2 * Kernel-based Virtual Machine driver for Linux
6 * Copyright (C) 2006 Qumranet, Inc.
7 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
10 * Yaniv Kamay <yaniv@qumranet.com>
11 * Avi Kivity <avi@qumranet.com>
13 * This work is licensed under the terms of the GNU GPL, version 2. See
14 * the COPYING file in the top-level directory.
18 #define pr_fmt(fmt) "SVM: " fmt
20 #include <linux/kvm_host.h>
24 #include "kvm_cache_regs.h"
29 #include <linux/module.h>
30 #include <linux/mod_devicetable.h>
31 #include <linux/kernel.h>
32 #include <linux/vmalloc.h>
33 #include <linux/highmem.h>
34 #include <linux/sched.h>
35 #include <linux/trace_events.h>
36 #include <linux/slab.h>
37 #include <linux/amd-iommu.h>
38 #include <linux/hashtable.h>
41 #include <asm/perf_event.h>
42 #include <asm/tlbflush.h>
44 #include <asm/debugreg.h>
45 #include <asm/kvm_para.h>
46 #include <asm/irq_remapping.h>
48 #include <asm/virtext.h>
51 #define __ex(x) __kvm_handle_fault_on_reboot(x)
53 MODULE_AUTHOR("Qumranet");
54 MODULE_LICENSE("GPL");
56 static const struct x86_cpu_id svm_cpu_id
[] = {
57 X86_FEATURE_MATCH(X86_FEATURE_SVM
),
60 MODULE_DEVICE_TABLE(x86cpu
, svm_cpu_id
);
62 #define IOPM_ALLOC_ORDER 2
63 #define MSRPM_ALLOC_ORDER 1
65 #define SEG_TYPE_LDT 2
66 #define SEG_TYPE_BUSY_TSS16 3
68 #define SVM_FEATURE_NPT (1 << 0)
69 #define SVM_FEATURE_LBRV (1 << 1)
70 #define SVM_FEATURE_SVML (1 << 2)
71 #define SVM_FEATURE_NRIP (1 << 3)
72 #define SVM_FEATURE_TSC_RATE (1 << 4)
73 #define SVM_FEATURE_VMCB_CLEAN (1 << 5)
74 #define SVM_FEATURE_FLUSH_ASID (1 << 6)
75 #define SVM_FEATURE_DECODE_ASSIST (1 << 7)
76 #define SVM_FEATURE_PAUSE_FILTER (1 << 10)
78 #define SVM_AVIC_DOORBELL 0xc001011b
80 #define NESTED_EXIT_HOST 0 /* Exit handled on host level */
81 #define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */
82 #define NESTED_EXIT_CONTINUE 2 /* Further checks needed */
84 #define DEBUGCTL_RESERVED_BITS (~(0x3fULL))
86 #define TSC_RATIO_RSVD 0xffffff0000000000ULL
87 #define TSC_RATIO_MIN 0x0000000000000001ULL
88 #define TSC_RATIO_MAX 0x000000ffffffffffULL
90 #define AVIC_HPA_MASK ~((0xFFFULL << 52) | 0xFFF)
93 * 0xff is broadcast, so the max index allowed for physical APIC ID
94 * table is 0xfe. APIC IDs above 0xff are reserved.
96 #define AVIC_MAX_PHYSICAL_ID_COUNT 255
98 #define AVIC_UNACCEL_ACCESS_WRITE_MASK 1
99 #define AVIC_UNACCEL_ACCESS_OFFSET_MASK 0xFF0
100 #define AVIC_UNACCEL_ACCESS_VECTOR_MASK 0xFFFFFFFF
102 /* AVIC GATAG is encoded using VM and VCPU IDs */
103 #define AVIC_VCPU_ID_BITS 8
104 #define AVIC_VCPU_ID_MASK ((1 << AVIC_VCPU_ID_BITS) - 1)
106 #define AVIC_VM_ID_BITS 24
107 #define AVIC_VM_ID_NR (1 << AVIC_VM_ID_BITS)
108 #define AVIC_VM_ID_MASK ((1 << AVIC_VM_ID_BITS) - 1)
110 #define AVIC_GATAG(x, y) (((x & AVIC_VM_ID_MASK) << AVIC_VCPU_ID_BITS) | \
111 (y & AVIC_VCPU_ID_MASK))
112 #define AVIC_GATAG_TO_VMID(x) ((x >> AVIC_VCPU_ID_BITS) & AVIC_VM_ID_MASK)
113 #define AVIC_GATAG_TO_VCPUID(x) (x & AVIC_VCPU_ID_MASK)
115 static bool erratum_383_found __read_mostly
;
117 static const u32 host_save_user_msrs
[] = {
119 MSR_STAR
, MSR_LSTAR
, MSR_CSTAR
, MSR_SYSCALL_MASK
, MSR_KERNEL_GS_BASE
,
122 MSR_IA32_SYSENTER_CS
, MSR_IA32_SYSENTER_ESP
, MSR_IA32_SYSENTER_EIP
,
126 #define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)
130 struct nested_state
{
136 /* These are the merged vectors */
139 /* gpa pointers to the real vectors */
143 /* A VMEXIT is required but not yet emulated */
146 /* cache for intercepts of the guest */
149 u32 intercept_exceptions
;
152 /* Nested Paging related state */
156 #define MSRPM_OFFSETS 16
157 static u32 msrpm_offsets
[MSRPM_OFFSETS
] __read_mostly
;
160 * Set osvw_len to higher value when updated Revision Guides
161 * are published and we know what the new status bits are
163 static uint64_t osvw_len
= 4, osvw_status
;
166 struct kvm_vcpu vcpu
;
168 unsigned long vmcb_pa
;
169 struct svm_cpu_data
*svm_data
;
170 uint64_t asid_generation
;
171 uint64_t sysenter_esp
;
172 uint64_t sysenter_eip
;
177 u64 host_user_msrs
[NR_HOST_SAVE_USER_MSRS
];
189 struct nested_state nested
;
193 unsigned int3_injected
;
194 unsigned long int3_rip
;
197 /* cached guest cpuid flags for faster access */
198 bool nrips_enabled
: 1;
201 struct page
*avic_backing_page
;
202 u64
*avic_physical_id_cache
;
203 bool avic_is_running
;
206 * Per-vcpu list of struct amd_svm_iommu_ir:
207 * This is used mainly to store interrupt remapping information used
208 * when update the vcpu affinity. This avoids the need to scan for
209 * IRTE and try to match ga_tag in the IOMMU driver.
211 struct list_head ir_list
;
212 spinlock_t ir_list_lock
;
216 * This is a wrapper of struct amd_iommu_ir_data.
218 struct amd_svm_iommu_ir
{
219 struct list_head node
; /* Used by SVM for per-vcpu ir_list */
220 void *data
; /* Storing pointer to struct amd_ir_data */
223 #define AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK (0xFF)
224 #define AVIC_LOGICAL_ID_ENTRY_VALID_MASK (1 << 31)
226 #define AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK (0xFFULL)
227 #define AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK (0xFFFFFFFFFFULL << 12)
228 #define AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK (1ULL << 62)
229 #define AVIC_PHYSICAL_ID_ENTRY_VALID_MASK (1ULL << 63)
231 static DEFINE_PER_CPU(u64
, current_tsc_ratio
);
232 #define TSC_RATIO_DEFAULT 0x0100000000ULL
234 #define MSR_INVALID 0xffffffffU
236 static const struct svm_direct_access_msrs
{
237 u32 index
; /* Index of the MSR */
238 bool always
; /* True if intercept is always on */
239 } direct_access_msrs
[] = {
240 { .index
= MSR_STAR
, .always
= true },
241 { .index
= MSR_IA32_SYSENTER_CS
, .always
= true },
243 { .index
= MSR_GS_BASE
, .always
= true },
244 { .index
= MSR_FS_BASE
, .always
= true },
245 { .index
= MSR_KERNEL_GS_BASE
, .always
= true },
246 { .index
= MSR_LSTAR
, .always
= true },
247 { .index
= MSR_CSTAR
, .always
= true },
248 { .index
= MSR_SYSCALL_MASK
, .always
= true },
250 { .index
= MSR_IA32_LASTBRANCHFROMIP
, .always
= false },
251 { .index
= MSR_IA32_LASTBRANCHTOIP
, .always
= false },
252 { .index
= MSR_IA32_LASTINTFROMIP
, .always
= false },
253 { .index
= MSR_IA32_LASTINTTOIP
, .always
= false },
254 { .index
= MSR_INVALID
, .always
= false },
257 /* enable NPT for AMD64 and X86 with PAE */
258 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
259 static bool npt_enabled
= true;
261 static bool npt_enabled
;
264 /* allow nested paging (virtualized MMU) for all guests */
265 static int npt
= true;
266 module_param(npt
, int, S_IRUGO
);
268 /* allow nested virtualization in KVM/SVM */
269 static int nested
= true;
270 module_param(nested
, int, S_IRUGO
);
272 /* enable / disable AVIC */
274 #ifdef CONFIG_X86_LOCAL_APIC
275 module_param(avic
, int, S_IRUGO
);
278 /* AVIC VM ID bit masks and lock */
279 static DECLARE_BITMAP(avic_vm_id_bitmap
, AVIC_VM_ID_NR
);
280 static DEFINE_SPINLOCK(avic_vm_id_lock
);
282 static void svm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
);
283 static void svm_flush_tlb(struct kvm_vcpu
*vcpu
);
284 static void svm_complete_interrupts(struct vcpu_svm
*svm
);
286 static int nested_svm_exit_handled(struct vcpu_svm
*svm
);
287 static int nested_svm_intercept(struct vcpu_svm
*svm
);
288 static int nested_svm_vmexit(struct vcpu_svm
*svm
);
289 static int nested_svm_check_exception(struct vcpu_svm
*svm
, unsigned nr
,
290 bool has_error_code
, u32 error_code
);
293 VMCB_INTERCEPTS
, /* Intercept vectors, TSC offset,
294 pause filter count */
295 VMCB_PERM_MAP
, /* IOPM Base and MSRPM Base */
296 VMCB_ASID
, /* ASID */
297 VMCB_INTR
, /* int_ctl, int_vector */
298 VMCB_NPT
, /* npt_en, nCR3, gPAT */
299 VMCB_CR
, /* CR0, CR3, CR4, EFER */
300 VMCB_DR
, /* DR6, DR7 */
301 VMCB_DT
, /* GDT, IDT */
302 VMCB_SEG
, /* CS, DS, SS, ES, CPL */
303 VMCB_CR2
, /* CR2 only */
304 VMCB_LBR
, /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */
305 VMCB_AVIC
, /* AVIC APIC_BAR, AVIC APIC_BACKING_PAGE,
306 * AVIC PHYSICAL_TABLE pointer,
307 * AVIC LOGICAL_TABLE pointer
312 /* TPR and CR2 are always written before VMRUN */
313 #define VMCB_ALWAYS_DIRTY_MASK ((1U << VMCB_INTR) | (1U << VMCB_CR2))
315 #define VMCB_AVIC_APIC_BAR_MASK 0xFFFFFFFFFF000ULL
317 static inline void mark_all_dirty(struct vmcb
*vmcb
)
319 vmcb
->control
.clean
= 0;
322 static inline void mark_all_clean(struct vmcb
*vmcb
)
324 vmcb
->control
.clean
= ((1 << VMCB_DIRTY_MAX
) - 1)
325 & ~VMCB_ALWAYS_DIRTY_MASK
;
328 static inline void mark_dirty(struct vmcb
*vmcb
, int bit
)
330 vmcb
->control
.clean
&= ~(1 << bit
);
333 static inline struct vcpu_svm
*to_svm(struct kvm_vcpu
*vcpu
)
335 return container_of(vcpu
, struct vcpu_svm
, vcpu
);
338 static inline void avic_update_vapic_bar(struct vcpu_svm
*svm
, u64 data
)
340 svm
->vmcb
->control
.avic_vapic_bar
= data
& VMCB_AVIC_APIC_BAR_MASK
;
341 mark_dirty(svm
->vmcb
, VMCB_AVIC
);
344 static inline bool avic_vcpu_is_running(struct kvm_vcpu
*vcpu
)
346 struct vcpu_svm
*svm
= to_svm(vcpu
);
347 u64
*entry
= svm
->avic_physical_id_cache
;
352 return (READ_ONCE(*entry
) & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK
);
355 static void recalc_intercepts(struct vcpu_svm
*svm
)
357 struct vmcb_control_area
*c
, *h
;
358 struct nested_state
*g
;
360 mark_dirty(svm
->vmcb
, VMCB_INTERCEPTS
);
362 if (!is_guest_mode(&svm
->vcpu
))
365 c
= &svm
->vmcb
->control
;
366 h
= &svm
->nested
.hsave
->control
;
369 c
->intercept_cr
= h
->intercept_cr
| g
->intercept_cr
;
370 c
->intercept_dr
= h
->intercept_dr
| g
->intercept_dr
;
371 c
->intercept_exceptions
= h
->intercept_exceptions
| g
->intercept_exceptions
;
372 c
->intercept
= h
->intercept
| g
->intercept
;
375 static inline struct vmcb
*get_host_vmcb(struct vcpu_svm
*svm
)
377 if (is_guest_mode(&svm
->vcpu
))
378 return svm
->nested
.hsave
;
383 static inline void set_cr_intercept(struct vcpu_svm
*svm
, int bit
)
385 struct vmcb
*vmcb
= get_host_vmcb(svm
);
387 vmcb
->control
.intercept_cr
|= (1U << bit
);
389 recalc_intercepts(svm
);
392 static inline void clr_cr_intercept(struct vcpu_svm
*svm
, int bit
)
394 struct vmcb
*vmcb
= get_host_vmcb(svm
);
396 vmcb
->control
.intercept_cr
&= ~(1U << bit
);
398 recalc_intercepts(svm
);
401 static inline bool is_cr_intercept(struct vcpu_svm
*svm
, int bit
)
403 struct vmcb
*vmcb
= get_host_vmcb(svm
);
405 return vmcb
->control
.intercept_cr
& (1U << bit
);
408 static inline void set_dr_intercepts(struct vcpu_svm
*svm
)
410 struct vmcb
*vmcb
= get_host_vmcb(svm
);
412 vmcb
->control
.intercept_dr
= (1 << INTERCEPT_DR0_READ
)
413 | (1 << INTERCEPT_DR1_READ
)
414 | (1 << INTERCEPT_DR2_READ
)
415 | (1 << INTERCEPT_DR3_READ
)
416 | (1 << INTERCEPT_DR4_READ
)
417 | (1 << INTERCEPT_DR5_READ
)
418 | (1 << INTERCEPT_DR6_READ
)
419 | (1 << INTERCEPT_DR7_READ
)
420 | (1 << INTERCEPT_DR0_WRITE
)
421 | (1 << INTERCEPT_DR1_WRITE
)
422 | (1 << INTERCEPT_DR2_WRITE
)
423 | (1 << INTERCEPT_DR3_WRITE
)
424 | (1 << INTERCEPT_DR4_WRITE
)
425 | (1 << INTERCEPT_DR5_WRITE
)
426 | (1 << INTERCEPT_DR6_WRITE
)
427 | (1 << INTERCEPT_DR7_WRITE
);
429 recalc_intercepts(svm
);
432 static inline void clr_dr_intercepts(struct vcpu_svm
*svm
)
434 struct vmcb
*vmcb
= get_host_vmcb(svm
);
436 vmcb
->control
.intercept_dr
= 0;
438 recalc_intercepts(svm
);
441 static inline void set_exception_intercept(struct vcpu_svm
*svm
, int bit
)
443 struct vmcb
*vmcb
= get_host_vmcb(svm
);
445 vmcb
->control
.intercept_exceptions
|= (1U << bit
);
447 recalc_intercepts(svm
);
450 static inline void clr_exception_intercept(struct vcpu_svm
*svm
, int bit
)
452 struct vmcb
*vmcb
= get_host_vmcb(svm
);
454 vmcb
->control
.intercept_exceptions
&= ~(1U << bit
);
456 recalc_intercepts(svm
);
459 static inline void set_intercept(struct vcpu_svm
*svm
, int bit
)
461 struct vmcb
*vmcb
= get_host_vmcb(svm
);
463 vmcb
->control
.intercept
|= (1ULL << bit
);
465 recalc_intercepts(svm
);
468 static inline void clr_intercept(struct vcpu_svm
*svm
, int bit
)
470 struct vmcb
*vmcb
= get_host_vmcb(svm
);
472 vmcb
->control
.intercept
&= ~(1ULL << bit
);
474 recalc_intercepts(svm
);
477 static inline void enable_gif(struct vcpu_svm
*svm
)
479 svm
->vcpu
.arch
.hflags
|= HF_GIF_MASK
;
482 static inline void disable_gif(struct vcpu_svm
*svm
)
484 svm
->vcpu
.arch
.hflags
&= ~HF_GIF_MASK
;
487 static inline bool gif_set(struct vcpu_svm
*svm
)
489 return !!(svm
->vcpu
.arch
.hflags
& HF_GIF_MASK
);
492 static unsigned long iopm_base
;
494 struct kvm_ldttss_desc
{
497 unsigned base1
:8, type
:5, dpl
:2, p
:1;
498 unsigned limit1
:4, zero0
:3, g
:1, base2
:8;
501 } __attribute__((packed
));
503 struct svm_cpu_data
{
509 struct kvm_ldttss_desc
*tss_desc
;
511 struct page
*save_area
;
514 static DEFINE_PER_CPU(struct svm_cpu_data
*, svm_data
);
516 struct svm_init_data
{
521 static const u32 msrpm_ranges
[] = {0, 0xc0000000, 0xc0010000};
523 #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
524 #define MSRS_RANGE_SIZE 2048
525 #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
527 static u32
svm_msrpm_offset(u32 msr
)
532 for (i
= 0; i
< NUM_MSR_MAPS
; i
++) {
533 if (msr
< msrpm_ranges
[i
] ||
534 msr
>= msrpm_ranges
[i
] + MSRS_IN_RANGE
)
537 offset
= (msr
- msrpm_ranges
[i
]) / 4; /* 4 msrs per u8 */
538 offset
+= (i
* MSRS_RANGE_SIZE
); /* add range offset */
540 /* Now we have the u8 offset - but need the u32 offset */
544 /* MSR not in any range */
548 #define MAX_INST_SIZE 15
550 static inline void clgi(void)
552 asm volatile (__ex(SVM_CLGI
));
555 static inline void stgi(void)
557 asm volatile (__ex(SVM_STGI
));
560 static inline void invlpga(unsigned long addr
, u32 asid
)
562 asm volatile (__ex(SVM_INVLPGA
) : : "a"(addr
), "c"(asid
));
565 static int get_npt_level(void)
568 return PT64_ROOT_LEVEL
;
570 return PT32E_ROOT_LEVEL
;
574 static void svm_set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
576 vcpu
->arch
.efer
= efer
;
577 if (!npt_enabled
&& !(efer
& EFER_LMA
))
580 to_svm(vcpu
)->vmcb
->save
.efer
= efer
| EFER_SVME
;
581 mark_dirty(to_svm(vcpu
)->vmcb
, VMCB_CR
);
584 static int is_external_interrupt(u32 info
)
586 info
&= SVM_EVTINJ_TYPE_MASK
| SVM_EVTINJ_VALID
;
587 return info
== (SVM_EVTINJ_VALID
| SVM_EVTINJ_TYPE_INTR
);
590 static u32
svm_get_interrupt_shadow(struct kvm_vcpu
*vcpu
)
592 struct vcpu_svm
*svm
= to_svm(vcpu
);
595 if (svm
->vmcb
->control
.int_state
& SVM_INTERRUPT_SHADOW_MASK
)
596 ret
= KVM_X86_SHADOW_INT_STI
| KVM_X86_SHADOW_INT_MOV_SS
;
600 static void svm_set_interrupt_shadow(struct kvm_vcpu
*vcpu
, int mask
)
602 struct vcpu_svm
*svm
= to_svm(vcpu
);
605 svm
->vmcb
->control
.int_state
&= ~SVM_INTERRUPT_SHADOW_MASK
;
607 svm
->vmcb
->control
.int_state
|= SVM_INTERRUPT_SHADOW_MASK
;
611 static void skip_emulated_instruction(struct kvm_vcpu
*vcpu
)
613 struct vcpu_svm
*svm
= to_svm(vcpu
);
615 if (svm
->vmcb
->control
.next_rip
!= 0) {
616 WARN_ON_ONCE(!static_cpu_has(X86_FEATURE_NRIPS
));
617 svm
->next_rip
= svm
->vmcb
->control
.next_rip
;
620 if (!svm
->next_rip
) {
621 if (emulate_instruction(vcpu
, EMULTYPE_SKIP
) !=
623 printk(KERN_DEBUG
"%s: NOP\n", __func__
);
626 if (svm
->next_rip
- kvm_rip_read(vcpu
) > MAX_INST_SIZE
)
627 printk(KERN_ERR
"%s: ip 0x%lx next 0x%llx\n",
628 __func__
, kvm_rip_read(vcpu
), svm
->next_rip
);
630 kvm_rip_write(vcpu
, svm
->next_rip
);
631 svm_set_interrupt_shadow(vcpu
, 0);
634 static void svm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
,
635 bool has_error_code
, u32 error_code
,
638 struct vcpu_svm
*svm
= to_svm(vcpu
);
641 * If we are within a nested VM we'd better #VMEXIT and let the guest
642 * handle the exception
645 nested_svm_check_exception(svm
, nr
, has_error_code
, error_code
))
648 if (nr
== BP_VECTOR
&& !static_cpu_has(X86_FEATURE_NRIPS
)) {
649 unsigned long rip
, old_rip
= kvm_rip_read(&svm
->vcpu
);
652 * For guest debugging where we have to reinject #BP if some
653 * INT3 is guest-owned:
654 * Emulate nRIP by moving RIP forward. Will fail if injection
655 * raises a fault that is not intercepted. Still better than
656 * failing in all cases.
658 skip_emulated_instruction(&svm
->vcpu
);
659 rip
= kvm_rip_read(&svm
->vcpu
);
660 svm
->int3_rip
= rip
+ svm
->vmcb
->save
.cs
.base
;
661 svm
->int3_injected
= rip
- old_rip
;
664 svm
->vmcb
->control
.event_inj
= nr
666 | (has_error_code
? SVM_EVTINJ_VALID_ERR
: 0)
667 | SVM_EVTINJ_TYPE_EXEPT
;
668 svm
->vmcb
->control
.event_inj_err
= error_code
;
671 static void svm_init_erratum_383(void)
677 if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH
))
680 /* Use _safe variants to not break nested virtualization */
681 val
= native_read_msr_safe(MSR_AMD64_DC_CFG
, &err
);
687 low
= lower_32_bits(val
);
688 high
= upper_32_bits(val
);
690 native_write_msr_safe(MSR_AMD64_DC_CFG
, low
, high
);
692 erratum_383_found
= true;
695 static void svm_init_osvw(struct kvm_vcpu
*vcpu
)
698 * Guests should see errata 400 and 415 as fixed (assuming that
699 * HLT and IO instructions are intercepted).
701 vcpu
->arch
.osvw
.length
= (osvw_len
>= 3) ? (osvw_len
) : 3;
702 vcpu
->arch
.osvw
.status
= osvw_status
& ~(6ULL);
705 * By increasing VCPU's osvw.length to 3 we are telling the guest that
706 * all osvw.status bits inside that length, including bit 0 (which is
707 * reserved for erratum 298), are valid. However, if host processor's
708 * osvw_len is 0 then osvw_status[0] carries no information. We need to
709 * be conservative here and therefore we tell the guest that erratum 298
710 * is present (because we really don't know).
712 if (osvw_len
== 0 && boot_cpu_data
.x86
== 0x10)
713 vcpu
->arch
.osvw
.status
|= 1;
716 static int has_svm(void)
720 if (!cpu_has_svm(&msg
)) {
721 printk(KERN_INFO
"has_svm: %s\n", msg
);
728 static void svm_hardware_disable(void)
730 /* Make sure we clean up behind us */
731 if (static_cpu_has(X86_FEATURE_TSCRATEMSR
))
732 wrmsrl(MSR_AMD64_TSC_RATIO
, TSC_RATIO_DEFAULT
);
736 amd_pmu_disable_virt();
739 static int svm_hardware_enable(void)
742 struct svm_cpu_data
*sd
;
744 struct desc_ptr gdt_descr
;
745 struct desc_struct
*gdt
;
746 int me
= raw_smp_processor_id();
748 rdmsrl(MSR_EFER
, efer
);
749 if (efer
& EFER_SVME
)
753 pr_err("%s: err EOPNOTSUPP on %d\n", __func__
, me
);
756 sd
= per_cpu(svm_data
, me
);
758 pr_err("%s: svm_data is NULL on %d\n", __func__
, me
);
762 sd
->asid_generation
= 1;
763 sd
->max_asid
= cpuid_ebx(SVM_CPUID_FUNC
) - 1;
764 sd
->next_asid
= sd
->max_asid
+ 1;
766 native_store_gdt(&gdt_descr
);
767 gdt
= (struct desc_struct
*)gdt_descr
.address
;
768 sd
->tss_desc
= (struct kvm_ldttss_desc
*)(gdt
+ GDT_ENTRY_TSS
);
770 wrmsrl(MSR_EFER
, efer
| EFER_SVME
);
772 wrmsrl(MSR_VM_HSAVE_PA
, page_to_pfn(sd
->save_area
) << PAGE_SHIFT
);
774 if (static_cpu_has(X86_FEATURE_TSCRATEMSR
)) {
775 wrmsrl(MSR_AMD64_TSC_RATIO
, TSC_RATIO_DEFAULT
);
776 __this_cpu_write(current_tsc_ratio
, TSC_RATIO_DEFAULT
);
783 * Note that it is possible to have a system with mixed processor
784 * revisions and therefore different OSVW bits. If bits are not the same
785 * on different processors then choose the worst case (i.e. if erratum
786 * is present on one processor and not on another then assume that the
787 * erratum is present everywhere).
