1 // SPDX-License-Identifier: GPL-2.0-only
3 * Kernel-based Virtual Machine driver for Linux
7 * Copyright (C) 2006 Qumranet, Inc.
8 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
11 * Yaniv Kamay <yaniv@qumranet.com>
12 * Avi Kivity <avi@qumranet.com>
15 #define pr_fmt(fmt) "SVM: " fmt
17 #include <linux/kvm_host.h>
21 #include "kvm_cache_regs.h"
26 #include <linux/module.h>
27 #include <linux/mod_devicetable.h>
28 #include <linux/kernel.h>
29 #include <linux/vmalloc.h>
30 #include <linux/highmem.h>
31 #include <linux/sched.h>
32 #include <linux/trace_events.h>
33 #include <linux/slab.h>
34 #include <linux/amd-iommu.h>
35 #include <linux/hashtable.h>
36 #include <linux/frame.h>
37 #include <linux/psp-sev.h>
38 #include <linux/file.h>
39 #include <linux/pagemap.h>
40 #include <linux/swap.h>
43 #include <asm/perf_event.h>
44 #include <asm/tlbflush.h>
46 #include <asm/debugreg.h>
47 #include <asm/kvm_para.h>
48 #include <asm/irq_remapping.h>
49 #include <asm/spec-ctrl.h>
51 #include <asm/virtext.h>
54 #define __ex(x) __kvm_handle_fault_on_reboot(x)
56 MODULE_AUTHOR("Qumranet");
57 MODULE_LICENSE("GPL");
59 static const struct x86_cpu_id svm_cpu_id[] = {
60 X86_FEATURE_MATCH(X86_FEATURE_SVM),
63 MODULE_DEVICE_TABLE(x86cpu, svm_cpu_id);
65 #define IOPM_ALLOC_ORDER 2
66 #define MSRPM_ALLOC_ORDER 1
68 #define SEG_TYPE_LDT 2
69 #define SEG_TYPE_BUSY_TSS16 3
71 #define SVM_FEATURE_LBRV (1 << 1)
72 #define SVM_FEATURE_SVML (1 << 2)
73 #define SVM_FEATURE_TSC_RATE (1 << 4)
74 #define SVM_FEATURE_VMCB_CLEAN (1 << 5)
75 #define SVM_FEATURE_FLUSH_ASID (1 << 6)
76 #define SVM_FEATURE_DECODE_ASSIST (1 << 7)
77 #define SVM_FEATURE_PAUSE_FILTER (1 << 10)
79 #define SVM_AVIC_DOORBELL 0xc001011b
81 #define NESTED_EXIT_HOST 0 /* Exit handled on host level */
82 #define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */
83 #define NESTED_EXIT_CONTINUE 2 /* Further checks needed */
85 #define DEBUGCTL_RESERVED_BITS (~(0x3fULL))
87 #define TSC_RATIO_RSVD 0xffffff0000000000ULL
88 #define TSC_RATIO_MIN 0x0000000000000001ULL
89 #define TSC_RATIO_MAX 0x000000ffffffffffULL
91 #define AVIC_HPA_MASK ~((0xFFFULL << 52) | 0xFFF)
94 * 0xff is broadcast, so the max index allowed for physical APIC ID
95 * table is 0xfe. APIC IDs above 0xff are reserved.
97 #define AVIC_MAX_PHYSICAL_ID_COUNT 255
99 #define AVIC_UNACCEL_ACCESS_WRITE_MASK 1
100 #define AVIC_UNACCEL_ACCESS_OFFSET_MASK 0xFF0
101 #define AVIC_UNACCEL_ACCESS_VECTOR_MASK 0xFFFFFFFF
103 /* AVIC GATAG is encoded using VM and VCPU IDs */
104 #define AVIC_VCPU_ID_BITS 8
105 #define AVIC_VCPU_ID_MASK ((1 << AVIC_VCPU_ID_BITS) - 1)
107 #define AVIC_VM_ID_BITS 24
108 #define AVIC_VM_ID_NR (1 << AVIC_VM_ID_BITS)
109 #define AVIC_VM_ID_MASK ((1 << AVIC_VM_ID_BITS) - 1)
111 #define AVIC_GATAG(x, y) (((x & AVIC_VM_ID_MASK) << AVIC_VCPU_ID_BITS) | \
112 (y & AVIC_VCPU_ID_MASK))
113 #define AVIC_GATAG_TO_VMID(x) ((x >> AVIC_VCPU_ID_BITS) & AVIC_VM_ID_MASK)
114 #define AVIC_GATAG_TO_VCPUID(x) (x & AVIC_VCPU_ID_MASK)
116 static bool erratum_383_found __read_mostly;
118 static const u32 host_save_user_msrs[] = {
120 MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE,
123 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
127 #define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)
129 struct kvm_sev_info {
130 bool active; /* SEV enabled guest */
131 unsigned int asid; /* ASID used for this guest */
132 unsigned int handle; /* SEV firmware handle */
133 int fd; /* SEV device fd */
134 unsigned long pages_locked; /* Number of pages locked */
135 struct list_head regions_list; /* List of registered regions */
141 /* Struct members for AVIC */
143 struct page *avic_logical_id_table_page;
144 struct page *avic_physical_id_table_page;
145 struct hlist_node hnode;
147 struct kvm_sev_info sev_info;
152 struct nested_state {
158 /* These are the merged vectors */
161 /* gpa pointers to the real vectors */
165 /* A VMEXIT is required but not yet emulated */
168 /* cache for intercepts of the guest */
171 u32 intercept_exceptions;
174 /* Nested Paging related state */
178 #define MSRPM_OFFSETS 16
179 static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;
182 * Set osvw_len to higher value when updated Revision Guides
183 * are published and we know what the new status bits are
185 static uint64_t osvw_len = 4, osvw_status;
188 struct kvm_vcpu vcpu;
190 unsigned long vmcb_pa;
191 struct svm_cpu_data *svm_data;
192 uint64_t asid_generation;
193 uint64_t sysenter_esp;
194 uint64_t sysenter_eip;
201 u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS];
211 * Contains guest-controlled bits of VIRT_SPEC_CTRL, which will be
212 * translated into the appropriate L2_CFG bits on the host to
213 * perform speculative control.
221 struct nested_state nested;
224 u64 nmi_singlestep_guest_rflags;
226 unsigned int3_injected;
227 unsigned long int3_rip;
229 /* cached guest cpuid flags for faster access */
230 bool nrips_enabled : 1;
234 struct page *avic_backing_page;
235 u64 *avic_physical_id_cache;
236 bool avic_is_running;
239 * Per-vcpu list of struct amd_svm_iommu_ir:
240 * This is used mainly to store interrupt remapping information used
241 * when update the vcpu affinity. This avoids the need to scan for
242 * IRTE and try to match ga_tag in the IOMMU driver.
244 struct list_head ir_list;
245 spinlock_t ir_list_lock;
247 /* which host CPU was used for running this vcpu */
248 unsigned int last_cpu;
252 * This is a wrapper of struct amd_iommu_ir_data.
254 struct amd_svm_iommu_ir {
255 struct list_head node; /* Used by SVM for per-vcpu ir_list */
256 void *data; /* Storing pointer to struct amd_ir_data */
259 #define AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK (0xFF)
260 #define AVIC_LOGICAL_ID_ENTRY_VALID_BIT 31
261 #define AVIC_LOGICAL_ID_ENTRY_VALID_MASK (1 << 31)
263 #define AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK (0xFFULL)
264 #define AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK (0xFFFFFFFFFFULL << 12)
265 #define AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK (1ULL << 62)
266 #define AVIC_PHYSICAL_ID_ENTRY_VALID_MASK (1ULL << 63)
268 static DEFINE_PER_CPU(u64, current_tsc_ratio);
269 #define TSC_RATIO_DEFAULT 0x0100000000ULL
271 #define MSR_INVALID 0xffffffffU
273 static const struct svm_direct_access_msrs {
274 u32 index; /* Index of the MSR */
275 bool always; /* True if intercept is always on */
276 } direct_access_msrs[] = {
277 { .index = MSR_STAR, .always = true },
278 { .index = MSR_IA32_SYSENTER_CS, .always = true },
280 { .index = MSR_GS_BASE, .always = true },
281 { .index = MSR_FS_BASE, .always = true },
282 { .index = MSR_KERNEL_GS_BASE, .always = true },
283 { .index = MSR_LSTAR, .always = true },
284 { .index = MSR_CSTAR, .always = true },
285 { .index = MSR_SYSCALL_MASK, .always = true },
287 { .index = MSR_IA32_SPEC_CTRL, .always = false },
288 { .index = MSR_IA32_PRED_CMD, .always = false },
289 { .index = MSR_IA32_LASTBRANCHFROMIP, .always = false },
290 { .index = MSR_IA32_LASTBRANCHTOIP, .always = false },
291 { .index = MSR_IA32_LASTINTFROMIP, .always = false },
292 { .index = MSR_IA32_LASTINTTOIP, .always = false },
293 { .index = MSR_INVALID, .always = false },
296 /* enable NPT for AMD64 and X86 with PAE */
297 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
298 static bool npt_enabled = true;
300 static bool npt_enabled;
304 * These 2 parameters are used to config the controls for Pause-Loop Exiting:
305 * pause_filter_count: On processors that support Pause filtering(indicated
306 * by CPUID Fn8000_000A_EDX), the VMCB provides a 16 bit pause filter
307 * count value. On VMRUN this value is loaded into an internal counter.
308 * Each time a pause instruction is executed, this counter is decremented
309 * until it reaches zero at which time a #VMEXIT is generated if pause
310 * intercept is enabled. Refer to AMD APM Vol 2 Section 15.14.4 Pause
311 * Intercept Filtering for more details.
312 * This also indicate if ple logic enabled.
314 * pause_filter_thresh: In addition, some processor families support advanced
315 * pause filtering (indicated by CPUID Fn8000_000A_EDX) upper bound on
316 * the amount of time a guest is allowed to execute in a pause loop.
317 * In this mode, a 16-bit pause filter threshold field is added in the
318 * VMCB. The threshold value is a cycle count that is used to reset the
319 * pause counter. As with simple pause filtering, VMRUN loads the pause
320 * count value from VMCB into an internal counter. Then, on each pause
321 * instruction the hardware checks the elapsed number of cycles since
322 * the most recent pause instruction against the pause filter threshold.
323 * If the elapsed cycle count is greater than the pause filter threshold,
324 * then the internal pause count is reloaded from the VMCB and execution
325 * continues. If the elapsed cycle count is less than the pause filter
326 * threshold, then the internal pause count is decremented. If the count
327 * value is less than zero and PAUSE intercept is enabled, a #VMEXIT is
328 * triggered. If advanced pause filtering is supported and pause filter
329 * threshold field is set to zero, the filter will operate in the simpler,
333 static unsigned short pause_filter_thresh = KVM_DEFAULT_PLE_GAP;
334 module_param(pause_filter_thresh, ushort, 0444);
336 static unsigned short pause_filter_count = KVM_SVM_DEFAULT_PLE_WINDOW;
337 module_param(pause_filter_count, ushort, 0444);
339 /* Default doubles per-vcpu window every exit. */
340 static unsigned short pause_filter_count_grow = KVM_DEFAULT_PLE_WINDOW_GROW;
341 module_param(pause_filter_count_grow, ushort, 0444);
343 /* Default resets per-vcpu window every exit to pause_filter_count. */
344 static unsigned short pause_filter_count_shrink = KVM_DEFAULT_PLE_WINDOW_SHRINK;
345 module_param(pause_filter_count_shrink, ushort, 0444);
347 /* Default is to compute the maximum so we can never overflow. */
348 static unsigned short pause_filter_count_max = KVM_SVM_DEFAULT_PLE_WINDOW_MAX;
349 module_param(pause_filter_count_max, ushort, 0444);
351 /* allow nested paging (virtualized MMU) for all guests */
352 static int npt = true;
353 module_param(npt, int, S_IRUGO);
355 /* allow nested virtualization in KVM/SVM */
356 static int nested = true;
357 module_param(nested, int, S_IRUGO);
359 /* enable / disable AVIC */
361 #ifdef CONFIG_X86_LOCAL_APIC
362 module_param(avic, int, S_IRUGO);
365 /* enable/disable Next RIP Save */
366 static int nrips = true;
367 module_param(nrips, int, 0444);
369 /* enable/disable Virtual VMLOAD VMSAVE */
370 static int vls = true;
371 module_param(vls, int, 0444);
373 /* enable/disable Virtual GIF */
374 static int vgif = true;
375 module_param(vgif, int, 0444);
377 /* enable/disable SEV support */
378 static int sev = IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT);
379 module_param(sev, int, 0444);
381 static bool __read_mostly dump_invalid_vmcb = 0;
382 module_param(dump_invalid_vmcb, bool, 0644);
384 static u8 rsm_ins_bytes[] = "\x0f\xaa";
386 static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
387 static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa);
388 static void svm_complete_interrupts(struct vcpu_svm *svm);
390 static int nested_svm_exit_handled(struct vcpu_svm *svm);
391 static int nested_svm_intercept(struct vcpu_svm *svm);
392 static int nested_svm_vmexit(struct vcpu_svm *svm);
393 static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
394 bool has_error_code, u32 error_code);
397 VMCB_INTERCEPTS, /* Intercept vectors, TSC offset,
398 pause filter count */
399 VMCB_PERM_MAP, /* IOPM Base and MSRPM Base */
400 VMCB_ASID, /* ASID */
401 VMCB_INTR, /* int_ctl, int_vector */
402 VMCB_NPT, /* npt_en, nCR3, gPAT */
403 VMCB_CR, /* CR0, CR3, CR4, EFER */
404 VMCB_DR, /* DR6, DR7 */
405 VMCB_DT, /* GDT, IDT */
406 VMCB_SEG, /* CS, DS, SS, ES, CPL */
407 VMCB_CR2, /* CR2 only */
408 VMCB_LBR, /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */
409 VMCB_AVIC, /* AVIC APIC_BAR, AVIC APIC_BACKING_PAGE,
410 * AVIC PHYSICAL_TABLE pointer,
411 * AVIC LOGICAL_TABLE pointer
416 /* TPR and CR2 are always written before VMRUN */
417 #define VMCB_ALWAYS_DIRTY_MASK ((1U << VMCB_INTR) | (1U << VMCB_CR2))
419 #define VMCB_AVIC_APIC_BAR_MASK 0xFFFFFFFFFF000ULL
421 static unsigned int max_sev_asid;
422 static unsigned int min_sev_asid;
423 static unsigned long *sev_asid_bitmap;
424 #define __sme_page_pa(x) __sme_set(page_to_pfn(x) << PAGE_SHIFT)
427 struct list_head list;
428 unsigned long npages;
435 static inline struct kvm_svm *to_kvm_svm(struct kvm *kvm)
437 return container_of(kvm, struct kvm_svm, kvm);
440 static inline bool svm_sev_enabled(void)
442 return IS_ENABLED(CONFIG_KVM_AMD_SEV) ? max_sev_asid : 0;
445 static inline bool sev_guest(struct kvm *kvm)
447 #ifdef CONFIG_KVM_AMD_SEV
448 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
456 static inline int sev_get_asid(struct kvm *kvm)
458 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
463 static inline void mark_all_dirty(struct vmcb *vmcb)
465 vmcb->control.clean = 0;
468 static inline void mark_all_clean(struct vmcb *vmcb)
470 vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1)
471 & ~VMCB_ALWAYS_DIRTY_MASK;
474 static inline void mark_dirty(struct vmcb *vmcb, int bit)
476 vmcb->control.clean &= ~(1 << bit);
479 static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
481 return container_of(vcpu, struct vcpu_svm, vcpu);
484 static inline void avic_update_vapic_bar(struct vcpu_svm *svm, u64 data)
486 svm->vmcb->control.avic_vapic_bar = data & VMCB_AVIC_APIC_BAR_MASK;
487 mark_dirty(svm->vmcb, VMCB_AVIC);
490 static inline bool avic_vcpu_is_running(struct kvm_vcpu *vcpu)
492 struct vcpu_svm *svm = to_svm(vcpu);
493 u64 *entry = svm->avic_physical_id_cache;
498 return (READ_ONCE(*entry) & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK);
501 static void recalc_intercepts(struct vcpu_svm *svm)
503 struct vmcb_control_area *c, *h;
504 struct nested_state *g;
506 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
508 if (!is_guest_mode(&svm->vcpu))
511 c = &svm->vmcb->control;
512 h = &svm->nested.hsave->control;
515 c->intercept_cr = h->intercept_cr | g->intercept_cr;
516 c->intercept_dr = h->intercept_dr | g->intercept_dr;
517 c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions;
518 c->intercept = h->intercept | g->intercept;
521 static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm)
523 if (is_guest_mode(&svm->vcpu))
524 return svm->nested.hsave;
529 static inline void set_cr_intercept(struct vcpu_svm *svm, int bit)
531 struct vmcb *vmcb = get_host_vmcb(svm);
533 vmcb->control.intercept_cr |= (1U << bit);
535 recalc_intercepts(svm);
538 static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit)
540 struct vmcb *vmcb = get_host_vmcb(svm);
542 vmcb->control.intercept_cr &= ~(1U << bit);
544 recalc_intercepts(svm);
547 static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit)
549 struct vmcb *vmcb = get_host_vmcb(svm);
551 return vmcb->control.intercept_cr & (1U << bit);
554 static inline void set_dr_intercepts(struct vcpu_svm *svm)
556 struct vmcb *vmcb = get_host_vmcb(svm);
558 vmcb->control.intercept_dr = (1 << INTERCEPT_DR0_READ)
559 | (1 << INTERCEPT_DR1_READ)
560 | (1 << INTERCEPT_DR2_READ)
561 | (1 << INTERCEPT_DR3_READ)
562 | (1 << INTERCEPT_DR4_READ)
563 | (1 << INTERCEPT_DR5_READ)
564 | (1 << INTERCEPT_DR6_READ)
565 | (1 << INTERCEPT_DR7_READ)
566 | (1 << INTERCEPT_DR0_WRITE)
567 | (1 << INTERCEPT_DR1_WRITE)
568 | (1 << INTERCEPT_DR2_WRITE)
569 | (1 << INTERCEPT_DR3_WRITE)
570 | (1 << INTERCEPT_DR4_WRITE)
571 | (1 << INTERCEPT_DR5_WRITE)
572 | (1 << INTERCEPT_DR6_WRITE)
573 | (1 << INTERCEPT_DR7_WRITE);
575 recalc_intercepts(svm);
578 static inline void clr_dr_intercepts(struct vcpu_svm *svm)
580 struct vmcb *vmcb = get_host_vmcb(svm);
582 vmcb->control.intercept_dr = 0;
584 recalc_intercepts(svm);
587 static inline void set_exception_intercept(struct vcpu_svm *svm, int bit)
589 struct vmcb *vmcb = get_host_vmcb(svm);
591 vmcb->control.intercept_exceptions |= (1U << bit);
593 recalc_intercepts(svm);
596 static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit)
598 struct vmcb *vmcb = get_host_vmcb(svm);
600 vmcb->control.intercept_exceptions &= ~(1U << bit);
602 recalc_intercepts(svm);
605 static inline void set_intercept(struct vcpu_svm *svm, int bit)
607 struct vmcb *vmcb = get_host_vmcb(svm);
609 vmcb->control.intercept |= (1ULL << bit);
611 recalc_intercepts(svm);
614 static inline void clr_intercept(struct vcpu_svm *svm, int bit)
616 struct vmcb *vmcb = get_host_vmcb(svm);
618 vmcb->control.intercept &= ~(1ULL << bit);
620 recalc_intercepts(svm);
623 static inline bool vgif_enabled(struct vcpu_svm *svm)
625 return !!(svm->vmcb->control.int_ctl & V_GIF_ENABLE_MASK);
628 static inline void enable_gif(struct vcpu_svm *svm)
630 if (vgif_enabled(svm))
631 svm->vmcb->control.int_ctl |= V_GIF_MASK;
633 svm->vcpu.arch.hflags |= HF_GIF_MASK;
636 static inline void disable_gif(struct vcpu_svm *svm)
638 if (vgif_enabled(svm))
639 svm->vmcb->control.int_ctl &= ~V_GIF_MASK;
641 svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
644 static inline bool gif_set(struct vcpu_svm *svm)
646 if (vgif_enabled(svm))
647 return !!(svm->vmcb->control.int_ctl & V_GIF_MASK);
649 return !!(svm->vcpu.arch.hflags & HF_GIF_MASK);
652 static unsigned long iopm_base;
654 struct kvm_ldttss_desc {
657 unsigned base1:8, type:5, dpl:2, p:1;
658 unsigned limit1:4, zero0:3, g:1, base2:8;
661 } __attribute__((packed));
663 struct svm_cpu_data {
670 struct kvm_ldttss_desc *tss_desc;
672 struct page *save_area;
673 struct vmcb *current_vmcb;
675 /* index = sev_asid, value = vmcb pointer */
676 struct vmcb **sev_vmcbs;
679 static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
681 static const u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
683 #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
684 #define MSRS_RANGE_SIZE 2048
685 #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
687 static u32 svm_msrpm_offset(u32 msr)
692 for (i = 0; i < NUM_MSR_MAPS; i++) {
693 if (msr < msrpm_ranges[i] ||
694 msr >= msrpm_ranges[i] + MSRS_IN_RANGE)
697 offset = (msr - msrpm_ranges[i]) / 4; /* 4 msrs per u8 */
698 offset += (i * MSRS_RANGE_SIZE); /* add range offset */
700 /* Now we have the u8 offset - but need the u32 offset */
704 /* MSR not in any range */
708 #define MAX_INST_SIZE 15
710 static inline void clgi(void)
712 asm volatile (__ex("clgi"));
715 static inline void stgi(void)
717 asm volatile (__ex("stgi"));
720 static inline void invlpga(unsigned long addr, u32 asid)
722 asm volatile (__ex("invlpga %1, %0") : : "c"(asid), "a"(addr));
725 static int get_npt_level(struct kvm_vcpu *vcpu)
728 return PT64_ROOT_4LEVEL;
730 return PT32E_ROOT_LEVEL;
734 static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
736 vcpu->arch.efer = efer;
737 if (!npt_enabled && !(efer & EFER_LMA))
740 to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
741 mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
744 static int is_external_interrupt(u32 info)
746 info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
747 return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
750 static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu)
752 struct vcpu_svm *svm = to_svm(vcpu);
755 if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
756 ret = KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS;
760 static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
762 struct vcpu_svm *svm = to_svm(vcpu);
765 svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
767 svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK;
771 static int skip_emulated_instruction(struct kvm_vcpu *vcpu)
773 struct vcpu_svm *svm = to_svm(vcpu);
775 if (nrips && svm->vmcb->control.next_rip != 0) {
776 WARN_ON_ONCE(!static_cpu_has(X86_FEATURE_NRIPS));
777 svm->next_rip = svm->vmcb->control.next_rip;
781 return kvm_emulate_instruction(vcpu, EMULTYPE_SKIP);
783 if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
784 printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
785 __func__, kvm_rip_read(vcpu), svm->next_rip);
787 kvm_rip_write(vcpu, svm->next_rip);
788 svm_set_interrupt_shadow(vcpu, 0);
793 static void svm_queue_exception(struct kvm_vcpu *vcpu)
795 struct vcpu_svm *svm = to_svm(vcpu);
796 unsigned nr = vcpu->arch.exception.nr;
797 bool has_error_code = vcpu->arch.exception.has_error_code;
798 bool reinject = vcpu->arch.exception.injected;
799 u32 error_code = vcpu->arch.exception.error_code;
802 * If we are within a nested VM we'd better #VMEXIT and let the guest
803 * handle the exception
806 nested_svm_check_exception(svm, nr, has_error_code, error_code))
809 kvm_deliver_exception_payload(&svm->vcpu);
811 if (nr == BP_VECTOR && !nrips) {
812 unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu);
815 * For guest debugging where we have to reinject #BP if some
816 * INT3 is guest-owned:
817 * Emulate nRIP by moving RIP forward. Will fail if injection
818 * raises a fault that is not intercepted. Still better than
819 * failing in all cases.
821 (void)skip_emulated_instruction(&svm->vcpu);
822 rip = kvm_rip_read(&svm->vcpu);
823 svm->int3_rip = rip + svm->vmcb->save.cs.base;
824 svm->int3_injected = rip - old_rip;
827 svm->vmcb->control.event_inj = nr
829 | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
830 | SVM_EVTINJ_TYPE_EXEPT;
831 svm->vmcb->control.event_inj_err = error_code;
834 static void svm_init_erratum_383(void)
840 if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH))
843 /* Use _safe variants to not break nested virtualization */
844 val = native_read_msr_safe(MSR_AMD64_DC_CFG, &err);
850 low = lower_32_bits(val);
851 high = upper_32_bits(val);
853 native_write_msr_safe(MSR_AMD64_DC_CFG, low, high);
855 erratum_383_found = true;
858 static void svm_init_osvw(struct kvm_vcpu *vcpu)
861 * Guests should see errata 400 and 415 as fixed (assuming that
862 * HLT and IO instructions are intercepted).
864 vcpu->arch.osvw.length = (osvw_len >= 3) ? (osvw_len) : 3;
865 vcpu->arch.osvw.status = osvw_status & ~(6ULL);
868 * By increasing VCPU's osvw.length to 3 we are telling the guest that
869 * all osvw.status bits inside that length, including bit 0 (which is
870 * reserved for erratum 298), are valid. However, if host processor's
871 * osvw_len is 0 then osvw_status[0] carries no information. We need to
872 * be conservative here and therefore we tell the guest that erratum 298
873 * is present (because we really don't know).
875 if (osvw_len == 0 && boot_cpu_data.x86 == 0x10)
876 vcpu->arch.osvw.status |= 1;
879 static int has_svm(void)
883 if (!cpu_has_svm(&msg)) {
884 printk(KERN_INFO "has_svm: %s\n", msg);
891 static void svm_hardware_disable(void)
893 /* Make sure we clean up behind us */
894 if (static_cpu_has(X86_FEATURE_TSCRATEMSR))
895 wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
899 amd_pmu_disable_virt();
902 static int svm_hardware_enable(void)
905 struct svm_cpu_data *sd;
907 struct desc_struct *gdt;
908 int me = raw_smp_processor_id();
910 rdmsrl(MSR_EFER, efer);
911 if (efer & EFER_SVME)
915 pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me);
918 sd = per_cpu(svm_data, me);
920 pr_err("%s: svm_data is NULL on %d\n", __func__, me);
924 sd->asid_generation = 1;
925 sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
926 sd->next_asid = sd->max_asid + 1;
927 sd->min_asid = max_sev_asid + 1;
929 gdt = get_current_gdt_rw();
930 sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
932 wrmsrl(MSR_EFER, efer | EFER_SVME);
934 wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
936 if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
937 wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
938 __this_cpu_write(current_tsc_ratio, TSC_RATIO_DEFAULT);
945 * Note that it is possible to have a system with mixed processor
946 * revisions and therefore different OSVW bits. If bits are not the same
947 * on different processors then choose the worst case (i.e. if erratum
948 * is present on one processor and not on another then assume that the
949 * erratum is present everywhere).
