1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/frame.h>
4 #include <linux/percpu.h>
6 #include <asm/debugreg.h>
7 #include <asm/mmu_context.h>
16 static bool __read_mostly enable_shadow_vmcs = 1;
17 module_param_named(enable_shadow_vmcs, enable_shadow_vmcs, bool, S_IRUGO);
19 static bool __read_mostly nested_early_check = 0;
20 module_param(nested_early_check, bool, S_IRUGO);
23 * Hyper-V requires all of these, so mark them as supported even though
24 * they are just treated the same as all-context.
26 #define VMX_VPID_EXTENT_SUPPORTED_MASK \
27 (VMX_VPID_EXTENT_INDIVIDUAL_ADDR_BIT | \
28 VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT | \
29 VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT | \
30 VMX_VPID_EXTENT_SINGLE_NON_GLOBAL_BIT)
32 #define VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE 5
39 static unsigned long *vmx_bitmap[VMX_BITMAP_NR];
41 #define vmx_vmread_bitmap (vmx_bitmap[VMX_VMREAD_BITMAP])
42 #define vmx_vmwrite_bitmap (vmx_bitmap[VMX_VMWRITE_BITMAP])
44 static u16 shadow_read_only_fields[] = {
45 #define SHADOW_FIELD_RO(x) x,
46 #include "vmcs_shadow_fields.h"
48 static int max_shadow_read_only_fields =
49 ARRAY_SIZE(shadow_read_only_fields);
51 static u16 shadow_read_write_fields[] = {
52 #define SHADOW_FIELD_RW(x) x,
53 #include "vmcs_shadow_fields.h"
55 static int max_shadow_read_write_fields =
56 ARRAY_SIZE(shadow_read_write_fields);
58 static void init_vmcs_shadow_fields(void)
62 memset(vmx_vmread_bitmap, 0xff, PAGE_SIZE);
63 memset(vmx_vmwrite_bitmap, 0xff, PAGE_SIZE);
65 for (i = j = 0; i < max_shadow_read_only_fields; i++) {
66 u16 field = shadow_read_only_fields[i];
68 if (vmcs_field_width(field) == VMCS_FIELD_WIDTH_U64 &&
69 (i + 1 == max_shadow_read_only_fields ||
70 shadow_read_only_fields[i + 1] != field + 1))
71 pr_err("Missing field from shadow_read_only_field %x\n",
74 clear_bit(field, vmx_vmread_bitmap);
80 shadow_read_only_fields[j] = field;
83 max_shadow_read_only_fields = j;
85 for (i = j = 0; i < max_shadow_read_write_fields; i++) {
86 u16 field = shadow_read_write_fields[i];
88 if (vmcs_field_width(field) == VMCS_FIELD_WIDTH_U64 &&
89 (i + 1 == max_shadow_read_write_fields ||
90 shadow_read_write_fields[i + 1] != field + 1))
91 pr_err("Missing field from shadow_read_write_field %x\n",
95 * PML and the preemption timer can be emulated, but the
96 * processor cannot vmwrite to fields that don't exist
100 case GUEST_PML_INDEX:
101 if (!cpu_has_vmx_pml())
104 case VMX_PREEMPTION_TIMER_VALUE:
105 if (!cpu_has_vmx_preemption_timer())
108 case GUEST_INTR_STATUS:
109 if (!cpu_has_vmx_apicv())
116 clear_bit(field, vmx_vmwrite_bitmap);
117 clear_bit(field, vmx_vmread_bitmap);
123 shadow_read_write_fields[j] = field;
126 max_shadow_read_write_fields = j;
130 * The following 3 functions, nested_vmx_succeed()/failValid()/failInvalid(),
131 * set the success or error code of an emulated VMX instruction (as specified
132 * by Vol 2B, VMX Instruction Reference, "Conventions"), and skip the emulated
135 static int nested_vmx_succeed(struct kvm_vcpu *vcpu)
137 vmx_set_rflags(vcpu, vmx_get_rflags(vcpu)
138 & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
139 X86_EFLAGS_ZF | X86_EFLAGS_SF | X86_EFLAGS_OF));
140 return kvm_skip_emulated_instruction(vcpu);
143 static int nested_vmx_failInvalid(struct kvm_vcpu *vcpu)
145 vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
146 & ~(X86_EFLAGS_PF | X86_EFLAGS_AF | X86_EFLAGS_ZF |
147 X86_EFLAGS_SF | X86_EFLAGS_OF))
149 return kvm_skip_emulated_instruction(vcpu);
152 static int nested_vmx_failValid(struct kvm_vcpu *vcpu,
153 u32 vm_instruction_error)
155 struct vcpu_vmx *vmx = to_vmx(vcpu);
158 * failValid writes the error number to the current VMCS, which
159 * can't be done if there isn't a current VMCS.
