2 * Kernel-based Virtual Machine driver for Linux
6 * Copyright (C) 2006 Qumranet, Inc.
9 * Yaniv Kamay <yaniv@qumranet.com>
10 * Avi Kivity <avi@qumranet.com>
12 * This work is licensed under the terms of the GNU GPL, version 2. See
13 * the COPYING file in the top-level directory.
16 #include <linux/kvm_host.h>
20 #include "kvm_cache_regs.h"
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/vmalloc.h>
26 #include <linux/highmem.h>
27 #include <linux/sched.h>
28 #include <linux/ftrace_event.h>
29 #include <linux/slab.h>
33 #include <asm/virtext.h>
36 #define __ex(x) __kvm_handle_fault_on_reboot(x)
38 MODULE_AUTHOR("Qumranet");
39 MODULE_LICENSE("GPL");
41 #define IOPM_ALLOC_ORDER 2
42 #define MSRPM_ALLOC_ORDER 1
44 #define SEG_TYPE_LDT 2
45 #define SEG_TYPE_BUSY_TSS16 3
47 #define SVM_FEATURE_NPT (1 << 0)
48 #define SVM_FEATURE_LBRV (1 << 1)
49 #define SVM_FEATURE_SVML (1 << 2)
50 #define SVM_FEATURE_NRIP (1 << 3)
51 #define SVM_FEATURE_PAUSE_FILTER (1 << 10)
53 #define NESTED_EXIT_HOST 0 /* Exit handled on host level */
54 #define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */
55 #define NESTED_EXIT_CONTINUE 2 /* Further checks needed */
57 #define DEBUGCTL_RESERVED_BITS (~(0x3fULL))
59 static const u32 host_save_user_msrs[] = {
61 MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE,
64 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
67 #define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)
77 /* These are the merged vectors */
80 /* gpa pointers to the real vectors */
83 /* A VMEXIT is required but not yet emulated */
86 /* cache for intercepts of the guest */
87 u16 intercept_cr_read;
88 u16 intercept_cr_write;
89 u16 intercept_dr_read;
90 u16 intercept_dr_write;
91 u32 intercept_exceptions;
99 unsigned long vmcb_pa;
100 struct svm_cpu_data *svm_data;
101 uint64_t asid_generation;
102 uint64_t sysenter_esp;
103 uint64_t sysenter_eip;
107 u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS];
112 struct nested_state nested;
116 unsigned int3_injected;
117 unsigned long int3_rip;
120 /* enable NPT for AMD64 and X86 with PAE */
121 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
122 static bool npt_enabled = true;
124 static bool npt_enabled;
128 module_param(npt, int, S_IRUGO);
130 static int nested = 1;
131 module_param(nested, int, S_IRUGO);
133 static void svm_flush_tlb(struct kvm_vcpu *vcpu);
134 static void svm_complete_interrupts(struct vcpu_svm *svm);
136 static int nested_svm_exit_handled(struct vcpu_svm *svm);
137 static int nested_svm_intercept(struct vcpu_svm *svm);
138 static int nested_svm_vmexit(struct vcpu_svm *svm);
139 static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
140 bool has_error_code, u32 error_code);
142 static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
144 return container_of(vcpu, struct vcpu_svm, vcpu);
147 static inline bool is_nested(struct vcpu_svm *svm)
149 return svm->nested.vmcb;
152 static inline void enable_gif(struct vcpu_svm *svm)
154 svm->vcpu.arch.hflags |= HF_GIF_MASK;
157 static inline void disable_gif(struct vcpu_svm *svm)
159 svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
162 static inline bool gif_set(struct vcpu_svm *svm)
164 return !!(svm->vcpu.arch.hflags & HF_GIF_MASK);
167 static unsigned long iopm_base;
169 struct kvm_ldttss_desc {
172 unsigned base1:8, type:5, dpl:2, p:1;
173 unsigned limit1:4, zero0:3, g:1, base2:8;
176 } __attribute__((packed));
178 struct svm_cpu_data {
184 struct kvm_ldttss_desc *tss_desc;
186 struct page *save_area;
189 static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
190 static uint32_t svm_features;
192 struct svm_init_data {
197 static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
199 #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
200 #define MSRS_RANGE_SIZE 2048
201 #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
203 #define MAX_INST_SIZE 15
205 static inline u32 svm_has(u32 feat)
207 return svm_features & feat;
210 static inline void clgi(void)
212 asm volatile (__ex(SVM_CLGI));
215 static inline void stgi(void)
217 asm volatile (__ex(SVM_STGI));
220 static inline void invlpga(unsigned long addr, u32 asid)
222 asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid));
225 static inline void force_new_asid(struct kvm_vcpu *vcpu)
227 to_svm(vcpu)->asid_generation--;
230 static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
232 force_new_asid(vcpu);
235 static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
237 if (!npt_enabled && !(efer & EFER_LMA))
240 to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
241 vcpu->arch.efer = efer;
244 static int is_external_interrupt(u32 info)
246 info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
247 return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
250 static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
252 struct vcpu_svm *svm = to_svm(vcpu);
255 if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
256 ret |= KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS;
260 static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
262 struct vcpu_svm *svm = to_svm(vcpu);
265 svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
267 svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK;
271 static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
273 struct vcpu_svm *svm = to_svm(vcpu);
275 if (!svm->next_rip) {
276 if (emulate_instruction(vcpu, 0, 0, EMULTYPE_SKIP) !=
278 printk(KERN_DEBUG "%s: NOP\n", __func__);
281 if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
282 printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
283 __func__, kvm_rip_read(vcpu), svm->next_rip);
285 kvm_rip_write(vcpu, svm->next_rip);
286 svm_set_interrupt_shadow(vcpu, 0);
289 static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
290 bool has_error_code, u32 error_code)
292 struct vcpu_svm *svm = to_svm(vcpu);
295 * If we are within a nested VM we'd better #VMEXIT and let the guest
296 * handle the exception
298 if (nested_svm_check_exception(svm, nr, has_error_code, error_code))
301 if (nr == BP_VECTOR && !svm_has(SVM_FEATURE_NRIP)) {
302 unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu);
305 * For guest debugging where we have to reinject #BP if some
306 * INT3 is guest-owned:
307 * Emulate nRIP by moving RIP forward. Will fail if injection
308 * raises a fault that is not intercepted. Still better than
309 * failing in all cases.
311 skip_emulated_instruction(&svm->vcpu);
312 rip = kvm_rip_read(&svm->vcpu);
313 svm->int3_rip = rip + svm->vmcb->save.cs.base;
314 svm->int3_injected = rip - old_rip;
317 svm->vmcb->control.event_inj = nr
319 | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
320 | SVM_EVTINJ_TYPE_EXEPT;
321 svm->vmcb->control.event_inj_err = error_code;
324 static int has_svm(void)
328 if (!cpu_has_svm(&msg)) {
329 printk(KERN_INFO "has_svm: %s\n", msg);
336 static void svm_hardware_disable(void *garbage)
341 static int svm_hardware_enable(void *garbage)
344 struct svm_cpu_data *sd;
346 struct desc_ptr gdt_descr;
347 struct desc_struct *gdt;
348 int me = raw_smp_processor_id();
350 rdmsrl(MSR_EFER, efer);
351 if (efer & EFER_SVME)
355 printk(KERN_ERR "svm_hardware_enable: err EOPNOTSUPP on %d\n",
359 sd = per_cpu(svm_data, me);
362 printk(KERN_ERR "svm_hardware_enable: svm_data is NULL on %d\n",
367 sd->asid_generation = 1;
368 sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
369 sd->next_asid = sd->max_asid + 1;
371 kvm_get_gdt(&gdt_descr);
372 gdt = (struct desc_struct *)gdt_descr.address;
373 sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
375 wrmsrl(MSR_EFER, efer | EFER_SVME);
377 wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
382 static void svm_cpu_uninit(int cpu)
384 struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
389 per_cpu(svm_data, raw_smp_processor_id()) = NULL;
390 __free_page(sd->save_area);
394 static int svm_cpu_init(int cpu)
396 struct svm_cpu_data *sd;
399 sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
403 sd->save_area = alloc_page(GFP_KERNEL);
408 per_cpu(svm_data, cpu) = sd;
418 static void set_msr_interception(u32 *msrpm, unsigned msr,
423 for (i = 0; i < NUM_MSR_MAPS; i++) {
424 if (msr >= msrpm_ranges[i] &&
425 msr < msrpm_ranges[i] + MSRS_IN_RANGE) {
426 u32 msr_offset = (i * MSRS_IN_RANGE + msr -
427 msrpm_ranges[i]) * 2;
429 u32 *base = msrpm + (msr_offset / 32);
430 u32 msr_shift = msr_offset % 32;
431 u32 mask = ((write) ? 0 : 2) | ((read) ? 0 : 1);
432 *base = (*base & ~(0x3 << msr_shift)) |
440 static void svm_vcpu_init_msrpm(u32 *msrpm)
442 memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
445 set_msr_interception(msrpm, MSR_GS_BASE, 1, 1);
446 set_msr_interception(msrpm, MSR_FS_BASE, 1, 1);
447 set_msr_interception(msrpm, MSR_KERNEL_GS_BASE, 1, 1);
448 set_msr_interception(msrpm, MSR_LSTAR, 1, 1);
449 set_msr_interception(msrpm, MSR_CSTAR, 1, 1);
450 set_msr_interception(msrpm, MSR_SYSCALL_MASK, 1, 1);
452 set_msr_interception(msrpm, MSR_K6_STAR, 1, 1);
453 set_msr_interception(msrpm, MSR_IA32_SYSENTER_CS, 1, 1);
456 static void svm_enable_lbrv(struct vcpu_svm *svm)
458 u32 *msrpm = svm->msrpm;
460 svm->vmcb->control.lbr_ctl = 1;
461 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1);
462 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1);
463 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
464 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1);
467 static void svm_disable_lbrv(struct vcpu_svm *svm)
469 u32 *msrpm = svm->msrpm;
471 svm->vmcb->control.lbr_ctl = 0;
472 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0);
473 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0);
474 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0);
475 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0);
478 static __init int svm_hardware_setup(void)
481 struct page *iopm_pages;
485 iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
490 iopm_va = page_address(iopm_pages);
491 memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
492 iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
494 if (boot_cpu_has(X86_FEATURE_NX))
495 kvm_enable_efer_bits(EFER_NX);
497 if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
498 kvm_enable_efer_bits(EFER_FFXSR);
501 printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
502 kvm_enable_efer_bits(EFER_SVME);
505 for_each_possible_cpu(cpu) {
506 r = svm_cpu_init(cpu);
511 svm_features = cpuid_edx(SVM_CPUID_FUNC);
513 if (!svm_has(SVM_FEATURE_NPT))
516 if (npt_enabled && !npt) {
517 printk(KERN_INFO "kvm: Nested Paging disabled\n");
522 printk(KERN_INFO "kvm: Nested Paging enabled\n");
530 __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
535 static __exit void svm_hardware_unsetup(void)
539 for_each_possible_cpu(cpu)
542 __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
546 static void init_seg(struct vmcb_seg *seg)
549 seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
550 SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
555 static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
558 seg->attrib = SVM_SELECTOR_P_MASK | type;
563 static void init_vmcb(struct vcpu_svm *svm)
565 struct vmcb_control_area *control = &svm->vmcb->control;
566 struct vmcb_save_area *save = &svm->vmcb->save;
568 svm->vcpu.fpu_active = 1;
570 control->intercept_cr_read = INTERCEPT_CR0_MASK |
574 control->intercept_cr_write = INTERCEPT_CR0_MASK |
579 control->intercept_dr_read = INTERCEPT_DR0_MASK |
588 control->intercept_dr_write = INTERCEPT_DR0_MASK |
597 control->intercept_exceptions = (1 << PF_VECTOR) |
602 control->intercept = (1ULL << INTERCEPT_INTR) |
603 (1ULL << INTERCEPT_NMI) |
604 (1ULL << INTERCEPT_SMI) |
605 (1ULL << INTERCEPT_SELECTIVE_CR0) |
606 (1ULL << INTERCEPT_CPUID) |
607 (1ULL << INTERCEPT_INVD) |
608 (1ULL << INTERCEPT_HLT) |
609 (1ULL << INTERCEPT_INVLPG) |
610 (1ULL << INTERCEPT_INVLPGA) |
611 (1ULL << INTERCEPT_IOIO_PROT) |
612 (1ULL << INTERCEPT_MSR_PROT) |
613 (1ULL << INTERCEPT_TASK_SWITCH) |
614 (1ULL << INTERCEPT_SHUTDOWN) |
615 (1ULL << INTERCEPT_VMRUN) |
616 (1ULL << INTERCEPT_VMMCALL) |
617 (1ULL << INTERCEPT_VMLOAD) |
618 (1ULL << INTERCEPT_VMSAVE) |
619 (1ULL << INTERCEPT_STGI) |
620 (1ULL << INTERCEPT_CLGI) |
621 (1ULL << INTERCEPT_SKINIT) |
622 (1ULL << INTERCEPT_WBINVD) |
623 (1ULL << INTERCEPT_MONITOR) |
624 (1ULL << INTERCEPT_MWAIT);
626 control->iopm_base_pa = iopm_base;
627 control->msrpm_base_pa = __pa(svm->msrpm);
628 control->tsc_offset = 0;
629 control->int_ctl = V_INTR_MASKING_MASK;
637 save->cs.selector = 0xf000;
638 /* Executable/Readable Code Segment */
639 save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
640 SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
641 save->cs.limit = 0xffff;
643 * cs.base should really be 0xffff0000, but vmx can't handle that, so
644 * be consistent with it.
