6 AK |
4673 | } |
4674 | ||
04d2cc77 AK |
4675 | static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu) |
4676 | { | |
4677 | } | |
4678 | ||
d7bf8221 JR |
4679 | static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu) |
4680 | { | |
4681 | struct vcpu_svm *svm = to_svm(vcpu); | |
4682 | ||
3bbf3565 | 4683 | if (svm_nested_virtualize_tpr(vcpu)) |
88ab24ad JR |
4684 | return; |
4685 | ||
4ee546b4 | 4686 | if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) { |
d7bf8221 | 4687 | int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK; |
615d5193 | 4688 | kvm_set_cr8(vcpu, cr8); |
d7bf8221 JR |
4689 | } |
4690 | } | |
4691 | ||
649d6864 JR |
4692 | static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu) |
4693 | { | |
4694 | struct vcpu_svm *svm = to_svm(vcpu); | |
4695 | u64 cr8; | |
4696 | ||
3bbf3565 SS |
4697 | if (svm_nested_virtualize_tpr(vcpu) || |
4698 | kvm_vcpu_apicv_active(vcpu)) | |
88ab24ad JR |
4699 | return; |
4700 | ||
649d6864 JR |
4701 | cr8 = kvm_get_cr8(vcpu); |
4702 | svm->vmcb->control.int_ctl &= ~V_TPR_MASK; | |
4703 | svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK; | |
4704 | } | |
4705 | ||
9222be18 GN |
4706 | static void svm_complete_interrupts(struct vcpu_svm *svm) |
4707 | { | |
4708 | u8 vector; | |
4709 | int type; | |
4710 | u32 exitintinfo = svm->vmcb->control.exit_int_info; | |
66b7138f JK |
4711 | unsigned int3_injected = svm->int3_injected; |
4712 | ||
4713 | svm->int3_injected = 0; | |
9222be18 | 4714 | |
bd3d1ec3 AK |
4715 | /* |
4716 | * If we've made progress since setting HF_IRET_MASK, we've | |
4717 | * executed an IRET and can allow NMI injection. | |
4718 | */ | |
4719 | if ((svm->vcpu.arch.hflags & HF_IRET_MASK) | |
4720 | && kvm_rip_read(&svm->vcpu) != svm->nmi_iret_rip) { | |
44c11430 | 4721 | svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK); |
3842d135 AK |
4722 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
4723 | } | |
44c11430 | 4724 | |
9222be18 GN |
4725 | svm->vcpu.arch.nmi_injected = false; |
4726 | kvm_clear_exception_queue(&svm->vcpu); | |
4727 | kvm_clear_interrupt_queue(&svm->vcpu); | |
4728 | ||
4729 | if (!(exitintinfo & SVM_EXITINTINFO_VALID)) | |
4730 | return; | |
4731 | ||
3842d135 AK |
4732 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
4733 | ||
9222be18 GN |
4734 | vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK; |
4735 | type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK; | |
4736 | ||
4737 | switch (type) { | |
4738 | case SVM_EXITINTINFO_TYPE_NMI: | |
4739 | svm->vcpu.arch.nmi_injected = true; | |
4740 | break; | |
4741 | case SVM_EXITINTINFO_TYPE_EXEPT: | |
66b7138f JK |
4742 | /* |
4743 | * In case of software exceptions, do not reinject the vector, | |
4744 | * but re-execute the instruction instead. Rewind RIP first | |
4745 | * if we emulated INT3 before. | |
4746 | */ | |
4747 | if (kvm_exception_is_soft(vector)) { | |
4748 | if (vector == BP_VECTOR && int3_injected && | |
4749 | kvm_is_linear_rip(&svm->vcpu, svm->int3_rip)) | |
4750 | kvm_rip_write(&svm->vcpu, | |
4751 | kvm_rip_read(&svm->vcpu) - | |
4752 | int3_injected); | |
9222be18 | 4753 | break; |
66b7138f | 4754 | } |
9222be18 GN |
4755 | if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) { |
4756 | u32 err = svm->vmcb->control.exit_int_info_err; | |
ce7ddec4 | 4757 | kvm_requeue_exception_e(&svm->vcpu, vector, err); |
9222be18 GN |
4758 | |
4759 | } else | |
ce7ddec4 | 4760 | kvm_requeue_exception(&svm->vcpu, vector); |
9222be18 GN |
4761 | break; |
4762 | case SVM_EXITINTINFO_TYPE_INTR: | |
66fd3f7f | 4763 | kvm_queue_interrupt(&svm->vcpu, vector, false); |
9222be18 GN |
4764 | break; |
4765 | default: | |
4766 | break; | |
4767 | } | |
4768 | } | |
4769 | ||
b463a6f7 AK |
