1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Kernel-based Virtual Machine driver for Linux
4 *
5 * AMD SVM support
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
8 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
9 *
10 * Authors:
11 * Yaniv Kamay <yaniv@qumranet.com>
12 * Avi Kivity <avi@qumranet.com>
13 */
14
15 #ifndef __SVM_SVM_H
16 #define __SVM_SVM_H
17
18 #include <linux/kvm_types.h>
19 #include <linux/kvm_host.h>
20 #include <linux/bits.h>
21
22 #include <asm/svm.h>
23 #include <asm/sev-common.h>
24
25 #include "cpuid.h"
26 #include "kvm_cache_regs.h"
27
28 /*
29 * Helpers to convert to/from physical addresses for pages whose address is
30 * consumed directly by hardware. Even though it's a physical address, SVM
31 * often restricts the address to the natural width, hence 'unsigned long'
32 * instead of 'hpa_t'.
33 */
__sme_page_pa(struct page * page)34 static inline unsigned long __sme_page_pa(struct page *page)
35 {
36 return __sme_set(page_to_pfn(page) << PAGE_SHIFT);
37 }
38
__sme_pa_to_page(unsigned long pa)39 static inline struct page *__sme_pa_to_page(unsigned long pa)
40 {
41 return pfn_to_page(__sme_clr(pa) >> PAGE_SHIFT);
42 }
43
44 #define IOPM_SIZE PAGE_SIZE * 3
45 #define MSRPM_SIZE PAGE_SIZE * 2
46
47 #define MAX_DIRECT_ACCESS_MSRS 48
48 #define MSRPM_OFFSETS 32
49 extern u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;
50 extern bool npt_enabled;
51 extern int nrips;
52 extern int vgif;
53 extern bool intercept_smi;
54 extern bool x2avic_enabled;
55 extern bool vnmi;
56 extern int lbrv;
57
58 /*
59 * Clean bits in VMCB.
60 * VMCB_ALL_CLEAN_MASK might also need to
61 * be updated if this enum is modified.
62 */
63 enum {
64 VMCB_INTERCEPTS, /* Intercept vectors, TSC offset,
65 pause filter count */
66 VMCB_PERM_MAP, /* IOPM Base and MSRPM Base */
67 VMCB_ASID, /* ASID */
68 VMCB_INTR, /* int_ctl, int_vector */
69 VMCB_NPT, /* npt_en, nCR3, gPAT */
70 VMCB_CR, /* CR0, CR3, CR4, EFER */
71 VMCB_DR, /* DR6, DR7 */
72 VMCB_DT, /* GDT, IDT */
73 VMCB_SEG, /* CS, DS, SS, ES, CPL */
74 VMCB_CR2, /* CR2 only */
75 VMCB_LBR, /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */
76 VMCB_AVIC, /* AVIC APIC_BAR, AVIC APIC_BACKING_PAGE,
77 * AVIC PHYSICAL_TABLE pointer,
78 * AVIC LOGICAL_TABLE pointer
79 */
80 VMCB_SW = 31, /* Reserved for hypervisor/software use */
81 };
82
83 #define VMCB_ALL_CLEAN_MASK ( \
84 (1U << VMCB_INTERCEPTS) | (1U << VMCB_PERM_MAP) | \
85 (1U << VMCB_ASID) | (1U << VMCB_INTR) | \
86 (1U << VMCB_NPT) | (1U << VMCB_CR) | (1U << VMCB_DR) | \
87 (1U << VMCB_DT) | (1U << VMCB_SEG) | (1U << VMCB_CR2) | \
88 (1U << VMCB_LBR) | (1U << VMCB_AVIC) | \
89 (1U << VMCB_SW))
90
91 /* TPR and CR2 are always written before VMRUN */
92 #define VMCB_ALWAYS_DIRTY_MASK ((1U << VMCB_INTR) | (1U << VMCB_CR2))
93
94 struct kvm_sev_info {
95 bool active; /* SEV enabled guest */
96 bool es_active; /* SEV-ES enabled guest */
97 bool need_init; /* waiting for SEV_INIT2 */
98 unsigned int asid; /* ASID used for this guest */
99 unsigned int handle; /* SEV firmware handle */
100 int fd; /* SEV device fd */
101 unsigned long pages_locked; /* Number of pages locked */
102 struct list_head regions_list; /* List of registered regions */
103 u64 ap_jump_table; /* SEV-ES AP Jump Table address */
104 u64 vmsa_features;
105 u16 ghcb_version; /* Highest guest GHCB protocol version allowed */
106 struct kvm *enc_context_owner; /* Owner of copied encryption context */
107 struct list_head mirror_vms; /* List of VMs mirroring */
108 struct list_head mirror_entry; /* Use as a list entry of mirrors */
109 struct misc_cg *misc_cg; /* For misc cgroup accounting */
110 atomic_t migration_in_progress;
111 void *snp_context; /* SNP guest context page */
112 void *guest_req_buf; /* Bounce buffer for SNP Guest Request input */
