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.
17 #include <linux/kvm_host.h>
21 #include "kvm_cache_regs.h"
25 #include <linux/module.h>
26 #include <linux/mod_devicetable.h>
27 #include <linux/kernel.h>
28 #include <linux/vmalloc.h>
29 #include <linux/highmem.h>
30 #include <linux/sched.h>
31 #include <linux/ftrace_event.h>
32 #include <linux/slab.h>
34 #include <asm/perf_event.h>
35 #include <asm/tlbflush.h>
37 #include <asm/kvm_para.h>
39 #include <asm/virtext.h>
42 #define __ex(x) __kvm_handle_fault_on_reboot(x)
44 MODULE_AUTHOR("Qumranet");
45 MODULE_LICENSE("GPL");
47 static const struct x86_cpu_id svm_cpu_id[] = {
48 X86_FEATURE_MATCH(X86_FEATURE_SVM),
51 MODULE_DEVICE_TABLE(x86cpu, svm_cpu_id);
53 #define IOPM_ALLOC_ORDER 2
54 #define MSRPM_ALLOC_ORDER 1
56 #define SEG_TYPE_LDT 2
57 #define SEG_TYPE_BUSY_TSS16 3
59 #define SVM_FEATURE_NPT (1 << 0)
60 #define SVM_FEATURE_LBRV (1 << 1)
61 #define SVM_FEATURE_SVML (1 << 2)
62 #define SVM_FEATURE_NRIP (1 << 3)
63 #define SVM_FEATURE_TSC_RATE (1 << 4)
64 #define SVM_FEATURE_VMCB_CLEAN (1 << 5)
65 #define SVM_FEATURE_FLUSH_ASID (1 << 6)
66 #define SVM_FEATURE_DECODE_ASSIST (1 << 7)
67 #define SVM_FEATURE_PAUSE_FILTER (1 << 10)
69 #define NESTED_EXIT_HOST 0 /* Exit handled on host level */
70 #define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */
71 #define NESTED_EXIT_CONTINUE 2 /* Further checks needed */
73 #define DEBUGCTL_RESERVED_BITS (~(0x3fULL))
75 #define TSC_RATIO_RSVD 0xffffff0000000000ULL
76 #define TSC_RATIO_MIN 0x0000000000000001ULL
77 #define TSC_RATIO_MAX 0x000000ffffffffffULL
79 static bool erratum_383_found __read_mostly;
81 static const u32 host_save_user_msrs[] = {
83 MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE,
86 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
89 #define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)
99 /* These are the merged vectors */
102 /* gpa pointers to the real vectors */
106 /* A VMEXIT is required but not yet emulated */
109 /* cache for intercepts of the guest */
112 u32 intercept_exceptions;
115 /* Nested Paging related state */
119 #define MSRPM_OFFSETS 16
120 static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;
123 * Set osvw_len to higher value when updated Revision Guides
124 * are published and we know what the new status bits are
126 static uint64_t osvw_len = 4, osvw_status;
129 struct kvm_vcpu vcpu;
131 unsigned long vmcb_pa;
132 struct svm_cpu_data *svm_data;
133 uint64_t asid_generation;
134 uint64_t sysenter_esp;
135 uint64_t sysenter_eip;
139 u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS];
151 struct nested_state nested;
155 unsigned int3_injected;
156 unsigned long int3_rip;
162 static DEFINE_PER_CPU(u64, current_tsc_ratio);
163 #define TSC_RATIO_DEFAULT 0x0100000000ULL
165 #define MSR_INVALID 0xffffffffU
167 static const struct svm_direct_access_msrs {
168 u32 index; /* Index of the MSR */
169 bool always; /* True if intercept is always on */
170 } direct_access_msrs[] = {
171 { .index = MSR_STAR, .always = true },
172 { .index = MSR_IA32_SYSENTER_CS, .always = true },
174 { .index = MSR_GS_BASE, .always = true },
175 { .index = MSR_FS_BASE, .always = true },
176 { .index = MSR_KERNEL_GS_BASE, .always = true },
177 { .index = MSR_LSTAR, .always = true },
178 { .index = MSR_CSTAR, .always = true },
179 { .index = MSR_SYSCALL_MASK, .always = true },
181 { .index = MSR_IA32_LASTBRANCHFROMIP, .always = false },
182 { .index = MSR_IA32_LASTBRANCHTOIP, .always = false },
183 { .index = MSR_IA32_LASTINTFROMIP, .always = false },
184 { .index = MSR_IA32_LASTINTTOIP, .always = false },
185 { .index = MSR_INVALID, .always = false },
188 /* enable NPT for AMD64 and X86 with PAE */
189 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
190 static bool npt_enabled = true;
192 static bool npt_enabled;
195 /* allow nested paging (virtualized MMU) for all guests */
196 static int npt = true;
197 module_param(npt, int, S_IRUGO);
199 /* allow nested virtualization in KVM/SVM */
200 static int nested = true;
201 module_param(nested, int, S_IRUGO);
203 static void svm_flush_tlb(struct kvm_vcpu *vcpu);
204 static void svm_complete_interrupts(struct vcpu_svm *svm);
206 static int nested_svm_exit_handled(struct vcpu_svm *svm);
207 static int nested_svm_intercept(struct vcpu_svm *svm);
208 static int nested_svm_vmexit(struct vcpu_svm *svm);
209 static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
210 bool has_error_code, u32 error_code);
211 static u64 __scale_tsc(u64 ratio, u64 tsc);
214 VMCB_INTERCEPTS, /* Intercept vectors, TSC offset,
215 pause filter count */
216 VMCB_PERM_MAP, /* IOPM Base and MSRPM Base */
217 VMCB_ASID, /* ASID */
218 VMCB_INTR, /* int_ctl, int_vector */
219 VMCB_NPT, /* npt_en, nCR3, gPAT */
220 VMCB_CR, /* CR0, CR3, CR4, EFER */
221 VMCB_DR, /* DR6, DR7 */
222 VMCB_DT, /* GDT, IDT */
223 VMCB_SEG, /* CS, DS, SS, ES, CPL */
224 VMCB_CR2, /* CR2 only */
225 VMCB_LBR, /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */
229 /* TPR and CR2 are always written before VMRUN */
230 #define VMCB_ALWAYS_DIRTY_MASK ((1U << VMCB_INTR) | (1U << VMCB_CR2))
232 static inline void mark_all_dirty(struct vmcb *vmcb)
234 vmcb->control.clean = 0;
237 static inline void mark_all_clean(struct vmcb *vmcb)
239 vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1)
240 & ~VMCB_ALWAYS_DIRTY_MASK;
243 static inline void mark_dirty(struct vmcb *vmcb, int bit)
245 vmcb->control.clean &= ~(1 << bit);
248 static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
250 return container_of(vcpu, struct vcpu_svm, vcpu);
253 static void recalc_intercepts(struct vcpu_svm *svm)
255 struct vmcb_control_area *c, *h;
256 struct nested_state *g;
258 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
260 if (!is_guest_mode(&svm->vcpu))
263 c = &svm->vmcb->control;
264 h = &svm->nested.hsave->control;
267 c->intercept_cr = h->intercept_cr | g->intercept_cr;
268 c->intercept_dr = h->intercept_dr | g->intercept_dr;
269 c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions;
270 c->intercept = h->intercept | g->intercept;
273 static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm)
275 if (is_guest_mode(&svm->vcpu))
276 return svm->nested.hsave;
281 static inline void set_cr_intercept(struct vcpu_svm *svm, int bit)
283 struct vmcb *vmcb = get_host_vmcb(svm);
285 vmcb->control.intercept_cr |= (1U << bit);
287 recalc_intercepts(svm);
290 static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit)
292 struct vmcb *vmcb = get_host_vmcb(svm);
294 vmcb->control.intercept_cr &= ~(1U << bit);
296 recalc_intercepts(svm);
299 static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit)
301 struct vmcb *vmcb = get_host_vmcb(svm);
303 return vmcb->control.intercept_cr & (1U << bit);
306 static inline void set_dr_intercept(struct vcpu_svm *svm, int bit)
308 struct vmcb *vmcb = get_host_vmcb(svm);
310 vmcb->control.intercept_dr |= (1U << bit);
312 recalc_intercepts(svm);
315 static inline void clr_dr_intercept(struct vcpu_svm *svm, int bit)
317 struct vmcb *vmcb = get_host_vmcb(svm);
319 vmcb->control.intercept_dr &= ~(1U << bit);
321 recalc_intercepts(svm);
324 static inline void set_exception_intercept(struct vcpu_svm *svm, int bit)
326 struct vmcb *vmcb = get_host_vmcb(svm);
328 vmcb->control.intercept_exceptions |= (1U << bit);
330 recalc_intercepts(svm);
333 static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit)
335 struct vmcb *vmcb = get_host_vmcb(svm);
337 vmcb->control.intercept_exceptions &= ~(1U << bit);
339 recalc_intercepts(svm);
342 static inline void set_intercept(struct vcpu_svm *svm, int bit)
344 struct vmcb *vmcb = get_host_vmcb(svm);
346 vmcb->control.intercept |= (1ULL << bit);
348 recalc_intercepts(svm);
351 static inline void clr_intercept(struct vcpu_svm *svm, int bit)
353 struct vmcb *vmcb = get_host_vmcb(svm);
355 vmcb->control.intercept &= ~(1ULL << bit);
357 recalc_intercepts(svm);
360 static inline void enable_gif(struct vcpu_svm *svm)
362 svm->vcpu.arch.hflags |= HF_GIF_MASK;
365 static inline void disable_gif(struct vcpu_svm *svm)
367 svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
370 static inline bool gif_set(struct vcpu_svm *svm)
372 return !!(svm->vcpu.arch.hflags & HF_GIF_MASK);
375 static unsigned long iopm_base;
377 struct kvm_ldttss_desc {
380 unsigned base1:8, type:5, dpl:2, p:1;
381 unsigned limit1:4, zero0:3, g:1, base2:8;
384 } __attribute__((packed));
386 struct svm_cpu_data {
392 struct kvm_ldttss_desc *tss_desc;
394 struct page *save_area;
397 static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
399 struct svm_init_data {
404 static const u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
406 #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
407 #define MSRS_RANGE_SIZE 2048
408 #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
410 static u32 svm_msrpm_offset(u32 msr)
415 for (i = 0; i < NUM_MSR_MAPS; i++) {
416 if (msr < msrpm_ranges[i] ||
417 msr >= msrpm_ranges[i] + MSRS_IN_RANGE)
420 offset = (msr - msrpm_ranges[i]) / 4; /* 4 msrs per u8 */
421 offset += (i * MSRS_RANGE_SIZE); /* add range offset */
423 /* Now we have the u8 offset - but need the u32 offset */
427 /* MSR not in any range */
431 #define MAX_INST_SIZE 15
433 static inline void clgi(void)
435 asm volatile (__ex(SVM_CLGI));
438 static inline void stgi(void)
440 asm volatile (__ex(SVM_STGI));
443 static inline void invlpga(unsigned long addr, u32 asid)
445 asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid));
448 static int get_npt_level(void)
451 return PT64_ROOT_LEVEL;
453 return PT32E_ROOT_LEVEL;
457 static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
459 vcpu->arch.efer = efer;
460 if (!npt_enabled && !(efer & EFER_LMA))
463 to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
464 mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
467 static int is_external_interrupt(u32 info)
469 info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
470 return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
473 static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
475 struct vcpu_svm *svm = to_svm(vcpu);
478 if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
479 ret |= KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS;
483 static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
485 struct vcpu_svm *svm = to_svm(vcpu);
488 svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
490 svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK;
494 static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
496 struct vcpu_svm *svm = to_svm(vcpu);
498 if (svm->vmcb->control.next_rip != 0)
499 svm->next_rip = svm->vmcb->control.next_rip;
501 if (!svm->next_rip) {
502 if (emulate_instruction(vcpu, EMULTYPE_SKIP) !=
504 printk(KERN_DEBUG "%s: NOP\n", __func__);
507 if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
508 printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
509 __func__, kvm_rip_read(vcpu), svm->next_rip);
511 kvm_rip_write(vcpu, svm->next_rip);
512 svm_set_interrupt_shadow(vcpu, 0);
515 static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
516 bool has_error_code, u32 error_code,
519 struct vcpu_svm *svm = to_svm(vcpu);
522 * If we are within a nested VM we'd better #VMEXIT and let the guest
523 * handle the exception
526 nested_svm_check_exception(svm, nr, has_error_code, error_code))
529 if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) {
530 unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu);
533 * For guest debugging where we have to reinject #BP if some
534 * INT3 is guest-owned:
535 * Emulate nRIP by moving RIP forward. Will fail if injection
536 * raises a fault that is not intercepted. Still better than
537 * failing in all cases.
539 skip_emulated_instruction(&svm->vcpu);
540 rip = kvm_rip_read(&svm->vcpu);
541 svm->int3_rip = rip + svm->vmcb->save.cs.base;
542 svm->int3_injected = rip - old_rip;
545 svm->vmcb->control.event_inj = nr
547 | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
548 | SVM_EVTINJ_TYPE_EXEPT;
549 svm->vmcb->control.event_inj_err = error_code;
552 static void svm_init_erratum_383(void)
558 if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH))
561 /* Use _safe variants to not break nested virtualization */
562 val = native_read_msr_safe(MSR_AMD64_DC_CFG, &err);
568 low = lower_32_bits(val);
569 high = upper_32_bits(val);
571 native_write_msr_safe(MSR_AMD64_DC_CFG, low, high);
573 erratum_383_found = true;
576 static void svm_init_osvw(struct kvm_vcpu *vcpu)
579 * Guests should see errata 400 and 415 as fixed (assuming that
580 * HLT and IO instructions are intercepted).
582 vcpu->arch.osvw.length = (osvw_len >= 3) ? (osvw_len) : 3;
583 vcpu->arch.osvw.status = osvw_status & ~(6ULL);
586 * By increasing VCPU's osvw.length to 3 we are telling the guest that
587 * all osvw.status bits inside that length, including bit 0 (which is
588 * reserved for erratum 298), are valid. However, if host processor's
589 * osvw_len is 0 then osvw_status[0] carries no information. We need to
590 * be conservative here and therefore we tell the guest that erratum 298
591 * is present (because we really don't know).
593 if (osvw_len == 0 && boot_cpu_data.x86 == 0x10)
594 vcpu->arch.osvw.status |= 1;
597 static int has_svm(void)
601 if (!cpu_has_svm(&msg)) {
602 printk(KERN_INFO "has_svm: %s\n", msg);
609 static void svm_hardware_disable(void *garbage)
611 /* Make sure we clean up behind us */
612 if (static_cpu_has(X86_FEATURE_TSCRATEMSR))
613 wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
617 amd_pmu_disable_virt();
620 static int svm_hardware_enable(void *garbage)
623 struct svm_cpu_data *sd;
625 struct desc_ptr gdt_descr;
626 struct desc_struct *gdt;
627 int me = raw_smp_processor_id();
629 rdmsrl(MSR_EFER, efer);
630 if (efer & EFER_SVME)
634 pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me);
637 sd = per_cpu(svm_data, me);
639 pr_err("%s: svm_data is NULL on %d\n", __func__, me);
643 sd->asid_generation = 1;
644 sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
645 sd->next_asid = sd->max_asid + 1;
647 native_store_gdt(&gdt_descr);
648 gdt = (struct desc_struct *)gdt_descr.address;
649 sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
651 wrmsrl(MSR_EFER, efer | EFER_SVME);
653 wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
655 if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
656 wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
657 __get_cpu_var(current_tsc_ratio) = TSC_RATIO_DEFAULT;
664 * Note that it is possible to have a system with mixed processor
665 * revisions and therefore different OSVW bits. If bits are not the same
666 * on different processors then choose the worst case (i.e. if erratum
667 * is present on one processor and not on another then assume that the
668 * erratum is present everywhere).