161 if (vmx->nested.current_vmptr == -1ull && !vmx->nested.hv_evmcs)
162 return nested_vmx_failInvalid(vcpu);
164 vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
165 & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
166 X86_EFLAGS_SF | X86_EFLAGS_OF))
168 get_vmcs12(vcpu)->vm_instruction_error = vm_instruction_error;
170 * We don't need to force a shadow sync because
171 * VM_INSTRUCTION_ERROR is not shadowed
173 return kvm_skip_emulated_instruction(vcpu);
176 static void nested_vmx_abort(struct kvm_vcpu *vcpu, u32 indicator)
178 /* TODO: not to reset guest simply here. */
179 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
180 pr_debug_ratelimited("kvm: nested vmx abort, indicator %d\n", indicator);
183 static void vmx_disable_shadow_vmcs(struct vcpu_vmx *vmx)
185 vmcs_clear_bits(SECONDARY_VM_EXEC_CONTROL, SECONDARY_EXEC_SHADOW_VMCS);
186 vmcs_write64(VMCS_LINK_POINTER, -1ull);
189 static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
191 struct vcpu_vmx *vmx = to_vmx(vcpu);
193 if (!vmx->nested.hv_evmcs)
196 kunmap(vmx->nested.hv_evmcs_page);
197 kvm_release_page_dirty(vmx->nested.hv_evmcs_page);
198 vmx->nested.hv_evmcs_vmptr = -1ull;
199 vmx->nested.hv_evmcs_page = NULL;
200 vmx->nested.hv_evmcs = NULL;
204 * Free whatever needs to be freed from vmx->nested when L1 goes down, or
205 * just stops using VMX.
207 static void free_nested(struct kvm_vcpu *vcpu)
209 struct vcpu_vmx *vmx = to_vmx(vcpu);
211 if (!vmx->nested.vmxon && !vmx->nested.smm.vmxon)
214 vmx->nested.vmxon = false;
215 vmx->nested.smm.vmxon = false;
216 free_vpid(vmx->nested.vpid02);
217 vmx->nested.posted_intr_nv = -1;
218 vmx->nested.current_vmptr = -1ull;
219 if (enable_shadow_vmcs) {
220 vmx_disable_shadow_vmcs(vmx);
221 vmcs_clear(vmx->vmcs01.shadow_vmcs);
222 free_vmcs(vmx->vmcs01.shadow_vmcs);
223 vmx->vmcs01.shadow_vmcs = NULL;
225 kfree(vmx->nested.cached_vmcs12);
226 kfree(vmx->nested.cached_shadow_vmcs12);
227 /* Unpin physical memory we referred to in the vmcs02 */
228 if (vmx->nested.apic_access_page) {
229 kvm_release_page_dirty(vmx->nested.apic_access_page);
230 vmx->nested.apic_access_page = NULL;
232 if (vmx->nested.virtual_apic_page) {
233 kvm_release_page_dirty(vmx->nested.virtual_apic_page);
234 vmx->nested.virtual_apic_page = NULL;
236 if (vmx->nested.pi_desc_page) {
237 kunmap(vmx->nested.pi_desc_page);
238 kvm_release_page_dirty(vmx->nested.pi_desc_page);
239 vmx->nested.pi_desc_page = NULL;
240 vmx->nested.pi_desc = NULL;
243 kvm_mmu_free_roots(vcpu, &vcpu->arch.guest_mmu, KVM_MMU_ROOTS_ALL);
245 nested_release_evmcs(vcpu);
247 free_loaded_vmcs(&vmx->nested.vmcs02);
250 static void vmx_switch_vmcs(struct kvm_vcpu *vcpu, struct loaded_vmcs *vmcs)
252 struct vcpu_vmx *vmx = to_vmx(vcpu);
255 if (vmx->loaded_vmcs == vmcs)
260 vmx->loaded_vmcs = vmcs;
261 vmx_vcpu_load(vcpu, cpu);
264 vm_entry_controls_reset_shadow(vmx);
265 vm_exit_controls_reset_shadow(vmx);
266 vmx_segment_cache_clear(vmx);
270 * Ensure that the current vmcs of the logical processor is the
271 * vmcs01 of the vcpu before calling free_nested().