113 void *guest_resp_buf; /* Bounce buffer for SNP Guest Request output */
114 struct mutex guest_req_mutex; /* Must acquire before using bounce buffers */
115 };
116
117 struct kvm_svm {
118 struct kvm kvm;
119
120 /* Struct members for AVIC */
121 u32 avic_vm_id;
122 struct page *avic_logical_id_table_page;
123 struct page *avic_physical_id_table_page;
124 struct hlist_node hnode;
125
126 struct kvm_sev_info sev_info;
127 };
128
129 struct kvm_vcpu;
130
131 struct kvm_vmcb_info {
132 struct vmcb *ptr;
133 unsigned long pa;
134 int cpu;
135 uint64_t asid_generation;
136 };
137
138 struct vmcb_save_area_cached {
139 u64 efer;
140 u64 cr4;
141 u64 cr3;
142 u64 cr0;
143 u64 dr7;
144 u64 dr6;
145 };
146
147 struct vmcb_ctrl_area_cached {
148 u32 intercepts[MAX_INTERCEPT];
149 u16 pause_filter_thresh;
150 u16 pause_filter_count;
151 u64 iopm_base_pa;
152 u64 msrpm_base_pa;
153 u64 tsc_offset;
154 u32 asid;
155 u8 tlb_ctl;
156 u32 int_ctl;
157 u32 int_vector;
158 u32 int_state;
159 u32 exit_code;
160 u32 exit_code_hi;
161 u64 exit_info_1;
162 u64 exit_info_2;
163 u32 exit_int_info;
164 u32 exit_int_info_err;
165 u64 nested_ctl;
166 u32 event_inj;
167 u32 event_inj_err;
168 u64 next_rip;
169 u64 nested_cr3;
170 u64 virt_ext;
171 u32 clean;
172 union {
173 #if IS_ENABLED(CONFIG_HYPERV) || IS_ENABLED(CONFIG_KVM_HYPERV)
174 struct hv_vmcb_enlightenments hv_enlightenments;
175 #endif
176 u8 reserved_sw[32];
177 };
178 };
179
180 struct svm_nested_state {
181 struct kvm_vmcb_info vmcb02;
182 u64 hsave_msr;
183 u64 vm_cr_msr;
184 u64 vmcb12_gpa;
185 u64 last_vmcb12_gpa;
186
187 /* These are the merged vectors */
188 u32 *msrpm;
189
190 /* A VMRUN has started but has not yet been performed, so
191 * we cannot inject a nested vmexit yet. */
192 bool nested_run_pending;
193
194 /* cache for control fields of the guest */
195 struct vmcb_ctrl_area_cached ctl;
196
197 /*
198 * Note: this struct is not kept up-to-date while L2 runs; it is only
199 * valid within nested_svm_vmrun.
200 */
201 struct vmcb_save_area_cached save;
202
203 bool initialized;
204
205 /*
206 * Indicates whether MSR bitmap for L2 needs to be rebuilt due to
207 * changes in MSR bitmap for L1 or switching to a different L2. Note,
208 * this flag can only be used reliably in conjunction with a paravirt L1
209 * which informs L0 whether any changes to MSR bitmap for L2 were done
210 * on its side.
211 */
212 bool force_msr_bitmap_recalc;
213 };
214
215 struct vcpu_sev_es_state {
216 /* SEV-ES support */
217 struct sev_es_save_area *vmsa;
218 struct ghcb *ghcb;
219 u8 valid_bitmap[16];
220 struct kvm_host_map ghcb_map;
221 bool received_first_sipi;
222 unsigned int ap_reset_hold_type;
223
224 /* SEV-ES scratch area support */
225 u64 sw_scratch;
226 void *ghcb_sa;
227 u32 ghcb_sa_len;
228 bool ghcb_sa_sync;
229 bool ghcb_sa_free;
230
231 /* SNP Page-State-Change buffer entries currently being processed */
232 u16 psc_idx;
233 u16 psc_inflight;
234 bool psc_2m;
235
236 u64 ghcb_registered_gpa;
237
238 struct mutex snp_vmsa_mutex; /* Used to handle concurrent updates of VMSA. */
239 gpa_t snp_vmsa_gpa;
240 bool snp_ap_waiting_for_reset;
241 bool snp_has_guest_vmsa;
242 };
243
244 struct vcpu_svm {
245 struct kvm_vcpu vcpu;
246 /* vmcb always points at current_vmcb->ptr, it's purely a shorthand. */
247 struct vmcb *vmcb;
248 struct kvm_vmcb_info vmcb01;
249 struct kvm_vmcb_info *current_vmcb;
250 u32 asid;
251 u32 sysenter_esp_hi;
252 u32 sysenter_eip_hi;
253 uint64_t tsc_aux;
254
255 u64 msr_decfg;
256
257 u64 next_rip;
258
259 u64 spec_ctrl;
260
261 u64 tsc_ratio_msr;
262 /*
263 * Contains guest-controlled bits of VIRT_SPEC_CTRL, which will be
264 * translated into the appropriate L2_CFG bits on the host to
265 * perform speculative control.