4770 | static void svm_cancel_injection(struct kvm_vcpu *vcpu) |
4771 | { | |
4772 | struct vcpu_svm *svm = to_svm(vcpu); | |
4773 | struct vmcb_control_area *control = &svm->vmcb->control; | |
4774 | ||
4775 | control->exit_int_info = control->event_inj; | |
4776 | control->exit_int_info_err = control->event_inj_err; | |
4777 | control->event_inj = 0; | |
4778 | svm_complete_interrupts(svm); | |
4779 | } | |
4780 | ||
851ba692 | 4781 | static void svm_vcpu_run(struct kvm_vcpu *vcpu) |
6aa8b732 | 4782 | { |
a2fa3e9f | 4783 | struct vcpu_svm *svm = to_svm(vcpu); |
d9e368d6 | 4784 | |
2041a06a JR |
4785 | svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX]; |
4786 | svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP]; | |
4787 | svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP]; | |
4788 | ||
cd3ff653 JR |
4789 | /* |
4790 | * A vmexit emulation is required before the vcpu can be executed | |
4791 | * again. | |
4792 | */ | |
4793 | if (unlikely(svm->nested.exit_required)) | |
4794 | return; | |
4795 | ||
e756fc62 | 4796 | pre_svm_run(svm); |
6aa8b732 | 4797 | |
649d6864 JR |
4798 | sync_lapic_to_cr8(vcpu); |
4799 | ||
cda0ffdd | 4800 | svm->vmcb->save.cr2 = vcpu->arch.cr2; |
6aa8b732 | 4801 | |
04d2cc77 AK |
4802 | clgi(); |
4803 | ||
4804 | local_irq_enable(); | |
36241b8c | 4805 | |
6aa8b732 | 4806 | asm volatile ( |
7454766f AK |
4807 | "push %%" _ASM_BP "; \n\t" |
4808 | "mov %c[rbx](%[svm]), %%" _ASM_BX " \n\t" | |
4809 | "mov %c[rcx](%[svm]), %%" _ASM_CX " \n\t" | |
4810 | "mov %c[rdx](%[svm]), %%" _ASM_DX " \n\t" | |
4811 | "mov %c[rsi](%[svm]), %%" _ASM_SI " \n\t" | |
4812 | "mov %c[rdi](%[svm]), %%" _ASM_DI " \n\t" | |
4813 | "mov %c[rbp](%[svm]), %%" _ASM_BP " \n\t" | |
05b3e0c2 | 4814 | #ifdef CONFIG_X86_64 |
fb3f0f51 RR |
4815 | "mov %c[r8](%[svm]), %%r8 \n\t" |
4816 | "mov %c[r9](%[svm]), %%r9 \n\t" | |
4817 | "mov %c[r10](%[svm]), %%r10 \n\t" | |
4818 | "mov %c[r11](%[svm]), %%r11 \n\t" | |
4819 | "mov %c[r12](%[svm]), %%r12 \n\t" | |
4820 | "mov %c[r13](%[svm]), %%r13 \n\t" | |
4821 | "mov %c[r14](%[svm]), %%r14 \n\t" | |
4822 | "mov %c[r15](%[svm]), %%r15 \n\t" | |
6aa8b732 AK |
4823 | #endif |
4824 | ||
6aa8b732 | 4825 | /* Enter guest mode */ |
7454766f AK |
4826 | "push %%" _ASM_AX " \n\t" |
4827 | "mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t" | |
4ecac3fd AK |
4828 | __ex(SVM_VMLOAD) "\n\t" |
4829 | __ex(SVM_VMRUN) "\n\t" | |
4830 | __ex(SVM_VMSAVE) "\n\t" | |
7454766f | 4831 | "pop %%" _ASM_AX " \n\t" |
6aa8b732 AK |
4832 | |
4833 | /* Save guest registers, load host registers */ | |
7454766f AK |
4834 | "mov %%" _ASM_BX ", %c[rbx](%[svm]) \n\t" |
4835 | "mov %%" _ASM_CX ", %c[rcx](%[svm]) \n\t" | |
4836 | "mov %%" _ASM_DX ", %c[rdx](%[svm]) \n\t" | |
4837 | "mov %%" _ASM_SI ", %c[rsi](%[svm]) \n\t" | |
4838 | "mov %%" _ASM_DI ", %c[rdi](%[svm]) \n\t" | |
4839 | "mov %%" _ASM_BP ", %c[rbp](%[svm]) \n\t" | |
05b3e0c2 | 4840 | #ifdef CONFIG_X86_64 |
fb3f0f51 RR |
4841 | "mov %%r8, %c[r8](%[svm]) \n\t" |
4842 | "mov %%r9, %c[r9](%[svm]) \n\t" | |
4843 | "mov %%r10, %c[r10](%[svm]) \n\t" | |
4844 | "mov %%r11, %c[r11](%[svm]) \n\t" | |
4845 | "mov %%r12, %c[r12](%[svm]) \n\t" | |
4846 | "mov %%r13, %c[r13](%[svm]) \n\t" | |
4847 | "mov %%r14, %c[r14](%[svm]) \n\t" | |
4848 | "mov %%r15, %c[r15](%[svm]) \n\t" | |
6aa8b732 | 4849 | #endif |
7454766f | 4850 | "pop %%" _ASM_BP |
6aa8b732 | 4851 | : |
fb3f0f51 | 4852 | : [svm]"a"(svm), |
6aa8b732 | 4853 | [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)), |
ad312c7c ZX |
4854 | [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])), |
4855 | [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])), | |
4856 | [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])), | |
4857 | [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])), | |