670 if (cpu_has(&boot_cpu_data, X86_FEATURE_OSVW)) {
671 uint64_t len, status = 0;
674 len = native_read_msr_safe(MSR_AMD64_OSVW_ID_LENGTH, &err);
676 status = native_read_msr_safe(MSR_AMD64_OSVW_STATUS,
680 osvw_status = osvw_len = 0;
684 osvw_status |= status;
685 osvw_status &= (1ULL << osvw_len) - 1;
688 osvw_status = osvw_len = 0;
690 svm_init_erratum_383();
692 amd_pmu_enable_virt();
697 static void svm_cpu_uninit(int cpu)
699 struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
704 per_cpu(svm_data, raw_smp_processor_id()) = NULL;
705 __free_page(sd->save_area);
709 static int svm_cpu_init(int cpu)
711 struct svm_cpu_data *sd;
714 sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
718 sd->save_area = alloc_page(GFP_KERNEL);
723 per_cpu(svm_data, cpu) = sd;
733 static bool valid_msr_intercept(u32 index)
737 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++)
738 if (direct_access_msrs[i].index == index)
744 static void set_msr_interception(u32 *msrpm, unsigned msr,
747 u8 bit_read, bit_write;
752 * If this warning triggers extend the direct_access_msrs list at the
753 * beginning of the file
755 WARN_ON(!valid_msr_intercept(msr));
757 offset = svm_msrpm_offset(msr);
758 bit_read = 2 * (msr & 0x0f);
759 bit_write = 2 * (msr & 0x0f) + 1;
762 BUG_ON(offset == MSR_INVALID);
764 read ? clear_bit(bit_read, &tmp) : set_bit(bit_read, &tmp);
765 write ? clear_bit(bit_write, &tmp) : set_bit(bit_write, &tmp);
770 static void svm_vcpu_init_msrpm(u32 *msrpm)
774 memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
776 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
777 if (!direct_access_msrs[i].always)
780 set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1);
784 static void add_msr_offset(u32 offset)
788 for (i = 0; i < MSRPM_OFFSETS; ++i) {
790 /* Offset already in list? */
791 if (msrpm_offsets[i] == offset)
794 /* Slot used by another offset? */
795 if (msrpm_offsets[i] != MSR_INVALID)
798 /* Add offset to list */
799 msrpm_offsets[i] = offset;
805 * If this BUG triggers the msrpm_offsets table has an overflow. Just
806 * increase MSRPM_OFFSETS in this case.
811 static void init_msrpm_offsets(void)
815 memset(msrpm_offsets, 0xff, sizeof(msrpm_offsets));
817 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
820 offset = svm_msrpm_offset(direct_access_msrs[i].index);
821 BUG_ON(offset == MSR_INVALID);
823 add_msr_offset(offset);
827 static void svm_enable_lbrv(struct vcpu_svm *svm)
829 u32 *msrpm = svm->msrpm;
831 svm->vmcb->control.lbr_ctl = 1;
832 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1);
833 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1);
834 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
835 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1);
838 static void svm_disable_lbrv(struct vcpu_svm *svm)
840 u32 *msrpm = svm->msrpm;
842 svm->vmcb->control.lbr_ctl = 0;
843 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0);
844 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0);
845 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0);
846 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0);
849 static __init int svm_hardware_setup(void)
852 struct page *iopm_pages;
856 iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
861 iopm_va = page_address(iopm_pages);
862 memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
863 iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
865 init_msrpm_offsets();
867 if (boot_cpu_has(X86_FEATURE_NX))
868 kvm_enable_efer_bits(EFER_NX);
870 if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
871 kvm_enable_efer_bits(EFER_FFXSR);
873 if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
876 kvm_has_tsc_control = true;
879 * Make sure the user can only configure tsc_khz values that
880 * fit into a signed integer.
881 * A min value is not calculated needed because it will always
882 * be 1 on all machines and a value of 0 is used to disable
883 * tsc-scaling for the vcpu.
885 max = min(0x7fffffffULL, __scale_tsc(tsc_khz, TSC_RATIO_MAX));
887 kvm_max_guest_tsc_khz = max;
891 printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
892 kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE);
895 for_each_possible_cpu(cpu) {
896 r = svm_cpu_init(cpu);
901 if (!boot_cpu_has(X86_FEATURE_NPT))
904 if (npt_enabled && !npt) {
905 printk(KERN_INFO "kvm: Nested Paging disabled\n");
910 printk(KERN_INFO "kvm: Nested Paging enabled\n");
918 __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
923 static __exit void svm_hardware_unsetup(void)
927 for_each_possible_cpu(cpu)
930 __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
934 static void init_seg(struct vmcb_seg *seg)
937 seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
938 SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
943 static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
946 seg->attrib = SVM_SELECTOR_P_MASK | type;
951 static u64 __scale_tsc(u64 ratio, u64 tsc)
953 u64 mult, frac, _tsc;
956 frac = ratio & ((1ULL << 32) - 1);
960 _tsc += (tsc >> 32) * frac;
961 _tsc += ((tsc & ((1ULL << 32) - 1)) * frac) >> 32;
966 static u64 svm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc)
968 struct vcpu_svm *svm = to_svm(vcpu);
971 if (svm->tsc_ratio != TSC_RATIO_DEFAULT)
972 _tsc = __scale_tsc(svm->tsc_ratio, tsc);
977 static void svm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale)
979 struct vcpu_svm *svm = to_svm(vcpu);
983 /* Guest TSC same frequency as host TSC? */
985 svm->tsc_ratio = TSC_RATIO_DEFAULT;
989 /* TSC scaling supported? */
990 if (!boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
991 if (user_tsc_khz > tsc_khz) {
992 vcpu->arch.tsc_catchup = 1;
993 vcpu->arch.tsc_always_catchup = 1;
995 WARN(1, "user requested TSC rate below hardware speed\n");
1001 /* TSC scaling required - calculate ratio */
1003 do_div(ratio, tsc_khz);
1005 if (ratio == 0 || ratio & TSC_RATIO_RSVD) {
1006 WARN_ONCE(1, "Invalid TSC ratio - virtual-tsc-khz=%u\n",
1010 svm->tsc_ratio = ratio;
1013 static u64 svm_read_tsc_offset(struct kvm_vcpu *vcpu)
1015 struct vcpu_svm *svm = to_svm(vcpu);
1017 return svm->vmcb->control.tsc_offset;
1020 static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
1022 struct vcpu_svm *svm = to_svm(vcpu);
1023 u64 g_tsc_offset = 0;
1025 if (is_guest_mode(vcpu)) {
1026 g_tsc_offset = svm->vmcb->control.tsc_offset -
1027 svm->nested.hsave->control.tsc_offset;
1028 svm->nested.hsave->control.tsc_offset = offset;
1031 svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
1033 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
1036 static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment, bool host)
1038 struct vcpu_svm *svm = to_svm(vcpu);
1040 WARN_ON(adjustment < 0);
1042 adjustment = svm_scale_tsc(vcpu, adjustment);
1044 svm->vmcb->control.tsc_offset += adjustment;
1045 if (is_guest_mode(vcpu))
1046 svm->nested.hsave->control.tsc_offset += adjustment;
1047 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
1050 static u64 svm_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc)
1054 tsc = svm_scale_tsc(vcpu, native_read_tsc());
1056 return target_tsc - tsc;
1059 static void init_vmcb(struct vcpu_svm *svm)
1061 struct vmcb_control_area *control = &svm->vmcb->control;
1062 struct vmcb_save_area *save = &svm->vmcb->save;
1064 svm->vcpu.fpu_active = 1;
1065 svm->vcpu.arch.hflags = 0;
1067 set_cr_intercept(svm, INTERCEPT_CR0_READ);
1068 set_cr_intercept(svm, INTERCEPT_CR3_READ);
1069 set_cr_intercept(svm, INTERCEPT_CR4_READ);
1070 set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
1071 set_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1072 set_cr_intercept(svm, INTERCEPT_CR4_WRITE);
1073 set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
1075 set_dr_intercept(svm, INTERCEPT_DR0_READ);
1076 set_dr_intercept(svm, INTERCEPT_DR1_READ);
1077 set_dr_intercept(svm, INTERCEPT_DR2_READ);
1078 set_dr_intercept(svm, INTERCEPT_DR3_READ);
1079 set_dr_intercept(svm, INTERCEPT_DR4_READ);
1080 set_dr_intercept(svm, INTERCEPT_DR5_READ);
1081 set_dr_intercept(svm, INTERCEPT_DR6_READ);
1082 set_dr_intercept(svm, INTERCEPT_DR7_READ);
1084 set_dr_intercept(svm, INTERCEPT_DR0_WRITE);
1085 set_dr_intercept(svm, INTERCEPT_DR1_WRITE);
1086 set_dr_intercept(svm, INTERCEPT_DR2_WRITE);
1087 set_dr_intercept(svm, INTERCEPT_DR3_WRITE);
1088 set_dr_intercept(svm, INTERCEPT_DR4_WRITE);
1089 set_dr_intercept(svm, INTERCEPT_DR5_WRITE);
1090 set_dr_intercept(svm, INTERCEPT_DR6_WRITE);
1091 set_dr_intercept(svm, INTERCEPT_DR7_WRITE);
1093 set_exception_intercept(svm, PF_VECTOR);
1094 set_exception_intercept(svm, UD_VECTOR);
1095 set_exception_intercept(svm, MC_VECTOR);
1097 set_intercept(svm, INTERCEPT_INTR);
1098 set_intercept(svm, INTERCEPT_NMI);
1099 set_intercept(svm, INTERCEPT_SMI);
1100 set_intercept(svm, INTERCEPT_SELECTIVE_CR0);
1101 set_intercept(svm, INTERCEPT_RDPMC);
1102 set_intercept(svm, INTERCEPT_CPUID);
1103 set_intercept(svm, INTERCEPT_INVD);
1104 set_intercept(svm, INTERCEPT_HLT);
1105 set_intercept(svm, INTERCEPT_INVLPG);
1106 set_intercept(svm, INTERCEPT_INVLPGA);
1107 set_intercept(svm, INTERCEPT_IOIO_PROT);
1108 set_intercept(svm, INTERCEPT_MSR_PROT);
1109 set_intercept(svm, INTERCEPT_TASK_SWITCH);
1110 set_intercept(svm, INTERCEPT_SHUTDOWN);
1111 set_intercept(svm, INTERCEPT_VMRUN);
1112 set_intercept(svm, INTERCEPT_VMMCALL);
1113 set_intercept(svm, INTERCEPT_VMLOAD);
1114 set_intercept(svm, INTERCEPT_VMSAVE);
1115 set_intercept(svm, INTERCEPT_STGI);
1116 set_intercept(svm, INTERCEPT_CLGI);
1117 set_intercept(svm, INTERCEPT_SKINIT);
1118 set_intercept(svm, INTERCEPT_WBINVD);
1119 set_intercept(svm, INTERCEPT_MONITOR);
1120 set_intercept(svm, INTERCEPT_MWAIT);
1121 set_intercept(svm, INTERCEPT_XSETBV);
1123 control->iopm_base_pa = iopm_base;
1124 control->msrpm_base_pa = __pa(svm->msrpm);
1125 control->int_ctl = V_INTR_MASKING_MASK;
1127 init_seg(&save->es);
1128 init_seg(&save->ss);
1129 init_seg(&save->ds);
1130 init_seg(&save->fs);
1131 init_seg(&save->gs);
1133 save->cs.selector = 0xf000;
1134 save->cs.base = 0xffff0000;
1135 /* Executable/Readable Code Segment */
1136 save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
1137 SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
1138 save->cs.limit = 0xffff;
1140 save->gdtr.limit = 0xffff;
1141 save->idtr.limit = 0xffff;
1143 init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
1144 init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
1146 svm_set_efer(&svm->vcpu, 0);
1147 save->dr6 = 0xffff0ff0;
1148 kvm_set_rflags(&svm->vcpu, 2);
1149 save->rip = 0x0000fff0;
1150 svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
1153 * This is the guest-visible cr0 value.