273 void nested_vmx_free_vcpu(struct kvm_vcpu *vcpu)
276 vmx_leave_nested(vcpu);
277 vmx_switch_vmcs(vcpu, &to_vmx(vcpu)->vmcs01);
282 static void nested_ept_inject_page_fault(struct kvm_vcpu *vcpu,
283 struct x86_exception *fault)
285 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
286 struct vcpu_vmx *vmx = to_vmx(vcpu);
288 unsigned long exit_qualification = vcpu->arch.exit_qualification;
290 if (vmx->nested.pml_full) {
291 exit_reason = EXIT_REASON_PML_FULL;
292 vmx->nested.pml_full = false;
293 exit_qualification &= INTR_INFO_UNBLOCK_NMI;
294 } else if (fault->error_code & PFERR_RSVD_MASK)
295 exit_reason = EXIT_REASON_EPT_MISCONFIG;
297 exit_reason = EXIT_REASON_EPT_VIOLATION;
299 nested_vmx_vmexit(vcpu, exit_reason, 0, exit_qualification);
300 vmcs12->guest_physical_address = fault->address;
303 static void nested_ept_init_mmu_context(struct kvm_vcpu *vcpu)
305 WARN_ON(mmu_is_nested(vcpu));
307 vcpu->arch.mmu = &vcpu->arch.guest_mmu;
308 kvm_init_shadow_ept_mmu(vcpu,
309 to_vmx(vcpu)->nested.msrs.ept_caps &
310 VMX_EPT_EXECUTE_ONLY_BIT,
311 nested_ept_ad_enabled(vcpu),
312 nested_ept_get_cr3(vcpu));
313 vcpu->arch.mmu->set_cr3 = vmx_set_cr3;
314 vcpu->arch.mmu->get_cr3 = nested_ept_get_cr3;
315 vcpu->arch.mmu->inject_page_fault = nested_ept_inject_page_fault;
316 vcpu->arch.mmu->get_pdptr = kvm_pdptr_read;
318 vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu;
321 static void nested_ept_uninit_mmu_context(struct kvm_vcpu *vcpu)
323 vcpu->arch.mmu = &vcpu->arch.root_mmu;
324 vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;
327 static bool nested_vmx_is_page_fault_vmexit(struct vmcs12 *vmcs12,
330 bool inequality, bit;
332 bit = (vmcs12->exception_bitmap & (1u << PF_VECTOR)) != 0;
334 (error_code & vmcs12->page_fault_error_code_mask) !=
335 vmcs12->page_fault_error_code_match;
336 return inequality ^ bit;
341 * KVM wants to inject page-faults which it got to the guest. This function
342 * checks whether in a nested guest, we need to inject them to L1 or L2.
344 static int nested_vmx_check_exception(struct kvm_vcpu *vcpu, unsigned long *exit_qual)
346 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
347 unsigned int nr = vcpu->arch.exception.nr;
348 bool has_payload = vcpu->arch.exception.has_payload;
349 unsigned long payload = vcpu->arch.exception.payload;
351 if (nr == PF_VECTOR) {
352 if (vcpu->arch.exception.nested_apf) {
353 *exit_qual = vcpu->arch.apf.nested_apf_token;
356 if (nested_vmx_is_page_fault_vmexit(vmcs12,
357 vcpu->arch.exception.error_code)) {
358 *exit_qual = has_payload ? payload : vcpu->arch.cr2;
361 } else if (vmcs12->exception_bitmap & (1u << nr)) {
362 if (nr == DB_VECTOR) {
364 payload = vcpu->arch.dr6;
365 payload &= ~(DR6_FIXED_1 | DR6_BT);
368 *exit_qual = payload;
378 static void vmx_inject_page_fault_nested(struct kvm_vcpu *vcpu,
379 struct x86_exception *fault)
381 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
383 WARN_ON(!is_guest_mode(vcpu));
385 if (nested_vmx_is_page_fault_vmexit(vmcs12, fault->error_code) &&
386 !to_vmx(vcpu)->nested.nested_run_pending) {
387 vmcs12->vm_exit_intr_error_code = fault->error_code;
388 nested_vmx_vmexit(vcpu, EXIT_REASON_EXCEPTION_NMI,
389 PF_VECTOR | INTR_TYPE_HARD_EXCEPTION |
390 INTR_INFO_DELIVER_CODE_MASK | INTR_INFO_VALID_MASK,
393 kvm_inject_page_fault(vcpu, fault);
397 static bool page_address_valid(struct kvm_vcpu *vcpu, gpa_t gpa)
399 return PAGE_ALIGNED(gpa) && !(gpa >> cpuid_maxphyaddr(vcpu));
402 static int nested_vmx_check_io_bitmap_controls(struct kvm_vcpu *vcpu,
403 struct vmcs12 *vmcs12)
405 if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS))
408 if (!page_address_valid(vcpu, vmcs12->io_bitmap_a) ||
409 !page_address_valid(vcpu, vmcs12->io_bitmap_b))
415 static int nested_vmx_check_msr_bitmap_controls(struct kvm_vcpu *vcpu,
416 struct vmcs12 *vmcs12)
418 if (!nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS))
421 if (!page_address_valid(vcpu, vmcs12->msr_bitmap))
427 static int nested_vmx_check_tpr_shadow_controls(struct kvm_vcpu *vcpu,
428 struct vmcs12 *vmcs12)
430 if (!nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW))
433 if (!page_address_valid(vcpu, vmcs12->virtual_apic_page_addr))
440 * Check if MSR is intercepted for L01 MSR bitmap.