951 if (cpu_has(&boot_cpu_data, X86_FEATURE_OSVW)) {
952 uint64_t len, status = 0;
955 len = native_read_msr_safe(MSR_AMD64_OSVW_ID_LENGTH, &err);
957 status = native_read_msr_safe(MSR_AMD64_OSVW_STATUS,
961 osvw_status = osvw_len = 0;
965 osvw_status |= status;
966 osvw_status &= (1ULL << osvw_len) - 1;
969 osvw_status = osvw_len = 0;
971 svm_init_erratum_383();
973 amd_pmu_enable_virt();
978 static void svm_cpu_uninit(int cpu)
980 struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
985 per_cpu(svm_data, raw_smp_processor_id()) = NULL;
986 kfree(sd->sev_vmcbs);
987 __free_page(sd->save_area);
991 static int svm_cpu_init(int cpu)
993 struct svm_cpu_data *sd;
996 sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
1001 sd->save_area = alloc_page(GFP_KERNEL);
1005 if (svm_sev_enabled()) {
1007 sd->sev_vmcbs = kmalloc_array(max_sev_asid + 1,
1014 per_cpu(svm_data, cpu) = sd;
1024 static bool valid_msr_intercept(u32 index)
1028 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++)
1029 if (direct_access_msrs[i].index == index)
1035 static bool msr_write_intercepted(struct kvm_vcpu *vcpu, unsigned msr)
1042 msrpm = is_guest_mode(vcpu) ? to_svm(vcpu)->nested.msrpm:
1043 to_svm(vcpu)->msrpm;
1045 offset = svm_msrpm_offset(msr);
1046 bit_write = 2 * (msr & 0x0f) + 1;
1047 tmp = msrpm[offset];
1049 BUG_ON(offset == MSR_INVALID);
1051 return !!test_bit(bit_write, &tmp);
1054 static void set_msr_interception(u32 *msrpm, unsigned msr,
1055 int read, int write)
1057 u8 bit_read, bit_write;
1062 * If this warning triggers extend the direct_access_msrs list at the
1063 * beginning of the file
1065 WARN_ON(!valid_msr_intercept(msr));
1067 offset = svm_msrpm_offset(msr);
1068 bit_read = 2 * (msr & 0x0f);
1069 bit_write = 2 * (msr & 0x0f) + 1;
1070 tmp = msrpm[offset];
1072 BUG_ON(offset == MSR_INVALID);
1074 read ? clear_bit(bit_read, &tmp) : set_bit(bit_read, &tmp);
1075 write ? clear_bit(bit_write, &tmp) : set_bit(bit_write, &tmp);
1077 msrpm[offset] = tmp;
1080 static void svm_vcpu_init_msrpm(u32 *msrpm)
1084 memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
1086 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
1087 if (!direct_access_msrs[i].always)
1090 set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1);
1094 static void add_msr_offset(u32 offset)
1098 for (i = 0; i < MSRPM_OFFSETS; ++i) {
1100 /* Offset already in list? */
1101 if (msrpm_offsets[i] == offset)
1104 /* Slot used by another offset? */
1105 if (msrpm_offsets[i] != MSR_INVALID)
1108 /* Add offset to list */
1109 msrpm_offsets[i] = offset;
1115 * If this BUG triggers the msrpm_offsets table has an overflow. Just
1116 * increase MSRPM_OFFSETS in this case.
1121 static void init_msrpm_offsets(void)
1125 memset(msrpm_offsets, 0xff, sizeof(msrpm_offsets));
1127 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
1130 offset = svm_msrpm_offset(direct_access_msrs[i].index);
1131 BUG_ON(offset == MSR_INVALID);
1133 add_msr_offset(offset);
1137 static void svm_enable_lbrv(struct vcpu_svm *svm)
1139 u32 *msrpm = svm->msrpm;
1141 svm->vmcb->control.virt_ext |= LBR_CTL_ENABLE_MASK;
1142 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1);
1143 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1);
1144 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
1145 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1);
1148 static void svm_disable_lbrv(struct vcpu_svm *svm)
1150 u32 *msrpm = svm->msrpm;
1152 svm->vmcb->control.virt_ext &= ~LBR_CTL_ENABLE_MASK;
1153 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0);
1154 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0);
1155 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0);
1156 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0);
1159 static void disable_nmi_singlestep(struct vcpu_svm *svm)
1161 svm->nmi_singlestep = false;
1163 if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP)) {
1164 /* Clear our flags if they were not set by the guest */
1165 if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_TF))
1166 svm->vmcb->save.rflags &= ~X86_EFLAGS_TF;
1167 if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_RF))
1168 svm->vmcb->save.rflags &= ~X86_EFLAGS_RF;
1173 * This hash table is used to map VM_ID to a struct kvm_svm,
1174 * when handling AMD IOMMU GALOG notification to schedule in
1175 * a particular vCPU.
1177 #define SVM_VM_DATA_HASH_BITS 8
1178 static DEFINE_HASHTABLE(svm_vm_data_hash, SVM_VM_DATA_HASH_BITS);
1179 static u32 next_vm_id = 0;
1180 static bool next_vm_id_wrapped = 0;
1181 static DEFINE_SPINLOCK(svm_vm_data_hash_lock);
1184 * This function is called from IOMMU driver to notify
1185 * SVM to schedule in a particular vCPU of a particular VM.
1187 static int avic_ga_log_notifier(u32 ga_tag)
1189 unsigned long flags;
1190 struct kvm_svm *kvm_svm;
1191 struct kvm_vcpu *vcpu = NULL;
1192 u32 vm_id = AVIC_GATAG_TO_VMID(ga_tag);
1193 u32 vcpu_id = AVIC_GATAG_TO_VCPUID(ga_tag);
1195 pr_debug("SVM: %s: vm_id=%#x, vcpu_id=%#x\n", __func__, vm_id, vcpu_id);
1197 spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1198 hash_for_each_possible(svm_vm_data_hash, kvm_svm, hnode, vm_id) {
1199 if (kvm_svm->avic_vm_id != vm_id)
1201 vcpu = kvm_get_vcpu_by_id(&kvm_svm->kvm, vcpu_id);
1204 spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);
1207 * At this point, the IOMMU should have already set the pending
1208 * bit in the vAPIC backing page. So, we just need to schedule
1212 kvm_vcpu_wake_up(vcpu);
1217 static __init int sev_hardware_setup(void)
1219 struct sev_user_data_status *status;
1222 /* Maximum number of encrypted guests supported simultaneously */
1223 max_sev_asid = cpuid_ecx(0x8000001F);
1228 /* Minimum ASID value that should be used for SEV guest */
1229 min_sev_asid = cpuid_edx(0x8000001F);
1231 /* Initialize SEV ASID bitmap */
1232 sev_asid_bitmap = bitmap_zalloc(max_sev_asid, GFP_KERNEL);
1233 if (!sev_asid_bitmap)
1236 status = kmalloc(sizeof(*status), GFP_KERNEL);
1241 * Check SEV platform status.
1243 * PLATFORM_STATUS can be called in any state, if we failed to query
1244 * the PLATFORM status then either PSP firmware does not support SEV
1245 * feature or SEV firmware is dead.
1247 rc = sev_platform_status(status, NULL);
1251 pr_info("SEV supported\n");
1258 static void grow_ple_window(struct kvm_vcpu *vcpu)
1260 struct vcpu_svm *svm = to_svm(vcpu);
1261 struct vmcb_control_area *control = &svm->vmcb->control;
1262 int old = control->pause_filter_count;
1264 control->pause_filter_count = __grow_ple_window(old,
1266 pause_filter_count_grow,
1267 pause_filter_count_max);
1269 if (control->pause_filter_count != old) {
1270 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
1271 trace_kvm_ple_window_update(vcpu->vcpu_id,
1272 control->pause_filter_count, old);
1276 static void shrink_ple_window(struct kvm_vcpu *vcpu)
1278 struct vcpu_svm *svm = to_svm(vcpu);
1279 struct vmcb_control_area *control = &svm->vmcb->control;
1280 int old = control->pause_filter_count;
1282 control->pause_filter_count =
1283 __shrink_ple_window(old,
1285 pause_filter_count_shrink,
1286 pause_filter_count);
1287 if (control->pause_filter_count != old) {
1288 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
1289 trace_kvm_ple_window_update(vcpu->vcpu_id,
1290 control->pause_filter_count, old);
1294 static __init int svm_hardware_setup(void)
1297 struct page *iopm_pages;
1301 iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
1306 iopm_va = page_address(iopm_pages);
1307 memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
1308 iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
1310 init_msrpm_offsets();
1312 if (boot_cpu_has(X86_FEATURE_NX))
1313 kvm_enable_efer_bits(EFER_NX);
1315 if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
1316 kvm_enable_efer_bits(EFER_FFXSR);
1318 if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
1319 kvm_has_tsc_control = true;
1320 kvm_max_tsc_scaling_ratio = TSC_RATIO_MAX;
1321 kvm_tsc_scaling_ratio_frac_bits = 32;
1324 /* Check for pause filtering support */
1325 if (!boot_cpu_has(X86_FEATURE_PAUSEFILTER)) {
1326 pause_filter_count = 0;
1327 pause_filter_thresh = 0;
1328 } else if (!boot_cpu_has(X86_FEATURE_PFTHRESHOLD)) {
1329 pause_filter_thresh = 0;
1333 printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
1334 kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE);
1338 if (boot_cpu_has(X86_FEATURE_SEV) &&
1339 IS_ENABLED(CONFIG_KVM_AMD_SEV)) {
1340 r = sev_hardware_setup();
1348 for_each_possible_cpu(cpu) {
1349 r = svm_cpu_init(cpu);
1354 if (!boot_cpu_has(X86_FEATURE_NPT))
1355 npt_enabled = false;
1357 if (npt_enabled && !npt) {
1358 printk(KERN_INFO "kvm: Nested Paging disabled\n");
1359 npt_enabled = false;
1363 printk(KERN_INFO "kvm: Nested Paging enabled\n");
1369 if (!boot_cpu_has(X86_FEATURE_NRIPS))
1375 !boot_cpu_has(X86_FEATURE_AVIC) ||
1376 !IS_ENABLED(CONFIG_X86_LOCAL_APIC)) {
1379 pr_info("AVIC enabled\n");
1381 amd_iommu_register_ga_log_notifier(&avic_ga_log_notifier);
1387 !boot_cpu_has(X86_FEATURE_V_VMSAVE_VMLOAD) ||
1388 !IS_ENABLED(CONFIG_X86_64)) {
1391 pr_info("Virtual VMLOAD VMSAVE supported\n");
1396 if (!boot_cpu_has(X86_FEATURE_VGIF))
1399 pr_info("Virtual GIF supported\n");
1405 __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
1410 static __exit void svm_hardware_unsetup(void)
1414 if (svm_sev_enabled())
1415 bitmap_free(sev_asid_bitmap);
1417 for_each_possible_cpu(cpu)
1418 svm_cpu_uninit(cpu);
1420 __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
1424 static void init_seg(struct vmcb_seg *seg)
1427 seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
1428 SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
1429 seg->limit = 0xffff;
1433 static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
1436 seg->attrib = SVM_SELECTOR_P_MASK | type;
1437 seg->limit = 0xffff;
1441 static u64 svm_read_l1_tsc_offset(struct kvm_vcpu *vcpu)
1443 struct vcpu_svm *svm = to_svm(vcpu);
1445 if (is_guest_mode(vcpu))
1446 return svm->nested.hsave->control.tsc_offset;
1448 return vcpu->arch.tsc_offset;
1451 static u64 svm_write_l1_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
1453 struct vcpu_svm *svm = to_svm(vcpu);
1454 u64 g_tsc_offset = 0;
1456 if (is_guest_mode(vcpu)) {
1457 /* Write L1's TSC offset. */
1458 g_tsc_offset = svm->vmcb->control.tsc_offset -
1459 svm->nested.hsave->control.tsc_offset;
1460 svm->nested.hsave->control.tsc_offset = offset;
1463 trace_kvm_write_tsc_offset(vcpu->vcpu_id,
1464 svm->vmcb->control.tsc_offset - g_tsc_offset,
1467 svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
1469 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
1470 return svm->vmcb->control.tsc_offset;
1473 static void avic_init_vmcb(struct vcpu_svm *svm)
1475 struct vmcb *vmcb = svm->vmcb;
1476 struct kvm_svm *kvm_svm = to_kvm_svm(svm->vcpu.kvm);
1477 phys_addr_t bpa = __sme_set(page_to_phys(svm->avic_backing_page));
1478 phys_addr_t lpa = __sme_set(page_to_phys(kvm_svm->avic_logical_id_table_page));
1479 phys_addr_t ppa = __sme_set(page_to_phys(kvm_svm->avic_physical_id_table_page));
1481 vmcb->control.avic_backing_page = bpa & AVIC_HPA_MASK;
1482 vmcb->control.avic_logical_id = lpa & AVIC_HPA_MASK;
1483 vmcb->control.avic_physical_id = ppa & AVIC_HPA_MASK;
1484 vmcb->control.avic_physical_id |= AVIC_MAX_PHYSICAL_ID_COUNT;
1485 vmcb->control.int_ctl |= AVIC_ENABLE_MASK;
1488 static void init_vmcb(struct vcpu_svm *svm)
1490 struct vmcb_control_area *control = &svm->vmcb->control;
1491 struct vmcb_save_area *save = &svm->vmcb->save;
1493 svm->vcpu.arch.hflags = 0;
1495 set_cr_intercept(svm, INTERCEPT_CR0_READ);
1496 set_cr_intercept(svm, INTERCEPT_CR3_READ);
1497 set_cr_intercept(svm, INTERCEPT_CR4_READ);
1498 set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
1499 set_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1500 set_cr_intercept(svm, INTERCEPT_CR4_WRITE);
1501 if (!kvm_vcpu_apicv_active(&svm->vcpu))
1502 set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
1504 set_dr_intercepts(svm);
1506 set_exception_intercept(svm, PF_VECTOR);
1507 set_exception_intercept(svm, UD_VECTOR);
1508 set_exception_intercept(svm, MC_VECTOR);
1509 set_exception_intercept(svm, AC_VECTOR);
1510 set_exception_intercept(svm, DB_VECTOR);
1512 * Guest access to VMware backdoor ports could legitimately
1513 * trigger #GP because of TSS I/O permission bitmap.
1514 * We intercept those #GP and allow access to them anyway
1517 if (enable_vmware_backdoor)
1518 set_exception_intercept(svm, GP_VECTOR);
1520 set_intercept(svm, INTERCEPT_INTR);
1521 set_intercept(svm, INTERCEPT_NMI);
1522 set_intercept(svm, INTERCEPT_SMI);
1523 set_intercept(svm, INTERCEPT_SELECTIVE_CR0);
1524 set_intercept(svm, INTERCEPT_RDPMC);
1525 set_intercept(svm, INTERCEPT_CPUID);
1526 set_intercept(svm, INTERCEPT_INVD);
1527 set_intercept(svm, INTERCEPT_INVLPG);
1528 set_intercept(svm, INTERCEPT_INVLPGA);
1529 set_intercept(svm, INTERCEPT_IOIO_PROT);
1530 set_intercept(svm, INTERCEPT_MSR_PROT);
1531 set_intercept(svm, INTERCEPT_TASK_SWITCH);
1532 set_intercept(svm, INTERCEPT_SHUTDOWN);
1533 set_intercept(svm, INTERCEPT_VMRUN);
1534 set_intercept(svm, INTERCEPT_VMMCALL);
1535 set_intercept(svm, INTERCEPT_VMLOAD);
1536 set_intercept(svm, INTERCEPT_VMSAVE);
1537 set_intercept(svm, INTERCEPT_STGI);
1538 set_intercept(svm, INTERCEPT_CLGI);
1539 set_intercept(svm, INTERCEPT_SKINIT);
1540 set_intercept(svm, INTERCEPT_WBINVD);
1541 set_intercept(svm, INTERCEPT_XSETBV);
1542 set_intercept(svm, INTERCEPT_RSM);
1544 if (!kvm_mwait_in_guest(svm->vcpu.kvm)) {
1545 set_intercept(svm, INTERCEPT_MONITOR);
1546 set_intercept(svm, INTERCEPT_MWAIT);
1549 if (!kvm_hlt_in_guest(svm->vcpu.kvm))
1550 set_intercept(svm, INTERCEPT_HLT);
1552 control->iopm_base_pa = __sme_set(iopm_base);
1553 control->msrpm_base_pa = __sme_set(__pa(svm->msrpm));
1554 control->int_ctl = V_INTR_MASKING_MASK;
1556 init_seg(&save->es);
1557 init_seg(&save->ss);
1558 init_seg(&save->ds);
1559 init_seg(&save->fs);
1560 init_seg(&save->gs);
1562 save->cs.selector = 0xf000;
1563 save->cs.base = 0xffff0000;
1564 /* Executable/Readable Code Segment */
1565 save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
1566 SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
1567 save->cs.limit = 0xffff;
1569 save->gdtr.limit = 0xffff;
1570 save->idtr.limit = 0xffff;
1572 init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
1573 init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
1575 svm_set_efer(&svm->vcpu, 0);
1576 save->dr6 = 0xffff0ff0;
1577 kvm_set_rflags(&svm->vcpu, 2);
1578 save->rip = 0x0000fff0;
1579 svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
1582 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
1583 * It also updates the guest-visible cr0 value.
1585 svm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET);
1586 kvm_mmu_reset_context(&svm->vcpu);
1588 save->cr4 = X86_CR4_PAE;
1592 /* Setup VMCB for Nested Paging */
1593 control->nested_ctl |= SVM_NESTED_CTL_NP_ENABLE;
1594 clr_intercept(svm, INTERCEPT_INVLPG);
1595 clr_exception_intercept(svm, PF_VECTOR);
1596 clr_cr_intercept(svm, INTERCEPT_CR3_READ);
1597 clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1598 save->g_pat = svm->vcpu.arch.pat;
1602 svm->asid_generation = 0;
1604 svm->nested.vmcb = 0;
1605 svm->vcpu.arch.hflags = 0;
1607 if (pause_filter_count) {
1608 control->pause_filter_count = pause_filter_count;
1609 if (pause_filter_thresh)
1610 control->pause_filter_thresh = pause_filter_thresh;
1611 set_intercept(svm, INTERCEPT_PAUSE);
1613 clr_intercept(svm, INTERCEPT_PAUSE);
1616 if (kvm_vcpu_apicv_active(&svm->vcpu))
1617 avic_init_vmcb(svm);
1620 * If hardware supports Virtual VMLOAD VMSAVE then enable it
1621 * in VMCB and clear intercepts to avoid #VMEXIT.
1624 clr_intercept(svm, INTERCEPT_VMLOAD);
1625 clr_intercept(svm, INTERCEPT_VMSAVE);
1626 svm->vmcb->control.virt_ext |= VIRTUAL_VMLOAD_VMSAVE_ENABLE_MASK;
1630 clr_intercept(svm, INTERCEPT_STGI);
1631 clr_intercept(svm, INTERCEPT_CLGI);
1632 svm->vmcb->control.int_ctl |= V_GIF_ENABLE_MASK;
1635 if (sev_guest(svm->vcpu.kvm)) {
1636 svm->vmcb->control.nested_ctl |= SVM_NESTED_CTL_SEV_ENABLE;
1637 clr_exception_intercept(svm, UD_VECTOR);
1640 mark_all_dirty(svm->vmcb);
1646 static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu,
1649 u64 *avic_physical_id_table;
1650 struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
1652 if (index >= AVIC_MAX_PHYSICAL_ID_COUNT)
1655 avic_physical_id_table = page_address(kvm_svm->avic_physical_id_table_page);
1657 return &avic_physical_id_table[index];
1662 * AVIC hardware walks the nested page table to check permissions,
1663 * but does not use the SPA address specified in the leaf page
1664 * table entry since it uses address in the AVIC_BACKING_PAGE pointer
1665 * field of the VMCB. Therefore, we set up the
1666 * APIC_ACCESS_PAGE_PRIVATE_MEMSLOT (4KB) here.
1668 static int avic_init_access_page(struct kvm_vcpu *vcpu)
1670 struct kvm *kvm = vcpu->kvm;
1673 mutex_lock(&kvm->slots_lock);
1674 if (kvm->arch.apic_access_page_done)
1677 ret = __x86_set_memory_region(kvm,
1678 APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
1679 APIC_DEFAULT_PHYS_BASE,
1684 kvm->arch.apic_access_page_done = true;
1686 mutex_unlock(&kvm->slots_lock);
1690 static int avic_init_backing_page(struct kvm_vcpu *vcpu)
1693 u64 *entry, new_entry;
1694 int id = vcpu->vcpu_id;
1695 struct vcpu_svm *svm = to_svm(vcpu);
1697 ret = avic_init_access_page(vcpu);
1701 if (id >= AVIC_MAX_PHYSICAL_ID_COUNT)
1704 if (!svm->vcpu.arch.apic->regs)
1707 svm->avic_backing_page = virt_to_page(svm->vcpu.arch.apic->regs);
1709 /* Setting AVIC backing page address in the phy APIC ID table */
1710 entry = avic_get_physical_id_entry(vcpu, id);
1714 new_entry = __sme_set((page_to_phys(svm->avic_backing_page) &
1715 AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK) |
1716 AVIC_PHYSICAL_ID_ENTRY_VALID_MASK);
1717 WRITE_ONCE(*entry, new_entry);
1719 svm->avic_physical_id_cache = entry;
1724 static void __sev_asid_free(int asid)
1726 struct svm_cpu_data *sd;
1730 clear_bit(pos, sev_asid_bitmap);
1732 for_each_possible_cpu(cpu) {
1733 sd = per_cpu(svm_data, cpu);
1734 sd->sev_vmcbs[pos] = NULL;
1738 static void sev_asid_free(struct kvm *kvm)
1740 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1742 __sev_asid_free(sev->asid);
1745 static void sev_unbind_asid(struct kvm *kvm, unsigned int handle)
1747 struct sev_data_decommission *decommission;
1748 struct sev_data_deactivate *data;
1753 data = kzalloc(sizeof(*data), GFP_KERNEL);
1757 /* deactivate handle */
1758 data->handle = handle;
1759 sev_guest_deactivate(data, NULL);
1761 wbinvd_on_all_cpus();
1762 sev_guest_df_flush(NULL);
1765 decommission = kzalloc(sizeof(*decommission), GFP_KERNEL);
1769 /* decommission handle */
1770 decommission->handle = handle;
1771 sev_guest_decommission(decommission, NULL);
1773 kfree(decommission);
1776 static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
1777 unsigned long ulen, unsigned long *n,
1780 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1781 unsigned long npages, npinned, size;
1782 unsigned long locked, lock_limit;
1783 struct page **pages;
1784 unsigned long first, last;
1786 if (ulen == 0 || uaddr + ulen < uaddr)
1789 /* Calculate number of pages. */
1790 first = (uaddr & PAGE_MASK) >> PAGE_SHIFT;
1791 last = ((uaddr + ulen - 1) & PAGE_MASK) >> PAGE_SHIFT;
1792 npages = (last - first + 1);
1794 locked = sev->pages_locked + npages;
1795 lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
1796 if (locked > lock_limit && !capable(CAP_IPC_LOCK)) {
1797 pr_err("SEV: %lu locked pages exceed the lock limit of %lu.\n", locked, lock_limit);
1801 /* Avoid using vmalloc for smaller buffers. */
1802 size = npages * sizeof(struct page *);
1803 if (size > PAGE_SIZE)
1804 pages = __vmalloc(size, GFP_KERNEL_ACCOUNT | __GFP_ZERO,
1807 pages = kmalloc(size, GFP_KERNEL_ACCOUNT);
1812 /* Pin the user virtual address. */
1813 npinned = get_user_pages_fast(uaddr, npages, FOLL_WRITE, pages);
1814 if (npinned != npages) {
1815 pr_err("SEV: Failure locking %lu pages.\n", npages);
1820 sev->pages_locked = locked;
1826 release_pages(pages, npinned);
1832 static void sev_unpin_memory(struct kvm *kvm, struct page **pages,
1833 unsigned long npages)
1835 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1837 release_pages(pages, npages);
1839 sev->pages_locked -= npages;
1842 static void sev_clflush_pages(struct page *pages[], unsigned long npages)
1844 uint8_t *page_virtual;
1847 if (npages == 0 || pages == NULL)
1850 for (i = 0; i < npages; i++) {
1851 page_virtual = kmap_atomic(pages[i]);
1852 clflush_cache_range(page_virtual, PAGE_SIZE);
1853 kunmap_atomic(page_virtual);
1857 static void __unregister_enc_region_locked(struct kvm *kvm,
1858 struct enc_region *region)
1861 * The guest may change the memory encryption attribute from C=0 -> C=1
1862 * or vice versa for this memory range. Lets make sure caches are
1863 * flushed to ensure that guest data gets written into memory with
1866 sev_clflush_pages(region->pages, region->npages);
1868 sev_unpin_memory(kvm, region->pages, region->npages);
1869 list_del(®ion->list);
1873 static struct kvm *svm_vm_alloc(void)
1875 struct kvm_svm *kvm_svm = __vmalloc(sizeof(struct kvm_svm),
1876 GFP_KERNEL_ACCOUNT | __GFP_ZERO,
1878 return &kvm_svm->kvm;
1881 static void svm_vm_free(struct kvm *kvm)
1883 vfree(to_kvm_svm(kvm));
1886 static void sev_vm_destroy(struct kvm *kvm)
1888 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1889 struct list_head *head = &sev->regions_list;
1890 struct list_head *pos, *q;
1892 if (!sev_guest(kvm))
1895 mutex_lock(&kvm->lock);
1898 * if userspace was terminated before unregistering the memory regions
1899 * then lets unpin all the registered memory.