789 if (cpu_has(&boot_cpu_data
, X86_FEATURE_OSVW
)) {
790 uint64_t len
, status
= 0;
793 len
= native_read_msr_safe(MSR_AMD64_OSVW_ID_LENGTH
, &err
);
795 status
= native_read_msr_safe(MSR_AMD64_OSVW_STATUS
,
799 osvw_status
= osvw_len
= 0;
803 osvw_status
|= status
;
804 osvw_status
&= (1ULL << osvw_len
) - 1;
807 osvw_status
= osvw_len
= 0;
809 svm_init_erratum_383();
811 amd_pmu_enable_virt();
816 static void svm_cpu_uninit(int cpu
)
818 struct svm_cpu_data
*sd
= per_cpu(svm_data
, raw_smp_processor_id());
823 per_cpu(svm_data
, raw_smp_processor_id()) = NULL
;
824 __free_page(sd
->save_area
);
828 static int svm_cpu_init(int cpu
)
830 struct svm_cpu_data
*sd
;
833 sd
= kzalloc(sizeof(struct svm_cpu_data
), GFP_KERNEL
);
837 sd
->save_area
= alloc_page(GFP_KERNEL
);
842 per_cpu(svm_data
, cpu
) = sd
;
852 static bool valid_msr_intercept(u32 index
)
856 for (i
= 0; direct_access_msrs
[i
].index
!= MSR_INVALID
; i
++)
857 if (direct_access_msrs
[i
].index
== index
)
863 static void set_msr_interception(u32
*msrpm
, unsigned msr
,
866 u8 bit_read
, bit_write
;
871 * If this warning triggers extend the direct_access_msrs list at the
872 * beginning of the file
874 WARN_ON(!valid_msr_intercept(msr
));
876 offset
= svm_msrpm_offset(msr
);
877 bit_read
= 2 * (msr
& 0x0f);
878 bit_write
= 2 * (msr
& 0x0f) + 1;
881 BUG_ON(offset
== MSR_INVALID
);
883 read
? clear_bit(bit_read
, &tmp
) : set_bit(bit_read
, &tmp
);
884 write
? clear_bit(bit_write
, &tmp
) : set_bit(bit_write
, &tmp
);
889 static void svm_vcpu_init_msrpm(u32
*msrpm
)
893 memset(msrpm
, 0xff, PAGE_SIZE
* (1 << MSRPM_ALLOC_ORDER
));
895 for (i
= 0; direct_access_msrs
[i
].index
!= MSR_INVALID
; i
++) {
896 if (!direct_access_msrs
[i
].always
)
899 set_msr_interception(msrpm
, direct_access_msrs
[i
].index
, 1, 1);
903 static void add_msr_offset(u32 offset
)
907 for (i
= 0; i
< MSRPM_OFFSETS
; ++i
) {
909 /* Offset already in list? */
910 if (msrpm_offsets
[i
] == offset
)
913 /* Slot used by another offset? */
914 if (msrpm_offsets
[i
] != MSR_INVALID
)
917 /* Add offset to list */
918 msrpm_offsets
[i
] = offset
;
924 * If this BUG triggers the msrpm_offsets table has an overflow. Just
925 * increase MSRPM_OFFSETS in this case.
930 static void init_msrpm_offsets(void)
934 memset(msrpm_offsets
, 0xff, sizeof(msrpm_offsets
));
936 for (i
= 0; direct_access_msrs
[i
].index
!= MSR_INVALID
; i
++) {
939 offset
= svm_msrpm_offset(direct_access_msrs
[i
].index
);
940 BUG_ON(offset
== MSR_INVALID
);
942 add_msr_offset(offset
);
946 static void svm_enable_lbrv(struct vcpu_svm
*svm
)
948 u32
*msrpm
= svm
->msrpm
;
950 svm
->vmcb
->control
.lbr_ctl
= 1;
951 set_msr_interception(msrpm
, MSR_IA32_LASTBRANCHFROMIP
, 1, 1);
952 set_msr_interception(msrpm
, MSR_IA32_LASTBRANCHTOIP
, 1, 1);
953 set_msr_interception(msrpm
, MSR_IA32_LASTINTFROMIP
, 1, 1);
954 set_msr_interception(msrpm
, MSR_IA32_LASTINTTOIP
, 1, 1);
957 static void svm_disable_lbrv(struct vcpu_svm
*svm
)
959 u32
*msrpm
= svm
->msrpm
;
961 svm
->vmcb
->control
.lbr_ctl
= 0;
962 set_msr_interception(msrpm
, MSR_IA32_LASTBRANCHFROMIP
, 0, 0);
963 set_msr_interception(msrpm
, MSR_IA32_LASTBRANCHTOIP
, 0, 0);
964 set_msr_interception(msrpm
, MSR_IA32_LASTINTFROMIP
, 0, 0);
965 set_msr_interception(msrpm
, MSR_IA32_LASTINTTOIP
, 0, 0);
969 * This hash table is used to map VM_ID to a struct kvm_arch,
970 * when handling AMD IOMMU GALOG notification to schedule in
973 #define SVM_VM_DATA_HASH_BITS 8
974 static DEFINE_HASHTABLE(svm_vm_data_hash
, SVM_VM_DATA_HASH_BITS
);
975 static DEFINE_SPINLOCK(svm_vm_data_hash_lock
);
978 * This function is called from IOMMU driver to notify
979 * SVM to schedule in a particular vCPU of a particular VM.
981 static int avic_ga_log_notifier(u32 ga_tag
)
984 struct kvm_arch
*ka
= NULL
;
985 struct kvm_vcpu
*vcpu
= NULL
;
986 u32 vm_id
= AVIC_GATAG_TO_VMID(ga_tag
);
987 u32 vcpu_id
= AVIC_GATAG_TO_VCPUID(ga_tag
);
989 pr_debug("SVM: %s: vm_id=%#x, vcpu_id=%#x\n", __func__
, vm_id
, vcpu_id
);
991 spin_lock_irqsave(&svm_vm_data_hash_lock
, flags
);
992 hash_for_each_possible(svm_vm_data_hash
, ka
, hnode
, vm_id
) {
993 struct kvm
*kvm
= container_of(ka
, struct kvm
, arch
);
994 struct kvm_arch
*vm_data
= &kvm
->arch
;
996 if (vm_data
->avic_vm_id
!= vm_id
)
998 vcpu
= kvm_get_vcpu_by_id(kvm
, vcpu_id
);
1001 spin_unlock_irqrestore(&svm_vm_data_hash_lock
, flags
);
1007 * At this point, the IOMMU should have already set the pending
1008 * bit in the vAPIC backing page. So, we just need to schedule
1011 if (vcpu
->mode
== OUTSIDE_GUEST_MODE
)
1012 kvm_vcpu_wake_up(vcpu
);
1017 static __init
int svm_hardware_setup(void)
1020 struct page
*iopm_pages
;
1024 iopm_pages
= alloc_pages(GFP_KERNEL
, IOPM_ALLOC_ORDER
);
1029 iopm_va
= page_address(iopm_pages
);
1030 memset(iopm_va
, 0xff, PAGE_SIZE
* (1 << IOPM_ALLOC_ORDER
));
1031 iopm_base
= page_to_pfn(iopm_pages
) << PAGE_SHIFT
;
1033 init_msrpm_offsets();
1035 if (boot_cpu_has(X86_FEATURE_NX
))
1036 kvm_enable_efer_bits(EFER_NX
);
1038 if (boot_cpu_has(X86_FEATURE_FXSR_OPT
))
1039 kvm_enable_efer_bits(EFER_FFXSR
);
1041 if (boot_cpu_has(X86_FEATURE_TSCRATEMSR
)) {
1042 kvm_has_tsc_control
= true;
1043 kvm_max_tsc_scaling_ratio
= TSC_RATIO_MAX
;
1044 kvm_tsc_scaling_ratio_frac_bits
= 32;
1048 printk(KERN_INFO
"kvm: Nested Virtualization enabled\n");
1049 kvm_enable_efer_bits(EFER_SVME
| EFER_LMSLE
);
1052 for_each_possible_cpu(cpu
) {
1053 r
= svm_cpu_init(cpu
);
1058 if (!boot_cpu_has(X86_FEATURE_NPT
))
1059 npt_enabled
= false;
1061 if (npt_enabled
&& !npt
) {
1062 printk(KERN_INFO
"kvm: Nested Paging disabled\n");
1063 npt_enabled
= false;
1067 printk(KERN_INFO
"kvm: Nested Paging enabled\n");
1074 !boot_cpu_has(X86_FEATURE_AVIC
) ||
1075 !IS_ENABLED(CONFIG_X86_LOCAL_APIC
)) {
1078 pr_info("AVIC enabled\n");
1080 amd_iommu_register_ga_log_notifier(&avic_ga_log_notifier
);
1087 __free_pages(iopm_pages
, IOPM_ALLOC_ORDER
);
1092 static __exit
void svm_hardware_unsetup(void)
1096 for_each_possible_cpu(cpu
)
1097 svm_cpu_uninit(cpu
);
1099 __free_pages(pfn_to_page(iopm_base
>> PAGE_SHIFT
), IOPM_ALLOC_ORDER
);
1103 static void init_seg(struct vmcb_seg
*seg
)
1106 seg
->attrib
= SVM_SELECTOR_P_MASK
| SVM_SELECTOR_S_MASK
|
1107 SVM_SELECTOR_WRITE_MASK
; /* Read/Write Data Segment */
1108 seg
->limit
= 0xffff;
1112 static void init_sys_seg(struct vmcb_seg
*seg
, uint32_t type
)
1115 seg
->attrib
= SVM_SELECTOR_P_MASK
| type
;
1116 seg
->limit
= 0xffff;
1120 static void svm_write_tsc_offset(struct kvm_vcpu
*vcpu
, u64 offset
)
1122 struct vcpu_svm
*svm
= to_svm(vcpu
);
1123 u64 g_tsc_offset
= 0;
1125 if (is_guest_mode(vcpu
)) {
1126 g_tsc_offset
= svm
->vmcb
->control
.tsc_offset
-
1127 svm
->nested
.hsave
->control
.tsc_offset
;
1128 svm
->nested
.hsave
->control
.tsc_offset
= offset
;
1130 trace_kvm_write_tsc_offset(vcpu
->vcpu_id
,
1131 svm
->vmcb
->control
.tsc_offset
,
1134 svm
->vmcb
->control
.tsc_offset
= offset
+ g_tsc_offset
;
1136 mark_dirty(svm
->vmcb
, VMCB_INTERCEPTS
);
1139 static void avic_init_vmcb(struct vcpu_svm
*svm
)
1141 struct vmcb
*vmcb
= svm
->vmcb
;
1142 struct kvm_arch
*vm_data
= &svm
->vcpu
.kvm
->arch
;
1143 phys_addr_t bpa
= page_to_phys(svm
->avic_backing_page
);
1144 phys_addr_t lpa
= page_to_phys(vm_data
->avic_logical_id_table_page
);
1145 phys_addr_t ppa
= page_to_phys(vm_data
->avic_physical_id_table_page
);
1147 vmcb
->control
.avic_backing_page
= bpa
& AVIC_HPA_MASK
;
1148 vmcb
->control
.avic_logical_id
= lpa
& AVIC_HPA_MASK
;
1149 vmcb
->control
.avic_physical_id
= ppa
& AVIC_HPA_MASK
;
1150 vmcb
->control
.avic_physical_id
|= AVIC_MAX_PHYSICAL_ID_COUNT
;
1151 vmcb
->control
.int_ctl
|= AVIC_ENABLE_MASK
;
1152 svm
->vcpu
.arch
.apicv_active
= true;
1155 static void init_vmcb(struct vcpu_svm
*svm
)
1157 struct vmcb_control_area
*control
= &svm
->vmcb
->control
;
1158 struct vmcb_save_area
*save
= &svm
->vmcb
->save
;
1160 svm
->vcpu
.arch
.hflags
= 0;
1162 set_cr_intercept(svm
, INTERCEPT_CR0_READ
);
1163 set_cr_intercept(svm
, INTERCEPT_CR3_READ
);
1164 set_cr_intercept(svm
, INTERCEPT_CR4_READ
);
1165 set_cr_intercept(svm
, INTERCEPT_CR0_WRITE
);
1166 set_cr_intercept(svm
, INTERCEPT_CR3_WRITE
);
1167 set_cr_intercept(svm
, INTERCEPT_CR4_WRITE
);
1168 if (!kvm_vcpu_apicv_active(&svm
->vcpu
))
1169 set_cr_intercept(svm
, INTERCEPT_CR8_WRITE
);
1171 set_dr_intercepts(svm
);
1173 set_exception_intercept(svm
, PF_VECTOR
);
1174 set_exception_intercept(svm
, UD_VECTOR
);
1175 set_exception_intercept(svm
, MC_VECTOR
);
1176 set_exception_intercept(svm
, AC_VECTOR
);
1177 set_exception_intercept(svm
, DB_VECTOR
);
1179 set_intercept(svm
, INTERCEPT_INTR
);
1180 set_intercept(svm
, INTERCEPT_NMI
);
1181 set_intercept(svm
, INTERCEPT_SMI
);
1182 set_intercept(svm
, INTERCEPT_SELECTIVE_CR0
);
1183 set_intercept(svm
, INTERCEPT_RDPMC
);
1184 set_intercept(svm
, INTERCEPT_CPUID
);
1185 set_intercept(svm
, INTERCEPT_INVD
);
1186 set_intercept(svm
, INTERCEPT_HLT
);
1187 set_intercept(svm
, INTERCEPT_INVLPG
);
1188 set_intercept(svm
, INTERCEPT_INVLPGA
);
1189 set_intercept(svm
, INTERCEPT_IOIO_PROT
);
1190 set_intercept(svm
, INTERCEPT_MSR_PROT
);
1191 set_intercept(svm
, INTERCEPT_TASK_SWITCH
);
1192 set_intercept(svm
, INTERCEPT_SHUTDOWN
);
1193 set_intercept(svm
, INTERCEPT_VMRUN
);
1194 set_intercept(svm
, INTERCEPT_VMMCALL
);
1195 set_intercept(svm
, INTERCEPT_VMLOAD
);
1196 set_intercept(svm
, INTERCEPT_VMSAVE
);
1197 set_intercept(svm
, INTERCEPT_STGI
);
1198 set_intercept(svm
, INTERCEPT_CLGI
);
1199 set_intercept(svm
, INTERCEPT_SKINIT
);
1200 set_intercept(svm
, INTERCEPT_WBINVD
);
1201 set_intercept(svm
, INTERCEPT_MONITOR
);
1202 set_intercept(svm
, INTERCEPT_MWAIT
);
1203 set_intercept(svm
, INTERCEPT_XSETBV
);
1205 control
->iopm_base_pa
= iopm_base
;
1206 control
->msrpm_base_pa
= __pa(svm
->msrpm
);
1207 control
->int_ctl
= V_INTR_MASKING_MASK
;
1209 init_seg(&save
->es
);
1210 init_seg(&save
->ss
);
1211 init_seg(&save
->ds
);
1212 init_seg(&save
->fs
);
1213 init_seg(&save
->gs
);
1215 save
->cs
.selector
= 0xf000;
1216 save
->cs
.base
= 0xffff0000;
1217 /* Executable/Readable Code Segment */
1218 save
->cs
.attrib
= SVM_SELECTOR_READ_MASK
| SVM_SELECTOR_P_MASK
|
1219 SVM_SELECTOR_S_MASK
| SVM_SELECTOR_CODE_MASK
;
1220 save
->cs
.limit
= 0xffff;
1222 save
->gdtr
.limit
= 0xffff;
1223 save
->idtr
.limit
= 0xffff;
1225 init_sys_seg(&save
->ldtr
, SEG_TYPE_LDT
);
1226 init_sys_seg(&save
->tr
, SEG_TYPE_BUSY_TSS16
);
1228 svm_set_efer(&svm
->vcpu
, 0);
1229 save
->dr6
= 0xffff0ff0;
1230 kvm_set_rflags(&svm
->vcpu
, 2);
1231 save
->rip
= 0x0000fff0;
1232 svm
->vcpu
.arch
.regs
[VCPU_REGS_RIP
] = save
->rip
;
1235 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
1236 * It also updates the guest-visible cr0 value.
1238 svm_set_cr0(&svm
->vcpu
, X86_CR0_NW
| X86_CR0_CD
| X86_CR0_ET
);
1239 kvm_mmu_reset_context(&svm
->vcpu
);
1241 save
->cr4
= X86_CR4_PAE
;
1245 /* Setup VMCB for Nested Paging */
1246 control
->nested_ctl
= 1;
1247 clr_intercept(svm
, INTERCEPT_INVLPG
);
1248 clr_exception_intercept(svm
, PF_VECTOR
);
1249 clr_cr_intercept(svm
, INTERCEPT_CR3_READ
);
1250 clr_cr_intercept(svm
, INTERCEPT_CR3_WRITE
);
1251 save
->g_pat
= svm
->vcpu
.arch
.pat
;
1255 svm
->asid_generation
= 0;
1257 svm
->nested
.vmcb
= 0;
1258 svm
->vcpu
.arch
.hflags
= 0;
1260 if (boot_cpu_has(X86_FEATURE_PAUSEFILTER
)) {
1261 control
->pause_filter_count
= 3000;
1262 set_intercept(svm
, INTERCEPT_PAUSE
);
1266 avic_init_vmcb(svm
);
1268 mark_all_dirty(svm
->vmcb
);
1274 static u64
*avic_get_physical_id_entry(struct kvm_vcpu
*vcpu
, int index
)
1276 u64
*avic_physical_id_table
;
1277 struct kvm_arch
*vm_data
= &vcpu
->kvm
->arch
;
1279 if (index
>= AVIC_MAX_PHYSICAL_ID_COUNT
)
1282 avic_physical_id_table
= page_address(vm_data
->avic_physical_id_table_page
);
1284 return &avic_physical_id_table
[index
];
1289 * AVIC hardware walks the nested page table to check permissions,
1290 * but does not use the SPA address specified in the leaf page
1291 * table entry since it uses address in the AVIC_BACKING_PAGE pointer
1292 * field of the VMCB. Therefore, we set up the
1293 * APIC_ACCESS_PAGE_PRIVATE_MEMSLOT (4KB) here.
1295 static int avic_init_access_page(struct kvm_vcpu
*vcpu
)
1297 struct kvm
*kvm
= vcpu
->kvm
;
1300 if (kvm
->arch
.apic_access_page_done
)
1303 ret
= x86_set_memory_region(kvm
,
1304 APIC_ACCESS_PAGE_PRIVATE_MEMSLOT
,
1305 APIC_DEFAULT_PHYS_BASE
,
1310 kvm
->arch
.apic_access_page_done
= true;
1314 static int avic_init_backing_page(struct kvm_vcpu
*vcpu
)
1317 u64
*entry
, new_entry
;
1318 int id
= vcpu
->vcpu_id
;
1319 struct vcpu_svm
*svm
= to_svm(vcpu
);
1321 ret
= avic_init_access_page(vcpu
);
1325 if (id
>= AVIC_MAX_PHYSICAL_ID_COUNT
)
1328 if (!svm
->vcpu
.arch
.apic
->regs
)
1331 svm
->avic_backing_page
= virt_to_page(svm
->vcpu
.arch
.apic
->regs
);
1333 /* Setting AVIC backing page address in the phy APIC ID table */
1334 entry
= avic_get_physical_id_entry(vcpu
, id
);
1338 new_entry
= READ_ONCE(*entry
);
1339 new_entry
= (page_to_phys(svm
->avic_backing_page
) &
1340 AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK
) |
1341 AVIC_PHYSICAL_ID_ENTRY_VALID_MASK
;
1342 WRITE_ONCE(*entry
, new_entry
);
1344 svm
->avic_physical_id_cache
= entry
;
1349 static inline int avic_get_next_vm_id(void)
1353 spin_lock(&avic_vm_id_lock
);
1355 /* AVIC VM ID is one-based. */
1356 id
= find_next_zero_bit(avic_vm_id_bitmap
, AVIC_VM_ID_NR
, 1);
1357 if (id
<= AVIC_VM_ID_MASK
)
1358 __set_bit(id
, avic_vm_id_bitmap
);
1362 spin_unlock(&avic_vm_id_lock
);
1366 static inline int avic_free_vm_id(int id
)
1368 if (id
<= 0 || id
> AVIC_VM_ID_MASK
)
1371 spin_lock(&avic_vm_id_lock
);
1372 __clear_bit(id
, avic_vm_id_bitmap
);
1373 spin_unlock(&avic_vm_id_lock
);
1377 static void avic_vm_destroy(struct kvm
*kvm
)
1379 unsigned long flags
;
1380 struct kvm_arch
*vm_data
= &kvm
->arch
;
1382 avic_free_vm_id(vm_data
->avic_vm_id
);
1384 if (vm_data
->avic_logical_id_table_page
)
1385 __free_page(vm_data
->avic_logical_id_table_page
);
1386 if (vm_data
->avic_physical_id_table_page
)
1387 __free_page(vm_data
->avic_physical_id_table_page
);
1389 spin_lock_irqsave(&svm_vm_data_hash_lock
, flags
);
1390 hash_del(&vm_data
->hnode
);
1391 spin_unlock_irqrestore(&svm_vm_data_hash_lock
, flags
);
1394 static int avic_vm_init(struct kvm
*kvm
)
1396 unsigned long flags
;
1397 int vm_id
, err
= -ENOMEM
;
1398 struct kvm_arch
*vm_data
= &kvm
->arch
;
1399 struct page
*p_page
;
1400 struct page
*l_page
;
1405 vm_id
= avic_get_next_vm_id();
1408 vm_data
->avic_vm_id
= (u32
)vm_id
;
1410 /* Allocating physical APIC ID table (4KB) */
1411 p_page
= alloc_page(GFP_KERNEL
);
1415 vm_data
->avic_physical_id_table_page
= p_page
;
1416 clear_page(page_address(p_page
));
1418 /* Allocating logical APIC ID table (4KB) */
1419 l_page
= alloc_page(GFP_KERNEL
);
1423 vm_data
->avic_logical_id_table_page
= l_page
;
1424 clear_page(page_address(l_page
));
1426 spin_lock_irqsave(&svm_vm_data_hash_lock
, flags
);
1427 hash_add(svm_vm_data_hash
, &vm_data
->hnode
, vm_data
->avic_vm_id
);
1428 spin_unlock_irqrestore(&svm_vm_data_hash_lock
, flags
);
1433 avic_vm_destroy(kvm
);
1438 avic_update_iommu_vcpu_affinity(struct kvm_vcpu
*vcpu
, int cpu
, bool r
)
1441 unsigned long flags
;
1442 struct amd_svm_iommu_ir
*ir
;
1443 struct vcpu_svm
*svm
= to_svm(vcpu
);
1445 if (!kvm_arch_has_assigned_device(vcpu
->kvm
))
1449 * Here, we go through the per-vcpu ir_list to update all existing
1450 * interrupt remapping table entry targeting this vcpu.
1452 spin_lock_irqsave(&svm
->ir_list_lock
, flags
);
1454 if (list_empty(&svm
->ir_list
))
1457 list_for_each_entry(ir
, &svm
->ir_list
, node
) {
1458 ret
= amd_iommu_update_ga(cpu
, r
, ir
->data
);
1463 spin_unlock_irqrestore(&svm
->ir_list_lock
, flags
);
1467 static void avic_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
1470 /* ID = 0xff (broadcast), ID > 0xff (reserved) */
1471 int h_physical_id
= kvm_cpu_get_apicid(cpu
);
1472 struct vcpu_svm
*svm
= to_svm(vcpu
);
1474 if (!kvm_vcpu_apicv_active(vcpu
))
1477 if (WARN_ON(h_physical_id
>= AVIC_MAX_PHYSICAL_ID_COUNT
))
1480 entry
= READ_ONCE(*(svm
->avic_physical_id_cache
));
1481 WARN_ON(entry
& AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK
);
1483 entry
&= ~AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK
;
1484 entry
|= (h_physical_id
& AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK
);
1486 entry
&= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK
;
1487 if (svm
->avic_is_running
)
1488 entry
|= AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK
;
1490 WRITE_ONCE(*(svm
->avic_physical_id_cache
), entry
);
1491 avic_update_iommu_vcpu_affinity(vcpu
, h_physical_id
,
1492 svm
->avic_is_running
);
1495 static void avic_vcpu_put(struct kvm_vcpu
*vcpu
)
1498 struct vcpu_svm
*svm
= to_svm(vcpu
);
1500 if (!kvm_vcpu_apicv_active(vcpu
))
1503 entry
= READ_ONCE(*(svm
->avic_physical_id_cache
));
1504 if (entry
& AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK
)
1505 avic_update_iommu_vcpu_affinity(vcpu
, -1, 0);
1507 entry
&= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK
;
1508 WRITE_ONCE(*(svm
->avic_physical_id_cache
), entry
);
1512 * This function is called during VCPU halt/unhalt.