1154 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
1156 svm->vcpu.arch.cr0 = 0;
1157 (void)kvm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET);
1159 save->cr4 = X86_CR4_PAE;
1163 /* Setup VMCB for Nested Paging */
1164 control->nested_ctl = 1;
1165 clr_intercept(svm, INTERCEPT_INVLPG);
1166 clr_exception_intercept(svm, PF_VECTOR);
1167 clr_cr_intercept(svm, INTERCEPT_CR3_READ);
1168 clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1169 save->g_pat = 0x0007040600070406ULL;
1173 svm->asid_generation = 0;
1175 svm->nested.vmcb = 0;
1176 svm->vcpu.arch.hflags = 0;
1178 if (boot_cpu_has(X86_FEATURE_PAUSEFILTER)) {
1179 control->pause_filter_count = 3000;
1180 set_intercept(svm, INTERCEPT_PAUSE);
1183 mark_all_dirty(svm->vmcb);
1188 static void svm_vcpu_reset(struct kvm_vcpu *vcpu)
1190 struct vcpu_svm *svm = to_svm(vcpu);
1196 kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy);
1197 kvm_register_write(vcpu, VCPU_REGS_RDX, eax);
1200 static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
1202 struct vcpu_svm *svm;
1204 struct page *msrpm_pages;
1205 struct page *hsave_page;
1206 struct page *nested_msrpm_pages;
1209 svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
1215 svm->tsc_ratio = TSC_RATIO_DEFAULT;
1217 err = kvm_vcpu_init(&svm->vcpu, kvm, id);
1222 page = alloc_page(GFP_KERNEL);
1226 msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
1230 nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
1231 if (!nested_msrpm_pages)
1234 hsave_page = alloc_page(GFP_KERNEL);
1238 svm->nested.hsave = page_address(hsave_page);
1240 svm->msrpm = page_address(msrpm_pages);
1241 svm_vcpu_init_msrpm(svm->msrpm);
1243 svm->nested.msrpm = page_address(nested_msrpm_pages);
1244 svm_vcpu_init_msrpm(svm->nested.msrpm);
1246 svm->vmcb = page_address(page);
1247 clear_page(svm->vmcb);
1248 svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
1249 svm->asid_generation = 0;
1252 svm->vcpu.arch.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
1253 if (kvm_vcpu_is_bsp(&svm->vcpu))
1254 svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP;
1256 svm_init_osvw(&svm->vcpu);
1261 __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER);
1263 __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
1267 kvm_vcpu_uninit(&svm->vcpu);
1269 kmem_cache_free(kvm_vcpu_cache, svm);
1271 return ERR_PTR(err);
1274 static void svm_free_vcpu(struct kvm_vcpu *vcpu)
1276 struct vcpu_svm *svm = to_svm(vcpu);
1278 __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT));
1279 __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
1280 __free_page(virt_to_page(svm->nested.hsave));
1281 __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER);
1282 kvm_vcpu_uninit(vcpu);
1283 kmem_cache_free(kvm_vcpu_cache, svm);
1286 static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1288 struct vcpu_svm *svm = to_svm(vcpu);
1291 if (unlikely(cpu != vcpu->cpu)) {
1292 svm->asid_generation = 0;
1293 mark_all_dirty(svm->vmcb);
1296 #ifdef CONFIG_X86_64
1297 rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
1299 savesegment(fs, svm->host.fs);
1300 savesegment(gs, svm->host.gs);
1301 svm->host.ldt = kvm_read_ldt();
1303 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
1304 rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
1306 if (static_cpu_has(X86_FEATURE_TSCRATEMSR) &&
1307 svm->tsc_ratio != __get_cpu_var(current_tsc_ratio)) {
1308 __get_cpu_var(current_tsc_ratio) = svm->tsc_ratio;
1309 wrmsrl(MSR_AMD64_TSC_RATIO, svm->tsc_ratio);
1313 static void svm_vcpu_put(struct kvm_vcpu *vcpu)
1315 struct vcpu_svm *svm = to_svm(vcpu);
1318 ++vcpu->stat.host_state_reload;
1319 kvm_load_ldt(svm->host.ldt);
1320 #ifdef CONFIG_X86_64
1321 loadsegment(fs, svm->host.fs);
1322 wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs);
1323 load_gs_index(svm->host.gs);
1325 #ifdef CONFIG_X86_32_LAZY_GS
1326 loadsegment(gs, svm->host.gs);
1329 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
1330 wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
1333 static void svm_update_cpl(struct kvm_vcpu *vcpu)
1335 struct vcpu_svm *svm = to_svm(vcpu);
1338 if (!is_protmode(vcpu))
1340 else if (svm->vmcb->save.rflags & X86_EFLAGS_VM)
1343 cpl = svm->vmcb->save.cs.selector & 0x3;
1345 svm->vmcb->save.cpl = cpl;
1348 static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
1350 return to_svm(vcpu)->vmcb->save.rflags;
1353 static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
1355 unsigned long old_rflags = to_svm(vcpu)->vmcb->save.rflags;
1357 to_svm(vcpu)->vmcb->save.rflags = rflags;
1358 if ((old_rflags ^ rflags) & X86_EFLAGS_VM)
1359 svm_update_cpl(vcpu);
1362 static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
1365 case VCPU_EXREG_PDPTR:
1366 BUG_ON(!npt_enabled);
1367 load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
1374 static void svm_set_vintr(struct vcpu_svm *svm)
1376 set_intercept(svm, INTERCEPT_VINTR);
1379 static void svm_clear_vintr(struct vcpu_svm *svm)
1381 clr_intercept(svm, INTERCEPT_VINTR);
1384 static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
1386 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
1389 case VCPU_SREG_CS: return &save->cs;
1390 case VCPU_SREG_DS: return &save->ds;
1391 case VCPU_SREG_ES: return &save->es;
1392 case VCPU_SREG_FS: return &save->fs;
1393 case VCPU_SREG_GS: return &save->gs;
1394 case VCPU_SREG_SS: return &save->ss;
1395 case VCPU_SREG_TR: return &save->tr;
1396 case VCPU_SREG_LDTR: return &save->ldtr;
1402 static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
1404 struct vmcb_seg *s = svm_seg(vcpu, seg);
1409 static void svm_get_segment(struct kvm_vcpu *vcpu,
1410 struct kvm_segment *var, int seg)
1412 struct vmcb_seg *s = svm_seg(vcpu, seg);
1414 var->base = s->base;
1415 var->limit = s->limit;
1416 var->selector = s->selector;
1417 var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
1418 var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
1419 var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
1420 var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
1421 var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
1422 var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
1423 var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
1424 var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
1427 * AMD's VMCB does not have an explicit unusable field, so emulate it
1428 * for cross vendor migration purposes by "not present"
1430 var->unusable = !var->present || (var->type == 0);
1435 * SVM always stores 0 for the 'G' bit in the CS selector in
1436 * the VMCB on a VMEXIT. This hurts cross-vendor migration:
1437 * Intel's VMENTRY has a check on the 'G' bit.
1439 var->g = s->limit > 0xfffff;
1443 * Work around a bug where the busy flag in the tr selector
1453 * The accessed bit must always be set in the segment
1454 * descriptor cache, although it can be cleared in the
1455 * descriptor, the cached bit always remains at 1. Since
1456 * Intel has a check on this, set it here to support
1457 * cross-vendor migration.
1464 * On AMD CPUs sometimes the DB bit in the segment
1465 * descriptor is left as 1, although the whole segment has
1466 * been made unusable. Clear it here to pass an Intel VMX
1467 * entry check when cross vendor migrating.
1475 static int svm_get_cpl(struct kvm_vcpu *vcpu)
1477 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
1482 static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
1484 struct vcpu_svm *svm = to_svm(vcpu);
1486 dt->size = svm->vmcb->save.idtr.limit;
1487 dt->address = svm->vmcb->save.idtr.base;
1490 static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
1492 struct vcpu_svm *svm = to_svm(vcpu);
1494 svm->vmcb->save.idtr.limit = dt->size;
1495 svm->vmcb->save.idtr.base = dt->address ;
1496 mark_dirty(svm->vmcb, VMCB_DT);
1499 static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
1501 struct vcpu_svm *svm = to_svm(vcpu);
1503 dt->size = svm->vmcb->save.gdtr.limit;
1504 dt->address = svm->vmcb->save.gdtr.base;
1507 static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
1509 struct vcpu_svm *svm = to_svm(vcpu);
1511 svm->vmcb->save.gdtr.limit = dt->size;
1512 svm->vmcb->save.gdtr.base = dt->address ;
1513 mark_dirty(svm->vmcb, VMCB_DT);
1516 static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
1520 static void svm_decache_cr3(struct kvm_vcpu *vcpu)
1524 static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
1528 static void update_cr0_intercept(struct vcpu_svm *svm)
1530 ulong gcr0 = svm->vcpu.arch.cr0;
1531 u64 *hcr0 = &svm->vmcb->save.cr0;
1533 if (!svm->vcpu.fpu_active)
1534 *hcr0 |= SVM_CR0_SELECTIVE_MASK;
1536 *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
1537 | (gcr0 & SVM_CR0_SELECTIVE_MASK);
1539 mark_dirty(svm->vmcb, VMCB_CR);
1541 if (gcr0 == *hcr0 && svm->vcpu.fpu_active) {
1542 clr_cr_intercept(svm, INTERCEPT_CR0_READ);
1543 clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
1545 set_cr_intercept(svm, INTERCEPT_CR0_READ);
1546 set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
1550 static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
1552 struct vcpu_svm *svm = to_svm(vcpu);
1554 #ifdef CONFIG_X86_64
1555 if (vcpu->arch.efer & EFER_LME) {
1556 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
1557 vcpu->arch.efer |= EFER_LMA;
1558 svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
1561 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
1562 vcpu->arch.efer &= ~EFER_LMA;
1563 svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
1567 vcpu->arch.cr0 = cr0;
1570 cr0 |= X86_CR0_PG | X86_CR0_WP;
1572 if (!vcpu->fpu_active)
1575 * re-enable caching here because the QEMU bios
1576 * does not do it - this results in some delay at
1579 cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
1580 svm->vmcb->save.cr0 = cr0;
1581 mark_dirty(svm->vmcb, VMCB_CR);
1582 update_cr0_intercept(svm);
1585 static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
1587 unsigned long host_cr4_mce = read_cr4() & X86_CR4_MCE;
1588 unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;
1590 if (cr4 & X86_CR4_VMXE)
1593 if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
1594 svm_flush_tlb(vcpu);
1596 vcpu->arch.cr4 = cr4;
1599 cr4 |= host_cr4_mce;
1600 to_svm(vcpu)->vmcb->save.cr4 = cr4;
1601 mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
1605 static void svm_set_segment(struct kvm_vcpu *vcpu,
1606 struct kvm_segment *var, int seg)
1608 struct vcpu_svm *svm = to_svm(vcpu);
1609 struct vmcb_seg *s = svm_seg(vcpu, seg);
1611 s->base = var->base;
1612 s->limit = var->limit;
1613 s->selector = var->selector;
1617 s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
1618 s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
1619 s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
1620 s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
1621 s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
1622 s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
1623 s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
1624 s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
1626 if (seg == VCPU_SREG_CS)
1627 svm_update_cpl(vcpu);
1629 mark_dirty(svm->vmcb, VMCB_SEG);
1632 static void update_db_bp_intercept(struct kvm_vcpu *vcpu)
1634 struct vcpu_svm *svm = to_svm(vcpu);
1636 clr_exception_intercept(svm, DB_VECTOR);
1637 clr_exception_intercept(svm, BP_VECTOR);
1639 if (svm->nmi_singlestep)
1640 set_exception_intercept(svm, DB_VECTOR);
1642 if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
1643 if (vcpu->guest_debug &
1644 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
1645 set_exception_intercept(svm, DB_VECTOR);
1646 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
1647 set_exception_intercept(svm, BP_VECTOR);
1649 vcpu->guest_debug = 0;
1652 static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
1654 if (sd->next_asid > sd->max_asid) {
1655 ++sd->asid_generation;
1657 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
1660 svm->asid_generation = sd->asid_generation;
1661 svm->vmcb->control.asid = sd->next_asid++;
1663 mark_dirty(svm->vmcb, VMCB_ASID);
1666 static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
1668 struct vcpu_svm *svm = to_svm(vcpu);
1670 svm->vmcb->save.dr7 = value;
1671 mark_dirty(svm->vmcb, VMCB_DR);
1674 static int pf_interception(struct vcpu_svm *svm)
1676 u64 fault_address = svm->vmcb->control.exit_info_2;
1680 switch (svm->apf_reason) {
1682 error_code = svm->vmcb->control.exit_info_1;
1684 trace_kvm_page_fault(fault_address, error_code);
1685 if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu))
1686 kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address);
1687 r = kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code,
1688 svm->vmcb->control.insn_bytes,
1689 svm->vmcb->control.insn_len);
1691 case KVM_PV_REASON_PAGE_NOT_PRESENT:
1692 svm->apf_reason = 0;
1693 local_irq_disable();
1694 kvm_async_pf_task_wait(fault_address);
1697 case KVM_PV_REASON_PAGE_READY:
1698 svm->apf_reason = 0;
1699 local_irq_disable();
1700 kvm_async_pf_task_wake(fault_address);
1707 static int db_interception(struct vcpu_svm *svm)
1709 struct kvm_run *kvm_run = svm->vcpu.run;
1711 if (!(svm->vcpu.guest_debug &
1712 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
1713 !svm->nmi_singlestep) {
1714 kvm_queue_exception(&svm->vcpu, DB_VECTOR);
1718 if (svm->nmi_singlestep) {
1719 svm->nmi_singlestep = false;
1720 if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP))
1721 svm->vmcb->save.rflags &=
1722 ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
1723 update_db_bp_intercept(&svm->vcpu);
1726 if (svm->vcpu.guest_debug &
1727 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
1728 kvm_run->exit_reason = KVM_EXIT_DEBUG;
1729 kvm_run->debug.arch.pc =
1730 svm->vmcb->save.cs.base + svm->vmcb->save.rip;
1731 kvm_run->debug.arch.exception = DB_VECTOR;
1738 static int bp_interception(struct vcpu_svm *svm)
1740 struct kvm_run *kvm_run = svm->vcpu.run;
1742 kvm_run->exit_reason = KVM_EXIT_DEBUG;
1743 kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip;
1744 kvm_run->debug.arch.exception = BP_VECTOR;
1748 static int ud_interception(struct vcpu_svm *svm)
1752 er = emulate_instruction(&svm->vcpu, EMULTYPE_TRAP_UD);
1753 if (er != EMULATE_DONE)
1754 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
1758 static void svm_fpu_activate(struct kvm_vcpu *vcpu)
1760 struct vcpu_svm *svm = to_svm(vcpu);
1762 clr_exception_intercept(svm, NM_VECTOR);
1764 svm->vcpu.fpu_active = 1;
1765 update_cr0_intercept(svm);
1768 static int nm_interception(struct vcpu_svm *svm)
1770 svm_fpu_activate(&svm->vcpu);
1774 static bool is_erratum_383(void)
1779 if (!erratum_383_found)
1782 value = native_read_msr_safe(MSR_IA32_MC0_STATUS, &err);
1786 /* Bit 62 may or may not be set for this mce */
1787 value &= ~(1ULL << 62);
1789 if (value != 0xb600000000010015ULL)
1792 /* Clear MCi_STATUS registers */
1793 for (i = 0; i < 6; ++i)
1794 native_write_msr_safe(MSR_IA32_MCx_STATUS(i), 0, 0);
1796 value = native_read_msr_safe(MSR_IA32_MCG_STATUS, &err);
1800 value &= ~(1ULL << 2);
1801 low = lower_32_bits(value);
1802 high = upper_32_bits(value);
1804 native_write_msr_safe(MSR_IA32_MCG_STATUS, low, high);
1807 /* Flush tlb to evict multi-match entries */
1813 static void svm_handle_mce(struct vcpu_svm *svm)
1815 if (is_erratum_383()) {
1817 * Erratum 383 triggered. Guest state is corrupt so kill the
1820 pr_err("KVM: Guest triggered AMD Erratum 383\n");
1822 kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
1828 * On an #MC intercept the MCE handler is not called automatically in
1829 * the host. So do it by hand here.
1833 /* not sure if we ever come back to this point */
1838 static int mc_interception(struct vcpu_svm *svm)
1843 static int shutdown_interception(struct vcpu_svm *svm)
1845 struct kvm_run *kvm_run = svm->vcpu.run;
1848 * VMCB is undefined after a SHUTDOWN intercept
1849 * so reinitialize it.