4858 | [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])), | |
4859 | [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP])) | |
05b3e0c2 | 4860 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
4861 | , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])), |
4862 | [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])), | |
4863 | [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])), | |
4864 | [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])), | |
4865 | [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])), | |
4866 | [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])), | |
4867 | [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])), | |
4868 | [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15])) | |
6aa8b732 | 4869 | #endif |
54a08c04 LV |
4870 | : "cc", "memory" |
4871 | #ifdef CONFIG_X86_64 | |
7454766f | 4872 | , "rbx", "rcx", "rdx", "rsi", "rdi" |
54a08c04 | 4873 | , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15" |
7454766f AK |
4874 | #else |
4875 | , "ebx", "ecx", "edx", "esi", "edi" | |
54a08c04 LV |
4876 | #endif |
4877 | ); | |
6aa8b732 | 4878 | |
82ca2d10 AK |
4879 | #ifdef CONFIG_X86_64 |
4880 | wrmsrl(MSR_GS_BASE, svm->host.gs_base); | |
4881 | #else | |
dacccfdd | 4882 | loadsegment(fs, svm->host.fs); |
831ca609 AK |
4883 | #ifndef CONFIG_X86_32_LAZY_GS |
4884 | loadsegment(gs, svm->host.gs); | |
4885 | #endif | |
9581d442 | 4886 | #endif |
6aa8b732 AK |
4887 | |
4888 | reload_tss(vcpu); | |
4889 | ||
56ba47dd AK |
4890 | local_irq_disable(); |
4891 | ||
13c34e07 AK |
4892 | vcpu->arch.cr2 = svm->vmcb->save.cr2; |
4893 | vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax; | |
4894 | vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp; | |
4895 | vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip; | |
4896 | ||
3781c01c JR |
4897 | if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI)) |
4898 | kvm_before_handle_nmi(&svm->vcpu); | |
4899 | ||
4900 | stgi(); | |
4901 | ||
4902 | /* Any pending NMI will happen here */ | |
4903 | ||
4904 | if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI)) | |
4905 | kvm_after_handle_nmi(&svm->vcpu); | |
4906 | ||
d7bf8221 JR |
4907 | sync_cr8_to_lapic(vcpu); |
4908 | ||
a2fa3e9f | 4909 | svm->next_rip = 0; |
9222be18 | 4910 | |
38e5e92f JR |
4911 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING; |
4912 | ||
631bc487 GN |
4913 | /* if exit due to PF check for async PF */ |
4914 | if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) | |
4915 | svm->apf_reason = kvm_read_and_reset_pf_reason(); | |
4916 | ||
6de4f3ad AK |
4917 | if (npt_enabled) { |
4918 | vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR); | |
4919 | vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR); | |
4920 | } | |
fe5913e4 JR |
4921 | |
4922 | /* | |
4923 | * We need to handle MC intercepts here before the vcpu has a chance to | |
4924 | * change the physical cpu | |
4925 | */ | |
4926 | if (unlikely(svm->vmcb->control.exit_code == | |
4927 | SVM_EXIT_EXCP_BASE + MC_VECTOR)) | |
4928 | svm_handle_mce(svm); | |
8d28fec4 RJ |
4929 | |
4930 | mark_all_clean(svm->vmcb); | |
6aa8b732 AK |
4931 | } |
4932 | ||
6aa8b732 AK |
4933 | static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root) |
4934 | { | |
a2fa3e9f GH |
4935 | struct vcpu_svm *svm = to_svm(vcpu); |
4936 | ||
4937 | svm->vmcb->save.cr3 = root; | |
dcca1a65 | 4938 | mark_dirty(svm->vmcb, VMCB_CR); |
f40f6a45 | 4939 | svm_flush_tlb(vcpu); |
6aa8b732 AK |
4940 | } |
4941 | ||
1c97f0a0 JR |
4942 | static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root) |
4943 | { | |
4944 | struct vcpu_svm *svm = to_svm(vcpu); | |
4945 | ||
4946 | svm->vmcb->control.nested_cr3 = root; | |
b2747166 | 4947 | mark_dirty(svm->vmcb, VMCB_NPT); |