1901 if (!list_empty(head)) {
1902 list_for_each_safe(pos, q, head) {
1903 __unregister_enc_region_locked(kvm,
1904 list_entry(pos, struct enc_region, list));
1908 mutex_unlock(&kvm->lock);
1910 sev_unbind_asid(kvm, sev->handle);
1914 static void avic_vm_destroy(struct kvm *kvm)
1916 unsigned long flags;
1917 struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
1922 if (kvm_svm->avic_logical_id_table_page)
1923 __free_page(kvm_svm->avic_logical_id_table_page);
1924 if (kvm_svm->avic_physical_id_table_page)
1925 __free_page(kvm_svm->avic_physical_id_table_page);
1927 spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1928 hash_del(&kvm_svm->hnode);
1929 spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);
1932 static void svm_vm_destroy(struct kvm *kvm)
1934 avic_vm_destroy(kvm);
1935 sev_vm_destroy(kvm);
1938 static int avic_vm_init(struct kvm *kvm)
1940 unsigned long flags;
1942 struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
1944 struct page *p_page;
1945 struct page *l_page;
1951 /* Allocating physical APIC ID table (4KB) */
1952 p_page = alloc_page(GFP_KERNEL_ACCOUNT);
1956 kvm_svm->avic_physical_id_table_page = p_page;
1957 clear_page(page_address(p_page));
1959 /* Allocating logical APIC ID table (4KB) */
1960 l_page = alloc_page(GFP_KERNEL_ACCOUNT);
1964 kvm_svm->avic_logical_id_table_page = l_page;
1965 clear_page(page_address(l_page));
1967 spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1969 vm_id = next_vm_id = (next_vm_id + 1) & AVIC_VM_ID_MASK;
1970 if (vm_id == 0) { /* id is 1-based, zero is not okay */
1971 next_vm_id_wrapped = 1;
1974 /* Is it still in use? Only possible if wrapped at least once */
1975 if (next_vm_id_wrapped) {
1976 hash_for_each_possible(svm_vm_data_hash, k2, hnode, vm_id) {
1977 if (k2->avic_vm_id == vm_id)
1981 kvm_svm->avic_vm_id = vm_id;
1982 hash_add(svm_vm_data_hash, &kvm_svm->hnode, kvm_svm->avic_vm_id);
1983 spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);
1988 avic_vm_destroy(kvm);
1993 avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
1996 unsigned long flags;
1997 struct amd_svm_iommu_ir *ir;
1998 struct vcpu_svm *svm = to_svm(vcpu);
2000 if (!kvm_arch_has_assigned_device(vcpu->kvm))
2004 * Here, we go through the per-vcpu ir_list to update all existing
2005 * interrupt remapping table entry targeting this vcpu.
2007 spin_lock_irqsave(&svm->ir_list_lock, flags);
2009 if (list_empty(&svm->ir_list))
2012 list_for_each_entry(ir, &svm->ir_list, node) {
2013 ret = amd_iommu_update_ga(cpu, r, ir->data);
2018 spin_unlock_irqrestore(&svm->ir_list_lock, flags);
2022 static void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2025 /* ID = 0xff (broadcast), ID > 0xff (reserved) */
2026 int h_physical_id = kvm_cpu_get_apicid(cpu);
2027 struct vcpu_svm *svm = to_svm(vcpu);
2029 if (!kvm_vcpu_apicv_active(vcpu))
2033 * Since the host physical APIC id is 8 bits,
2034 * we can support host APIC ID upto 255.
2036 if (WARN_ON(h_physical_id > AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK))
2039 entry = READ_ONCE(*(svm->avic_physical_id_cache));
2040 WARN_ON(entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK);
2042 entry &= ~AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK;
2043 entry |= (h_physical_id & AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK);
2045 entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
2046 if (svm->avic_is_running)
2047 entry |= AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
2049 WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
2050 avic_update_iommu_vcpu_affinity(vcpu, h_physical_id,
2051 svm->avic_is_running);
2054 static void avic_vcpu_put(struct kvm_vcpu *vcpu)
2057 struct vcpu_svm *svm = to_svm(vcpu);
2059 if (!kvm_vcpu_apicv_active(vcpu))
2062 entry = READ_ONCE(*(svm->avic_physical_id_cache));
2063 if (entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK)
2064 avic_update_iommu_vcpu_affinity(vcpu, -1, 0);
2066 entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
2067 WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
2071 * This function is called during VCPU halt/unhalt.
2073 static void avic_set_running(struct kvm_vcpu *vcpu, bool is_run)
2075 struct vcpu_svm *svm = to_svm(vcpu);
2077 svm->avic_is_running = is_run;
2079 avic_vcpu_load(vcpu, vcpu->cpu);
2081 avic_vcpu_put(vcpu);
2084 static void svm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
2086 struct vcpu_svm *svm = to_svm(vcpu);
2090 vcpu->arch.microcode_version = 0x01000065;
2092 svm->virt_spec_ctrl = 0;
2095 svm->vcpu.arch.apic_base = APIC_DEFAULT_PHYS_BASE |
2096 MSR_IA32_APICBASE_ENABLE;
2097 if (kvm_vcpu_is_reset_bsp(&svm->vcpu))
2098 svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP;
2102 kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy, true);
2103 kvm_rdx_write(vcpu, eax);
2105 if (kvm_vcpu_apicv_active(vcpu) && !init_event)
2106 avic_update_vapic_bar(svm, APIC_DEFAULT_PHYS_BASE);
2109 static int avic_init_vcpu(struct vcpu_svm *svm)
2113 if (!kvm_vcpu_apicv_active(&svm->vcpu))
2116 ret = avic_init_backing_page(&svm->vcpu);
2120 INIT_LIST_HEAD(&svm->ir_list);
2121 spin_lock_init(&svm->ir_list_lock);
2122 svm->dfr_reg = APIC_DFR_FLAT;
2127 static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
2129 struct vcpu_svm *svm;
2131 struct page *msrpm_pages;
2132 struct page *hsave_page;
2133 struct page *nested_msrpm_pages;
2136 BUILD_BUG_ON_MSG(offsetof(struct vcpu_svm, vcpu) != 0,
2137 "struct kvm_vcpu must be at offset 0 for arch usercopy region");
2139 svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL_ACCOUNT);
2145 svm->vcpu.arch.user_fpu = kmem_cache_zalloc(x86_fpu_cache,
2146 GFP_KERNEL_ACCOUNT);
2147 if (!svm->vcpu.arch.user_fpu) {
2148 printk(KERN_ERR "kvm: failed to allocate kvm userspace's fpu\n");
2150 goto free_partial_svm;
2153 svm->vcpu.arch.guest_fpu = kmem_cache_zalloc(x86_fpu_cache,
2154 GFP_KERNEL_ACCOUNT);
2155 if (!svm->vcpu.arch.guest_fpu) {
2156 printk(KERN_ERR "kvm: failed to allocate vcpu's fpu\n");
2161 err = kvm_vcpu_init(&svm->vcpu, kvm, id);
2166 page = alloc_page(GFP_KERNEL_ACCOUNT);
2170 msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER);
2174 nested_msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER);
2175 if (!nested_msrpm_pages)
2178 hsave_page = alloc_page(GFP_KERNEL_ACCOUNT);
2182 err = avic_init_vcpu(svm);
2186 /* We initialize this flag to true to make sure that the is_running
2187 * bit would be set the first time the vcpu is loaded.
2189 svm->avic_is_running = true;
2191 svm->nested.hsave = page_address(hsave_page);
2193 svm->msrpm = page_address(msrpm_pages);
2194 svm_vcpu_init_msrpm(svm->msrpm);
2196 svm->nested.msrpm = page_address(nested_msrpm_pages);
2197 svm_vcpu_init_msrpm(svm->nested.msrpm);
2199 svm->vmcb = page_address(page);
2200 clear_page(svm->vmcb);
2201 svm->vmcb_pa = __sme_set(page_to_pfn(page) << PAGE_SHIFT);
2202 svm->asid_generation = 0;
2205 svm_init_osvw(&svm->vcpu);
2210 __free_page(hsave_page);
2212 __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER);
2214 __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
2218 kvm_vcpu_uninit(&svm->vcpu);
2220 kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
2222 kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.user_fpu);
2224 kmem_cache_free(kvm_vcpu_cache, svm);
2226 return ERR_PTR(err);
2229 static void svm_clear_current_vmcb(struct vmcb *vmcb)
2233 for_each_online_cpu(i)
2234 cmpxchg(&per_cpu(svm_data, i)->current_vmcb, vmcb, NULL);
2237 static void svm_free_vcpu(struct kvm_vcpu *vcpu)
2239 struct vcpu_svm *svm = to_svm(vcpu);
2242 * The vmcb page can be recycled, causing a false negative in
2243 * svm_vcpu_load(). So, ensure that no logical CPU has this
2244 * vmcb page recorded as its current vmcb.
2246 svm_clear_current_vmcb(svm->vmcb);
2248 __free_page(pfn_to_page(__sme_clr(svm->vmcb_pa) >> PAGE_SHIFT));
2249 __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
2250 __free_page(virt_to_page(svm->nested.hsave));
2251 __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER);
2252 kvm_vcpu_uninit(vcpu);
2253 kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.user_fpu);
2254 kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
2255 kmem_cache_free(kvm_vcpu_cache, svm);
2258 static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2260 struct vcpu_svm *svm = to_svm(vcpu);
2261 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
2264 if (unlikely(cpu != vcpu->cpu)) {
2265 svm->asid_generation = 0;
2266 mark_all_dirty(svm->vmcb);
2269 #ifdef CONFIG_X86_64
2270 rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
2272 savesegment(fs, svm->host.fs);
2273 savesegment(gs, svm->host.gs);
2274 svm->host.ldt = kvm_read_ldt();
2276 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2277 rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
2279 if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
2280 u64 tsc_ratio = vcpu->arch.tsc_scaling_ratio;
2281 if (tsc_ratio != __this_cpu_read(current_tsc_ratio)) {
2282 __this_cpu_write(current_tsc_ratio, tsc_ratio);
2283 wrmsrl(MSR_AMD64_TSC_RATIO, tsc_ratio);
2286 /* This assumes that the kernel never uses MSR_TSC_AUX */
2287 if (static_cpu_has(X86_FEATURE_RDTSCP))
2288 wrmsrl(MSR_TSC_AUX, svm->tsc_aux);
2290 if (sd->current_vmcb != svm->vmcb) {
2291 sd->current_vmcb = svm->vmcb;
2292 indirect_branch_prediction_barrier();
2294 avic_vcpu_load(vcpu, cpu);
2297 static void svm_vcpu_put(struct kvm_vcpu *vcpu)
2299 struct vcpu_svm *svm = to_svm(vcpu);
2302 avic_vcpu_put(vcpu);
2304 ++vcpu->stat.host_state_reload;
2305 kvm_load_ldt(svm->host.ldt);
2306 #ifdef CONFIG_X86_64
2307 loadsegment(fs, svm->host.fs);
2308 wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gsbase);
2309 load_gs_index(svm->host.gs);
2311 #ifdef CONFIG_X86_32_LAZY_GS
2312 loadsegment(gs, svm->host.gs);
2315 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2316 wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
2319 static void svm_vcpu_blocking(struct kvm_vcpu *vcpu)
2321 avic_set_running(vcpu, false);
2324 static void svm_vcpu_unblocking(struct kvm_vcpu *vcpu)
2326 avic_set_running(vcpu, true);
2329 static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
2331 struct vcpu_svm *svm = to_svm(vcpu);
2332 unsigned long rflags = svm->vmcb->save.rflags;
2334 if (svm->nmi_singlestep) {
2335 /* Hide our flags if they were not set by the guest */
2336 if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_TF))
2337 rflags &= ~X86_EFLAGS_TF;
2338 if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_RF))
2339 rflags &= ~X86_EFLAGS_RF;
2344 static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
2346 if (to_svm(vcpu)->nmi_singlestep)
2347 rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
2350 * Any change of EFLAGS.VM is accompanied by a reload of SS
2351 * (caused by either a task switch or an inter-privilege IRET),
2352 * so we do not need to update the CPL here.
2354 to_svm(vcpu)->vmcb->save.rflags = rflags;
2357 static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
2360 case VCPU_EXREG_PDPTR:
2361 BUG_ON(!npt_enabled);
2362 load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
2369 static void svm_set_vintr(struct vcpu_svm *svm)
2371 set_intercept(svm, INTERCEPT_VINTR);
2374 static void svm_clear_vintr(struct vcpu_svm *svm)
2376 clr_intercept(svm, INTERCEPT_VINTR);
2379 static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
2381 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
2384 case VCPU_SREG_CS: return &save->cs;
2385 case VCPU_SREG_DS: return &save->ds;
2386 case VCPU_SREG_ES: return &save->es;
2387 case VCPU_SREG_FS: return &save->fs;
2388 case VCPU_SREG_GS: return &save->gs;
2389 case VCPU_SREG_SS: return &save->ss;
2390 case VCPU_SREG_TR: return &save->tr;
2391 case VCPU_SREG_LDTR: return &save->ldtr;
2397 static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
2399 struct vmcb_seg *s = svm_seg(vcpu, seg);
2404 static void svm_get_segment(struct kvm_vcpu *vcpu,
2405 struct kvm_segment *var, int seg)
2407 struct vmcb_seg *s = svm_seg(vcpu, seg);
2409 var->base = s->base;
2410 var->limit = s->limit;
2411 var->selector = s->selector;
2412 var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
2413 var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
2414 var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
2415 var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
2416 var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
2417 var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
2418 var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
2421 * AMD CPUs circa 2014 track the G bit for all segments except CS.
2422 * However, the SVM spec states that the G bit is not observed by the
2423 * CPU, and some VMware virtual CPUs drop the G bit for all segments.
2424 * So let's synthesize a legal G bit for all segments, this helps
2425 * running KVM nested. It also helps cross-vendor migration, because
2426 * Intel's vmentry has a check on the 'G' bit.
2428 var->g = s->limit > 0xfffff;
2431 * AMD's VMCB does not have an explicit unusable field, so emulate it
2432 * for cross vendor migration purposes by "not present"
2434 var->unusable = !var->present;
2439 * Work around a bug where the busy flag in the tr selector
2449 * The accessed bit must always be set in the segment
2450 * descriptor cache, although it can be cleared in the
2451 * descriptor, the cached bit always remains at 1. Since
2452 * Intel has a check on this, set it here to support
2453 * cross-vendor migration.
2460 * On AMD CPUs sometimes the DB bit in the segment
2461 * descriptor is left as 1, although the whole segment has
2462 * been made unusable. Clear it here to pass an Intel VMX
2463 * entry check when cross vendor migrating.
2467 /* This is symmetric with svm_set_segment() */
2468 var->dpl = to_svm(vcpu)->vmcb->save.cpl;
2473 static int svm_get_cpl(struct kvm_vcpu *vcpu)
2475 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
2480 static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
2482 struct vcpu_svm *svm = to_svm(vcpu);
2484 dt->size = svm->vmcb->save.idtr.limit;
2485 dt->address = svm->vmcb->save.idtr.base;
2488 static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
2490 struct vcpu_svm *svm = to_svm(vcpu);
2492 svm->vmcb->save.idtr.limit = dt->size;
2493 svm->vmcb->save.idtr.base = dt->address ;
2494 mark_dirty(svm->vmcb, VMCB_DT);
2497 static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
2499 struct vcpu_svm *svm = to_svm(vcpu);
2501 dt->size = svm->vmcb->save.gdtr.limit;
2502 dt->address = svm->vmcb->save.gdtr.base;
2505 static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
2507 struct vcpu_svm *svm = to_svm(vcpu);
2509 svm->vmcb->save.gdtr.limit = dt->size;
2510 svm->vmcb->save.gdtr.base = dt->address ;
2511 mark_dirty(svm->vmcb, VMCB_DT);
2514 static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
2518 static void svm_decache_cr3(struct kvm_vcpu *vcpu)
2522 static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
2526 static void update_cr0_intercept(struct vcpu_svm *svm)
2528 ulong gcr0 = svm->vcpu.arch.cr0;
2529 u64 *hcr0 = &svm->vmcb->save.cr0;
2531 *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
2532 | (gcr0 & SVM_CR0_SELECTIVE_MASK);
2534 mark_dirty(svm->vmcb, VMCB_CR);
2536 if (gcr0 == *hcr0) {
2537 clr_cr_intercept(svm, INTERCEPT_CR0_READ);
2538 clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
2540 set_cr_intercept(svm, INTERCEPT_CR0_READ);
2541 set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
2545 static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
2547 struct vcpu_svm *svm = to_svm(vcpu);
2549 #ifdef CONFIG_X86_64
2550 if (vcpu->arch.efer & EFER_LME) {
2551 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
2552 vcpu->arch.efer |= EFER_LMA;
2553 svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
2556 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
2557 vcpu->arch.efer &= ~EFER_LMA;
2558 svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
2562 vcpu->arch.cr0 = cr0;
2565 cr0 |= X86_CR0_PG | X86_CR0_WP;
2568 * re-enable caching here because the QEMU bios
2569 * does not do it - this results in some delay at
2572 if (kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED))
2573 cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
2574 svm->vmcb->save.cr0 = cr0;
2575 mark_dirty(svm->vmcb, VMCB_CR);
2576 update_cr0_intercept(svm);
2579 static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
2581 unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
2582 unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;
2584 if (cr4 & X86_CR4_VMXE)
2587 if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
2588 svm_flush_tlb(vcpu, true);
2590 vcpu->arch.cr4 = cr4;
2593 cr4 |= host_cr4_mce;
2594 to_svm(vcpu)->vmcb->save.cr4 = cr4;
2595 mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
2599 static void svm_set_segment(struct kvm_vcpu *vcpu,
2600 struct kvm_segment *var, int seg)
2602 struct vcpu_svm *svm = to_svm(vcpu);
2603 struct vmcb_seg *s = svm_seg(vcpu, seg);
2605 s->base = var->base;
2606 s->limit = var->limit;
2607 s->selector = var->selector;
2608 s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
2609 s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
2610 s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
2611 s->attrib |= ((var->present & 1) && !var->unusable) << SVM_SELECTOR_P_SHIFT;
2612 s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
2613 s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
2614 s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
2615 s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
2618 * This is always accurate, except if SYSRET returned to a segment
2619 * with SS.DPL != 3. Intel does not have this quirk, and always
2620 * forces SS.DPL to 3 on sysret, so we ignore that case; fixing it
2621 * would entail passing the CPL to userspace and back.
2623 if (seg == VCPU_SREG_SS)
2624 /* This is symmetric with svm_get_segment() */
2625 svm->vmcb->save.cpl = (var->dpl & 3);
2627 mark_dirty(svm->vmcb, VMCB_SEG);
2630 static void update_bp_intercept(struct kvm_vcpu *vcpu)
2632 struct vcpu_svm *svm = to_svm(vcpu);
2634 clr_exception_intercept(svm, BP_VECTOR);
2636 if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
2637 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
2638 set_exception_intercept(svm, BP_VECTOR);
2640 vcpu->guest_debug = 0;
2643 static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
2645 if (sd->next_asid > sd->max_asid) {
2646 ++sd->asid_generation;
2647 sd->next_asid = sd->min_asid;
2648 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
2651 svm->asid_generation = sd->asid_generation;
2652 svm->vmcb->control.asid = sd->next_asid++;
2654 mark_dirty(svm->vmcb, VMCB_ASID);
2657 static u64 svm_get_dr6(struct kvm_vcpu *vcpu)
2659 return to_svm(vcpu)->vmcb->save.dr6;
2662 static void svm_set_dr6(struct kvm_vcpu *vcpu, unsigned long value)
2664 struct vcpu_svm *svm = to_svm(vcpu);
2666 svm->vmcb->save.dr6 = value;
2667 mark_dirty(svm->vmcb, VMCB_DR);
2670 static void svm_sync_dirty_debug_regs(struct kvm_vcpu *vcpu)
2672 struct vcpu_svm *svm = to_svm(vcpu);
2674 get_debugreg(vcpu->arch.db[0], 0);
2675 get_debugreg(vcpu->arch.db[1], 1);
2676 get_debugreg(vcpu->arch.db[2], 2);
2677 get_debugreg(vcpu->arch.db[3], 3);
2678 vcpu->arch.dr6 = svm_get_dr6(vcpu);
2679 vcpu->arch.dr7 = svm->vmcb->save.dr7;
2681 vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_WONT_EXIT;
2682 set_dr_intercepts(svm);
2685 static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
2687 struct vcpu_svm *svm = to_svm(vcpu);
2689 svm->vmcb->save.dr7 = value;
2690 mark_dirty(svm->vmcb, VMCB_DR);
2693 static int pf_interception(struct vcpu_svm *svm)
2695 u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2696 u64 error_code = svm->vmcb->control.exit_info_1;
2698 return kvm_handle_page_fault(&svm->vcpu, error_code, fault_address,
2699 static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
2700 svm->vmcb->control.insn_bytes : NULL,
2701 svm->vmcb->control.insn_len);
2704 static int npf_interception(struct vcpu_svm *svm)
2706 u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2707 u64 error_code = svm->vmcb->control.exit_info_1;
2709 trace_kvm_page_fault(fault_address, error_code);
2710 return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code,
2711 static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
2712 svm->vmcb->control.insn_bytes : NULL,
2713 svm->vmcb->control.insn_len);
2716 static int db_interception(struct vcpu_svm *svm)
2718 struct kvm_run *kvm_run = svm->vcpu.run;
2719 struct kvm_vcpu *vcpu = &svm->vcpu;
2721 if (!(svm->vcpu.guest_debug &
2722 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
2723 !svm->nmi_singlestep) {
2724 kvm_queue_exception(&svm->vcpu, DB_VECTOR);
2728 if (svm->nmi_singlestep) {
2729 disable_nmi_singlestep(svm);
2730 /* Make sure we check for pending NMIs upon entry */
2731 kvm_make_request(KVM_REQ_EVENT, vcpu);
2734 if (svm->vcpu.guest_debug &
2735 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
2736 kvm_run->exit_reason = KVM_EXIT_DEBUG;
2737 kvm_run->debug.arch.pc =
2738 svm->vmcb->save.cs.base + svm->vmcb->save.rip;
2739 kvm_run->debug.arch.exception = DB_VECTOR;
2746 static int bp_interception(struct vcpu_svm *svm)
2748 struct kvm_run *kvm_run = svm->vcpu.run;
2750 kvm_run->exit_reason = KVM_EXIT_DEBUG;
2751 kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip;
2752 kvm_run->debug.arch.exception = BP_VECTOR;
2756 static int ud_interception(struct vcpu_svm *svm)
2758 return handle_ud(&svm->vcpu);
2761 static int ac_interception(struct vcpu_svm *svm)
2763 kvm_queue_exception_e(&svm->vcpu, AC_VECTOR, 0);
2767 static int gp_interception(struct vcpu_svm *svm)
2769 struct kvm_vcpu *vcpu = &svm->vcpu;
2770 u32 error_code = svm->vmcb->control.exit_info_1;
2772 WARN_ON_ONCE(!enable_vmware_backdoor);
2775 * VMware backdoor emulation on #GP interception only handles IN{S},
2776 * OUT{S}, and RDPMC, none of which generate a non-zero error code.
2779 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
2782 return kvm_emulate_instruction(vcpu, EMULTYPE_VMWARE_GP) !=
2786 static bool is_erratum_383(void)
2791 if (!erratum_383_found)
2794 value = native_read_msr_safe(MSR_IA32_MC0_STATUS, &err);
2798 /* Bit 62 may or may not be set for this mce */
2799 value &= ~(1ULL << 62);
2801 if (value != 0xb600000000010015ULL)
2804 /* Clear MCi_STATUS registers */
2805 for (i = 0; i < 6; ++i)
2806 native_write_msr_safe(MSR_IA32_MCx_STATUS(i), 0, 0);
2808 value = native_read_msr_safe(MSR_IA32_MCG_STATUS, &err);
2812 value &= ~(1ULL << 2);
2813 low = lower_32_bits(value);
2814 high = upper_32_bits(value);
2816 native_write_msr_safe(MSR_IA32_MCG_STATUS, low, high);
2819 /* Flush tlb to evict multi-match entries */
2825 static void svm_handle_mce(struct vcpu_svm *svm)
2827 if (is_erratum_383()) {
2829 * Erratum 383 triggered. Guest state is corrupt so kill the
2832 pr_err("KVM: Guest triggered AMD Erratum 383\n");
2834 kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
2840 * On an #MC intercept the MCE handler is not called automatically in
2841 * the host. So do it by hand here.
2845 /* not sure if we ever come back to this point */
2850 static int mc_interception(struct vcpu_svm *svm)
2855 static int shutdown_interception(struct vcpu_svm *svm)
2857 struct kvm_run *kvm_run = svm->vcpu.run;
2860 * VMCB is undefined after a SHUTDOWN intercept
2861 * so reinitialize it.
2863 clear_page(svm->vmcb);
2866 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
2870 static int io_interception(struct vcpu_svm *svm)
2872 struct kvm_vcpu *vcpu = &svm->vcpu;
2873 u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
2874 int size, in, string;
2877 ++svm->vcpu.stat.io_exits;
2878 string = (io_info & SVM_IOIO_STR_MASK) != 0;
2879 in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
2881 return kvm_emulate_instruction(vcpu, 0) == EMULATE_DONE;
2883 port = io_info >> 16;
2884 size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
2885 svm->next_rip = svm->vmcb->control.exit_info_2;
2887 return kvm_fast_pio(&svm->vcpu, size, port, in);
2890 static int nmi_interception(struct vcpu_svm *svm)
2895 static int intr_interception(struct vcpu_svm *svm)
2897 ++svm->vcpu.stat.irq_exits;
2901 static int nop_on_interception(struct vcpu_svm *svm)
2906 static int halt_interception(struct vcpu_svm *svm)
2908 return kvm_emulate_halt(&svm->vcpu);
2911 static int vmmcall_interception(struct vcpu_svm *svm)
2913 return kvm_emulate_hypercall(&svm->vcpu);
2916 static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
2918 struct vcpu_svm *svm = to_svm(vcpu);
2920 return svm->nested.nested_cr3;
2923 static u64 nested_svm_get_tdp_pdptr(struct kvm_vcpu *vcpu, int index)
2925 struct vcpu_svm *svm = to_svm(vcpu);
2926 u64 cr3 = svm->nested.nested_cr3;
2930 ret = kvm_vcpu_read_guest_page(vcpu, gpa_to_gfn(__sme_clr(cr3)), &pdpte,
2931 offset_in_page(cr3) + index * 8, 8);
2937 static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
2940 struct vcpu_svm *svm = to_svm(vcpu);
2942 svm->vmcb->control.nested_cr3 = __sme_set(root);
2943 mark_dirty(svm->vmcb, VMCB_NPT);
2946 static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
2947 struct x86_exception *fault)
2949 struct vcpu_svm *svm = to_svm(vcpu);
2951 if (svm->vmcb->control.exit_code != SVM_EXIT_NPF) {
2953 * TODO: track the cause of the nested page fault, and
2954 * correctly fill in the high bits of exit_info_1.