442 static bool msr_write_intercepted_l01(struct kvm_vcpu *vcpu, u32 msr)
444 unsigned long *msr_bitmap;
445 int f = sizeof(unsigned long);
447 if (!cpu_has_vmx_msr_bitmap())
450 msr_bitmap = to_vmx(vcpu)->vmcs01.msr_bitmap;
453 return !!test_bit(msr, msr_bitmap + 0x800 / f);
454 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
456 return !!test_bit(msr, msr_bitmap + 0xc00 / f);
463 * If a msr is allowed by L0, we should check whether it is allowed by L1.
464 * The corresponding bit will be cleared unless both of L0 and L1 allow it.
466 static void nested_vmx_disable_intercept_for_msr(unsigned long *msr_bitmap_l1,
467 unsigned long *msr_bitmap_nested,
470 int f = sizeof(unsigned long);
473 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
474 * have the write-low and read-high bitmap offsets the wrong way round.
475 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
478 if (type & MSR_TYPE_R &&
479 !test_bit(msr, msr_bitmap_l1 + 0x000 / f))
481 __clear_bit(msr, msr_bitmap_nested + 0x000 / f);
483 if (type & MSR_TYPE_W &&
484 !test_bit(msr, msr_bitmap_l1 + 0x800 / f))
486 __clear_bit(msr, msr_bitmap_nested + 0x800 / f);
488 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
490 if (type & MSR_TYPE_R &&
491 !test_bit(msr, msr_bitmap_l1 + 0x400 / f))
493 __clear_bit(msr, msr_bitmap_nested + 0x400 / f);
495 if (type & MSR_TYPE_W &&
496 !test_bit(msr, msr_bitmap_l1 + 0xc00 / f))
498 __clear_bit(msr, msr_bitmap_nested + 0xc00 / f);
503 static inline void enable_x2apic_msr_intercepts(unsigned long *msr_bitmap) {
506 for (msr = 0x800; msr <= 0x8ff; msr += BITS_PER_LONG) {
507 unsigned word = msr / BITS_PER_LONG;
509 msr_bitmap[word] = ~0;
510 msr_bitmap[word + (0x800 / sizeof(long))] = ~0;
515 * Merge L0's and L1's MSR bitmap, return false to indicate that
516 * we do not use the hardware.
518 static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu,
519 struct vmcs12 *vmcs12)
523 unsigned long *msr_bitmap_l1;
524 unsigned long *msr_bitmap_l0 = to_vmx(vcpu)->nested.vmcs02.msr_bitmap;
526 * pred_cmd & spec_ctrl are trying to verify two things:
528 * 1. L0 gave a permission to L1 to actually passthrough the MSR. This
529 * ensures that we do not accidentally generate an L02 MSR bitmap
530 * from the L12 MSR bitmap that is too permissive.
531 * 2. That L1 or L2s have actually used the MSR. This avoids
532 * unnecessarily merging of the bitmap if the MSR is unused. This
533 * works properly because we only update the L01 MSR bitmap lazily.
534 * So even if L0 should pass L1 these MSRs, the L01 bitmap is only
535 * updated to reflect this when L1 (or its L2s) actually write to
538 bool pred_cmd = !msr_write_intercepted_l01(vcpu, MSR_IA32_PRED_CMD);
539 bool spec_ctrl = !msr_write_intercepted_l01(vcpu, MSR_IA32_SPEC_CTRL);
541 /* Nothing to do if the MSR bitmap is not in use. */
542 if (!cpu_has_vmx_msr_bitmap() ||
543 !nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS))
546 if (!nested_cpu_has_virt_x2apic_mode(vmcs12) &&
547 !pred_cmd && !spec_ctrl)
550 page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->msr_bitmap);
551 if (is_error_page(page))
554 msr_bitmap_l1 = (unsigned long *)kmap(page);
557 * To keep the control flow simple, pay eight 8-byte writes (sixteen
558 * 4-byte writes on 32-bit systems) up front to enable intercepts for
559 * the x2APIC MSR range and selectively disable them below.