1851 clear_page(svm->vmcb);
1854 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
1858 static int io_interception(struct vcpu_svm *svm)
1860 struct kvm_vcpu *vcpu = &svm->vcpu;
1861 u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
1862 int size, in, string;
1865 ++svm->vcpu.stat.io_exits;
1866 string = (io_info & SVM_IOIO_STR_MASK) != 0;
1867 in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
1869 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
1871 port = io_info >> 16;
1872 size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
1873 svm->next_rip = svm->vmcb->control.exit_info_2;
1874 skip_emulated_instruction(&svm->vcpu);
1876 return kvm_fast_pio_out(vcpu, size, port);
1879 static int nmi_interception(struct vcpu_svm *svm)
1884 static int intr_interception(struct vcpu_svm *svm)
1886 ++svm->vcpu.stat.irq_exits;
1890 static int nop_on_interception(struct vcpu_svm *svm)
1895 static int halt_interception(struct vcpu_svm *svm)
1897 svm->next_rip = kvm_rip_read(&svm->vcpu) + 1;
1898 skip_emulated_instruction(&svm->vcpu);
1899 return kvm_emulate_halt(&svm->vcpu);
1902 static int vmmcall_interception(struct vcpu_svm *svm)
1904 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
1905 skip_emulated_instruction(&svm->vcpu);
1906 kvm_emulate_hypercall(&svm->vcpu);
1910 static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
1912 struct vcpu_svm *svm = to_svm(vcpu);
1914 return svm->nested.nested_cr3;
1917 static u64 nested_svm_get_tdp_pdptr(struct kvm_vcpu *vcpu, int index)
1919 struct vcpu_svm *svm = to_svm(vcpu);
1920 u64 cr3 = svm->nested.nested_cr3;
1924 ret = kvm_read_guest_page(vcpu->kvm, gpa_to_gfn(cr3), &pdpte,
1925 offset_in_page(cr3) + index * 8, 8);
1931 static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
1934 struct vcpu_svm *svm = to_svm(vcpu);
1936 svm->vmcb->control.nested_cr3 = root;
1937 mark_dirty(svm->vmcb, VMCB_NPT);
1938 svm_flush_tlb(vcpu);
1941 static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
1942 struct x86_exception *fault)
1944 struct vcpu_svm *svm = to_svm(vcpu);
1946 svm->vmcb->control.exit_code = SVM_EXIT_NPF;
1947 svm->vmcb->control.exit_code_hi = 0;
1948 svm->vmcb->control.exit_info_1 = fault->error_code;
1949 svm->vmcb->control.exit_info_2 = fault->address;
1951 nested_svm_vmexit(svm);
1954 static int nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
1958 r = kvm_init_shadow_mmu(vcpu, &vcpu->arch.mmu);
1960 vcpu->arch.mmu.set_cr3 = nested_svm_set_tdp_cr3;
1961 vcpu->arch.mmu.get_cr3 = nested_svm_get_tdp_cr3;
1962 vcpu->arch.mmu.get_pdptr = nested_svm_get_tdp_pdptr;
1963 vcpu->arch.mmu.inject_page_fault = nested_svm_inject_npf_exit;
1964 vcpu->arch.mmu.shadow_root_level = get_npt_level();
1965 vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu;
1970 static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
1972 vcpu->arch.walk_mmu = &vcpu->arch.mmu;
1975 static int nested_svm_check_permissions(struct vcpu_svm *svm)
1977 if (!(svm->vcpu.arch.efer & EFER_SVME)
1978 || !is_paging(&svm->vcpu)) {
1979 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
1983 if (svm->vmcb->save.cpl) {
1984 kvm_inject_gp(&svm->vcpu, 0);
1991 static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
1992 bool has_error_code, u32 error_code)
1996 if (!is_guest_mode(&svm->vcpu))
1999 svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
2000 svm->vmcb->control.exit_code_hi = 0;
2001 svm->vmcb->control.exit_info_1 = error_code;
2002 svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
2004 vmexit = nested_svm_intercept(svm);
2005 if (vmexit == NESTED_EXIT_DONE)
2006 svm->nested.exit_required = true;
2011 /* This function returns true if it is save to enable the irq window */
2012 static inline bool nested_svm_intr(struct vcpu_svm *svm)
2014 if (!is_guest_mode(&svm->vcpu))
2017 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
2020 if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
2024 * if vmexit was already requested (by intercepted exception
2025 * for instance) do not overwrite it with "external interrupt"
2028 if (svm->nested.exit_required)
2031 svm->vmcb->control.exit_code = SVM_EXIT_INTR;
2032 svm->vmcb->control.exit_info_1 = 0;
2033 svm->vmcb->control.exit_info_2 = 0;
2035 if (svm->nested.intercept & 1ULL) {
2037 * The #vmexit can't be emulated here directly because this
2038 * code path runs with irqs and preemption disabled. A
2039 * #vmexit emulation might sleep. Only signal request for
2042 svm->nested.exit_required = true;
2043 trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
2050 /* This function returns true if it is save to enable the nmi window */
2051 static inline bool nested_svm_nmi(struct vcpu_svm *svm)
2053 if (!is_guest_mode(&svm->vcpu))
2056 if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI)))
2059 svm->vmcb->control.exit_code = SVM_EXIT_NMI;
2060 svm->nested.exit_required = true;
2065 static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
2071 page = gfn_to_page(svm->vcpu.kvm, gpa >> PAGE_SHIFT);
2072 if (is_error_page(page))
2080 kvm_inject_gp(&svm->vcpu, 0);
2085 static void nested_svm_unmap(struct page *page)
2088 kvm_release_page_dirty(page);
2091 static int nested_svm_intercept_ioio(struct vcpu_svm *svm)
2097 if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT)))
2098 return NESTED_EXIT_HOST;
2100 port = svm->vmcb->control.exit_info_1 >> 16;
2101 gpa = svm->nested.vmcb_iopm + (port / 8);
2105 if (kvm_read_guest(svm->vcpu.kvm, gpa, &val, 1))
2108 return val ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
2111 static int nested_svm_exit_handled_msr(struct vcpu_svm *svm)
2113 u32 offset, msr, value;
2116 if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
2117 return NESTED_EXIT_HOST;
2119 msr = svm->vcpu.arch.regs[VCPU_REGS_RCX];
2120 offset = svm_msrpm_offset(msr);
2121 write = svm->vmcb->control.exit_info_1 & 1;
2122 mask = 1 << ((2 * (msr & 0xf)) + write);
2124 if (offset == MSR_INVALID)
2125 return NESTED_EXIT_DONE;
2127 /* Offset is in 32 bit units but need in 8 bit units */
2130 if (kvm_read_guest(svm->vcpu.kvm, svm->nested.vmcb_msrpm + offset, &value, 4))
2131 return NESTED_EXIT_DONE;
2133 return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
2136 static int nested_svm_exit_special(struct vcpu_svm *svm)
2138 u32 exit_code = svm->vmcb->control.exit_code;
2140 switch (exit_code) {
2143 case SVM_EXIT_EXCP_BASE + MC_VECTOR:
2144 return NESTED_EXIT_HOST;
2146 /* For now we are always handling NPFs when using them */
2148 return NESTED_EXIT_HOST;
2150 case SVM_EXIT_EXCP_BASE + PF_VECTOR:
2151 /* When we're shadowing, trap PFs, but not async PF */
2152 if (!npt_enabled && svm->apf_reason == 0)
2153 return NESTED_EXIT_HOST;
2155 case SVM_EXIT_EXCP_BASE + NM_VECTOR:
2156 nm_interception(svm);
2162 return NESTED_EXIT_CONTINUE;
2166 * If this function returns true, this #vmexit was already handled
2168 static int nested_svm_intercept(struct vcpu_svm *svm)
2170 u32 exit_code = svm->vmcb->control.exit_code;
2171 int vmexit = NESTED_EXIT_HOST;
2173 switch (exit_code) {
2175 vmexit = nested_svm_exit_handled_msr(svm);
2178 vmexit = nested_svm_intercept_ioio(svm);
2180 case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
2181 u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
2182 if (svm->nested.intercept_cr & bit)
2183 vmexit = NESTED_EXIT_DONE;
2186 case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
2187 u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
2188 if (svm->nested.intercept_dr & bit)
2189 vmexit = NESTED_EXIT_DONE;
2192 case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
2193 u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
2194 if (svm->nested.intercept_exceptions & excp_bits)
2195 vmexit = NESTED_EXIT_DONE;
2196 /* async page fault always cause vmexit */
2197 else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
2198 svm->apf_reason != 0)
2199 vmexit = NESTED_EXIT_DONE;
2202 case SVM_EXIT_ERR: {
2203 vmexit = NESTED_EXIT_DONE;
2207 u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
2208 if (svm->nested.intercept & exit_bits)
2209 vmexit = NESTED_EXIT_DONE;
2216 static int nested_svm_exit_handled(struct vcpu_svm *svm)
2220 vmexit = nested_svm_intercept(svm);
2222 if (vmexit == NESTED_EXIT_DONE)
2223 nested_svm_vmexit(svm);
2228 static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb)
2230 struct vmcb_control_area *dst = &dst_vmcb->control;
2231 struct vmcb_control_area *from = &from_vmcb->control;
2233 dst->intercept_cr = from->intercept_cr;
2234 dst->intercept_dr = from->intercept_dr;
2235 dst->intercept_exceptions = from->intercept_exceptions;
2236 dst->intercept = from->intercept;
2237 dst->iopm_base_pa = from->iopm_base_pa;
2238 dst->msrpm_base_pa = from->msrpm_base_pa;
2239 dst->tsc_offset = from->tsc_offset;
2240 dst->asid = from->asid;
2241 dst->tlb_ctl = from->tlb_ctl;
2242 dst->int_ctl = from->int_ctl;
2243 dst->int_vector = from->int_vector;
2244 dst->int_state = from->int_state;
2245 dst->exit_code = from->exit_code;
2246 dst->exit_code_hi = from->exit_code_hi;
2247 dst->exit_info_1 = from->exit_info_1;
2248 dst->exit_info_2 = from->exit_info_2;
2249 dst->exit_int_info = from->exit_int_info;
2250 dst->exit_int_info_err = from->exit_int_info_err;
2251 dst->nested_ctl = from->nested_ctl;
2252 dst->event_inj = from->event_inj;
2253 dst->event_inj_err = from->event_inj_err;
2254 dst->nested_cr3 = from->nested_cr3;
2255 dst->lbr_ctl = from->lbr_ctl;
2258 static int nested_svm_vmexit(struct vcpu_svm *svm)
2260 struct vmcb *nested_vmcb;
2261 struct vmcb *hsave = svm->nested.hsave;
2262 struct vmcb *vmcb = svm->vmcb;
2265 trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
2266 vmcb->control.exit_info_1,
2267 vmcb->control.exit_info_2,
2268 vmcb->control.exit_int_info,
2269 vmcb->control.exit_int_info_err,
2272 nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page);
2276 /* Exit Guest-Mode */
2277 leave_guest_mode(&svm->vcpu);
2278 svm->nested.vmcb = 0;
2280 /* Give the current vmcb to the guest */
2283 nested_vmcb->save.es = vmcb->save.es;
2284 nested_vmcb->save.cs = vmcb->save.cs;
2285 nested_vmcb->save.ss = vmcb->save.ss;
2286 nested_vmcb->save.ds = vmcb->save.ds;
2287 nested_vmcb->save.gdtr = vmcb->save.gdtr;
2288 nested_vmcb->save.idtr = vmcb->save.idtr;
2289 nested_vmcb->save.efer = svm->vcpu.arch.efer;
2290 nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu);
2291 nested_vmcb->save.cr3 = kvm_read_cr3(&svm->vcpu);
2292 nested_vmcb->save.cr2 = vmcb->save.cr2;
2293 nested_vmcb->save.cr4 = svm->vcpu.arch.cr4;
2294 nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
2295 nested_vmcb->save.rip = vmcb->save.rip;
2296 nested_vmcb->save.rsp = vmcb->save.rsp;
2297 nested_vmcb->save.rax = vmcb->save.rax;
2298 nested_vmcb->save.dr7 = vmcb->save.dr7;
2299 nested_vmcb->save.dr6 = vmcb->save.dr6;
2300 nested_vmcb->save.cpl = vmcb->save.cpl;
2302 nested_vmcb->control.int_ctl = vmcb->control.int_ctl;
2303 nested_vmcb->control.int_vector = vmcb->control.int_vector;
2304 nested_vmcb->control.int_state = vmcb->control.int_state;
2305 nested_vmcb->control.exit_code = vmcb->control.exit_code;
2306 nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi;
2307 nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1;
2308 nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2;
2309 nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info;
2310 nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err;
2311 nested_vmcb->control.next_rip = vmcb->control.next_rip;
2314 * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have
2315 * to make sure that we do not lose injected events. So check event_inj
2316 * here and copy it to exit_int_info if it is valid.
2317 * Exit_int_info and event_inj can't be both valid because the case
2318 * below only happens on a VMRUN instruction intercept which has
2319 * no valid exit_int_info set.