1514 static void avic_set_running(struct kvm_vcpu
*vcpu
, bool is_run
)
1516 struct vcpu_svm
*svm
= to_svm(vcpu
);
1518 svm
->avic_is_running
= is_run
;
1520 avic_vcpu_load(vcpu
, vcpu
->cpu
);
1522 avic_vcpu_put(vcpu
);
1525 static void svm_vcpu_reset(struct kvm_vcpu
*vcpu
, bool init_event
)
1527 struct vcpu_svm
*svm
= to_svm(vcpu
);
1532 svm
->vcpu
.arch
.apic_base
= APIC_DEFAULT_PHYS_BASE
|
1533 MSR_IA32_APICBASE_ENABLE
;
1534 if (kvm_vcpu_is_reset_bsp(&svm
->vcpu
))
1535 svm
->vcpu
.arch
.apic_base
|= MSR_IA32_APICBASE_BSP
;
1539 kvm_cpuid(vcpu
, &eax
, &dummy
, &dummy
, &dummy
);
1540 kvm_register_write(vcpu
, VCPU_REGS_RDX
, eax
);
1542 if (kvm_vcpu_apicv_active(vcpu
) && !init_event
)
1543 avic_update_vapic_bar(svm
, APIC_DEFAULT_PHYS_BASE
);
1546 static struct kvm_vcpu
*svm_create_vcpu(struct kvm
*kvm
, unsigned int id
)
1548 struct vcpu_svm
*svm
;
1550 struct page
*msrpm_pages
;
1551 struct page
*hsave_page
;
1552 struct page
*nested_msrpm_pages
;
1555 svm
= kmem_cache_zalloc(kvm_vcpu_cache
, GFP_KERNEL
);
1561 err
= kvm_vcpu_init(&svm
->vcpu
, kvm
, id
);
1566 page
= alloc_page(GFP_KERNEL
);
1570 msrpm_pages
= alloc_pages(GFP_KERNEL
, MSRPM_ALLOC_ORDER
);
1574 nested_msrpm_pages
= alloc_pages(GFP_KERNEL
, MSRPM_ALLOC_ORDER
);
1575 if (!nested_msrpm_pages
)
1578 hsave_page
= alloc_page(GFP_KERNEL
);
1583 err
= avic_init_backing_page(&svm
->vcpu
);
1587 INIT_LIST_HEAD(&svm
->ir_list
);
1588 spin_lock_init(&svm
->ir_list_lock
);
1591 /* We initialize this flag to true to make sure that the is_running
1592 * bit would be set the first time the vcpu is loaded.
1594 svm
->avic_is_running
= true;
1596 svm
->nested
.hsave
= page_address(hsave_page
);
1598 svm
->msrpm
= page_address(msrpm_pages
);
1599 svm_vcpu_init_msrpm(svm
->msrpm
);
1601 svm
->nested
.msrpm
= page_address(nested_msrpm_pages
);
1602 svm_vcpu_init_msrpm(svm
->nested
.msrpm
);
1604 svm
->vmcb
= page_address(page
);
1605 clear_page(svm
->vmcb
);
1606 svm
->vmcb_pa
= page_to_pfn(page
) << PAGE_SHIFT
;
1607 svm
->asid_generation
= 0;
1610 svm_init_osvw(&svm
->vcpu
);
1615 __free_page(hsave_page
);
1617 __free_pages(nested_msrpm_pages
, MSRPM_ALLOC_ORDER
);
1619 __free_pages(msrpm_pages
, MSRPM_ALLOC_ORDER
);
1623 kvm_vcpu_uninit(&svm
->vcpu
);
1625 kmem_cache_free(kvm_vcpu_cache
, svm
);
1627 return ERR_PTR(err
);
1630 static void svm_free_vcpu(struct kvm_vcpu
*vcpu
)
1632 struct vcpu_svm
*svm
= to_svm(vcpu
);
1634 __free_page(pfn_to_page(svm
->vmcb_pa
>> PAGE_SHIFT
));
1635 __free_pages(virt_to_page(svm
->msrpm
), MSRPM_ALLOC_ORDER
);
1636 __free_page(virt_to_page(svm
->nested
.hsave
));
1637 __free_pages(virt_to_page(svm
->nested
.msrpm
), MSRPM_ALLOC_ORDER
);
1638 kvm_vcpu_uninit(vcpu
);
1639 kmem_cache_free(kvm_vcpu_cache
, svm
);
1642 static void svm_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
1644 struct vcpu_svm
*svm
= to_svm(vcpu
);
1647 if (unlikely(cpu
!= vcpu
->cpu
)) {
1648 svm
->asid_generation
= 0;
1649 mark_all_dirty(svm
->vmcb
);
1652 #ifdef CONFIG_X86_64
1653 rdmsrl(MSR_GS_BASE
, to_svm(vcpu
)->host
.gs_base
);
1655 savesegment(fs
, svm
->host
.fs
);
1656 savesegment(gs
, svm
->host
.gs
);
1657 svm
->host
.ldt
= kvm_read_ldt();
1659 for (i
= 0; i
< NR_HOST_SAVE_USER_MSRS
; i
++)
1660 rdmsrl(host_save_user_msrs
[i
], svm
->host_user_msrs
[i
]);
1662 if (static_cpu_has(X86_FEATURE_TSCRATEMSR
)) {
1663 u64 tsc_ratio
= vcpu
->arch
.tsc_scaling_ratio
;
1664 if (tsc_ratio
!= __this_cpu_read(current_tsc_ratio
)) {
1665 __this_cpu_write(current_tsc_ratio
, tsc_ratio
);
1666 wrmsrl(MSR_AMD64_TSC_RATIO
, tsc_ratio
);
1669 /* This assumes that the kernel never uses MSR_TSC_AUX */
1670 if (static_cpu_has(X86_FEATURE_RDTSCP
))
1671 wrmsrl(MSR_TSC_AUX
, svm
->tsc_aux
);
1673 avic_vcpu_load(vcpu
, cpu
);
1676 static void svm_vcpu_put(struct kvm_vcpu
*vcpu
)
1678 struct vcpu_svm
*svm
= to_svm(vcpu
);
1681 avic_vcpu_put(vcpu
);
1683 ++vcpu
->stat
.host_state_reload
;
1684 kvm_load_ldt(svm
->host
.ldt
);
1685 #ifdef CONFIG_X86_64
1686 loadsegment(fs
, svm
->host
.fs
);
1687 wrmsrl(MSR_KERNEL_GS_BASE
, current
->thread
.gsbase
);
1688 load_gs_index(svm
->host
.gs
);
1690 #ifdef CONFIG_X86_32_LAZY_GS
1691 loadsegment(gs
, svm
->host
.gs
);
1694 for (i
= 0; i
< NR_HOST_SAVE_USER_MSRS
; i
++)
1695 wrmsrl(host_save_user_msrs
[i
], svm
->host_user_msrs
[i
]);
1698 static void svm_vcpu_blocking(struct kvm_vcpu
*vcpu
)
1700 avic_set_running(vcpu
, false);
1703 static void svm_vcpu_unblocking(struct kvm_vcpu
*vcpu
)
1705 avic_set_running(vcpu
, true);
1708 static unsigned long svm_get_rflags(struct kvm_vcpu
*vcpu
)
1710 return to_svm(vcpu
)->vmcb
->save
.rflags
;
1713 static void svm_set_rflags(struct kvm_vcpu
*vcpu
, unsigned long rflags
)
1716 * Any change of EFLAGS.VM is accompanied by a reload of SS
1717 * (caused by either a task switch or an inter-privilege IRET),
1718 * so we do not need to update the CPL here.
1720 to_svm(vcpu
)->vmcb
->save
.rflags
= rflags
;
1723 static u32
svm_get_pkru(struct kvm_vcpu
*vcpu
)
1728 static void svm_cache_reg(struct kvm_vcpu
*vcpu
, enum kvm_reg reg
)
1731 case VCPU_EXREG_PDPTR
:
1732 BUG_ON(!npt_enabled
);
1733 load_pdptrs(vcpu
, vcpu
->arch
.walk_mmu
, kvm_read_cr3(vcpu
));
1740 static void svm_set_vintr(struct vcpu_svm
*svm
)
1742 set_intercept(svm
, INTERCEPT_VINTR
);
1745 static void svm_clear_vintr(struct vcpu_svm
*svm
)
1747 clr_intercept(svm
, INTERCEPT_VINTR
);
1750 static struct vmcb_seg
*svm_seg(struct kvm_vcpu
*vcpu
, int seg
)
1752 struct vmcb_save_area
*save
= &to_svm(vcpu
)->vmcb
->save
;
1755 case VCPU_SREG_CS
: return &save
->cs
;
1756 case VCPU_SREG_DS
: return &save
->ds
;
1757 case VCPU_SREG_ES
: return &save
->es
;
1758 case VCPU_SREG_FS
: return &save
->fs
;
1759 case VCPU_SREG_GS
: return &save
->gs
;
1760 case VCPU_SREG_SS
: return &save
->ss
;
1761 case VCPU_SREG_TR
: return &save
->tr
;
1762 case VCPU_SREG_LDTR
: return &save
->ldtr
;
1768 static u64
svm_get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
1770 struct vmcb_seg
*s
= svm_seg(vcpu
, seg
);
1775 static void svm_get_segment(struct kvm_vcpu
*vcpu
,
1776 struct kvm_segment
*var
, int seg
)
1778 struct vmcb_seg
*s
= svm_seg(vcpu
, seg
);
1780 var
->base
= s
->base
;
1781 var
->limit
= s
->limit
;
1782 var
->selector
= s
->selector
;
1783 var
->type
= s
->attrib
& SVM_SELECTOR_TYPE_MASK
;
1784 var
->s
= (s
->attrib
>> SVM_SELECTOR_S_SHIFT
) & 1;
1785 var
->dpl
= (s
->attrib
>> SVM_SELECTOR_DPL_SHIFT
) & 3;
1786 var
->present
= (s
->attrib
>> SVM_SELECTOR_P_SHIFT
) & 1;
1787 var
->avl
= (s
->attrib
>> SVM_SELECTOR_AVL_SHIFT
) & 1;
1788 var
->l
= (s
->attrib
>> SVM_SELECTOR_L_SHIFT
) & 1;
1789 var
->db
= (s
->attrib
>> SVM_SELECTOR_DB_SHIFT
) & 1;
1792 * AMD CPUs circa 2014 track the G bit for all segments except CS.
1793 * However, the SVM spec states that the G bit is not observed by the
1794 * CPU, and some VMware virtual CPUs drop the G bit for all segments.
1795 * So let's synthesize a legal G bit for all segments, this helps
1796 * running KVM nested. It also helps cross-vendor migration, because
1797 * Intel's vmentry has a check on the 'G' bit.
1799 var
->g
= s
->limit
> 0xfffff;
1802 * AMD's VMCB does not have an explicit unusable field, so emulate it
1803 * for cross vendor migration purposes by "not present"
1805 var
->unusable
= !var
->present
|| (var
->type
== 0);
1810 * Work around a bug where the busy flag in the tr selector
1820 * The accessed bit must always be set in the segment
1821 * descriptor cache, although it can be cleared in the
1822 * descriptor, the cached bit always remains at 1. Since
1823 * Intel has a check on this, set it here to support
1824 * cross-vendor migration.
1831 * On AMD CPUs sometimes the DB bit in the segment
1832 * descriptor is left as 1, although the whole segment has
1833 * been made unusable. Clear it here to pass an Intel VMX
1834 * entry check when cross vendor migrating.
1838 var
->dpl
= to_svm(vcpu
)->vmcb
->save
.cpl
;
1843 static int svm_get_cpl(struct kvm_vcpu
*vcpu
)
1845 struct vmcb_save_area
*save
= &to_svm(vcpu
)->vmcb
->save
;
1850 static void svm_get_idt(struct kvm_vcpu
*vcpu
, struct desc_ptr
*dt
)
1852 struct vcpu_svm
*svm
= to_svm(vcpu
);
1854 dt
->size
= svm
->vmcb
->save
.idtr
.limit
;
1855 dt
->address
= svm
->vmcb
->save
.idtr
.base
;
1858 static void svm_set_idt(struct kvm_vcpu
*vcpu
, struct desc_ptr
*dt
)
1860 struct vcpu_svm
*svm
= to_svm(vcpu
);
1862 svm
->vmcb
->save
.idtr
.limit
= dt
->size
;
1863 svm
->vmcb
->save
.idtr
.base
= dt
->address
;
1864 mark_dirty(svm
->vmcb
, VMCB_DT
);
1867 static void svm_get_gdt(struct kvm_vcpu
*vcpu
, struct desc_ptr
*dt
)
1869 struct vcpu_svm
*svm
= to_svm(vcpu
);
1871 dt
->size
= svm
->vmcb
->save
.gdtr
.limit
;
1872 dt
->address
= svm
->vmcb
->save
.gdtr
.base
;
1875 static void svm_set_gdt(struct kvm_vcpu
*vcpu
, struct desc_ptr
*dt
)
1877 struct vcpu_svm
*svm
= to_svm(vcpu
);
1879 svm
->vmcb
->save
.gdtr
.limit
= dt
->size
;
1880 svm
->vmcb
->save
.gdtr
.base
= dt
->address
;
1881 mark_dirty(svm
->vmcb
, VMCB_DT
);
1884 static void svm_decache_cr0_guest_bits(struct kvm_vcpu
*vcpu
)
1888 static void svm_decache_cr3(struct kvm_vcpu
*vcpu
)
1892 static void svm_decache_cr4_guest_bits(struct kvm_vcpu
*vcpu
)
1896 static void update_cr0_intercept(struct vcpu_svm
*svm
)
1898 ulong gcr0
= svm
->vcpu
.arch
.cr0
;
1899 u64
*hcr0
= &svm
->vmcb
->save
.cr0
;
1901 *hcr0
= (*hcr0
& ~SVM_CR0_SELECTIVE_MASK
)
1902 | (gcr0
& SVM_CR0_SELECTIVE_MASK
);
1904 mark_dirty(svm
->vmcb
, VMCB_CR
);
1906 if (gcr0
== *hcr0
) {
1907 clr_cr_intercept(svm
, INTERCEPT_CR0_READ
);
1908 clr_cr_intercept(svm
, INTERCEPT_CR0_WRITE
);
1910 set_cr_intercept(svm
, INTERCEPT_CR0_READ
);
1911 set_cr_intercept(svm
, INTERCEPT_CR0_WRITE
);
1915 static void svm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
1917 struct vcpu_svm
*svm
= to_svm(vcpu
);
1919 #ifdef CONFIG_X86_64
1920 if (vcpu
->arch
.efer
& EFER_LME
) {
1921 if (!is_paging(vcpu
) && (cr0
& X86_CR0_PG
)) {
1922 vcpu
->arch
.efer
|= EFER_LMA
;
1923 svm
->vmcb
->save
.efer
|= EFER_LMA
| EFER_LME
;
1926 if (is_paging(vcpu
) && !(cr0
& X86_CR0_PG
)) {
1927 vcpu
->arch
.efer
&= ~EFER_LMA
;
1928 svm
->vmcb
->save
.efer
&= ~(EFER_LMA
| EFER_LME
);
1932 vcpu
->arch
.cr0
= cr0
;
1935 cr0
|= X86_CR0_PG
| X86_CR0_WP
;
1938 * re-enable caching here because the QEMU bios
1939 * does not do it - this results in some delay at
1942 if (kvm_check_has_quirk(vcpu
->kvm
, KVM_X86_QUIRK_CD_NW_CLEARED
))
1943 cr0
&= ~(X86_CR0_CD
| X86_CR0_NW
);
1944 svm
->vmcb
->save
.cr0
= cr0
;
1945 mark_dirty(svm
->vmcb
, VMCB_CR
);
1946 update_cr0_intercept(svm
);
1949 static int svm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
1951 unsigned long host_cr4_mce
= cr4_read_shadow() & X86_CR4_MCE
;
1952 unsigned long old_cr4
= to_svm(vcpu
)->vmcb
->save
.cr4
;
1954 if (cr4
& X86_CR4_VMXE
)
1957 if (npt_enabled
&& ((old_cr4
^ cr4
) & X86_CR4_PGE
))
1958 svm_flush_tlb(vcpu
);
1960 vcpu
->arch
.cr4
= cr4
;
1963 cr4
|= host_cr4_mce
;
1964 to_svm(vcpu
)->vmcb
->save
.cr4
= cr4
;
1965 mark_dirty(to_svm(vcpu
)->vmcb
, VMCB_CR
);
1969 static void svm_set_segment(struct kvm_vcpu
*vcpu
,
1970 struct kvm_segment
*var
, int seg
)
1972 struct vcpu_svm
*svm
= to_svm(vcpu
);
1973 struct vmcb_seg
*s
= svm_seg(vcpu
, seg
);
1975 s
->base
= var
->base
;
1976 s
->limit
= var
->limit
;
1977 s
->selector
= var
->selector
;
1981 s
->attrib
= (var
->type
& SVM_SELECTOR_TYPE_MASK
);
1982 s
->attrib
|= (var
->s
& 1) << SVM_SELECTOR_S_SHIFT
;
1983 s
->attrib
|= (var
->dpl
& 3) << SVM_SELECTOR_DPL_SHIFT
;
1984 s
->attrib
|= (var
->present
& 1) << SVM_SELECTOR_P_SHIFT
;
1985 s
->attrib
|= (var
->avl
& 1) << SVM_SELECTOR_AVL_SHIFT
;
1986 s
->attrib
|= (var
->l
& 1) << SVM_SELECTOR_L_SHIFT
;
1987 s
->attrib
|= (var
->db
& 1) << SVM_SELECTOR_DB_SHIFT
;
1988 s
->attrib
|= (var
->g
& 1) << SVM_SELECTOR_G_SHIFT
;
1992 * This is always accurate, except if SYSRET returned to a segment
1993 * with SS.DPL != 3. Intel does not have this quirk, and always
1994 * forces SS.DPL to 3 on sysret, so we ignore that case; fixing it
1995 * would entail passing the CPL to userspace and back.
1997 if (seg
== VCPU_SREG_SS
)
1998 svm
->vmcb
->save
.cpl
= (s
->attrib
>> SVM_SELECTOR_DPL_SHIFT
) & 3;
2000 mark_dirty(svm
->vmcb
, VMCB_SEG
);
2003 static void update_bp_intercept(struct kvm_vcpu
*vcpu
)
2005 struct vcpu_svm
*svm
= to_svm(vcpu
);
2007 clr_exception_intercept(svm
, BP_VECTOR
);
2009 if (vcpu
->guest_debug
& KVM_GUESTDBG_ENABLE
) {
2010 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_SW_BP
)
2011 set_exception_intercept(svm
, BP_VECTOR
);
2013 vcpu
->guest_debug
= 0;
2016 static void new_asid(struct vcpu_svm
*svm
, struct svm_cpu_data
*sd
)
2018 if (sd
->next_asid
> sd
->max_asid
) {
2019 ++sd
->asid_generation
;
2021 svm
->vmcb
->control
.tlb_ctl
= TLB_CONTROL_FLUSH_ALL_ASID
;
2024 svm
->asid_generation
= sd
->asid_generation
;
2025 svm
->vmcb
->control
.asid
= sd
->next_asid
++;
2027 mark_dirty(svm
->vmcb
, VMCB_ASID
);
2030 static u64
svm_get_dr6(struct kvm_vcpu
*vcpu
)
2032 return to_svm(vcpu
)->vmcb
->save
.dr6
;
2035 static void svm_set_dr6(struct kvm_vcpu
*vcpu
, unsigned long value
)
2037 struct vcpu_svm
*svm
= to_svm(vcpu
);
2039 svm
->vmcb
->save
.dr6
= value
;
2040 mark_dirty(svm
->vmcb
, VMCB_DR
);
2043 static void svm_sync_dirty_debug_regs(struct kvm_vcpu
*vcpu
)
2045 struct vcpu_svm
*svm
= to_svm(vcpu
);
2047 get_debugreg(vcpu
->arch
.db
[0], 0);
2048 get_debugreg(vcpu
->arch
.db
[1], 1);
2049 get_debugreg(vcpu
->arch
.db
[2], 2);
2050 get_debugreg(vcpu
->arch
.db
[3], 3);
2051 vcpu
->arch
.dr6
= svm_get_dr6(vcpu
);
2052 vcpu
->arch
.dr7
= svm
->vmcb
->save
.dr7
;
2054 vcpu
->arch
.switch_db_regs
&= ~KVM_DEBUGREG_WONT_EXIT
;
2055 set_dr_intercepts(svm
);
2058 static void svm_set_dr7(struct kvm_vcpu
*vcpu
, unsigned long value
)
2060 struct vcpu_svm
*svm
= to_svm(vcpu
);
2062 svm
->vmcb
->save
.dr7
= value
;
2063 mark_dirty(svm
->vmcb
, VMCB_DR
);
2066 static int pf_interception(struct vcpu_svm
*svm
)
2068 u64 fault_address
= svm
->vmcb
->control
.exit_info_2
;
2072 switch (svm
->apf_reason
) {
2074 error_code
= svm
->vmcb
->control
.exit_info_1
;
2076 trace_kvm_page_fault(fault_address
, error_code
);
2077 if (!npt_enabled
&& kvm_event_needs_reinjection(&svm
->vcpu
))
2078 kvm_mmu_unprotect_page_virt(&svm
->vcpu
, fault_address
);
2079 r
= kvm_mmu_page_fault(&svm
->vcpu
, fault_address
, error_code
,
2080 svm
->vmcb
->control
.insn_bytes
,
2081 svm
->vmcb
->control
.insn_len
);
2083 case KVM_PV_REASON_PAGE_NOT_PRESENT
:
2084 svm
->apf_reason
= 0;
2085 local_irq_disable();
2086 kvm_async_pf_task_wait(fault_address
);
2089 case KVM_PV_REASON_PAGE_READY
:
2090 svm
->apf_reason
= 0;
2091 local_irq_disable();
2092 kvm_async_pf_task_wake(fault_address
);
2099 static int db_interception(struct vcpu_svm
*svm
)
2101 struct kvm_run
*kvm_run
= svm
->vcpu
.run
;
2103 if (!(svm
->vcpu
.guest_debug
&
2104 (KVM_GUESTDBG_SINGLESTEP
| KVM_GUESTDBG_USE_HW_BP
)) &&
2105 !svm
->nmi_singlestep
) {
2106 kvm_queue_exception(&svm
->vcpu
, DB_VECTOR
);
2110 if (svm
->nmi_singlestep
) {
2111 svm
->nmi_singlestep
= false;
2112 if (!(svm
->vcpu
.guest_debug
& KVM_GUESTDBG_SINGLESTEP
))
2113 svm
->vmcb
->save
.rflags
&=
2114 ~(X86_EFLAGS_TF
| X86_EFLAGS_RF
);
2117 if (svm
->vcpu
.guest_debug
&
2118 (KVM_GUESTDBG_SINGLESTEP
| KVM_GUESTDBG_USE_HW_BP
)) {
2119 kvm_run
->exit_reason
= KVM_EXIT_DEBUG
;
2120 kvm_run
->debug
.arch
.pc
=
2121 svm
->vmcb
->save
.cs
.base
+ svm
->vmcb
->save
.rip
;
2122 kvm_run
->debug
.arch
.exception
= DB_VECTOR
;
2129 static int bp_interception(struct vcpu_svm
*svm
)
2131 struct kvm_run
*kvm_run
= svm
->vcpu
.run
;
2133 kvm_run
->exit_reason
= KVM_EXIT_DEBUG
;
2134 kvm_run
->debug
.arch
.pc
= svm
->vmcb
->save
.cs
.base
+ svm
->vmcb
->save
.rip
;
2135 kvm_run
->debug
.arch
.exception
= BP_VECTOR
;
2139 static int ud_interception(struct vcpu_svm
*svm
)
2143 er
= emulate_instruction(&svm
->vcpu
, EMULTYPE_TRAP_UD
);
2144 if (er
!= EMULATE_DONE
)
2145 kvm_queue_exception(&svm
->vcpu
, UD_VECTOR
);
2149 static int ac_interception(struct vcpu_svm
*svm
)
2151 kvm_queue_exception_e(&svm
->vcpu
, AC_VECTOR
, 0);
2155 static bool is_erratum_383(void)
2160 if (!erratum_383_found
)
2163 value
= native_read_msr_safe(MSR_IA32_MC0_STATUS
, &err
);
2167 /* Bit 62 may or may not be set for this mce */
2168 value
&= ~(1ULL << 62);
2170 if (value
!= 0xb600000000010015ULL
)
2173 /* Clear MCi_STATUS registers */
2174 for (i
= 0; i
< 6; ++i
)
2175 native_write_msr_safe(MSR_IA32_MCx_STATUS(i
), 0, 0);
2177 value
= native_read_msr_safe(MSR_IA32_MCG_STATUS
, &err
);
2181 value
&= ~(1ULL << 2);
2182 low
= lower_32_bits(value
);
2183 high
= upper_32_bits(value
);
2185 native_write_msr_safe(MSR_IA32_MCG_STATUS
, low
, high
);
2188 /* Flush tlb to evict multi-match entries */
2194 static void svm_handle_mce(struct vcpu_svm
*svm
)
2196 if (is_erratum_383()) {
2198 * Erratum 383 triggered. Guest state is corrupt so kill the
2201 pr_err("KVM: Guest triggered AMD Erratum 383\n");
2203 kvm_make_request(KVM_REQ_TRIPLE_FAULT
, &svm
->vcpu
);
2209 * On an #MC intercept the MCE handler is not called automatically in
2210 * the host. So do it by hand here.