561 enable_x2apic_msr_intercepts(msr_bitmap_l0);
563 if (nested_cpu_has_virt_x2apic_mode(vmcs12)) {
564 if (nested_cpu_has_apic_reg_virt(vmcs12)) {
566 * L0 need not intercept reads for MSRs between 0x800
567 * and 0x8ff, it just lets the processor take the value
568 * from the virtual-APIC page; take those 256 bits
569 * directly from the L1 bitmap.
571 for (msr = 0x800; msr <= 0x8ff; msr += BITS_PER_LONG) {
572 unsigned word = msr / BITS_PER_LONG;
574 msr_bitmap_l0[word] = msr_bitmap_l1[word];
578 nested_vmx_disable_intercept_for_msr(
579 msr_bitmap_l1, msr_bitmap_l0,
580 X2APIC_MSR(APIC_TASKPRI),
581 MSR_TYPE_R | MSR_TYPE_W);
583 if (nested_cpu_has_vid(vmcs12)) {
584 nested_vmx_disable_intercept_for_msr(
585 msr_bitmap_l1, msr_bitmap_l0,
586 X2APIC_MSR(APIC_EOI),
588 nested_vmx_disable_intercept_for_msr(
589 msr_bitmap_l1, msr_bitmap_l0,
590 X2APIC_MSR(APIC_SELF_IPI),
596 nested_vmx_disable_intercept_for_msr(
597 msr_bitmap_l1, msr_bitmap_l0,
599 MSR_TYPE_R | MSR_TYPE_W);
602 nested_vmx_disable_intercept_for_msr(
603 msr_bitmap_l1, msr_bitmap_l0,
608 kvm_release_page_clean(page);
613 static void nested_cache_shadow_vmcs12(struct kvm_vcpu *vcpu,
614 struct vmcs12 *vmcs12)
616 struct vmcs12 *shadow;
619 if (!nested_cpu_has_shadow_vmcs(vmcs12) ||
620 vmcs12->vmcs_link_pointer == -1ull)
623 shadow = get_shadow_vmcs12(vcpu);
624 page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->vmcs_link_pointer);
626 memcpy(shadow, kmap(page), VMCS12_SIZE);
629 kvm_release_page_clean(page);
632 static void nested_flush_cached_shadow_vmcs12(struct kvm_vcpu *vcpu,
633 struct vmcs12 *vmcs12)
635 struct vcpu_vmx *vmx = to_vmx(vcpu);
637 if (!nested_cpu_has_shadow_vmcs(vmcs12) ||
638 vmcs12->vmcs_link_pointer == -1ull)
641 kvm_write_guest(vmx->vcpu.kvm, vmcs12->vmcs_link_pointer,
642 get_shadow_vmcs12(vcpu), VMCS12_SIZE);
646 * In nested virtualization, check if L1 has set
647 * VM_EXIT_ACK_INTR_ON_EXIT
649 static bool nested_exit_intr_ack_set(struct kvm_vcpu *vcpu)
651 return get_vmcs12(vcpu)->vm_exit_controls &
652 VM_EXIT_ACK_INTR_ON_EXIT;
655 static bool nested_exit_on_nmi(struct kvm_vcpu *vcpu)
657 return nested_cpu_has_nmi_exiting(get_vmcs12(vcpu));
660 static int nested_vmx_check_apic_access_controls(struct kvm_vcpu *vcpu,
661 struct vmcs12 *vmcs12)
663 if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) &&
664 !page_address_valid(vcpu, vmcs12->apic_access_addr))
670 static int nested_vmx_check_apicv_controls(struct kvm_vcpu *vcpu,
671 struct vmcs12 *vmcs12)
673 if (!nested_cpu_has_virt_x2apic_mode(vmcs12) &&
674 !nested_cpu_has_apic_reg_virt(vmcs12) &&
675 !nested_cpu_has_vid(vmcs12) &&
676 !nested_cpu_has_posted_intr(vmcs12))
680 * If virtualize x2apic mode is enabled,
681 * virtualize apic access must be disabled.
683 if (nested_cpu_has_virt_x2apic_mode(vmcs12) &&
684 nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
688 * If virtual interrupt delivery is enabled,
689 * we must exit on external interrupts.