1c97f0a0 JR |
4948 | |
4949 | /* Also sync guest cr3 here in case we live migrate */ | |
9f8fe504 | 4950 | svm->vmcb->save.cr3 = kvm_read_cr3(vcpu); |
dcca1a65 | 4951 | mark_dirty(svm->vmcb, VMCB_CR); |
1c97f0a0 | 4952 | |
f40f6a45 | 4953 | svm_flush_tlb(vcpu); |
1c97f0a0 JR |
4954 | } |
4955 | ||
6aa8b732 AK |
4956 | static int is_disabled(void) |
4957 | { | |
6031a61c JR |
4958 | u64 vm_cr; |
4959 | ||
4960 | rdmsrl(MSR_VM_CR, vm_cr); | |
4961 | if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE)) | |
4962 | return 1; | |
4963 | ||
6aa8b732 AK |
4964 | return 0; |
4965 | } | |
4966 | ||
102d8325 IM |
4967 | static void |
4968 | svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
4969 | { | |
4970 | /* | |
4971 | * Patch in the VMMCALL instruction: | |
4972 | */ | |
4973 | hypercall[0] = 0x0f; | |
4974 | hypercall[1] = 0x01; | |
4975 | hypercall[2] = 0xd9; | |
102d8325 IM |
4976 | } |
4977 | ||
002c7f7c YS |
4978 | static void svm_check_processor_compat(void *rtn) |
4979 | { | |
4980 | *(int *)rtn = 0; | |
4981 | } | |
4982 | ||
774ead3a AK |
4983 | static bool svm_cpu_has_accelerated_tpr(void) |
4984 | { | |
4985 | return false; | |
4986 | } | |
4987 | ||
6d396b55 PB |
4988 | static bool svm_has_high_real_mode_segbase(void) |
4989 | { | |
4990 | return true; | |
4991 | } | |
4992 | ||
fc07e76a PB |
4993 | static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) |
4994 | { | |
4995 | return 0; | |
4996 | } | |
4997 | ||
0e851880 SY |
4998 | static void svm_cpuid_update(struct kvm_vcpu *vcpu) |
4999 | { | |
6092d3d3 | 5000 | struct vcpu_svm *svm = to_svm(vcpu); |
46781eae | 5001 | struct kvm_cpuid_entry2 *entry; |
6092d3d3 JR |
5002 | |
5003 | /* Update nrips enabled cache */ | |
5004 | svm->nrips_enabled = !!guest_cpuid_has_nrips(&svm->vcpu); | |
46781eae SS |
5005 | |
5006 | if (!kvm_vcpu_apicv_active(vcpu)) | |
5007 | return; | |
5008 | ||
5009 | entry = kvm_find_cpuid_entry(vcpu, 1, 0); | |
5010 | if (entry) | |
5011 | entry->ecx &= ~bit(X86_FEATURE_X2APIC); | |
0e851880 SY |
5012 | } |
5013 | ||
d4330ef2 JR |
5014 | static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) |
5015 | { | |
c2c63a49 | 5016 | switch (func) { |
46781eae SS |
5017 | case 0x1: |
5018 | if (avic) | |
5019 | entry->ecx &= ~bit(X86_FEATURE_X2APIC); | |
5020 | break; | |
4c62a2dc JR |
5021 | case 0x80000001: |
5022 | if (nested) | |
5023 | entry->ecx |= (1 << 2); /* Set SVM bit */ | |
5024 | break; | |
c2c63a49 JR |
5025 | case 0x8000000A: |
5026 | entry->eax = 1; /* SVM revision 1 */ | |
5027 | entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper | |
5028 | ASID emulation to nested SVM */ | |
5029 | entry->ecx = 0; /* Reserved */ | |
7a190667 JR |
5030 | entry->edx = 0; /* Per default do not support any |
5031 | additional features */ | |
5032 | ||
5033 | /* Support next_rip if host supports it */ | |
2a6b20b8 | 5034 | if (boot_cpu_has(X86_FEATURE_NRIPS)) |
7a190667 | 5035 | entry->edx |= SVM_FEATURE_NRIP; |
c2c63a49 | 5036 | |
3d4aeaad JR |
5037 | /* Support NPT for the guest if enabled */ |
5038 | if (npt_enabled) | |
5039 | entry->edx |= SVM_FEATURE_NPT; | |
5040 | ||
c2c63a49 JR |
5041 | break; |
5042 | } | |
d4330ef2 JR |
5043 | } |
5044 | ||
17cc3935 | 5045 | static int svm_get_lpage_level(void) |
344f414f | 5046 | { |
17cc3935 | 5047 | return PT_PDPE_LEVEL; |
344f414f JR |
5048 | } |
5049 | ||
4e47c7a6 SY |
5050 | static bool svm_rdtscp_supported(void) |
5051 | { | |
46896c73 | 5052 | return boot_cpu_has(X86_FEATURE_RDTSCP); |
4e47c7a6 SY |
5053 | } |
5054 | ||
ad756a16 MJ |
5055 | static bool svm_invpcid_supported(void) |
5056 | { | |
5057 | return false; | |
5058 | } | |
5059 | ||
93c4adc7 PB |
5060 | static bool svm_mpx_supported(void) |
5061 | { | |
5062 | return false; | |