2214 /* not sure if we ever come back to this point */
2219 static int mc_interception(struct vcpu_svm
*svm
)
2224 static int shutdown_interception(struct vcpu_svm
*svm
)
2226 struct kvm_run
*kvm_run
= svm
->vcpu
.run
;
2229 * VMCB is undefined after a SHUTDOWN intercept
2230 * so reinitialize it.
2232 clear_page(svm
->vmcb
);
2235 kvm_run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
2239 static int io_interception(struct vcpu_svm
*svm
)
2241 struct kvm_vcpu
*vcpu
= &svm
->vcpu
;
2242 u32 io_info
= svm
->vmcb
->control
.exit_info_1
; /* address size bug? */
2243 int size
, in
, string
;
2246 ++svm
->vcpu
.stat
.io_exits
;
2247 string
= (io_info
& SVM_IOIO_STR_MASK
) != 0;
2248 in
= (io_info
& SVM_IOIO_TYPE_MASK
) != 0;
2250 return emulate_instruction(vcpu
, 0) == EMULATE_DONE
;
2252 port
= io_info
>> 16;
2253 size
= (io_info
& SVM_IOIO_SIZE_MASK
) >> SVM_IOIO_SIZE_SHIFT
;
2254 svm
->next_rip
= svm
->vmcb
->control
.exit_info_2
;
2255 skip_emulated_instruction(&svm
->vcpu
);
2257 return in
? kvm_fast_pio_in(vcpu
, size
, port
)
2258 : kvm_fast_pio_out(vcpu
, size
, port
);
2261 static int nmi_interception(struct vcpu_svm
*svm
)
2266 static int intr_interception(struct vcpu_svm
*svm
)
2268 ++svm
->vcpu
.stat
.irq_exits
;
2272 static int nop_on_interception(struct vcpu_svm
*svm
)
2277 static int halt_interception(struct vcpu_svm
*svm
)
2279 svm
->next_rip
= kvm_rip_read(&svm
->vcpu
) + 1;
2280 return kvm_emulate_halt(&svm
->vcpu
);
2283 static int vmmcall_interception(struct vcpu_svm
*svm
)
2285 svm
->next_rip
= kvm_rip_read(&svm
->vcpu
) + 3;
2286 return kvm_emulate_hypercall(&svm
->vcpu
);
2289 static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu
*vcpu
)
2291 struct vcpu_svm
*svm
= to_svm(vcpu
);
2293 return svm
->nested
.nested_cr3
;
2296 static u64
nested_svm_get_tdp_pdptr(struct kvm_vcpu
*vcpu
, int index
)
2298 struct vcpu_svm
*svm
= to_svm(vcpu
);
2299 u64 cr3
= svm
->nested
.nested_cr3
;
2303 ret
= kvm_vcpu_read_guest_page(vcpu
, gpa_to_gfn(cr3
), &pdpte
,
2304 offset_in_page(cr3
) + index
* 8, 8);
2310 static void nested_svm_set_tdp_cr3(struct kvm_vcpu
*vcpu
,
2313 struct vcpu_svm
*svm
= to_svm(vcpu
);
2315 svm
->vmcb
->control
.nested_cr3
= root
;
2316 mark_dirty(svm
->vmcb
, VMCB_NPT
);
2317 svm_flush_tlb(vcpu
);
2320 static void nested_svm_inject_npf_exit(struct kvm_vcpu
*vcpu
,
2321 struct x86_exception
*fault
)
2323 struct vcpu_svm
*svm
= to_svm(vcpu
);
2325 if (svm
->vmcb
->control
.exit_code
!= SVM_EXIT_NPF
) {
2327 * TODO: track the cause of the nested page fault, and
2328 * correctly fill in the high bits of exit_info_1.
2330 svm
->vmcb
->control
.exit_code
= SVM_EXIT_NPF
;
2331 svm
->vmcb
->control
.exit_code_hi
= 0;
2332 svm
->vmcb
->control
.exit_info_1
= (1ULL << 32);
2333 svm
->vmcb
->control
.exit_info_2
= fault
->address
;
2336 svm
->vmcb
->control
.exit_info_1
&= ~0xffffffffULL
;
2337 svm
->vmcb
->control
.exit_info_1
|= fault
->error_code
;
2340 * The present bit is always zero for page structure faults on real
2343 if (svm
->vmcb
->control
.exit_info_1
& (2ULL << 32))
2344 svm
->vmcb
->control
.exit_info_1
&= ~1;
2346 nested_svm_vmexit(svm
);
2349 static void nested_svm_init_mmu_context(struct kvm_vcpu
*vcpu
)
2351 WARN_ON(mmu_is_nested(vcpu
));
2352 kvm_init_shadow_mmu(vcpu
);
2353 vcpu
->arch
.mmu
.set_cr3
= nested_svm_set_tdp_cr3
;
2354 vcpu
->arch
.mmu
.get_cr3
= nested_svm_get_tdp_cr3
;
2355 vcpu
->arch
.mmu
.get_pdptr
= nested_svm_get_tdp_pdptr
;
2356 vcpu
->arch
.mmu
.inject_page_fault
= nested_svm_inject_npf_exit
;
2357 vcpu
->arch
.mmu
.shadow_root_level
= get_npt_level();
2358 reset_shadow_zero_bits_mask(vcpu
, &vcpu
->arch
.mmu
);
2359 vcpu
->arch
.walk_mmu
= &vcpu
->arch
.nested_mmu
;
2362 static void nested_svm_uninit_mmu_context(struct kvm_vcpu
*vcpu
)
2364 vcpu
->arch
.walk_mmu
= &vcpu
->arch
.mmu
;
2367 static int nested_svm_check_permissions(struct vcpu_svm
*svm
)
2369 if (!(svm
->vcpu
.arch
.efer
& EFER_SVME
)
2370 || !is_paging(&svm
->vcpu
)) {
2371 kvm_queue_exception(&svm
->vcpu
, UD_VECTOR
);
2375 if (svm
->vmcb
->save
.cpl
) {
2376 kvm_inject_gp(&svm
->vcpu
, 0);
2383 static int nested_svm_check_exception(struct vcpu_svm
*svm
, unsigned nr
,
2384 bool has_error_code
, u32 error_code
)
2388 if (!is_guest_mode(&svm
->vcpu
))
2391 svm
->vmcb
->control
.exit_code
= SVM_EXIT_EXCP_BASE
+ nr
;
2392 svm
->vmcb
->control
.exit_code_hi
= 0;
2393 svm
->vmcb
->control
.exit_info_1
= error_code
;
2394 svm
->vmcb
->control
.exit_info_2
= svm
->vcpu
.arch
.cr2
;
2396 vmexit
= nested_svm_intercept(svm
);
2397 if (vmexit
== NESTED_EXIT_DONE
)
2398 svm
->nested
.exit_required
= true;
2403 /* This function returns true if it is save to enable the irq window */
2404 static inline bool nested_svm_intr(struct vcpu_svm
*svm
)
2406 if (!is_guest_mode(&svm
->vcpu
))
2409 if (!(svm
->vcpu
.arch
.hflags
& HF_VINTR_MASK
))
2412 if (!(svm
->vcpu
.arch
.hflags
& HF_HIF_MASK
))
2416 * if vmexit was already requested (by intercepted exception
2417 * for instance) do not overwrite it with "external interrupt"
2420 if (svm
->nested
.exit_required
)
2423 svm
->vmcb
->control
.exit_code
= SVM_EXIT_INTR
;
2424 svm
->vmcb
->control
.exit_info_1
= 0;
2425 svm
->vmcb
->control
.exit_info_2
= 0;
2427 if (svm
->nested
.intercept
& 1ULL) {
2429 * The #vmexit can't be emulated here directly because this
2430 * code path runs with irqs and preemption disabled. A
2431 * #vmexit emulation might sleep. Only signal request for
2434 svm
->nested
.exit_required
= true;
2435 trace_kvm_nested_intr_vmexit(svm
->vmcb
->save
.rip
);
2442 /* This function returns true if it is save to enable the nmi window */
2443 static inline bool nested_svm_nmi(struct vcpu_svm
*svm
)
2445 if (!is_guest_mode(&svm
->vcpu
))
2448 if (!(svm
->nested
.intercept
& (1ULL << INTERCEPT_NMI
)))
2451 svm
->vmcb
->control
.exit_code
= SVM_EXIT_NMI
;
2452 svm
->nested
.exit_required
= true;
2457 static void *nested_svm_map(struct vcpu_svm
*svm
, u64 gpa
, struct page
**_page
)
2463 page
= kvm_vcpu_gfn_to_page(&svm
->vcpu
, gpa
>> PAGE_SHIFT
);
2464 if (is_error_page(page
))
2472 kvm_inject_gp(&svm
->vcpu
, 0);
2477 static void nested_svm_unmap(struct page
*page
)
2480 kvm_release_page_dirty(page
);
2483 static int nested_svm_intercept_ioio(struct vcpu_svm
*svm
)
2485 unsigned port
, size
, iopm_len
;
2490 if (!(svm
->nested
.intercept
& (1ULL << INTERCEPT_IOIO_PROT
)))
2491 return NESTED_EXIT_HOST
;
2493 port
= svm
->vmcb
->control
.exit_info_1
>> 16;
2494 size
= (svm
->vmcb
->control
.exit_info_1
& SVM_IOIO_SIZE_MASK
) >>
2495 SVM_IOIO_SIZE_SHIFT
;
2496 gpa
= svm
->nested
.vmcb_iopm
+ (port
/ 8);
2497 start_bit
= port
% 8;
2498 iopm_len
= (start_bit
+ size
> 8) ? 2 : 1;
2499 mask
= (0xf >> (4 - size
)) << start_bit
;
2502 if (kvm_vcpu_read_guest(&svm
->vcpu
, gpa
, &val
, iopm_len
))
2503 return NESTED_EXIT_DONE
;
2505 return (val
& mask
) ? NESTED_EXIT_DONE
: NESTED_EXIT_HOST
;
2508 static int nested_svm_exit_handled_msr(struct vcpu_svm
*svm
)
2510 u32 offset
, msr
, value
;
2513 if (!(svm
->nested
.intercept
& (1ULL << INTERCEPT_MSR_PROT
)))
2514 return NESTED_EXIT_HOST
;
2516 msr
= svm
->vcpu
.arch
.regs
[VCPU_REGS_RCX
];
2517 offset
= svm_msrpm_offset(msr
);
2518 write
= svm
->vmcb
->control
.exit_info_1
& 1;
2519 mask
= 1 << ((2 * (msr
& 0xf)) + write
);
2521 if (offset
== MSR_INVALID
)
2522 return NESTED_EXIT_DONE
;
2524 /* Offset is in 32 bit units but need in 8 bit units */
2527 if (kvm_vcpu_read_guest(&svm
->vcpu
, svm
->nested
.vmcb_msrpm
+ offset
, &value
, 4))
2528 return NESTED_EXIT_DONE
;
2530 return (value
& mask
) ? NESTED_EXIT_DONE
: NESTED_EXIT_HOST
;
2533 static int nested_svm_exit_special(struct vcpu_svm
*svm
)
2535 u32 exit_code
= svm
->vmcb
->control
.exit_code
;
2537 switch (exit_code
) {
2540 case SVM_EXIT_EXCP_BASE
+ MC_VECTOR
:
2541 return NESTED_EXIT_HOST
;
2543 /* For now we are always handling NPFs when using them */
2545 return NESTED_EXIT_HOST
;
2547 case SVM_EXIT_EXCP_BASE
+ PF_VECTOR
:
2548 /* When we're shadowing, trap PFs, but not async PF */
2549 if (!npt_enabled
&& svm
->apf_reason
== 0)
2550 return NESTED_EXIT_HOST
;
2556 return NESTED_EXIT_CONTINUE
;
2560 * If this function returns true, this #vmexit was already handled
2562 static int nested_svm_intercept(struct vcpu_svm
*svm
)
2564 u32 exit_code
= svm
->vmcb
->control
.exit_code
;
2565 int vmexit
= NESTED_EXIT_HOST
;
2567 switch (exit_code
) {
2569 vmexit
= nested_svm_exit_handled_msr(svm
);
2572 vmexit
= nested_svm_intercept_ioio(svm
);
2574 case SVM_EXIT_READ_CR0
... SVM_EXIT_WRITE_CR8
: {
2575 u32 bit
= 1U << (exit_code
- SVM_EXIT_READ_CR0
);
2576 if (svm
->nested
.intercept_cr
& bit
)
2577 vmexit
= NESTED_EXIT_DONE
;
2580 case SVM_EXIT_READ_DR0
... SVM_EXIT_WRITE_DR7
: {
2581 u32 bit
= 1U << (exit_code
- SVM_EXIT_READ_DR0
);
2582 if (svm
->nested
.intercept_dr
& bit
)
2583 vmexit
= NESTED_EXIT_DONE
;
2586 case SVM_EXIT_EXCP_BASE
... SVM_EXIT_EXCP_BASE
+ 0x1f: {
2587 u32 excp_bits
= 1 << (exit_code
- SVM_EXIT_EXCP_BASE
);
2588 if (svm
->nested
.intercept_exceptions
& excp_bits
)
2589 vmexit
= NESTED_EXIT_DONE
;
2590 /* async page fault always cause vmexit */
2591 else if ((exit_code
== SVM_EXIT_EXCP_BASE
+ PF_VECTOR
) &&
2592 svm
->apf_reason
!= 0)
2593 vmexit
= NESTED_EXIT_DONE
;
2596 case SVM_EXIT_ERR
: {
2597 vmexit
= NESTED_EXIT_DONE
;
2601 u64 exit_bits
= 1ULL << (exit_code
- SVM_EXIT_INTR
);
2602 if (svm
->nested
.intercept
& exit_bits
)
2603 vmexit
= NESTED_EXIT_DONE
;
2610 static int nested_svm_exit_handled(struct vcpu_svm
*svm
)
2614 vmexit
= nested_svm_intercept(svm
);
2616 if (vmexit
== NESTED_EXIT_DONE
)
2617 nested_svm_vmexit(svm
);
2622 static inline void copy_vmcb_control_area(struct vmcb
*dst_vmcb
, struct vmcb
*from_vmcb
)
2624 struct vmcb_control_area
*dst
= &dst_vmcb
->control
;
2625 struct vmcb_control_area
*from
= &from_vmcb
->control
;
2627 dst
->intercept_cr
= from
->intercept_cr
;
2628 dst
->intercept_dr
= from
->intercept_dr
;
2629 dst
->intercept_exceptions
= from
->intercept_exceptions
;
2630 dst
->intercept
= from
->intercept
;
2631 dst
->iopm_base_pa
= from
->iopm_base_pa
;
2632 dst
->msrpm_base_pa
= from
->msrpm_base_pa
;
2633 dst
->tsc_offset
= from
->tsc_offset
;
2634 dst
->asid
= from
->asid
;
2635 dst
->tlb_ctl
= from
->tlb_ctl
;
2636 dst
->int_ctl
= from
->int_ctl
;
2637 dst
->int_vector
= from
->int_vector
;
2638 dst
->int_state
= from
->int_state
;
2639 dst
->exit_code
= from
->exit_code
;
2640 dst
->exit_code_hi
= from
->exit_code_hi
;
2641 dst
->exit_info_1
= from
->exit_info_1
;
2642 dst
->exit_info_2
= from
->exit_info_2
;
2643 dst
->exit_int_info
= from
->exit_int_info
;
2644 dst
->exit_int_info_err
= from
->exit_int_info_err
;
2645 dst
->nested_ctl
= from
->nested_ctl
;
2646 dst
->event_inj
= from
->event_inj
;
2647 dst
->event_inj_err
= from
->event_inj_err
;
2648 dst
->nested_cr3
= from
->nested_cr3
;
2649 dst
->lbr_ctl
= from
->lbr_ctl
;
2652 static int nested_svm_vmexit(struct vcpu_svm
*svm
)
2654 struct vmcb
*nested_vmcb
;
2655 struct vmcb
*hsave
= svm
->nested
.hsave
;
2656 struct vmcb
*vmcb
= svm
->vmcb
;
2659 trace_kvm_nested_vmexit_inject(vmcb
->control
.exit_code
,
2660 vmcb
->control
.exit_info_1
,
2661 vmcb
->control
.exit_info_2
,
2662 vmcb
->control
.exit_int_info
,
2663 vmcb
->control
.exit_int_info_err
,
2666 nested_vmcb
= nested_svm_map(svm
, svm
->nested
.vmcb
, &page
);
2670 /* Exit Guest-Mode */
2671 leave_guest_mode(&svm
->vcpu
);
2672 svm
->nested
.vmcb
= 0;
2674 /* Give the current vmcb to the guest */
2677 nested_vmcb
->save
.es
= vmcb
->save
.es
;
2678 nested_vmcb
->save
.cs
= vmcb
->save
.cs
;
2679 nested_vmcb
->save
.ss
= vmcb
->save
.ss
;
2680 nested_vmcb
->save
.ds
= vmcb
->save
.ds
;
2681 nested_vmcb
->save
.gdtr
= vmcb
->save
.gdtr
;
2682 nested_vmcb
->save
.idtr
= vmcb
->save
.idtr
;
2683 nested_vmcb
->save
.efer
= svm
->vcpu
.arch
.efer
;
2684 nested_vmcb
->save
.cr0
= kvm_read_cr0(&svm
->vcpu
);
2685 nested_vmcb
->save
.cr3
= kvm_read_cr3(&svm
->vcpu
);
2686 nested_vmcb
->save
.cr2
= vmcb
->save
.cr2
;
2687 nested_vmcb
->save
.cr4
= svm
->vcpu
.arch
.cr4
;
2688 nested_vmcb
->save
.rflags
= kvm_get_rflags(&svm
->vcpu
);
2689 nested_vmcb
->save
.rip
= vmcb
->save
.rip
;
2690 nested_vmcb
->save
.rsp
= vmcb
->save
.rsp
;
2691 nested_vmcb
->save
.rax
= vmcb
->save
.rax
;
2692 nested_vmcb
->save
.dr7
= vmcb
->save
.dr7
;
2693 nested_vmcb
->save
.dr6
= vmcb
->save
.dr6
;
2694 nested_vmcb
->save
.cpl
= vmcb
->save
.cpl
;
2696 nested_vmcb
->control
.int_ctl
= vmcb
->control
.int_ctl
;
2697 nested_vmcb
->control
.int_vector
= vmcb
->control
.int_vector
;
2698 nested_vmcb
->control
.int_state
= vmcb
->control
.int_state
;
2699 nested_vmcb
->control
.exit_code
= vmcb
->control
.exit_code
;
2700 nested_vmcb
->control
.exit_code_hi
= vmcb
->control
.exit_code_hi
;
2701 nested_vmcb
->control
.exit_info_1
= vmcb
->control
.exit_info_1
;
2702 nested_vmcb
->control
.exit_info_2
= vmcb
->control
.exit_info_2
;
2703 nested_vmcb
->control
.exit_int_info
= vmcb
->control
.exit_int_info
;
2704 nested_vmcb
->control
.exit_int_info_err
= vmcb
->control
.exit_int_info_err
;
2706 if (svm
->nrips_enabled
)
2707 nested_vmcb
->control
.next_rip
= vmcb
->control
.next_rip
;
2710 * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have
2711 * to make sure that we do not lose injected events. So check event_inj
2712 * here and copy it to exit_int_info if it is valid.
2713 * Exit_int_info and event_inj can't be both valid because the case
2714 * below only happens on a VMRUN instruction intercept which has
2715 * no valid exit_int_info set.