691 if (nested_cpu_has_vid(vmcs12) &&
692 !nested_exit_on_intr(vcpu))
696 * bits 15:8 should be zero in posted_intr_nv,
697 * the descriptor address has been already checked
698 * in nested_get_vmcs12_pages.
700 * bits 5:0 of posted_intr_desc_addr should be zero.
702 if (nested_cpu_has_posted_intr(vmcs12) &&
703 (!nested_cpu_has_vid(vmcs12) ||
704 !nested_exit_intr_ack_set(vcpu) ||
705 (vmcs12->posted_intr_nv & 0xff00) ||
706 (vmcs12->posted_intr_desc_addr & 0x3f) ||
707 (vmcs12->posted_intr_desc_addr >> cpuid_maxphyaddr(vcpu))))
710 /* tpr shadow is needed by all apicv features. */
711 if (!nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW))
717 static int nested_vmx_check_msr_switch(struct kvm_vcpu *vcpu,
724 maxphyaddr = cpuid_maxphyaddr(vcpu);
725 if (!IS_ALIGNED(addr, 16) || addr >> maxphyaddr ||
726 (addr + count * sizeof(struct vmx_msr_entry) - 1) >> maxphyaddr)
732 static int nested_vmx_check_exit_msr_switch_controls(struct kvm_vcpu *vcpu,
733 struct vmcs12 *vmcs12)
735 if (nested_vmx_check_msr_switch(vcpu, vmcs12->vm_exit_msr_load_count,
736 vmcs12->vm_exit_msr_load_addr) ||
737 nested_vmx_check_msr_switch(vcpu, vmcs12->vm_exit_msr_store_count,
738 vmcs12->vm_exit_msr_store_addr))
744 static int nested_vmx_check_entry_msr_switch_controls(struct kvm_vcpu *vcpu,
745 struct vmcs12 *vmcs12)
747 if (nested_vmx_check_msr_switch(vcpu, vmcs12->vm_entry_msr_load_count,
748 vmcs12->vm_entry_msr_load_addr))
754 static int nested_vmx_check_pml_controls(struct kvm_vcpu *vcpu,
755 struct vmcs12 *vmcs12)
757 if (!nested_cpu_has_pml(vmcs12))
760 if (!nested_cpu_has_ept(vmcs12) ||
761 !page_address_valid(vcpu, vmcs12->pml_address))
767 static int nested_vmx_check_unrestricted_guest_controls(struct kvm_vcpu *vcpu,
768 struct vmcs12 *vmcs12)
770 if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_UNRESTRICTED_GUEST) &&
771 !nested_cpu_has_ept(vmcs12))
776 static int nested_vmx_check_mode_based_ept_exec_controls(struct kvm_vcpu *vcpu,
777 struct vmcs12 *vmcs12)
779 if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_MODE_BASED_EPT_EXEC) &&
780 !nested_cpu_has_ept(vmcs12))
785 static int nested_vmx_check_shadow_vmcs_controls(struct kvm_vcpu *vcpu,
786 struct vmcs12 *vmcs12)
788 if (!nested_cpu_has_shadow_vmcs(vmcs12))
791 if (!page_address_valid(vcpu, vmcs12->vmread_bitmap) ||
792 !page_address_valid(vcpu, vmcs12->vmwrite_bitmap))
798 static int nested_vmx_msr_check_common(struct kvm_vcpu *vcpu,
799 struct vmx_msr_entry *e)
801 /* x2APIC MSR accesses are not allowed */
802 if (vcpu->arch.apic_base & X2APIC_ENABLE && e->index >> 8 == 0x8)
804 if (e->index == MSR_IA32_UCODE_WRITE || /* SDM Table 35-2 */
805 e->index == MSR_IA32_UCODE_REV)
807 if (e->reserved != 0)
812 static int nested_vmx_load_msr_check(struct kvm_vcpu *vcpu,
813 struct vmx_msr_entry *e)
815 if (e->index == MSR_FS_BASE ||
816 e->index == MSR_GS_BASE ||
817 e->index == MSR_IA32_SMM_MONITOR_CTL || /* SMM is not supported */
818 nested_vmx_msr_check_common(vcpu, e))
823 static int nested_vmx_store_msr_check(struct kvm_vcpu *vcpu,
824 struct vmx_msr_entry *e)
826 if (e->index == MSR_IA32_SMBASE || /* SMM is not supported */
827 nested_vmx_msr_check_common(vcpu, e))
833 * Load guest's/host's msr at nested entry/exit.