5063 | } | |
5064 | ||
55412b2e WL |
5065 | static bool svm_xsaves_supported(void) |
5066 | { | |
5067 | return false; | |
5068 | } | |
5069 | ||
f5f48ee1 SY |
5070 | static bool svm_has_wbinvd_exit(void) |
5071 | { | |
5072 | return true; | |
5073 | } | |
5074 | ||
02daab21 AK |
5075 | static void svm_fpu_deactivate(struct kvm_vcpu *vcpu) |
5076 | { | |
5077 | struct vcpu_svm *svm = to_svm(vcpu); | |
5078 | ||
18c918c5 | 5079 | set_exception_intercept(svm, NM_VECTOR); |
66a562f7 | 5080 | update_cr0_intercept(svm); |
02daab21 AK |
5081 | } |
5082 | ||
8061252e | 5083 | #define PRE_EX(exit) { .exit_code = (exit), \ |
40e19b51 | 5084 | .stage = X86_ICPT_PRE_EXCEPT, } |
cfec82cb | 5085 | #define POST_EX(exit) { .exit_code = (exit), \ |
40e19b51 | 5086 | .stage = X86_ICPT_POST_EXCEPT, } |
d7eb8203 | 5087 | #define POST_MEM(exit) { .exit_code = (exit), \ |
40e19b51 | 5088 | .stage = X86_ICPT_POST_MEMACCESS, } |
cfec82cb | 5089 | |
09941fbb | 5090 | static const struct __x86_intercept { |
cfec82cb JR |
5091 | u32 exit_code; |
5092 | enum x86_intercept_stage stage; | |
cfec82cb JR |
5093 | } x86_intercept_map[] = { |
5094 | [x86_intercept_cr_read] = POST_EX(SVM_EXIT_READ_CR0), | |
5095 | [x86_intercept_cr_write] = POST_EX(SVM_EXIT_WRITE_CR0), | |
5096 | [x86_intercept_clts] = POST_EX(SVM_EXIT_WRITE_CR0), | |
5097 | [x86_intercept_lmsw] = POST_EX(SVM_EXIT_WRITE_CR0), | |
5098 | [x86_intercept_smsw] = POST_EX(SVM_EXIT_READ_CR0), | |
3b88e41a JR |
5099 | [x86_intercept_dr_read] = POST_EX(SVM_EXIT_READ_DR0), |
5100 | [x86_intercept_dr_write] = POST_EX(SVM_EXIT_WRITE_DR0), | |
dee6bb70 JR |
5101 | [x86_intercept_sldt] = POST_EX(SVM_EXIT_LDTR_READ), |
5102 | [x86_intercept_str] = POST_EX(SVM_EXIT_TR_READ), | |
5103 | [x86_intercept_lldt] = POST_EX(SVM_EXIT_LDTR_WRITE), | |
5104 | [x86_intercept_ltr] = POST_EX(SVM_EXIT_TR_WRITE), | |
5105 | [x86_intercept_sgdt] = POST_EX(SVM_EXIT_GDTR_READ), | |
5106 | [x86_intercept_sidt] = POST_EX(SVM_EXIT_IDTR_READ), | |
5107 | [x86_intercept_lgdt] = POST_EX(SVM_EXIT_GDTR_WRITE), | |
5108 | [x86_intercept_lidt] = POST_EX(SVM_EXIT_IDTR_WRITE), | |
01de8b09 JR |
5109 | [x86_intercept_vmrun] = POST_EX(SVM_EXIT_VMRUN), |
5110 | [x86_intercept_vmmcall] = POST_EX(SVM_EXIT_VMMCALL), | |
5111 | [x86_intercept_vmload] = POST_EX(SVM_EXIT_VMLOAD), | |
5112 | [x86_intercept_vmsave] = POST_EX(SVM_EXIT_VMSAVE), | |
5113 | [x86_intercept_stgi] = POST_EX(SVM_EXIT_STGI), | |
5114 | [x86_intercept_clgi] = POST_EX(SVM_EXIT_CLGI), | |
5115 | [x86_intercept_skinit] = POST_EX(SVM_EXIT_SKINIT), | |
5116 | [x86_intercept_invlpga] = POST_EX(SVM_EXIT_INVLPGA), | |
d7eb8203 JR |
5117 | [x86_intercept_rdtscp] = POST_EX(SVM_EXIT_RDTSCP), |
5118 | [x86_intercept_monitor] = POST_MEM(SVM_EXIT_MONITOR), | |
5119 | [x86_intercept_mwait] = POST_EX(SVM_EXIT_MWAIT), | |
8061252e JR |
5120 | [x86_intercept_invlpg] = POST_EX(SVM_EXIT_INVLPG), |
5121 | [x86_intercept_invd] = POST_EX(SVM_EXIT_INVD), | |
5122 | [x86_intercept_wbinvd] = POST_EX(SVM_EXIT_WBINVD), | |
5123 | [x86_intercept_wrmsr] = POST_EX(SVM_EXIT_MSR), | |
5124 | [x86_intercept_rdtsc] = POST_EX(SVM_EXIT_RDTSC), | |
5125 | [x86_intercept_rdmsr] = POST_EX(SVM_EXIT_MSR), | |
5126 | [x86_intercept_rdpmc] = POST_EX(SVM_EXIT_RDPMC), | |
5127 | [x86_intercept_cpuid] = PRE_EX(SVM_EXIT_CPUID), | |
5128 | [x86_intercept_rsm] = PRE_EX(SVM_EXIT_RSM), | |
bf608f88 JR |
5129 | [x86_intercept_pause] = PRE_EX(SVM_EXIT_PAUSE), |
5130 | [x86_intercept_pushf] = PRE_EX(SVM_EXIT_PUSHF), | |
5131 | [x86_intercept_popf] = PRE_EX(SVM_EXIT_POPF), | |
5132 | [x86_intercept_intn] = PRE_EX(SVM_EXIT_SWINT), | |
5133 | [x86_intercept_iret] = PRE_EX(SVM_EXIT_IRET), | |
5134 | [x86_intercept_icebp] = PRE_EX(SVM_EXIT_ICEBP), | |
5135 | [x86_intercept_hlt] = POST_EX(SVM_EXIT_HLT), | |
f6511935 JR |