646 * Replace when we have real mode working for vmx.
648 save->cs.base = 0xf0000;
650 save->gdtr.limit = 0xffff;
651 save->idtr.limit = 0xffff;
653 init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
654 init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
656 save->efer = EFER_SVME;
657 save->dr6 = 0xffff0ff0;
660 save->rip = 0x0000fff0;
661 svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
664 * This is the guest-visible cr0 value.
665 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
667 svm->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET;
668 kvm_set_cr0(&svm->vcpu, svm->vcpu.arch.cr0);
670 save->cr4 = X86_CR4_PAE;
674 /* Setup VMCB for Nested Paging */
675 control->nested_ctl = 1;
676 control->intercept &= ~((1ULL << INTERCEPT_TASK_SWITCH) |
677 (1ULL << INTERCEPT_INVLPG));
678 control->intercept_exceptions &= ~(1 << PF_VECTOR);
679 control->intercept_cr_read &= ~INTERCEPT_CR3_MASK;
680 control->intercept_cr_write &= ~INTERCEPT_CR3_MASK;
681 save->g_pat = 0x0007040600070406ULL;
685 force_new_asid(&svm->vcpu);
687 svm->nested.vmcb = 0;
688 svm->vcpu.arch.hflags = 0;
690 if (svm_has(SVM_FEATURE_PAUSE_FILTER)) {
691 control->pause_filter_count = 3000;
692 control->intercept |= (1ULL << INTERCEPT_PAUSE);
698 static int svm_vcpu_reset(struct kvm_vcpu *vcpu)
700 struct vcpu_svm *svm = to_svm(vcpu);
704 if (!kvm_vcpu_is_bsp(vcpu)) {
705 kvm_rip_write(vcpu, 0);
706 svm->vmcb->save.cs.base = svm->vcpu.arch.sipi_vector << 12;
707 svm->vmcb->save.cs.selector = svm->vcpu.arch.sipi_vector << 8;
709 vcpu->arch.regs_avail = ~0;
710 vcpu->arch.regs_dirty = ~0;
715 static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
717 struct vcpu_svm *svm;
719 struct page *msrpm_pages;
720 struct page *hsave_page;
721 struct page *nested_msrpm_pages;
724 svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
730 err = kvm_vcpu_init(&svm->vcpu, kvm, id);
735 page = alloc_page(GFP_KERNEL);
739 msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
743 nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
744 if (!nested_msrpm_pages)
747 hsave_page = alloc_page(GFP_KERNEL);
751 svm->nested.hsave = page_address(hsave_page);
753 svm->msrpm = page_address(msrpm_pages);
754 svm_vcpu_init_msrpm(svm->msrpm);
756 svm->nested.msrpm = page_address(nested_msrpm_pages);
758 svm->vmcb = page_address(page);
759 clear_page(svm->vmcb);
760 svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
761 svm->asid_generation = 0;
765 svm->vcpu.arch.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
766 if (kvm_vcpu_is_bsp(&svm->vcpu))
767 svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP;
772 __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER);
774 __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
778 kvm_vcpu_uninit(&svm->vcpu);
780 kmem_cache_free(kvm_vcpu_cache, svm);
785 static void svm_free_vcpu(struct kvm_vcpu *vcpu)
787 struct vcpu_svm *svm = to_svm(vcpu);
789 __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT));
790 __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
791 __free_page(virt_to_page(svm->nested.hsave));
792 __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER);
793 kvm_vcpu_uninit(vcpu);
794 kmem_cache_free(kvm_vcpu_cache, svm);
797 static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
799 struct vcpu_svm *svm = to_svm(vcpu);
802 if (unlikely(cpu != vcpu->cpu)) {
805 if (check_tsc_unstable()) {
807 * Make sure that the guest sees a monotonically
810 delta = vcpu->arch.host_tsc - native_read_tsc();
811 svm->vmcb->control.tsc_offset += delta;
813 svm->nested.hsave->control.tsc_offset += delta;
816 kvm_migrate_timers(vcpu);
817 svm->asid_generation = 0;
820 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
821 rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
824 static void svm_vcpu_put(struct kvm_vcpu *vcpu)
826 struct vcpu_svm *svm = to_svm(vcpu);
829 ++vcpu->stat.host_state_reload;
830 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
831 wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
833 vcpu->arch.host_tsc = native_read_tsc();
836 static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
838 return to_svm(vcpu)->vmcb->save.rflags;
841 static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
843 to_svm(vcpu)->vmcb->save.rflags = rflags;
846 static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
849 case VCPU_EXREG_PDPTR:
850 BUG_ON(!npt_enabled);
851 load_pdptrs(vcpu, vcpu->arch.cr3);
858 static void svm_set_vintr(struct vcpu_svm *svm)
860 svm->vmcb->control.intercept |= 1ULL << INTERCEPT_VINTR;
863 static void svm_clear_vintr(struct vcpu_svm *svm)
865 svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VINTR);
868 static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
870 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
873 case VCPU_SREG_CS: return &save->cs;
874 case VCPU_SREG_DS: return &save->ds;
875 case VCPU_SREG_ES: return &save->es;
876 case VCPU_SREG_FS: return &save->fs;
877 case VCPU_SREG_GS: return &save->gs;
878 case VCPU_SREG_SS: return &save->ss;
879 case VCPU_SREG_TR: return &save->tr;
880 case VCPU_SREG_LDTR: return &save->ldtr;
886 static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
888 struct vmcb_seg *s = svm_seg(vcpu, seg);
893 static void svm_get_segment(struct kvm_vcpu *vcpu,
894 struct kvm_segment *var, int seg)
896 struct vmcb_seg *s = svm_seg(vcpu, seg);
899 var->limit = s->limit;
900 var->selector = s->selector;
901 var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
902 var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
903 var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
904 var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
905 var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
906 var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
907 var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
908 var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
911 * AMD's VMCB does not have an explicit unusable field, so emulate it
912 * for cross vendor migration purposes by "not present"
914 var->unusable = !var->present || (var->type == 0);
919 * SVM always stores 0 for the 'G' bit in the CS selector in
920 * the VMCB on a VMEXIT. This hurts cross-vendor migration:
921 * Intel's VMENTRY has a check on the 'G' bit.
923 var->g = s->limit > 0xfffff;
927 * Work around a bug where the busy flag in the tr selector
937 * The accessed bit must always be set in the segment
938 * descriptor cache, although it can be cleared in the
939 * descriptor, the cached bit always remains at 1. Since
940 * Intel has a check on this, set it here to support
941 * cross-vendor migration.
948 * On AMD CPUs sometimes the DB bit in the segment
949 * descriptor is left as 1, although the whole segment has
950 * been made unusable. Clear it here to pass an Intel VMX
951 * entry check when cross vendor migrating.
959 static int svm_get_cpl(struct kvm_vcpu *vcpu)
961 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
966 static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
968 struct vcpu_svm *svm = to_svm(vcpu);
970 dt->size = svm->vmcb->save.idtr.limit;
971 dt->address = svm->vmcb->save.idtr.base;
974 static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
976 struct vcpu_svm *svm = to_svm(vcpu);
978 svm->vmcb->save.idtr.limit = dt->size;
979 svm->vmcb->save.idtr.base = dt->address ;
982 static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
984 struct vcpu_svm *svm = to_svm(vcpu);
986 dt->size = svm->vmcb->save.gdtr.limit;
987 dt->address = svm->vmcb->save.gdtr.base;
990 static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
992 struct vcpu_svm *svm = to_svm(vcpu);
994 svm->vmcb->save.gdtr.limit = dt->size;
995 svm->vmcb->save.gdtr.base = dt->address ;
998 static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
1002 static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
1006 static void update_cr0_intercept(struct vcpu_svm *svm)
1008 struct vmcb *vmcb = svm->vmcb;
1009 ulong gcr0 = svm->vcpu.arch.cr0;
1010 u64 *hcr0 = &svm->vmcb->save.cr0;
1012 if (!svm->vcpu.fpu_active)
1013 *hcr0 |= SVM_CR0_SELECTIVE_MASK;
1015 *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
1016 | (gcr0 & SVM_CR0_SELECTIVE_MASK);
1019 if (gcr0 == *hcr0 && svm->vcpu.fpu_active) {
1020 vmcb->control.intercept_cr_read &= ~INTERCEPT_CR0_MASK;
1021 vmcb->control.intercept_cr_write &= ~INTERCEPT_CR0_MASK;
1022 if (is_nested(svm)) {
1023 struct vmcb *hsave = svm->nested.hsave;
1025 hsave->control.intercept_cr_read &= ~INTERCEPT_CR0_MASK;
1026 hsave->control.intercept_cr_write &= ~INTERCEPT_CR0_MASK;
1027 vmcb->control.intercept_cr_read |= svm->nested.intercept_cr_read;
1028 vmcb->control.intercept_cr_write |= svm->nested.intercept_cr_write;
1031 svm->vmcb->control.intercept_cr_read |= INTERCEPT_CR0_MASK;
1032 svm->vmcb->control.intercept_cr_write |= INTERCEPT_CR0_MASK;
1033 if (is_nested(svm)) {
1034 struct vmcb *hsave = svm->nested.hsave;
1036 hsave->control.intercept_cr_read |= INTERCEPT_CR0_MASK;
1037 hsave->control.intercept_cr_write |= INTERCEPT_CR0_MASK;
1042 static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
1044 struct vcpu_svm *svm = to_svm(vcpu);
1046 if (is_nested(svm)) {
1048 * We are here because we run in nested mode, the host kvm
1049 * intercepts cr0 writes but the l1 hypervisor does not.