2956 svm->vmcb->control.exit_code = SVM_EXIT_NPF;
2957 svm->vmcb->control.exit_code_hi = 0;
2958 svm->vmcb->control.exit_info_1 = (1ULL << 32);
2959 svm->vmcb->control.exit_info_2 = fault->address;
2962 svm->vmcb->control.exit_info_1 &= ~0xffffffffULL;
2963 svm->vmcb->control.exit_info_1 |= fault->error_code;
2966 * The present bit is always zero for page structure faults on real
2969 if (svm->vmcb->control.exit_info_1 & (2ULL << 32))
2970 svm->vmcb->control.exit_info_1 &= ~1;
2972 nested_svm_vmexit(svm);
2975 static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
2977 WARN_ON(mmu_is_nested(vcpu));
2979 vcpu->arch.mmu = &vcpu->arch.guest_mmu;
2980 kvm_init_shadow_mmu(vcpu);
2981 vcpu->arch.mmu->set_cr3 = nested_svm_set_tdp_cr3;
2982 vcpu->arch.mmu->get_cr3 = nested_svm_get_tdp_cr3;
2983 vcpu->arch.mmu->get_pdptr = nested_svm_get_tdp_pdptr;
2984 vcpu->arch.mmu->inject_page_fault = nested_svm_inject_npf_exit;
2985 vcpu->arch.mmu->shadow_root_level = get_npt_level(vcpu);
2986 reset_shadow_zero_bits_mask(vcpu, vcpu->arch.mmu);
2987 vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu;
2990 static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
2992 vcpu->arch.mmu = &vcpu->arch.root_mmu;
2993 vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;
2996 static int nested_svm_check_permissions(struct vcpu_svm *svm)
2998 if (!(svm->vcpu.arch.efer & EFER_SVME) ||
2999 !is_paging(&svm->vcpu)) {
3000 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
3004 if (svm->vmcb->save.cpl) {
3005 kvm_inject_gp(&svm->vcpu, 0);
3012 static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
3013 bool has_error_code, u32 error_code)
3017 if (!is_guest_mode(&svm->vcpu))
3020 vmexit = nested_svm_intercept(svm);
3021 if (vmexit != NESTED_EXIT_DONE)
3024 svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
3025 svm->vmcb->control.exit_code_hi = 0;
3026 svm->vmcb->control.exit_info_1 = error_code;
3029 * EXITINFO2 is undefined for all exception intercepts other
3032 if (svm->vcpu.arch.exception.nested_apf)
3033 svm->vmcb->control.exit_info_2 = svm->vcpu.arch.apf.nested_apf_token;
3034 else if (svm->vcpu.arch.exception.has_payload)
3035 svm->vmcb->control.exit_info_2 = svm->vcpu.arch.exception.payload;
3037 svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
3039 svm->nested.exit_required = true;
3043 /* This function returns true if it is save to enable the irq window */
3044 static inline bool nested_svm_intr(struct vcpu_svm *svm)
3046 if (!is_guest_mode(&svm->vcpu))
3049 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
3052 if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
3056 * if vmexit was already requested (by intercepted exception
3057 * for instance) do not overwrite it with "external interrupt"
3060 if (svm->nested.exit_required)
3063 svm->vmcb->control.exit_code = SVM_EXIT_INTR;
3064 svm->vmcb->control.exit_info_1 = 0;
3065 svm->vmcb->control.exit_info_2 = 0;
3067 if (svm->nested.intercept & 1ULL) {
3069 * The #vmexit can't be emulated here directly because this
3070 * code path runs with irqs and preemption disabled. A
3071 * #vmexit emulation might sleep. Only signal request for
3074 svm->nested.exit_required = true;
3075 trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
3082 /* This function returns true if it is save to enable the nmi window */
3083 static inline bool nested_svm_nmi(struct vcpu_svm *svm)
3085 if (!is_guest_mode(&svm->vcpu))
3088 if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI)))
3091 svm->vmcb->control.exit_code = SVM_EXIT_NMI;
3092 svm->nested.exit_required = true;
3097 static int nested_svm_intercept_ioio(struct vcpu_svm *svm)
3099 unsigned port, size, iopm_len;
3104 if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT)))
3105 return NESTED_EXIT_HOST;
3107 port = svm->vmcb->control.exit_info_1 >> 16;
3108 size = (svm->vmcb->control.exit_info_1 & SVM_IOIO_SIZE_MASK) >>
3109 SVM_IOIO_SIZE_SHIFT;
3110 gpa = svm->nested.vmcb_iopm + (port / 8);
3111 start_bit = port % 8;
3112 iopm_len = (start_bit + size > 8) ? 2 : 1;
3113 mask = (0xf >> (4 - size)) << start_bit;
3116 if (kvm_vcpu_read_guest(&svm->vcpu, gpa, &val, iopm_len))
3117 return NESTED_EXIT_DONE;
3119 return (val & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
3122 static int nested_svm_exit_handled_msr(struct vcpu_svm *svm)
3124 u32 offset, msr, value;
3127 if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
3128 return NESTED_EXIT_HOST;
3130 msr = svm->vcpu.arch.regs[VCPU_REGS_RCX];
3131 offset = svm_msrpm_offset(msr);
3132 write = svm->vmcb->control.exit_info_1 & 1;
3133 mask = 1 << ((2 * (msr & 0xf)) + write);
3135 if (offset == MSR_INVALID)
3136 return NESTED_EXIT_DONE;
3138 /* Offset is in 32 bit units but need in 8 bit units */
3141 if (kvm_vcpu_read_guest(&svm->vcpu, svm->nested.vmcb_msrpm + offset, &value, 4))
3142 return NESTED_EXIT_DONE;
3144 return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
3147 /* DB exceptions for our internal use must not cause vmexit */
3148 static int nested_svm_intercept_db(struct vcpu_svm *svm)
3152 /* if we're not singlestepping, it's not ours */
3153 if (!svm->nmi_singlestep)
3154 return NESTED_EXIT_DONE;
3156 /* if it's not a singlestep exception, it's not ours */
3157 if (kvm_get_dr(&svm->vcpu, 6, &dr6))
3158 return NESTED_EXIT_DONE;
3159 if (!(dr6 & DR6_BS))
3160 return NESTED_EXIT_DONE;
3162 /* if the guest is singlestepping, it should get the vmexit */
3163 if (svm->nmi_singlestep_guest_rflags & X86_EFLAGS_TF) {
3164 disable_nmi_singlestep(svm);
3165 return NESTED_EXIT_DONE;
3168 /* it's ours, the nested hypervisor must not see this one */
3169 return NESTED_EXIT_HOST;
3172 static int nested_svm_exit_special(struct vcpu_svm *svm)
3174 u32 exit_code = svm->vmcb->control.exit_code;
3176 switch (exit_code) {
3179 case SVM_EXIT_EXCP_BASE + MC_VECTOR:
3180 return NESTED_EXIT_HOST;
3182 /* For now we are always handling NPFs when using them */
3184 return NESTED_EXIT_HOST;
3186 case SVM_EXIT_EXCP_BASE + PF_VECTOR:
3187 /* When we're shadowing, trap PFs, but not async PF */
3188 if (!npt_enabled && svm->vcpu.arch.apf.host_apf_reason == 0)
3189 return NESTED_EXIT_HOST;
3195 return NESTED_EXIT_CONTINUE;
3199 * If this function returns true, this #vmexit was already handled
3201 static int nested_svm_intercept(struct vcpu_svm *svm)
3203 u32 exit_code = svm->vmcb->control.exit_code;
3204 int vmexit = NESTED_EXIT_HOST;
3206 switch (exit_code) {
3208 vmexit = nested_svm_exit_handled_msr(svm);
3211 vmexit = nested_svm_intercept_ioio(svm);
3213 case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
3214 u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
3215 if (svm->nested.intercept_cr & bit)
3216 vmexit = NESTED_EXIT_DONE;
3219 case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
3220 u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
3221 if (svm->nested.intercept_dr & bit)
3222 vmexit = NESTED_EXIT_DONE;
3225 case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
3226 u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
3227 if (svm->nested.intercept_exceptions & excp_bits) {
3228 if (exit_code == SVM_EXIT_EXCP_BASE + DB_VECTOR)
3229 vmexit = nested_svm_intercept_db(svm);
3231 vmexit = NESTED_EXIT_DONE;
3233 /* async page fault always cause vmexit */
3234 else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
3235 svm->vcpu.arch.exception.nested_apf != 0)
3236 vmexit = NESTED_EXIT_DONE;
3239 case SVM_EXIT_ERR: {
3240 vmexit = NESTED_EXIT_DONE;
3244 u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
3245 if (svm->nested.intercept & exit_bits)
3246 vmexit = NESTED_EXIT_DONE;
3253 static int nested_svm_exit_handled(struct vcpu_svm *svm)
3257 vmexit = nested_svm_intercept(svm);
3259 if (vmexit == NESTED_EXIT_DONE)
3260 nested_svm_vmexit(svm);
3265 static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb)
3267 struct vmcb_control_area *dst = &dst_vmcb->control;
3268 struct vmcb_control_area *from = &from_vmcb->control;
3270 dst->intercept_cr = from->intercept_cr;
3271 dst->intercept_dr = from->intercept_dr;
3272 dst->intercept_exceptions = from->intercept_exceptions;
3273 dst->intercept = from->intercept;
3274 dst->iopm_base_pa = from->iopm_base_pa;
3275 dst->msrpm_base_pa = from->msrpm_base_pa;
3276 dst->tsc_offset = from->tsc_offset;
3277 dst->asid = from->asid;
3278 dst->tlb_ctl = from->tlb_ctl;
3279 dst->int_ctl = from->int_ctl;
3280 dst->int_vector = from->int_vector;
3281 dst->int_state = from->int_state;
3282 dst->exit_code = from->exit_code;
3283 dst->exit_code_hi = from->exit_code_hi;
3284 dst->exit_info_1 = from->exit_info_1;
3285 dst->exit_info_2 = from->exit_info_2;
3286 dst->exit_int_info = from->exit_int_info;
3287 dst->exit_int_info_err = from->exit_int_info_err;
3288 dst->nested_ctl = from->nested_ctl;
3289 dst->event_inj = from->event_inj;
3290 dst->event_inj_err = from->event_inj_err;
3291 dst->nested_cr3 = from->nested_cr3;
3292 dst->virt_ext = from->virt_ext;
3293 dst->pause_filter_count = from->pause_filter_count;
3294 dst->pause_filter_thresh = from->pause_filter_thresh;
3297 static int nested_svm_vmexit(struct vcpu_svm *svm)
3300 struct vmcb *nested_vmcb;
3301 struct vmcb *hsave = svm->nested.hsave;
3302 struct vmcb *vmcb = svm->vmcb;
3303 struct kvm_host_map map;
3305 trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
3306 vmcb->control.exit_info_1,
3307 vmcb->control.exit_info_2,
3308 vmcb->control.exit_int_info,
3309 vmcb->control.exit_int_info_err,
3312 rc = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(svm->nested.vmcb), &map);
3315 kvm_inject_gp(&svm->vcpu, 0);
3319 nested_vmcb = map.hva;
3321 /* Exit Guest-Mode */
3322 leave_guest_mode(&svm->vcpu);
3323 svm->nested.vmcb = 0;
3325 /* Give the current vmcb to the guest */
3328 nested_vmcb->save.es = vmcb->save.es;
3329 nested_vmcb->save.cs = vmcb->save.cs;
3330 nested_vmcb->save.ss = vmcb->save.ss;
3331 nested_vmcb->save.ds = vmcb->save.ds;
3332 nested_vmcb->save.gdtr = vmcb->save.gdtr;
3333 nested_vmcb->save.idtr = vmcb->save.idtr;
3334 nested_vmcb->save.efer = svm->vcpu.arch.efer;
3335 nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu);
3336 nested_vmcb->save.cr3 = kvm_read_cr3(&svm->vcpu);
3337 nested_vmcb->save.cr2 = vmcb->save.cr2;
3338 nested_vmcb->save.cr4 = svm->vcpu.arch.cr4;
3339 nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
3340 nested_vmcb->save.rip = vmcb->save.rip;
3341 nested_vmcb->save.rsp = vmcb->save.rsp;
3342 nested_vmcb->save.rax = vmcb->save.rax;
3343 nested_vmcb->save.dr7 = vmcb->save.dr7;
3344 nested_vmcb->save.dr6 = vmcb->save.dr6;
3345 nested_vmcb->save.cpl = vmcb->save.cpl;
3347 nested_vmcb->control.int_ctl = vmcb->control.int_ctl;
3348 nested_vmcb->control.int_vector = vmcb->control.int_vector;
3349 nested_vmcb->control.int_state = vmcb->control.int_state;
3350 nested_vmcb->control.exit_code = vmcb->control.exit_code;
3351 nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi;
3352 nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1;
3353 nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2;
3354 nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info;
3355 nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err;
3357 if (svm->nrips_enabled)
3358 nested_vmcb->control.next_rip = vmcb->control.next_rip;
3361 * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have
3362 * to make sure that we do not lose injected events. So check event_inj
3363 * here and copy it to exit_int_info if it is valid.
3364 * Exit_int_info and event_inj can't be both valid because the case
3365 * below only happens on a VMRUN instruction intercept which has
3366 * no valid exit_int_info set.
3368 if (vmcb->control.event_inj & SVM_EVTINJ_VALID) {
3369 struct vmcb_control_area *nc = &nested_vmcb->control;
3371 nc->exit_int_info = vmcb->control.event_inj;
3372 nc->exit_int_info_err = vmcb->control.event_inj_err;
3375 nested_vmcb->control.tlb_ctl = 0;
3376 nested_vmcb->control.event_inj = 0;
3377 nested_vmcb->control.event_inj_err = 0;
3379 nested_vmcb->control.pause_filter_count =
3380 svm->vmcb->control.pause_filter_count;
3381 nested_vmcb->control.pause_filter_thresh =
3382 svm->vmcb->control.pause_filter_thresh;
3384 /* We always set V_INTR_MASKING and remember the old value in hflags */
3385 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
3386 nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;
3388 /* Restore the original control entries */
3389 copy_vmcb_control_area(vmcb, hsave);
3391 svm->vcpu.arch.tsc_offset = svm->vmcb->control.tsc_offset;
3392 kvm_clear_exception_queue(&svm->vcpu);
3393 kvm_clear_interrupt_queue(&svm->vcpu);
3395 svm->nested.nested_cr3 = 0;
3397 /* Restore selected save entries */
3398 svm->vmcb->save.es = hsave->save.es;
3399 svm->vmcb->save.cs = hsave->save.cs;
3400 svm->vmcb->save.ss = hsave->save.ss;
3401 svm->vmcb->save.ds = hsave->save.ds;
3402 svm->vmcb->save.gdtr = hsave->save.gdtr;
3403 svm->vmcb->save.idtr = hsave->save.idtr;
3404 kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
3405 svm_set_efer(&svm->vcpu, hsave->save.efer);
3406 svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE);
3407 svm_set_cr4(&svm->vcpu, hsave->save.cr4);
3409 svm->vmcb->save.cr3 = hsave->save.cr3;
3410 svm->vcpu.arch.cr3 = hsave->save.cr3;
3412 (void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
3414 kvm_rax_write(&svm->vcpu, hsave->save.rax);
3415 kvm_rsp_write(&svm->vcpu, hsave->save.rsp);
3416 kvm_rip_write(&svm->vcpu, hsave->save.rip);
3417 svm->vmcb->save.dr7 = 0;
3418 svm->vmcb->save.cpl = 0;
3419 svm->vmcb->control.exit_int_info = 0;
3421 mark_all_dirty(svm->vmcb);
3423 kvm_vcpu_unmap(&svm->vcpu, &map, true);
3425 nested_svm_uninit_mmu_context(&svm->vcpu);
3426 kvm_mmu_reset_context(&svm->vcpu);
3427 kvm_mmu_load(&svm->vcpu);
3430 * Drop what we picked up for L2 via svm_complete_interrupts() so it
3431 * doesn't end up in L1.
3433 svm->vcpu.arch.nmi_injected = false;
3434 kvm_clear_exception_queue(&svm->vcpu);
3435 kvm_clear_interrupt_queue(&svm->vcpu);
3440 static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
3443 * This function merges the msr permission bitmaps of kvm and the
3444 * nested vmcb. It is optimized in that it only merges the parts where
3445 * the kvm msr permission bitmap may contain zero bits
3449 if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
3452 for (i = 0; i < MSRPM_OFFSETS; i++) {
3456 if (msrpm_offsets[i] == 0xffffffff)
3459 p = msrpm_offsets[i];
3460 offset = svm->nested.vmcb_msrpm + (p * 4);
3462 if (kvm_vcpu_read_guest(&svm->vcpu, offset, &value, 4))
3465 svm->nested.msrpm[p] = svm->msrpm[p] | value;
3468 svm->vmcb->control.msrpm_base_pa = __sme_set(__pa(svm->nested.msrpm));
3473 static bool nested_vmcb_checks(struct vmcb *vmcb)
3475 if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
3478 if (vmcb->control.asid == 0)
3481 if ((vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) &&
3488 static void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
3489 struct vmcb *nested_vmcb, struct kvm_host_map *map)
3491 if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
3492 svm->vcpu.arch.hflags |= HF_HIF_MASK;
3494 svm->vcpu.arch.hflags &= ~HF_HIF_MASK;
3496 if (nested_vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) {
3497 svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
3498 nested_svm_init_mmu_context(&svm->vcpu);
3501 /* Load the nested guest state */
3502 svm->vmcb->save.es = nested_vmcb->save.es;
3503 svm->vmcb->save.cs = nested_vmcb->save.cs;
3504 svm->vmcb->save.ss = nested_vmcb->save.ss;
3505 svm->vmcb->save.ds = nested_vmcb->save.ds;
3506 svm->vmcb->save.gdtr = nested_vmcb->save.gdtr;
3507 svm->vmcb->save.idtr = nested_vmcb->save.idtr;
3508 kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
3509 svm_set_efer(&svm->vcpu, nested_vmcb->save.efer);
3510 svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0);
3511 svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4);
3513 svm->vmcb->save.cr3 = nested_vmcb->save.cr3;
3514 svm->vcpu.arch.cr3 = nested_vmcb->save.cr3;
3516 (void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
3518 /* Guest paging mode is active - reset mmu */
3519 kvm_mmu_reset_context(&svm->vcpu);
3521 svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
3522 kvm_rax_write(&svm->vcpu, nested_vmcb->save.rax);
3523 kvm_rsp_write(&svm->vcpu, nested_vmcb->save.rsp);
3524 kvm_rip_write(&svm->vcpu, nested_vmcb->save.rip);
3526 /* In case we don't even reach vcpu_run, the fields are not updated */
3527 svm->vmcb->save.rax = nested_vmcb->save.rax;
3528 svm->vmcb->save.rsp = nested_vmcb->save.rsp;
3529 svm->vmcb->save.rip = nested_vmcb->save.rip;
3530 svm->vmcb->save.dr7 = nested_vmcb->save.dr7;
3531 svm->vmcb->save.dr6 = nested_vmcb->save.dr6;
3532 svm->vmcb->save.cpl = nested_vmcb->save.cpl;
3534 svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
3535 svm->nested.vmcb_iopm = nested_vmcb->control.iopm_base_pa & ~0x0fffULL;
3537 /* cache intercepts */
3538 svm->nested.intercept_cr = nested_vmcb->control.intercept_cr;
3539 svm->nested.intercept_dr = nested_vmcb->control.intercept_dr;
3540 svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
3541 svm->nested.intercept = nested_vmcb->control.intercept;
3543 svm_flush_tlb(&svm->vcpu, true);
3544 svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK;
3545 if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
3546 svm->vcpu.arch.hflags |= HF_VINTR_MASK;
3548 svm->vcpu.arch.hflags &= ~HF_VINTR_MASK;
3550 if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
3551 /* We only want the cr8 intercept bits of the guest */
3552 clr_cr_intercept(svm, INTERCEPT_CR8_READ);
3553 clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
3556 /* We don't want to see VMMCALLs from a nested guest */
3557 clr_intercept(svm, INTERCEPT_VMMCALL);
3559 svm->vcpu.arch.tsc_offset += nested_vmcb->control.tsc_offset;
3560 svm->vmcb->control.tsc_offset = svm->vcpu.arch.tsc_offset;
3562 svm->vmcb->control.virt_ext = nested_vmcb->control.virt_ext;
3563 svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
3564 svm->vmcb->control.int_state = nested_vmcb->control.int_state;
3565 svm->vmcb->control.event_inj = nested_vmcb->control.event_inj;
3566 svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err;
3568 svm->vmcb->control.pause_filter_count =
3569 nested_vmcb->control.pause_filter_count;
3570 svm->vmcb->control.pause_filter_thresh =
3571 nested_vmcb->control.pause_filter_thresh;
3573 kvm_vcpu_unmap(&svm->vcpu, map, true);
3575 /* Enter Guest-Mode */
3576 enter_guest_mode(&svm->vcpu);
3579 * Merge guest and host intercepts - must be called with vcpu in
3580 * guest-mode to take affect here
3582 recalc_intercepts(svm);
3584 svm->nested.vmcb = vmcb_gpa;
3588 mark_all_dirty(svm->vmcb);
3591 static int nested_svm_vmrun(struct vcpu_svm *svm)
3594 struct vmcb *nested_vmcb;
3595 struct vmcb *hsave = svm->nested.hsave;
3596 struct vmcb *vmcb = svm->vmcb;
3597 struct kvm_host_map map;
3600 vmcb_gpa = svm->vmcb->save.rax;
3602 ret = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(vmcb_gpa), &map);
3603 if (ret == -EINVAL) {
3604 kvm_inject_gp(&svm->vcpu, 0);
3607 return kvm_skip_emulated_instruction(&svm->vcpu);
3610 ret = kvm_skip_emulated_instruction(&svm->vcpu);
3612 nested_vmcb = map.hva;
3614 if (!nested_vmcb_checks(nested_vmcb)) {
3615 nested_vmcb->control.exit_code = SVM_EXIT_ERR;
3616 nested_vmcb->control.exit_code_hi = 0;
3617 nested_vmcb->control.exit_info_1 = 0;
3618 nested_vmcb->control.exit_info_2 = 0;
3620 kvm_vcpu_unmap(&svm->vcpu, &map, true);
3625 trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb_gpa,
3626 nested_vmcb->save.rip,
3627 nested_vmcb->control.int_ctl,
3628 nested_vmcb->control.event_inj,
3629 nested_vmcb->control.nested_ctl);
3631 trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff,
3632 nested_vmcb->control.intercept_cr >> 16,
3633 nested_vmcb->control.intercept_exceptions,
3634 nested_vmcb->control.intercept);
3636 /* Clear internal status */
3637 kvm_clear_exception_queue(&svm->vcpu);
3638 kvm_clear_interrupt_queue(&svm->vcpu);
3641 * Save the old vmcb, so we don't need to pick what we save, but can
3642 * restore everything when a VMEXIT occurs
3644 hsave->save.es = vmcb->save.es;
3645 hsave->save.cs = vmcb->save.cs;
3646 hsave->save.ss = vmcb->save.ss;
3647 hsave->save.ds = vmcb->save.ds;
3648 hsave->save.gdtr = vmcb->save.gdtr;
3649 hsave->save.idtr = vmcb->save.idtr;
3650 hsave->save.efer = svm->vcpu.arch.efer;
3651 hsave->save.cr0 = kvm_read_cr0(&svm->vcpu);
3652 hsave->save.cr4 = svm->vcpu.arch.cr4;
3653 hsave->save.rflags = kvm_get_rflags(&svm->vcpu);
3654 hsave->save.rip = kvm_rip_read(&svm->vcpu);
3655 hsave->save.rsp = vmcb->save.rsp;
3656 hsave->save.rax = vmcb->save.rax;
3658 hsave->save.cr3 = vmcb->save.cr3;
3660 hsave->save.cr3 = kvm_read_cr3(&svm->vcpu);
3662 copy_vmcb_control_area(hsave, vmcb);
3664 enter_svm_guest_mode(svm, vmcb_gpa, nested_vmcb, &map);
3666 if (!nested_svm_vmrun_msrpm(svm)) {
3667 svm->vmcb->control.exit_code = SVM_EXIT_ERR;
3668 svm->vmcb->control.exit_code_hi = 0;
3669 svm->vmcb->control.exit_info_1 = 0;
3670 svm->vmcb->control.exit_info_2 = 0;
3672 nested_svm_vmexit(svm);
3678 static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
3680 to_vmcb->save.fs = from_vmcb->save.fs;
3681 to_vmcb->save.gs = from_vmcb->save.gs;
3682 to_vmcb->save.tr = from_vmcb->save.tr;
3683 to_vmcb->save.ldtr = from_vmcb->save.ldtr;
3684 to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base;
3685 to_vmcb->save.star = from_vmcb->save.star;
3686 to_vmcb->save.lstar = from_vmcb->save.lstar;
3687 to_vmcb->save.cstar = from_vmcb->save.cstar;
3688 to_vmcb->save.sfmask = from_vmcb->save.sfmask;
3689 to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs;
3690 to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp;
3691 to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip;
3694 static int vmload_interception(struct vcpu_svm *svm)
3696 struct vmcb *nested_vmcb;
3697 struct kvm_host_map map;
3700 if (nested_svm_check_permissions(svm))
3703 ret = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(svm->vmcb->save.rax), &map);
3706 kvm_inject_gp(&svm->vcpu, 0);
3710 nested_vmcb = map.hva;
3712 ret = kvm_skip_emulated_instruction(&svm->vcpu);
3714 nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
3715 kvm_vcpu_unmap(&svm->vcpu, &map, true);
3720 static int vmsave_interception(struct vcpu_svm *svm)
3722 struct vmcb *nested_vmcb;
3723 struct kvm_host_map map;
3726 if (nested_svm_check_permissions(svm))
3729 ret = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(svm->vmcb->save.rax), &map);
3732 kvm_inject_gp(&svm->vcpu, 0);
3736 nested_vmcb = map.hva;
3738 ret = kvm_skip_emulated_instruction(&svm->vcpu);
3740 nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
3741 kvm_vcpu_unmap(&svm->vcpu, &map, true);
3746 static int vmrun_interception(struct vcpu_svm *svm)
3748 if (nested_svm_check_permissions(svm))
3751 return nested_svm_vmrun(svm);
3754 static int stgi_interception(struct vcpu_svm *svm)
3758 if (nested_svm_check_permissions(svm))
3762 * If VGIF is enabled, the STGI intercept is only added to
3763 * detect the opening of the SMI/NMI window; remove it now.