2321 if (vmcb->control.event_inj & SVM_EVTINJ_VALID) {
2322 struct vmcb_control_area *nc = &nested_vmcb->control;
2324 nc->exit_int_info = vmcb->control.event_inj;
2325 nc->exit_int_info_err = vmcb->control.event_inj_err;
2328 nested_vmcb->control.tlb_ctl = 0;
2329 nested_vmcb->control.event_inj = 0;
2330 nested_vmcb->control.event_inj_err = 0;
2332 /* We always set V_INTR_MASKING and remember the old value in hflags */
2333 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
2334 nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;
2336 /* Restore the original control entries */
2337 copy_vmcb_control_area(vmcb, hsave);
2339 kvm_clear_exception_queue(&svm->vcpu);
2340 kvm_clear_interrupt_queue(&svm->vcpu);
2342 svm->nested.nested_cr3 = 0;
2344 /* Restore selected save entries */
2345 svm->vmcb->save.es = hsave->save.es;
2346 svm->vmcb->save.cs = hsave->save.cs;
2347 svm->vmcb->save.ss = hsave->save.ss;
2348 svm->vmcb->save.ds = hsave->save.ds;
2349 svm->vmcb->save.gdtr = hsave->save.gdtr;
2350 svm->vmcb->save.idtr = hsave->save.idtr;
2351 kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
2352 svm_set_efer(&svm->vcpu, hsave->save.efer);
2353 svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE);
2354 svm_set_cr4(&svm->vcpu, hsave->save.cr4);
2356 svm->vmcb->save.cr3 = hsave->save.cr3;
2357 svm->vcpu.arch.cr3 = hsave->save.cr3;
2359 (void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
2361 kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax);
2362 kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp);
2363 kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip);
2364 svm->vmcb->save.dr7 = 0;
2365 svm->vmcb->save.cpl = 0;
2366 svm->vmcb->control.exit_int_info = 0;
2368 mark_all_dirty(svm->vmcb);
2370 nested_svm_unmap(page);
2372 nested_svm_uninit_mmu_context(&svm->vcpu);
2373 kvm_mmu_reset_context(&svm->vcpu);
2374 kvm_mmu_load(&svm->vcpu);
2379 static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
2382 * This function merges the msr permission bitmaps of kvm and the
2383 * nested vmcb. It is optimized in that it only merges the parts where
2384 * the kvm msr permission bitmap may contain zero bits
2388 if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
2391 for (i = 0; i < MSRPM_OFFSETS; i++) {
2395 if (msrpm_offsets[i] == 0xffffffff)
2398 p = msrpm_offsets[i];
2399 offset = svm->nested.vmcb_msrpm + (p * 4);
2401 if (kvm_read_guest(svm->vcpu.kvm, offset, &value, 4))
2404 svm->nested.msrpm[p] = svm->msrpm[p] | value;
2407 svm->vmcb->control.msrpm_base_pa = __pa(svm->nested.msrpm);
2412 static bool nested_vmcb_checks(struct vmcb *vmcb)
2414 if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
2417 if (vmcb->control.asid == 0)
2420 if (vmcb->control.nested_ctl && !npt_enabled)
2426 static bool nested_svm_vmrun(struct vcpu_svm *svm)
2428 struct vmcb *nested_vmcb;
2429 struct vmcb *hsave = svm->nested.hsave;
2430 struct vmcb *vmcb = svm->vmcb;
2434 vmcb_gpa = svm->vmcb->save.rax;
2436 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
2440 if (!nested_vmcb_checks(nested_vmcb)) {
2441 nested_vmcb->control.exit_code = SVM_EXIT_ERR;
2442 nested_vmcb->control.exit_code_hi = 0;
2443 nested_vmcb->control.exit_info_1 = 0;
2444 nested_vmcb->control.exit_info_2 = 0;
2446 nested_svm_unmap(page);
2451 trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb_gpa,
2452 nested_vmcb->save.rip,
2453 nested_vmcb->control.int_ctl,
2454 nested_vmcb->control.event_inj,
2455 nested_vmcb->control.nested_ctl);
2457 trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff,
2458 nested_vmcb->control.intercept_cr >> 16,
2459 nested_vmcb->control.intercept_exceptions,
2460 nested_vmcb->control.intercept);
2462 /* Clear internal status */
2463 kvm_clear_exception_queue(&svm->vcpu);
2464 kvm_clear_interrupt_queue(&svm->vcpu);
2467 * Save the old vmcb, so we don't need to pick what we save, but can
2468 * restore everything when a VMEXIT occurs
2470 hsave->save.es = vmcb->save.es;
2471 hsave->save.cs = vmcb->save.cs;
2472 hsave->save.ss = vmcb->save.ss;
2473 hsave->save.ds = vmcb->save.ds;
2474 hsave->save.gdtr = vmcb->save.gdtr;
2475 hsave->save.idtr = vmcb->save.idtr;
2476 hsave->save.efer = svm->vcpu.arch.efer;
2477 hsave->save.cr0 = kvm_read_cr0(&svm->vcpu);
2478 hsave->save.cr4 = svm->vcpu.arch.cr4;
2479 hsave->save.rflags = kvm_get_rflags(&svm->vcpu);
2480 hsave->save.rip = kvm_rip_read(&svm->vcpu);
2481 hsave->save.rsp = vmcb->save.rsp;
2482 hsave->save.rax = vmcb->save.rax;
2484 hsave->save.cr3 = vmcb->save.cr3;
2486 hsave->save.cr3 = kvm_read_cr3(&svm->vcpu);
2488 copy_vmcb_control_area(hsave, vmcb);
2490 if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
2491 svm->vcpu.arch.hflags |= HF_HIF_MASK;
2493 svm->vcpu.arch.hflags &= ~HF_HIF_MASK;
2495 if (nested_vmcb->control.nested_ctl) {
2496 kvm_mmu_unload(&svm->vcpu);
2497 svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
2498 nested_svm_init_mmu_context(&svm->vcpu);
2501 /* Load the nested guest state */
2502 svm->vmcb->save.es = nested_vmcb->save.es;
2503 svm->vmcb->save.cs = nested_vmcb->save.cs;
2504 svm->vmcb->save.ss = nested_vmcb->save.ss;
2505 svm->vmcb->save.ds = nested_vmcb->save.ds;
2506 svm->vmcb->save.gdtr = nested_vmcb->save.gdtr;
2507 svm->vmcb->save.idtr = nested_vmcb->save.idtr;
2508 kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
2509 svm_set_efer(&svm->vcpu, nested_vmcb->save.efer);
2510 svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0);
2511 svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4);
2513 svm->vmcb->save.cr3 = nested_vmcb->save.cr3;
2514 svm->vcpu.arch.cr3 = nested_vmcb->save.cr3;
2516 (void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
2518 /* Guest paging mode is active - reset mmu */
2519 kvm_mmu_reset_context(&svm->vcpu);
2521 svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
2522 kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax);
2523 kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp);
2524 kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip);
2526 /* In case we don't even reach vcpu_run, the fields are not updated */
2527 svm->vmcb->save.rax = nested_vmcb->save.rax;
2528 svm->vmcb->save.rsp = nested_vmcb->save.rsp;
2529 svm->vmcb->save.rip = nested_vmcb->save.rip;
2530 svm->vmcb->save.dr7 = nested_vmcb->save.dr7;
2531 svm->vmcb->save.dr6 = nested_vmcb->save.dr6;
2532 svm->vmcb->save.cpl = nested_vmcb->save.cpl;
2534 svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
2535 svm->nested.vmcb_iopm = nested_vmcb->control.iopm_base_pa & ~0x0fffULL;
2537 /* cache intercepts */
2538 svm->nested.intercept_cr = nested_vmcb->control.intercept_cr;
2539 svm->nested.intercept_dr = nested_vmcb->control.intercept_dr;
2540 svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
2541 svm->nested.intercept = nested_vmcb->control.intercept;
2543 svm_flush_tlb(&svm->vcpu);
2544 svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK;
2545 if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
2546 svm->vcpu.arch.hflags |= HF_VINTR_MASK;
2548 svm->vcpu.arch.hflags &= ~HF_VINTR_MASK;
2550 if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
2551 /* We only want the cr8 intercept bits of the guest */
2552 clr_cr_intercept(svm, INTERCEPT_CR8_READ);
2553 clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
2556 /* We don't want to see VMMCALLs from a nested guest */
2557 clr_intercept(svm, INTERCEPT_VMMCALL);
2559 svm->vmcb->control.lbr_ctl = nested_vmcb->control.lbr_ctl;
2560 svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
2561 svm->vmcb->control.int_state = nested_vmcb->control.int_state;
2562 svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset;
2563 svm->vmcb->control.event_inj = nested_vmcb->control.event_inj;
2564 svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err;
2566 nested_svm_unmap(page);
2568 /* Enter Guest-Mode */
2569 enter_guest_mode(&svm->vcpu);
2572 * Merge guest and host intercepts - must be called with vcpu in
2573 * guest-mode to take affect here
2575 recalc_intercepts(svm);
2577 svm->nested.vmcb = vmcb_gpa;
2581 mark_all_dirty(svm->vmcb);
2586 static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
2588 to_vmcb->save.fs = from_vmcb->save.fs;
2589 to_vmcb->save.gs = from_vmcb->save.gs;
2590 to_vmcb->save.tr = from_vmcb->save.tr;
2591 to_vmcb->save.ldtr = from_vmcb->save.ldtr;
2592 to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base;
2593 to_vmcb->save.star = from_vmcb->save.star;
2594 to_vmcb->save.lstar = from_vmcb->save.lstar;
2595 to_vmcb->save.cstar = from_vmcb->save.cstar;
2596 to_vmcb->save.sfmask = from_vmcb->save.sfmask;
2597 to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs;
2598 to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp;
2599 to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip;
2602 static int vmload_interception(struct vcpu_svm *svm)
2604 struct vmcb *nested_vmcb;
2607 if (nested_svm_check_permissions(svm))
2610 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
2614 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2615 skip_emulated_instruction(&svm->vcpu);
2617 nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
2618 nested_svm_unmap(page);
2623 static int vmsave_interception(struct vcpu_svm *svm)
2625 struct vmcb *nested_vmcb;
2628 if (nested_svm_check_permissions(svm))
2631 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
2635 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2636 skip_emulated_instruction(&svm->vcpu);
2638 nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
2639 nested_svm_unmap(page);
2644 static int vmrun_interception(struct vcpu_svm *svm)
2646 if (nested_svm_check_permissions(svm))
2649 /* Save rip after vmrun instruction */
2650 kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3);
2652 if (!nested_svm_vmrun(svm))
2655 if (!nested_svm_vmrun_msrpm(svm))
2662 svm->vmcb->control.exit_code = SVM_EXIT_ERR;
2663 svm->vmcb->control.exit_code_hi = 0;
2664 svm->vmcb->control.exit_info_1 = 0;
2665 svm->vmcb->control.exit_info_2 = 0;
2667 nested_svm_vmexit(svm);
2672 static int stgi_interception(struct vcpu_svm *svm)
2674 if (nested_svm_check_permissions(svm))
2677 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2678 skip_emulated_instruction(&svm->vcpu);
2679 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
2686 static int clgi_interception(struct vcpu_svm *svm)
2688 if (nested_svm_check_permissions(svm))
2691 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2692 skip_emulated_instruction(&svm->vcpu);
2696 /* After a CLGI no interrupts should come */
2697 svm_clear_vintr(svm);
2698 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
2700 mark_dirty(svm->vmcb, VMCB_INTR);
2705 static int invlpga_interception(struct vcpu_svm *svm)
2707 struct kvm_vcpu *vcpu = &svm->vcpu;
2709 trace_kvm_invlpga(svm->vmcb->save.rip, vcpu->arch.regs[VCPU_REGS_RCX],
2710 vcpu->arch.regs[VCPU_REGS_RAX]);
2712 /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
2713 kvm_mmu_invlpg(vcpu, vcpu->arch.regs[VCPU_REGS_RAX]);
2715 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2716 skip_emulated_instruction(&svm->vcpu);
2720 static int skinit_interception(struct vcpu_svm *svm)
2722 trace_kvm_skinit(svm->vmcb->save.rip, svm->vcpu.arch.regs[VCPU_REGS_RAX]);
2724 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2728 static int xsetbv_interception(struct vcpu_svm *svm)
2730 u64 new_bv = kvm_read_edx_eax(&svm->vcpu);
2731 u32 index = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
2733 if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) {
2734 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2735 skip_emulated_instruction(&svm->vcpu);
2741 static int invalid_op_interception(struct vcpu_svm *svm)
2743 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2747 static int task_switch_interception(struct vcpu_svm *svm)
2751 int int_type = svm->vmcb->control.exit_int_info &
2752 SVM_EXITINTINFO_TYPE_MASK;
2753 int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
2755 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK;
2757 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID;
2758 bool has_error_code = false;
2761 tss_selector = (u16)svm->vmcb->control.exit_info_1;
2763 if (svm->vmcb->control.exit_info_2 &
2764 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
2765 reason = TASK_SWITCH_IRET;
2766 else if (svm->vmcb->control.exit_info_2 &
2767 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
2768 reason = TASK_SWITCH_JMP;
2770 reason = TASK_SWITCH_GATE;
2772 reason = TASK_SWITCH_CALL;
2774 if (reason == TASK_SWITCH_GATE) {
2776 case SVM_EXITINTINFO_TYPE_NMI:
2777 svm->vcpu.arch.nmi_injected = false;
2779 case SVM_EXITINTINFO_TYPE_EXEPT:
2780 if (svm->vmcb->control.exit_info_2 &
2781 (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE)) {
2782 has_error_code = true;
2784 (u32)svm->vmcb->control.exit_info_2;
2786 kvm_clear_exception_queue(&svm->vcpu);
2788 case SVM_EXITINTINFO_TYPE_INTR:
2789 kvm_clear_interrupt_queue(&svm->vcpu);
2796 if (reason != TASK_SWITCH_GATE ||
2797 int_type == SVM_EXITINTINFO_TYPE_SOFT ||
2798 (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
2799 (int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
2800 skip_emulated_instruction(&svm->vcpu);
2802 if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
2805 if (kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
2806 has_error_code, error_code) == EMULATE_FAIL) {
2807 svm->vcpu.run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
2808 svm->vcpu.run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
2809 svm->vcpu.run->internal.ndata = 0;
2815 static int cpuid_interception(struct vcpu_svm *svm)
2817 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
2818 kvm_emulate_cpuid(&svm->vcpu);
2822 static int iret_interception(struct vcpu_svm *svm)