5136 | [x86_intercept_in] = POST_EX(SVM_EXIT_IOIO), |
5137 | [x86_intercept_ins] = POST_EX(SVM_EXIT_IOIO), | |
5138 | [x86_intercept_out] = POST_EX(SVM_EXIT_IOIO), | |
5139 | [x86_intercept_outs] = POST_EX(SVM_EXIT_IOIO), | |
cfec82cb JR |
5140 | }; |
5141 | ||
8061252e | 5142 | #undef PRE_EX |
cfec82cb | 5143 | #undef POST_EX |
d7eb8203 | 5144 | #undef POST_MEM |
cfec82cb | 5145 | |
8a76d7f2 JR |
5146 | static int svm_check_intercept(struct kvm_vcpu *vcpu, |
5147 | struct x86_instruction_info *info, | |
5148 | enum x86_intercept_stage stage) | |
5149 | { | |
cfec82cb JR |
5150 | struct vcpu_svm *svm = to_svm(vcpu); |
5151 | int vmexit, ret = X86EMUL_CONTINUE; | |
5152 | struct __x86_intercept icpt_info; | |
5153 | struct vmcb *vmcb = svm->vmcb; | |
5154 | ||
5155 | if (info->intercept >= ARRAY_SIZE(x86_intercept_map)) | |
5156 | goto out; | |
5157 | ||
5158 | icpt_info = x86_intercept_map[info->intercept]; | |
5159 | ||
40e19b51 | 5160 | if (stage != icpt_info.stage) |
cfec82cb JR |
5161 | goto out; |
5162 | ||
5163 | switch (icpt_info.exit_code) { | |
5164 | case SVM_EXIT_READ_CR0: | |
5165 | if (info->intercept == x86_intercept_cr_read) | |
5166 | icpt_info.exit_code += info->modrm_reg; | |
5167 | break; | |
5168 | case SVM_EXIT_WRITE_CR0: { | |
5169 | unsigned long cr0, val; | |
5170 | u64 intercept; | |
5171 | ||
5172 | if (info->intercept == x86_intercept_cr_write) | |
5173 | icpt_info.exit_code += info->modrm_reg; | |
5174 | ||
62baf44c JK |
5175 | if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 || |
5176 | info->intercept == x86_intercept_clts) | |
cfec82cb JR |
5177 | break; |
5178 | ||
5179 | intercept = svm->nested.intercept; | |
5180 | ||
5181 | if (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0))) | |
5182 | break; | |
5183 | ||
5184 | cr0 = vcpu->arch.cr0 & ~SVM_CR0_SELECTIVE_MASK; | |
5185 | val = info->src_val & ~SVM_CR0_SELECTIVE_MASK; | |
5186 | ||
5187 | if (info->intercept == x86_intercept_lmsw) { | |
5188 | cr0 &= 0xfUL; | |
5189 | val &= 0xfUL; | |
5190 | /* lmsw can't clear PE - catch this here */ | |
5191 | if (cr0 & X86_CR0_PE) | |
5192 | val |= X86_CR0_PE; | |
5193 | } | |
5194 | ||
5195 | if (cr0 ^ val) | |
5196 | icpt_info.exit_code = SVM_EXIT_CR0_SEL_WRITE; | |
5197 | ||
5198 | break; | |
5199 | } | |
3b88e41a JR |
5200 | case SVM_EXIT_READ_DR0: |
5201 | case SVM_EXIT_WRITE_DR0: | |
5202 | icpt_info.exit_code += info->modrm_reg; | |
5203 | break; | |
8061252e JR |
5204 | case SVM_EXIT_MSR: |
5205 | if (info->intercept == x86_intercept_wrmsr) | |
5206 | vmcb->control.exit_info_1 = 1; | |
5207 | else | |
5208 | vmcb->control.exit_info_1 = 0; | |
5209 | break; | |
bf608f88 JR |
5210 | case SVM_EXIT_PAUSE: |
5211 | /* | |
5212 | * We get this for NOP only, but pause | |
5213 | * is rep not, check this here | |
5214 | */ | |
5215 | if (info->rep_prefix != REPE_PREFIX) | |
5216 | goto out; | |
f6511935 JR |
5217 | case SVM_EXIT_IOIO: { |
5218 | u64 exit_info; | |
5219 | u32 bytes; | |
5220 | ||
f6511935 JR |
5221 | if (info->intercept == x86_intercept_in || |
5222 | info->intercept == x86_intercept_ins) { | |
6cbc5f5a JK |
5223 | exit_info = ((info->src_val & 0xffff) << 16) | |
5224 | SVM_IOIO_TYPE_MASK; | |
f6511935 | 5225 | bytes = info->dst_bytes; |
6493f157 | 5226 | } else { |
6cbc5f5a | 5227 | exit_info = (info->dst_val & 0xffff) << 16; |
6493f157 | 5228 | bytes = info->src_bytes; |
f6511935 JR |
5229 | } |
5230 | ||
5231 | if (info->intercept == x86_intercept_outs || | |
5232 | info->intercept == x86_intercept_ins) | |
5233 | exit_info |= SVM_IOIO_STR_MASK; | |
5234 | ||
5235 | if (info->rep_prefix) | |
5236 | exit_info |= SVM_IOIO_REP_MASK; | |
5237 | ||
5238 | bytes = min(bytes, 4u); | |
5239 | ||
5240 | exit_info |= bytes << SVM_IOIO_SIZE_SHIFT; | |
5241 | ||