834 * return 0 for success, entry index for failure.
836 static u32 nested_vmx_load_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count)
839 struct vmx_msr_entry e;
842 msr.host_initiated = false;
843 for (i = 0; i < count; i++) {
844 if (kvm_vcpu_read_guest(vcpu, gpa + i * sizeof(e),
846 pr_debug_ratelimited(
847 "%s cannot read MSR entry (%u, 0x%08llx)\n",
848 __func__, i, gpa + i * sizeof(e));
851 if (nested_vmx_load_msr_check(vcpu, &e)) {
852 pr_debug_ratelimited(
853 "%s check failed (%u, 0x%x, 0x%x)\n",
854 __func__, i, e.index, e.reserved);
859 if (kvm_set_msr(vcpu, &msr)) {
860 pr_debug_ratelimited(
861 "%s cannot write MSR (%u, 0x%x, 0x%llx)\n",
862 __func__, i, e.index, e.value);
871 static int nested_vmx_store_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count)
874 struct vmx_msr_entry e;
876 for (i = 0; i < count; i++) {
877 struct msr_data msr_info;
878 if (kvm_vcpu_read_guest(vcpu,
880 &e, 2 * sizeof(u32))) {
881 pr_debug_ratelimited(
882 "%s cannot read MSR entry (%u, 0x%08llx)\n",
883 __func__, i, gpa + i * sizeof(e));
886 if (nested_vmx_store_msr_check(vcpu, &e)) {
887 pr_debug_ratelimited(
888 "%s check failed (%u, 0x%x, 0x%x)\n",
889 __func__, i, e.index, e.reserved);
892 msr_info.host_initiated = false;
893 msr_info.index = e.index;
894 if (kvm_get_msr(vcpu, &msr_info)) {
895 pr_debug_ratelimited(
896 "%s cannot read MSR (%u, 0x%x)\n",
897 __func__, i, e.index);
900 if (kvm_vcpu_write_guest(vcpu,
901 gpa + i * sizeof(e) +
902 offsetof(struct vmx_msr_entry, value),
903 &msr_info.data, sizeof(msr_info.data))) {
904 pr_debug_ratelimited(
905 "%s cannot write MSR (%u, 0x%x, 0x%llx)\n",
906 __func__, i, e.index, msr_info.data);
913 static bool nested_cr3_valid(struct kvm_vcpu *vcpu, unsigned long val)
915 unsigned long invalid_mask;
917 invalid_mask = (~0ULL) << cpuid_maxphyaddr(vcpu);
918 return (val & invalid_mask) == 0;
922 * Load guest's/host's cr3 at nested entry/exit. nested_ept is true if we are
923 * emulating VM entry into a guest with EPT enabled.
924 * Returns 0 on success, 1 on failure. Invalid state exit qualification code
925 * is assigned to entry_failure_code on failure.
927 static int nested_vmx_load_cr3(struct kvm_vcpu *vcpu, unsigned long cr3, bool nested_ept,
928 u32 *entry_failure_code)
930 if (cr3 != kvm_read_cr3(vcpu) || (!nested_ept && pdptrs_changed(vcpu))) {
931 if (!nested_cr3_valid(vcpu, cr3)) {
932 *entry_failure_code = ENTRY_FAIL_DEFAULT;
937 * If PAE paging and EPT are both on, CR3 is not used by the CPU and
938 * must not be dereferenced.
940 if (!is_long_mode(vcpu) && is_pae(vcpu) && is_paging(vcpu) &&
942 if (!load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) {
943 *entry_failure_code = ENTRY_FAIL_PDPTE;
950 kvm_mmu_new_cr3(vcpu, cr3, false);
952 vcpu->arch.cr3 = cr3;
953 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
955 kvm_init_mmu(vcpu, false);
961 * Returns if KVM is able to config CPU to tag TLB entries
962 * populated by L2 differently than TLB entries populated
965 * If L1 uses EPT, then TLB entries are tagged with different EPTP.
967 * If L1 uses VPID and we allocated a vpid02, TLB entries are tagged
968 * with different VPID (L1 entries are tagged with vmx->vpid
969 * while L2 entries are tagged with vmx->nested.vpid02).