3765 if (vgif_enabled(svm))
3766 clr_intercept(svm, INTERCEPT_STGI);
3768 ret = kvm_skip_emulated_instruction(&svm->vcpu);
3769 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3776 static int clgi_interception(struct vcpu_svm *svm)
3780 if (nested_svm_check_permissions(svm))
3783 ret = kvm_skip_emulated_instruction(&svm->vcpu);
3787 /* After a CLGI no interrupts should come */
3788 if (!kvm_vcpu_apicv_active(&svm->vcpu)) {
3789 svm_clear_vintr(svm);
3790 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
3791 mark_dirty(svm->vmcb, VMCB_INTR);
3797 static int invlpga_interception(struct vcpu_svm *svm)
3799 struct kvm_vcpu *vcpu = &svm->vcpu;
3801 trace_kvm_invlpga(svm->vmcb->save.rip, kvm_rcx_read(&svm->vcpu),
3802 kvm_rax_read(&svm->vcpu));
3804 /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
3805 kvm_mmu_invlpg(vcpu, kvm_rax_read(&svm->vcpu));
3807 return kvm_skip_emulated_instruction(&svm->vcpu);
3810 static int skinit_interception(struct vcpu_svm *svm)
3812 trace_kvm_skinit(svm->vmcb->save.rip, kvm_rax_read(&svm->vcpu));
3814 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
3818 static int wbinvd_interception(struct vcpu_svm *svm)
3820 return kvm_emulate_wbinvd(&svm->vcpu);
3823 static int xsetbv_interception(struct vcpu_svm *svm)
3825 u64 new_bv = kvm_read_edx_eax(&svm->vcpu);
3826 u32 index = kvm_rcx_read(&svm->vcpu);
3828 if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) {
3829 return kvm_skip_emulated_instruction(&svm->vcpu);
3835 static int task_switch_interception(struct vcpu_svm *svm)
3839 int int_type = svm->vmcb->control.exit_int_info &
3840 SVM_EXITINTINFO_TYPE_MASK;
3841 int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
3843 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK;
3845 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID;
3846 bool has_error_code = false;
3849 tss_selector = (u16)svm->vmcb->control.exit_info_1;
3851 if (svm->vmcb->control.exit_info_2 &
3852 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
3853 reason = TASK_SWITCH_IRET;
3854 else if (svm->vmcb->control.exit_info_2 &
3855 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
3856 reason = TASK_SWITCH_JMP;
3858 reason = TASK_SWITCH_GATE;
3860 reason = TASK_SWITCH_CALL;
3862 if (reason == TASK_SWITCH_GATE) {
3864 case SVM_EXITINTINFO_TYPE_NMI:
3865 svm->vcpu.arch.nmi_injected = false;
3867 case SVM_EXITINTINFO_TYPE_EXEPT:
3868 if (svm->vmcb->control.exit_info_2 &
3869 (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE)) {
3870 has_error_code = true;
3872 (u32)svm->vmcb->control.exit_info_2;
3874 kvm_clear_exception_queue(&svm->vcpu);
3876 case SVM_EXITINTINFO_TYPE_INTR:
3877 kvm_clear_interrupt_queue(&svm->vcpu);
3884 if (reason != TASK_SWITCH_GATE ||
3885 int_type == SVM_EXITINTINFO_TYPE_SOFT ||
3886 (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
3887 (int_vec == OF_VECTOR || int_vec == BP_VECTOR))) {
3888 if (skip_emulated_instruction(&svm->vcpu) == EMULATE_USER_EXIT)
3892 if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
3897 return kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
3898 has_error_code, error_code) != EMULATE_USER_EXIT;
3901 static int cpuid_interception(struct vcpu_svm *svm)
3903 return kvm_emulate_cpuid(&svm->vcpu);
3906 static int iret_interception(struct vcpu_svm *svm)
3908 ++svm->vcpu.stat.nmi_window_exits;
3909 clr_intercept(svm, INTERCEPT_IRET);
3910 svm->vcpu.arch.hflags |= HF_IRET_MASK;
3911 svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
3912 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3916 static int invlpg_interception(struct vcpu_svm *svm)
3918 if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
3919 return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
3921 kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
3922 return kvm_skip_emulated_instruction(&svm->vcpu);
3925 static int emulate_on_interception(struct vcpu_svm *svm)
3927 return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
3930 static int rsm_interception(struct vcpu_svm *svm)
3932 return kvm_emulate_instruction_from_buffer(&svm->vcpu,
3933 rsm_ins_bytes, 2) == EMULATE_DONE;
3936 static int rdpmc_interception(struct vcpu_svm *svm)
3941 return emulate_on_interception(svm);
3943 err = kvm_rdpmc(&svm->vcpu);
3944 return kvm_complete_insn_gp(&svm->vcpu, err);
3947 static bool check_selective_cr0_intercepted(struct vcpu_svm *svm,
3950 unsigned long cr0 = svm->vcpu.arch.cr0;
3954 intercept = svm->nested.intercept;
3956 if (!is_guest_mode(&svm->vcpu) ||
3957 (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0))))
3960 cr0 &= ~SVM_CR0_SELECTIVE_MASK;
3961 val &= ~SVM_CR0_SELECTIVE_MASK;
3964 svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE;
3965 ret = (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE);
3971 #define CR_VALID (1ULL << 63)
3973 static int cr_interception(struct vcpu_svm *svm)
3979 if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
3980 return emulate_on_interception(svm);
3982 if (unlikely((svm->vmcb->control.exit_info_1 & CR_VALID) == 0))
3983 return emulate_on_interception(svm);
3985 reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
3986 if (svm->vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE)
3987 cr = SVM_EXIT_WRITE_CR0 - SVM_EXIT_READ_CR0;
3989 cr = svm->vmcb->control.exit_code - SVM_EXIT_READ_CR0;
3992 if (cr >= 16) { /* mov to cr */
3994 val = kvm_register_read(&svm->vcpu, reg);
3997 if (!check_selective_cr0_intercepted(svm, val))
3998 err = kvm_set_cr0(&svm->vcpu, val);
4004 err = kvm_set_cr3(&svm->vcpu, val);
4007 err = kvm_set_cr4(&svm->vcpu, val);
4010 err = kvm_set_cr8(&svm->vcpu, val);
4013 WARN(1, "unhandled write to CR%d", cr);
4014 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
4017 } else { /* mov from cr */
4020 val = kvm_read_cr0(&svm->vcpu);
4023 val = svm->vcpu.arch.cr2;
4026 val = kvm_read_cr3(&svm->vcpu);
4029 val = kvm_read_cr4(&svm->vcpu);
4032 val = kvm_get_cr8(&svm->vcpu);
4035 WARN(1, "unhandled read from CR%d", cr);
4036 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
4039 kvm_register_write(&svm->vcpu, reg, val);
4041 return kvm_complete_insn_gp(&svm->vcpu, err);
4044 static int dr_interception(struct vcpu_svm *svm)
4049 if (svm->vcpu.guest_debug == 0) {
4051 * No more DR vmexits; force a reload of the debug registers
4052 * and reenter on this instruction. The next vmexit will
4053 * retrieve the full state of the debug registers.
4055 clr_dr_intercepts(svm);
4056 svm->vcpu.arch.switch_db_regs |= KVM_DEBUGREG_WONT_EXIT;
4060 if (!boot_cpu_has(X86_FEATURE_DECODEASSISTS))
4061 return emulate_on_interception(svm);
4063 reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
4064 dr = svm->vmcb->control.exit_code - SVM_EXIT_READ_DR0;
4066 if (dr >= 16) { /* mov to DRn */
4067 if (!kvm_require_dr(&svm->vcpu, dr - 16))
4069 val = kvm_register_read(&svm->vcpu, reg);
4070 kvm_set_dr(&svm->vcpu, dr - 16, val);
4072 if (!kvm_require_dr(&svm->vcpu, dr))
4074 kvm_get_dr(&svm->vcpu, dr, &val);
4075 kvm_register_write(&svm->vcpu, reg, val);
4078 return kvm_skip_emulated_instruction(&svm->vcpu);
4081 static int cr8_write_interception(struct vcpu_svm *svm)
4083 struct kvm_run *kvm_run = svm->vcpu.run;
4086 u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
4087 /* instruction emulation calls kvm_set_cr8() */
4088 r = cr_interception(svm);
4089 if (lapic_in_kernel(&svm->vcpu))
4091 if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
4093 kvm_run->exit_reason = KVM_EXIT_SET_TPR;
4097 static int svm_get_msr_feature(struct kvm_msr_entry *msr)
4101 switch (msr->index) {
4102 case MSR_F10H_DECFG:
4103 if (boot_cpu_has(X86_FEATURE_LFENCE_RDTSC))
4104 msr->data |= MSR_F10H_DECFG_LFENCE_SERIALIZE;
4113 static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
4115 struct vcpu_svm *svm = to_svm(vcpu);
4117 switch (msr_info->index) {
4119 msr_info->data = svm->vmcb->save.star;
4121 #ifdef CONFIG_X86_64
4123 msr_info->data = svm->vmcb->save.lstar;
4126 msr_info->data = svm->vmcb->save.cstar;
4128 case MSR_KERNEL_GS_BASE:
4129 msr_info->data = svm->vmcb->save.kernel_gs_base;
4131 case MSR_SYSCALL_MASK:
4132 msr_info->data = svm->vmcb->save.sfmask;
4135 case MSR_IA32_SYSENTER_CS:
4136 msr_info->data = svm->vmcb->save.sysenter_cs;
4138 case MSR_IA32_SYSENTER_EIP:
4139 msr_info->data = svm->sysenter_eip;
4141 case MSR_IA32_SYSENTER_ESP:
4142 msr_info->data = svm->sysenter_esp;
4145 if (!boot_cpu_has(X86_FEATURE_RDTSCP))
4147 msr_info->data = svm->tsc_aux;
4150 * Nobody will change the following 5 values in the VMCB so we can
4151 * safely return them on rdmsr. They will always be 0 until LBRV is
4154 case MSR_IA32_DEBUGCTLMSR:
4155 msr_info->data = svm->vmcb->save.dbgctl;
4157 case MSR_IA32_LASTBRANCHFROMIP:
4158 msr_info->data = svm->vmcb->save.br_from;
4160 case MSR_IA32_LASTBRANCHTOIP:
4161 msr_info->data = svm->vmcb->save.br_to;
4163 case MSR_IA32_LASTINTFROMIP:
4164 msr_info->data = svm->vmcb->save.last_excp_from;
4166 case MSR_IA32_LASTINTTOIP:
4167 msr_info->data = svm->vmcb->save.last_excp_to;
4169 case MSR_VM_HSAVE_PA:
4170 msr_info->data = svm->nested.hsave_msr;
4173 msr_info->data = svm->nested.vm_cr_msr;
4175 case MSR_IA32_SPEC_CTRL:
4176 if (!msr_info->host_initiated &&
4177 !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
4178 !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4181 msr_info->data = svm->spec_ctrl;
4183 case MSR_AMD64_VIRT_SPEC_CTRL:
4184 if (!msr_info->host_initiated &&
4185 !guest_cpuid_has(vcpu, X86_FEATURE_VIRT_SSBD))
4188 msr_info->data = svm->virt_spec_ctrl;
4190 case MSR_F15H_IC_CFG: {
4194 family = guest_cpuid_family(vcpu);
4195 model = guest_cpuid_model(vcpu);
4197 if (family < 0 || model < 0)
4198 return kvm_get_msr_common(vcpu, msr_info);
4202 if (family == 0x15 &&
4203 (model >= 0x2 && model < 0x20))
4204 msr_info->data = 0x1E;
4207 case MSR_F10H_DECFG:
4208 msr_info->data = svm->msr_decfg;
4211 return kvm_get_msr_common(vcpu, msr_info);
4216 static int rdmsr_interception(struct vcpu_svm *svm)
4218 return kvm_emulate_rdmsr(&svm->vcpu);
4221 static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data)
4223 struct vcpu_svm *svm = to_svm(vcpu);
4224 int svm_dis, chg_mask;
4226 if (data & ~SVM_VM_CR_VALID_MASK)
4229 chg_mask = SVM_VM_CR_VALID_MASK;
4231 if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK)
4232 chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK);
4234 svm->nested.vm_cr_msr &= ~chg_mask;
4235 svm->nested.vm_cr_msr |= (data & chg_mask);
4237 svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK;
4239 /* check for svm_disable while efer.svme is set */
4240 if (svm_dis && (vcpu->arch.efer & EFER_SVME))
4246 static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
4248 struct vcpu_svm *svm = to_svm(vcpu);
4250 u32 ecx = msr->index;
4251 u64 data = msr->data;
4253 case MSR_IA32_CR_PAT:
4254 if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data))
4256 vcpu->arch.pat = data;
4257 svm->vmcb->save.g_pat = data;
4258 mark_dirty(svm->vmcb, VMCB_NPT);
4260 case MSR_IA32_SPEC_CTRL:
4261 if (!msr->host_initiated &&
4262 !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
4263 !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4266 /* The STIBP bit doesn't fault even if it's not advertised */
4267 if (data & ~(SPEC_CTRL_IBRS | SPEC_CTRL_STIBP | SPEC_CTRL_SSBD))
4270 svm->spec_ctrl = data;
4277 * When it's written (to non-zero) for the first time, pass
4281 * The handling of the MSR bitmap for L2 guests is done in
4282 * nested_svm_vmrun_msrpm.
4283 * We update the L1 MSR bit as well since it will end up
4284 * touching the MSR anyway now.
4286 set_msr_interception(svm->msrpm, MSR_IA32_SPEC_CTRL, 1, 1);
4288 case MSR_IA32_PRED_CMD:
4289 if (!msr->host_initiated &&
4290 !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBPB))
4293 if (data & ~PRED_CMD_IBPB)
4299 wrmsrl(MSR_IA32_PRED_CMD, PRED_CMD_IBPB);
4300 if (is_guest_mode(vcpu))
4302 set_msr_interception(svm->msrpm, MSR_IA32_PRED_CMD, 0, 1);
4304 case MSR_AMD64_VIRT_SPEC_CTRL:
4305 if (!msr->host_initiated &&
4306 !guest_cpuid_has(vcpu, X86_FEATURE_VIRT_SSBD))
4309 if (data & ~SPEC_CTRL_SSBD)
4312 svm->virt_spec_ctrl = data;
4315 svm->vmcb->save.star = data;
4317 #ifdef CONFIG_X86_64
4319 svm->vmcb->save.lstar = data;
4322 svm->vmcb->save.cstar = data;
4324 case MSR_KERNEL_GS_BASE:
4325 svm->vmcb->save.kernel_gs_base = data;
4327 case MSR_SYSCALL_MASK:
4328 svm->vmcb->save.sfmask = data;
4331 case MSR_IA32_SYSENTER_CS:
4332 svm->vmcb->save.sysenter_cs = data;
4334 case MSR_IA32_SYSENTER_EIP:
4335 svm->sysenter_eip = data;
4336 svm->vmcb->save.sysenter_eip = data;
4338 case MSR_IA32_SYSENTER_ESP:
4339 svm->sysenter_esp = data;
4340 svm->vmcb->save.sysenter_esp = data;
4343 if (!boot_cpu_has(X86_FEATURE_RDTSCP))
4347 * This is rare, so we update the MSR here instead of using
4348 * direct_access_msrs. Doing that would require a rdmsr in
4351 svm->tsc_aux = data;
4352 wrmsrl(MSR_TSC_AUX, svm->tsc_aux);
4354 case MSR_IA32_DEBUGCTLMSR:
4355 if (!boot_cpu_has(X86_FEATURE_LBRV)) {
4356 vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
4360 if (data & DEBUGCTL_RESERVED_BITS)
4363 svm->vmcb->save.dbgctl = data;
4364 mark_dirty(svm->vmcb, VMCB_LBR);
4365 if (data & (1ULL<<0))
4366 svm_enable_lbrv(svm);
4368 svm_disable_lbrv(svm);
4370 case MSR_VM_HSAVE_PA:
4371 svm->nested.hsave_msr = data;
4374 return svm_set_vm_cr(vcpu, data);
4376 vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
4378 case MSR_F10H_DECFG: {
4379 struct kvm_msr_entry msr_entry;
4381 msr_entry.index = msr->index;
4382 if (svm_get_msr_feature(&msr_entry))
4385 /* Check the supported bits */
4386 if (data & ~msr_entry.data)
4389 /* Don't allow the guest to change a bit, #GP */
4390 if (!msr->host_initiated && (data ^ msr_entry.data))
4393 svm->msr_decfg = data;
4396 case MSR_IA32_APICBASE:
4397 if (kvm_vcpu_apicv_active(vcpu))
4398 avic_update_vapic_bar(to_svm(vcpu), data);
4401 return kvm_set_msr_common(vcpu, msr);
4406 static int wrmsr_interception(struct vcpu_svm *svm)
4408 return kvm_emulate_wrmsr(&svm->vcpu);
4411 static int msr_interception(struct vcpu_svm *svm)
4413 if (svm->vmcb->control.exit_info_1)
4414 return wrmsr_interception(svm);
4416 return rdmsr_interception(svm);
4419 static int interrupt_window_interception(struct vcpu_svm *svm)
4421 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
4422 svm_clear_vintr(svm);
4423 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
4424 mark_dirty(svm->vmcb, VMCB_INTR);
4425 ++svm->vcpu.stat.irq_window_exits;
4429 static int pause_interception(struct vcpu_svm *svm)
4431 struct kvm_vcpu *vcpu = &svm->vcpu;
4432 bool in_kernel = (svm_get_cpl(vcpu) == 0);
4434 if (pause_filter_thresh)
4435 grow_ple_window(vcpu);
4437 kvm_vcpu_on_spin(vcpu, in_kernel);
4441 static int nop_interception(struct vcpu_svm *svm)
4443 return kvm_skip_emulated_instruction(&(svm->vcpu));
4446 static int monitor_interception(struct vcpu_svm *svm)
4448 printk_once(KERN_WARNING "kvm: MONITOR instruction emulated as NOP!\n");
4449 return nop_interception(svm);
4452 static int mwait_interception(struct vcpu_svm *svm)
4454 printk_once(KERN_WARNING "kvm: MWAIT instruction emulated as NOP!\n");
4455 return nop_interception(svm);
4458 enum avic_ipi_failure_cause {
4459 AVIC_IPI_FAILURE_INVALID_INT_TYPE,
4460 AVIC_IPI_FAILURE_TARGET_NOT_RUNNING,
4461 AVIC_IPI_FAILURE_INVALID_TARGET,
4462 AVIC_IPI_FAILURE_INVALID_BACKING_PAGE,
4465 static int avic_incomplete_ipi_interception(struct vcpu_svm *svm)
4467 u32 icrh = svm->vmcb->control.exit_info_1 >> 32;
4468 u32 icrl = svm->vmcb->control.exit_info_1;
4469 u32 id = svm->vmcb->control.exit_info_2 >> 32;
4470 u32 index = svm->vmcb->control.exit_info_2 & 0xFF;
4471 struct kvm_lapic *apic = svm->vcpu.arch.apic;
4473 trace_kvm_avic_incomplete_ipi(svm->vcpu.vcpu_id, icrh, icrl, id, index);
4476 case AVIC_IPI_FAILURE_INVALID_INT_TYPE:
4478 * AVIC hardware handles the generation of
4479 * IPIs when the specified Message Type is Fixed
4480 * (also known as fixed delivery mode) and
4481 * the Trigger Mode is edge-triggered. The hardware
4482 * also supports self and broadcast delivery modes
4483 * specified via the Destination Shorthand(DSH)
4484 * field of the ICRL. Logical and physical APIC ID
4485 * formats are supported. All other IPI types cause
4486 * a #VMEXIT, which needs to emulated.
4488 kvm_lapic_reg_write(apic, APIC_ICR2, icrh);
4489 kvm_lapic_reg_write(apic, APIC_ICR, icrl);
4491 case AVIC_IPI_FAILURE_TARGET_NOT_RUNNING: {
4493 struct kvm_vcpu *vcpu;
4494 struct kvm *kvm = svm->vcpu.kvm;
4495 struct kvm_lapic *apic = svm->vcpu.arch.apic;
4498 * At this point, we expect that the AVIC HW has already
4499 * set the appropriate IRR bits on the valid target
4500 * vcpus. So, we just need to kick the appropriate vcpu.
4502 kvm_for_each_vcpu(i, vcpu, kvm) {
4503 bool m = kvm_apic_match_dest(vcpu, apic,
4504 icrl & KVM_APIC_SHORT_MASK,
4505 GET_APIC_DEST_FIELD(icrh),
4506 icrl & KVM_APIC_DEST_MASK);
4508 if (m && !avic_vcpu_is_running(vcpu))
4509 kvm_vcpu_wake_up(vcpu);
4513 case AVIC_IPI_FAILURE_INVALID_TARGET:
4514 WARN_ONCE(1, "Invalid IPI target: index=%u, vcpu=%d, icr=%#0x:%#0x\n",
4515 index, svm->vcpu.vcpu_id, icrh, icrl);
4517 case AVIC_IPI_FAILURE_INVALID_BACKING_PAGE:
4518 WARN_ONCE(1, "Invalid backing page\n");
4521 pr_err("Unknown IPI interception\n");
4527 static u32 *avic_get_logical_id_entry(struct kvm_vcpu *vcpu, u32 ldr, bool flat)
4529 struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
4531 u32 *logical_apic_id_table;
4532 int dlid = GET_APIC_LOGICAL_ID(ldr);
4537 if (flat) { /* flat */
4538 index = ffs(dlid) - 1;
4541 } else { /* cluster */
4542 int cluster = (dlid & 0xf0) >> 4;
4543 int apic = ffs(dlid & 0x0f) - 1;
4545 if ((apic < 0) || (apic > 7) ||
4548 index = (cluster << 2) + apic;
4551 logical_apic_id_table = (u32 *) page_address(kvm_svm->avic_logical_id_table_page);
4553 return &logical_apic_id_table[index];
4556 static int avic_ldr_write(struct kvm_vcpu *vcpu, u8 g_physical_id, u32 ldr)
4559 u32 *entry, new_entry;
4561 flat = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR) == APIC_DFR_FLAT;
4562 entry = avic_get_logical_id_entry(vcpu, ldr, flat);
4566 new_entry = READ_ONCE(*entry);
4567 new_entry &= ~AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK;
4568 new_entry |= (g_physical_id & AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK);
4569 new_entry |= AVIC_LOGICAL_ID_ENTRY_VALID_MASK;
4570 WRITE_ONCE(*entry, new_entry);
4575 static void avic_invalidate_logical_id_entry(struct kvm_vcpu *vcpu)
4577 struct vcpu_svm *svm = to_svm(vcpu);
4578 bool flat = svm->dfr_reg == APIC_DFR_FLAT;
4579 u32 *entry = avic_get_logical_id_entry(vcpu, svm->ldr_reg, flat);
4582 clear_bit(AVIC_LOGICAL_ID_ENTRY_VALID_BIT, (unsigned long *)entry);
4585 static int avic_handle_ldr_update(struct kvm_vcpu *vcpu)
4588 struct vcpu_svm *svm = to_svm(vcpu);
4589 u32 ldr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_LDR);
4591 if (ldr == svm->ldr_reg)
4594 avic_invalidate_logical_id_entry(vcpu);
4597 ret = avic_ldr_write(vcpu, vcpu->vcpu_id, ldr);
4605 static int avic_handle_apic_id_update(struct kvm_vcpu *vcpu)
4608 struct vcpu_svm *svm = to_svm(vcpu);
4609 u32 apic_id_reg = kvm_lapic_get_reg(vcpu->arch.apic, APIC_ID);
4610 u32 id = (apic_id_reg >> 24) & 0xff;
4612 if (vcpu->vcpu_id == id)
4615 old = avic_get_physical_id_entry(vcpu, vcpu->vcpu_id);
4616 new = avic_get_physical_id_entry(vcpu, id);
4620 /* We need to move physical_id_entry to new offset */
4623 to_svm(vcpu)->avic_physical_id_cache = new;
4626 * Also update the guest physical APIC ID in the logical
4627 * APIC ID table entry if already setup the LDR.