5242 | exit_info |= (u32)info->ad_bytes << (SVM_IOIO_ASIZE_SHIFT - 1); | |
5243 | ||
5244 | vmcb->control.exit_info_1 = exit_info; | |
5245 | vmcb->control.exit_info_2 = info->next_rip; | |
5246 | ||
5247 | break; | |
5248 | } | |
cfec82cb JR |
5249 | default: |
5250 | break; | |
5251 | } | |
5252 | ||
f104765b BD |
5253 | /* TODO: Advertise NRIPS to guest hypervisor unconditionally */ |
5254 | if (static_cpu_has(X86_FEATURE_NRIPS)) | |
5255 | vmcb->control.next_rip = info->next_rip; | |
cfec82cb JR |
5256 | vmcb->control.exit_code = icpt_info.exit_code; |
5257 | vmexit = nested_svm_exit_handled(svm); | |
5258 | ||
5259 | ret = (vmexit == NESTED_EXIT_DONE) ? X86EMUL_INTERCEPTED | |
5260 | : X86EMUL_CONTINUE; | |
5261 | ||
5262 | out: | |
5263 | return ret; | |
8a76d7f2 JR |
5264 | } |
5265 | ||
a547c6db YZ |
5266 | static void svm_handle_external_intr(struct kvm_vcpu *vcpu) |
5267 | { | |
5268 | local_irq_enable(); | |
f2485b3e PB |
5269 | /* |
5270 | * We must have an instruction with interrupts enabled, so | |
5271 | * the timer interrupt isn't delayed by the interrupt shadow. | |
5272 | */ | |
5273 | asm("nop"); | |
5274 | local_irq_disable(); | |
a547c6db YZ |
5275 | } |
5276 | ||
ae97a3b8 RK |
5277 | static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu) |
5278 | { | |
5279 | } | |
5280 | ||
be8ca170 SS |
5281 | static inline void avic_post_state_restore(struct kvm_vcpu *vcpu) |
5282 | { | |
5283 | if (avic_handle_apic_id_update(vcpu) != 0) | |
5284 | return; | |
5285 | if (avic_handle_dfr_update(vcpu) != 0) | |
5286 | return; | |
5287 | avic_handle_ldr_update(vcpu); | |
5288 | } | |
5289 | ||
404f6aac | 5290 | static struct kvm_x86_ops svm_x86_ops __ro_after_init = { |
6aa8b732 AK |
5291 | .cpu_has_kvm_support = has_svm, |
5292 | .disabled_by_bios = is_disabled, | |
5293 | .hardware_setup = svm_hardware_setup, | |
5294 | .hardware_unsetup = svm_hardware_unsetup, | |
002c7f7c | 5295 | .check_processor_compatibility = svm_check_processor_compat, |
6aa8b732 AK |
5296 | .hardware_enable = svm_hardware_enable, |
5297 | .hardware_disable = svm_hardware_disable, | |
774ead3a | 5298 | .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr, |
6d396b55 | 5299 | .cpu_has_high_real_mode_segbase = svm_has_high_real_mode_segbase, |
6aa8b732 AK |
5300 | |
5301 | .vcpu_create = svm_create_vcpu, | |
5302 | .vcpu_free = svm_free_vcpu, | |
04d2cc77 | 5303 | .vcpu_reset = svm_vcpu_reset, |
6aa8b732 | 5304 | |
44a95dae SS |
5305 | .vm_init = avic_vm_init, |
5306 | .vm_destroy = avic_vm_destroy, | |
5307 | ||
04d2cc77 | 5308 | .prepare_guest_switch = svm_prepare_guest_switch, |
6aa8b732 AK |
5309 | .vcpu_load = svm_vcpu_load, |
5310 | .vcpu_put = svm_vcpu_put, | |
8221c137 SS |
5311 | .vcpu_blocking = svm_vcpu_blocking, |
5312 | .vcpu_unblocking = svm_vcpu_unblocking, | |
6aa8b732 | 5313 | |
a96036b8 | 5314 | .update_bp_intercept = update_bp_intercept, |
6aa8b732 AK |
5315 | .get_msr = svm_get_msr, |
5316 | .set_msr = svm_set_msr, | |
5317 | .get_segment_base = svm_get_segment_base, | |
5318 | .get_segment = svm_get_segment, | |
5319 | .set_segment = svm_set_segment, | |
2e4d2653 | 5320 | .get_cpl = svm_get_cpl, |
1747fb71 | 5321 | .get_cs_db_l_bits = kvm_get_cs_db_l_bits, |
e8467fda | 5322 | .decache_cr0_guest_bits = svm_decache_cr0_guest_bits, |
aff48baa | 5323 | .decache_cr3 = svm_decache_cr3, |
25c4c276 | 5324 | .decache_cr4_guest_bits = svm_decache_cr4_guest_bits, |
6aa8b732 | 5325 | .set_cr0 = svm_set_cr0, |
6aa8b732 AK |
5326 | .set_cr3 = svm_set_cr3, |
5327 | .set_cr4 = svm_set_cr4, | |
5328 | .set_efer = svm_set_efer, | |
5329 | .get_idt = svm_get_idt, | |
5330 | .set_idt = svm_set_idt, | |
5331 | .get_gdt = svm_get_gdt, | |
5332 | .set_gdt = svm_set_gdt, | |
73aaf249 JK |
5333 | .get_dr6 = svm_get_dr6, |