2824 ++svm->vcpu.stat.nmi_window_exits;
2825 clr_intercept(svm, INTERCEPT_IRET);
2826 svm->vcpu.arch.hflags |= HF_IRET_MASK;
2827 svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
2831 static int invlpg_interception(struct vcpu_svm *svm)
2833 if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
2834 return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
2836 kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
2837 skip_emulated_instruction(&svm->vcpu);
2841 static int emulate_on_interception(struct vcpu_svm *svm)
2843 return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
2846 static int rdpmc_interception(struct vcpu_svm *svm)
2850 if (!static_cpu_has(X86_FEATURE_NRIPS))
2851 return emulate_on_interception(svm);
2853 err = kvm_rdpmc(&svm->vcpu);
2854 kvm_complete_insn_gp(&svm->vcpu, err);
2859 bool check_selective_cr0_intercepted(struct vcpu_svm *svm, unsigned long val)
2861 unsigned long cr0 = svm->vcpu.arch.cr0;
2865 intercept = svm->nested.intercept;
2867 if (!is_guest_mode(&svm->vcpu) ||
2868 (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0))))
2871 cr0 &= ~SVM_CR0_SELECTIVE_MASK;
2872 val &= ~SVM_CR0_SELECTIVE_MASK;
2875 svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE;
2876 ret = (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE);
2882 #define CR_VALID (1ULL << 63)
2884 static int cr_interception(struct vcpu_svm *svm)
2890 if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
2891 return emulate_on_interception(svm);
2893 if (unlikely((svm->vmcb->control.exit_info_1 & CR_VALID) == 0))
2894 return emulate_on_interception(svm);
2896 reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
2897 cr = svm->vmcb->control.exit_code - SVM_EXIT_READ_CR0;
2900 if (cr >= 16) { /* mov to cr */
2902 val = kvm_register_read(&svm->vcpu, reg);
2905 if (!check_selective_cr0_intercepted(svm, val))
2906 err = kvm_set_cr0(&svm->vcpu, val);
2912 err = kvm_set_cr3(&svm->vcpu, val);
2915 err = kvm_set_cr4(&svm->vcpu, val);
2918 err = kvm_set_cr8(&svm->vcpu, val);
2921 WARN(1, "unhandled write to CR%d", cr);
2922 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2925 } else { /* mov from cr */
2928 val = kvm_read_cr0(&svm->vcpu);
2931 val = svm->vcpu.arch.cr2;
2934 val = kvm_read_cr3(&svm->vcpu);
2937 val = kvm_read_cr4(&svm->vcpu);
2940 val = kvm_get_cr8(&svm->vcpu);
2943 WARN(1, "unhandled read from CR%d", cr);
2944 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2947 kvm_register_write(&svm->vcpu, reg, val);
2949 kvm_complete_insn_gp(&svm->vcpu, err);
2954 static int dr_interception(struct vcpu_svm *svm)
2960 if (!boot_cpu_has(X86_FEATURE_DECODEASSISTS))
2961 return emulate_on_interception(svm);
2963 reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
2964 dr = svm->vmcb->control.exit_code - SVM_EXIT_READ_DR0;
2966 if (dr >= 16) { /* mov to DRn */
2967 val = kvm_register_read(&svm->vcpu, reg);
2968 kvm_set_dr(&svm->vcpu, dr - 16, val);
2970 err = kvm_get_dr(&svm->vcpu, dr, &val);
2972 kvm_register_write(&svm->vcpu, reg, val);
2975 skip_emulated_instruction(&svm->vcpu);
2980 static int cr8_write_interception(struct vcpu_svm *svm)
2982 struct kvm_run *kvm_run = svm->vcpu.run;
2985 u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
2986 /* instruction emulation calls kvm_set_cr8() */
2987 r = cr_interception(svm);
2988 if (irqchip_in_kernel(svm->vcpu.kvm)) {
2989 clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
2992 if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
2994 kvm_run->exit_reason = KVM_EXIT_SET_TPR;
2998 u64 svm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc)
3000 struct vmcb *vmcb = get_host_vmcb(to_svm(vcpu));
3001 return vmcb->control.tsc_offset +
3002 svm_scale_tsc(vcpu, host_tsc);
3005 static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
3007 struct vcpu_svm *svm = to_svm(vcpu);
3010 case MSR_IA32_TSC: {
3011 *data = svm->vmcb->control.tsc_offset +
3012 svm_scale_tsc(vcpu, native_read_tsc());
3017 *data = svm->vmcb->save.star;
3019 #ifdef CONFIG_X86_64
3021 *data = svm->vmcb->save.lstar;
3024 *data = svm->vmcb->save.cstar;
3026 case MSR_KERNEL_GS_BASE:
3027 *data = svm->vmcb->save.kernel_gs_base;
3029 case MSR_SYSCALL_MASK:
3030 *data = svm->vmcb->save.sfmask;
3033 case MSR_IA32_SYSENTER_CS:
3034 *data = svm->vmcb->save.sysenter_cs;
3036 case MSR_IA32_SYSENTER_EIP:
3037 *data = svm->sysenter_eip;
3039 case MSR_IA32_SYSENTER_ESP:
3040 *data = svm->sysenter_esp;
3043 * Nobody will change the following 5 values in the VMCB so we can
3044 * safely return them on rdmsr. They will always be 0 until LBRV is
3047 case MSR_IA32_DEBUGCTLMSR:
3048 *data = svm->vmcb->save.dbgctl;
3050 case MSR_IA32_LASTBRANCHFROMIP:
3051 *data = svm->vmcb->save.br_from;
3053 case MSR_IA32_LASTBRANCHTOIP:
3054 *data = svm->vmcb->save.br_to;
3056 case MSR_IA32_LASTINTFROMIP:
3057 *data = svm->vmcb->save.last_excp_from;
3059 case MSR_IA32_LASTINTTOIP:
3060 *data = svm->vmcb->save.last_excp_to;
3062 case MSR_VM_HSAVE_PA:
3063 *data = svm->nested.hsave_msr;
3066 *data = svm->nested.vm_cr_msr;
3068 case MSR_IA32_UCODE_REV:
3072 return kvm_get_msr_common(vcpu, ecx, data);
3077 static int rdmsr_interception(struct vcpu_svm *svm)
3079 u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX];
3082 if (svm_get_msr(&svm->vcpu, ecx, &data)) {
3083 trace_kvm_msr_read_ex(ecx);
3084 kvm_inject_gp(&svm->vcpu, 0);
3086 trace_kvm_msr_read(ecx, data);
3088 svm->vcpu.arch.regs[VCPU_REGS_RAX] = data & 0xffffffff;
3089 svm->vcpu.arch.regs[VCPU_REGS_RDX] = data >> 32;
3090 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
3091 skip_emulated_instruction(&svm->vcpu);
3096 static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data)
3098 struct vcpu_svm *svm = to_svm(vcpu);
3099 int svm_dis, chg_mask;
3101 if (data & ~SVM_VM_CR_VALID_MASK)
3104 chg_mask = SVM_VM_CR_VALID_MASK;
3106 if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK)
3107 chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK);
3109 svm->nested.vm_cr_msr &= ~chg_mask;
3110 svm->nested.vm_cr_msr |= (data & chg_mask);
3112 svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK;
3114 /* check for svm_disable while efer.svme is set */
3115 if (svm_dis && (vcpu->arch.efer & EFER_SVME))
3121 static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
3123 struct vcpu_svm *svm = to_svm(vcpu);
3125 u32 ecx = msr->index;
3126 u64 data = msr->data;
3129 kvm_write_tsc(vcpu, msr);
3132 svm->vmcb->save.star = data;
3134 #ifdef CONFIG_X86_64
3136 svm->vmcb->save.lstar = data;
3139 svm->vmcb->save.cstar = data;
3141 case MSR_KERNEL_GS_BASE:
3142 svm->vmcb->save.kernel_gs_base = data;
3144 case MSR_SYSCALL_MASK:
3145 svm->vmcb->save.sfmask = data;
3148 case MSR_IA32_SYSENTER_CS:
3149 svm->vmcb->save.sysenter_cs = data;
3151 case MSR_IA32_SYSENTER_EIP:
3152 svm->sysenter_eip = data;
3153 svm->vmcb->save.sysenter_eip = data;
3155 case MSR_IA32_SYSENTER_ESP:
3156 svm->sysenter_esp = data;
3157 svm->vmcb->save.sysenter_esp = data;
3159 case MSR_IA32_DEBUGCTLMSR:
3160 if (!boot_cpu_has(X86_FEATURE_LBRV)) {
3161 vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
3165 if (data & DEBUGCTL_RESERVED_BITS)
3168 svm->vmcb->save.dbgctl = data;
3169 mark_dirty(svm->vmcb, VMCB_LBR);
3170 if (data & (1ULL<<0))
3171 svm_enable_lbrv(svm);
3173 svm_disable_lbrv(svm);
3175 case MSR_VM_HSAVE_PA:
3176 svm->nested.hsave_msr = data;
3179 return svm_set_vm_cr(vcpu, data);
3181 vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
3184 return kvm_set_msr_common(vcpu, msr);
3189 static int wrmsr_interception(struct vcpu_svm *svm)
3191 struct msr_data msr;
3192 u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX];
3193 u64 data = (svm->vcpu.arch.regs[VCPU_REGS_RAX] & -1u)
3194 | ((u64)(svm->vcpu.arch.regs[VCPU_REGS_RDX] & -1u) << 32);
3198 msr.host_initiated = false;
3200 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
3201 if (svm_set_msr(&svm->vcpu, &msr)) {
3202 trace_kvm_msr_write_ex(ecx, data);
3203 kvm_inject_gp(&svm->vcpu, 0);
3205 trace_kvm_msr_write(ecx, data);
3206 skip_emulated_instruction(&svm->vcpu);
3211 static int msr_interception(struct vcpu_svm *svm)
3213 if (svm->vmcb->control.exit_info_1)
3214 return wrmsr_interception(svm);
3216 return rdmsr_interception(svm);
3219 static int interrupt_window_interception(struct vcpu_svm *svm)
3221 struct kvm_run *kvm_run = svm->vcpu.run;
3223 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3224 svm_clear_vintr(svm);
3225 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
3226 mark_dirty(svm->vmcb, VMCB_INTR);
3227 ++svm->vcpu.stat.irq_window_exits;
3229 * If the user space waits to inject interrupts, exit as soon as
3232 if (!irqchip_in_kernel(svm->vcpu.kvm) &&
3233 kvm_run->request_interrupt_window &&
3234 !kvm_cpu_has_interrupt(&svm->vcpu)) {
3235 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
3242 static int pause_interception(struct vcpu_svm *svm)
3244 kvm_vcpu_on_spin(&(svm->vcpu));
3248 static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
3249 [SVM_EXIT_READ_CR0] = cr_interception,
3250 [SVM_EXIT_READ_CR3] = cr_interception,
3251 [SVM_EXIT_READ_CR4] = cr_interception,
3252 [SVM_EXIT_READ_CR8] = cr_interception,
3253 [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception,
3254 [SVM_EXIT_WRITE_CR0] = cr_interception,
3255 [SVM_EXIT_WRITE_CR3] = cr_interception,
3256 [SVM_EXIT_WRITE_CR4] = cr_interception,
3257 [SVM_EXIT_WRITE_CR8] = cr8_write_interception,
3258 [SVM_EXIT_READ_DR0] = dr_interception,
3259 [SVM_EXIT_READ_DR1] = dr_interception,
3260 [SVM_EXIT_READ_DR2] = dr_interception,
3261 [SVM_EXIT_READ_DR3] = dr_interception,
3262 [SVM_EXIT_READ_DR4] = dr_interception,
3263 [SVM_EXIT_READ_DR5] = dr_interception,
3264 [SVM_EXIT_READ_DR6] = dr_interception,
3265 [SVM_EXIT_READ_DR7] = dr_interception,
3266 [SVM_EXIT_WRITE_DR0] = dr_interception,
3267 [SVM_EXIT_WRITE_DR1] = dr_interception,
3268 [SVM_EXIT_WRITE_DR2] = dr_interception,
3269 [SVM_EXIT_WRITE_DR3] = dr_interception,
3270 [SVM_EXIT_WRITE_DR4] = dr_interception,
3271 [SVM_EXIT_WRITE_DR5] = dr_interception,
3272 [SVM_EXIT_WRITE_DR6] = dr_interception,
3273 [SVM_EXIT_WRITE_DR7] = dr_interception,
3274 [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception,
3275 [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception,
3276 [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception,
3277 [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception,
3278 [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception,
3279 [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception,
3280 [SVM_EXIT_INTR] = intr_interception,
3281 [SVM_EXIT_NMI] = nmi_interception,
3282 [SVM_EXIT_SMI] = nop_on_interception,
3283 [SVM_EXIT_INIT] = nop_on_interception,
3284 [SVM_EXIT_VINTR] = interrupt_window_interception,
3285 [SVM_EXIT_RDPMC] = rdpmc_interception,
3286 [SVM_EXIT_CPUID] = cpuid_interception,
3287 [SVM_EXIT_IRET] = iret_interception,
3288 [SVM_EXIT_INVD] = emulate_on_interception,
3289 [SVM_EXIT_PAUSE] = pause_interception,
3290 [SVM_EXIT_HLT] = halt_interception,
3291 [SVM_EXIT_INVLPG] = invlpg_interception,
3292 [SVM_EXIT_INVLPGA] = invlpga_interception,
3293 [SVM_EXIT_IOIO] = io_interception,
3294 [SVM_EXIT_MSR] = msr_interception,
3295 [SVM_EXIT_TASK_SWITCH] = task_switch_interception,
3296 [SVM_EXIT_SHUTDOWN] = shutdown_interception,
3297 [SVM_EXIT_VMRUN] = vmrun_interception,
3298 [SVM_EXIT_VMMCALL] = vmmcall_interception,
3299 [SVM_EXIT_VMLOAD] = vmload_interception,
3300 [SVM_EXIT_VMSAVE] = vmsave_interception,
3301 [SVM_EXIT_STGI] = stgi_interception,
3302 [SVM_EXIT_CLGI] = clgi_interception,
3303 [SVM_EXIT_SKINIT] = skinit_interception,
3304 [SVM_EXIT_WBINVD] = emulate_on_interception,
3305 [SVM_EXIT_MONITOR] = invalid_op_interception,
3306 [SVM_EXIT_MWAIT] = invalid_op_interception,
3307 [SVM_EXIT_XSETBV] = xsetbv_interception,
3308 [SVM_EXIT_NPF] = pf_interception,
3311 static void dump_vmcb(struct kvm_vcpu *vcpu)
3313 struct vcpu_svm *svm = to_svm(vcpu);
3314 struct vmcb_control_area *control = &svm->vmcb->control;
3315 struct vmcb_save_area *save = &svm->vmcb->save;
3317 pr_err("VMCB Control Area:\n");
3318 pr_err("%-20s%04x\n", "cr_read:", control->intercept_cr & 0xffff);
3319 pr_err("%-20s%04x\n", "cr_write:", control->intercept_cr >> 16);
3320 pr_err("%-20s%04x\n", "dr_read:", control->intercept_dr & 0xffff);
3321 pr_err("%-20s%04x\n", "dr_write:", control->intercept_dr >> 16);
3322 pr_err("%-20s%08x\n", "exceptions:", control->intercept_exceptions);
3323 pr_err("%-20s%016llx\n", "intercepts:", control->intercept);
3324 pr_err("%-20s%d\n", "pause filter count:", control->pause_filter_count);
3325 pr_err("%-20s%016llx\n", "iopm_base_pa:", control->iopm_base_pa);
3326 pr_err("%-20s%016llx\n", "msrpm_base_pa:", control->msrpm_base_pa);
3327 pr_err("%-20s%016llx\n", "tsc_offset:", control->tsc_offset);
3328 pr_err("%-20s%d\n", "asid:", control->asid);
3329 pr_err("%-20s%d\n", "tlb_ctl:", control->tlb_ctl);
3330 pr_err("%-20s%08x\n", "int_ctl:", control->int_ctl);
3331 pr_err("%-20s%08x\n", "int_vector:", control->int_vector);
3332 pr_err("%-20s%08x\n", "int_state:", control->int_state);
3333 pr_err("%-20s%08x\n", "exit_code:", control->exit_code);
3334 pr_err("%-20s%016llx\n", "exit_info1:", control->exit_info_1);
3335 pr_err("%-20s%016llx\n", "exit_info2:", control->exit_info_2);
3336 pr_err("%-20s%08x\n", "exit_int_info:", control->exit_int_info);
3337 pr_err("%-20s%08x\n", "exit_int_info_err:", control->exit_int_info_err);
3338 pr_err("%-20s%lld\n", "nested_ctl:", control->nested_ctl);
3339 pr_err("%-20s%016llx\n", "nested_cr3:", control->nested_cr3);
3340 pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
3341 pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
3342 pr_err("%-20s%lld\n", "lbr_ctl:", control->lbr_ctl);