1050 * But the L1 hypervisor may intercept selective cr0 writes.
1051 * This needs to be checked here.
1053 unsigned long old, new;
1055 /* Remove bits that would trigger a real cr0 write intercept */
1056 old = vcpu->arch.cr0 & SVM_CR0_SELECTIVE_MASK;
1057 new = cr0 & SVM_CR0_SELECTIVE_MASK;
1060 /* cr0 write with ts and mp unchanged */
1061 svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE;
1062 if (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE)
1067 #ifdef CONFIG_X86_64
1068 if (vcpu->arch.efer & EFER_LME) {
1069 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
1070 vcpu->arch.efer |= EFER_LMA;
1071 svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
1074 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
1075 vcpu->arch.efer &= ~EFER_LMA;
1076 svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
1080 vcpu->arch.cr0 = cr0;
1083 cr0 |= X86_CR0_PG | X86_CR0_WP;
1085 if (!vcpu->fpu_active)
1088 * re-enable caching here because the QEMU bios
1089 * does not do it - this results in some delay at
1092 cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
1093 svm->vmcb->save.cr0 = cr0;
1094 update_cr0_intercept(svm);
1097 static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
1099 unsigned long host_cr4_mce = read_cr4() & X86_CR4_MCE;
1100 unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;
1102 if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
1103 force_new_asid(vcpu);
1105 vcpu->arch.cr4 = cr4;
1108 cr4 |= host_cr4_mce;
1109 to_svm(vcpu)->vmcb->save.cr4 = cr4;
1112 static void svm_set_segment(struct kvm_vcpu *vcpu,
1113 struct kvm_segment *var, int seg)
1115 struct vcpu_svm *svm = to_svm(vcpu);
1116 struct vmcb_seg *s = svm_seg(vcpu, seg);
1118 s->base = var->base;
1119 s->limit = var->limit;
1120 s->selector = var->selector;
1124 s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
1125 s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
1126 s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
1127 s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
1128 s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
1129 s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
1130 s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
1131 s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
1133 if (seg == VCPU_SREG_CS)
1135 = (svm->vmcb->save.cs.attrib
1136 >> SVM_SELECTOR_DPL_SHIFT) & 3;
1140 static void update_db_intercept(struct kvm_vcpu *vcpu)
1142 struct vcpu_svm *svm = to_svm(vcpu);
1144 svm->vmcb->control.intercept_exceptions &=
1145 ~((1 << DB_VECTOR) | (1 << BP_VECTOR));
1147 if (svm->nmi_singlestep)
1148 svm->vmcb->control.intercept_exceptions |= (1 << DB_VECTOR);
1150 if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
1151 if (vcpu->guest_debug &
1152 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
1153 svm->vmcb->control.intercept_exceptions |=
1155 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
1156 svm->vmcb->control.intercept_exceptions |=
1159 vcpu->guest_debug = 0;
1162 static void svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
1164 struct vcpu_svm *svm = to_svm(vcpu);
1166 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
1167 svm->vmcb->save.dr7 = dbg->arch.debugreg[7];
1169 svm->vmcb->save.dr7 = vcpu->arch.dr7;
1171 update_db_intercept(vcpu);
1174 static void load_host_msrs(struct kvm_vcpu *vcpu)
1176 #ifdef CONFIG_X86_64
1177 wrmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base);
1181 static void save_host_msrs(struct kvm_vcpu *vcpu)
1183 #ifdef CONFIG_X86_64
1184 rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base);
1188 static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
1190 if (sd->next_asid > sd->max_asid) {
1191 ++sd->asid_generation;
1193 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
1196 svm->asid_generation = sd->asid_generation;
1197 svm->vmcb->control.asid = sd->next_asid++;
1200 static int svm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *dest)
1202 struct vcpu_svm *svm = to_svm(vcpu);
1206 *dest = vcpu->arch.db[dr];
1209 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
1210 return EMULATE_FAIL; /* will re-inject UD */
1213 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
1214 *dest = vcpu->arch.dr6;
1216 *dest = svm->vmcb->save.dr6;
1219 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
1220 return EMULATE_FAIL; /* will re-inject UD */
1223 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
1224 *dest = vcpu->arch.dr7;
1226 *dest = svm->vmcb->save.dr7;
1230 return EMULATE_DONE;
1233 static int svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value)
1235 struct vcpu_svm *svm = to_svm(vcpu);
1239 vcpu->arch.db[dr] = value;
1240 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
1241 vcpu->arch.eff_db[dr] = value;
1244 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
1245 return EMULATE_FAIL; /* will re-inject UD */
1248 vcpu->arch.dr6 = (value & DR6_VOLATILE) | DR6_FIXED_1;
1251 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
1252 return EMULATE_FAIL; /* will re-inject UD */
1255 vcpu->arch.dr7 = (value & DR7_VOLATILE) | DR7_FIXED_1;
1256 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
1257 svm->vmcb->save.dr7 = vcpu->arch.dr7;
1258 vcpu->arch.switch_db_regs = (value & DR7_BP_EN_MASK);
1263 return EMULATE_DONE;
1266 static int pf_interception(struct vcpu_svm *svm)
1271 fault_address = svm->vmcb->control.exit_info_2;
1272 error_code = svm->vmcb->control.exit_info_1;
1274 trace_kvm_page_fault(fault_address, error_code);
1275 if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu))
1276 kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address);
1277 return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code);
1280 static int db_interception(struct vcpu_svm *svm)
1282 struct kvm_run *kvm_run = svm->vcpu.run;
1284 if (!(svm->vcpu.guest_debug &
1285 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
1286 !svm->nmi_singlestep) {
1287 kvm_queue_exception(&svm->vcpu, DB_VECTOR);
1291 if (svm->nmi_singlestep) {
1292 svm->nmi_singlestep = false;
1293 if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP))
1294 svm->vmcb->save.rflags &=
1295 ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
1296 update_db_intercept(&svm->vcpu);
1299 if (svm->vcpu.guest_debug &
1300 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
1301 kvm_run->exit_reason = KVM_EXIT_DEBUG;
1302 kvm_run->debug.arch.pc =
1303 svm->vmcb->save.cs.base + svm->vmcb->save.rip;
1304 kvm_run->debug.arch.exception = DB_VECTOR;
1311 static int bp_interception(struct vcpu_svm *svm)
1313 struct kvm_run *kvm_run = svm->vcpu.run;
1315 kvm_run->exit_reason = KVM_EXIT_DEBUG;
1316 kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip;
1317 kvm_run->debug.arch.exception = BP_VECTOR;
1321 static int ud_interception(struct vcpu_svm *svm)
1325 er = emulate_instruction(&svm->vcpu, 0, 0, EMULTYPE_TRAP_UD);
1326 if (er != EMULATE_DONE)
1327 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
1331 static void svm_fpu_activate(struct kvm_vcpu *vcpu)
1333 struct vcpu_svm *svm = to_svm(vcpu);
1336 if (is_nested(svm)) {
1339 h_excp = svm->nested.hsave->control.intercept_exceptions;
1340 n_excp = svm->nested.intercept_exceptions;
1341 h_excp &= ~(1 << NM_VECTOR);
1342 excp = h_excp | n_excp;
1344 excp = svm->vmcb->control.intercept_exceptions;
1345 excp &= ~(1 << NM_VECTOR);
1348 svm->vmcb->control.intercept_exceptions = excp;
1350 svm->vcpu.fpu_active = 1;
1351 update_cr0_intercept(svm);
1354 static int nm_interception(struct vcpu_svm *svm)
1356 svm_fpu_activate(&svm->vcpu);
1360 static int mc_interception(struct vcpu_svm *svm)
1363 * On an #MC intercept the MCE handler is not called automatically in
1364 * the host. So do it by hand here.
1368 /* not sure if we ever come back to this point */
1373 static int shutdown_interception(struct vcpu_svm *svm)
1375 struct kvm_run *kvm_run = svm->vcpu.run;
1378 * VMCB is undefined after a SHUTDOWN intercept
1379 * so reinitialize it.