266 */
267 u64 virt_spec_ctrl;
268
269 u32 *msrpm;
270
271 ulong nmi_iret_rip;
272
273 struct svm_nested_state nested;
274
275 /* NMI mask value, used when vNMI is not enabled */
276 bool nmi_masked;
277
278 /*
279 * True when NMIs are still masked but guest IRET was just intercepted
280 * and KVM is waiting for RIP to change, which will signal that the
281 * intercepted IRET was retired and thus NMI can be unmasked.
282 */
283 bool awaiting_iret_completion;
284
285 /*
286 * Set when KVM is awaiting IRET completion and needs to inject NMIs as
287 * soon as the IRET completes (e.g. NMI is pending injection). KVM
288 * temporarily steals RFLAGS.TF to single-step the guest in this case
289 * in order to regain control as soon as the NMI-blocking condition
290 * goes away.
291 */
292 bool nmi_singlestep;
293 u64 nmi_singlestep_guest_rflags;
294
295 bool nmi_l1_to_l2;
296
297 unsigned long soft_int_csbase;
298 unsigned long soft_int_old_rip;
299 unsigned long soft_int_next_rip;
300 bool soft_int_injected;
301
302 u32 ldr_reg;
303 u32 dfr_reg;
304 struct page *avic_backing_page;
305 u64 *avic_physical_id_cache;
306
307 /*
308 * Per-vcpu list of struct amd_svm_iommu_ir:
309 * This is used mainly to store interrupt remapping information used
310 * when update the vcpu affinity. This avoids the need to scan for
311 * IRTE and try to match ga_tag in the IOMMU driver.
312 */
313 struct list_head ir_list;
314 spinlock_t ir_list_lock;
315
316 /* Save desired MSR intercept (read: pass-through) state */
317 struct {
318 DECLARE_BITMAP(read, MAX_DIRECT_ACCESS_MSRS);
319 DECLARE_BITMAP(write, MAX_DIRECT_ACCESS_MSRS);
320 } shadow_msr_intercept;
321
322 struct vcpu_sev_es_state sev_es;
323
324 bool guest_state_loaded;
325
326 bool x2avic_msrs_intercepted;
327
328 /* Guest GIF value, used when vGIF is not enabled */
329 bool guest_gif;
330 };
331
332 struct svm_cpu_data {
333 u64 asid_generation;
334 u32 max_asid;
335 u32 next_asid;
336 u32 min_asid;
337
338 bool bp_spec_reduce_set;
339
340 struct vmcb *save_area;
341 unsigned long save_area_pa;
342
343 struct vmcb *current_vmcb;
344
345 /* index = sev_asid, value = vmcb pointer */
346 struct vmcb **sev_vmcbs;
347 };
348
349 DECLARE_PER_CPU(struct svm_cpu_data, svm_data);
350
351 void recalc_intercepts(struct vcpu_svm *svm);
352
to_kvm_svm(struct kvm * kvm)353 static __always_inline struct kvm_svm *to_kvm_svm(struct kvm *kvm)
354 {
355 return container_of(kvm, struct kvm_svm, kvm);
356 }
357
to_kvm_sev_info(struct kvm * kvm)358 static __always_inline struct kvm_sev_info *to_kvm_sev_info(struct kvm *kvm)
359 {
360 return &to_kvm_svm(kvm)->sev_info;
361 }
362
363 #ifdef CONFIG_KVM_AMD_SEV
sev_guest(struct kvm * kvm)364 static __always_inline bool sev_guest(struct kvm *kvm)
365 {
366 return to_kvm_sev_info(kvm)->active;
367 }
sev_es_guest(struct kvm * kvm)368 static __always_inline bool sev_es_guest(struct kvm *kvm)
369 {
370 struct kvm_sev_info *sev = to_kvm_sev_info(kvm);
371
372 return sev->es_active && !WARN_ON_ONCE(!sev->active);
373 }
374
sev_snp_guest(struct kvm * kvm)375 static __always_inline bool sev_snp_guest(struct kvm *kvm)
376 {
377 struct kvm_sev_info *sev = to_kvm_sev_info(kvm);
378
379 return (sev->vmsa_features & SVM_SEV_FEAT_SNP_ACTIVE) &&
380 !WARN_ON_ONCE(!sev_es_guest(kvm));
381 }
382 #else
383 #define sev_guest(kvm) false
384 #define sev_es_guest(kvm) false
385 #define sev_snp_guest(kvm) false
386 #endif
387
ghcb_gpa_is_registered(struct vcpu_svm * svm,u64 val)388 static inline bool ghcb_gpa_is_registered(struct vcpu_svm *svm, u64 val)
389 {
390 return svm->sev_es.ghcb_registered_gpa == val;
391 }
392
vmcb_mark_all_dirty(struct vmcb * vmcb)393 static inline void vmcb_mark_all_dirty(struct vmcb *vmcb)
394 {
395 vmcb->control.clean = 0;
396 }
397
vmcb_mark_all_clean(struct vmcb * vmcb)398 static inline void vmcb_mark_all_clean(struct vmcb *vmcb)
399 {
400 vmcb->control.clean = VMCB_ALL_CLEAN_MASK
401 & ~VMCB_ALWAYS_DIRTY_MASK;
402 }
403
vmcb_mark_dirty(struct vmcb * vmcb,int bit)404 static inline void vmcb_mark_dirty(struct vmcb *vmcb, int bit)
405 {
406 vmcb->control.clean &= ~(1 << bit);
407 }
408
vmcb_is_dirty(struct vmcb * vmcb,int bit)409 static inline bool vmcb_is_dirty(struct vmcb *vmcb, int bit)
410 {
411 return !test_bit(bit, (unsigned long *)&vmcb->control.clean);
412 }
413
to_svm(struct kvm_vcpu * vcpu)414 static __always_inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
415 {
416 return container_of(vcpu, struct vcpu_svm, vcpu);
417 }
418
419 /*
420 * Only the PDPTRs are loaded on demand into the shadow MMU. All other
421 * fields are synchronized on VM-Exit, because accessing the VMCB is cheap.