2717 if (vmcb
->control
.event_inj
& SVM_EVTINJ_VALID
) {
2718 struct vmcb_control_area
*nc
= &nested_vmcb
->control
;
2720 nc
->exit_int_info
= vmcb
->control
.event_inj
;
2721 nc
->exit_int_info_err
= vmcb
->control
.event_inj_err
;
2724 nested_vmcb
->control
.tlb_ctl
= 0;
2725 nested_vmcb
->control
.event_inj
= 0;
2726 nested_vmcb
->control
.event_inj_err
= 0;
2728 /* We always set V_INTR_MASKING and remember the old value in hflags */
2729 if (!(svm
->vcpu
.arch
.hflags
& HF_VINTR_MASK
))
2730 nested_vmcb
->control
.int_ctl
&= ~V_INTR_MASKING_MASK
;
2732 /* Restore the original control entries */
2733 copy_vmcb_control_area(vmcb
, hsave
);
2735 kvm_clear_exception_queue(&svm
->vcpu
);
2736 kvm_clear_interrupt_queue(&svm
->vcpu
);
2738 svm
->nested
.nested_cr3
= 0;
2740 /* Restore selected save entries */
2741 svm
->vmcb
->save
.es
= hsave
->save
.es
;
2742 svm
->vmcb
->save
.cs
= hsave
->save
.cs
;
2743 svm
->vmcb
->save
.ss
= hsave
->save
.ss
;
2744 svm
->vmcb
->save
.ds
= hsave
->save
.ds
;
2745 svm
->vmcb
->save
.gdtr
= hsave
->save
.gdtr
;
2746 svm
->vmcb
->save
.idtr
= hsave
->save
.idtr
;
2747 kvm_set_rflags(&svm
->vcpu
, hsave
->save
.rflags
);
2748 svm_set_efer(&svm
->vcpu
, hsave
->save
.efer
);
2749 svm_set_cr0(&svm
->vcpu
, hsave
->save
.cr0
| X86_CR0_PE
);
2750 svm_set_cr4(&svm
->vcpu
, hsave
->save
.cr4
);
2752 svm
->vmcb
->save
.cr3
= hsave
->save
.cr3
;
2753 svm
->vcpu
.arch
.cr3
= hsave
->save
.cr3
;
2755 (void)kvm_set_cr3(&svm
->vcpu
, hsave
->save
.cr3
);
2757 kvm_register_write(&svm
->vcpu
, VCPU_REGS_RAX
, hsave
->save
.rax
);
2758 kvm_register_write(&svm
->vcpu
, VCPU_REGS_RSP
, hsave
->save
.rsp
);
2759 kvm_register_write(&svm
->vcpu
, VCPU_REGS_RIP
, hsave
->save
.rip
);
2760 svm
->vmcb
->save
.dr7
= 0;
2761 svm
->vmcb
->save
.cpl
= 0;
2762 svm
->vmcb
->control
.exit_int_info
= 0;
2764 mark_all_dirty(svm
->vmcb
);
2766 nested_svm_unmap(page
);
2768 nested_svm_uninit_mmu_context(&svm
->vcpu
);
2769 kvm_mmu_reset_context(&svm
->vcpu
);
2770 kvm_mmu_load(&svm
->vcpu
);
2775 static bool nested_svm_vmrun_msrpm(struct vcpu_svm
*svm
)
2778 * This function merges the msr permission bitmaps of kvm and the
2779 * nested vmcb. It is optimized in that it only merges the parts where
2780 * the kvm msr permission bitmap may contain zero bits
2784 if (!(svm
->nested
.intercept
& (1ULL << INTERCEPT_MSR_PROT
)))
2787 for (i
= 0; i
< MSRPM_OFFSETS
; i
++) {
2791 if (msrpm_offsets
[i
] == 0xffffffff)
2794 p
= msrpm_offsets
[i
];
2795 offset
= svm
->nested
.vmcb_msrpm
+ (p
* 4);
2797 if (kvm_vcpu_read_guest(&svm
->vcpu
, offset
, &value
, 4))
2800 svm
->nested
.msrpm
[p
] = svm
->msrpm
[p
] | value
;
2803 svm
->vmcb
->control
.msrpm_base_pa
= __pa(svm
->nested
.msrpm
);
2808 static bool nested_vmcb_checks(struct vmcb
*vmcb
)
2810 if ((vmcb
->control
.intercept
& (1ULL << INTERCEPT_VMRUN
)) == 0)
2813 if (vmcb
->control
.asid
== 0)
2816 if (vmcb
->control
.nested_ctl
&& !npt_enabled
)
2822 static bool nested_svm_vmrun(struct vcpu_svm
*svm
)
2824 struct vmcb
*nested_vmcb
;
2825 struct vmcb
*hsave
= svm
->nested
.hsave
;
2826 struct vmcb
*vmcb
= svm
->vmcb
;
2830 vmcb_gpa
= svm
->vmcb
->save
.rax
;
2832 nested_vmcb
= nested_svm_map(svm
, svm
->vmcb
->save
.rax
, &page
);
2836 if (!nested_vmcb_checks(nested_vmcb
)) {
2837 nested_vmcb
->control
.exit_code
= SVM_EXIT_ERR
;
2838 nested_vmcb
->control
.exit_code_hi
= 0;
2839 nested_vmcb
->control
.exit_info_1
= 0;
2840 nested_vmcb
->control
.exit_info_2
= 0;
2842 nested_svm_unmap(page
);
2847 trace_kvm_nested_vmrun(svm
->vmcb
->save
.rip
, vmcb_gpa
,
2848 nested_vmcb
->save
.rip
,
2849 nested_vmcb
->control
.int_ctl
,
2850 nested_vmcb
->control
.event_inj
,
2851 nested_vmcb
->control
.nested_ctl
);
2853 trace_kvm_nested_intercepts(nested_vmcb
->control
.intercept_cr
& 0xffff,
2854 nested_vmcb
->control
.intercept_cr
>> 16,
2855 nested_vmcb
->control
.intercept_exceptions
,
2856 nested_vmcb
->control
.intercept
);
2858 /* Clear internal status */
2859 kvm_clear_exception_queue(&svm
->vcpu
);
2860 kvm_clear_interrupt_queue(&svm
->vcpu
);
2863 * Save the old vmcb, so we don't need to pick what we save, but can
2864 * restore everything when a VMEXIT occurs
2866 hsave
->save
.es
= vmcb
->save
.es
;
2867 hsave
->save
.cs
= vmcb
->save
.cs
;
2868 hsave
->save
.ss
= vmcb
->save
.ss
;
2869 hsave
->save
.ds
= vmcb
->save
.ds
;
2870 hsave
->save
.gdtr
= vmcb
->save
.gdtr
;
2871 hsave
->save
.idtr
= vmcb
->save
.idtr
;
2872 hsave
->save
.efer
= svm
->vcpu
.arch
.efer
;
2873 hsave
->save
.cr0
= kvm_read_cr0(&svm
->vcpu
);
2874 hsave
->save
.cr4
= svm
->vcpu
.arch
.cr4
;
2875 hsave
->save
.rflags
= kvm_get_rflags(&svm
->vcpu
);
2876 hsave
->save
.rip
= kvm_rip_read(&svm
->vcpu
);
2877 hsave
->save
.rsp
= vmcb
->save
.rsp
;
2878 hsave
->save
.rax
= vmcb
->save
.rax
;
2880 hsave
->save
.cr3
= vmcb
->save
.cr3
;
2882 hsave
->save
.cr3
= kvm_read_cr3(&svm
->vcpu
);
2884 copy_vmcb_control_area(hsave
, vmcb
);
2886 if (kvm_get_rflags(&svm
->vcpu
) & X86_EFLAGS_IF
)
2887 svm
->vcpu
.arch
.hflags
|= HF_HIF_MASK
;
2889 svm
->vcpu
.arch
.hflags
&= ~HF_HIF_MASK
;
2891 if (nested_vmcb
->control
.nested_ctl
) {
2892 kvm_mmu_unload(&svm
->vcpu
);
2893 svm
->nested
.nested_cr3
= nested_vmcb
->control
.nested_cr3
;
2894 nested_svm_init_mmu_context(&svm
->vcpu
);
2897 /* Load the nested guest state */
2898 svm
->vmcb
->save
.es
= nested_vmcb
->save
.es
;
2899 svm
->vmcb
->save
.cs
= nested_vmcb
->save
.cs
;
2900 svm
->vmcb
->save
.ss
= nested_vmcb
->save
.ss
;
2901 svm
->vmcb
->save
.ds
= nested_vmcb
->save
.ds
;
2902 svm
->vmcb
->save
.gdtr
= nested_vmcb
->save
.gdtr
;
2903 svm
->vmcb
->save
.idtr
= nested_vmcb
->save
.idtr
;
2904 kvm_set_rflags(&svm
->vcpu
, nested_vmcb
->save
.rflags
);
2905 svm_set_efer(&svm
->vcpu
, nested_vmcb
->save
.efer
);
2906 svm_set_cr0(&svm
->vcpu
, nested_vmcb
->save
.cr0
);
2907 svm_set_cr4(&svm
->vcpu
, nested_vmcb
->save
.cr4
);
2909 svm
->vmcb
->save
.cr3
= nested_vmcb
->save
.cr3
;
2910 svm
->vcpu
.arch
.cr3
= nested_vmcb
->save
.cr3
;
2912 (void)kvm_set_cr3(&svm
->vcpu
, nested_vmcb
->save
.cr3
);
2914 /* Guest paging mode is active - reset mmu */
2915 kvm_mmu_reset_context(&svm
->vcpu
);
2917 svm
->vmcb
->save
.cr2
= svm
->vcpu
.arch
.cr2
= nested_vmcb
->save
.cr2
;
2918 kvm_register_write(&svm
->vcpu
, VCPU_REGS_RAX
, nested_vmcb
->save
.rax
);
2919 kvm_register_write(&svm
->vcpu
, VCPU_REGS_RSP
, nested_vmcb
->save
.rsp
);
2920 kvm_register_write(&svm
->vcpu
, VCPU_REGS_RIP
, nested_vmcb
->save
.rip
);
2922 /* In case we don't even reach vcpu_run, the fields are not updated */
2923 svm
->vmcb
->save
.rax
= nested_vmcb
->save
.rax
;
2924 svm
->vmcb
->save
.rsp
= nested_vmcb
->save
.rsp
;
2925 svm
->vmcb
->save
.rip
= nested_vmcb
->save
.rip
;
2926 svm
->vmcb
->save
.dr7
= nested_vmcb
->save
.dr7
;
2927 svm
->vmcb
->save
.dr6
= nested_vmcb
->save
.dr6
;
2928 svm
->vmcb
->save
.cpl
= nested_vmcb
->save
.cpl
;
2930 svm
->nested
.vmcb_msrpm
= nested_vmcb
->control
.msrpm_base_pa
& ~0x0fffULL
;
2931 svm
->nested
.vmcb_iopm
= nested_vmcb
->control
.iopm_base_pa
& ~0x0fffULL
;
2933 /* cache intercepts */
2934 svm
->nested
.intercept_cr
= nested_vmcb
->control
.intercept_cr
;
2935 svm
->nested
.intercept_dr
= nested_vmcb
->control
.intercept_dr
;
2936 svm
->nested
.intercept_exceptions
= nested_vmcb
->control
.intercept_exceptions
;
2937 svm
->nested
.intercept
= nested_vmcb
->control
.intercept
;
2939 svm_flush_tlb(&svm
->vcpu
);
2940 svm
->vmcb
->control
.int_ctl
= nested_vmcb
->control
.int_ctl
| V_INTR_MASKING_MASK
;
2941 if (nested_vmcb
->control
.int_ctl
& V_INTR_MASKING_MASK
)
2942 svm
->vcpu
.arch
.hflags
|= HF_VINTR_MASK
;
2944 svm
->vcpu
.arch
.hflags
&= ~HF_VINTR_MASK
;
2946 if (svm
->vcpu
.arch
.hflags
& HF_VINTR_MASK
) {
2947 /* We only want the cr8 intercept bits of the guest */
2948 clr_cr_intercept(svm
, INTERCEPT_CR8_READ
);
2949 clr_cr_intercept(svm
, INTERCEPT_CR8_WRITE
);
2952 /* We don't want to see VMMCALLs from a nested guest */
2953 clr_intercept(svm
, INTERCEPT_VMMCALL
);
2955 svm
->vmcb
->control
.lbr_ctl
= nested_vmcb
->control
.lbr_ctl
;
2956 svm
->vmcb
->control
.int_vector
= nested_vmcb
->control
.int_vector
;
2957 svm
->vmcb
->control
.int_state
= nested_vmcb
->control
.int_state
;
2958 svm
->vmcb
->control
.tsc_offset
+= nested_vmcb
->control
.tsc_offset
;
2959 svm
->vmcb
->control
.event_inj
= nested_vmcb
->control
.event_inj
;
2960 svm
->vmcb
->control
.event_inj_err
= nested_vmcb
->control
.event_inj_err
;
2962 nested_svm_unmap(page
);
2964 /* Enter Guest-Mode */
2965 enter_guest_mode(&svm
->vcpu
);
2968 * Merge guest and host intercepts - must be called with vcpu in
2969 * guest-mode to take affect here
2971 recalc_intercepts(svm
);
2973 svm
->nested
.vmcb
= vmcb_gpa
;
2977 mark_all_dirty(svm
->vmcb
);
2982 static void nested_svm_vmloadsave(struct vmcb
*from_vmcb
, struct vmcb
*to_vmcb
)
2984 to_vmcb
->save
.fs
= from_vmcb
->save
.fs
;
2985 to_vmcb
->save
.gs
= from_vmcb
->save
.gs
;
2986 to_vmcb
->save
.tr
= from_vmcb
->save
.tr
;
2987 to_vmcb
->save
.ldtr
= from_vmcb
->save
.ldtr
;
2988 to_vmcb
->save
.kernel_gs_base
= from_vmcb
->save
.kernel_gs_base
;
2989 to_vmcb
->save
.star
= from_vmcb
->save
.star
;
2990 to_vmcb
->save
.lstar
= from_vmcb
->save
.lstar
;
2991 to_vmcb
->save
.cstar
= from_vmcb
->save
.cstar
;
2992 to_vmcb
->save
.sfmask
= from_vmcb
->save
.sfmask
;
2993 to_vmcb
->save
.sysenter_cs
= from_vmcb
->save
.sysenter_cs
;
2994 to_vmcb
->save
.sysenter_esp
= from_vmcb
->save
.sysenter_esp
;
2995 to_vmcb
->save
.sysenter_eip
= from_vmcb
->save
.sysenter_eip
;
2998 static int vmload_interception(struct vcpu_svm
*svm
)
3000 struct vmcb
*nested_vmcb
;
3003 if (nested_svm_check_permissions(svm
))
3006 nested_vmcb
= nested_svm_map(svm
, svm
->vmcb
->save
.rax
, &page
);
3010 svm
->next_rip
= kvm_rip_read(&svm
->vcpu
) + 3;
3011 skip_emulated_instruction(&svm
->vcpu
);
3013 nested_svm_vmloadsave(nested_vmcb
, svm
->vmcb
);
3014 nested_svm_unmap(page
);
3019 static int vmsave_interception(struct vcpu_svm
*svm
)
3021 struct vmcb
*nested_vmcb
;
3024 if (nested_svm_check_permissions(svm
))
3027 nested_vmcb
= nested_svm_map(svm
, svm
->vmcb
->save
.rax
, &page
);
3031 svm
->next_rip
= kvm_rip_read(&svm
->vcpu
) + 3;
3032 skip_emulated_instruction(&svm
->vcpu
);
3034 nested_svm_vmloadsave(svm
->vmcb
, nested_vmcb
);
3035 nested_svm_unmap(page
);
3040 static int vmrun_interception(struct vcpu_svm
*svm
)
3042 if (nested_svm_check_permissions(svm
))
3045 /* Save rip after vmrun instruction */
3046 kvm_rip_write(&svm
->vcpu
, kvm_rip_read(&svm
->vcpu
) + 3);
3048 if (!nested_svm_vmrun(svm
))
3051 if (!nested_svm_vmrun_msrpm(svm
))
3058 svm
->vmcb
->control
.exit_code
= SVM_EXIT_ERR
;
3059 svm
->vmcb
->control
.exit_code_hi
= 0;
3060 svm
->vmcb
->control
.exit_info_1
= 0;
3061 svm
->vmcb
->control
.exit_info_2
= 0;
3063 nested_svm_vmexit(svm
);
3068 static int stgi_interception(struct vcpu_svm
*svm
)
3070 if (nested_svm_check_permissions(svm
))
3073 svm
->next_rip
= kvm_rip_read(&svm
->vcpu
) + 3;
3074 skip_emulated_instruction(&svm
->vcpu
);
3075 kvm_make_request(KVM_REQ_EVENT
, &svm
->vcpu
);
3082 static int clgi_interception(struct vcpu_svm
*svm
)
3084 if (nested_svm_check_permissions(svm
))
3087 svm
->next_rip
= kvm_rip_read(&svm
->vcpu
) + 3;
3088 skip_emulated_instruction(&svm
->vcpu
);
3092 /* After a CLGI no interrupts should come */
3093 if (!kvm_vcpu_apicv_active(&svm
->vcpu
)) {
3094 svm_clear_vintr(svm
);
3095 svm
->vmcb
->control
.int_ctl
&= ~V_IRQ_MASK
;
3096 mark_dirty(svm
->vmcb
, VMCB_INTR
);
3102 static int invlpga_interception(struct vcpu_svm
*svm
)
3104 struct kvm_vcpu
*vcpu
= &svm
->vcpu
;
3106 trace_kvm_invlpga(svm
->vmcb
->save
.rip
, kvm_register_read(&svm
->vcpu
, VCPU_REGS_RCX
),
3107 kvm_register_read(&svm
->vcpu
, VCPU_REGS_RAX
));
3109 /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
3110 kvm_mmu_invlpg(vcpu
, kvm_register_read(&svm
->vcpu
, VCPU_REGS_RAX
));
3112 svm
->next_rip
= kvm_rip_read(&svm
->vcpu
) + 3;
3113 skip_emulated_instruction(&svm
->vcpu
);
3117 static int skinit_interception(struct vcpu_svm
*svm
)
3119 trace_kvm_skinit(svm
->vmcb
->save
.rip
, kvm_register_read(&svm
->vcpu
, VCPU_REGS_RAX
));
3121 kvm_queue_exception(&svm
->vcpu
, UD_VECTOR
);
3125 static int wbinvd_interception(struct vcpu_svm
*svm
)
3127 return kvm_emulate_wbinvd(&svm
->vcpu
);
3130 static int xsetbv_interception(struct vcpu_svm
*svm
)
3132 u64 new_bv
= kvm_read_edx_eax(&svm
->vcpu
);
3133 u32 index
= kvm_register_read(&svm
->vcpu
, VCPU_REGS_RCX
);
3135 if (kvm_set_xcr(&svm
->vcpu
, index
, new_bv
) == 0) {
3136 svm
->next_rip
= kvm_rip_read(&svm
->vcpu
) + 3;
3137 skip_emulated_instruction(&svm
->vcpu
);
3143 static int task_switch_interception(struct vcpu_svm
*svm
)
3147 int int_type
= svm
->vmcb
->control
.exit_int_info
&
3148 SVM_EXITINTINFO_TYPE_MASK
;
3149 int int_vec
= svm
->vmcb
->control
.exit_int_info
& SVM_EVTINJ_VEC_MASK
;
3151 svm
->vmcb
->control
.exit_int_info
& SVM_EXITINTINFO_TYPE_MASK
;
3153 svm
->vmcb
->control
.exit_int_info
& SVM_EXITINTINFO_VALID
;
3154 bool has_error_code
= false;
3157 tss_selector
= (u16
)svm
->vmcb
->control
.exit_info_1
;
3159 if (svm
->vmcb
->control
.exit_info_2
&
3160 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET
))
3161 reason
= TASK_SWITCH_IRET
;
3162 else if (svm
->vmcb
->control
.exit_info_2
&
3163 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP
))
3164 reason
= TASK_SWITCH_JMP
;
3166 reason
= TASK_SWITCH_GATE
;
3168 reason
= TASK_SWITCH_CALL
;
3170 if (reason
== TASK_SWITCH_GATE
) {
3172 case SVM_EXITINTINFO_TYPE_NMI
:
3173 svm
->vcpu
.arch
.nmi_injected
= false;
3175 case SVM_EXITINTINFO_TYPE_EXEPT
:
3176 if (svm
->vmcb
->control
.exit_info_2
&
3177 (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE
)) {
3178 has_error_code
= true;
3180 (u32
)svm
->vmcb
->control
.exit_info_2
;
3182 kvm_clear_exception_queue(&svm
->vcpu
);
3184 case SVM_EXITINTINFO_TYPE_INTR
:
3185 kvm_clear_interrupt_queue(&svm
->vcpu
);
3192 if (reason
!= TASK_SWITCH_GATE
||
3193 int_type
== SVM_EXITINTINFO_TYPE_SOFT
||
3194 (int_type
== SVM_EXITINTINFO_TYPE_EXEPT
&&
3195 (int_vec
== OF_VECTOR
|| int_vec
== BP_VECTOR
)))
3196 skip_emulated_instruction(&svm
->vcpu
);
3198 if (int_type
!= SVM_EXITINTINFO_TYPE_SOFT
)
3201 if (kvm_task_switch(&svm
->vcpu
, tss_selector
, int_vec
, reason
,
3202 has_error_code
, error_code
) == EMULATE_FAIL
) {
3203 svm
->vcpu
.run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
3204 svm
->vcpu
.run
->internal
.suberror
= KVM_INTERNAL_ERROR_EMULATION
;
3205 svm
->vcpu
.run
->internal
.ndata
= 0;
3211 static int cpuid_interception(struct vcpu_svm
*svm
)
3213 svm
->next_rip
= kvm_rip_read(&svm
->vcpu
) + 2;
3214 return kvm_emulate_cpuid(&svm
->vcpu
);
3217 static int iret_interception(struct vcpu_svm
*svm
)
3219 ++svm
->vcpu
.stat
.nmi_window_exits
;
3220 clr_intercept(svm
, INTERCEPT_IRET
);
3221 svm
->vcpu
.arch
.hflags
|= HF_IRET_MASK
;
3222 svm
->nmi_iret_rip
= kvm_rip_read(&svm
->vcpu
);
3223 kvm_make_request(KVM_REQ_EVENT
, &svm
->vcpu
);
3227 static int invlpg_interception(struct vcpu_svm
*svm
)
3229 if (!static_cpu_has(X86_FEATURE_DECODEASSISTS
))
3230 return emulate_instruction(&svm
->vcpu
, 0) == EMULATE_DONE
;
3232 kvm_mmu_invlpg(&svm
->vcpu
, svm
->vmcb
->control
.exit_info_1
);
3233 skip_emulated_instruction(&svm
->vcpu
);
3237 static int emulate_on_interception(struct vcpu_svm
*svm
)
3239 return emulate_instruction(&svm
->vcpu
, 0) == EMULATE_DONE
;
3242 static int rdpmc_interception(struct vcpu_svm
*svm
)
3246 if (!static_cpu_has(X86_FEATURE_NRIPS
))
3247 return emulate_on_interception(svm
);
3249 err
= kvm_rdpmc(&svm
->vcpu
);
3250 return kvm_complete_insn_gp(&svm
->vcpu
, err
);
3253 static bool check_selective_cr0_intercepted(struct vcpu_svm
*svm
,
3256 unsigned long cr0
= svm
->vcpu
.arch
.cr0
;
3260 intercept
= svm
->nested
.intercept
;
3262 if (!is_guest_mode(&svm
->vcpu
) ||
3263 (!(intercept
& (1ULL << INTERCEPT_SELECTIVE_CR0
))))
3266 cr0
&= ~SVM_CR0_SELECTIVE_MASK
;
3267 val
&= ~SVM_CR0_SELECTIVE_MASK
;
3270 svm
->vmcb
->control
.exit_code
= SVM_EXIT_CR0_SEL_WRITE
;
3271 ret
= (nested_svm_exit_handled(svm
) == NESTED_EXIT_DONE
);
3277 #define CR_VALID (1ULL << 63)
3279 static int cr_interception(struct vcpu_svm
*svm
)
3285 if (!static_cpu_has(X86_FEATURE_DECODEASSISTS
))
3286 return emulate_on_interception(svm
);
3288 if (unlikely((svm
->vmcb
->control
.exit_info_1
& CR_VALID
) == 0))
3289 return emulate_on_interception(svm
);
3291 reg
= svm
->vmcb
->control
.exit_info_1
& SVM_EXITINFO_REG_MASK
;
3292 if (svm
->vmcb
->control
.exit_code
== SVM_EXIT_CR0_SEL_WRITE
)
3293 cr
= SVM_EXIT_WRITE_CR0
- SVM_EXIT_READ_CR0
;
3295 cr
= svm
->vmcb
->control
.exit_code
- SVM_EXIT_READ_CR0
;
3298 if (cr
>= 16) { /* mov to cr */
3300 val
= kvm_register_read(&svm
->vcpu
, reg
);
3303 if (!check_selective_cr0_intercepted(svm
, val
))
3304 err
= kvm_set_cr0(&svm
->vcpu
, val
);
3310 err
= kvm_set_cr3(&svm
->vcpu
, val
);
3313 err
= kvm_set_cr4(&svm
->vcpu
, val
);
3316 err
= kvm_set_cr8(&svm
->vcpu
, val
);
3319 WARN(1, "unhandled write to CR%d", cr
);
3320 kvm_queue_exception(&svm
->vcpu
, UD_VECTOR
);
3323 } else { /* mov from cr */
3326 val
= kvm_read_cr0(&svm
->vcpu
);
3329 val
= svm
->vcpu
.arch
.cr2
;
3332 val
= kvm_read_cr3(&svm
->vcpu
);
3335 val
= kvm_read_cr4(&svm
->vcpu
);
3338 val
= kvm_get_cr8(&svm
->vcpu
);
3341 WARN(1, "unhandled read from CR%d", cr
);
3342 kvm_queue_exception(&svm
->vcpu
, UD_VECTOR
);
3345 kvm_register_write(&svm
->vcpu
, reg
, val
);
3347 return kvm_complete_insn_gp(&svm
->vcpu
, err
);
3350 static int dr_interception(struct vcpu_svm
*svm
)
3355 if (svm
->vcpu
.guest_debug
== 0) {
3357 * No more DR vmexits; force a reload of the debug registers
3358 * and reenter on this instruction. The next vmexit will
3359 * retrieve the full state of the debug registers.