1381 clear_page(svm->vmcb);
1384 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
1388 static int io_interception(struct vcpu_svm *svm)
1390 u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
1391 int size, in, string;
1394 ++svm->vcpu.stat.io_exits;
1396 svm->next_rip = svm->vmcb->control.exit_info_2;
1398 string = (io_info & SVM_IOIO_STR_MASK) != 0;
1401 if (emulate_instruction(&svm->vcpu,
1402 0, 0, 0) == EMULATE_DO_MMIO)
1407 in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
1408 port = io_info >> 16;
1409 size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
1411 skip_emulated_instruction(&svm->vcpu);
1412 return kvm_emulate_pio(&svm->vcpu, in, size, port);
1415 static int nmi_interception(struct vcpu_svm *svm)
1420 static int intr_interception(struct vcpu_svm *svm)
1422 ++svm->vcpu.stat.irq_exits;
1426 static int nop_on_interception(struct vcpu_svm *svm)
1431 static int halt_interception(struct vcpu_svm *svm)
1433 svm->next_rip = kvm_rip_read(&svm->vcpu) + 1;
1434 skip_emulated_instruction(&svm->vcpu);
1435 return kvm_emulate_halt(&svm->vcpu);
1438 static int vmmcall_interception(struct vcpu_svm *svm)
1440 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
1441 skip_emulated_instruction(&svm->vcpu);
1442 kvm_emulate_hypercall(&svm->vcpu);
1446 static int nested_svm_check_permissions(struct vcpu_svm *svm)
1448 if (!(svm->vcpu.arch.efer & EFER_SVME)
1449 || !is_paging(&svm->vcpu)) {
1450 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
1454 if (svm->vmcb->save.cpl) {
1455 kvm_inject_gp(&svm->vcpu, 0);
1462 static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
1463 bool has_error_code, u32 error_code)
1467 if (!is_nested(svm))
1470 svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
1471 svm->vmcb->control.exit_code_hi = 0;
1472 svm->vmcb->control.exit_info_1 = error_code;
1473 svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
1475 vmexit = nested_svm_intercept(svm);
1476 if (vmexit == NESTED_EXIT_DONE)
1477 svm->nested.exit_required = true;
1482 /* This function returns true if it is save to enable the irq window */
1483 static inline bool nested_svm_intr(struct vcpu_svm *svm)
1485 if (!is_nested(svm))
1488 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
1491 if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
1494 svm->vmcb->control.exit_code = SVM_EXIT_INTR;
1496 if (svm->nested.intercept & 1ULL) {
1498 * The #vmexit can't be emulated here directly because this
1499 * code path runs with irqs and preemtion disabled. A
1500 * #vmexit emulation might sleep. Only signal request for
1503 svm->nested.exit_required = true;
1504 trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
1511 /* This function returns true if it is save to enable the nmi window */
1512 static inline bool nested_svm_nmi(struct vcpu_svm *svm)
1514 if (!is_nested(svm))
1517 if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI)))
1520 svm->vmcb->control.exit_code = SVM_EXIT_NMI;
1521 svm->nested.exit_required = true;
1526 static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
1532 page = gfn_to_page(svm->vcpu.kvm, gpa >> PAGE_SHIFT);
1533 if (is_error_page(page))
1541 kvm_release_page_clean(page);
1542 kvm_inject_gp(&svm->vcpu, 0);
1547 static void nested_svm_unmap(struct page *page)
1550 kvm_release_page_dirty(page);
1553 static bool nested_svm_exit_handled_msr(struct vcpu_svm *svm)
1555 u32 param = svm->vmcb->control.exit_info_1 & 1;
1556 u32 msr = svm->vcpu.arch.regs[VCPU_REGS_RCX];
1561 if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
1569 case 0xc0000000 ... 0xc0001fff:
1570 t0 = (8192 + msr - 0xc0000000) * 2;
1574 case 0xc0010000 ... 0xc0011fff:
1575 t0 = (16384 + msr - 0xc0010000) * 2;
1584 if (!kvm_read_guest(svm->vcpu.kvm, svm->nested.vmcb_msrpm + t1, &val, 1))
1585 ret = val & ((1 << param) << t0);
1591 static int nested_svm_exit_special(struct vcpu_svm *svm)
1593 u32 exit_code = svm->vmcb->control.exit_code;
1595 switch (exit_code) {
1598 return NESTED_EXIT_HOST;
1600 /* For now we are always handling NPFs when using them */
1602 return NESTED_EXIT_HOST;
1604 case SVM_EXIT_EXCP_BASE + PF_VECTOR:
1605 /* When we're shadowing, trap PFs */
1607 return NESTED_EXIT_HOST;
1609 case SVM_EXIT_EXCP_BASE + NM_VECTOR:
1610 nm_interception(svm);
1616 return NESTED_EXIT_CONTINUE;
1620 * If this function returns true, this #vmexit was already handled
1622 static int nested_svm_intercept(struct vcpu_svm *svm)
1624 u32 exit_code = svm->vmcb->control.exit_code;
1625 int vmexit = NESTED_EXIT_HOST;
1627 switch (exit_code) {
1629 vmexit = nested_svm_exit_handled_msr(svm);
1631 case SVM_EXIT_READ_CR0 ... SVM_EXIT_READ_CR8: {
1632 u32 cr_bits = 1 << (exit_code - SVM_EXIT_READ_CR0);
1633 if (svm->nested.intercept_cr_read & cr_bits)
1634 vmexit = NESTED_EXIT_DONE;
1637 case SVM_EXIT_WRITE_CR0 ... SVM_EXIT_WRITE_CR8: {
1638 u32 cr_bits = 1 << (exit_code - SVM_EXIT_WRITE_CR0);
1639 if (svm->nested.intercept_cr_write & cr_bits)
1640 vmexit = NESTED_EXIT_DONE;
1643 case SVM_EXIT_READ_DR0 ... SVM_EXIT_READ_DR7: {
1644 u32 dr_bits = 1 << (exit_code - SVM_EXIT_READ_DR0);
1645 if (svm->nested.intercept_dr_read & dr_bits)
1646 vmexit = NESTED_EXIT_DONE;
1649 case SVM_EXIT_WRITE_DR0 ... SVM_EXIT_WRITE_DR7: {
1650 u32 dr_bits = 1 << (exit_code - SVM_EXIT_WRITE_DR0);
1651 if (svm->nested.intercept_dr_write & dr_bits)
1652 vmexit = NESTED_EXIT_DONE;
1655 case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
1656 u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
1657 if (svm->nested.intercept_exceptions & excp_bits)
1658 vmexit = NESTED_EXIT_DONE;
1662 u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
1663 if (svm->nested.intercept & exit_bits)
1664 vmexit = NESTED_EXIT_DONE;
1671 static int nested_svm_exit_handled(struct vcpu_svm *svm)
1675 vmexit = nested_svm_intercept(svm);
1677 if (vmexit == NESTED_EXIT_DONE)
1678 nested_svm_vmexit(svm);
1683 static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb)
1685 struct vmcb_control_area *dst = &dst_vmcb->control;
1686 struct vmcb_control_area *from = &from_vmcb->control;
1688 dst->intercept_cr_read = from->intercept_cr_read;
1689 dst->intercept_cr_write = from->intercept_cr_write;
1690 dst->intercept_dr_read = from->intercept_dr_read;
1691 dst->intercept_dr_write = from->intercept_dr_write;
1692 dst->intercept_exceptions = from->intercept_exceptions;
1693 dst->intercept = from->intercept;
1694 dst->iopm_base_pa = from->iopm_base_pa;
1695 dst->msrpm_base_pa = from->msrpm_base_pa;
1696 dst->tsc_offset = from->tsc_offset;
1697 dst->asid = from->asid;
1698 dst->tlb_ctl = from->tlb_ctl;
1699 dst->int_ctl = from->int_ctl;
1700 dst->int_vector = from->int_vector;
1701 dst->int_state = from->int_state;
1702 dst->exit_code = from->exit_code;
1703 dst->exit_code_hi = from->exit_code_hi;
1704 dst->exit_info_1 = from->exit_info_1;
1705 dst->exit_info_2 = from->exit_info_2;
1706 dst->exit_int_info = from->exit_int_info;
1707 dst->exit_int_info_err = from->exit_int_info_err;
1708 dst->nested_ctl = from->nested_ctl;
1709 dst->event_inj = from->event_inj;
1710 dst->event_inj_err = from->event_inj_err;
1711 dst->nested_cr3 = from->nested_cr3;
1712 dst->lbr_ctl = from->lbr_ctl;
1715 static int nested_svm_vmexit(struct vcpu_svm *svm)
1717 struct vmcb *nested_vmcb;
1718 struct vmcb *hsave = svm->nested.hsave;
1719 struct vmcb *vmcb = svm->vmcb;
1722 trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
1723 vmcb->control.exit_info_1,
1724 vmcb->control.exit_info_2,
1725 vmcb->control.exit_int_info,
1726 vmcb->control.exit_int_info_err);
1728 nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page);
1732 /* Exit nested SVM mode */
1733 svm->nested.vmcb = 0;
1735 /* Give the current vmcb to the guest */
1738 nested_vmcb->save.es = vmcb->save.es;
1739 nested_vmcb->save.cs = vmcb->save.cs;
1740 nested_vmcb->save.ss = vmcb->save.ss;
1741 nested_vmcb->save.ds = vmcb->save.ds;
1742 nested_vmcb->save.gdtr = vmcb->save.gdtr;
1743 nested_vmcb->save.idtr = vmcb->save.idtr;
1744 nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu);
1746 nested_vmcb->save.cr3 = vmcb->save.cr3;
1748 nested_vmcb->save.cr3 = svm->vcpu.arch.cr3;
1749 nested_vmcb->save.cr2 = vmcb->save.cr2;
1750 nested_vmcb->save.cr4 = svm->vcpu.arch.cr4;
1751 nested_vmcb->save.rflags = vmcb->save.rflags;
1752 nested_vmcb->save.rip = vmcb->save.rip;
1753 nested_vmcb->save.rsp = vmcb->save.rsp;
1754 nested_vmcb->save.rax = vmcb->save.rax;
1755 nested_vmcb->save.dr7 = vmcb->save.dr7;
1756 nested_vmcb->save.dr6 = vmcb->save.dr6;
1757 nested_vmcb->save.cpl = vmcb->save.cpl;
1759 nested_vmcb->control.int_ctl = vmcb->control.int_ctl;
1760 nested_vmcb->control.int_vector = vmcb->control.int_vector;
1761 nested_vmcb->control.int_state = vmcb->control.int_state;
1762 nested_vmcb->control.exit_code = vmcb->control.exit_code;
1763 nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi;
1764 nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1;
1765 nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2;
1766 nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info;
1767 nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err;
1770 * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have
1771 * to make sure that we do not lose injected events. So check event_inj
1772 * here and copy it to exit_int_info if it is valid.
1773 * Exit_int_info and event_inj can't be both valid because the case
1774 * below only happens on a VMRUN instruction intercept which has
1775 * no valid exit_int_info set.