5334 | .set_dr6 = svm_set_dr6, | |
020df079 | 5335 | .set_dr7 = svm_set_dr7, |
facb0139 | 5336 | .sync_dirty_debug_regs = svm_sync_dirty_debug_regs, |
6de4f3ad | 5337 | .cache_reg = svm_cache_reg, |
6aa8b732 AK |
5338 | .get_rflags = svm_get_rflags, |
5339 | .set_rflags = svm_set_rflags, | |
be94f6b7 HH |
5340 | |
5341 | .get_pkru = svm_get_pkru, | |
5342 | ||
0fdd74f7 | 5343 | .fpu_activate = svm_fpu_activate, |
02daab21 | 5344 | .fpu_deactivate = svm_fpu_deactivate, |
6aa8b732 | 5345 | |
6aa8b732 | 5346 | .tlb_flush = svm_flush_tlb, |
6aa8b732 | 5347 | |
6aa8b732 | 5348 | .run = svm_vcpu_run, |
04d2cc77 | 5349 | .handle_exit = handle_exit, |
6aa8b732 | 5350 | .skip_emulated_instruction = skip_emulated_instruction, |
2809f5d2 GC |
5351 | .set_interrupt_shadow = svm_set_interrupt_shadow, |
5352 | .get_interrupt_shadow = svm_get_interrupt_shadow, | |
102d8325 | 5353 | .patch_hypercall = svm_patch_hypercall, |
2a8067f1 | 5354 | .set_irq = svm_set_irq, |
95ba8273 | 5355 | .set_nmi = svm_inject_nmi, |
298101da | 5356 | .queue_exception = svm_queue_exception, |
b463a6f7 | 5357 | .cancel_injection = svm_cancel_injection, |
78646121 | 5358 | .interrupt_allowed = svm_interrupt_allowed, |
95ba8273 | 5359 | .nmi_allowed = svm_nmi_allowed, |
3cfc3092 JK |
5360 | .get_nmi_mask = svm_get_nmi_mask, |
5361 | .set_nmi_mask = svm_set_nmi_mask, | |
95ba8273 GN |
5362 | .enable_nmi_window = enable_nmi_window, |
5363 | .enable_irq_window = enable_irq_window, | |
5364 | .update_cr8_intercept = update_cr8_intercept, | |
8d14695f | 5365 | .set_virtual_x2apic_mode = svm_set_virtual_x2apic_mode, |
d62caabb AS |
5366 | .get_enable_apicv = svm_get_enable_apicv, |
5367 | .refresh_apicv_exec_ctrl = svm_refresh_apicv_exec_ctrl, | |
c7c9c56c | 5368 | .load_eoi_exitmap = svm_load_eoi_exitmap, |
44a95dae SS |
5369 | .hwapic_irr_update = svm_hwapic_irr_update, |
5370 | .hwapic_isr_update = svm_hwapic_isr_update, | |
be8ca170 | 5371 | .apicv_post_state_restore = avic_post_state_restore, |
cbc94022 IE |
5372 | |
5373 | .set_tss_addr = svm_set_tss_addr, | |
67253af5 | 5374 | .get_tdp_level = get_npt_level, |
4b12f0de | 5375 | .get_mt_mask = svm_get_mt_mask, |
229456fc | 5376 | |
586f9607 | 5377 | .get_exit_info = svm_get_exit_info, |
586f9607 | 5378 | |
17cc3935 | 5379 | .get_lpage_level = svm_get_lpage_level, |
0e851880 SY |
5380 | |
5381 | .cpuid_update = svm_cpuid_update, | |
4e47c7a6 SY |
5382 | |
5383 | .rdtscp_supported = svm_rdtscp_supported, | |
ad756a16 | 5384 | .invpcid_supported = svm_invpcid_supported, |
93c4adc7 | 5385 | .mpx_supported = svm_mpx_supported, |
55412b2e | 5386 | .xsaves_supported = svm_xsaves_supported, |
d4330ef2 JR |
5387 | |
5388 | .set_supported_cpuid = svm_set_supported_cpuid, | |
f5f48ee1 SY |
5389 | |
5390 | .has_wbinvd_exit = svm_has_wbinvd_exit, | |
99e3e30a ZA |
5391 | |
5392 | .write_tsc_offset = svm_write_tsc_offset, | |
1c97f0a0 JR |
5393 | |
5394 | .set_tdp_cr3 = set_tdp_cr3, | |
8a76d7f2 JR |
5395 | |
5396 | .check_intercept = svm_check_intercept, | |
a547c6db | 5397 | .handle_external_intr = svm_handle_external_intr, |
ae97a3b8 RK |
5398 | |
5399 | .sched_in = svm_sched_in, | |
25462f7f WH |
5400 | |
5401 | .pmu_ops = &amd_pmu_ops, | |
340d3bc3 | 5402 | .deliver_posted_interrupt = svm_deliver_avic_intr, |
411b44ba | 5403 | .update_pi_irte = svm_update_pi_irte, |
6aa8b732 AK |
5404 | }; |
5405 | ||
5406 | static int __init svm_init(void) | |
5407 | { | |
cb498ea2 | 5408 | return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm), |
0ee75bea | 5409 | __alignof__(struct vcpu_svm), THIS_MODULE); |
6aa8b732 AK |
5410 | } |
5411 | ||
5412 | static void __exit svm_exit(void) | |
5413 | { | |
cb498ea2 | 5414 | kvm_exit(); |
6aa8b732 AK |
5415 | } |
5416 | ||
5417 | module_init(svm_init) | |
5418 | module_exit(svm_exit) |