422 *
423 * CR3 might be out of date in the VMCB but it is not marked dirty; instead,
424 * KVM_REQ_LOAD_MMU_PGD is always requested when the cached vcpu->arch.cr3
425 * is changed. svm_load_mmu_pgd() then syncs the new CR3 value into the VMCB.
426 */
427 #define SVM_REGS_LAZY_LOAD_SET (1 << VCPU_EXREG_PDPTR)
428
vmcb_set_intercept(struct vmcb_control_area * control,u32 bit)429 static inline void vmcb_set_intercept(struct vmcb_control_area *control, u32 bit)
430 {
431 WARN_ON_ONCE(bit >= 32 * MAX_INTERCEPT);
432 __set_bit(bit, (unsigned long *)&control->intercepts);
433 }
434
vmcb_clr_intercept(struct vmcb_control_area * control,u32 bit)435 static inline void vmcb_clr_intercept(struct vmcb_control_area *control, u32 bit)
436 {
437 WARN_ON_ONCE(bit >= 32 * MAX_INTERCEPT);
438 __clear_bit(bit, (unsigned long *)&control->intercepts);
439 }
440
vmcb_is_intercept(struct vmcb_control_area * control,u32 bit)441 static inline bool vmcb_is_intercept(struct vmcb_control_area *control, u32 bit)
442 {
443 WARN_ON_ONCE(bit >= 32 * MAX_INTERCEPT);
444 return test_bit(bit, (unsigned long *)&control->intercepts);
445 }
446
vmcb12_is_intercept(struct vmcb_ctrl_area_cached * control,u32 bit)447 static inline bool vmcb12_is_intercept(struct vmcb_ctrl_area_cached *control, u32 bit)
448 {
449 WARN_ON_ONCE(bit >= 32 * MAX_INTERCEPT);
450 return test_bit(bit, (unsigned long *)&control->intercepts);
451 }
452
set_exception_intercept(struct vcpu_svm * svm,u32 bit)453 static inline void set_exception_intercept(struct vcpu_svm *svm, u32 bit)
454 {
455 struct vmcb *vmcb = svm->vmcb01.ptr;
456
457 WARN_ON_ONCE(bit >= 32);
458 vmcb_set_intercept(&vmcb->control, INTERCEPT_EXCEPTION_OFFSET + bit);
459
460 recalc_intercepts(svm);
461 }
462
clr_exception_intercept(struct vcpu_svm * svm,u32 bit)463 static inline void clr_exception_intercept(struct vcpu_svm *svm, u32 bit)
464 {
465 struct vmcb *vmcb = svm->vmcb01.ptr;
466
467 WARN_ON_ONCE(bit >= 32);
468 vmcb_clr_intercept(&vmcb->control, INTERCEPT_EXCEPTION_OFFSET + bit);
469
470 recalc_intercepts(svm);
471 }
472
svm_set_intercept(struct vcpu_svm * svm,int bit)473 static inline void svm_set_intercept(struct vcpu_svm *svm, int bit)
474 {
475 struct vmcb *vmcb = svm->vmcb01.ptr;
476
477 vmcb_set_intercept(&vmcb->control, bit);
478
479 recalc_intercepts(svm);
480 }
481
svm_clr_intercept(struct vcpu_svm * svm,int bit)482 static inline void svm_clr_intercept(struct vcpu_svm *svm, int bit)
483 {
484 struct vmcb *vmcb = svm->vmcb01.ptr;
485
486 vmcb_clr_intercept(&vmcb->control, bit);
487
488 recalc_intercepts(svm);
489 }
490
svm_is_intercept(struct vcpu_svm * svm,int bit)491 static inline bool svm_is_intercept(struct vcpu_svm *svm, int bit)
492 {
493 return vmcb_is_intercept(&svm->vmcb->control, bit);
494 }
495
nested_vgif_enabled(struct vcpu_svm * svm)496 static inline bool nested_vgif_enabled(struct vcpu_svm *svm)
497 {
498 return guest_cpu_cap_has(&svm->vcpu, X86_FEATURE_VGIF) &&
499 (svm->nested.ctl.int_ctl & V_GIF_ENABLE_MASK);
500 }
501
get_vgif_vmcb(struct vcpu_svm * svm)502 static inline struct vmcb *get_vgif_vmcb(struct vcpu_svm *svm)
503 {
504 if (!vgif)
505 return NULL;
506
507 if (is_guest_mode(&svm->vcpu) && !nested_vgif_enabled(svm))
508 return svm->nested.vmcb02.ptr;
509 else
510 return svm->vmcb01.ptr;
511 }
512
enable_gif(struct vcpu_svm * svm)513 static inline void enable_gif(struct vcpu_svm *svm)
514 {
515 struct vmcb *vmcb = get_vgif_vmcb(svm);
516
517 if (vmcb)
518 vmcb->control.int_ctl |= V_GIF_MASK;