4630 avic_handle_ldr_update(vcpu);
4635 static void avic_handle_dfr_update(struct kvm_vcpu *vcpu)
4637 struct vcpu_svm *svm = to_svm(vcpu);
4638 u32 dfr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR);
4640 if (svm->dfr_reg == dfr)
4643 avic_invalidate_logical_id_entry(vcpu);
4647 static int avic_unaccel_trap_write(struct vcpu_svm *svm)
4649 struct kvm_lapic *apic = svm->vcpu.arch.apic;
4650 u32 offset = svm->vmcb->control.exit_info_1 &
4651 AVIC_UNACCEL_ACCESS_OFFSET_MASK;
4655 if (avic_handle_apic_id_update(&svm->vcpu))
4659 if (avic_handle_ldr_update(&svm->vcpu))
4663 avic_handle_dfr_update(&svm->vcpu);
4669 kvm_lapic_reg_write(apic, offset, kvm_lapic_get_reg(apic, offset));
4674 static bool is_avic_unaccelerated_access_trap(u32 offset)
4703 static int avic_unaccelerated_access_interception(struct vcpu_svm *svm)
4706 u32 offset = svm->vmcb->control.exit_info_1 &
4707 AVIC_UNACCEL_ACCESS_OFFSET_MASK;
4708 u32 vector = svm->vmcb->control.exit_info_2 &
4709 AVIC_UNACCEL_ACCESS_VECTOR_MASK;
4710 bool write = (svm->vmcb->control.exit_info_1 >> 32) &
4711 AVIC_UNACCEL_ACCESS_WRITE_MASK;
4712 bool trap = is_avic_unaccelerated_access_trap(offset);
4714 trace_kvm_avic_unaccelerated_access(svm->vcpu.vcpu_id, offset,
4715 trap, write, vector);
4718 WARN_ONCE(!write, "svm: Handling trap read.\n");
4719 ret = avic_unaccel_trap_write(svm);
4721 /* Handling Fault */
4722 ret = (kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE);
4728 static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
4729 [SVM_EXIT_READ_CR0] = cr_interception,
4730 [SVM_EXIT_READ_CR3] = cr_interception,
4731 [SVM_EXIT_READ_CR4] = cr_interception,
4732 [SVM_EXIT_READ_CR8] = cr_interception,
4733 [SVM_EXIT_CR0_SEL_WRITE] = cr_interception,
4734 [SVM_EXIT_WRITE_CR0] = cr_interception,
4735 [SVM_EXIT_WRITE_CR3] = cr_interception,
4736 [SVM_EXIT_WRITE_CR4] = cr_interception,
4737 [SVM_EXIT_WRITE_CR8] = cr8_write_interception,
4738 [SVM_EXIT_READ_DR0] = dr_interception,
4739 [SVM_EXIT_READ_DR1] = dr_interception,
4740 [SVM_EXIT_READ_DR2] = dr_interception,
4741 [SVM_EXIT_READ_DR3] = dr_interception,
4742 [SVM_EXIT_READ_DR4] = dr_interception,
4743 [SVM_EXIT_READ_DR5] = dr_interception,
4744 [SVM_EXIT_READ_DR6] = dr_interception,
4745 [SVM_EXIT_READ_DR7] = dr_interception,
4746 [SVM_EXIT_WRITE_DR0] = dr_interception,
4747 [SVM_EXIT_WRITE_DR1] = dr_interception,
4748 [SVM_EXIT_WRITE_DR2] = dr_interception,
4749 [SVM_EXIT_WRITE_DR3] = dr_interception,
4750 [SVM_EXIT_WRITE_DR4] = dr_interception,
4751 [SVM_EXIT_WRITE_DR5] = dr_interception,
4752 [SVM_EXIT_WRITE_DR6] = dr_interception,
4753 [SVM_EXIT_WRITE_DR7] = dr_interception,
4754 [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception,
4755 [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception,
4756 [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception,
4757 [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception,
4758 [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception,
4759 [SVM_EXIT_EXCP_BASE + AC_VECTOR] = ac_interception,
4760 [SVM_EXIT_EXCP_BASE + GP_VECTOR] = gp_interception,
4761 [SVM_EXIT_INTR] = intr_interception,
4762 [SVM_EXIT_NMI] = nmi_interception,
4763 [SVM_EXIT_SMI] = nop_on_interception,
4764 [SVM_EXIT_INIT] = nop_on_interception,
4765 [SVM_EXIT_VINTR] = interrupt_window_interception,
4766 [SVM_EXIT_RDPMC] = rdpmc_interception,
4767 [SVM_EXIT_CPUID] = cpuid_interception,
4768 [SVM_EXIT_IRET] = iret_interception,
4769 [SVM_EXIT_INVD] = emulate_on_interception,
4770 [SVM_EXIT_PAUSE] = pause_interception,
4771 [SVM_EXIT_HLT] = halt_interception,
4772 [SVM_EXIT_INVLPG] = invlpg_interception,
4773 [SVM_EXIT_INVLPGA] = invlpga_interception,
4774 [SVM_EXIT_IOIO] = io_interception,
4775 [SVM_EXIT_MSR] = msr_interception,
4776 [SVM_EXIT_TASK_SWITCH] = task_switch_interception,
4777 [SVM_EXIT_SHUTDOWN] = shutdown_interception,
4778 [SVM_EXIT_VMRUN] = vmrun_interception,
4779 [SVM_EXIT_VMMCALL] = vmmcall_interception,
4780 [SVM_EXIT_VMLOAD] = vmload_interception,
4781 [SVM_EXIT_VMSAVE] = vmsave_interception,
4782 [SVM_EXIT_STGI] = stgi_interception,
4783 [SVM_EXIT_CLGI] = clgi_interception,
4784 [SVM_EXIT_SKINIT] = skinit_interception,
4785 [SVM_EXIT_WBINVD] = wbinvd_interception,
4786 [SVM_EXIT_MONITOR] = monitor_interception,
4787 [SVM_EXIT_MWAIT] = mwait_interception,
4788 [SVM_EXIT_XSETBV] = xsetbv_interception,
4789 [SVM_EXIT_NPF] = npf_interception,
4790 [SVM_EXIT_RSM] = rsm_interception,
4791 [SVM_EXIT_AVIC_INCOMPLETE_IPI] = avic_incomplete_ipi_interception,
4792 [SVM_EXIT_AVIC_UNACCELERATED_ACCESS] = avic_unaccelerated_access_interception,
4795 static void dump_vmcb(struct kvm_vcpu *vcpu)
4797 struct vcpu_svm *svm = to_svm(vcpu);
4798 struct vmcb_control_area *control = &svm->vmcb->control;
4799 struct vmcb_save_area *save = &svm->vmcb->save;
4801 if (!dump_invalid_vmcb) {
4802 pr_warn_ratelimited("set kvm_amd.dump_invalid_vmcb=1 to dump internal KVM state.\n");
4806 pr_err("VMCB Control Area:\n");
4807 pr_err("%-20s%04x\n", "cr_read:", control->intercept_cr & 0xffff);
4808 pr_err("%-20s%04x\n", "cr_write:", control->intercept_cr >> 16);
4809 pr_err("%-20s%04x\n", "dr_read:", control->intercept_dr & 0xffff);
4810 pr_err("%-20s%04x\n", "dr_write:", control->intercept_dr >> 16);
4811 pr_err("%-20s%08x\n", "exceptions:", control->intercept_exceptions);
4812 pr_err("%-20s%016llx\n", "intercepts:", control->intercept);
4813 pr_err("%-20s%d\n", "pause filter count:", control->pause_filter_count);
4814 pr_err("%-20s%d\n", "pause filter threshold:",
4815 control->pause_filter_thresh);
4816 pr_err("%-20s%016llx\n", "iopm_base_pa:", control->iopm_base_pa);
4817 pr_err("%-20s%016llx\n", "msrpm_base_pa:", control->msrpm_base_pa);
4818 pr_err("%-20s%016llx\n", "tsc_offset:", control->tsc_offset);
4819 pr_err("%-20s%d\n", "asid:", control->asid);
4820 pr_err("%-20s%d\n", "tlb_ctl:", control->tlb_ctl);
4821 pr_err("%-20s%08x\n", "int_ctl:", control->int_ctl);
4822 pr_err("%-20s%08x\n", "int_vector:", control->int_vector);
4823 pr_err("%-20s%08x\n", "int_state:", control->int_state);
4824 pr_err("%-20s%08x\n", "exit_code:", control->exit_code);
4825 pr_err("%-20s%016llx\n", "exit_info1:", control->exit_info_1);
4826 pr_err("%-20s%016llx\n", "exit_info2:", control->exit_info_2);
4827 pr_err("%-20s%08x\n", "exit_int_info:", control->exit_int_info);
4828 pr_err("%-20s%08x\n", "exit_int_info_err:", control->exit_int_info_err);
4829 pr_err("%-20s%lld\n", "nested_ctl:", control->nested_ctl);
4830 pr_err("%-20s%016llx\n", "nested_cr3:", control->nested_cr3);
4831 pr_err("%-20s%016llx\n", "avic_vapic_bar:", control->avic_vapic_bar);
4832 pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
4833 pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
4834 pr_err("%-20s%lld\n", "virt_ext:", control->virt_ext);
4835 pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
4836 pr_err("%-20s%016llx\n", "avic_backing_page:", control->avic_backing_page);
4837 pr_err("%-20s%016llx\n", "avic_logical_id:", control->avic_logical_id);
4838 pr_err("%-20s%016llx\n", "avic_physical_id:", control->avic_physical_id);
4839 pr_err("VMCB State Save Area:\n");
4840 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4842 save->es.selector, save->es.attrib,
4843 save->es.limit, save->es.base);
4844 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4846 save->cs.selector, save->cs.attrib,
4847 save->cs.limit, save->cs.base);
4848 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4850 save->ss.selector, save->ss.attrib,
4851 save->ss.limit, save->ss.base);
4852 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4854 save->ds.selector, save->ds.attrib,
4855 save->ds.limit, save->ds.base);
4856 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4858 save->fs.selector, save->fs.attrib,
4859 save->fs.limit, save->fs.base);
4860 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4862 save->gs.selector, save->gs.attrib,
4863 save->gs.limit, save->gs.base);
4864 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4866 save->gdtr.selector, save->gdtr.attrib,
4867 save->gdtr.limit, save->gdtr.base);
4868 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4870 save->ldtr.selector, save->ldtr.attrib,
4871 save->ldtr.limit, save->ldtr.base);
4872 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4874 save->idtr.selector, save->idtr.attrib,
4875 save->idtr.limit, save->idtr.base);
4876 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4878 save->tr.selector, save->tr.attrib,
4879 save->tr.limit, save->tr.base);
4880 pr_err("cpl: %d efer: %016llx\n",
4881 save->cpl, save->efer);
4882 pr_err("%-15s %016llx %-13s %016llx\n",
4883 "cr0:", save->cr0, "cr2:", save->cr2);
4884 pr_err("%-15s %016llx %-13s %016llx\n",
4885 "cr3:", save->cr3, "cr4:", save->cr4);
4886 pr_err("%-15s %016llx %-13s %016llx\n",
4887 "dr6:", save->dr6, "dr7:", save->dr7);
4888 pr_err("%-15s %016llx %-13s %016llx\n",
4889 "rip:", save->rip, "rflags:", save->rflags);
4890 pr_err("%-15s %016llx %-13s %016llx\n",
4891 "rsp:", save->rsp, "rax:", save->rax);
4892 pr_err("%-15s %016llx %-13s %016llx\n",
4893 "star:", save->star, "lstar:", save->lstar);
4894 pr_err("%-15s %016llx %-13s %016llx\n",
4895 "cstar:", save->cstar, "sfmask:", save->sfmask);
4896 pr_err("%-15s %016llx %-13s %016llx\n",
4897 "kernel_gs_base:", save->kernel_gs_base,
4898 "sysenter_cs:", save->sysenter_cs);
4899 pr_err("%-15s %016llx %-13s %016llx\n",
4900 "sysenter_esp:", save->sysenter_esp,
4901 "sysenter_eip:", save->sysenter_eip);
4902 pr_err("%-15s %016llx %-13s %016llx\n",
4903 "gpat:", save->g_pat, "dbgctl:", save->dbgctl);
4904 pr_err("%-15s %016llx %-13s %016llx\n",
4905 "br_from:", save->br_from, "br_to:", save->br_to);
4906 pr_err("%-15s %016llx %-13s %016llx\n",
4907 "excp_from:", save->last_excp_from,
4908 "excp_to:", save->last_excp_to);
4911 static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
4913 struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control;
4915 *info1 = control->exit_info_1;
4916 *info2 = control->exit_info_2;
4919 static int handle_exit(struct kvm_vcpu *vcpu)
4921 struct vcpu_svm *svm = to_svm(vcpu);
4922 struct kvm_run *kvm_run = vcpu->run;
4923 u32 exit_code = svm->vmcb->control.exit_code;
4925 trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM);
4927 if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
4928 vcpu->arch.cr0 = svm->vmcb->save.cr0;
4930 vcpu->arch.cr3 = svm->vmcb->save.cr3;
4932 if (unlikely(svm->nested.exit_required)) {
4933 nested_svm_vmexit(svm);
4934 svm->nested.exit_required = false;
4939 if (is_guest_mode(vcpu)) {
4942 trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code,
4943 svm->vmcb->control.exit_info_1,
4944 svm->vmcb->control.exit_info_2,
4945 svm->vmcb->control.exit_int_info,
4946 svm->vmcb->control.exit_int_info_err,
4949 vmexit = nested_svm_exit_special(svm);
4951 if (vmexit == NESTED_EXIT_CONTINUE)
4952 vmexit = nested_svm_exit_handled(svm);
4954 if (vmexit == NESTED_EXIT_DONE)
4958 svm_complete_interrupts(svm);
4960 if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
4961 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
4962 kvm_run->fail_entry.hardware_entry_failure_reason
4963 = svm->vmcb->control.exit_code;
4968 if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
4969 exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
4970 exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
4971 exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
4972 printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
4974 __func__, svm->vmcb->control.exit_int_info,
4977 if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
4978 || !svm_exit_handlers[exit_code]) {
4979 vcpu_unimpl(vcpu, "svm: unexpected exit reason 0x%x\n", exit_code);
4981 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
4982 vcpu->run->internal.suberror =
4983 KVM_INTERNAL_ERROR_UNEXPECTED_EXIT_REASON;
4984 vcpu->run->internal.ndata = 1;
4985 vcpu->run->internal.data[0] = exit_code;
4989 return svm_exit_handlers[exit_code](svm);
4992 static void reload_tss(struct kvm_vcpu *vcpu)
4994 int cpu = raw_smp_processor_id();
4996 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
4997 sd->tss_desc->type = 9; /* available 32/64-bit TSS */
5001 static void pre_sev_run(struct vcpu_svm *svm, int cpu)
5003 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
5004 int asid = sev_get_asid(svm->vcpu.kvm);
5006 /* Assign the asid allocated with this SEV guest */
5007 svm->vmcb->control.asid = asid;
5012 * 1) when different VMCB for the same ASID is to be run on the same host CPU.
5013 * 2) or this VMCB was executed on different host CPU in previous VMRUNs.
5015 if (sd->sev_vmcbs[asid] == svm->vmcb &&
5016 svm->last_cpu == cpu)
5019 svm->last_cpu = cpu;
5020 sd->sev_vmcbs[asid] = svm->vmcb;
5021 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
5022 mark_dirty(svm->vmcb, VMCB_ASID);
5025 static void pre_svm_run(struct vcpu_svm *svm)
5027 int cpu = raw_smp_processor_id();
5029 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
5031 if (sev_guest(svm->vcpu.kvm))
5032 return pre_sev_run(svm, cpu);
5034 /* FIXME: handle wraparound of asid_generation */
5035 if (svm->asid_generation != sd->asid_generation)
5039 static void svm_inject_nmi(struct kvm_vcpu *vcpu)
5041 struct vcpu_svm *svm = to_svm(vcpu);
5043 svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI;
5044 vcpu->arch.hflags |= HF_NMI_MASK;
5045 set_intercept(svm, INTERCEPT_IRET);
5046 ++vcpu->stat.nmi_injections;
5049 static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
5051 struct vmcb_control_area *control;
5053 /* The following fields are ignored when AVIC is enabled */
5054 control = &svm->vmcb->control;
5055 control->int_vector = irq;
5056 control->int_ctl &= ~V_INTR_PRIO_MASK;
5057 control->int_ctl |= V_IRQ_MASK |
5058 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
5059 mark_dirty(svm->vmcb, VMCB_INTR);
5062 static void svm_set_irq(struct kvm_vcpu *vcpu)
5064 struct vcpu_svm *svm = to_svm(vcpu);
5066 BUG_ON(!(gif_set(svm)));
5068 trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
5069 ++vcpu->stat.irq_injections;
5071 svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
5072 SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
5075 static inline bool svm_nested_virtualize_tpr(struct kvm_vcpu *vcpu)
5077 return is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK);
5080 static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
5082 struct vcpu_svm *svm = to_svm(vcpu);
5084 if (svm_nested_virtualize_tpr(vcpu) ||
5085 kvm_vcpu_apicv_active(vcpu))
5088 clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
5094 set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
5097 static void svm_set_virtual_apic_mode(struct kvm_vcpu *vcpu)
5102 static bool svm_get_enable_apicv(struct kvm_vcpu *vcpu)
5104 return avic && irqchip_split(vcpu->kvm);
5107 static void svm_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
5111 static void svm_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr)
5115 /* Note: Currently only used by Hyper-V. */
5116 static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
5118 struct vcpu_svm *svm = to_svm(vcpu);
5119 struct vmcb *vmcb = svm->vmcb;
5121 if (kvm_vcpu_apicv_active(vcpu))
5122 vmcb->control.int_ctl |= AVIC_ENABLE_MASK;
5124 vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK;
5125 mark_dirty(vmcb, VMCB_AVIC);
5128 static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
5133 static void svm_deliver_avic_intr(struct kvm_vcpu *vcpu, int vec)
5135 kvm_lapic_set_irr(vec, vcpu->arch.apic);
5136 smp_mb__after_atomic();
5138 if (avic_vcpu_is_running(vcpu)) {
5139 int cpuid = vcpu->cpu;
5141 if (cpuid != get_cpu())
5142 wrmsrl(SVM_AVIC_DOORBELL, kvm_cpu_get_apicid(cpuid));
5145 kvm_vcpu_wake_up(vcpu);
5148 static bool svm_dy_apicv_has_pending_interrupt(struct kvm_vcpu *vcpu)
5153 static void svm_ir_list_del(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi)
5155 unsigned long flags;
5156 struct amd_svm_iommu_ir *cur;
5158 spin_lock_irqsave(&svm->ir_list_lock, flags);
5159 list_for_each_entry(cur, &svm->ir_list, node) {
5160 if (cur->data != pi->ir_data)
5162 list_del(&cur->node);
5166 spin_unlock_irqrestore(&svm->ir_list_lock, flags);
5169 static int svm_ir_list_add(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi)
5172 unsigned long flags;
5173 struct amd_svm_iommu_ir *ir;
5176 * In some cases, the existing irte is updaed and re-set,
5177 * so we need to check here if it's already been * added
5180 if (pi->ir_data && (pi->prev_ga_tag != 0)) {
5181 struct kvm *kvm = svm->vcpu.kvm;
5182 u32 vcpu_id = AVIC_GATAG_TO_VCPUID(pi->prev_ga_tag);
5183 struct kvm_vcpu *prev_vcpu = kvm_get_vcpu_by_id(kvm, vcpu_id);
5184 struct vcpu_svm *prev_svm;
5191 prev_svm = to_svm(prev_vcpu);
5192 svm_ir_list_del(prev_svm, pi);
5196 * Allocating new amd_iommu_pi_data, which will get
5197 * add to the per-vcpu ir_list.
5199 ir = kzalloc(sizeof(struct amd_svm_iommu_ir), GFP_KERNEL_ACCOUNT);
5204 ir->data = pi->ir_data;
5206 spin_lock_irqsave(&svm->ir_list_lock, flags);
5207 list_add(&ir->node, &svm->ir_list);
5208 spin_unlock_irqrestore(&svm->ir_list_lock, flags);
5215 * The HW cannot support posting multicast/broadcast
5216 * interrupts to a vCPU. So, we still use legacy interrupt
5217 * remapping for these kind of interrupts.
5219 * For lowest-priority interrupts, we only support
5220 * those with single CPU as the destination, e.g. user
5221 * configures the interrupts via /proc/irq or uses
5222 * irqbalance to make the interrupts single-CPU.
5225 get_pi_vcpu_info(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e,
5226 struct vcpu_data *vcpu_info, struct vcpu_svm **svm)
5228 struct kvm_lapic_irq irq;
5229 struct kvm_vcpu *vcpu = NULL;
5231 kvm_set_msi_irq(kvm, e, &irq);
5233 if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu) ||
5234 !kvm_irq_is_postable(&irq)) {
5235 pr_debug("SVM: %s: use legacy intr remap mode for irq %u\n",
5236 __func__, irq.vector);
5240 pr_debug("SVM: %s: use GA mode for irq %u\n", __func__,
5242 *svm = to_svm(vcpu);
5243 vcpu_info->pi_desc_addr = __sme_set(page_to_phys((*svm)->avic_backing_page));
5244 vcpu_info->vector = irq.vector;
5250 * svm_update_pi_irte - set IRTE for Posted-Interrupts
5253 * @host_irq: host irq of the interrupt
5254 * @guest_irq: gsi of the interrupt
5255 * @set: set or unset PI
5256 * returns 0 on success, < 0 on failure
5258 static int svm_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
5259 uint32_t guest_irq, bool set)
5261 struct kvm_kernel_irq_routing_entry *e;
5262 struct kvm_irq_routing_table *irq_rt;
5263 int idx, ret = -EINVAL;
5265 if (!kvm_arch_has_assigned_device(kvm) ||
5266 !irq_remapping_cap(IRQ_POSTING_CAP))
5269 pr_debug("SVM: %s: host_irq=%#x, guest_irq=%#x, set=%#x\n",
5270 __func__, host_irq, guest_irq, set);
5272 idx = srcu_read_lock(&kvm->irq_srcu);
5273 irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu);
5274 WARN_ON(guest_irq >= irq_rt->nr_rt_entries);
5276 hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) {
5277 struct vcpu_data vcpu_info;
5278 struct vcpu_svm *svm = NULL;
5280 if (e->type != KVM_IRQ_ROUTING_MSI)
5284 * Here, we setup with legacy mode in the following cases:
5285 * 1. When cannot target interrupt to a specific vcpu.
5286 * 2. Unsetting posted interrupt.
5287 * 3. APIC virtialization is disabled for the vcpu.
5288 * 4. IRQ has incompatible delivery mode (SMI, INIT, etc)
5290 if (!get_pi_vcpu_info(kvm, e, &vcpu_info, &svm) && set &&
5291 kvm_vcpu_apicv_active(&svm->vcpu)) {
5292 struct amd_iommu_pi_data pi;
5294 /* Try to enable guest_mode in IRTE */
5295 pi.base = __sme_set(page_to_phys(svm->avic_backing_page) &
5297 pi.ga_tag = AVIC_GATAG(to_kvm_svm(kvm)->avic_vm_id,
5299 pi.is_guest_mode = true;
5300 pi.vcpu_data = &vcpu_info;
5301 ret = irq_set_vcpu_affinity(host_irq, &pi);
5304 * Here, we successfully setting up vcpu affinity in
5305 * IOMMU guest mode. Now, we need to store the posted
5306 * interrupt information in a per-vcpu ir_list so that
5307 * we can reference to them directly when we update vcpu
5308 * scheduling information in IOMMU irte.
5310 if (!ret && pi.is_guest_mode)
5311 svm_ir_list_add(svm, &pi);
5313 /* Use legacy mode in IRTE */
5314 struct amd_iommu_pi_data pi;
5317 * Here, pi is used to:
5318 * - Tell IOMMU to use legacy mode for this interrupt.
5319 * - Retrieve ga_tag of prior interrupt remapping data.
5321 pi.is_guest_mode = false;
5322 ret = irq_set_vcpu_affinity(host_irq, &pi);
5325 * Check if the posted interrupt was previously
5326 * setup with the guest_mode by checking if the ga_tag
5327 * was cached. If so, we need to clean up the per-vcpu
5330 if (!ret && pi.prev_ga_tag) {
5331 int id = AVIC_GATAG_TO_VCPUID(pi.prev_ga_tag);
5332 struct kvm_vcpu *vcpu;
5334 vcpu = kvm_get_vcpu_by_id(kvm, id);
5336 svm_ir_list_del(to_svm(vcpu), &pi);
5341 trace_kvm_pi_irte_update(host_irq, svm->vcpu.vcpu_id,
5342 e->gsi, vcpu_info.vector,
5343 vcpu_info.pi_desc_addr, set);
5347 pr_err("%s: failed to update PI IRTE\n", __func__);
5354 srcu_read_unlock(&kvm->irq_srcu, idx);
5358 static int svm_nmi_allowed(struct kvm_vcpu *vcpu)
5360 struct vcpu_svm *svm = to_svm(vcpu);
5361 struct vmcb *vmcb = svm->vmcb;
5363 ret = !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
5364 !(svm->vcpu.arch.hflags & HF_NMI_MASK);
5365 ret = ret && gif_set(svm) && nested_svm_nmi(svm);
5370 static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu)
5372 struct vcpu_svm *svm = to_svm(vcpu);
5374 return !!(svm->vcpu.arch.hflags & HF_NMI_MASK);
5377 static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
5379 struct vcpu_svm *svm = to_svm(vcpu);
5382 svm->vcpu.arch.hflags |= HF_NMI_MASK;
5383 set_intercept(svm, INTERCEPT_IRET);
5385 svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
5386 clr_intercept(svm, INTERCEPT_IRET);
5390 static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
5392 struct vcpu_svm *svm = to_svm(vcpu);
5393 struct vmcb *vmcb = svm->vmcb;
5396 if (!gif_set(svm) ||
5397 (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK))
5400 ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
5402 if (is_guest_mode(vcpu))
5403 return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);
5408 static void enable_irq_window(struct kvm_vcpu *vcpu)
5410 struct vcpu_svm *svm = to_svm(vcpu);
5412 if (kvm_vcpu_apicv_active(vcpu))
5416 * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes
5417 * 1, because that's a separate STGI/VMRUN intercept. The next time we
5418 * get that intercept, this function will be called again though and
5419 * we'll get the vintr intercept. However, if the vGIF feature is
5420 * enabled, the STGI interception will not occur. Enable the irq
5421 * window under the assumption that the hardware will set the GIF.
5423 if ((vgif_enabled(svm) || gif_set(svm)) && nested_svm_intr(svm)) {
5425 svm_inject_irq(svm, 0x0);
5429 static void enable_nmi_window(struct kvm_vcpu *vcpu)
5431 struct vcpu_svm *svm = to_svm(vcpu);
5433 if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
5435 return; /* IRET will cause a vm exit */
5437 if (!gif_set(svm)) {
5438 if (vgif_enabled(svm))
5439 set_intercept(svm, INTERCEPT_STGI);
5440 return; /* STGI will cause a vm exit */
5443 if (svm->nested.exit_required)
5444 return; /* we're not going to run the guest yet */
5447 * Something prevents NMI from been injected. Single step over possible
5448 * problem (IRET or exception injection or interrupt shadow)
5450 svm->nmi_singlestep_guest_rflags = svm_get_rflags(vcpu);
5451 svm->nmi_singlestep = true;
5452 svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
5455 static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
5460 static int svm_set_identity_map_addr(struct kvm *kvm, u64 ident_addr)
5465 static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
5467 struct vcpu_svm *svm = to_svm(vcpu);
5469 if (static_cpu_has(X86_FEATURE_FLUSHBYASID))
5470 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
5472 svm->asid_generation--;
5475 static void svm_flush_tlb_gva(struct kvm_vcpu *vcpu, gva_t gva)
5477 struct vcpu_svm *svm = to_svm(vcpu);
5479 invlpga(gva, svm->vmcb->control.asid);
5482 static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
5486 static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
5488 struct vcpu_svm *svm = to_svm(vcpu);
5490 if (svm_nested_virtualize_tpr(vcpu))
5493 if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
5494 int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
5495 kvm_set_cr8(vcpu, cr8);
5499 static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
5501 struct vcpu_svm *svm = to_svm(vcpu);
5504 if (svm_nested_virtualize_tpr(vcpu) ||
5505 kvm_vcpu_apicv_active(vcpu))
5508 cr8 = kvm_get_cr8(vcpu);
5509 svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
5510 svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
5513 static void svm_complete_interrupts(struct vcpu_svm *svm)
5517 u32 exitintinfo = svm->vmcb->control.exit_int_info;
5518 unsigned int3_injected = svm->int3_injected;
5520 svm->int3_injected = 0;
5523 * If we've made progress since setting HF_IRET_MASK, we've
5524 * executed an IRET and can allow NMI injection.