1777 if (vmcb->control.event_inj & SVM_EVTINJ_VALID) {
1778 struct vmcb_control_area *nc = &nested_vmcb->control;
1780 nc->exit_int_info = vmcb->control.event_inj;
1781 nc->exit_int_info_err = vmcb->control.event_inj_err;
1784 nested_vmcb->control.tlb_ctl = 0;
1785 nested_vmcb->control.event_inj = 0;
1786 nested_vmcb->control.event_inj_err = 0;
1788 /* We always set V_INTR_MASKING and remember the old value in hflags */
1789 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
1790 nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;
1792 /* Restore the original control entries */
1793 copy_vmcb_control_area(vmcb, hsave);
1795 kvm_clear_exception_queue(&svm->vcpu);
1796 kvm_clear_interrupt_queue(&svm->vcpu);
1798 /* Restore selected save entries */
1799 svm->vmcb->save.es = hsave->save.es;
1800 svm->vmcb->save.cs = hsave->save.cs;
1801 svm->vmcb->save.ss = hsave->save.ss;
1802 svm->vmcb->save.ds = hsave->save.ds;
1803 svm->vmcb->save.gdtr = hsave->save.gdtr;
1804 svm->vmcb->save.idtr = hsave->save.idtr;
1805 svm->vmcb->save.rflags = hsave->save.rflags;
1806 svm_set_efer(&svm->vcpu, hsave->save.efer);
1807 svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE);
1808 svm_set_cr4(&svm->vcpu, hsave->save.cr4);
1810 svm->vmcb->save.cr3 = hsave->save.cr3;
1811 svm->vcpu.arch.cr3 = hsave->save.cr3;
1813 kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
1815 kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax);
1816 kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp);
1817 kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip);
1818 svm->vmcb->save.dr7 = 0;
1819 svm->vmcb->save.cpl = 0;
1820 svm->vmcb->control.exit_int_info = 0;
1822 nested_svm_unmap(page);
1824 kvm_mmu_reset_context(&svm->vcpu);
1825 kvm_mmu_load(&svm->vcpu);
1830 static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
1836 nested_msrpm = nested_svm_map(svm, svm->nested.vmcb_msrpm, &page);
1840 for (i = 0; i < PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER) / 4; i++)
1841 svm->nested.msrpm[i] = svm->msrpm[i] | nested_msrpm[i];
1843 svm->vmcb->control.msrpm_base_pa = __pa(svm->nested.msrpm);
1845 nested_svm_unmap(page);
1850 static bool nested_svm_vmrun(struct vcpu_svm *svm)
1852 struct vmcb *nested_vmcb;
1853 struct vmcb *hsave = svm->nested.hsave;
1854 struct vmcb *vmcb = svm->vmcb;
1858 vmcb_gpa = svm->vmcb->save.rax;
1860 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
1864 trace_kvm_nested_vmrun(svm->vmcb->save.rip - 3, vmcb_gpa,
1865 nested_vmcb->save.rip,
1866 nested_vmcb->control.int_ctl,
1867 nested_vmcb->control.event_inj,
1868 nested_vmcb->control.nested_ctl);
1870 trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr_read,
1871 nested_vmcb->control.intercept_cr_write,
1872 nested_vmcb->control.intercept_exceptions,
1873 nested_vmcb->control.intercept);
1875 /* Clear internal status */
1876 kvm_clear_exception_queue(&svm->vcpu);
1877 kvm_clear_interrupt_queue(&svm->vcpu);
1880 * Save the old vmcb, so we don't need to pick what we save, but can
1881 * restore everything when a VMEXIT occurs
1883 hsave->save.es = vmcb->save.es;
1884 hsave->save.cs = vmcb->save.cs;
1885 hsave->save.ss = vmcb->save.ss;
1886 hsave->save.ds = vmcb->save.ds;
1887 hsave->save.gdtr = vmcb->save.gdtr;
1888 hsave->save.idtr = vmcb->save.idtr;
1889 hsave->save.efer = svm->vcpu.arch.efer;
1890 hsave->save.cr0 = kvm_read_cr0(&svm->vcpu);
1891 hsave->save.cr4 = svm->vcpu.arch.cr4;
1892 hsave->save.rflags = vmcb->save.rflags;
1893 hsave->save.rip = svm->next_rip;
1894 hsave->save.rsp = vmcb->save.rsp;
1895 hsave->save.rax = vmcb->save.rax;
1897 hsave->save.cr3 = vmcb->save.cr3;
1899 hsave->save.cr3 = svm->vcpu.arch.cr3;
1901 copy_vmcb_control_area(hsave, vmcb);
1903 if (svm->vmcb->save.rflags & X86_EFLAGS_IF)
1904 svm->vcpu.arch.hflags |= HF_HIF_MASK;
1906 svm->vcpu.arch.hflags &= ~HF_HIF_MASK;
1908 /* Load the nested guest state */
1909 svm->vmcb->save.es = nested_vmcb->save.es;
1910 svm->vmcb->save.cs = nested_vmcb->save.cs;
1911 svm->vmcb->save.ss = nested_vmcb->save.ss;
1912 svm->vmcb->save.ds = nested_vmcb->save.ds;
1913 svm->vmcb->save.gdtr = nested_vmcb->save.gdtr;
1914 svm->vmcb->save.idtr = nested_vmcb->save.idtr;
1915 svm->vmcb->save.rflags = nested_vmcb->save.rflags;
1916 svm_set_efer(&svm->vcpu, nested_vmcb->save.efer);
1917 svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0);
1918 svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4);
1920 svm->vmcb->save.cr3 = nested_vmcb->save.cr3;
1921 svm->vcpu.arch.cr3 = nested_vmcb->save.cr3;
1923 kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
1925 /* Guest paging mode is active - reset mmu */
1926 kvm_mmu_reset_context(&svm->vcpu);
1928 svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
1929 kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax);
1930 kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp);
1931 kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip);
1933 /* In case we don't even reach vcpu_run, the fields are not updated */
1934 svm->vmcb->save.rax = nested_vmcb->save.rax;
1935 svm->vmcb->save.rsp = nested_vmcb->save.rsp;
1936 svm->vmcb->save.rip = nested_vmcb->save.rip;
1937 svm->vmcb->save.dr7 = nested_vmcb->save.dr7;
1938 svm->vmcb->save.dr6 = nested_vmcb->save.dr6;
1939 svm->vmcb->save.cpl = nested_vmcb->save.cpl;
1941 svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa;
1943 /* cache intercepts */
1944 svm->nested.intercept_cr_read = nested_vmcb->control.intercept_cr_read;
1945 svm->nested.intercept_cr_write = nested_vmcb->control.intercept_cr_write;
1946 svm->nested.intercept_dr_read = nested_vmcb->control.intercept_dr_read;
1947 svm->nested.intercept_dr_write = nested_vmcb->control.intercept_dr_write;
1948 svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
1949 svm->nested.intercept = nested_vmcb->control.intercept;
1951 force_new_asid(&svm->vcpu);
1952 svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK;
1953 if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
1954 svm->vcpu.arch.hflags |= HF_VINTR_MASK;
1956 svm->vcpu.arch.hflags &= ~HF_VINTR_MASK;
1958 if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
1959 /* We only want the cr8 intercept bits of the guest */
1960 svm->vmcb->control.intercept_cr_read &= ~INTERCEPT_CR8_MASK;
1961 svm->vmcb->control.intercept_cr_write &= ~INTERCEPT_CR8_MASK;
1965 * We don't want a nested guest to be more powerful than the guest, so
1966 * all intercepts are ORed
1968 svm->vmcb->control.intercept_cr_read |=
1969 nested_vmcb->control.intercept_cr_read;
1970 svm->vmcb->control.intercept_cr_write |=
1971 nested_vmcb->control.intercept_cr_write;
1972 svm->vmcb->control.intercept_dr_read |=
1973 nested_vmcb->control.intercept_dr_read;
1974 svm->vmcb->control.intercept_dr_write |=
1975 nested_vmcb->control.intercept_dr_write;
1976 svm->vmcb->control.intercept_exceptions |=
1977 nested_vmcb->control.intercept_exceptions;
1979 svm->vmcb->control.intercept |= nested_vmcb->control.intercept;
1981 svm->vmcb->control.lbr_ctl = nested_vmcb->control.lbr_ctl;
1982 svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
1983 svm->vmcb->control.int_state = nested_vmcb->control.int_state;
1984 svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset;
1985 svm->vmcb->control.event_inj = nested_vmcb->control.event_inj;
1986 svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err;
1988 nested_svm_unmap(page);
1990 /* nested_vmcb is our indicator if nested SVM is activated */
1991 svm->nested.vmcb = vmcb_gpa;
1998 static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
2000 to_vmcb->save.fs = from_vmcb->save.fs;
2001 to_vmcb->save.gs = from_vmcb->save.gs;
2002 to_vmcb->save.tr = from_vmcb->save.tr;
2003 to_vmcb->save.ldtr = from_vmcb->save.ldtr;
2004 to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base;
2005 to_vmcb->save.star = from_vmcb->save.star;
2006 to_vmcb->save.lstar = from_vmcb->save.lstar;
2007 to_vmcb->save.cstar = from_vmcb->save.cstar;
2008 to_vmcb->save.sfmask = from_vmcb->save.sfmask;
2009 to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs;
2010 to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp;
2011 to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip;
2014 static int vmload_interception(struct vcpu_svm *svm)
2016 struct vmcb *nested_vmcb;
2019 if (nested_svm_check_permissions(svm))
2022 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2023 skip_emulated_instruction(&svm->vcpu);
2025 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
2029 nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
2030 nested_svm_unmap(page);
2035 static int vmsave_interception(struct vcpu_svm *svm)
2037 struct vmcb *nested_vmcb;
2040 if (nested_svm_check_permissions(svm))
2043 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2044 skip_emulated_instruction(&svm->vcpu);
2046 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
2050 nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
2051 nested_svm_unmap(page);
2056 static int vmrun_interception(struct vcpu_svm *svm)
2058 if (nested_svm_check_permissions(svm))
2061 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2062 skip_emulated_instruction(&svm->vcpu);
2064 if (!nested_svm_vmrun(svm))
2067 if (!nested_svm_vmrun_msrpm(svm))
2074 svm->vmcb->control.exit_code = SVM_EXIT_ERR;
2075 svm->vmcb->control.exit_code_hi = 0;
2076 svm->vmcb->control.exit_info_1 = 0;
2077 svm->vmcb->control.exit_info_2 = 0;
2079 nested_svm_vmexit(svm);
2084 static int stgi_interception(struct vcpu_svm *svm)
2086 if (nested_svm_check_permissions(svm))
2089 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2090 skip_emulated_instruction(&svm->vcpu);