3343 pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
3344 pr_err("VMCB State Save Area:\n");
3345 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3347 save->es.selector, save->es.attrib,
3348 save->es.limit, save->es.base);
3349 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3351 save->cs.selector, save->cs.attrib,
3352 save->cs.limit, save->cs.base);
3353 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3355 save->ss.selector, save->ss.attrib,
3356 save->ss.limit, save->ss.base);
3357 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3359 save->ds.selector, save->ds.attrib,
3360 save->ds.limit, save->ds.base);
3361 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3363 save->fs.selector, save->fs.attrib,
3364 save->fs.limit, save->fs.base);
3365 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3367 save->gs.selector, save->gs.attrib,
3368 save->gs.limit, save->gs.base);
3369 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3371 save->gdtr.selector, save->gdtr.attrib,
3372 save->gdtr.limit, save->gdtr.base);
3373 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3375 save->ldtr.selector, save->ldtr.attrib,
3376 save->ldtr.limit, save->ldtr.base);
3377 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3379 save->idtr.selector, save->idtr.attrib,
3380 save->idtr.limit, save->idtr.base);
3381 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3383 save->tr.selector, save->tr.attrib,
3384 save->tr.limit, save->tr.base);
3385 pr_err("cpl: %d efer: %016llx\n",
3386 save->cpl, save->efer);
3387 pr_err("%-15s %016llx %-13s %016llx\n",
3388 "cr0:", save->cr0, "cr2:", save->cr2);
3389 pr_err("%-15s %016llx %-13s %016llx\n",
3390 "cr3:", save->cr3, "cr4:", save->cr4);
3391 pr_err("%-15s %016llx %-13s %016llx\n",
3392 "dr6:", save->dr6, "dr7:", save->dr7);
3393 pr_err("%-15s %016llx %-13s %016llx\n",
3394 "rip:", save->rip, "rflags:", save->rflags);
3395 pr_err("%-15s %016llx %-13s %016llx\n",
3396 "rsp:", save->rsp, "rax:", save->rax);
3397 pr_err("%-15s %016llx %-13s %016llx\n",
3398 "star:", save->star, "lstar:", save->lstar);
3399 pr_err("%-15s %016llx %-13s %016llx\n",
3400 "cstar:", save->cstar, "sfmask:", save->sfmask);
3401 pr_err("%-15s %016llx %-13s %016llx\n",
3402 "kernel_gs_base:", save->kernel_gs_base,
3403 "sysenter_cs:", save->sysenter_cs);
3404 pr_err("%-15s %016llx %-13s %016llx\n",
3405 "sysenter_esp:", save->sysenter_esp,
3406 "sysenter_eip:", save->sysenter_eip);
3407 pr_err("%-15s %016llx %-13s %016llx\n",
3408 "gpat:", save->g_pat, "dbgctl:", save->dbgctl);
3409 pr_err("%-15s %016llx %-13s %016llx\n",
3410 "br_from:", save->br_from, "br_to:", save->br_to);
3411 pr_err("%-15s %016llx %-13s %016llx\n",
3412 "excp_from:", save->last_excp_from,
3413 "excp_to:", save->last_excp_to);
3416 static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
3418 struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control;
3420 *info1 = control->exit_info_1;
3421 *info2 = control->exit_info_2;
3424 static int handle_exit(struct kvm_vcpu *vcpu)
3426 struct vcpu_svm *svm = to_svm(vcpu);
3427 struct kvm_run *kvm_run = vcpu->run;
3428 u32 exit_code = svm->vmcb->control.exit_code;
3430 if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
3431 vcpu->arch.cr0 = svm->vmcb->save.cr0;
3433 vcpu->arch.cr3 = svm->vmcb->save.cr3;
3435 if (unlikely(svm->nested.exit_required)) {
3436 nested_svm_vmexit(svm);
3437 svm->nested.exit_required = false;
3442 if (is_guest_mode(vcpu)) {
3445 trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code,
3446 svm->vmcb->control.exit_info_1,
3447 svm->vmcb->control.exit_info_2,
3448 svm->vmcb->control.exit_int_info,
3449 svm->vmcb->control.exit_int_info_err,
3452 vmexit = nested_svm_exit_special(svm);
3454 if (vmexit == NESTED_EXIT_CONTINUE)
3455 vmexit = nested_svm_exit_handled(svm);
3457 if (vmexit == NESTED_EXIT_DONE)
3461 svm_complete_interrupts(svm);
3463 if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
3464 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
3465 kvm_run->fail_entry.hardware_entry_failure_reason
3466 = svm->vmcb->control.exit_code;
3467 pr_err("KVM: FAILED VMRUN WITH VMCB:\n");
3472 if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
3473 exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
3474 exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
3475 exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
3476 printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
3478 __func__, svm->vmcb->control.exit_int_info,
3481 if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
3482 || !svm_exit_handlers[exit_code]) {
3483 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
3484 kvm_run->hw.hardware_exit_reason = exit_code;
3488 return svm_exit_handlers[exit_code](svm);
3491 static void reload_tss(struct kvm_vcpu *vcpu)
3493 int cpu = raw_smp_processor_id();
3495 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
3496 sd->tss_desc->type = 9; /* available 32/64-bit TSS */
3500 static void pre_svm_run(struct vcpu_svm *svm)
3502 int cpu = raw_smp_processor_id();
3504 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
3506 /* FIXME: handle wraparound of asid_generation */
3507 if (svm->asid_generation != sd->asid_generation)
3511 static void svm_inject_nmi(struct kvm_vcpu *vcpu)
3513 struct vcpu_svm *svm = to_svm(vcpu);
3515 svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI;
3516 vcpu->arch.hflags |= HF_NMI_MASK;
3517 set_intercept(svm, INTERCEPT_IRET);
3518 ++vcpu->stat.nmi_injections;
3521 static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
3523 struct vmcb_control_area *control;
3525 control = &svm->vmcb->control;
3526 control->int_vector = irq;
3527 control->int_ctl &= ~V_INTR_PRIO_MASK;
3528 control->int_ctl |= V_IRQ_MASK |
3529 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
3530 mark_dirty(svm->vmcb, VMCB_INTR);
3533 static void svm_set_irq(struct kvm_vcpu *vcpu)
3535 struct vcpu_svm *svm = to_svm(vcpu);
3537 BUG_ON(!(gif_set(svm)));
3539 trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
3540 ++vcpu->stat.irq_injections;
3542 svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
3543 SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
3546 static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
3548 struct vcpu_svm *svm = to_svm(vcpu);
3550 if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
3557 set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
3560 static void svm_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set)
3565 static int svm_vm_has_apicv(struct kvm *kvm)
3570 static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
3575 static void svm_hwapic_isr_update(struct kvm *kvm, int isr)
3580 static void svm_sync_pir_to_irr(struct kvm_vcpu *vcpu)
3585 static int svm_nmi_allowed(struct kvm_vcpu *vcpu)
3587 struct vcpu_svm *svm = to_svm(vcpu);
3588 struct vmcb *vmcb = svm->vmcb;
3590 ret = !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
3591 !(svm->vcpu.arch.hflags & HF_NMI_MASK);
3592 ret = ret && gif_set(svm) && nested_svm_nmi(svm);
3597 static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu)
3599 struct vcpu_svm *svm = to_svm(vcpu);
3601 return !!(svm->vcpu.arch.hflags & HF_NMI_MASK);
3604 static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
3606 struct vcpu_svm *svm = to_svm(vcpu);
3609 svm->vcpu.arch.hflags |= HF_NMI_MASK;
3610 set_intercept(svm, INTERCEPT_IRET);
3612 svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
3613 clr_intercept(svm, INTERCEPT_IRET);
3617 static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
3619 struct vcpu_svm *svm = to_svm(vcpu);
3620 struct vmcb *vmcb = svm->vmcb;
3623 if (!gif_set(svm) ||
3624 (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK))
3627 ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
3629 if (is_guest_mode(vcpu))
3630 return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);
3635 static int enable_irq_window(struct kvm_vcpu *vcpu)
3637 struct vcpu_svm *svm = to_svm(vcpu);
3640 * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes
3641 * 1, because that's a separate STGI/VMRUN intercept. The next time we
3642 * get that intercept, this function will be called again though and
3643 * we'll get the vintr intercept.
3645 if (gif_set(svm) && nested_svm_intr(svm)) {
3647 svm_inject_irq(svm, 0x0);
3652 static int enable_nmi_window(struct kvm_vcpu *vcpu)
3654 struct vcpu_svm *svm = to_svm(vcpu);
3656 if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
3658 return 0; /* IRET will cause a vm exit */
3661 * Something prevents NMI from been injected. Single step over possible
3662 * problem (IRET or exception injection or interrupt shadow)
3664 svm->nmi_singlestep = true;
3665 svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
3666 update_db_bp_intercept(vcpu);
3670 static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
3675 static void svm_flush_tlb(struct kvm_vcpu *vcpu)
3677 struct vcpu_svm *svm = to_svm(vcpu);
3679 if (static_cpu_has(X86_FEATURE_FLUSHBYASID))
3680 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
3682 svm->asid_generation--;
3685 static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
3689 static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
3691 struct vcpu_svm *svm = to_svm(vcpu);
3693 if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
3696 if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
3697 int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
3698 kvm_set_cr8(vcpu, cr8);
3702 static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
3704 struct vcpu_svm *svm = to_svm(vcpu);
3707 if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
3710 cr8 = kvm_get_cr8(vcpu);
3711 svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
3712 svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
3715 static void svm_complete_interrupts(struct vcpu_svm *svm)
3719 u32 exitintinfo = svm->vmcb->control.exit_int_info;
3720 unsigned int3_injected = svm->int3_injected;
3722 svm->int3_injected = 0;
3725 * If we've made progress since setting HF_IRET_MASK, we've
3726 * executed an IRET and can allow NMI injection.
3728 if ((svm->vcpu.arch.hflags & HF_IRET_MASK)
3729 && kvm_rip_read(&svm->vcpu) != svm->nmi_iret_rip) {
3730 svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
3731 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3734 svm->vcpu.arch.nmi_injected = false;
3735 kvm_clear_exception_queue(&svm->vcpu);
3736 kvm_clear_interrupt_queue(&svm->vcpu);
3738 if (!(exitintinfo & SVM_EXITINTINFO_VALID))
3741 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3743 vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK;
3744 type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK;
3747 case SVM_EXITINTINFO_TYPE_NMI:
3748 svm->vcpu.arch.nmi_injected = true;
3750 case SVM_EXITINTINFO_TYPE_EXEPT:
3752 * In case of software exceptions, do not reinject the vector,
3753 * but re-execute the instruction instead. Rewind RIP first
3754 * if we emulated INT3 before.
3756 if (kvm_exception_is_soft(vector)) {
3757 if (vector == BP_VECTOR && int3_injected &&
3758 kvm_is_linear_rip(&svm->vcpu, svm->int3_rip))
3759 kvm_rip_write(&svm->vcpu,
3760 kvm_rip_read(&svm->vcpu) -
3764 if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
3765 u32 err = svm->vmcb->control.exit_int_info_err;
3766 kvm_requeue_exception_e(&svm->vcpu, vector, err);
3769 kvm_requeue_exception(&svm->vcpu, vector);
3771 case SVM_EXITINTINFO_TYPE_INTR:
3772 kvm_queue_interrupt(&svm->vcpu, vector, false);
3779 static void svm_cancel_injection(struct kvm_vcpu *vcpu)
3781 struct vcpu_svm *svm = to_svm(vcpu);
3782 struct vmcb_control_area *control = &svm->vmcb->control;
3784 control->exit_int_info = control->event_inj;
3785 control->exit_int_info_err = control->event_inj_err;
3786 control->event_inj = 0;
3787 svm_complete_interrupts(svm);
3790 static void svm_vcpu_run(struct kvm_vcpu *vcpu)
3792 struct vcpu_svm *svm = to_svm(vcpu);
3794 svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
3795 svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
3796 svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];
3799 * A vmexit emulation is required before the vcpu can be executed
3802 if (unlikely(svm->nested.exit_required))
3807 sync_lapic_to_cr8(vcpu);
3809 svm->vmcb->save.cr2 = vcpu->arch.cr2;
3816 "push %%" _ASM_BP "; \n\t"
3817 "mov %c[rbx](%[svm]), %%" _ASM_BX " \n\t"
3818 "mov %c[rcx](%[svm]), %%" _ASM_CX " \n\t"
3819 "mov %c[rdx](%[svm]), %%" _ASM_DX " \n\t"
3820 "mov %c[rsi](%[svm]), %%" _ASM_SI " \n\t"
3821 "mov %c[rdi](%[svm]), %%" _ASM_DI " \n\t"
3822 "mov %c[rbp](%[svm]), %%" _ASM_BP " \n\t"
3823 #ifdef CONFIG_X86_64
3824 "mov %c[r8](%[svm]), %%r8 \n\t"
3825 "mov %c[r9](%[svm]), %%r9 \n\t"
3826 "mov %c[r10](%[svm]), %%r10 \n\t"
3827 "mov %c[r11](%[svm]), %%r11 \n\t"
3828 "mov %c[r12](%[svm]), %%r12 \n\t"
3829 "mov %c[r13](%[svm]), %%r13 \n\t"
3830 "mov %c[r14](%[svm]), %%r14 \n\t"
3831 "mov %c[r15](%[svm]), %%r15 \n\t"
3834 /* Enter guest mode */
3835 "push %%" _ASM_AX " \n\t"
3836 "mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
3837 __ex(SVM_VMLOAD) "\n\t"
3838 __ex(SVM_VMRUN) "\n\t"
3839 __ex(SVM_VMSAVE) "\n\t"
3840 "pop %%" _ASM_AX " \n\t"
3842 /* Save guest registers, load host registers */
3843 "mov %%" _ASM_BX ", %c[rbx](%[svm]) \n\t"
3844 "mov %%" _ASM_CX ", %c[rcx](%[svm]) \n\t"
3845 "mov %%" _ASM_DX ", %c[rdx](%[svm]) \n\t"
3846 "mov %%" _ASM_SI ", %c[rsi](%[svm]) \n\t"
3847 "mov %%" _ASM_DI ", %c[rdi](%[svm]) \n\t"
3848 "mov %%" _ASM_BP ", %c[rbp](%[svm]) \n\t"
3849 #ifdef CONFIG_X86_64
3850 "mov %%r8, %c[r8](%[svm]) \n\t"
3851 "mov %%r9, %c[r9](%[svm]) \n\t"
3852 "mov %%r10, %c[r10](%[svm]) \n\t"
3853 "mov %%r11, %c[r11](%[svm]) \n\t"
3854 "mov %%r12, %c[r12](%[svm]) \n\t"
3855 "mov %%r13, %c[r13](%[svm]) \n\t"