519 else
520 svm->guest_gif = true;
521 }
522
disable_gif(struct vcpu_svm * svm)523 static inline void disable_gif(struct vcpu_svm *svm)
524 {
525 struct vmcb *vmcb = get_vgif_vmcb(svm);
526
527 if (vmcb)
528 vmcb->control.int_ctl &= ~V_GIF_MASK;
529 else
530 svm->guest_gif = false;
531 }
532
gif_set(struct vcpu_svm * svm)533 static inline bool gif_set(struct vcpu_svm *svm)
534 {
535 struct vmcb *vmcb = get_vgif_vmcb(svm);
536
537 if (vmcb)
538 return !!(vmcb->control.int_ctl & V_GIF_MASK);
539 else
540 return svm->guest_gif;
541 }
542
nested_npt_enabled(struct vcpu_svm * svm)543 static inline bool nested_npt_enabled(struct vcpu_svm *svm)
544 {
545 return svm->nested.ctl.nested_ctl & SVM_NESTED_CTL_NP_ENABLE;
546 }
547
nested_vnmi_enabled(struct vcpu_svm * svm)548 static inline bool nested_vnmi_enabled(struct vcpu_svm *svm)
549 {
550 return guest_cpu_cap_has(&svm->vcpu, X86_FEATURE_VNMI) &&
551 (svm->nested.ctl.int_ctl & V_NMI_ENABLE_MASK);
552 }
553
is_x2apic_msrpm_offset(u32 offset)554 static inline bool is_x2apic_msrpm_offset(u32 offset)
555 {
556 /* 4 msrs per u8, and 4 u8 in u32 */
557 u32 msr = offset * 16;
558
559 return (msr >= APIC_BASE_MSR) &&
560 (msr < (APIC_BASE_MSR + 0x100));
561 }
562
get_vnmi_vmcb_l1(struct vcpu_svm * svm)563 static inline struct vmcb *get_vnmi_vmcb_l1(struct vcpu_svm *svm)
564 {
565 if (!vnmi)
566 return NULL;
567
568 if (is_guest_mode(&svm->vcpu))
569 return NULL;
570 else
571 return svm->vmcb01.ptr;
572 }
573
is_vnmi_enabled(struct vcpu_svm * svm)574 static inline bool is_vnmi_enabled(struct vcpu_svm *svm)
575 {
576 struct vmcb *vmcb = get_vnmi_vmcb_l1(svm);
577
578 if (vmcb)
579 return !!(vmcb->control.int_ctl & V_NMI_ENABLE_MASK);
580 else
581 return false;
582 }
583
svm_vmgexit_set_return_code(struct vcpu_svm * svm,u64 response,u64 data)584 static inline void svm_vmgexit_set_return_code(struct vcpu_svm *svm,
585 u64 response, u64 data)
586 {
587 ghcb_set_sw_exit_info_1(svm->sev_es.ghcb, response);
588 ghcb_set_sw_exit_info_2(svm->sev_es.ghcb, data);
589 }
590
svm_vmgexit_inject_exception(struct vcpu_svm * svm,u8 vector)591 static inline void svm_vmgexit_inject_exception(struct vcpu_svm *svm, u8 vector)
592 {
593 u64 data = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_EXEPT | vector;
594
595 svm_vmgexit_set_return_code(svm, GHCB_HV_RESP_ISSUE_EXCEPTION, data);
596 }
597
svm_vmgexit_bad_input(struct vcpu_svm * svm,u64 suberror)598 static inline void svm_vmgexit_bad_input(struct vcpu_svm *svm, u64 suberror)
599 {
600 svm_vmgexit_set_return_code(svm, GHCB_HV_RESP_MALFORMED_INPUT, suberror);
601 }
602
svm_vmgexit_success(struct vcpu_svm * svm,u64 data)603 static inline void svm_vmgexit_success(struct vcpu_svm *svm, u64 data)
604 {
605 svm_vmgexit_set_return_code(svm, GHCB_HV_RESP_NO_ACTION, data);
606 }
607
svm_vmgexit_no_action(struct vcpu_svm * svm,u64 data)608 static inline void svm_vmgexit_no_action(struct vcpu_svm *svm, u64 data)
609 {
610 svm_vmgexit_set_return_code(svm, GHCB_HV_RESP_NO_ACTION, data);
611 }
612
613 /* svm.c */
614 #define MSR_INVALID 0xffffffffU
615
616 #define DEBUGCTL_RESERVED_BITS (~DEBUGCTLMSR_LBR)
617
618 extern bool dump_invalid_vmcb;
619
620 u32 svm_msrpm_offset(u32 msr);
621 u32 *svm_vcpu_alloc_msrpm(void);
622 void svm_vcpu_init_msrpm(struct kvm_vcpu *vcpu, u32 *msrpm);
623 void svm_vcpu_free_msrpm(u32 *msrpm);
624 void svm_copy_lbrs(struct vmcb *to_vmcb, struct vmcb *from_vmcb);
625 void svm_enable_lbrv(struct kvm_vcpu *vcpu);