5526 if ((svm->vcpu.arch.hflags & HF_IRET_MASK)
5527 && kvm_rip_read(&svm->vcpu) != svm->nmi_iret_rip) {
5528 svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
5529 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
5532 svm->vcpu.arch.nmi_injected = false;
5533 kvm_clear_exception_queue(&svm->vcpu);
5534 kvm_clear_interrupt_queue(&svm->vcpu);
5536 if (!(exitintinfo & SVM_EXITINTINFO_VALID))
5539 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
5541 vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK;
5542 type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK;
5545 case SVM_EXITINTINFO_TYPE_NMI:
5546 svm->vcpu.arch.nmi_injected = true;
5548 case SVM_EXITINTINFO_TYPE_EXEPT:
5550 * In case of software exceptions, do not reinject the vector,
5551 * but re-execute the instruction instead. Rewind RIP first
5552 * if we emulated INT3 before.
5554 if (kvm_exception_is_soft(vector)) {
5555 if (vector == BP_VECTOR && int3_injected &&
5556 kvm_is_linear_rip(&svm->vcpu, svm->int3_rip))
5557 kvm_rip_write(&svm->vcpu,
5558 kvm_rip_read(&svm->vcpu) -
5562 if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
5563 u32 err = svm->vmcb->control.exit_int_info_err;
5564 kvm_requeue_exception_e(&svm->vcpu, vector, err);
5567 kvm_requeue_exception(&svm->vcpu, vector);
5569 case SVM_EXITINTINFO_TYPE_INTR:
5570 kvm_queue_interrupt(&svm->vcpu, vector, false);
5577 static void svm_cancel_injection(struct kvm_vcpu *vcpu)
5579 struct vcpu_svm *svm = to_svm(vcpu);
5580 struct vmcb_control_area *control = &svm->vmcb->control;
5582 control->exit_int_info = control->event_inj;
5583 control->exit_int_info_err = control->event_inj_err;
5584 control->event_inj = 0;
5585 svm_complete_interrupts(svm);
5588 static void svm_vcpu_run(struct kvm_vcpu *vcpu)
5590 struct vcpu_svm *svm = to_svm(vcpu);
5592 svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
5593 svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
5594 svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];
5597 * A vmexit emulation is required before the vcpu can be executed
5600 if (unlikely(svm->nested.exit_required))
5604 * Disable singlestep if we're injecting an interrupt/exception.
5605 * We don't want our modified rflags to be pushed on the stack where
5606 * we might not be able to easily reset them if we disabled NMI
5609 if (svm->nmi_singlestep && svm->vmcb->control.event_inj) {
5611 * Event injection happens before external interrupts cause a
5612 * vmexit and interrupts are disabled here, so smp_send_reschedule
5613 * is enough to force an immediate vmexit.
5615 disable_nmi_singlestep(svm);
5616 smp_send_reschedule(vcpu->cpu);
5621 sync_lapic_to_cr8(vcpu);
5623 svm->vmcb->save.cr2 = vcpu->arch.cr2;
5626 kvm_load_guest_xcr0(vcpu);
5628 if (lapic_in_kernel(vcpu) &&
5629 vcpu->arch.apic->lapic_timer.timer_advance_ns)
5630 kvm_wait_lapic_expire(vcpu);
5633 * If this vCPU has touched SPEC_CTRL, restore the guest's value if
5634 * it's non-zero. Since vmentry is serialising on affected CPUs, there
5635 * is no need to worry about the conditional branch over the wrmsr
5636 * being speculatively taken.
5638 x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl);
5643 "push %%" _ASM_BP "; \n\t"
5644 "mov %c[rbx](%[svm]), %%" _ASM_BX " \n\t"
5645 "mov %c[rcx](%[svm]), %%" _ASM_CX " \n\t"
5646 "mov %c[rdx](%[svm]), %%" _ASM_DX " \n\t"
5647 "mov %c[rsi](%[svm]), %%" _ASM_SI " \n\t"
5648 "mov %c[rdi](%[svm]), %%" _ASM_DI " \n\t"
5649 "mov %c[rbp](%[svm]), %%" _ASM_BP " \n\t"
5650 #ifdef CONFIG_X86_64
5651 "mov %c[r8](%[svm]), %%r8 \n\t"
5652 "mov %c[r9](%[svm]), %%r9 \n\t"
5653 "mov %c[r10](%[svm]), %%r10 \n\t"
5654 "mov %c[r11](%[svm]), %%r11 \n\t"
5655 "mov %c[r12](%[svm]), %%r12 \n\t"
5656 "mov %c[r13](%[svm]), %%r13 \n\t"
5657 "mov %c[r14](%[svm]), %%r14 \n\t"
5658 "mov %c[r15](%[svm]), %%r15 \n\t"
5661 /* Enter guest mode */
5662 "push %%" _ASM_AX " \n\t"
5663 "mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
5664 __ex("vmload %%" _ASM_AX) "\n\t"
5665 __ex("vmrun %%" _ASM_AX) "\n\t"
5666 __ex("vmsave %%" _ASM_AX) "\n\t"
5667 "pop %%" _ASM_AX " \n\t"
5669 /* Save guest registers, load host registers */
5670 "mov %%" _ASM_BX ", %c[rbx](%[svm]) \n\t"
5671 "mov %%" _ASM_CX ", %c[rcx](%[svm]) \n\t"
5672 "mov %%" _ASM_DX ", %c[rdx](%[svm]) \n\t"
5673 "mov %%" _ASM_SI ", %c[rsi](%[svm]) \n\t"
5674 "mov %%" _ASM_DI ", %c[rdi](%[svm]) \n\t"
5675 "mov %%" _ASM_BP ", %c[rbp](%[svm]) \n\t"
5676 #ifdef CONFIG_X86_64
5677 "mov %%r8, %c[r8](%[svm]) \n\t"
5678 "mov %%r9, %c[r9](%[svm]) \n\t"
5679 "mov %%r10, %c[r10](%[svm]) \n\t"
5680 "mov %%r11, %c[r11](%[svm]) \n\t"
5681 "mov %%r12, %c[r12](%[svm]) \n\t"
5682 "mov %%r13, %c[r13](%[svm]) \n\t"
5683 "mov %%r14, %c[r14](%[svm]) \n\t"
5684 "mov %%r15, %c[r15](%[svm]) \n\t"
5686 * Clear host registers marked as clobbered to prevent
5689 "xor %%r8d, %%r8d \n\t"
5690 "xor %%r9d, %%r9d \n\t"
5691 "xor %%r10d, %%r10d \n\t"
5692 "xor %%r11d, %%r11d \n\t"
5693 "xor %%r12d, %%r12d \n\t"
5694 "xor %%r13d, %%r13d \n\t"
5695 "xor %%r14d, %%r14d \n\t"
5696 "xor %%r15d, %%r15d \n\t"
5698 "xor %%ebx, %%ebx \n\t"
5699 "xor %%ecx, %%ecx \n\t"
5700 "xor %%edx, %%edx \n\t"
5701 "xor %%esi, %%esi \n\t"
5702 "xor %%edi, %%edi \n\t"
5706 [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
5707 [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])),
5708 [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])),
5709 [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])),
5710 [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])),
5711 [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])),
5712 [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP]))
5713 #ifdef CONFIG_X86_64
5714 , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])),
5715 [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])),
5716 [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])),
5717 [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])),
5718 [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])),
5719 [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])),
5720 [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])),
5721 [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15]))
5724 #ifdef CONFIG_X86_64
5725 , "rbx", "rcx", "rdx", "rsi", "rdi"
5726 , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
5728 , "ebx", "ecx", "edx", "esi", "edi"
5732 /* Eliminate branch target predictions from guest mode */
5735 #ifdef CONFIG_X86_64
5736 wrmsrl(MSR_GS_BASE, svm->host.gs_base);
5738 loadsegment(fs, svm->host.fs);
5739 #ifndef CONFIG_X86_32_LAZY_GS
5740 loadsegment(gs, svm->host.gs);
5745 * We do not use IBRS in the kernel. If this vCPU has used the
5746 * SPEC_CTRL MSR it may have left it on; save the value and
5747 * turn it off. This is much more efficient than blindly adding
5748 * it to the atomic save/restore list. Especially as the former
5749 * (Saving guest MSRs on vmexit) doesn't even exist in KVM.
5751 * For non-nested case:
5752 * If the L01 MSR bitmap does not intercept the MSR, then we need to
5756 * If the L02 MSR bitmap does not intercept the MSR, then we need to
5759 if (unlikely(!msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL)))
5760 svm->spec_ctrl = native_read_msr(MSR_IA32_SPEC_CTRL);
5764 local_irq_disable();
5766 x86_spec_ctrl_restore_host(svm->spec_ctrl, svm->virt_spec_ctrl);
5768 vcpu->arch.cr2 = svm->vmcb->save.cr2;
5769 vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
5770 vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
5771 vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
5773 if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5774 kvm_before_interrupt(&svm->vcpu);
5776 kvm_put_guest_xcr0(vcpu);
5779 /* Any pending NMI will happen here */
5781 if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5782 kvm_after_interrupt(&svm->vcpu);
5784 sync_cr8_to_lapic(vcpu);
5788 svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
5790 /* if exit due to PF check for async PF */
5791 if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
5792 svm->vcpu.arch.apf.host_apf_reason = kvm_read_and_reset_pf_reason();
5795 vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
5796 vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
5800 * We need to handle MC intercepts here before the vcpu has a chance to
5801 * change the physical cpu
5803 if (unlikely(svm->vmcb->control.exit_code ==
5804 SVM_EXIT_EXCP_BASE + MC_VECTOR))
5805 svm_handle_mce(svm);
5807 mark_all_clean(svm->vmcb);
5809 STACK_FRAME_NON_STANDARD(svm_vcpu_run);
5811 static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
5813 struct vcpu_svm *svm = to_svm(vcpu);
5815 svm->vmcb->save.cr3 = __sme_set(root);
5816 mark_dirty(svm->vmcb, VMCB_CR);
5819 static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
5821 struct vcpu_svm *svm = to_svm(vcpu);
5823 svm->vmcb->control.nested_cr3 = __sme_set(root);
5824 mark_dirty(svm->vmcb, VMCB_NPT);
5826 /* Also sync guest cr3 here in case we live migrate */
5827 svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
5828 mark_dirty(svm->vmcb, VMCB_CR);
5831 static int is_disabled(void)
5835 rdmsrl(MSR_VM_CR, vm_cr);
5836 if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
5843 svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
5846 * Patch in the VMMCALL instruction:
5848 hypercall[0] = 0x0f;
5849 hypercall[1] = 0x01;
5850 hypercall[2] = 0xd9;
5853 static int __init svm_check_processor_compat(void)
5858 static bool svm_cpu_has_accelerated_tpr(void)
5863 static bool svm_has_emulated_msr(int index)
5866 case MSR_IA32_MCG_EXT_CTL:
5867 case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC:
5876 static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
5881 static void svm_cpuid_update(struct kvm_vcpu *vcpu)
5883 struct vcpu_svm *svm = to_svm(vcpu);
5885 /* Update nrips enabled cache */
5886 svm->nrips_enabled = !!guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS);
5888 if (!kvm_vcpu_apicv_active(vcpu))
5891 guest_cpuid_clear(vcpu, X86_FEATURE_X2APIC);
5894 #define F(x) bit(X86_FEATURE_##x)
5896 static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
5901 entry->ecx &= ~bit(X86_FEATURE_X2APIC);
5905 entry->ecx |= (1 << 2); /* Set SVM bit */
5908 if (boot_cpu_has(X86_FEATURE_LS_CFG_SSBD) ||
5909 boot_cpu_has(X86_FEATURE_AMD_SSBD))
5910 entry->ebx |= F(VIRT_SSBD);
5913 entry->eax = 1; /* SVM revision 1 */
5914 entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper
5915 ASID emulation to nested SVM */
5916 entry->ecx = 0; /* Reserved */
5917 entry->edx = 0; /* Per default do not support any
5918 additional features */
5920 /* Support next_rip if host supports it */
5921 if (boot_cpu_has(X86_FEATURE_NRIPS))
5922 entry->edx |= F(NRIPS);
5924 /* Support NPT for the guest if enabled */
5926 entry->edx |= F(NPT);
5930 /* Support memory encryption cpuid if host supports it */
5931 if (boot_cpu_has(X86_FEATURE_SEV))
5932 cpuid(0x8000001f, &entry->eax, &entry->ebx,
5933 &entry->ecx, &entry->edx);
5938 static int svm_get_lpage_level(void)
5940 return PT_PDPE_LEVEL;
5943 static bool svm_rdtscp_supported(void)
5945 return boot_cpu_has(X86_FEATURE_RDTSCP);
5948 static bool svm_invpcid_supported(void)
5953 static bool svm_mpx_supported(void)
5958 static bool svm_xsaves_supported(void)
5963 static bool svm_umip_emulated(void)
5968 static bool svm_pt_supported(void)
5973 static bool svm_has_wbinvd_exit(void)
5978 #define PRE_EX(exit) { .exit_code = (exit), \
5979 .stage = X86_ICPT_PRE_EXCEPT, }
5980 #define POST_EX(exit) { .exit_code = (exit), \
5981 .stage = X86_ICPT_POST_EXCEPT, }
5982 #define POST_MEM(exit) { .exit_code = (exit), \
5983 .stage = X86_ICPT_POST_MEMACCESS, }
5985 static const struct __x86_intercept {
5987 enum x86_intercept_stage stage;
5988 } x86_intercept_map[] = {
5989 [x86_intercept_cr_read] = POST_EX(SVM_EXIT_READ_CR0),
5990 [x86_intercept_cr_write] = POST_EX(SVM_EXIT_WRITE_CR0),
5991 [x86_intercept_clts] = POST_EX(SVM_EXIT_WRITE_CR0),
5992 [x86_intercept_lmsw] = POST_EX(SVM_EXIT_WRITE_CR0),
5993 [x86_intercept_smsw] = POST_EX(SVM_EXIT_READ_CR0),
5994 [x86_intercept_dr_read] = POST_EX(SVM_EXIT_READ_DR0),
5995 [x86_intercept_dr_write] = POST_EX(SVM_EXIT_WRITE_DR0),
5996 [x86_intercept_sldt] = POST_EX(SVM_EXIT_LDTR_READ),
5997 [x86_intercept_str] = POST_EX(SVM_EXIT_TR_READ),
5998 [x86_intercept_lldt] = POST_EX(SVM_EXIT_LDTR_WRITE),
5999 [x86_intercept_ltr] = POST_EX(SVM_EXIT_TR_WRITE),
6000 [x86_intercept_sgdt] = POST_EX(SVM_EXIT_GDTR_READ),
6001 [x86_intercept_sidt] = POST_EX(SVM_EXIT_IDTR_READ),
6002 [x86_intercept_lgdt] = POST_EX(SVM_EXIT_GDTR_WRITE),
6003 [x86_intercept_lidt] = POST_EX(SVM_EXIT_IDTR_WRITE),
6004 [x86_intercept_vmrun] = POST_EX(SVM_EXIT_VMRUN),
6005 [x86_intercept_vmmcall] = POST_EX(SVM_EXIT_VMMCALL),
6006 [x86_intercept_vmload] = POST_EX(SVM_EXIT_VMLOAD),
6007 [x86_intercept_vmsave] = POST_EX(SVM_EXIT_VMSAVE),
6008 [x86_intercept_stgi] = POST_EX(SVM_EXIT_STGI),
6009 [x86_intercept_clgi] = POST_EX(SVM_EXIT_CLGI),
6010 [x86_intercept_skinit] = POST_EX(SVM_EXIT_SKINIT),
6011 [x86_intercept_invlpga] = POST_EX(SVM_EXIT_INVLPGA),
6012 [x86_intercept_rdtscp] = POST_EX(SVM_EXIT_RDTSCP),
6013 [x86_intercept_monitor] = POST_MEM(SVM_EXIT_MONITOR),
6014 [x86_intercept_mwait] = POST_EX(SVM_EXIT_MWAIT),
6015 [x86_intercept_invlpg] = POST_EX(SVM_EXIT_INVLPG),
6016 [x86_intercept_invd] = POST_EX(SVM_EXIT_INVD),
6017 [x86_intercept_wbinvd] = POST_EX(SVM_EXIT_WBINVD),
6018 [x86_intercept_wrmsr] = POST_EX(SVM_EXIT_MSR),
6019 [x86_intercept_rdtsc] = POST_EX(SVM_EXIT_RDTSC),
6020 [x86_intercept_rdmsr] = POST_EX(SVM_EXIT_MSR),
6021 [x86_intercept_rdpmc] = POST_EX(SVM_EXIT_RDPMC),
6022 [x86_intercept_cpuid] = PRE_EX(SVM_EXIT_CPUID),
6023 [x86_intercept_rsm] = PRE_EX(SVM_EXIT_RSM),
6024 [x86_intercept_pause] = PRE_EX(SVM_EXIT_PAUSE),
6025 [x86_intercept_pushf] = PRE_EX(SVM_EXIT_PUSHF),
6026 [x86_intercept_popf] = PRE_EX(SVM_EXIT_POPF),
6027 [x86_intercept_intn] = PRE_EX(SVM_EXIT_SWINT),
6028 [x86_intercept_iret] = PRE_EX(SVM_EXIT_IRET),
6029 [x86_intercept_icebp] = PRE_EX(SVM_EXIT_ICEBP),
6030 [x86_intercept_hlt] = POST_EX(SVM_EXIT_HLT),
6031 [x86_intercept_in] = POST_EX(SVM_EXIT_IOIO),
6032 [x86_intercept_ins] = POST_EX(SVM_EXIT_IOIO),
6033 [x86_intercept_out] = POST_EX(SVM_EXIT_IOIO),
6034 [x86_intercept_outs] = POST_EX(SVM_EXIT_IOIO),
6035 [x86_intercept_xsetbv] = PRE_EX(SVM_EXIT_XSETBV),
6042 static int svm_check_intercept(struct kvm_vcpu *vcpu,
6043 struct x86_instruction_info *info,
6044 enum x86_intercept_stage stage)
6046 struct vcpu_svm *svm = to_svm(vcpu);
6047 int vmexit, ret = X86EMUL_CONTINUE;
6048 struct __x86_intercept icpt_info;
6049 struct vmcb *vmcb = svm->vmcb;
6051 if (info->intercept >= ARRAY_SIZE(x86_intercept_map))
6054 icpt_info = x86_intercept_map[info->intercept];
6056 if (stage != icpt_info.stage)
6059 switch (icpt_info.exit_code) {
6060 case SVM_EXIT_READ_CR0:
6061 if (info->intercept == x86_intercept_cr_read)
6062 icpt_info.exit_code += info->modrm_reg;
6064 case SVM_EXIT_WRITE_CR0: {
6065 unsigned long cr0, val;
6068 if (info->intercept == x86_intercept_cr_write)
6069 icpt_info.exit_code += info->modrm_reg;
6071 if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 ||
6072 info->intercept == x86_intercept_clts)
6075 intercept = svm->nested.intercept;
6077 if (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0)))
6080 cr0 = vcpu->arch.cr0 & ~SVM_CR0_SELECTIVE_MASK;
6081 val = info->src_val & ~SVM_CR0_SELECTIVE_MASK;
6083 if (info->intercept == x86_intercept_lmsw) {
6086 /* lmsw can't clear PE - catch this here */
6087 if (cr0 & X86_CR0_PE)
6092 icpt_info.exit_code = SVM_EXIT_CR0_SEL_WRITE;
6096 case SVM_EXIT_READ_DR0:
6097 case SVM_EXIT_WRITE_DR0:
6098 icpt_info.exit_code += info->modrm_reg;
6101 if (info->intercept == x86_intercept_wrmsr)
6102 vmcb->control.exit_info_1 = 1;
6104 vmcb->control.exit_info_1 = 0;
6106 case SVM_EXIT_PAUSE:
6108 * We get this for NOP only, but pause
6109 * is rep not, check this here
6111 if (info->rep_prefix != REPE_PREFIX)
6114 case SVM_EXIT_IOIO: {
6118 if (info->intercept == x86_intercept_in ||
6119 info->intercept == x86_intercept_ins) {
6120 exit_info = ((info->src_val & 0xffff) << 16) |
6122 bytes = info->dst_bytes;
6124 exit_info = (info->dst_val & 0xffff) << 16;
6125 bytes = info->src_bytes;
6128 if (info->intercept == x86_intercept_outs ||
6129 info->intercept == x86_intercept_ins)
6130 exit_info |= SVM_IOIO_STR_MASK;
6132 if (info->rep_prefix)
6133 exit_info |= SVM_IOIO_REP_MASK;
6135 bytes = min(bytes, 4u);
6137 exit_info |= bytes << SVM_IOIO_SIZE_SHIFT;
6139 exit_info |= (u32)info->ad_bytes << (SVM_IOIO_ASIZE_SHIFT - 1);
6141 vmcb->control.exit_info_1 = exit_info;
6142 vmcb->control.exit_info_2 = info->next_rip;
6150 /* TODO: Advertise NRIPS to guest hypervisor unconditionally */
6151 if (static_cpu_has(X86_FEATURE_NRIPS))
6152 vmcb->control.next_rip = info->next_rip;
6153 vmcb->control.exit_code = icpt_info.exit_code;
6154 vmexit = nested_svm_exit_handled(svm);
6156 ret = (vmexit == NESTED_EXIT_DONE) ? X86EMUL_INTERCEPTED
6163 static void svm_handle_exit_irqoff(struct kvm_vcpu *vcpu)
6168 static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
6170 if (pause_filter_thresh)
6171 shrink_ple_window(vcpu);
6174 static inline void avic_post_state_restore(struct kvm_vcpu *vcpu)
6176 if (avic_handle_apic_id_update(vcpu) != 0)
6178 avic_handle_dfr_update(vcpu);
6179 avic_handle_ldr_update(vcpu);
6182 static void svm_setup_mce(struct kvm_vcpu *vcpu)
6184 /* [63:9] are reserved. */
6185 vcpu->arch.mcg_cap &= 0x1ff;
6188 static int svm_smi_allowed(struct kvm_vcpu *vcpu)
6190 struct vcpu_svm *svm = to_svm(vcpu);
6192 /* Per APM Vol.2 15.22.2 "Response to SMI" */
6196 if (is_guest_mode(&svm->vcpu) &&
6197 svm->nested.intercept & (1ULL << INTERCEPT_SMI)) {
6198 /* TODO: Might need to set exit_info_1 and exit_info_2 here */
6199 svm->vmcb->control.exit_code = SVM_EXIT_SMI;
6200 svm->nested.exit_required = true;
6207 static int svm_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
6209 struct vcpu_svm *svm = to_svm(vcpu);
6212 if (is_guest_mode(vcpu)) {
6213 /* FED8h - SVM Guest */
6214 put_smstate(u64, smstate, 0x7ed8, 1);
6215 /* FEE0h - SVM Guest VMCB Physical Address */
6216 put_smstate(u64, smstate, 0x7ee0, svm->nested.vmcb);
6218 svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
6219 svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
6220 svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];
6222 ret = nested_svm_vmexit(svm);
6229 static int svm_pre_leave_smm(struct kvm_vcpu *vcpu, const char *smstate)
6231 struct vcpu_svm *svm = to_svm(vcpu);
6232 struct vmcb *nested_vmcb;
6233 struct kvm_host_map map;
6237 guest = GET_SMSTATE(u64, smstate, 0x7ed8);
6238 vmcb = GET_SMSTATE(u64, smstate, 0x7ee0);
6241 if (kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(vmcb), &map) == -EINVAL)
6243 nested_vmcb = map.hva;
6244 enter_svm_guest_mode(svm, vmcb, nested_vmcb, &map);
6249 static int enable_smi_window(struct kvm_vcpu *vcpu)
6251 struct vcpu_svm *svm = to_svm(vcpu);
6253 if (!gif_set(svm)) {
6254 if (vgif_enabled(svm))
6255 set_intercept(svm, INTERCEPT_STGI);
6256 /* STGI will cause a vm exit */
6262 static int sev_asid_new(void)
6267 * SEV-enabled guest must use asid from min_sev_asid to max_sev_asid.