2097 static int clgi_interception(struct vcpu_svm *svm)
2099 if (nested_svm_check_permissions(svm))
2102 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2103 skip_emulated_instruction(&svm->vcpu);
2107 /* After a CLGI no interrupts should come */
2108 svm_clear_vintr(svm);
2109 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
2114 static int invlpga_interception(struct vcpu_svm *svm)
2116 struct kvm_vcpu *vcpu = &svm->vcpu;
2118 trace_kvm_invlpga(svm->vmcb->save.rip, vcpu->arch.regs[VCPU_REGS_RCX],
2119 vcpu->arch.regs[VCPU_REGS_RAX]);
2121 /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
2122 kvm_mmu_invlpg(vcpu, vcpu->arch.regs[VCPU_REGS_RAX]);
2124 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2125 skip_emulated_instruction(&svm->vcpu);
2129 static int skinit_interception(struct vcpu_svm *svm)
2131 trace_kvm_skinit(svm->vmcb->save.rip, svm->vcpu.arch.regs[VCPU_REGS_RAX]);
2133 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2137 static int invalid_op_interception(struct vcpu_svm *svm)
2139 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2143 static int task_switch_interception(struct vcpu_svm *svm)
2147 int int_type = svm->vmcb->control.exit_int_info &
2148 SVM_EXITINTINFO_TYPE_MASK;
2149 int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
2151 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK;
2153 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID;
2155 tss_selector = (u16)svm->vmcb->control.exit_info_1;
2157 if (svm->vmcb->control.exit_info_2 &
2158 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
2159 reason = TASK_SWITCH_IRET;
2160 else if (svm->vmcb->control.exit_info_2 &
2161 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
2162 reason = TASK_SWITCH_JMP;
2164 reason = TASK_SWITCH_GATE;
2166 reason = TASK_SWITCH_CALL;
2168 if (reason == TASK_SWITCH_GATE) {
2170 case SVM_EXITINTINFO_TYPE_NMI:
2171 svm->vcpu.arch.nmi_injected = false;
2173 case SVM_EXITINTINFO_TYPE_EXEPT:
2174 kvm_clear_exception_queue(&svm->vcpu);
2176 case SVM_EXITINTINFO_TYPE_INTR:
2177 kvm_clear_interrupt_queue(&svm->vcpu);
2184 if (reason != TASK_SWITCH_GATE ||
2185 int_type == SVM_EXITINTINFO_TYPE_SOFT ||
2186 (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
2187 (int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
2188 skip_emulated_instruction(&svm->vcpu);
2190 return kvm_task_switch(&svm->vcpu, tss_selector, reason);
2193 static int cpuid_interception(struct vcpu_svm *svm)
2195 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
2196 kvm_emulate_cpuid(&svm->vcpu);
2200 static int iret_interception(struct vcpu_svm *svm)
2202 ++svm->vcpu.stat.nmi_window_exits;
2203 svm->vmcb->control.intercept &= ~(1UL << INTERCEPT_IRET);
2204 svm->vcpu.arch.hflags |= HF_IRET_MASK;
2208 static int invlpg_interception(struct vcpu_svm *svm)
2210 if (emulate_instruction(&svm->vcpu, 0, 0, 0) != EMULATE_DONE)
2211 pr_unimpl(&svm->vcpu, "%s: failed\n", __func__);
2215 static int emulate_on_interception(struct vcpu_svm *svm)
2217 if (emulate_instruction(&svm->vcpu, 0, 0, 0) != EMULATE_DONE)
2218 pr_unimpl(&svm->vcpu, "%s: failed\n", __func__);
2222 static int cr8_write_interception(struct vcpu_svm *svm)
2224 struct kvm_run *kvm_run = svm->vcpu.run;
2226 u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
2227 /* instruction emulation calls kvm_set_cr8() */
2228 emulate_instruction(&svm->vcpu, 0, 0, 0);
2229 if (irqchip_in_kernel(svm->vcpu.kvm)) {
2230 svm->vmcb->control.intercept_cr_write &= ~INTERCEPT_CR8_MASK;
2233 if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
2235 kvm_run->exit_reason = KVM_EXIT_SET_TPR;
2239 static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
2241 struct vcpu_svm *svm = to_svm(vcpu);
2244 case MSR_IA32_TSC: {
2248 tsc_offset = svm->nested.hsave->control.tsc_offset;
2250 tsc_offset = svm->vmcb->control.tsc_offset;
2252 *data = tsc_offset + native_read_tsc();
2256 *data = svm->vmcb->save.star;
2258 #ifdef CONFIG_X86_64
2260 *data = svm->vmcb->save.lstar;
2263 *data = svm->vmcb->save.cstar;
2265 case MSR_KERNEL_GS_BASE:
2266 *data = svm->vmcb->save.kernel_gs_base;
2268 case MSR_SYSCALL_MASK:
2269 *data = svm->vmcb->save.sfmask;
2272 case MSR_IA32_SYSENTER_CS:
2273 *data = svm->vmcb->save.sysenter_cs;
2275 case MSR_IA32_SYSENTER_EIP:
2276 *data = svm->sysenter_eip;
2278 case MSR_IA32_SYSENTER_ESP:
2279 *data = svm->sysenter_esp;
2282 * Nobody will change the following 5 values in the VMCB so we can
2283 * safely return them on rdmsr. They will always be 0 until LBRV is
2286 case MSR_IA32_DEBUGCTLMSR:
2287 *data = svm->vmcb->save.dbgctl;
2289 case MSR_IA32_LASTBRANCHFROMIP:
2290 *data = svm->vmcb->save.br_from;
2292 case MSR_IA32_LASTBRANCHTOIP:
2293 *data = svm->vmcb->save.br_to;
2295 case MSR_IA32_LASTINTFROMIP:
2296 *data = svm->vmcb->save.last_excp_from;
2298 case MSR_IA32_LASTINTTOIP:
2299 *data = svm->vmcb->save.last_excp_to;
2301 case MSR_VM_HSAVE_PA:
2302 *data = svm->nested.hsave_msr;
2305 *data = svm->nested.vm_cr_msr;
2307 case MSR_IA32_UCODE_REV:
2311 return kvm_get_msr_common(vcpu, ecx, data);
2316 static int rdmsr_interception(struct vcpu_svm *svm)
2318 u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX];
2321 if (svm_get_msr(&svm->vcpu, ecx, &data)) {
2322 trace_kvm_msr_read_ex(ecx);
2323 kvm_inject_gp(&svm->vcpu, 0);
2325 trace_kvm_msr_read(ecx, data);
2327 svm->vcpu.arch.regs[VCPU_REGS_RAX] = data & 0xffffffff;
2328 svm->vcpu.arch.regs[VCPU_REGS_RDX] = data >> 32;
2329 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
2330 skip_emulated_instruction(&svm->vcpu);
2335 static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data)
2337 struct vcpu_svm *svm = to_svm(vcpu);
2338 int svm_dis, chg_mask;
2340 if (data & ~SVM_VM_CR_VALID_MASK)
2343 chg_mask = SVM_VM_CR_VALID_MASK;
2345 if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK)
2346 chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK);
2348 svm->nested.vm_cr_msr &= ~chg_mask;
2349 svm->nested.vm_cr_msr |= (data & chg_mask);
2351 svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK;
2353 /* check for svm_disable while efer.svme is set */
2354 if (svm_dis && (vcpu->arch.efer & EFER_SVME))
2360 static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
2362 struct vcpu_svm *svm = to_svm(vcpu);
2365 case MSR_IA32_TSC: {
2366 u64 tsc_offset = data - native_read_tsc();
2367 u64 g_tsc_offset = 0;
2369 if (is_nested(svm)) {
2370 g_tsc_offset = svm->vmcb->control.tsc_offset -
2371 svm->nested.hsave->control.tsc_offset;
2372 svm->nested.hsave->control.tsc_offset = tsc_offset;
2375 svm->vmcb->control.tsc_offset = tsc_offset + g_tsc_offset;
2380 svm->vmcb->save.star = data;
2382 #ifdef CONFIG_X86_64
2384 svm->vmcb->save.lstar = data;
2387 svm->vmcb->save.cstar = data;
2389 case MSR_KERNEL_GS_BASE:
2390 svm->vmcb->save.kernel_gs_base = data;
2392 case MSR_SYSCALL_MASK:
2393 svm->vmcb->save.sfmask = data;
2396 case MSR_IA32_SYSENTER_CS:
2397 svm->vmcb->save.sysenter_cs = data;
2399 case MSR_IA32_SYSENTER_EIP:
2400 svm->sysenter_eip = data;
2401 svm->vmcb->save.sysenter_eip = data;
2403 case MSR_IA32_SYSENTER_ESP:
2404 svm->sysenter_esp = data;
2405 svm->vmcb->save.sysenter_esp = data;
2407 case MSR_IA32_DEBUGCTLMSR:
2408 if (!svm_has(SVM_FEATURE_LBRV)) {
2409 pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
2413 if (data & DEBUGCTL_RESERVED_BITS)
2416 svm->vmcb->save.dbgctl = data;
2417 if (data & (1ULL<<0))
2418 svm_enable_lbrv(svm);
2420 svm_disable_lbrv(svm);
2422 case MSR_VM_HSAVE_PA:
2423 svm->nested.hsave_msr = data;
2426 return svm_set_vm_cr(vcpu, data);
2428 pr_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
2431 return kvm_set_msr_common(vcpu, ecx, data);
2436 static int wrmsr_interception(struct vcpu_svm *svm)
2438 u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX];
2439 u64 data = (svm->vcpu.arch.regs[VCPU_REGS_RAX] & -1u)
2440 | ((u64)(svm->vcpu.arch.regs[VCPU_REGS_RDX] & -1u) << 32);
2443 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
2444 if (svm_set_msr(&svm->vcpu, ecx, data)) {
2445 trace_kvm_msr_write_ex(ecx, data);
2446 kvm_inject_gp(&svm->vcpu, 0);
2448 trace_kvm_msr_write(ecx, data);
2449 skip_emulated_instruction(&svm->vcpu);
2454 static int msr_interception(struct vcpu_svm *svm)
2456 if (svm->vmcb->control.exit_info_1)
2457 return wrmsr_interception(svm);
2459 return rdmsr_interception(svm);
2462 static int interrupt_window_interception(struct vcpu_svm *svm)
2464 struct kvm_run *kvm_run = svm->vcpu.run;
2466 svm_clear_vintr(svm);
2467 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
2469 * If the user space waits to inject interrupts, exit as soon as
2472 if (!irqchip_in_kernel(svm->vcpu.kvm) &&
2473 kvm_run->request_interrupt_window &&
2474 !kvm_cpu_has_interrupt(&svm->vcpu)) {
2475 ++svm->vcpu.stat.irq_window_exits;
2476 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
2483 static int pause_interception(struct vcpu_svm *svm)
2485 kvm_vcpu_on_spin(&(svm->vcpu));
2489 static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = {
2490 [SVM_EXIT_READ_CR0] = emulate_on_interception,
2491 [SVM_EXIT_READ_CR3] = emulate_on_interception,
2492 [SVM_EXIT_READ_CR4] = emulate_on_interception,
2493 [SVM_EXIT_READ_CR8] = emulate_on_interception,
2494 [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception,
2495 [SVM_EXIT_WRITE_CR0] = emulate_on_interception,
2496 [SVM_EXIT_WRITE_CR3] = emulate_on_interception,
2497 [SVM_EXIT_WRITE_CR4] = emulate_on_interception,
2498 [SVM_EXIT_WRITE_CR8] = cr8_write_interception,
2499 [SVM_EXIT_READ_DR0] = emulate_on_interception,
2500 [SVM_EXIT_READ_DR1] = emulate_on_interception,