3361 clr_dr_intercepts(svm
);
3362 svm
->vcpu
.arch
.switch_db_regs
|= KVM_DEBUGREG_WONT_EXIT
;
3366 if (!boot_cpu_has(X86_FEATURE_DECODEASSISTS
))
3367 return emulate_on_interception(svm
);
3369 reg
= svm
->vmcb
->control
.exit_info_1
& SVM_EXITINFO_REG_MASK
;
3370 dr
= svm
->vmcb
->control
.exit_code
- SVM_EXIT_READ_DR0
;
3372 if (dr
>= 16) { /* mov to DRn */
3373 if (!kvm_require_dr(&svm
->vcpu
, dr
- 16))
3375 val
= kvm_register_read(&svm
->vcpu
, reg
);
3376 kvm_set_dr(&svm
->vcpu
, dr
- 16, val
);
3378 if (!kvm_require_dr(&svm
->vcpu
, dr
))
3380 kvm_get_dr(&svm
->vcpu
, dr
, &val
);
3381 kvm_register_write(&svm
->vcpu
, reg
, val
);
3384 skip_emulated_instruction(&svm
->vcpu
);
3389 static int cr8_write_interception(struct vcpu_svm
*svm
)
3391 struct kvm_run
*kvm_run
= svm
->vcpu
.run
;
3394 u8 cr8_prev
= kvm_get_cr8(&svm
->vcpu
);
3395 /* instruction emulation calls kvm_set_cr8() */
3396 r
= cr_interception(svm
);
3397 if (lapic_in_kernel(&svm
->vcpu
))
3399 if (cr8_prev
<= kvm_get_cr8(&svm
->vcpu
))
3401 kvm_run
->exit_reason
= KVM_EXIT_SET_TPR
;
3405 static int svm_get_msr(struct kvm_vcpu
*vcpu
, struct msr_data
*msr_info
)
3407 struct vcpu_svm
*svm
= to_svm(vcpu
);
3409 switch (msr_info
->index
) {
3410 case MSR_IA32_TSC
: {
3411 msr_info
->data
= svm
->vmcb
->control
.tsc_offset
+
3412 kvm_scale_tsc(vcpu
, rdtsc());
3417 msr_info
->data
= svm
->vmcb
->save
.star
;
3419 #ifdef CONFIG_X86_64
3421 msr_info
->data
= svm
->vmcb
->save
.lstar
;
3424 msr_info
->data
= svm
->vmcb
->save
.cstar
;
3426 case MSR_KERNEL_GS_BASE
:
3427 msr_info
->data
= svm
->vmcb
->save
.kernel_gs_base
;
3429 case MSR_SYSCALL_MASK
:
3430 msr_info
->data
= svm
->vmcb
->save
.sfmask
;
3433 case MSR_IA32_SYSENTER_CS
:
3434 msr_info
->data
= svm
->vmcb
->save
.sysenter_cs
;
3436 case MSR_IA32_SYSENTER_EIP
:
3437 msr_info
->data
= svm
->sysenter_eip
;
3439 case MSR_IA32_SYSENTER_ESP
:
3440 msr_info
->data
= svm
->sysenter_esp
;
3443 if (!boot_cpu_has(X86_FEATURE_RDTSCP
))
3445 msr_info
->data
= svm
->tsc_aux
;
3448 * Nobody will change the following 5 values in the VMCB so we can
3449 * safely return them on rdmsr. They will always be 0 until LBRV is
3452 case MSR_IA32_DEBUGCTLMSR
:
3453 msr_info
->data
= svm
->vmcb
->save
.dbgctl
;
3455 case MSR_IA32_LASTBRANCHFROMIP
:
3456 msr_info
->data
= svm
->vmcb
->save
.br_from
;
3458 case MSR_IA32_LASTBRANCHTOIP
:
3459 msr_info
->data
= svm
->vmcb
->save
.br_to
;
3461 case MSR_IA32_LASTINTFROMIP
:
3462 msr_info
->data
= svm
->vmcb
->save
.last_excp_from
;
3464 case MSR_IA32_LASTINTTOIP
:
3465 msr_info
->data
= svm
->vmcb
->save
.last_excp_to
;
3467 case MSR_VM_HSAVE_PA
:
3468 msr_info
->data
= svm
->nested
.hsave_msr
;
3471 msr_info
->data
= svm
->nested
.vm_cr_msr
;
3473 case MSR_IA32_UCODE_REV
:
3474 msr_info
->data
= 0x01000065;
3476 case MSR_F15H_IC_CFG
: {
3480 family
= guest_cpuid_family(vcpu
);
3481 model
= guest_cpuid_model(vcpu
);
3483 if (family
< 0 || model
< 0)
3484 return kvm_get_msr_common(vcpu
, msr_info
);
3488 if (family
== 0x15 &&
3489 (model
>= 0x2 && model
< 0x20))
3490 msr_info
->data
= 0x1E;
3494 return kvm_get_msr_common(vcpu
, msr_info
);
3499 static int rdmsr_interception(struct vcpu_svm
*svm
)
3501 u32 ecx
= kvm_register_read(&svm
->vcpu
, VCPU_REGS_RCX
);
3502 struct msr_data msr_info
;
3504 msr_info
.index
= ecx
;
3505 msr_info
.host_initiated
= false;
3506 if (svm_get_msr(&svm
->vcpu
, &msr_info
)) {
3507 trace_kvm_msr_read_ex(ecx
);
3508 kvm_inject_gp(&svm
->vcpu
, 0);
3510 trace_kvm_msr_read(ecx
, msr_info
.data
);
3512 kvm_register_write(&svm
->vcpu
, VCPU_REGS_RAX
,
3513 msr_info
.data
& 0xffffffff);
3514 kvm_register_write(&svm
->vcpu
, VCPU_REGS_RDX
,
3515 msr_info
.data
>> 32);
3516 svm
->next_rip
= kvm_rip_read(&svm
->vcpu
) + 2;
3517 skip_emulated_instruction(&svm
->vcpu
);
3522 static int svm_set_vm_cr(struct kvm_vcpu
*vcpu
, u64 data
)
3524 struct vcpu_svm
*svm
= to_svm(vcpu
);
3525 int svm_dis
, chg_mask
;
3527 if (data
& ~SVM_VM_CR_VALID_MASK
)
3530 chg_mask
= SVM_VM_CR_VALID_MASK
;
3532 if (svm
->nested
.vm_cr_msr
& SVM_VM_CR_SVM_DIS_MASK
)
3533 chg_mask
&= ~(SVM_VM_CR_SVM_LOCK_MASK
| SVM_VM_CR_SVM_DIS_MASK
);
3535 svm
->nested
.vm_cr_msr
&= ~chg_mask
;
3536 svm
->nested
.vm_cr_msr
|= (data
& chg_mask
);
3538 svm_dis
= svm
->nested
.vm_cr_msr
& SVM_VM_CR_SVM_DIS_MASK
;
3540 /* check for svm_disable while efer.svme is set */
3541 if (svm_dis
&& (vcpu
->arch
.efer
& EFER_SVME
))
3547 static int svm_set_msr(struct kvm_vcpu
*vcpu
, struct msr_data
*msr
)
3549 struct vcpu_svm
*svm
= to_svm(vcpu
);
3551 u32 ecx
= msr
->index
;
3552 u64 data
= msr
->data
;
3555 kvm_write_tsc(vcpu
, msr
);
3558 svm
->vmcb
->save
.star
= data
;
3560 #ifdef CONFIG_X86_64
3562 svm
->vmcb
->save
.lstar
= data
;
3565 svm
->vmcb
->save
.cstar
= data
;
3567 case MSR_KERNEL_GS_BASE
:
3568 svm
->vmcb
->save
.kernel_gs_base
= data
;
3570 case MSR_SYSCALL_MASK
:
3571 svm
->vmcb
->save
.sfmask
= data
;
3574 case MSR_IA32_SYSENTER_CS
:
3575 svm
->vmcb
->save
.sysenter_cs
= data
;
3577 case MSR_IA32_SYSENTER_EIP
:
3578 svm
->sysenter_eip
= data
;
3579 svm
->vmcb
->save
.sysenter_eip
= data
;
3581 case MSR_IA32_SYSENTER_ESP
:
3582 svm
->sysenter_esp
= data
;
3583 svm
->vmcb
->save
.sysenter_esp
= data
;
3586 if (!boot_cpu_has(X86_FEATURE_RDTSCP
))
3590 * This is rare, so we update the MSR here instead of using
3591 * direct_access_msrs. Doing that would require a rdmsr in
3594 svm
->tsc_aux
= data
;
3595 wrmsrl(MSR_TSC_AUX
, svm
->tsc_aux
);
3597 case MSR_IA32_DEBUGCTLMSR
:
3598 if (!boot_cpu_has(X86_FEATURE_LBRV
)) {
3599 vcpu_unimpl(vcpu
, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
3603 if (data
& DEBUGCTL_RESERVED_BITS
)
3606 svm
->vmcb
->save
.dbgctl
= data
;
3607 mark_dirty(svm
->vmcb
, VMCB_LBR
);
3608 if (data
& (1ULL<<0))
3609 svm_enable_lbrv(svm
);
3611 svm_disable_lbrv(svm
);
3613 case MSR_VM_HSAVE_PA
:
3614 svm
->nested
.hsave_msr
= data
;
3617 return svm_set_vm_cr(vcpu
, data
);
3619 vcpu_unimpl(vcpu
, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx
, data
);
3621 case MSR_IA32_APICBASE
:
3622 if (kvm_vcpu_apicv_active(vcpu
))
3623 avic_update_vapic_bar(to_svm(vcpu
), data
);
3624 /* Follow through */
3626 return kvm_set_msr_common(vcpu
, msr
);
3631 static int wrmsr_interception(struct vcpu_svm
*svm
)
3633 struct msr_data msr
;
3634 u32 ecx
= kvm_register_read(&svm
->vcpu
, VCPU_REGS_RCX
);
3635 u64 data
= kvm_read_edx_eax(&svm
->vcpu
);
3639 msr
.host_initiated
= false;
3641 svm
->next_rip
= kvm_rip_read(&svm
->vcpu
) + 2;
3642 if (kvm_set_msr(&svm
->vcpu
, &msr
)) {
3643 trace_kvm_msr_write_ex(ecx
, data
);
3644 kvm_inject_gp(&svm
->vcpu
, 0);
3646 trace_kvm_msr_write(ecx
, data
);
3647 skip_emulated_instruction(&svm
->vcpu
);
3652 static int msr_interception(struct vcpu_svm
*svm
)
3654 if (svm
->vmcb
->control
.exit_info_1
)
3655 return wrmsr_interception(svm
);
3657 return rdmsr_interception(svm
);
3660 static int interrupt_window_interception(struct vcpu_svm
*svm
)
3662 kvm_make_request(KVM_REQ_EVENT
, &svm
->vcpu
);
3663 svm_clear_vintr(svm
);
3664 svm
->vmcb
->control
.int_ctl
&= ~V_IRQ_MASK
;
3665 mark_dirty(svm
->vmcb
, VMCB_INTR
);
3666 ++svm
->vcpu
.stat
.irq_window_exits
;
3670 static int pause_interception(struct vcpu_svm
*svm
)
3672 kvm_vcpu_on_spin(&(svm
->vcpu
));
3676 static int nop_interception(struct vcpu_svm
*svm
)
3678 skip_emulated_instruction(&(svm
->vcpu
));
3682 static int monitor_interception(struct vcpu_svm
*svm
)
3684 printk_once(KERN_WARNING
"kvm: MONITOR instruction emulated as NOP!\n");
3685 return nop_interception(svm
);
3688 static int mwait_interception(struct vcpu_svm
*svm
)
3690 printk_once(KERN_WARNING
"kvm: MWAIT instruction emulated as NOP!\n");
3691 return nop_interception(svm
);
3694 enum avic_ipi_failure_cause
{
3695 AVIC_IPI_FAILURE_INVALID_INT_TYPE
,
3696 AVIC_IPI_FAILURE_TARGET_NOT_RUNNING
,
3697 AVIC_IPI_FAILURE_INVALID_TARGET
,
3698 AVIC_IPI_FAILURE_INVALID_BACKING_PAGE
,
3701 static int avic_incomplete_ipi_interception(struct vcpu_svm
*svm
)
3703 u32 icrh
= svm
->vmcb
->control
.exit_info_1
>> 32;
3704 u32 icrl
= svm
->vmcb
->control
.exit_info_1
;
3705 u32 id
= svm
->vmcb
->control
.exit_info_2
>> 32;
3706 u32 index
= svm
->vmcb
->control
.exit_info_2
& 0xFF;
3707 struct kvm_lapic
*apic
= svm
->vcpu
.arch
.apic
;
3709 trace_kvm_avic_incomplete_ipi(svm
->vcpu
.vcpu_id
, icrh
, icrl
, id
, index
);
3712 case AVIC_IPI_FAILURE_INVALID_INT_TYPE
:
3714 * AVIC hardware handles the generation of
3715 * IPIs when the specified Message Type is Fixed
3716 * (also known as fixed delivery mode) and
3717 * the Trigger Mode is edge-triggered. The hardware
3718 * also supports self and broadcast delivery modes
3719 * specified via the Destination Shorthand(DSH)
3720 * field of the ICRL. Logical and physical APIC ID
3721 * formats are supported. All other IPI types cause
3722 * a #VMEXIT, which needs to emulated.
3724 kvm_lapic_reg_write(apic
, APIC_ICR2
, icrh
);
3725 kvm_lapic_reg_write(apic
, APIC_ICR
, icrl
);
3727 case AVIC_IPI_FAILURE_TARGET_NOT_RUNNING
: {
3729 struct kvm_vcpu
*vcpu
;
3730 struct kvm
*kvm
= svm
->vcpu
.kvm
;
3731 struct kvm_lapic
*apic
= svm
->vcpu
.arch
.apic
;
3734 * At this point, we expect that the AVIC HW has already
3735 * set the appropriate IRR bits on the valid target
3736 * vcpus. So, we just need to kick the appropriate vcpu.
3738 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
3739 bool m
= kvm_apic_match_dest(vcpu
, apic
,
3740 icrl
& KVM_APIC_SHORT_MASK
,
3741 GET_APIC_DEST_FIELD(icrh
),
3742 icrl
& KVM_APIC_DEST_MASK
);
3744 if (m
&& !avic_vcpu_is_running(vcpu
))
3745 kvm_vcpu_wake_up(vcpu
);
3749 case AVIC_IPI_FAILURE_INVALID_TARGET
:
3751 case AVIC_IPI_FAILURE_INVALID_BACKING_PAGE
:
3752 WARN_ONCE(1, "Invalid backing page\n");
3755 pr_err("Unknown IPI interception\n");
3761 static u32
*avic_get_logical_id_entry(struct kvm_vcpu
*vcpu
, u32 ldr
, bool flat
)
3763 struct kvm_arch
*vm_data
= &vcpu
->kvm
->arch
;
3765 u32
*logical_apic_id_table
;
3766 int dlid
= GET_APIC_LOGICAL_ID(ldr
);
3771 if (flat
) { /* flat */
3772 index
= ffs(dlid
) - 1;
3775 } else { /* cluster */
3776 int cluster
= (dlid
& 0xf0) >> 4;
3777 int apic
= ffs(dlid
& 0x0f) - 1;
3779 if ((apic
< 0) || (apic
> 7) ||
3782 index
= (cluster
<< 2) + apic
;
3785 logical_apic_id_table
= (u32
*) page_address(vm_data
->avic_logical_id_table_page
);
3787 return &logical_apic_id_table
[index
];
3790 static int avic_ldr_write(struct kvm_vcpu
*vcpu
, u8 g_physical_id
, u32 ldr
,
3794 u32
*entry
, new_entry
;
3796 flat
= kvm_lapic_get_reg(vcpu
->arch
.apic
, APIC_DFR
) == APIC_DFR_FLAT
;
3797 entry
= avic_get_logical_id_entry(vcpu
, ldr
, flat
);
3801 new_entry
= READ_ONCE(*entry
);
3802 new_entry
&= ~AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK
;
3803 new_entry
|= (g_physical_id
& AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK
);
3805 new_entry
|= AVIC_LOGICAL_ID_ENTRY_VALID_MASK
;
3807 new_entry
&= ~AVIC_LOGICAL_ID_ENTRY_VALID_MASK
;
3808 WRITE_ONCE(*entry
, new_entry
);
3813 static int avic_handle_ldr_update(struct kvm_vcpu
*vcpu
)
3816 struct vcpu_svm
*svm
= to_svm(vcpu
);
3817 u32 ldr
= kvm_lapic_get_reg(vcpu
->arch
.apic
, APIC_LDR
);
3822 ret
= avic_ldr_write(vcpu
, vcpu
->vcpu_id
, ldr
, true);
3823 if (ret
&& svm
->ldr_reg
) {
3824 avic_ldr_write(vcpu
, 0, svm
->ldr_reg
, false);
3832 static int avic_handle_apic_id_update(struct kvm_vcpu
*vcpu
)
3835 struct vcpu_svm
*svm
= to_svm(vcpu
);
3836 u32 apic_id_reg
= kvm_lapic_get_reg(vcpu
->arch
.apic
, APIC_ID
);
3837 u32 id
= (apic_id_reg
>> 24) & 0xff;
3839 if (vcpu
->vcpu_id
== id
)
3842 old
= avic_get_physical_id_entry(vcpu
, vcpu
->vcpu_id
);
3843 new = avic_get_physical_id_entry(vcpu
, id
);
3847 /* We need to move physical_id_entry to new offset */
3850 to_svm(vcpu
)->avic_physical_id_cache
= new;
3853 * Also update the guest physical APIC ID in the logical
3854 * APIC ID table entry if already setup the LDR.
3857 avic_handle_ldr_update(vcpu
);
3862 static int avic_handle_dfr_update(struct kvm_vcpu
*vcpu
)
3864 struct vcpu_svm
*svm
= to_svm(vcpu
);
3865 struct kvm_arch
*vm_data
= &vcpu
->kvm
->arch
;
3866 u32 dfr
= kvm_lapic_get_reg(vcpu
->arch
.apic
, APIC_DFR
);
3867 u32 mod
= (dfr
>> 28) & 0xf;
3870 * We assume that all local APICs are using the same type.
3871 * If this changes, we need to flush the AVIC logical
3874 if (vm_data
->ldr_mode
== mod
)
3877 clear_page(page_address(vm_data
->avic_logical_id_table_page
));
3878 vm_data
->ldr_mode
= mod
;
3881 avic_handle_ldr_update(vcpu
);
3885 static int avic_unaccel_trap_write(struct vcpu_svm
*svm
)
3887 struct kvm_lapic
*apic
= svm
->vcpu
.arch
.apic
;
3888 u32 offset
= svm
->vmcb
->control
.exit_info_1
&
3889 AVIC_UNACCEL_ACCESS_OFFSET_MASK
;
3893 if (avic_handle_apic_id_update(&svm
->vcpu
))
3897 if (avic_handle_ldr_update(&svm
->vcpu
))
3901 avic_handle_dfr_update(&svm
->vcpu
);
3907 kvm_lapic_reg_write(apic
, offset
, kvm_lapic_get_reg(apic
, offset
));
3912 static bool is_avic_unaccelerated_access_trap(u32 offset
)
3941 static int avic_unaccelerated_access_interception(struct vcpu_svm
*svm
)
3944 u32 offset
= svm
->vmcb
->control
.exit_info_1
&
3945 AVIC_UNACCEL_ACCESS_OFFSET_MASK
;
3946 u32 vector
= svm
->vmcb
->control
.exit_info_2
&
3947 AVIC_UNACCEL_ACCESS_VECTOR_MASK
;
3948 bool write
= (svm
->vmcb
->control
.exit_info_1
>> 32) &
3949 AVIC_UNACCEL_ACCESS_WRITE_MASK
;
3950 bool trap
= is_avic_unaccelerated_access_trap(offset
);
3952 trace_kvm_avic_unaccelerated_access(svm
->vcpu
.vcpu_id
, offset
,
3953 trap
, write
, vector
);
3956 WARN_ONCE(!write
, "svm: Handling trap read.\n");
3957 ret
= avic_unaccel_trap_write(svm
);
3959 /* Handling Fault */
3960 ret
= (emulate_instruction(&svm
->vcpu
, 0) == EMULATE_DONE
);
3966 static int (*const svm_exit_handlers
[])(struct vcpu_svm
*svm
) = {
3967 [SVM_EXIT_READ_CR0
] = cr_interception
,
3968 [SVM_EXIT_READ_CR3
] = cr_interception
,
3969 [SVM_EXIT_READ_CR4
] = cr_interception
,
3970 [SVM_EXIT_READ_CR8
] = cr_interception
,
3971 [SVM_EXIT_CR0_SEL_WRITE
] = cr_interception
,
3972 [SVM_EXIT_WRITE_CR0
] = cr_interception
,
3973 [SVM_EXIT_WRITE_CR3
] = cr_interception
,
3974 [SVM_EXIT_WRITE_CR4
] = cr_interception
,
3975 [SVM_EXIT_WRITE_CR8
] = cr8_write_interception
,
3976 [SVM_EXIT_READ_DR0
] = dr_interception
,
3977 [SVM_EXIT_READ_DR1
] = dr_interception
,
3978 [SVM_EXIT_READ_DR2
] = dr_interception
,
3979 [SVM_EXIT_READ_DR3
] = dr_interception
,
3980 [SVM_EXIT_READ_DR4
] = dr_interception
,
3981 [SVM_EXIT_READ_DR5
] = dr_interception
,
3982 [SVM_EXIT_READ_DR6
] = dr_interception
,
3983 [SVM_EXIT_READ_DR7
] = dr_interception
,
3984 [SVM_EXIT_WRITE_DR0
] = dr_interception
,
3985 [SVM_EXIT_WRITE_DR1
] = dr_interception
,
3986 [SVM_EXIT_WRITE_DR2
] = dr_interception
,
3987 [SVM_EXIT_WRITE_DR3
] = dr_interception
,
3988 [SVM_EXIT_WRITE_DR4
] = dr_interception
,
3989 [SVM_EXIT_WRITE_DR5
] = dr_interception
,
3990 [SVM_EXIT_WRITE_DR6
] = dr_interception
,
3991 [SVM_EXIT_WRITE_DR7
] = dr_interception
,
3992 [SVM_EXIT_EXCP_BASE
+ DB_VECTOR
] = db_interception
,
3993 [SVM_EXIT_EXCP_BASE
+ BP_VECTOR
] = bp_interception
,
3994 [SVM_EXIT_EXCP_BASE
+ UD_VECTOR
] = ud_interception
,
3995 [SVM_EXIT_EXCP_BASE
+ PF_VECTOR
] = pf_interception
,
3996 [SVM_EXIT_EXCP_BASE
+ MC_VECTOR
] = mc_interception
,
3997 [SVM_EXIT_EXCP_BASE
+ AC_VECTOR
] = ac_interception
,
3998 [SVM_EXIT_INTR
] = intr_interception
,
3999 [SVM_EXIT_NMI
] = nmi_interception
,
4000 [SVM_EXIT_SMI
] = nop_on_interception
,
4001 [SVM_EXIT_INIT
] = nop_on_interception
,
4002 [SVM_EXIT_VINTR
] = interrupt_window_interception
,
4003 [SVM_EXIT_RDPMC
] = rdpmc_interception
,
4004 [SVM_EXIT_CPUID
] = cpuid_interception
,
4005 [SVM_EXIT_IRET
] = iret_interception
,
4006 [SVM_EXIT_INVD
] = emulate_on_interception
,
4007 [SVM_EXIT_PAUSE
] = pause_interception
,
4008 [SVM_EXIT_HLT
] = halt_interception
,
4009 [SVM_EXIT_INVLPG
] = invlpg_interception
,
4010 [SVM_EXIT_INVLPGA
] = invlpga_interception
,
4011 [SVM_EXIT_IOIO
] = io_interception
,
4012 [SVM_EXIT_MSR
] = msr_interception
,
4013 [SVM_EXIT_TASK_SWITCH
] = task_switch_interception
,
4014 [SVM_EXIT_SHUTDOWN
] = shutdown_interception
,
4015 [SVM_EXIT_VMRUN
] = vmrun_interception
,
4016 [SVM_EXIT_VMMCALL
] = vmmcall_interception
,
4017 [SVM_EXIT_VMLOAD
] = vmload_interception
,
4018 [SVM_EXIT_VMSAVE
] = vmsave_interception
,
4019 [SVM_EXIT_STGI
] = stgi_interception
,
4020 [SVM_EXIT_CLGI
] = clgi_interception
,
4021 [SVM_EXIT_SKINIT
] = skinit_interception
,
4022 [SVM_EXIT_WBINVD
] = wbinvd_interception
,
4023 [SVM_EXIT_MONITOR
] = monitor_interception
,
4024 [SVM_EXIT_MWAIT
] = mwait_interception
,
4025 [SVM_EXIT_XSETBV
] = xsetbv_interception
,
4026 [SVM_EXIT_NPF
] = pf_interception
,
4027 [SVM_EXIT_RSM
] = emulate_on_interception
,
4028 [SVM_EXIT_AVIC_INCOMPLETE_IPI
] = avic_incomplete_ipi_interception
,
4029 [SVM_EXIT_AVIC_UNACCELERATED_ACCESS
] = avic_unaccelerated_access_interception
,
4032 static void dump_vmcb(struct kvm_vcpu
*vcpu
)
4034 struct vcpu_svm
*svm
= to_svm(vcpu
);
4035 struct vmcb_control_area
*control
= &svm
->vmcb
->control
;
4036 struct vmcb_save_area
*save
= &svm
->vmcb
->save
;
4038 pr_err("VMCB Control Area:\n");
4039 pr_err("%-20s%04x\n", "cr_read:", control
->intercept_cr
& 0xffff);
4040 pr_err("%-20s%04x\n", "cr_write:", control
->intercept_cr
>> 16);
4041 pr_err("%-20s%04x\n", "dr_read:", control
->intercept_dr
& 0xffff);
4042 pr_err("%-20s%04x\n", "dr_write:", control
->intercept_dr
>> 16);
4043 pr_err("%-20s%08x\n", "exceptions:", control
->intercept_exceptions
);
4044 pr_err("%-20s%016llx\n", "intercepts:", control
->intercept
);
4045 pr_err("%-20s%d\n", "pause filter count:", control
->pause_filter_count
);
4046 pr_err("%-20s%016llx\n", "iopm_base_pa:", control
->iopm_base_pa
);
4047 pr_err("%-20s%016llx\n", "msrpm_base_pa:", control
->msrpm_base_pa
);
4048 pr_err("%-20s%016llx\n", "tsc_offset:", control
->tsc_offset
);
4049 pr_err("%-20s%d\n", "asid:", control
->asid
);
4050 pr_err("%-20s%d\n", "tlb_ctl:", control
->tlb_ctl
);
4051 pr_err("%-20s%08x\n", "int_ctl:", control
->int_ctl
);
4052 pr_err("%-20s%08x\n", "int_vector:", control
->int_vector
);
4053 pr_err("%-20s%08x\n", "int_state:", control
->int_state
);
4054 pr_err("%-20s%08x\n", "exit_code:", control
->exit_code
);
4055 pr_err("%-20s%016llx\n", "exit_info1:", control
->exit_info_1
);
4056 pr_err("%-20s%016llx\n", "exit_info2:", control
->exit_info_2
);