626 void svm_update_lbrv(struct kvm_vcpu *vcpu);
627
628 int svm_set_efer(struct kvm_vcpu *vcpu, u64 efer);
629 void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
630 void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
631 void disable_nmi_singlestep(struct vcpu_svm *svm);
632 bool svm_smi_blocked(struct kvm_vcpu *vcpu);
633 bool svm_nmi_blocked(struct kvm_vcpu *vcpu);
634 bool svm_interrupt_blocked(struct kvm_vcpu *vcpu);
635 void svm_set_gif(struct vcpu_svm *svm, bool value);
636 int svm_invoke_exit_handler(struct kvm_vcpu *vcpu, u64 exit_code);
637 void set_msr_interception(struct kvm_vcpu *vcpu, u32 *msrpm, u32 msr,
638 int read, int write);
639 void svm_set_x2apic_msr_interception(struct vcpu_svm *svm, bool disable);
640 void svm_complete_interrupt_delivery(struct kvm_vcpu *vcpu, int delivery_mode,
641 int trig_mode, int vec);
642
643 /* nested.c */
644
645 #define NESTED_EXIT_HOST 0 /* Exit handled on host level */
646 #define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */
647 #define NESTED_EXIT_CONTINUE 2 /* Further checks needed */
648
nested_svm_virtualize_tpr(struct kvm_vcpu * vcpu)649 static inline bool nested_svm_virtualize_tpr(struct kvm_vcpu *vcpu)
650 {
651 struct vcpu_svm *svm = to_svm(vcpu);
652
653 return is_guest_mode(vcpu) && (svm->nested.ctl.int_ctl & V_INTR_MASKING_MASK);
654 }
655
nested_exit_on_smi(struct vcpu_svm * svm)656 static inline bool nested_exit_on_smi(struct vcpu_svm *svm)
657 {
658 return vmcb12_is_intercept(&svm->nested.ctl, INTERCEPT_SMI);
659 }
660
nested_exit_on_intr(struct vcpu_svm * svm)661 static inline bool nested_exit_on_intr(struct vcpu_svm *svm)
662 {
663 return vmcb12_is_intercept(&svm->nested.ctl, INTERCEPT_INTR);
664 }
665
nested_exit_on_nmi(struct vcpu_svm * svm)666 static inline bool nested_exit_on_nmi(struct vcpu_svm *svm)
667 {
668 return vmcb12_is_intercept(&svm->nested.ctl, INTERCEPT_NMI);
669 }
670
671 int enter_svm_guest_mode(struct kvm_vcpu *vcpu,
672 u64 vmcb_gpa, struct vmcb *vmcb12, bool from_vmrun);
673 void svm_leave_nested(struct kvm_vcpu *vcpu);
674 void svm_free_nested(struct vcpu_svm *svm);
675 int svm_allocate_nested(struct vcpu_svm *svm);
676 int nested_svm_vmrun(struct kvm_vcpu *vcpu);
677 void svm_copy_vmrun_state(struct vmcb_save_area *to_save,
678 struct vmcb_save_area *from_save);
679 void svm_copy_vmloadsave_state(struct vmcb *to_vmcb, struct vmcb *from_vmcb);
680 int nested_svm_vmexit(struct vcpu_svm *svm);
681
nested_svm_simple_vmexit(struct vcpu_svm * svm,u32 exit_code)682 static inline int nested_svm_simple_vmexit(struct vcpu_svm *svm, u32 exit_code)
683 {
684 svm->vmcb->control.exit_code = exit_code;
685 svm->vmcb->control.exit_info_1 = 0;
686 svm->vmcb->control.exit_info_2 = 0;
687 return nested_svm_vmexit(svm);
688 }
689
690 int nested_svm_exit_handled(struct vcpu_svm *svm);
691 int nested_svm_check_permissions(struct kvm_vcpu *vcpu);
692 int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
693 bool has_error_code, u32 error_code);
694 int nested_svm_exit_special(struct vcpu_svm *svm);
695 void nested_svm_update_tsc_ratio_msr(struct kvm_vcpu *vcpu);
696 void svm_write_tsc_multiplier(struct kvm_vcpu *vcpu);
697 void nested_copy_vmcb_control_to_cache(struct vcpu_svm *svm,
698 struct vmcb_control_area *control);
699 void nested_copy_vmcb_save_to_cache(struct vcpu_svm *svm,
700 struct vmcb_save_area *save);
701 void nested_sync_control_from_vmcb02(struct vcpu_svm *svm);
702 void nested_vmcb02_compute_g_pat(struct vcpu_svm *svm);