2501 [SVM_EXIT_READ_DR2] = emulate_on_interception,
2502 [SVM_EXIT_READ_DR3] = emulate_on_interception,
2503 [SVM_EXIT_READ_DR4] = emulate_on_interception,
2504 [SVM_EXIT_READ_DR5] = emulate_on_interception,
2505 [SVM_EXIT_READ_DR6] = emulate_on_interception,
2506 [SVM_EXIT_READ_DR7] = emulate_on_interception,
2507 [SVM_EXIT_WRITE_DR0] = emulate_on_interception,
2508 [SVM_EXIT_WRITE_DR1] = emulate_on_interception,
2509 [SVM_EXIT_WRITE_DR2] = emulate_on_interception,
2510 [SVM_EXIT_WRITE_DR3] = emulate_on_interception,
2511 [SVM_EXIT_WRITE_DR4] = emulate_on_interception,
2512 [SVM_EXIT_WRITE_DR5] = emulate_on_interception,
2513 [SVM_EXIT_WRITE_DR6] = emulate_on_interception,
2514 [SVM_EXIT_WRITE_DR7] = emulate_on_interception,
2515 [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception,
2516 [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception,
2517 [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception,
2518 [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception,
2519 [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception,
2520 [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception,
2521 [SVM_EXIT_INTR] = intr_interception,
2522 [SVM_EXIT_NMI] = nmi_interception,
2523 [SVM_EXIT_SMI] = nop_on_interception,
2524 [SVM_EXIT_INIT] = nop_on_interception,
2525 [SVM_EXIT_VINTR] = interrupt_window_interception,
2526 [SVM_EXIT_CPUID] = cpuid_interception,
2527 [SVM_EXIT_IRET] = iret_interception,
2528 [SVM_EXIT_INVD] = emulate_on_interception,
2529 [SVM_EXIT_PAUSE] = pause_interception,
2530 [SVM_EXIT_HLT] = halt_interception,
2531 [SVM_EXIT_INVLPG] = invlpg_interception,
2532 [SVM_EXIT_INVLPGA] = invlpga_interception,
2533 [SVM_EXIT_IOIO] = io_interception,
2534 [SVM_EXIT_MSR] = msr_interception,
2535 [SVM_EXIT_TASK_SWITCH] = task_switch_interception,
2536 [SVM_EXIT_SHUTDOWN] = shutdown_interception,
2537 [SVM_EXIT_VMRUN] = vmrun_interception,
2538 [SVM_EXIT_VMMCALL] = vmmcall_interception,
2539 [SVM_EXIT_VMLOAD] = vmload_interception,
2540 [SVM_EXIT_VMSAVE] = vmsave_interception,
2541 [SVM_EXIT_STGI] = stgi_interception,
2542 [SVM_EXIT_CLGI] = clgi_interception,
2543 [SVM_EXIT_SKINIT] = skinit_interception,
2544 [SVM_EXIT_WBINVD] = emulate_on_interception,
2545 [SVM_EXIT_MONITOR] = invalid_op_interception,
2546 [SVM_EXIT_MWAIT] = invalid_op_interception,
2547 [SVM_EXIT_NPF] = pf_interception,
2550 static int handle_exit(struct kvm_vcpu *vcpu)
2552 struct vcpu_svm *svm = to_svm(vcpu);
2553 struct kvm_run *kvm_run = vcpu->run;
2554 u32 exit_code = svm->vmcb->control.exit_code;
2556 trace_kvm_exit(exit_code, svm->vmcb->save.rip);
2558 if (unlikely(svm->nested.exit_required)) {
2559 nested_svm_vmexit(svm);
2560 svm->nested.exit_required = false;
2565 if (is_nested(svm)) {
2568 trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code,
2569 svm->vmcb->control.exit_info_1,
2570 svm->vmcb->control.exit_info_2,
2571 svm->vmcb->control.exit_int_info,
2572 svm->vmcb->control.exit_int_info_err);
2574 vmexit = nested_svm_exit_special(svm);
2576 if (vmexit == NESTED_EXIT_CONTINUE)
2577 vmexit = nested_svm_exit_handled(svm);
2579 if (vmexit == NESTED_EXIT_DONE)
2583 svm_complete_interrupts(svm);
2585 if (!(svm->vmcb->control.intercept_cr_write & INTERCEPT_CR0_MASK))
2586 vcpu->arch.cr0 = svm->vmcb->save.cr0;
2588 vcpu->arch.cr3 = svm->vmcb->save.cr3;
2590 if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
2591 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
2592 kvm_run->fail_entry.hardware_entry_failure_reason
2593 = svm->vmcb->control.exit_code;
2597 if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
2598 exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
2599 exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH)
2600 printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "
2602 __func__, svm->vmcb->control.exit_int_info,
2605 if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
2606 || !svm_exit_handlers[exit_code]) {
2607 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
2608 kvm_run->hw.hardware_exit_reason = exit_code;
2612 return svm_exit_handlers[exit_code](svm);
2615 static void reload_tss(struct kvm_vcpu *vcpu)
2617 int cpu = raw_smp_processor_id();
2619 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
2620 sd->tss_desc->type = 9; /* available 32/64-bit TSS */
2624 static void pre_svm_run(struct vcpu_svm *svm)
2626 int cpu = raw_smp_processor_id();
2628 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
2630 svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
2631 /* FIXME: handle wraparound of asid_generation */
2632 if (svm->asid_generation != sd->asid_generation)
2636 static void svm_inject_nmi(struct kvm_vcpu *vcpu)
2638 struct vcpu_svm *svm = to_svm(vcpu);
2640 svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI;
2641 vcpu->arch.hflags |= HF_NMI_MASK;
2642 svm->vmcb->control.intercept |= (1UL << INTERCEPT_IRET);
2643 ++vcpu->stat.nmi_injections;
2646 static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
2648 struct vmcb_control_area *control;
2650 trace_kvm_inj_virq(irq);
2652 ++svm->vcpu.stat.irq_injections;
2653 control = &svm->vmcb->control;
2654 control->int_vector = irq;
2655 control->int_ctl &= ~V_INTR_PRIO_MASK;
2656 control->int_ctl |= V_IRQ_MASK |
2657 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
2660 static void svm_set_irq(struct kvm_vcpu *vcpu)
2662 struct vcpu_svm *svm = to_svm(vcpu);
2664 BUG_ON(!(gif_set(svm)));
2666 svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
2667 SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
2670 static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
2672 struct vcpu_svm *svm = to_svm(vcpu);
2674 if (is_nested(svm) && (vcpu->arch.hflags & HF_VINTR_MASK))
2681 svm->vmcb->control.intercept_cr_write |= INTERCEPT_CR8_MASK;
2684 static int svm_nmi_allowed(struct kvm_vcpu *vcpu)
2686 struct vcpu_svm *svm = to_svm(vcpu);
2687 struct vmcb *vmcb = svm->vmcb;
2688 return !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
2689 !(svm->vcpu.arch.hflags & HF_NMI_MASK);
2692 static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu)
2694 struct vcpu_svm *svm = to_svm(vcpu);
2696 return !!(svm->vcpu.arch.hflags & HF_NMI_MASK);
2699 static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
2701 struct vcpu_svm *svm = to_svm(vcpu);
2704 svm->vcpu.arch.hflags |= HF_NMI_MASK;
2705 svm->vmcb->control.intercept |= (1UL << INTERCEPT_IRET);
2707 svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
2708 svm->vmcb->control.intercept &= ~(1UL << INTERCEPT_IRET);
2712 static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
2714 struct vcpu_svm *svm = to_svm(vcpu);
2715 struct vmcb *vmcb = svm->vmcb;
2718 if (!gif_set(svm) ||
2719 (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK))
2722 ret = !!(vmcb->save.rflags & X86_EFLAGS_IF);
2725 return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);
2730 static void enable_irq_window(struct kvm_vcpu *vcpu)
2732 struct vcpu_svm *svm = to_svm(vcpu);
2735 * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes
2736 * 1, because that's a separate STGI/VMRUN intercept. The next time we
2737 * get that intercept, this function will be called again though and
2738 * we'll get the vintr intercept.
2740 if (gif_set(svm) && nested_svm_intr(svm)) {
2742 svm_inject_irq(svm, 0x0);
2746 static void enable_nmi_window(struct kvm_vcpu *vcpu)
2748 struct vcpu_svm *svm = to_svm(vcpu);
2750 if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
2752 return; /* IRET will cause a vm exit */
2755 * Something prevents NMI from been injected. Single step over possible
2756 * problem (IRET or exception injection or interrupt shadow)
2758 if (gif_set(svm) && nested_svm_nmi(svm)) {
2759 svm->nmi_singlestep = true;
2760 svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
2761 update_db_intercept(vcpu);
2765 static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
2770 static void svm_flush_tlb(struct kvm_vcpu *vcpu)
2772 force_new_asid(vcpu);
2775 static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
2779 static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
2781 struct vcpu_svm *svm = to_svm(vcpu);
2783 if (is_nested(svm) && (vcpu->arch.hflags & HF_VINTR_MASK))
2786 if (!(svm->vmcb->control.intercept_cr_write & INTERCEPT_CR8_MASK)) {
2787 int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
2788 kvm_set_cr8(vcpu, cr8);
2792 static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
2794 struct vcpu_svm *svm = to_svm(vcpu);
2797 if (is_nested(svm) && (vcpu->arch.hflags & HF_VINTR_MASK))
2800 cr8 = kvm_get_cr8(vcpu);
2801 svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
2802 svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
2805 static void svm_complete_interrupts(struct vcpu_svm *svm)
2809 u32 exitintinfo = svm->vmcb->control.exit_int_info;
2810 unsigned int3_injected = svm->int3_injected;
2812 svm->int3_injected = 0;
2814 if (svm->vcpu.arch.hflags & HF_IRET_MASK)
2815 svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
2817 svm->vcpu.arch.nmi_injected = false;
2818 kvm_clear_exception_queue(&svm->vcpu);
2819 kvm_clear_interrupt_queue(&svm->vcpu);
2821 if (!(exitintinfo & SVM_EXITINTINFO_VALID))
2824 vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK;
2825 type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK;
2828 case SVM_EXITINTINFO_TYPE_NMI:
2829 svm->vcpu.arch.nmi_injected = true;
2831 case SVM_EXITINTINFO_TYPE_EXEPT:
2835 * In case of software exceptions, do not reinject the vector,
2836 * but re-execute the instruction instead. Rewind RIP first
2837 * if we emulated INT3 before.