4057 pr_err("%-20s%08x\n", "exit_int_info:", control
->exit_int_info
);
4058 pr_err("%-20s%08x\n", "exit_int_info_err:", control
->exit_int_info_err
);
4059 pr_err("%-20s%lld\n", "nested_ctl:", control
->nested_ctl
);
4060 pr_err("%-20s%016llx\n", "nested_cr3:", control
->nested_cr3
);
4061 pr_err("%-20s%016llx\n", "avic_vapic_bar:", control
->avic_vapic_bar
);
4062 pr_err("%-20s%08x\n", "event_inj:", control
->event_inj
);
4063 pr_err("%-20s%08x\n", "event_inj_err:", control
->event_inj_err
);
4064 pr_err("%-20s%lld\n", "lbr_ctl:", control
->lbr_ctl
);
4065 pr_err("%-20s%016llx\n", "next_rip:", control
->next_rip
);
4066 pr_err("%-20s%016llx\n", "avic_backing_page:", control
->avic_backing_page
);
4067 pr_err("%-20s%016llx\n", "avic_logical_id:", control
->avic_logical_id
);
4068 pr_err("%-20s%016llx\n", "avic_physical_id:", control
->avic_physical_id
);
4069 pr_err("VMCB State Save Area:\n");
4070 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4072 save
->es
.selector
, save
->es
.attrib
,
4073 save
->es
.limit
, save
->es
.base
);
4074 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4076 save
->cs
.selector
, save
->cs
.attrib
,
4077 save
->cs
.limit
, save
->cs
.base
);
4078 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4080 save
->ss
.selector
, save
->ss
.attrib
,
4081 save
->ss
.limit
, save
->ss
.base
);
4082 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4084 save
->ds
.selector
, save
->ds
.attrib
,
4085 save
->ds
.limit
, save
->ds
.base
);
4086 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4088 save
->fs
.selector
, save
->fs
.attrib
,
4089 save
->fs
.limit
, save
->fs
.base
);
4090 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4092 save
->gs
.selector
, save
->gs
.attrib
,
4093 save
->gs
.limit
, save
->gs
.base
);
4094 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4096 save
->gdtr
.selector
, save
->gdtr
.attrib
,
4097 save
->gdtr
.limit
, save
->gdtr
.base
);
4098 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4100 save
->ldtr
.selector
, save
->ldtr
.attrib
,
4101 save
->ldtr
.limit
, save
->ldtr
.base
);
4102 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4104 save
->idtr
.selector
, save
->idtr
.attrib
,
4105 save
->idtr
.limit
, save
->idtr
.base
);
4106 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
4108 save
->tr
.selector
, save
->tr
.attrib
,
4109 save
->tr
.limit
, save
->tr
.base
);
4110 pr_err("cpl: %d efer: %016llx\n",
4111 save
->cpl
, save
->efer
);
4112 pr_err("%-15s %016llx %-13s %016llx\n",
4113 "cr0:", save
->cr0
, "cr2:", save
->cr2
);
4114 pr_err("%-15s %016llx %-13s %016llx\n",
4115 "cr3:", save
->cr3
, "cr4:", save
->cr4
);
4116 pr_err("%-15s %016llx %-13s %016llx\n",
4117 "dr6:", save
->dr6
, "dr7:", save
->dr7
);
4118 pr_err("%-15s %016llx %-13s %016llx\n",
4119 "rip:", save
->rip
, "rflags:", save
->rflags
);
4120 pr_err("%-15s %016llx %-13s %016llx\n",
4121 "rsp:", save
->rsp
, "rax:", save
->rax
);
4122 pr_err("%-15s %016llx %-13s %016llx\n",
4123 "star:", save
->star
, "lstar:", save
->lstar
);
4124 pr_err("%-15s %016llx %-13s %016llx\n",
4125 "cstar:", save
->cstar
, "sfmask:", save
->sfmask
);
4126 pr_err("%-15s %016llx %-13s %016llx\n",
4127 "kernel_gs_base:", save
->kernel_gs_base
,
4128 "sysenter_cs:", save
->sysenter_cs
);
4129 pr_err("%-15s %016llx %-13s %016llx\n",
4130 "sysenter_esp:", save
->sysenter_esp
,
4131 "sysenter_eip:", save
->sysenter_eip
);
4132 pr_err("%-15s %016llx %-13s %016llx\n",
4133 "gpat:", save
->g_pat
, "dbgctl:", save
->dbgctl
);
4134 pr_err("%-15s %016llx %-13s %016llx\n",
4135 "br_from:", save
->br_from
, "br_to:", save
->br_to
);
4136 pr_err("%-15s %016llx %-13s %016llx\n",
4137 "excp_from:", save
->last_excp_from
,
4138 "excp_to:", save
->last_excp_to
);
4141 static void svm_get_exit_info(struct kvm_vcpu
*vcpu
, u64
*info1
, u64
*info2
)
4143 struct vmcb_control_area
*control
= &to_svm(vcpu
)->vmcb
->control
;
4145 *info1
= control
->exit_info_1
;
4146 *info2
= control
->exit_info_2
;
4149 static int handle_exit(struct kvm_vcpu
*vcpu
)
4151 struct vcpu_svm
*svm
= to_svm(vcpu
);
4152 struct kvm_run
*kvm_run
= vcpu
->run
;
4153 u32 exit_code
= svm
->vmcb
->control
.exit_code
;
4155 trace_kvm_exit(exit_code
, vcpu
, KVM_ISA_SVM
);
4157 vcpu
->arch
.gpa_available
= (exit_code
== SVM_EXIT_NPF
);
4159 if (!is_cr_intercept(svm
, INTERCEPT_CR0_WRITE
))
4160 vcpu
->arch
.cr0
= svm
->vmcb
->save
.cr0
;
4162 vcpu
->arch
.cr3
= svm
->vmcb
->save
.cr3
;
4164 if (unlikely(svm
->nested
.exit_required
)) {
4165 nested_svm_vmexit(svm
);
4166 svm
->nested
.exit_required
= false;
4171 if (is_guest_mode(vcpu
)) {
4174 trace_kvm_nested_vmexit(svm
->vmcb
->save
.rip
, exit_code
,
4175 svm
->vmcb
->control
.exit_info_1
,
4176 svm
->vmcb
->control
.exit_info_2
,
4177 svm
->vmcb
->control
.exit_int_info
,
4178 svm
->vmcb
->control
.exit_int_info_err
,
4181 vmexit
= nested_svm_exit_special(svm
);
4183 if (vmexit
== NESTED_EXIT_CONTINUE
)
4184 vmexit
= nested_svm_exit_handled(svm
);
4186 if (vmexit
== NESTED_EXIT_DONE
)
4190 svm_complete_interrupts(svm
);
4192 if (svm
->vmcb
->control
.exit_code
== SVM_EXIT_ERR
) {
4193 kvm_run
->exit_reason
= KVM_EXIT_FAIL_ENTRY
;
4194 kvm_run
->fail_entry
.hardware_entry_failure_reason
4195 = svm
->vmcb
->control
.exit_code
;
4196 pr_err("KVM: FAILED VMRUN WITH VMCB:\n");
4201 if (is_external_interrupt(svm
->vmcb
->control
.exit_int_info
) &&
4202 exit_code
!= SVM_EXIT_EXCP_BASE
+ PF_VECTOR
&&
4203 exit_code
!= SVM_EXIT_NPF
&& exit_code
!= SVM_EXIT_TASK_SWITCH
&&
4204 exit_code
!= SVM_EXIT_INTR
&& exit_code
!= SVM_EXIT_NMI
)
4205 printk(KERN_ERR
"%s: unexpected exit_int_info 0x%x "
4207 __func__
, svm
->vmcb
->control
.exit_int_info
,
4210 if (exit_code
>= ARRAY_SIZE(svm_exit_handlers
)
4211 || !svm_exit_handlers
[exit_code
]) {
4212 WARN_ONCE(1, "svm: unexpected exit reason 0x%x\n", exit_code
);
4213 kvm_queue_exception(vcpu
, UD_VECTOR
);
4217 return svm_exit_handlers
[exit_code
](svm
);
4220 static void reload_tss(struct kvm_vcpu
*vcpu
)
4222 int cpu
= raw_smp_processor_id();
4224 struct svm_cpu_data
*sd
= per_cpu(svm_data
, cpu
);
4225 sd
->tss_desc
->type
= 9; /* available 32/64-bit TSS */
4229 static void pre_svm_run(struct vcpu_svm
*svm
)
4231 int cpu
= raw_smp_processor_id();
4233 struct svm_cpu_data
*sd
= per_cpu(svm_data
, cpu
);
4235 /* FIXME: handle wraparound of asid_generation */
4236 if (svm
->asid_generation
!= sd
->asid_generation
)
4240 static void svm_inject_nmi(struct kvm_vcpu
*vcpu
)
4242 struct vcpu_svm
*svm
= to_svm(vcpu
);
4244 svm
->vmcb
->control
.event_inj
= SVM_EVTINJ_VALID
| SVM_EVTINJ_TYPE_NMI
;
4245 vcpu
->arch
.hflags
|= HF_NMI_MASK
;
4246 set_intercept(svm
, INTERCEPT_IRET
);
4247 ++vcpu
->stat
.nmi_injections
;
4250 static inline void svm_inject_irq(struct vcpu_svm
*svm
, int irq
)
4252 struct vmcb_control_area
*control
;
4254 /* The following fields are ignored when AVIC is enabled */
4255 control
= &svm
->vmcb
->control
;
4256 control
->int_vector
= irq
;
4257 control
->int_ctl
&= ~V_INTR_PRIO_MASK
;
4258 control
->int_ctl
|= V_IRQ_MASK
|
4259 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT
);
4260 mark_dirty(svm
->vmcb
, VMCB_INTR
);
4263 static void svm_set_irq(struct kvm_vcpu
*vcpu
)
4265 struct vcpu_svm
*svm
= to_svm(vcpu
);
4267 BUG_ON(!(gif_set(svm
)));
4269 trace_kvm_inj_virq(vcpu
->arch
.interrupt
.nr
);
4270 ++vcpu
->stat
.irq_injections
;
4272 svm
->vmcb
->control
.event_inj
= vcpu
->arch
.interrupt
.nr
|
4273 SVM_EVTINJ_VALID
| SVM_EVTINJ_TYPE_INTR
;
4276 static inline bool svm_nested_virtualize_tpr(struct kvm_vcpu
*vcpu
)
4278 return is_guest_mode(vcpu
) && (vcpu
->arch
.hflags
& HF_VINTR_MASK
);
4281 static void update_cr8_intercept(struct kvm_vcpu
*vcpu
, int tpr
, int irr
)
4283 struct vcpu_svm
*svm
= to_svm(vcpu
);
4285 if (svm_nested_virtualize_tpr(vcpu
) ||
4286 kvm_vcpu_apicv_active(vcpu
))
4289 clr_cr_intercept(svm
, INTERCEPT_CR8_WRITE
);
4295 set_cr_intercept(svm
, INTERCEPT_CR8_WRITE
);
4298 static void svm_set_virtual_x2apic_mode(struct kvm_vcpu
*vcpu
, bool set
)
4303 static bool svm_get_enable_apicv(void)
4308 static void svm_hwapic_irr_update(struct kvm_vcpu
*vcpu
, int max_irr
)
4312 static void svm_hwapic_isr_update(struct kvm_vcpu
*vcpu
, int max_isr
)
4316 /* Note: Currently only used by Hyper-V. */
4317 static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu
*vcpu
)
4319 struct vcpu_svm
*svm
= to_svm(vcpu
);
4320 struct vmcb
*vmcb
= svm
->vmcb
;
4325 vmcb
->control
.int_ctl
&= ~AVIC_ENABLE_MASK
;
4326 mark_dirty(vmcb
, VMCB_INTR
);
4329 static void svm_load_eoi_exitmap(struct kvm_vcpu
*vcpu
, u64
*eoi_exit_bitmap
)
4334 static void svm_deliver_avic_intr(struct kvm_vcpu
*vcpu
, int vec
)
4336 kvm_lapic_set_irr(vec
, vcpu
->arch
.apic
);
4337 smp_mb__after_atomic();
4339 if (avic_vcpu_is_running(vcpu
))
4340 wrmsrl(SVM_AVIC_DOORBELL
,
4341 kvm_cpu_get_apicid(vcpu
->cpu
));
4343 kvm_vcpu_wake_up(vcpu
);
4346 static void svm_ir_list_del(struct vcpu_svm
*svm
, struct amd_iommu_pi_data
*pi
)
4348 unsigned long flags
;
4349 struct amd_svm_iommu_ir
*cur
;
4351 spin_lock_irqsave(&svm
->ir_list_lock
, flags
);
4352 list_for_each_entry(cur
, &svm
->ir_list
, node
) {
4353 if (cur
->data
!= pi
->ir_data
)
4355 list_del(&cur
->node
);
4359 spin_unlock_irqrestore(&svm
->ir_list_lock
, flags
);
4362 static int svm_ir_list_add(struct vcpu_svm
*svm
, struct amd_iommu_pi_data
*pi
)
4365 unsigned long flags
;
4366 struct amd_svm_iommu_ir
*ir
;
4369 * In some cases, the existing irte is updaed and re-set,
4370 * so we need to check here if it's already been * added
4373 if (pi
->ir_data
&& (pi
->prev_ga_tag
!= 0)) {
4374 struct kvm
*kvm
= svm
->vcpu
.kvm
;
4375 u32 vcpu_id
= AVIC_GATAG_TO_VCPUID(pi
->prev_ga_tag
);
4376 struct kvm_vcpu
*prev_vcpu
= kvm_get_vcpu_by_id(kvm
, vcpu_id
);
4377 struct vcpu_svm
*prev_svm
;
4384 prev_svm
= to_svm(prev_vcpu
);
4385 svm_ir_list_del(prev_svm
, pi
);
4389 * Allocating new amd_iommu_pi_data, which will get
4390 * add to the per-vcpu ir_list.
4392 ir
= kzalloc(sizeof(struct amd_svm_iommu_ir
), GFP_KERNEL
);
4397 ir
->data
= pi
->ir_data
;
4399 spin_lock_irqsave(&svm
->ir_list_lock
, flags
);
4400 list_add(&ir
->node
, &svm
->ir_list
);
4401 spin_unlock_irqrestore(&svm
->ir_list_lock
, flags
);
4408 * The HW cannot support posting multicast/broadcast
4409 * interrupts to a vCPU. So, we still use legacy interrupt
4410 * remapping for these kind of interrupts.
4412 * For lowest-priority interrupts, we only support
4413 * those with single CPU as the destination, e.g. user
4414 * configures the interrupts via /proc/irq or uses
4415 * irqbalance to make the interrupts single-CPU.
4418 get_pi_vcpu_info(struct kvm
*kvm
, struct kvm_kernel_irq_routing_entry
*e
,
4419 struct vcpu_data
*vcpu_info
, struct vcpu_svm
**svm
)
4421 struct kvm_lapic_irq irq
;
4422 struct kvm_vcpu
*vcpu
= NULL
;
4424 kvm_set_msi_irq(kvm
, e
, &irq
);
4426 if (!kvm_intr_is_single_vcpu(kvm
, &irq
, &vcpu
)) {
4427 pr_debug("SVM: %s: use legacy intr remap mode for irq %u\n",
4428 __func__
, irq
.vector
);
4432 pr_debug("SVM: %s: use GA mode for irq %u\n", __func__
,
4434 *svm
= to_svm(vcpu
);
4435 vcpu_info
->pi_desc_addr
= page_to_phys((*svm
)->avic_backing_page
);
4436 vcpu_info
->vector
= irq
.vector
;
4442 * svm_update_pi_irte - set IRTE for Posted-Interrupts
4445 * @host_irq: host irq of the interrupt
4446 * @guest_irq: gsi of the interrupt
4447 * @set: set or unset PI
4448 * returns 0 on success, < 0 on failure
4450 static int svm_update_pi_irte(struct kvm
*kvm
, unsigned int host_irq
,
4451 uint32_t guest_irq
, bool set
)
4453 struct kvm_kernel_irq_routing_entry
*e
;
4454 struct kvm_irq_routing_table
*irq_rt
;
4455 int idx
, ret
= -EINVAL
;
4457 if (!kvm_arch_has_assigned_device(kvm
) ||
4458 !irq_remapping_cap(IRQ_POSTING_CAP
))
4461 pr_debug("SVM: %s: host_irq=%#x, guest_irq=%#x, set=%#x\n",
4462 __func__
, host_irq
, guest_irq
, set
);
4464 idx
= srcu_read_lock(&kvm
->irq_srcu
);
4465 irq_rt
= srcu_dereference(kvm
->irq_routing
, &kvm
->irq_srcu
);
4466 WARN_ON(guest_irq
>= irq_rt
->nr_rt_entries
);
4468 hlist_for_each_entry(e
, &irq_rt
->map
[guest_irq
], link
) {
4469 struct vcpu_data vcpu_info
;
4470 struct vcpu_svm
*svm
= NULL
;
4472 if (e
->type
!= KVM_IRQ_ROUTING_MSI
)
4476 * Here, we setup with legacy mode in the following cases:
4477 * 1. When cannot target interrupt to a specific vcpu.
4478 * 2. Unsetting posted interrupt.
4479 * 3. APIC virtialization is disabled for the vcpu.
4481 if (!get_pi_vcpu_info(kvm
, e
, &vcpu_info
, &svm
) && set
&&
4482 kvm_vcpu_apicv_active(&svm
->vcpu
)) {
4483 struct amd_iommu_pi_data pi
;
4485 /* Try to enable guest_mode in IRTE */
4486 pi
.base
= page_to_phys(svm
->avic_backing_page
) & AVIC_HPA_MASK
;
4487 pi
.ga_tag
= AVIC_GATAG(kvm
->arch
.avic_vm_id
,
4489 pi
.is_guest_mode
= true;
4490 pi
.vcpu_data
= &vcpu_info
;
4491 ret
= irq_set_vcpu_affinity(host_irq
, &pi
);
4494 * Here, we successfully setting up vcpu affinity in
4495 * IOMMU guest mode. Now, we need to store the posted
4496 * interrupt information in a per-vcpu ir_list so that
4497 * we can reference to them directly when we update vcpu
4498 * scheduling information in IOMMU irte.
4500 if (!ret
&& pi
.is_guest_mode
)
4501 svm_ir_list_add(svm
, &pi
);
4503 /* Use legacy mode in IRTE */
4504 struct amd_iommu_pi_data pi
;
4507 * Here, pi is used to:
4508 * - Tell IOMMU to use legacy mode for this interrupt.
4509 * - Retrieve ga_tag of prior interrupt remapping data.
4511 pi
.is_guest_mode
= false;
4512 ret
= irq_set_vcpu_affinity(host_irq
, &pi
);
4515 * Check if the posted interrupt was previously
4516 * setup with the guest_mode by checking if the ga_tag
4517 * was cached. If so, we need to clean up the per-vcpu
4520 if (!ret
&& pi
.prev_ga_tag
) {
4521 int id
= AVIC_GATAG_TO_VCPUID(pi
.prev_ga_tag
);
4522 struct kvm_vcpu
*vcpu
;
4524 vcpu
= kvm_get_vcpu_by_id(kvm
, id
);
4526 svm_ir_list_del(to_svm(vcpu
), &pi
);
4531 trace_kvm_pi_irte_update(svm
->vcpu
.vcpu_id
,
4534 vcpu_info
.pi_desc_addr
, set
);
4538 pr_err("%s: failed to update PI IRTE\n", __func__
);
4545 srcu_read_unlock(&kvm
->irq_srcu
, idx
);
4549 static int svm_nmi_allowed(struct kvm_vcpu
*vcpu
)
4551 struct vcpu_svm
*svm
= to_svm(vcpu
);
4552 struct vmcb
*vmcb
= svm
->vmcb
;
4554 ret
= !(vmcb
->control
.int_state
& SVM_INTERRUPT_SHADOW_MASK
) &&
4555 !(svm
->vcpu
.arch
.hflags
& HF_NMI_MASK
);
4556 ret
= ret
&& gif_set(svm
) && nested_svm_nmi(svm
);
4561 static bool svm_get_nmi_mask(struct kvm_vcpu
*vcpu
)
4563 struct vcpu_svm
*svm
= to_svm(vcpu
);
4565 return !!(svm
->vcpu
.arch
.hflags
& HF_NMI_MASK
);
4568 static void svm_set_nmi_mask(struct kvm_vcpu
*vcpu
, bool masked
)
4570 struct vcpu_svm
*svm
= to_svm(vcpu
);
4573 svm
->vcpu
.arch
.hflags
|= HF_NMI_MASK
;
4574 set_intercept(svm
, INTERCEPT_IRET
);
4576 svm
->vcpu
.arch
.hflags
&= ~HF_NMI_MASK
;
4577 clr_intercept(svm
, INTERCEPT_IRET
);
4581 static int svm_interrupt_allowed(struct kvm_vcpu
*vcpu
)
4583 struct vcpu_svm
*svm
= to_svm(vcpu
);
4584 struct vmcb
*vmcb
= svm
->vmcb
;
4587 if (!gif_set(svm
) ||
4588 (vmcb
->control
.int_state
& SVM_INTERRUPT_SHADOW_MASK
))
4591 ret
= !!(kvm_get_rflags(vcpu
) & X86_EFLAGS_IF
);
4593 if (is_guest_mode(vcpu
))
4594 return ret
&& !(svm
->vcpu
.arch
.hflags
& HF_VINTR_MASK
);
4599 static void enable_irq_window(struct kvm_vcpu
*vcpu
)
4601 struct vcpu_svm
*svm
= to_svm(vcpu
);
4603 if (kvm_vcpu_apicv_active(vcpu
))
4607 * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes
4608 * 1, because that's a separate STGI/VMRUN intercept. The next time we
4609 * get that intercept, this function will be called again though and
4610 * we'll get the vintr intercept.
4612 if (gif_set(svm
) && nested_svm_intr(svm
)) {
4614 svm_inject_irq(svm
, 0x0);
4618 static void enable_nmi_window(struct kvm_vcpu
*vcpu
)
4620 struct vcpu_svm
*svm
= to_svm(vcpu
);
4622 if ((svm
->vcpu
.arch
.hflags
& (HF_NMI_MASK
| HF_IRET_MASK
))
4624 return; /* IRET will cause a vm exit */
4627 * Something prevents NMI from been injected. Single step over possible
4628 * problem (IRET or exception injection or interrupt shadow)
4630 svm
->nmi_singlestep
= true;
4631 svm
->vmcb
->save
.rflags
|= (X86_EFLAGS_TF
| X86_EFLAGS_RF
);
4634 static int svm_set_tss_addr(struct kvm
*kvm
, unsigned int addr
)
4639 static void svm_flush_tlb(struct kvm_vcpu
*vcpu
)
4641 struct vcpu_svm
*svm
= to_svm(vcpu
);
4643 if (static_cpu_has(X86_FEATURE_FLUSHBYASID
))
4644 svm
->vmcb
->control
.tlb_ctl
= TLB_CONTROL_FLUSH_ASID
;
4646 svm
->asid_generation
--;
4649 static void svm_prepare_guest_switch(struct kvm_vcpu
*vcpu
)
4653 static inline void sync_cr8_to_lapic(struct kvm_vcpu
*vcpu
)
4655 struct vcpu_svm
*svm
= to_svm(vcpu
);
4657 if (svm_nested_virtualize_tpr(vcpu
))
4660 if (!is_cr_intercept(svm
, INTERCEPT_CR8_WRITE
)) {
4661 int cr8
= svm
->vmcb
->control
.int_ctl
& V_TPR_MASK
;
4662 kvm_set_cr8(vcpu
, cr8
);
4666 static inline void sync_lapic_to_cr8(struct kvm_vcpu
*vcpu
)
4668 struct vcpu_svm
*svm
= to_svm(vcpu
);
4671 if (svm_nested_virtualize_tpr(vcpu
) ||
4672 kvm_vcpu_apicv_active(vcpu
))
4675 cr8
= kvm_get_cr8(vcpu
);
4676 svm
->vmcb
->control
.int_ctl
&= ~V_TPR_MASK
;
4677 svm
->vmcb
->control
.int_ctl
|= cr8
& V_TPR_MASK
;
4680 static void svm_complete_interrupts(struct vcpu_svm
*svm
)
4684 u32 exitintinfo
= svm
->vmcb
->control
.exit_int_info
;
4685 unsigned int3_injected
= svm
->int3_injected
;
4687 svm
->int3_injected
= 0;
4690 * If we've made progress since setting HF_IRET_MASK, we've
4691 * executed an IRET and can allow NMI injection.
4693 if ((svm
->vcpu
.arch
.hflags
& HF_IRET_MASK
)
4694 && kvm_rip_read(&svm
->vcpu
) != svm
->nmi_iret_rip
) {
4695 svm
->vcpu
.arch
.hflags
&= ~(HF_NMI_MASK
| HF_IRET_MASK
);
4696 kvm_make_request(KVM_REQ_EVENT
, &svm
->vcpu
);
4699 svm
->vcpu
.arch
.nmi_injected
= false;
4700 kvm_clear_exception_queue(&svm
->vcpu
);
4701 kvm_clear_interrupt_queue(&svm
->vcpu
);
4703 if (!(exitintinfo
& SVM_EXITINTINFO_VALID
))
4706 kvm_make_request(KVM_REQ_EVENT
, &svm
->vcpu
);
4708 vector
= exitintinfo
& SVM_EXITINTINFO_VEC_MASK
;
4709 type
= exitintinfo
& SVM_EXITINTINFO_TYPE_MASK
;
4712 case SVM_EXITINTINFO_TYPE_NMI
:
4713 svm
->vcpu
.arch
.nmi_injected
= true;
4715 case SVM_EXITINTINFO_TYPE_EXEPT
:
4717 * In case of software exceptions, do not reinject the vector,
4718 * but re-execute the instruction instead. Rewind RIP first
4719 * if we emulated INT3 before.