703 void svm_switch_vmcb(struct vcpu_svm *svm, struct kvm_vmcb_info *target_vmcb);
704
705 extern struct kvm_x86_nested_ops svm_nested_ops;
706
707 /* avic.c */
708 #define AVIC_REQUIRED_APICV_INHIBITS \
709 ( \
710 BIT(APICV_INHIBIT_REASON_DISABLED) | \
711 BIT(APICV_INHIBIT_REASON_ABSENT) | \
712 BIT(APICV_INHIBIT_REASON_HYPERV) | \
713 BIT(APICV_INHIBIT_REASON_NESTED) | \
714 BIT(APICV_INHIBIT_REASON_IRQWIN) | \
715 BIT(APICV_INHIBIT_REASON_PIT_REINJ) | \
716 BIT(APICV_INHIBIT_REASON_BLOCKIRQ) | \
717 BIT(APICV_INHIBIT_REASON_SEV) | \
718 BIT(APICV_INHIBIT_REASON_PHYSICAL_ID_ALIASED) | \
719 BIT(APICV_INHIBIT_REASON_APIC_ID_MODIFIED) | \
720 BIT(APICV_INHIBIT_REASON_APIC_BASE_MODIFIED) | \
721 BIT(APICV_INHIBIT_REASON_LOGICAL_ID_ALIASED) \
722 )
723
724 bool avic_hardware_setup(void);
725 int avic_ga_log_notifier(u32 ga_tag);
726 void avic_vm_destroy(struct kvm *kvm);
727 int avic_vm_init(struct kvm *kvm);
728 void avic_init_vmcb(struct vcpu_svm *svm, struct vmcb *vmcb);
729 int avic_incomplete_ipi_interception(struct kvm_vcpu *vcpu);
730 int avic_unaccelerated_access_interception(struct kvm_vcpu *vcpu);
731 int avic_init_vcpu(struct vcpu_svm *svm);
732 void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
733 void avic_vcpu_put(struct kvm_vcpu *vcpu);
734 void avic_apicv_post_state_restore(struct kvm_vcpu *vcpu);
735 void avic_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu);
736 int avic_pi_update_irte(struct kvm *kvm, unsigned int host_irq,
737 uint32_t guest_irq, bool set);
738 void avic_vcpu_blocking(struct kvm_vcpu *vcpu);
739 void avic_vcpu_unblocking(struct kvm_vcpu *vcpu);
740 void avic_ring_doorbell(struct kvm_vcpu *vcpu);
741 unsigned long avic_vcpu_get_apicv_inhibit_reasons(struct kvm_vcpu *vcpu);
742 void avic_refresh_virtual_apic_mode(struct kvm_vcpu *vcpu);
743
744
745 /* sev.c */
746
747 int pre_sev_run(struct vcpu_svm *svm, int cpu);
748 void sev_init_vmcb(struct vcpu_svm *svm);
749 void sev_vcpu_after_set_cpuid(struct vcpu_svm *svm);
750 int sev_es_string_io(struct vcpu_svm *svm, int size, unsigned int port, int in);
751 void sev_es_vcpu_reset(struct vcpu_svm *svm);
752 void sev_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector);
753 void sev_es_prepare_switch_to_guest(struct vcpu_svm *svm, struct sev_es_save_area *hostsa);
754 void sev_es_unmap_ghcb(struct vcpu_svm *svm);
755
756 #ifdef CONFIG_KVM_AMD_SEV
757 int sev_mem_enc_ioctl(struct kvm *kvm, void __user *argp);
758 int sev_mem_enc_register_region(struct kvm *kvm,
759 struct kvm_enc_region *range);
760 int sev_mem_enc_unregister_region(struct kvm *kvm,
761 struct kvm_enc_region *range);
762 int sev_vm_copy_enc_context_from(struct kvm *kvm, unsigned int source_fd);
763 int sev_vm_move_enc_context_from(struct kvm *kvm, unsigned int source_fd);
764 void sev_guest_memory_reclaimed(struct kvm *kvm);
765 int sev_handle_vmgexit(struct kvm_vcpu *vcpu);
766
767 /* These symbols are used in common code and are stubbed below. */
768
769 struct page *snp_safe_alloc_page_node(int node, gfp_t gfp);
snp_safe_alloc_page(void)770 static inline struct page *snp_safe_alloc_page(void)
771 {
772 return snp_safe_alloc_page_node(numa_node_id(), GFP_KERNEL_ACCOUNT);
773 }
774
775 void sev_free_vcpu(struct kvm_vcpu *vcpu);
776 void sev_vm_destroy(struct kvm *kvm);
777 void __init sev_set_cpu_caps(void);
778 void __init sev_hardware_setup(void);
779 void sev_hardware_unsetup(void);
780 int sev_cpu_init(struct svm_cpu_data *sd);