3856 "mov %%r14, %c[r14](%[svm]) \n\t"
3857 "mov %%r15, %c[r15](%[svm]) \n\t"
3862 [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
3863 [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])),
3864 [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])),
3865 [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])),
3866 [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])),
3867 [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])),
3868 [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP]))
3869 #ifdef CONFIG_X86_64
3870 , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])),
3871 [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])),
3872 [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])),
3873 [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])),
3874 [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])),
3875 [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])),
3876 [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])),
3877 [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15]))
3880 #ifdef CONFIG_X86_64
3881 , "rbx", "rcx", "rdx", "rsi", "rdi"
3882 , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
3884 , "ebx", "ecx", "edx", "esi", "edi"
3888 #ifdef CONFIG_X86_64
3889 wrmsrl(MSR_GS_BASE, svm->host.gs_base);
3891 loadsegment(fs, svm->host.fs);
3892 #ifndef CONFIG_X86_32_LAZY_GS
3893 loadsegment(gs, svm->host.gs);
3899 local_irq_disable();
3901 vcpu->arch.cr2 = svm->vmcb->save.cr2;
3902 vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
3903 vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
3904 vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
3906 trace_kvm_exit(svm->vmcb->control.exit_code, vcpu, KVM_ISA_SVM);
3908 if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
3909 kvm_before_handle_nmi(&svm->vcpu);
3913 /* Any pending NMI will happen here */
3915 if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
3916 kvm_after_handle_nmi(&svm->vcpu);
3918 sync_cr8_to_lapic(vcpu);
3922 svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
3924 /* if exit due to PF check for async PF */
3925 if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
3926 svm->apf_reason = kvm_read_and_reset_pf_reason();
3929 vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
3930 vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
3934 * We need to handle MC intercepts here before the vcpu has a chance to
3935 * change the physical cpu
3937 if (unlikely(svm->vmcb->control.exit_code ==
3938 SVM_EXIT_EXCP_BASE + MC_VECTOR))
3939 svm_handle_mce(svm);
3941 mark_all_clean(svm->vmcb);
3944 static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
3946 struct vcpu_svm *svm = to_svm(vcpu);
3948 svm->vmcb->save.cr3 = root;
3949 mark_dirty(svm->vmcb, VMCB_CR);
3950 svm_flush_tlb(vcpu);
3953 static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
3955 struct vcpu_svm *svm = to_svm(vcpu);
3957 svm->vmcb->control.nested_cr3 = root;
3958 mark_dirty(svm->vmcb, VMCB_NPT);
3960 /* Also sync guest cr3 here in case we live migrate */
3961 svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
3962 mark_dirty(svm->vmcb, VMCB_CR);
3964 svm_flush_tlb(vcpu);
3967 static int is_disabled(void)
3971 rdmsrl(MSR_VM_CR, vm_cr);
3972 if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
3979 svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
3982 * Patch in the VMMCALL instruction:
3984 hypercall[0] = 0x0f;
3985 hypercall[1] = 0x01;
3986 hypercall[2] = 0xd9;
3989 static void svm_check_processor_compat(void *rtn)
3994 static bool svm_cpu_has_accelerated_tpr(void)
3999 static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
4004 static void svm_cpuid_update(struct kvm_vcpu *vcpu)
4008 static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
4013 entry->ecx |= (1 << 2); /* Set SVM bit */
4016 entry->eax = 1; /* SVM revision 1 */
4017 entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper
4018 ASID emulation to nested SVM */
4019 entry->ecx = 0; /* Reserved */
4020 entry->edx = 0; /* Per default do not support any
4021 additional features */
4023 /* Support next_rip if host supports it */
4024 if (boot_cpu_has(X86_FEATURE_NRIPS))
4025 entry->edx |= SVM_FEATURE_NRIP;
4027 /* Support NPT for the guest if enabled */
4029 entry->edx |= SVM_FEATURE_NPT;
4035 static int svm_get_lpage_level(void)
4037 return PT_PDPE_LEVEL;
4040 static bool svm_rdtscp_supported(void)
4045 static bool svm_invpcid_supported(void)
4050 static bool svm_has_wbinvd_exit(void)
4055 static void svm_fpu_deactivate(struct kvm_vcpu *vcpu)
4057 struct vcpu_svm *svm = to_svm(vcpu);
4059 set_exception_intercept(svm, NM_VECTOR);
4060 update_cr0_intercept(svm);
4063 #define PRE_EX(exit) { .exit_code = (exit), \
4064 .stage = X86_ICPT_PRE_EXCEPT, }
4065 #define POST_EX(exit) { .exit_code = (exit), \
4066 .stage = X86_ICPT_POST_EXCEPT, }
4067 #define POST_MEM(exit) { .exit_code = (exit), \
4068 .stage = X86_ICPT_POST_MEMACCESS, }
4070 static const struct __x86_intercept {
4072 enum x86_intercept_stage stage;
4073 } x86_intercept_map[] = {
4074 [x86_intercept_cr_read] = POST_EX(SVM_EXIT_READ_CR0),
4075 [x86_intercept_cr_write] = POST_EX(SVM_EXIT_WRITE_CR0),
4076 [x86_intercept_clts] = POST_EX(SVM_EXIT_WRITE_CR0),
4077 [x86_intercept_lmsw] = POST_EX(SVM_EXIT_WRITE_CR0),
4078 [x86_intercept_smsw] = POST_EX(SVM_EXIT_READ_CR0),
4079 [x86_intercept_dr_read] = POST_EX(SVM_EXIT_READ_DR0),
4080 [x86_intercept_dr_write] = POST_EX(SVM_EXIT_WRITE_DR0),
4081 [x86_intercept_sldt] = POST_EX(SVM_EXIT_LDTR_READ),
4082 [x86_intercept_str] = POST_EX(SVM_EXIT_TR_READ),
4083 [x86_intercept_lldt] = POST_EX(SVM_EXIT_LDTR_WRITE),
4084 [x86_intercept_ltr] = POST_EX(SVM_EXIT_TR_WRITE),
4085 [x86_intercept_sgdt] = POST_EX(SVM_EXIT_GDTR_READ),
4086 [x86_intercept_sidt] = POST_EX(SVM_EXIT_IDTR_READ),
4087 [x86_intercept_lgdt] = POST_EX(SVM_EXIT_GDTR_WRITE),
4088 [x86_intercept_lidt] = POST_EX(SVM_EXIT_IDTR_WRITE),
4089 [x86_intercept_vmrun] = POST_EX(SVM_EXIT_VMRUN),
4090 [x86_intercept_vmmcall] = POST_EX(SVM_EXIT_VMMCALL),
4091 [x86_intercept_vmload] = POST_EX(SVM_EXIT_VMLOAD),
4092 [x86_intercept_vmsave] = POST_EX(SVM_EXIT_VMSAVE),
4093 [x86_intercept_stgi] = POST_EX(SVM_EXIT_STGI),
4094 [x86_intercept_clgi] = POST_EX(SVM_EXIT_CLGI),
4095 [x86_intercept_skinit] = POST_EX(SVM_EXIT_SKINIT),
4096 [x86_intercept_invlpga] = POST_EX(SVM_EXIT_INVLPGA),
4097 [x86_intercept_rdtscp] = POST_EX(SVM_EXIT_RDTSCP),
4098 [x86_intercept_monitor] = POST_MEM(SVM_EXIT_MONITOR),
4099 [x86_intercept_mwait] = POST_EX(SVM_EXIT_MWAIT),
4100 [x86_intercept_invlpg] = POST_EX(SVM_EXIT_INVLPG),
4101 [x86_intercept_invd] = POST_EX(SVM_EXIT_INVD),
4102 [x86_intercept_wbinvd] = POST_EX(SVM_EXIT_WBINVD),
4103 [x86_intercept_wrmsr] = POST_EX(SVM_EXIT_MSR),
4104 [x86_intercept_rdtsc] = POST_EX(SVM_EXIT_RDTSC),
4105 [x86_intercept_rdmsr] = POST_EX(SVM_EXIT_MSR),
4106 [x86_intercept_rdpmc] = POST_EX(SVM_EXIT_RDPMC),
4107 [x86_intercept_cpuid] = PRE_EX(SVM_EXIT_CPUID),
4108 [x86_intercept_rsm] = PRE_EX(SVM_EXIT_RSM),
4109 [x86_intercept_pause] = PRE_EX(SVM_EXIT_PAUSE),
4110 [x86_intercept_pushf] = PRE_EX(SVM_EXIT_PUSHF),
4111 [x86_intercept_popf] = PRE_EX(SVM_EXIT_POPF),
4112 [x86_intercept_intn] = PRE_EX(SVM_EXIT_SWINT),
4113 [x86_intercept_iret] = PRE_EX(SVM_EXIT_IRET),
4114 [x86_intercept_icebp] = PRE_EX(SVM_EXIT_ICEBP),
4115 [x86_intercept_hlt] = POST_EX(SVM_EXIT_HLT),
4116 [x86_intercept_in] = POST_EX(SVM_EXIT_IOIO),
4117 [x86_intercept_ins] = POST_EX(SVM_EXIT_IOIO),
4118 [x86_intercept_out] = POST_EX(SVM_EXIT_IOIO),
4119 [x86_intercept_outs] = POST_EX(SVM_EXIT_IOIO),
4126 static int svm_check_intercept(struct kvm_vcpu *vcpu,
4127 struct x86_instruction_info *info,
4128 enum x86_intercept_stage stage)
4130 struct vcpu_svm *svm = to_svm(vcpu);
4131 int vmexit, ret = X86EMUL_CONTINUE;
4132 struct __x86_intercept icpt_info;
4133 struct vmcb *vmcb = svm->vmcb;
4135 if (info->intercept >= ARRAY_SIZE(x86_intercept_map))
4138 icpt_info = x86_intercept_map[info->intercept];
4140 if (stage != icpt_info.stage)
4143 switch (icpt_info.exit_code) {
4144 case SVM_EXIT_READ_CR0:
4145 if (info->intercept == x86_intercept_cr_read)
4146 icpt_info.exit_code += info->modrm_reg;
4148 case SVM_EXIT_WRITE_CR0: {
4149 unsigned long cr0, val;
4152 if (info->intercept == x86_intercept_cr_write)
4153 icpt_info.exit_code += info->modrm_reg;
4155 if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0)
4158 intercept = svm->nested.intercept;
4160 if (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0)))
4163 cr0 = vcpu->arch.cr0 & ~SVM_CR0_SELECTIVE_MASK;
4164 val = info->src_val & ~SVM_CR0_SELECTIVE_MASK;
4166 if (info->intercept == x86_intercept_lmsw) {
4169 /* lmsw can't clear PE - catch this here */
4170 if (cr0 & X86_CR0_PE)
4175 icpt_info.exit_code = SVM_EXIT_CR0_SEL_WRITE;
4179 case SVM_EXIT_READ_DR0:
4180 case SVM_EXIT_WRITE_DR0:
4181 icpt_info.exit_code += info->modrm_reg;
4184 if (info->intercept == x86_intercept_wrmsr)
4185 vmcb->control.exit_info_1 = 1;
4187 vmcb->control.exit_info_1 = 0;
4189 case SVM_EXIT_PAUSE:
4191 * We get this for NOP only, but pause
4192 * is rep not, check this here
4194 if (info->rep_prefix != REPE_PREFIX)
4196 case SVM_EXIT_IOIO: {
4200 exit_info = (vcpu->arch.regs[VCPU_REGS_RDX] & 0xffff) << 16;
4202 if (info->intercept == x86_intercept_in ||
4203 info->intercept == x86_intercept_ins) {
4204 exit_info |= SVM_IOIO_TYPE_MASK;
4205 bytes = info->src_bytes;
4207 bytes = info->dst_bytes;
4210 if (info->intercept == x86_intercept_outs ||
4211 info->intercept == x86_intercept_ins)
4212 exit_info |= SVM_IOIO_STR_MASK;
4214 if (info->rep_prefix)
4215 exit_info |= SVM_IOIO_REP_MASK;
4217 bytes = min(bytes, 4u);
4219 exit_info |= bytes << SVM_IOIO_SIZE_SHIFT;
4221 exit_info |= (u32)info->ad_bytes << (SVM_IOIO_ASIZE_SHIFT - 1);
4223 vmcb->control.exit_info_1 = exit_info;
4224 vmcb->control.exit_info_2 = info->next_rip;
4232 vmcb->control.next_rip = info->next_rip;
4233 vmcb->control.exit_code = icpt_info.exit_code;
4234 vmexit = nested_svm_exit_handled(svm);
4236 ret = (vmexit == NESTED_EXIT_DONE) ? X86EMUL_INTERCEPTED
4243 static void svm_handle_external_intr(struct kvm_vcpu *vcpu)
4248 static struct kvm_x86_ops svm_x86_ops = {
4249 .cpu_has_kvm_support = has_svm,
4250 .disabled_by_bios = is_disabled,
4251 .hardware_setup = svm_hardware_setup,
4252 .hardware_unsetup = svm_hardware_unsetup,
4253 .check_processor_compatibility = svm_check_processor_compat,
4254 .hardware_enable = svm_hardware_enable,
4255 .hardware_disable = svm_hardware_disable,
4256 .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
4258 .vcpu_create = svm_create_vcpu,
4259 .vcpu_free = svm_free_vcpu,
4260 .vcpu_reset = svm_vcpu_reset,
4262 .prepare_guest_switch = svm_prepare_guest_switch,
4263 .vcpu_load = svm_vcpu_load,
4264 .vcpu_put = svm_vcpu_put,
4266 .update_db_bp_intercept = update_db_bp_intercept,
4267 .get_msr = svm_get_msr,
4268 .set_msr = svm_set_msr,
4269 .get_segment_base = svm_get_segment_base,
4270 .get_segment = svm_get_segment,
4271 .set_segment = svm_set_segment,
4272 .get_cpl = svm_get_cpl,
4273 .get_cs_db_l_bits = kvm_get_cs_db_l_bits,
4274 .decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
4275 .decache_cr3 = svm_decache_cr3,
4276 .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
4277 .set_cr0 = svm_set_cr0,
4278 .set_cr3 = svm_set_cr3,
4279 .set_cr4 = svm_set_cr4,
4280 .set_efer = svm_set_efer,
4281 .get_idt = svm_get_idt,
4282 .set_idt = svm_set_idt,
4283 .get_gdt = svm_get_gdt,
4284 .set_gdt = svm_set_gdt,
4285 .set_dr7 = svm_set_dr7,
4286 .cache_reg = svm_cache_reg,
4287 .get_rflags = svm_get_rflags,
4288 .set_rflags = svm_set_rflags,
4289 .fpu_activate = svm_fpu_activate,
4290 .fpu_deactivate = svm_fpu_deactivate,
4292 .tlb_flush = svm_flush_tlb,
4294 .run = svm_vcpu_run,
4295 .handle_exit = handle_exit,
4296 .skip_emulated_instruction = skip_emulated_instruction,
4297 .set_interrupt_shadow = svm_set_interrupt_shadow,
4298 .get_interrupt_shadow = svm_get_interrupt_shadow,
4299 .patch_hypercall = svm_patch_hypercall,
4300 .set_irq = svm_set_irq,
4301 .set_nmi = svm_inject_nmi,
4302 .queue_exception = svm_queue_exception,
4303 .cancel_injection = svm_cancel_injection,
4304 .interrupt_allowed = svm_interrupt_allowed,
4305 .nmi_allowed = svm_nmi_allowed,
4306 .get_nmi_mask = svm_get_nmi_mask,
4307 .set_nmi_mask = svm_set_nmi_mask,
4308 .enable_nmi_window = enable_nmi_window,
4309 .enable_irq_window = enable_irq_window,
4310 .update_cr8_intercept = update_cr8_intercept,
4311 .set_virtual_x2apic_mode = svm_set_virtual_x2apic_mode,
4312 .vm_has_apicv = svm_vm_has_apicv,
4313 .load_eoi_exitmap = svm_load_eoi_exitmap,
4314 .hwapic_isr_update = svm_hwapic_isr_update,
4315 .sync_pir_to_irr = svm_sync_pir_to_irr,
4317 .set_tss_addr = svm_set_tss_addr,
4318 .get_tdp_level = get_npt_level,
4319 .get_mt_mask = svm_get_mt_mask,
4321 .get_exit_info = svm_get_exit_info,
4323 .get_lpage_level = svm_get_lpage_level,
4325 .cpuid_update = svm_cpuid_update,
4327 .rdtscp_supported = svm_rdtscp_supported,
4328 .invpcid_supported = svm_invpcid_supported,
4330 .set_supported_cpuid = svm_set_supported_cpuid,
4332 .has_wbinvd_exit = svm_has_wbinvd_exit,
4334 .set_tsc_khz = svm_set_tsc_khz,
4335 .read_tsc_offset = svm_read_tsc_offset,
4336 .write_tsc_offset = svm_write_tsc_offset,
4337 .adjust_tsc_offset = svm_adjust_tsc_offset,
4338 .compute_tsc_offset = svm_compute_tsc_offset,
4339 .read_l1_tsc = svm_read_l1_tsc,
4341 .set_tdp_cr3 = set_tdp_cr3,
4343 .check_intercept = svm_check_intercept,
4344 .handle_external_intr = svm_handle_external_intr,
4347 static int __init svm_init(void)
4349 return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
4350 __alignof__(struct vcpu_svm), THIS_MODULE);
4353 static void __exit svm_exit(void)
4358 module_init(svm_init)
4359 module_exit(svm_exit)