6269 pos = find_next_zero_bit(sev_asid_bitmap, max_sev_asid, min_sev_asid - 1);
6270 if (pos >= max_sev_asid)
6273 set_bit(pos, sev_asid_bitmap);
6277 static int sev_guest_init(struct kvm *kvm, struct kvm_sev_cmd *argp)
6279 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6283 if (unlikely(sev->active))
6286 asid = sev_asid_new();
6290 ret = sev_platform_init(&argp->error);
6296 INIT_LIST_HEAD(&sev->regions_list);
6301 __sev_asid_free(asid);
6305 static int sev_bind_asid(struct kvm *kvm, unsigned int handle, int *error)
6307 struct sev_data_activate *data;
6308 int asid = sev_get_asid(kvm);
6311 wbinvd_on_all_cpus();
6313 ret = sev_guest_df_flush(error);
6317 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6321 /* activate ASID on the given handle */
6322 data->handle = handle;
6324 ret = sev_guest_activate(data, error);
6330 static int __sev_issue_cmd(int fd, int id, void *data, int *error)
6339 ret = sev_issue_cmd_external_user(f.file, id, data, error);
6345 static int sev_issue_cmd(struct kvm *kvm, int id, void *data, int *error)
6347 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6349 return __sev_issue_cmd(sev->fd, id, data, error);
6352 static int sev_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp)
6354 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6355 struct sev_data_launch_start *start;
6356 struct kvm_sev_launch_start params;
6357 void *dh_blob, *session_blob;
6358 int *error = &argp->error;
6361 if (!sev_guest(kvm))
6364 if (copy_from_user(¶ms, (void __user *)(uintptr_t)argp->data, sizeof(params)))
6367 start = kzalloc(sizeof(*start), GFP_KERNEL_ACCOUNT);
6372 if (params.dh_uaddr) {
6373 dh_blob = psp_copy_user_blob(params.dh_uaddr, params.dh_len);
6374 if (IS_ERR(dh_blob)) {
6375 ret = PTR_ERR(dh_blob);
6379 start->dh_cert_address = __sme_set(__pa(dh_blob));
6380 start->dh_cert_len = params.dh_len;
6383 session_blob = NULL;
6384 if (params.session_uaddr) {
6385 session_blob = psp_copy_user_blob(params.session_uaddr, params.session_len);
6386 if (IS_ERR(session_blob)) {
6387 ret = PTR_ERR(session_blob);
6391 start->session_address = __sme_set(__pa(session_blob));
6392 start->session_len = params.session_len;
6395 start->handle = params.handle;
6396 start->policy = params.policy;
6398 /* create memory encryption context */
6399 ret = __sev_issue_cmd(argp->sev_fd, SEV_CMD_LAUNCH_START, start, error);
6401 goto e_free_session;
6403 /* Bind ASID to this guest */
6404 ret = sev_bind_asid(kvm, start->handle, error);
6406 goto e_free_session;
6408 /* return handle to userspace */
6409 params.handle = start->handle;
6410 if (copy_to_user((void __user *)(uintptr_t)argp->data, ¶ms, sizeof(params))) {
6411 sev_unbind_asid(kvm, start->handle);
6413 goto e_free_session;
6416 sev->handle = start->handle;
6417 sev->fd = argp->sev_fd;
6420 kfree(session_blob);
6428 static unsigned long get_num_contig_pages(unsigned long idx,
6429 struct page **inpages, unsigned long npages)
6431 unsigned long paddr, next_paddr;
6432 unsigned long i = idx + 1, pages = 1;
6434 /* find the number of contiguous pages starting from idx */
6435 paddr = __sme_page_pa(inpages[idx]);
6436 while (i < npages) {
6437 next_paddr = __sme_page_pa(inpages[i++]);
6438 if ((paddr + PAGE_SIZE) == next_paddr) {
6449 static int sev_launch_update_data(struct kvm *kvm, struct kvm_sev_cmd *argp)
6451 unsigned long vaddr, vaddr_end, next_vaddr, npages, pages, size, i;
6452 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6453 struct kvm_sev_launch_update_data params;
6454 struct sev_data_launch_update_data *data;
6455 struct page **inpages;
6458 if (!sev_guest(kvm))
6461 if (copy_from_user(¶ms, (void __user *)(uintptr_t)argp->data, sizeof(params)))
6464 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6468 vaddr = params.uaddr;
6470 vaddr_end = vaddr + size;
6472 /* Lock the user memory. */
6473 inpages = sev_pin_memory(kvm, vaddr, size, &npages, 1);
6480 * The LAUNCH_UPDATE command will perform in-place encryption of the
6481 * memory content (i.e it will write the same memory region with C=1).
6482 * It's possible that the cache may contain the data with C=0, i.e.,
6483 * unencrypted so invalidate it first.
6485 sev_clflush_pages(inpages, npages);
6487 for (i = 0; vaddr < vaddr_end; vaddr = next_vaddr, i += pages) {
6491 * If the user buffer is not page-aligned, calculate the offset
6494 offset = vaddr & (PAGE_SIZE - 1);
6496 /* Calculate the number of pages that can be encrypted in one go. */
6497 pages = get_num_contig_pages(i, inpages, npages);
6499 len = min_t(size_t, ((pages * PAGE_SIZE) - offset), size);
6501 data->handle = sev->handle;
6503 data->address = __sme_page_pa(inpages[i]) + offset;
6504 ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_UPDATE_DATA, data, &argp->error);
6509 next_vaddr = vaddr + len;
6513 /* content of memory is updated, mark pages dirty */
6514 for (i = 0; i < npages; i++) {
6515 set_page_dirty_lock(inpages[i]);
6516 mark_page_accessed(inpages[i]);
6518 /* unlock the user pages */
6519 sev_unpin_memory(kvm, inpages, npages);
6525 static int sev_launch_measure(struct kvm *kvm, struct kvm_sev_cmd *argp)
6527 void __user *measure = (void __user *)(uintptr_t)argp->data;
6528 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6529 struct sev_data_launch_measure *data;
6530 struct kvm_sev_launch_measure params;
6531 void __user *p = NULL;
6535 if (!sev_guest(kvm))
6538 if (copy_from_user(¶ms, measure, sizeof(params)))
6541 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6545 /* User wants to query the blob length */
6549 p = (void __user *)(uintptr_t)params.uaddr;
6551 if (params.len > SEV_FW_BLOB_MAX_SIZE) {
6557 blob = kmalloc(params.len, GFP_KERNEL);
6561 data->address = __psp_pa(blob);
6562 data->len = params.len;
6566 data->handle = sev->handle;
6567 ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_MEASURE, data, &argp->error);
6570 * If we query the session length, FW responded with expected data.
6579 if (copy_to_user(p, blob, params.len))
6584 params.len = data->len;
6585 if (copy_to_user(measure, ¶ms, sizeof(params)))
6594 static int sev_launch_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
6596 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6597 struct sev_data_launch_finish *data;
6600 if (!sev_guest(kvm))
6603 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6607 data->handle = sev->handle;
6608 ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_FINISH, data, &argp->error);
6614 static int sev_guest_status(struct kvm *kvm, struct kvm_sev_cmd *argp)
6616 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6617 struct kvm_sev_guest_status params;
6618 struct sev_data_guest_status *data;
6621 if (!sev_guest(kvm))
6624 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6628 data->handle = sev->handle;
6629 ret = sev_issue_cmd(kvm, SEV_CMD_GUEST_STATUS, data, &argp->error);
6633 params.policy = data->policy;
6634 params.state = data->state;
6635 params.handle = data->handle;
6637 if (copy_to_user((void __user *)(uintptr_t)argp->data, ¶ms, sizeof(params)))
6644 static int __sev_issue_dbg_cmd(struct kvm *kvm, unsigned long src,
6645 unsigned long dst, int size,
6646 int *error, bool enc)
6648 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6649 struct sev_data_dbg *data;
6652 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6656 data->handle = sev->handle;
6657 data->dst_addr = dst;
6658 data->src_addr = src;
6661 ret = sev_issue_cmd(kvm,
6662 enc ? SEV_CMD_DBG_ENCRYPT : SEV_CMD_DBG_DECRYPT,
6668 static int __sev_dbg_decrypt(struct kvm *kvm, unsigned long src_paddr,
6669 unsigned long dst_paddr, int sz, int *err)
6674 * Its safe to read more than we are asked, caller should ensure that
6675 * destination has enough space.
6677 src_paddr = round_down(src_paddr, 16);
6678 offset = src_paddr & 15;
6679 sz = round_up(sz + offset, 16);
6681 return __sev_issue_dbg_cmd(kvm, src_paddr, dst_paddr, sz, err, false);
6684 static int __sev_dbg_decrypt_user(struct kvm *kvm, unsigned long paddr,
6685 unsigned long __user dst_uaddr,
6686 unsigned long dst_paddr,
6689 struct page *tpage = NULL;
6692 /* if inputs are not 16-byte then use intermediate buffer */
6693 if (!IS_ALIGNED(dst_paddr, 16) ||
6694 !IS_ALIGNED(paddr, 16) ||
6695 !IS_ALIGNED(size, 16)) {
6696 tpage = (void *)alloc_page(GFP_KERNEL);
6700 dst_paddr = __sme_page_pa(tpage);
6703 ret = __sev_dbg_decrypt(kvm, paddr, dst_paddr, size, err);
6708 offset = paddr & 15;
6709 if (copy_to_user((void __user *)(uintptr_t)dst_uaddr,
6710 page_address(tpage) + offset, size))
6721 static int __sev_dbg_encrypt_user(struct kvm *kvm, unsigned long paddr,
6722 unsigned long __user vaddr,
6723 unsigned long dst_paddr,
6724 unsigned long __user dst_vaddr,
6725 int size, int *error)
6727 struct page *src_tpage = NULL;
6728 struct page *dst_tpage = NULL;
6729 int ret, len = size;
6731 /* If source buffer is not aligned then use an intermediate buffer */
6732 if (!IS_ALIGNED(vaddr, 16)) {
6733 src_tpage = alloc_page(GFP_KERNEL);
6737 if (copy_from_user(page_address(src_tpage),
6738 (void __user *)(uintptr_t)vaddr, size)) {
6739 __free_page(src_tpage);
6743 paddr = __sme_page_pa(src_tpage);
6747 * If destination buffer or length is not aligned then do read-modify-write:
6748 * - decrypt destination in an intermediate buffer
6749 * - copy the source buffer in an intermediate buffer
6750 * - use the intermediate buffer as source buffer
6752 if (!IS_ALIGNED(dst_vaddr, 16) || !IS_ALIGNED(size, 16)) {
6755 dst_tpage = alloc_page(GFP_KERNEL);
6761 ret = __sev_dbg_decrypt(kvm, dst_paddr,
6762 __sme_page_pa(dst_tpage), size, error);
6767 * If source is kernel buffer then use memcpy() otherwise
6770 dst_offset = dst_paddr & 15;
6773 memcpy(page_address(dst_tpage) + dst_offset,
6774 page_address(src_tpage), size);
6776 if (copy_from_user(page_address(dst_tpage) + dst_offset,
6777 (void __user *)(uintptr_t)vaddr, size)) {
6783 paddr = __sme_page_pa(dst_tpage);
6784 dst_paddr = round_down(dst_paddr, 16);
6785 len = round_up(size, 16);
6788 ret = __sev_issue_dbg_cmd(kvm, paddr, dst_paddr, len, error, true);
6792 __free_page(src_tpage);
6794 __free_page(dst_tpage);
6798 static int sev_dbg_crypt(struct kvm *kvm, struct kvm_sev_cmd *argp, bool dec)
6800 unsigned long vaddr, vaddr_end, next_vaddr;
6801 unsigned long dst_vaddr;
6802 struct page **src_p, **dst_p;
6803 struct kvm_sev_dbg debug;
6808 if (!sev_guest(kvm))
6811 if (copy_from_user(&debug, (void __user *)(uintptr_t)argp->data, sizeof(debug)))
6814 if (!debug.len || debug.src_uaddr + debug.len < debug.src_uaddr)
6816 if (!debug.dst_uaddr)
6819 vaddr = debug.src_uaddr;
6821 vaddr_end = vaddr + size;
6822 dst_vaddr = debug.dst_uaddr;
6824 for (; vaddr < vaddr_end; vaddr = next_vaddr) {
6825 int len, s_off, d_off;
6827 /* lock userspace source and destination page */
6828 src_p = sev_pin_memory(kvm, vaddr & PAGE_MASK, PAGE_SIZE, &n, 0);
6832 dst_p = sev_pin_memory(kvm, dst_vaddr & PAGE_MASK, PAGE_SIZE, &n, 1);
6834 sev_unpin_memory(kvm, src_p, n);
6839 * The DBG_{DE,EN}CRYPT commands will perform {dec,en}cryption of the
6840 * memory content (i.e it will write the same memory region with C=1).
6841 * It's possible that the cache may contain the data with C=0, i.e.,
6842 * unencrypted so invalidate it first.
6844 sev_clflush_pages(src_p, 1);
6845 sev_clflush_pages(dst_p, 1);
6848 * Since user buffer may not be page aligned, calculate the
6849 * offset within the page.
6851 s_off = vaddr & ~PAGE_MASK;
6852 d_off = dst_vaddr & ~PAGE_MASK;
6853 len = min_t(size_t, (PAGE_SIZE - s_off), size);
6856 ret = __sev_dbg_decrypt_user(kvm,
6857 __sme_page_pa(src_p[0]) + s_off,
6859 __sme_page_pa(dst_p[0]) + d_off,
6862 ret = __sev_dbg_encrypt_user(kvm,
6863 __sme_page_pa(src_p[0]) + s_off,
6865 __sme_page_pa(dst_p[0]) + d_off,
6869 sev_unpin_memory(kvm, src_p, n);
6870 sev_unpin_memory(kvm, dst_p, n);
6875 next_vaddr = vaddr + len;
6876 dst_vaddr = dst_vaddr + len;
6883 static int sev_launch_secret(struct kvm *kvm, struct kvm_sev_cmd *argp)
6885 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6886 struct sev_data_launch_secret *data;
6887 struct kvm_sev_launch_secret params;
6888 struct page **pages;
6893 if (!sev_guest(kvm))
6896 if (copy_from_user(¶ms, (void __user *)(uintptr_t)argp->data, sizeof(params)))
6899 pages = sev_pin_memory(kvm, params.guest_uaddr, params.guest_len, &n, 1);
6904 * The secret must be copied into contiguous memory region, lets verify
6905 * that userspace memory pages are contiguous before we issue command.
6907 if (get_num_contig_pages(0, pages, n) != n) {
6909 goto e_unpin_memory;
6913 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6915 goto e_unpin_memory;
6917 offset = params.guest_uaddr & (PAGE_SIZE - 1);
6918 data->guest_address = __sme_page_pa(pages[0]) + offset;
6919 data->guest_len = params.guest_len;
6921 blob = psp_copy_user_blob(params.trans_uaddr, params.trans_len);
6923 ret = PTR_ERR(blob);
6927 data->trans_address = __psp_pa(blob);
6928 data->trans_len = params.trans_len;
6930 hdr = psp_copy_user_blob(params.hdr_uaddr, params.hdr_len);
6935 data->hdr_address = __psp_pa(hdr);
6936 data->hdr_len = params.hdr_len;
6938 data->handle = sev->handle;
6939 ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_UPDATE_SECRET, data, &argp->error);
6948 sev_unpin_memory(kvm, pages, n);
6952 static int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
6954 struct kvm_sev_cmd sev_cmd;
6957 if (!svm_sev_enabled())
6960 if (copy_from_user(&sev_cmd, argp, sizeof(struct kvm_sev_cmd)))
6963 mutex_lock(&kvm->lock);
6965 switch (sev_cmd.id) {
6967 r = sev_guest_init(kvm, &sev_cmd);
6969 case KVM_SEV_LAUNCH_START:
6970 r = sev_launch_start(kvm, &sev_cmd);
6972 case KVM_SEV_LAUNCH_UPDATE_DATA:
6973 r = sev_launch_update_data(kvm, &sev_cmd);
6975 case KVM_SEV_LAUNCH_MEASURE:
6976 r = sev_launch_measure(kvm, &sev_cmd);
6978 case KVM_SEV_LAUNCH_FINISH:
6979 r = sev_launch_finish(kvm, &sev_cmd);
6981 case KVM_SEV_GUEST_STATUS:
6982 r = sev_guest_status(kvm, &sev_cmd);
6984 case KVM_SEV_DBG_DECRYPT:
6985 r = sev_dbg_crypt(kvm, &sev_cmd, true);
6987 case KVM_SEV_DBG_ENCRYPT:
6988 r = sev_dbg_crypt(kvm, &sev_cmd, false);
6990 case KVM_SEV_LAUNCH_SECRET:
6991 r = sev_launch_secret(kvm, &sev_cmd);
6998 if (copy_to_user(argp, &sev_cmd, sizeof(struct kvm_sev_cmd)))
7002 mutex_unlock(&kvm->lock);
7006 static int svm_register_enc_region(struct kvm *kvm,
7007 struct kvm_enc_region *range)
7009 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
7010 struct enc_region *region;
7013 if (!sev_guest(kvm))
7016 if (range->addr > ULONG_MAX || range->size > ULONG_MAX)
7019 region = kzalloc(sizeof(*region), GFP_KERNEL_ACCOUNT);
7023 region->pages = sev_pin_memory(kvm, range->addr, range->size, ®ion->npages, 1);
7024 if (!region->pages) {
7030 * The guest may change the memory encryption attribute from C=0 -> C=1
7031 * or vice versa for this memory range. Lets make sure caches are
7032 * flushed to ensure that guest data gets written into memory with
7035 sev_clflush_pages(region->pages, region->npages);
7037 region->uaddr = range->addr;
7038 region->size = range->size;
7040 mutex_lock(&kvm->lock);
7041 list_add_tail(®ion->list, &sev->regions_list);
7042 mutex_unlock(&kvm->lock);
7051 static struct enc_region *
7052 find_enc_region(struct kvm *kvm, struct kvm_enc_region *range)
7054 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
7055 struct list_head *head = &sev->regions_list;
7056 struct enc_region *i;
7058 list_for_each_entry(i, head, list) {
7059 if (i->uaddr == range->addr &&
7060 i->size == range->size)
7068 static int svm_unregister_enc_region(struct kvm *kvm,
7069 struct kvm_enc_region *range)
7071 struct enc_region *region;
7074 mutex_lock(&kvm->lock);
7076 if (!sev_guest(kvm)) {
7081 region = find_enc_region(kvm, range);
7087 __unregister_enc_region_locked(kvm, region);
7089 mutex_unlock(&kvm->lock);
7093 mutex_unlock(&kvm->lock);
7097 static bool svm_need_emulation_on_page_fault(struct kvm_vcpu *vcpu)
7099 unsigned long cr4 = kvm_read_cr4(vcpu);
7100 bool smep = cr4 & X86_CR4_SMEP;
7101 bool smap = cr4 & X86_CR4_SMAP;
7102 bool is_user = svm_get_cpl(vcpu) == 3;
7105 * Detect and workaround Errata 1096 Fam_17h_00_0Fh.
7108 * When CPU raise #NPF on guest data access and vCPU CR4.SMAP=1, it is
7109 * possible that CPU microcode implementing DecodeAssist will fail
7110 * to read bytes of instruction which caused #NPF. In this case,
7111 * GuestIntrBytes field of the VMCB on a VMEXIT will incorrectly
7112 * return 0 instead of the correct guest instruction bytes.
7114 * This happens because CPU microcode reading instruction bytes
7115 * uses a special opcode which attempts to read data using CPL=0
7116 * priviledges. The microcode reads CS:RIP and if it hits a SMAP
7117 * fault, it gives up and returns no instruction bytes.
7120 * We reach here in case CPU supports DecodeAssist, raised #NPF and
7121 * returned 0 in GuestIntrBytes field of the VMCB.
7122 * First, errata can only be triggered in case vCPU CR4.SMAP=1.
7123 * Second, if vCPU CR4.SMEP=1, errata could only be triggered
7124 * in case vCPU CPL==3 (Because otherwise guest would have triggered
7125 * a SMEP fault instead of #NPF).
7126 * Otherwise, vCPU CR4.SMEP=0, errata could be triggered by any vCPU CPL.
7127 * As most guests enable SMAP if they have also enabled SMEP, use above
7128 * logic in order to attempt minimize false-positive of detecting errata
7129 * while still preserving all cases semantic correctness.
7132 * To determine what instruction the guest was executing, the hypervisor
7133 * will have to decode the instruction at the instruction pointer.
7135 * In non SEV guest, hypervisor will be able to read the guest
7136 * memory to decode the instruction pointer when insn_len is zero
7137 * so we return true to indicate that decoding is possible.
7139 * But in the SEV guest, the guest memory is encrypted with the
7140 * guest specific key and hypervisor will not be able to decode the
7141 * instruction pointer so we will not able to workaround it. Lets
7142 * print the error and request to kill the guest.
7144 if (smap && (!smep || is_user)) {
7145 if (!sev_guest(vcpu->kvm))
7148 pr_err_ratelimited("KVM: SEV Guest triggered AMD Erratum 1096\n");
7149 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
7155 static bool svm_apic_init_signal_blocked(struct kvm_vcpu *vcpu)
7157 struct vcpu_svm *svm = to_svm(vcpu);
7160 * TODO: Last condition latch INIT signals on vCPU when
7161 * vCPU is in guest-mode and vmcb12 defines intercept on INIT.
7162 * To properly emulate the INIT intercept, SVM should implement
7163 * kvm_x86_ops->check_nested_events() and call nested_svm_vmexit()
7164 * there if an INIT signal is pending.
7166 return !gif_set(svm) ||
7167 (svm->vmcb->control.intercept & (1ULL << INTERCEPT_INIT));
7170 static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
7171 .cpu_has_kvm_support = has_svm,
7172 .disabled_by_bios = is_disabled,
7173 .hardware_setup = svm_hardware_setup,
7174 .hardware_unsetup = svm_hardware_unsetup,
7175 .check_processor_compatibility = svm_check_processor_compat,
7176 .hardware_enable = svm_hardware_enable,
7177 .hardware_disable = svm_hardware_disable,
7178 .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
7179 .has_emulated_msr = svm_has_emulated_msr,
7181 .vcpu_create = svm_create_vcpu,
7182 .vcpu_free = svm_free_vcpu,
7183 .vcpu_reset = svm_vcpu_reset,
7185 .vm_alloc = svm_vm_alloc,
7186 .vm_free = svm_vm_free,
7187 .vm_init = avic_vm_init,
7188 .vm_destroy = svm_vm_destroy,
7190 .prepare_guest_switch = svm_prepare_guest_switch,
7191 .vcpu_load = svm_vcpu_load,
7192 .vcpu_put = svm_vcpu_put,
7193 .vcpu_blocking = svm_vcpu_blocking,
7194 .vcpu_unblocking = svm_vcpu_unblocking,
7196 .update_bp_intercept = update_bp_intercept,
7197 .get_msr_feature = svm_get_msr_feature,
7198 .get_msr = svm_get_msr,
7199 .set_msr = svm_set_msr,
7200 .get_segment_base = svm_get_segment_base,
7201 .get_segment = svm_get_segment,
7202 .set_segment = svm_set_segment,
7203 .get_cpl = svm_get_cpl,
7204 .get_cs_db_l_bits = kvm_get_cs_db_l_bits,
7205 .decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
7206 .decache_cr3 = svm_decache_cr3,
7207 .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
7208 .set_cr0 = svm_set_cr0,
7209 .set_cr3 = svm_set_cr3,
7210 .set_cr4 = svm_set_cr4,
7211 .set_efer = svm_set_efer,
7212 .get_idt = svm_get_idt,
7213 .set_idt = svm_set_idt,
7214 .get_gdt = svm_get_gdt,
7215 .set_gdt = svm_set_gdt,
7216 .get_dr6 = svm_get_dr6,
7217 .set_dr6 = svm_set_dr6,
7218 .set_dr7 = svm_set_dr7,
7219 .sync_dirty_debug_regs = svm_sync_dirty_debug_regs,
7220 .cache_reg = svm_cache_reg,
7221 .get_rflags = svm_get_rflags,
7222 .set_rflags = svm_set_rflags,
7224 .tlb_flush = svm_flush_tlb,
7225 .tlb_flush_gva = svm_flush_tlb_gva,
7227 .run = svm_vcpu_run,
7228 .handle_exit = handle_exit,
7229 .skip_emulated_instruction = skip_emulated_instruction,
7230 .set_interrupt_shadow = svm_set_interrupt_shadow,
7231 .get_interrupt_shadow = svm_get_interrupt_shadow,
7232 .patch_hypercall = svm_patch_hypercall,
7233 .set_irq = svm_set_irq,
7234 .set_nmi = svm_inject_nmi,
7235 .queue_exception = svm_queue_exception,
7236 .cancel_injection = svm_cancel_injection,
7237 .interrupt_allowed = svm_interrupt_allowed,
7238 .nmi_allowed = svm_nmi_allowed,
7239 .get_nmi_mask = svm_get_nmi_mask,
7240 .set_nmi_mask = svm_set_nmi_mask,
7241 .enable_nmi_window = enable_nmi_window,
7242 .enable_irq_window = enable_irq_window,
7243 .update_cr8_intercept = update_cr8_intercept,
7244 .set_virtual_apic_mode = svm_set_virtual_apic_mode,
7245 .get_enable_apicv = svm_get_enable_apicv,
7246 .refresh_apicv_exec_ctrl = svm_refresh_apicv_exec_ctrl,
7247 .load_eoi_exitmap = svm_load_eoi_exitmap,
7248 .hwapic_irr_update = svm_hwapic_irr_update,
7249 .hwapic_isr_update = svm_hwapic_isr_update,
7250 .sync_pir_to_irr = kvm_lapic_find_highest_irr,
7251 .apicv_post_state_restore = avic_post_state_restore,
7253 .set_tss_addr = svm_set_tss_addr,
7254 .set_identity_map_addr = svm_set_identity_map_addr,
7255 .get_tdp_level = get_npt_level,
7256 .get_mt_mask = svm_get_mt_mask,
7258 .get_exit_info = svm_get_exit_info,
7260 .get_lpage_level = svm_get_lpage_level,
7262 .cpuid_update = svm_cpuid_update,
7264 .rdtscp_supported = svm_rdtscp_supported,
7265 .invpcid_supported = svm_invpcid_supported,
7266 .mpx_supported = svm_mpx_supported,
7267 .xsaves_supported = svm_xsaves_supported,
7268 .umip_emulated = svm_umip_emulated,
7269 .pt_supported = svm_pt_supported,
7271 .set_supported_cpuid = svm_set_supported_cpuid,
7273 .has_wbinvd_exit = svm_has_wbinvd_exit,
7275 .read_l1_tsc_offset = svm_read_l1_tsc_offset,
7276 .write_l1_tsc_offset = svm_write_l1_tsc_offset,
7278 .set_tdp_cr3 = set_tdp_cr3,
7280 .check_intercept = svm_check_intercept,
7281 .handle_exit_irqoff = svm_handle_exit_irqoff,
7283 .request_immediate_exit = __kvm_request_immediate_exit,
7285 .sched_in = svm_sched_in,
7287 .pmu_ops = &amd_pmu_ops,
7288 .deliver_posted_interrupt = svm_deliver_avic_intr,
7289 .dy_apicv_has_pending_interrupt = svm_dy_apicv_has_pending_interrupt,
7290 .update_pi_irte = svm_update_pi_irte,
7291 .setup_mce = svm_setup_mce,
7293 .smi_allowed = svm_smi_allowed,
7294 .pre_enter_smm = svm_pre_enter_smm,
7295 .pre_leave_smm = svm_pre_leave_smm,
7296 .enable_smi_window = enable_smi_window,
7298 .mem_enc_op = svm_mem_enc_op,
7299 .mem_enc_reg_region = svm_register_enc_region,
7300 .mem_enc_unreg_region = svm_unregister_enc_region,
7302 .nested_enable_evmcs = NULL,
7303 .nested_get_evmcs_version = NULL,
7305 .need_emulation_on_page_fault = svm_need_emulation_on_page_fault,
7307 .apic_init_signal_blocked = svm_apic_init_signal_blocked,
7310 static int __init svm_init(void)
7312 return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
7313 __alignof__(struct vcpu_svm), THIS_MODULE);
7316 static void __exit svm_exit(void)
7321 module_init(svm_init)
7322 module_exit(svm_exit)