781 int sev_dev_get_attr(u32 group, u64 attr, u64 *val);
782 extern unsigned int max_sev_asid;
783 void sev_handle_rmp_fault(struct kvm_vcpu *vcpu, gpa_t gpa, u64 error_code);
784 void sev_snp_init_protected_guest_state(struct kvm_vcpu *vcpu);
785 int sev_gmem_prepare(struct kvm *kvm, kvm_pfn_t pfn, gfn_t gfn, int max_order);
786 void sev_gmem_invalidate(kvm_pfn_t start, kvm_pfn_t end);
787 int sev_private_max_mapping_level(struct kvm *kvm, kvm_pfn_t pfn);
788 #else
snp_safe_alloc_page_node(int node,gfp_t gfp)789 static inline struct page *snp_safe_alloc_page_node(int node, gfp_t gfp)
790 {
791 return alloc_pages_node(node, gfp | __GFP_ZERO, 0);
792 }
793
snp_safe_alloc_page(void)794 static inline struct page *snp_safe_alloc_page(void)
795 {
796 return snp_safe_alloc_page_node(numa_node_id(), GFP_KERNEL_ACCOUNT);
797 }
798
sev_free_vcpu(struct kvm_vcpu * vcpu)799 static inline void sev_free_vcpu(struct kvm_vcpu *vcpu) {}
sev_vm_destroy(struct kvm * kvm)800 static inline void sev_vm_destroy(struct kvm *kvm) {}
sev_set_cpu_caps(void)801 static inline void __init sev_set_cpu_caps(void) {}
sev_hardware_setup(void)802 static inline void __init sev_hardware_setup(void) {}
sev_hardware_unsetup(void)803 static inline void sev_hardware_unsetup(void) {}
sev_cpu_init(struct svm_cpu_data * sd)804 static inline int sev_cpu_init(struct svm_cpu_data *sd) { return 0; }
sev_dev_get_attr(u32 group,u64 attr,u64 * val)805 static inline int sev_dev_get_attr(u32 group, u64 attr, u64 *val) { return -ENXIO; }
806 #define max_sev_asid 0
sev_handle_rmp_fault(struct kvm_vcpu * vcpu,gpa_t gpa,u64 error_code)807 static inline void sev_handle_rmp_fault(struct kvm_vcpu *vcpu, gpa_t gpa, u64 error_code) {}
sev_snp_init_protected_guest_state(struct kvm_vcpu * vcpu)808 static inline void sev_snp_init_protected_guest_state(struct kvm_vcpu *vcpu) {}
sev_gmem_prepare(struct kvm * kvm,kvm_pfn_t pfn,gfn_t gfn,int max_order)809 static inline int sev_gmem_prepare(struct kvm *kvm, kvm_pfn_t pfn, gfn_t gfn, int max_order)
810 {
811 return 0;
812 }
sev_gmem_invalidate(kvm_pfn_t start,kvm_pfn_t end)813 static inline void sev_gmem_invalidate(kvm_pfn_t start, kvm_pfn_t end) {}
sev_private_max_mapping_level(struct kvm * kvm,kvm_pfn_t pfn)814 static inline int sev_private_max_mapping_level(struct kvm *kvm, kvm_pfn_t pfn)
815 {
816 return 0;
817 }
818
819 #endif
820
821 /* vmenter.S */
822
823 void __svm_sev_es_vcpu_run(struct vcpu_svm *svm, bool spec_ctrl_intercepted,
824 struct sev_es_save_area *hostsa);
825 void __svm_vcpu_run(struct vcpu_svm *svm, bool spec_ctrl_intercepted);
826
827 #define DEFINE_KVM_GHCB_ACCESSORS(field) \
828 static __always_inline bool kvm_ghcb_##field##_is_valid(const struct vcpu_svm *svm) \
829 { \
830 return test_bit(GHCB_BITMAP_IDX(field), \
831 (unsigned long *)&svm->sev_es.valid_bitmap); \
832 } \
833 \
834 static __always_inline u64 kvm_ghcb_get_##field##_if_valid(struct vcpu_svm *svm, struct ghcb *ghcb) \
835 { \
836 return kvm_ghcb_##field##_is_valid(svm) ? ghcb->save.field : 0; \
837 } \
838
839 DEFINE_KVM_GHCB_ACCESSORS(cpl)
840 DEFINE_KVM_GHCB_ACCESSORS(rax)
841 DEFINE_KVM_GHCB_ACCESSORS(rcx)
842 DEFINE_KVM_GHCB_ACCESSORS(rdx)
843 DEFINE_KVM_GHCB_ACCESSORS(rbx)
844 DEFINE_KVM_GHCB_ACCESSORS(rsi)
845 DEFINE_KVM_GHCB_ACCESSORS(sw_exit_code)
846 DEFINE_KVM_GHCB_ACCESSORS(sw_exit_info_1)
847 DEFINE_KVM_GHCB_ACCESSORS(sw_exit_info_2)
848 DEFINE_KVM_GHCB_ACCESSORS(sw_scratch)
849 DEFINE_KVM_GHCB_ACCESSORS(xcr0)
850
851 #endif
852