4721 if (kvm_exception_is_soft(vector
)) {
4722 if (vector
== BP_VECTOR
&& int3_injected
&&
4723 kvm_is_linear_rip(&svm
->vcpu
, svm
->int3_rip
))
4724 kvm_rip_write(&svm
->vcpu
,
4725 kvm_rip_read(&svm
->vcpu
) -
4729 if (exitintinfo
& SVM_EXITINTINFO_VALID_ERR
) {
4730 u32 err
= svm
->vmcb
->control
.exit_int_info_err
;
4731 kvm_requeue_exception_e(&svm
->vcpu
, vector
, err
);
4734 kvm_requeue_exception(&svm
->vcpu
, vector
);
4736 case SVM_EXITINTINFO_TYPE_INTR
:
4737 kvm_queue_interrupt(&svm
->vcpu
, vector
, false);
4744 static void svm_cancel_injection(struct kvm_vcpu
*vcpu
)
4746 struct vcpu_svm
*svm
= to_svm(vcpu
);
4747 struct vmcb_control_area
*control
= &svm
->vmcb
->control
;
4749 control
->exit_int_info
= control
->event_inj
;
4750 control
->exit_int_info_err
= control
->event_inj_err
;
4751 control
->event_inj
= 0;
4752 svm_complete_interrupts(svm
);
4755 static void svm_vcpu_run(struct kvm_vcpu
*vcpu
)
4757 struct vcpu_svm
*svm
= to_svm(vcpu
);
4759 svm
->vmcb
->save
.rax
= vcpu
->arch
.regs
[VCPU_REGS_RAX
];
4760 svm
->vmcb
->save
.rsp
= vcpu
->arch
.regs
[VCPU_REGS_RSP
];
4761 svm
->vmcb
->save
.rip
= vcpu
->arch
.regs
[VCPU_REGS_RIP
];
4764 * A vmexit emulation is required before the vcpu can be executed
4767 if (unlikely(svm
->nested
.exit_required
))
4772 sync_lapic_to_cr8(vcpu
);
4774 svm
->vmcb
->save
.cr2
= vcpu
->arch
.cr2
;
4781 "push %%" _ASM_BP
"; \n\t"
4782 "mov %c[rbx](%[svm]), %%" _ASM_BX
" \n\t"
4783 "mov %c[rcx](%[svm]), %%" _ASM_CX
" \n\t"
4784 "mov %c[rdx](%[svm]), %%" _ASM_DX
" \n\t"
4785 "mov %c[rsi](%[svm]), %%" _ASM_SI
" \n\t"
4786 "mov %c[rdi](%[svm]), %%" _ASM_DI
" \n\t"
4787 "mov %c[rbp](%[svm]), %%" _ASM_BP
" \n\t"
4788 #ifdef CONFIG_X86_64
4789 "mov %c[r8](%[svm]), %%r8 \n\t"
4790 "mov %c[r9](%[svm]), %%r9 \n\t"
4791 "mov %c[r10](%[svm]), %%r10 \n\t"
4792 "mov %c[r11](%[svm]), %%r11 \n\t"
4793 "mov %c[r12](%[svm]), %%r12 \n\t"
4794 "mov %c[r13](%[svm]), %%r13 \n\t"
4795 "mov %c[r14](%[svm]), %%r14 \n\t"
4796 "mov %c[r15](%[svm]), %%r15 \n\t"
4799 /* Enter guest mode */
4800 "push %%" _ASM_AX
" \n\t"
4801 "mov %c[vmcb](%[svm]), %%" _ASM_AX
" \n\t"
4802 __ex(SVM_VMLOAD
) "\n\t"
4803 __ex(SVM_VMRUN
) "\n\t"
4804 __ex(SVM_VMSAVE
) "\n\t"
4805 "pop %%" _ASM_AX
" \n\t"
4807 /* Save guest registers, load host registers */
4808 "mov %%" _ASM_BX
", %c[rbx](%[svm]) \n\t"
4809 "mov %%" _ASM_CX
", %c[rcx](%[svm]) \n\t"
4810 "mov %%" _ASM_DX
", %c[rdx](%[svm]) \n\t"
4811 "mov %%" _ASM_SI
", %c[rsi](%[svm]) \n\t"
4812 "mov %%" _ASM_DI
", %c[rdi](%[svm]) \n\t"
4813 "mov %%" _ASM_BP
", %c[rbp](%[svm]) \n\t"
4814 #ifdef CONFIG_X86_64
4815 "mov %%r8, %c[r8](%[svm]) \n\t"
4816 "mov %%r9, %c[r9](%[svm]) \n\t"
4817 "mov %%r10, %c[r10](%[svm]) \n\t"
4818 "mov %%r11, %c[r11](%[svm]) \n\t"
4819 "mov %%r12, %c[r12](%[svm]) \n\t"
4820 "mov %%r13, %c[r13](%[svm]) \n\t"
4821 "mov %%r14, %c[r14](%[svm]) \n\t"
4822 "mov %%r15, %c[r15](%[svm]) \n\t"
4827 [vmcb
]"i"(offsetof(struct vcpu_svm
, vmcb_pa
)),
4828 [rbx
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_RBX
])),
4829 [rcx
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_RCX
])),
4830 [rdx
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_RDX
])),
4831 [rsi
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_RSI
])),
4832 [rdi
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_RDI
])),
4833 [rbp
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_RBP
]))
4834 #ifdef CONFIG_X86_64
4835 , [r8
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_R8
])),
4836 [r9
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_R9
])),
4837 [r10
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_R10
])),
4838 [r11
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_R11
])),
4839 [r12
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_R12
])),
4840 [r13
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_R13
])),
4841 [r14
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_R14
])),
4842 [r15
]"i"(offsetof(struct vcpu_svm
, vcpu
.arch
.regs
[VCPU_REGS_R15
]))
4845 #ifdef CONFIG_X86_64
4846 , "rbx", "rcx", "rdx", "rsi", "rdi"
4847 , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
4849 , "ebx", "ecx", "edx", "esi", "edi"
4853 #ifdef CONFIG_X86_64
4854 wrmsrl(MSR_GS_BASE
, svm
->host
.gs_base
);
4856 loadsegment(fs
, svm
->host
.fs
);
4857 #ifndef CONFIG_X86_32_LAZY_GS
4858 loadsegment(gs
, svm
->host
.gs
);
4864 local_irq_disable();
4866 vcpu
->arch
.cr2
= svm
->vmcb
->save
.cr2
;
4867 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = svm
->vmcb
->save
.rax
;
4868 vcpu
->arch
.regs
[VCPU_REGS_RSP
] = svm
->vmcb
->save
.rsp
;
4869 vcpu
->arch
.regs
[VCPU_REGS_RIP
] = svm
->vmcb
->save
.rip
;
4871 if (unlikely(svm
->vmcb
->control
.exit_code
== SVM_EXIT_NMI
))
4872 kvm_before_handle_nmi(&svm
->vcpu
);
4876 /* Any pending NMI will happen here */
4878 if (unlikely(svm
->vmcb
->control
.exit_code
== SVM_EXIT_NMI
))
4879 kvm_after_handle_nmi(&svm
->vcpu
);
4881 sync_cr8_to_lapic(vcpu
);
4885 svm
->vmcb
->control
.tlb_ctl
= TLB_CONTROL_DO_NOTHING
;
4887 /* if exit due to PF check for async PF */
4888 if (svm
->vmcb
->control
.exit_code
== SVM_EXIT_EXCP_BASE
+ PF_VECTOR
)
4889 svm
->apf_reason
= kvm_read_and_reset_pf_reason();
4892 vcpu
->arch
.regs_avail
&= ~(1 << VCPU_EXREG_PDPTR
);
4893 vcpu
->arch
.regs_dirty
&= ~(1 << VCPU_EXREG_PDPTR
);
4897 * We need to handle MC intercepts here before the vcpu has a chance to
4898 * change the physical cpu
4900 if (unlikely(svm
->vmcb
->control
.exit_code
==
4901 SVM_EXIT_EXCP_BASE
+ MC_VECTOR
))
4902 svm_handle_mce(svm
);
4904 mark_all_clean(svm
->vmcb
);
4907 static void svm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long root
)
4909 struct vcpu_svm
*svm
= to_svm(vcpu
);
4911 svm
->vmcb
->save
.cr3
= root
;
4912 mark_dirty(svm
->vmcb
, VMCB_CR
);
4913 svm_flush_tlb(vcpu
);
4916 static void set_tdp_cr3(struct kvm_vcpu
*vcpu
, unsigned long root
)
4918 struct vcpu_svm
*svm
= to_svm(vcpu
);
4920 svm
->vmcb
->control
.nested_cr3
= root
;
4921 mark_dirty(svm
->vmcb
, VMCB_NPT
);
4923 /* Also sync guest cr3 here in case we live migrate */
4924 svm
->vmcb
->save
.cr3
= kvm_read_cr3(vcpu
);
4925 mark_dirty(svm
->vmcb
, VMCB_CR
);
4927 svm_flush_tlb(vcpu
);
4930 static int is_disabled(void)
4934 rdmsrl(MSR_VM_CR
, vm_cr
);
4935 if (vm_cr
& (1 << SVM_VM_CR_SVM_DISABLE
))
4942 svm_patch_hypercall(struct kvm_vcpu
*vcpu
, unsigned char *hypercall
)
4945 * Patch in the VMMCALL instruction:
4947 hypercall
[0] = 0x0f;
4948 hypercall
[1] = 0x01;
4949 hypercall
[2] = 0xd9;
4952 static void svm_check_processor_compat(void *rtn
)
4957 static bool svm_cpu_has_accelerated_tpr(void)
4962 static bool svm_has_high_real_mode_segbase(void)
4967 static u64
svm_get_mt_mask(struct kvm_vcpu
*vcpu
, gfn_t gfn
, bool is_mmio
)
4972 static void svm_cpuid_update(struct kvm_vcpu
*vcpu
)
4974 struct vcpu_svm
*svm
= to_svm(vcpu
);
4975 struct kvm_cpuid_entry2
*entry
;
4977 /* Update nrips enabled cache */
4978 svm
->nrips_enabled
= !!guest_cpuid_has_nrips(&svm
->vcpu
);
4980 if (!kvm_vcpu_apicv_active(vcpu
))
4983 entry
= kvm_find_cpuid_entry(vcpu
, 1, 0);
4985 entry
->ecx
&= ~bit(X86_FEATURE_X2APIC
);
4988 static void svm_set_supported_cpuid(u32 func
, struct kvm_cpuid_entry2
*entry
)
4993 entry
->ecx
&= ~bit(X86_FEATURE_X2APIC
);
4997 entry
->ecx
|= (1 << 2); /* Set SVM bit */
5000 entry
->eax
= 1; /* SVM revision 1 */
5001 entry
->ebx
= 8; /* Lets support 8 ASIDs in case we add proper
5002 ASID emulation to nested SVM */
5003 entry
->ecx
= 0; /* Reserved */
5004 entry
->edx
= 0; /* Per default do not support any
5005 additional features */
5007 /* Support next_rip if host supports it */
5008 if (boot_cpu_has(X86_FEATURE_NRIPS
))
5009 entry
->edx
|= SVM_FEATURE_NRIP
;
5011 /* Support NPT for the guest if enabled */
5013 entry
->edx
|= SVM_FEATURE_NPT
;
5019 static int svm_get_lpage_level(void)
5021 return PT_PDPE_LEVEL
;
5024 static bool svm_rdtscp_supported(void)
5026 return boot_cpu_has(X86_FEATURE_RDTSCP
);
5029 static bool svm_invpcid_supported(void)
5034 static bool svm_mpx_supported(void)
5039 static bool svm_xsaves_supported(void)
5044 static bool svm_has_wbinvd_exit(void)
5049 #define PRE_EX(exit) { .exit_code = (exit), \
5050 .stage = X86_ICPT_PRE_EXCEPT, }
5051 #define POST_EX(exit) { .exit_code = (exit), \
5052 .stage = X86_ICPT_POST_EXCEPT, }
5053 #define POST_MEM(exit) { .exit_code = (exit), \
5054 .stage = X86_ICPT_POST_MEMACCESS, }
5056 static const struct __x86_intercept
{
5058 enum x86_intercept_stage stage
;
5059 } x86_intercept_map
[] = {
5060 [x86_intercept_cr_read
] = POST_EX(SVM_EXIT_READ_CR0
),
5061 [x86_intercept_cr_write
] = POST_EX(SVM_EXIT_WRITE_CR0
),
5062 [x86_intercept_clts
] = POST_EX(SVM_EXIT_WRITE_CR0
),
5063 [x86_intercept_lmsw
] = POST_EX(SVM_EXIT_WRITE_CR0
),
5064 [x86_intercept_smsw
] = POST_EX(SVM_EXIT_READ_CR0
),
5065 [x86_intercept_dr_read
] = POST_EX(SVM_EXIT_READ_DR0
),
5066 [x86_intercept_dr_write
] = POST_EX(SVM_EXIT_WRITE_DR0
),
5067 [x86_intercept_sldt
] = POST_EX(SVM_EXIT_LDTR_READ
),
5068 [x86_intercept_str
] = POST_EX(SVM_EXIT_TR_READ
),
5069 [x86_intercept_lldt
] = POST_EX(SVM_EXIT_LDTR_WRITE
),
5070 [x86_intercept_ltr
] = POST_EX(SVM_EXIT_TR_WRITE
),
5071 [x86_intercept_sgdt
] = POST_EX(SVM_EXIT_GDTR_READ
),
5072 [x86_intercept_sidt
] = POST_EX(SVM_EXIT_IDTR_READ
),
5073 [x86_intercept_lgdt
] = POST_EX(SVM_EXIT_GDTR_WRITE
),
5074 [x86_intercept_lidt
] = POST_EX(SVM_EXIT_IDTR_WRITE
),
5075 [x86_intercept_vmrun
] = POST_EX(SVM_EXIT_VMRUN
),
5076 [x86_intercept_vmmcall
] = POST_EX(SVM_EXIT_VMMCALL
),
5077 [x86_intercept_vmload
] = POST_EX(SVM_EXIT_VMLOAD
),
5078 [x86_intercept_vmsave
] = POST_EX(SVM_EXIT_VMSAVE
),
5079 [x86_intercept_stgi
] = POST_EX(SVM_EXIT_STGI
),
5080 [x86_intercept_clgi
] = POST_EX(SVM_EXIT_CLGI
),
5081 [x86_intercept_skinit
] = POST_EX(SVM_EXIT_SKINIT
),
5082 [x86_intercept_invlpga
] = POST_EX(SVM_EXIT_INVLPGA
),
5083 [x86_intercept_rdtscp
] = POST_EX(SVM_EXIT_RDTSCP
),
5084 [x86_intercept_monitor
] = POST_MEM(SVM_EXIT_MONITOR
),
5085 [x86_intercept_mwait
] = POST_EX(SVM_EXIT_MWAIT
),
5086 [x86_intercept_invlpg
] = POST_EX(SVM_EXIT_INVLPG
),
5087 [x86_intercept_invd
] = POST_EX(SVM_EXIT_INVD
),
5088 [x86_intercept_wbinvd
] = POST_EX(SVM_EXIT_WBINVD
),
5089 [x86_intercept_wrmsr
] = POST_EX(SVM_EXIT_MSR
),
5090 [x86_intercept_rdtsc
] = POST_EX(SVM_EXIT_RDTSC
),
5091 [x86_intercept_rdmsr
] = POST_EX(SVM_EXIT_MSR
),
5092 [x86_intercept_rdpmc
] = POST_EX(SVM_EXIT_RDPMC
),
5093 [x86_intercept_cpuid
] = PRE_EX(SVM_EXIT_CPUID
),
5094 [x86_intercept_rsm
] = PRE_EX(SVM_EXIT_RSM
),
5095 [x86_intercept_pause
] = PRE_EX(SVM_EXIT_PAUSE
),
5096 [x86_intercept_pushf
] = PRE_EX(SVM_EXIT_PUSHF
),
5097 [x86_intercept_popf
] = PRE_EX(SVM_EXIT_POPF
),
5098 [x86_intercept_intn
] = PRE_EX(SVM_EXIT_SWINT
),
5099 [x86_intercept_iret
] = PRE_EX(SVM_EXIT_IRET
),
5100 [x86_intercept_icebp
] = PRE_EX(SVM_EXIT_ICEBP
),
5101 [x86_intercept_hlt
] = POST_EX(SVM_EXIT_HLT
),
5102 [x86_intercept_in
] = POST_EX(SVM_EXIT_IOIO
),
5103 [x86_intercept_ins
] = POST_EX(SVM_EXIT_IOIO
),
5104 [x86_intercept_out
] = POST_EX(SVM_EXIT_IOIO
),
5105 [x86_intercept_outs
] = POST_EX(SVM_EXIT_IOIO
),
5112 static int svm_check_intercept(struct kvm_vcpu
*vcpu
,
5113 struct x86_instruction_info
*info
,
5114 enum x86_intercept_stage stage
)
5116 struct vcpu_svm
*svm
= to_svm(vcpu
);
5117 int vmexit
, ret
= X86EMUL_CONTINUE
;
5118 struct __x86_intercept icpt_info
;
5119 struct vmcb
*vmcb
= svm
->vmcb
;
5121 if (info
->intercept
>= ARRAY_SIZE(x86_intercept_map
))
5124 icpt_info
= x86_intercept_map
[info
->intercept
];
5126 if (stage
!= icpt_info
.stage
)
5129 switch (icpt_info
.exit_code
) {
5130 case SVM_EXIT_READ_CR0
:
5131 if (info
->intercept
== x86_intercept_cr_read
)
5132 icpt_info
.exit_code
+= info
->modrm_reg
;
5134 case SVM_EXIT_WRITE_CR0
: {
5135 unsigned long cr0
, val
;
5138 if (info
->intercept
== x86_intercept_cr_write
)
5139 icpt_info
.exit_code
+= info
->modrm_reg
;
5141 if (icpt_info
.exit_code
!= SVM_EXIT_WRITE_CR0
||
5142 info
->intercept
== x86_intercept_clts
)
5145 intercept
= svm
->nested
.intercept
;
5147 if (!(intercept
& (1ULL << INTERCEPT_SELECTIVE_CR0
)))
5150 cr0
= vcpu
->arch
.cr0
& ~SVM_CR0_SELECTIVE_MASK
;
5151 val
= info
->src_val
& ~SVM_CR0_SELECTIVE_MASK
;
5153 if (info
->intercept
== x86_intercept_lmsw
) {
5156 /* lmsw can't clear PE - catch this here */
5157 if (cr0
& X86_CR0_PE
)
5162 icpt_info
.exit_code
= SVM_EXIT_CR0_SEL_WRITE
;
5166 case SVM_EXIT_READ_DR0
:
5167 case SVM_EXIT_WRITE_DR0
:
5168 icpt_info
.exit_code
+= info
->modrm_reg
;
5171 if (info
->intercept
== x86_intercept_wrmsr
)
5172 vmcb
->control
.exit_info_1
= 1;
5174 vmcb
->control
.exit_info_1
= 0;
5176 case SVM_EXIT_PAUSE
:
5178 * We get this for NOP only, but pause
5179 * is rep not, check this here
5181 if (info
->rep_prefix
!= REPE_PREFIX
)
5183 case SVM_EXIT_IOIO
: {
5187 if (info
->intercept
== x86_intercept_in
||
5188 info
->intercept
== x86_intercept_ins
) {
5189 exit_info
= ((info
->src_val
& 0xffff) << 16) |
5191 bytes
= info
->dst_bytes
;
5193 exit_info
= (info
->dst_val
& 0xffff) << 16;
5194 bytes
= info
->src_bytes
;
5197 if (info
->intercept
== x86_intercept_outs
||
5198 info
->intercept
== x86_intercept_ins
)
5199 exit_info
|= SVM_IOIO_STR_MASK
;
5201 if (info
->rep_prefix
)
5202 exit_info
|= SVM_IOIO_REP_MASK
;
5204 bytes
= min(bytes
, 4u);
5206 exit_info
|= bytes
<< SVM_IOIO_SIZE_SHIFT
;
5208 exit_info
|= (u32
)info
->ad_bytes
<< (SVM_IOIO_ASIZE_SHIFT
- 1);
5210 vmcb
->control
.exit_info_1
= exit_info
;
5211 vmcb
->control
.exit_info_2
= info
->next_rip
;
5219 /* TODO: Advertise NRIPS to guest hypervisor unconditionally */
5220 if (static_cpu_has(X86_FEATURE_NRIPS
))
5221 vmcb
->control
.next_rip
= info
->next_rip
;
5222 vmcb
->control
.exit_code
= icpt_info
.exit_code
;
5223 vmexit
= nested_svm_exit_handled(svm
);
5225 ret
= (vmexit
== NESTED_EXIT_DONE
) ? X86EMUL_INTERCEPTED
5232 static void svm_handle_external_intr(struct kvm_vcpu
*vcpu
)
5236 * We must have an instruction with interrupts enabled, so
5237 * the timer interrupt isn't delayed by the interrupt shadow.
5240 local_irq_disable();
5243 static void svm_sched_in(struct kvm_vcpu
*vcpu
, int cpu
)
5247 static inline void avic_post_state_restore(struct kvm_vcpu
*vcpu
)
5249 if (avic_handle_apic_id_update(vcpu
) != 0)
5251 if (avic_handle_dfr_update(vcpu
) != 0)
5253 avic_handle_ldr_update(vcpu
);
5256 static struct kvm_x86_ops svm_x86_ops __ro_after_init
= {
5257 .cpu_has_kvm_support
= has_svm
,
5258 .disabled_by_bios
= is_disabled
,
5259 .hardware_setup
= svm_hardware_setup
,
5260 .hardware_unsetup
= svm_hardware_unsetup
,
5261 .check_processor_compatibility
= svm_check_processor_compat
,
5262 .hardware_enable
= svm_hardware_enable
,
5263 .hardware_disable
= svm_hardware_disable
,
5264 .cpu_has_accelerated_tpr
= svm_cpu_has_accelerated_tpr
,
5265 .cpu_has_high_real_mode_segbase
= svm_has_high_real_mode_segbase
,
5267 .vcpu_create
= svm_create_vcpu
,
5268 .vcpu_free
= svm_free_vcpu
,
5269 .vcpu_reset
= svm_vcpu_reset
,
5271 .vm_init
= avic_vm_init
,
5272 .vm_destroy
= avic_vm_destroy
,
5274 .prepare_guest_switch
= svm_prepare_guest_switch
,
5275 .vcpu_load
= svm_vcpu_load
,
5276 .vcpu_put
= svm_vcpu_put
,
5277 .vcpu_blocking
= svm_vcpu_blocking
,
5278 .vcpu_unblocking
= svm_vcpu_unblocking
,
5280 .update_bp_intercept
= update_bp_intercept
,
5281 .get_msr
= svm_get_msr
,
5282 .set_msr
= svm_set_msr
,
5283 .get_segment_base
= svm_get_segment_base
,
5284 .get_segment
= svm_get_segment
,
5285 .set_segment
= svm_set_segment
,
5286 .get_cpl
= svm_get_cpl
,
5287 .get_cs_db_l_bits
= kvm_get_cs_db_l_bits
,
5288 .decache_cr0_guest_bits
= svm_decache_cr0_guest_bits
,
5289 .decache_cr3
= svm_decache_cr3
,
5290 .decache_cr4_guest_bits
= svm_decache_cr4_guest_bits
,
5291 .set_cr0
= svm_set_cr0
,
5292 .set_cr3
= svm_set_cr3
,
5293 .set_cr4
= svm_set_cr4
,
5294 .set_efer
= svm_set_efer
,
5295 .get_idt
= svm_get_idt
,
5296 .set_idt
= svm_set_idt
,
5297 .get_gdt
= svm_get_gdt
,
5298 .set_gdt
= svm_set_gdt
,
5299 .get_dr6
= svm_get_dr6
,
5300 .set_dr6
= svm_set_dr6
,
5301 .set_dr7
= svm_set_dr7
,
5302 .sync_dirty_debug_regs
= svm_sync_dirty_debug_regs
,
5303 .cache_reg
= svm_cache_reg
,
5304 .get_rflags
= svm_get_rflags
,
5305 .set_rflags
= svm_set_rflags
,
5307 .get_pkru
= svm_get_pkru
,
5309 .tlb_flush
= svm_flush_tlb
,
5311 .run
= svm_vcpu_run
,
5312 .handle_exit
= handle_exit
,
5313 .skip_emulated_instruction
= skip_emulated_instruction
,
5314 .set_interrupt_shadow
= svm_set_interrupt_shadow
,
5315 .get_interrupt_shadow
= svm_get_interrupt_shadow
,
5316 .patch_hypercall
= svm_patch_hypercall
,
5317 .set_irq
= svm_set_irq
,
5318 .set_nmi
= svm_inject_nmi
,
5319 .queue_exception
= svm_queue_exception
,
5320 .cancel_injection
= svm_cancel_injection
,
5321 .interrupt_allowed
= svm_interrupt_allowed
,
5322 .nmi_allowed
= svm_nmi_allowed
,
5323 .get_nmi_mask
= svm_get_nmi_mask
,
5324 .set_nmi_mask
= svm_set_nmi_mask
,
5325 .enable_nmi_window
= enable_nmi_window
,
5326 .enable_irq_window
= enable_irq_window
,
5327 .update_cr8_intercept
= update_cr8_intercept
,
5328 .set_virtual_x2apic_mode
= svm_set_virtual_x2apic_mode
,
5329 .get_enable_apicv
= svm_get_enable_apicv
,
5330 .refresh_apicv_exec_ctrl
= svm_refresh_apicv_exec_ctrl
,
5331 .load_eoi_exitmap
= svm_load_eoi_exitmap
,
5332 .hwapic_irr_update
= svm_hwapic_irr_update
,
5333 .hwapic_isr_update
= svm_hwapic_isr_update
,
5334 .apicv_post_state_restore
= avic_post_state_restore
,
5336 .set_tss_addr
= svm_set_tss_addr
,
5337 .get_tdp_level
= get_npt_level
,
5338 .get_mt_mask
= svm_get_mt_mask
,
5340 .get_exit_info
= svm_get_exit_info
,
5342 .get_lpage_level
= svm_get_lpage_level
,
5344 .cpuid_update
= svm_cpuid_update
,
5346 .rdtscp_supported
= svm_rdtscp_supported
,
5347 .invpcid_supported
= svm_invpcid_supported
,
5348 .mpx_supported
= svm_mpx_supported
,
5349 .xsaves_supported
= svm_xsaves_supported
,
5351 .set_supported_cpuid
= svm_set_supported_cpuid
,
5353 .has_wbinvd_exit
= svm_has_wbinvd_exit
,
5355 .write_tsc_offset
= svm_write_tsc_offset
,
5357 .set_tdp_cr3
= set_tdp_cr3
,
5359 .check_intercept
= svm_check_intercept
,
5360 .handle_external_intr
= svm_handle_external_intr
,
5362 .sched_in
= svm_sched_in
,
5364 .pmu_ops
= &amd_pmu_ops
,
5365 .deliver_posted_interrupt
= svm_deliver_avic_intr
,
5366 .update_pi_irte
= svm_update_pi_irte
,
5369 static int __init
svm_init(void)
5371 return kvm_init(&svm_x86_ops
, sizeof(struct vcpu_svm
),
5372 __alignof__(struct vcpu_svm
), THIS_MODULE
);
5375 static void __exit
svm_exit(void)
5380 module_init(svm_init
)
5381 module_exit(svm_exit
)