2839 if (kvm_exception_is_soft(vector)) {
2840 if (vector == BP_VECTOR && int3_injected &&
2841 kvm_is_linear_rip(&svm->vcpu, svm->int3_rip))
2842 kvm_rip_write(&svm->vcpu,
2843 kvm_rip_read(&svm->vcpu) -
2847 if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
2848 u32 err = svm->vmcb->control.exit_int_info_err;
2849 kvm_queue_exception_e(&svm->vcpu, vector, err);
2852 kvm_queue_exception(&svm->vcpu, vector);
2854 case SVM_EXITINTINFO_TYPE_INTR:
2855 kvm_queue_interrupt(&svm->vcpu, vector, false);
2862 #ifdef CONFIG_X86_64
2868 static void svm_vcpu_run(struct kvm_vcpu *vcpu)
2870 struct vcpu_svm *svm = to_svm(vcpu);
2876 * A vmexit emulation is required before the vcpu can be executed
2879 if (unlikely(svm->nested.exit_required))
2882 svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
2883 svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
2884 svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];
2888 sync_lapic_to_cr8(vcpu);
2890 save_host_msrs(vcpu);
2891 fs_selector = kvm_read_fs();
2892 gs_selector = kvm_read_gs();
2893 ldt_selector = kvm_read_ldt();
2894 svm->vmcb->save.cr2 = vcpu->arch.cr2;
2895 /* required for live migration with NPT */
2897 svm->vmcb->save.cr3 = vcpu->arch.cr3;
2904 "push %%"R"bp; \n\t"
2905 "mov %c[rbx](%[svm]), %%"R"bx \n\t"
2906 "mov %c[rcx](%[svm]), %%"R"cx \n\t"
2907 "mov %c[rdx](%[svm]), %%"R"dx \n\t"
2908 "mov %c[rsi](%[svm]), %%"R"si \n\t"
2909 "mov %c[rdi](%[svm]), %%"R"di \n\t"
2910 "mov %c[rbp](%[svm]), %%"R"bp \n\t"
2911 #ifdef CONFIG_X86_64
2912 "mov %c[r8](%[svm]), %%r8 \n\t"
2913 "mov %c[r9](%[svm]), %%r9 \n\t"
2914 "mov %c[r10](%[svm]), %%r10 \n\t"
2915 "mov %c[r11](%[svm]), %%r11 \n\t"
2916 "mov %c[r12](%[svm]), %%r12 \n\t"
2917 "mov %c[r13](%[svm]), %%r13 \n\t"
2918 "mov %c[r14](%[svm]), %%r14 \n\t"
2919 "mov %c[r15](%[svm]), %%r15 \n\t"
2922 /* Enter guest mode */
2924 "mov %c[vmcb](%[svm]), %%"R"ax \n\t"
2925 __ex(SVM_VMLOAD) "\n\t"
2926 __ex(SVM_VMRUN) "\n\t"
2927 __ex(SVM_VMSAVE) "\n\t"
2930 /* Save guest registers, load host registers */
2931 "mov %%"R"bx, %c[rbx](%[svm]) \n\t"
2932 "mov %%"R"cx, %c[rcx](%[svm]) \n\t"
2933 "mov %%"R"dx, %c[rdx](%[svm]) \n\t"
2934 "mov %%"R"si, %c[rsi](%[svm]) \n\t"
2935 "mov %%"R"di, %c[rdi](%[svm]) \n\t"
2936 "mov %%"R"bp, %c[rbp](%[svm]) \n\t"
2937 #ifdef CONFIG_X86_64
2938 "mov %%r8, %c[r8](%[svm]) \n\t"
2939 "mov %%r9, %c[r9](%[svm]) \n\t"
2940 "mov %%r10, %c[r10](%[svm]) \n\t"
2941 "mov %%r11, %c[r11](%[svm]) \n\t"
2942 "mov %%r12, %c[r12](%[svm]) \n\t"
2943 "mov %%r13, %c[r13](%[svm]) \n\t"
2944 "mov %%r14, %c[r14](%[svm]) \n\t"
2945 "mov %%r15, %c[r15](%[svm]) \n\t"
2950 [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
2951 [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])),
2952 [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])),
2953 [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])),
2954 [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])),
2955 [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])),
2956 [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP]))
2957 #ifdef CONFIG_X86_64
2958 , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])),
2959 [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])),
2960 [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])),
2961 [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])),
2962 [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])),
2963 [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])),
2964 [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])),
2965 [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15]))
2968 , R"bx", R"cx", R"dx", R"si", R"di"
2969 #ifdef CONFIG_X86_64
2970 , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
2974 vcpu->arch.cr2 = svm->vmcb->save.cr2;
2975 vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
2976 vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
2977 vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
2979 kvm_load_fs(fs_selector);
2980 kvm_load_gs(gs_selector);
2981 kvm_load_ldt(ldt_selector);
2982 load_host_msrs(vcpu);
2986 local_irq_disable();
2990 sync_cr8_to_lapic(vcpu);
2995 vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
2996 vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
3002 static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
3004 struct vcpu_svm *svm = to_svm(vcpu);
3007 svm->vmcb->control.nested_cr3 = root;
3008 force_new_asid(vcpu);
3012 svm->vmcb->save.cr3 = root;
3013 force_new_asid(vcpu);
3016 static int is_disabled(void)
3020 rdmsrl(MSR_VM_CR, vm_cr);
3021 if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
3028 svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
3031 * Patch in the VMMCALL instruction:
3033 hypercall[0] = 0x0f;
3034 hypercall[1] = 0x01;
3035 hypercall[2] = 0xd9;
3038 static void svm_check_processor_compat(void *rtn)
3043 static bool svm_cpu_has_accelerated_tpr(void)
3048 static int get_npt_level(void)
3050 #ifdef CONFIG_X86_64
3051 return PT64_ROOT_LEVEL;
3053 return PT32E_ROOT_LEVEL;
3057 static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
3062 static void svm_cpuid_update(struct kvm_vcpu *vcpu)
3066 static const struct trace_print_flags svm_exit_reasons_str[] = {
3067 { SVM_EXIT_READ_CR0, "read_cr0" },
3068 { SVM_EXIT_READ_CR3, "read_cr3" },
3069 { SVM_EXIT_READ_CR4, "read_cr4" },
3070 { SVM_EXIT_READ_CR8, "read_cr8" },
3071 { SVM_EXIT_WRITE_CR0, "write_cr0" },
3072 { SVM_EXIT_WRITE_CR3, "write_cr3" },
3073 { SVM_EXIT_WRITE_CR4, "write_cr4" },
3074 { SVM_EXIT_WRITE_CR8, "write_cr8" },
3075 { SVM_EXIT_READ_DR0, "read_dr0" },
3076 { SVM_EXIT_READ_DR1, "read_dr1" },
3077 { SVM_EXIT_READ_DR2, "read_dr2" },
3078 { SVM_EXIT_READ_DR3, "read_dr3" },
3079 { SVM_EXIT_WRITE_DR0, "write_dr0" },
3080 { SVM_EXIT_WRITE_DR1, "write_dr1" },
3081 { SVM_EXIT_WRITE_DR2, "write_dr2" },
3082 { SVM_EXIT_WRITE_DR3, "write_dr3" },
3083 { SVM_EXIT_WRITE_DR5, "write_dr5" },
3084 { SVM_EXIT_WRITE_DR7, "write_dr7" },
3085 { SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" },
3086 { SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" },
3087 { SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" },
3088 { SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" },
3089 { SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" },
3090 { SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" },
3091 { SVM_EXIT_INTR, "interrupt" },
3092 { SVM_EXIT_NMI, "nmi" },
3093 { SVM_EXIT_SMI, "smi" },
3094 { SVM_EXIT_INIT, "init" },
3095 { SVM_EXIT_VINTR, "vintr" },
3096 { SVM_EXIT_CPUID, "cpuid" },
3097 { SVM_EXIT_INVD, "invd" },
3098 { SVM_EXIT_HLT, "hlt" },
3099 { SVM_EXIT_INVLPG, "invlpg" },
3100 { SVM_EXIT_INVLPGA, "invlpga" },
3101 { SVM_EXIT_IOIO, "io" },
3102 { SVM_EXIT_MSR, "msr" },
3103 { SVM_EXIT_TASK_SWITCH, "task_switch" },
3104 { SVM_EXIT_SHUTDOWN, "shutdown" },
3105 { SVM_EXIT_VMRUN, "vmrun" },
3106 { SVM_EXIT_VMMCALL, "hypercall" },
3107 { SVM_EXIT_VMLOAD, "vmload" },
3108 { SVM_EXIT_VMSAVE, "vmsave" },
3109 { SVM_EXIT_STGI, "stgi" },
3110 { SVM_EXIT_CLGI, "clgi" },
3111 { SVM_EXIT_SKINIT, "skinit" },
3112 { SVM_EXIT_WBINVD, "wbinvd" },
3113 { SVM_EXIT_MONITOR, "monitor" },
3114 { SVM_EXIT_MWAIT, "mwait" },
3115 { SVM_EXIT_NPF, "npf" },
3119 static int svm_get_lpage_level(void)
3121 return PT_PDPE_LEVEL;
3124 static bool svm_rdtscp_supported(void)
3129 static void svm_fpu_deactivate(struct kvm_vcpu *vcpu)
3131 struct vcpu_svm *svm = to_svm(vcpu);
3133 svm->vmcb->control.intercept_exceptions |= 1 << NM_VECTOR;
3135 svm->nested.hsave->control.intercept_exceptions |= 1 << NM_VECTOR;
3136 update_cr0_intercept(svm);
3139 static struct kvm_x86_ops svm_x86_ops = {
3140 .cpu_has_kvm_support = has_svm,
3141 .disabled_by_bios = is_disabled,
3142 .hardware_setup = svm_hardware_setup,
3143 .hardware_unsetup = svm_hardware_unsetup,
3144 .check_processor_compatibility = svm_check_processor_compat,
3145 .hardware_enable = svm_hardware_enable,
3146 .hardware_disable = svm_hardware_disable,
3147 .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
3149 .vcpu_create = svm_create_vcpu,
3150 .vcpu_free = svm_free_vcpu,
3151 .vcpu_reset = svm_vcpu_reset,
3153 .prepare_guest_switch = svm_prepare_guest_switch,
3154 .vcpu_load = svm_vcpu_load,
3155 .vcpu_put = svm_vcpu_put,
3157 .set_guest_debug = svm_guest_debug,
3158 .get_msr = svm_get_msr,
3159 .set_msr = svm_set_msr,
3160 .get_segment_base = svm_get_segment_base,
3161 .get_segment = svm_get_segment,
3162 .set_segment = svm_set_segment,
3163 .get_cpl = svm_get_cpl,
3164 .get_cs_db_l_bits = kvm_get_cs_db_l_bits,
3165 .decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
3166 .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
3167 .set_cr0 = svm_set_cr0,
3168 .set_cr3 = svm_set_cr3,
3169 .set_cr4 = svm_set_cr4,
3170 .set_efer = svm_set_efer,
3171 .get_idt = svm_get_idt,
3172 .set_idt = svm_set_idt,
3173 .get_gdt = svm_get_gdt,
3174 .set_gdt = svm_set_gdt,
3175 .get_dr = svm_get_dr,
3176 .set_dr = svm_set_dr,
3177 .cache_reg = svm_cache_reg,
3178 .get_rflags = svm_get_rflags,
3179 .set_rflags = svm_set_rflags,
3180 .fpu_activate = svm_fpu_activate,
3181 .fpu_deactivate = svm_fpu_deactivate,
3183 .tlb_flush = svm_flush_tlb,
3185 .run = svm_vcpu_run,
3186 .handle_exit = handle_exit,
3187 .skip_emulated_instruction = skip_emulated_instruction,
3188 .set_interrupt_shadow = svm_set_interrupt_shadow,
3189 .get_interrupt_shadow = svm_get_interrupt_shadow,
3190 .patch_hypercall = svm_patch_hypercall,
3191 .set_irq = svm_set_irq,
3192 .set_nmi = svm_inject_nmi,
3193 .queue_exception = svm_queue_exception,
3194 .interrupt_allowed = svm_interrupt_allowed,
3195 .nmi_allowed = svm_nmi_allowed,
3196 .get_nmi_mask = svm_get_nmi_mask,
3197 .set_nmi_mask = svm_set_nmi_mask,
3198 .enable_nmi_window = enable_nmi_window,
3199 .enable_irq_window = enable_irq_window,
3200 .update_cr8_intercept = update_cr8_intercept,
3202 .set_tss_addr = svm_set_tss_addr,
3203 .get_tdp_level = get_npt_level,
3204 .get_mt_mask = svm_get_mt_mask,
3206 .exit_reasons_str = svm_exit_reasons_str,
3207 .get_lpage_level = svm_get_lpage_level,
3209 .cpuid_update = svm_cpuid_update,
3211 .rdtscp_supported = svm_rdtscp_supported,
3214 static int __init svm_init(void)
3216 return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
3220 static void __exit svm_exit(void)
3225 module_init(svm_init)
3226 module_exit(svm_exit)