971 static bool nested_has_guest_tlb_tag(struct kvm_vcpu *vcpu)
973 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
975 return nested_cpu_has_ept(vmcs12) ||
976 (nested_cpu_has_vpid(vmcs12) && to_vmx(vcpu)->nested.vpid02);
979 static u16 nested_get_vpid02(struct kvm_vcpu *vcpu)
981 struct vcpu_vmx *vmx = to_vmx(vcpu);
983 return vmx->nested.vpid02 ? vmx->nested.vpid02 : vmx->vpid;
987 static inline bool vmx_control_verify(u32 control, u32 low, u32 high)
989 return fixed_bits_valid(control, low, high);
992 static inline u64 vmx_control_msr(u32 low, u32 high)
994 return low | ((u64)high << 32);
997 static bool is_bitwise_subset(u64 superset, u64 subset, u64 mask)
1002 return (superset | subset) == superset;
1005 static int vmx_restore_vmx_basic(struct vcpu_vmx *vmx, u64 data)
1007 const u64 feature_and_reserved =
1008 /* feature (except bit 48; see below) */
1009 BIT_ULL(49) | BIT_ULL(54) | BIT_ULL(55) |
1011 BIT_ULL(31) | GENMASK_ULL(47, 45) | GENMASK_ULL(63, 56);
1012 u64 vmx_basic = vmx->nested.msrs.basic;
1014 if (!is_bitwise_subset(vmx_basic, data, feature_and_reserved))
1018 * KVM does not emulate a version of VMX that constrains physical
1019 * addresses of VMX structures (e.g. VMCS) to 32-bits.
1021 if (data & BIT_ULL(48))
1024 if (vmx_basic_vmcs_revision_id(vmx_basic) !=
1025 vmx_basic_vmcs_revision_id(data))
1028 if (vmx_basic_vmcs_size(vmx_basic) > vmx_basic_vmcs_size(data))
1031 vmx->nested.msrs.basic = data;
1036 vmx_restore_control_msr(struct vcpu_vmx *vmx, u32 msr_index, u64 data)
1041 switch (msr_index) {
1042 case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
1043 lowp = &vmx->nested.msrs.pinbased_ctls_low;
1044 highp = &vmx->nested.msrs.pinbased_ctls_high;
1046 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
1047 lowp = &vmx->nested.msrs.procbased_ctls_low;
1048 highp = &vmx->nested.msrs.procbased_ctls_high;
1050 case MSR_IA32_VMX_TRUE_EXIT_CTLS:
1051 lowp = &vmx->nested.msrs.exit_ctls_low;
1052 highp = &vmx->nested.msrs.exit_ctls_high;
1054 case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
1055 lowp = &vmx->nested.msrs.entry_ctls_low;
1056 highp = &vmx->nested.msrs.entry_ctls_high;
1058 case MSR_IA32_VMX_PROCBASED_CTLS2:
1059 lowp = &vmx->nested.msrs.secondary_ctls_low;
1060 highp = &vmx->nested.msrs.secondary_ctls_high;
1066 supported = vmx_control_msr(*lowp, *highp);
1068 /* Check must-be-1 bits are still 1. */
1069 if (!is_bitwise_subset(data, supported, GENMASK_ULL(31, 0)))
1072 /* Check must-be-0 bits are still 0. */
1073 if (!is_bitwise_subset(supported, data, GENMASK_ULL(63, 32)))
1077 *highp = data >> 32;
1081 static int vmx_restore_vmx_misc(struct vcpu_vmx *vmx, u64 data)
1083 const u64 feature_and_reserved_bits =
1085 BIT_ULL(5) | GENMASK_ULL(8, 6) | BIT_ULL(14) | BIT_ULL(15) |
1086 BIT_ULL(28) | BIT_ULL(29) | BIT_ULL(30) |
1088 GENMASK_ULL(13, 9) | BIT_ULL(31);
1091 vmx_misc = vmx_control_msr(vmx->nested.msrs.misc_low,
1092 vmx->nested.msrs.misc_high);
1094 if (!is_bitwise_subset(vmx_misc, data, feature_and_reserved_bits))
1097 if ((vmx->nested.msrs.pinbased_ctls_high &
1098 PIN_BASED_VMX_PREEMPTION_TIMER) &&
1099 vmx_misc_preemption_timer_rate(data) !=
1100 vmx_misc_preemption_timer_rate(vmx_misc))
1103 if (vmx_misc_cr3_count(data) > vmx_misc_cr3_count(vmx_misc))
1106 if (vmx_misc_max_msr(data) > vmx_misc_max_msr(vmx_misc))
1109 if (vmx_misc_mseg_revid(data) != vmx_misc_mseg_revid(vmx_misc))
1112 vmx->nested.msrs.misc_low = data;
1113 vmx->nested.msrs.misc_high = data >> 32;
1116 * If L1 has read-only VM-exit information fields, use the
1117 * less permissive vmx_vmwrite_bitmap to specify write
1118 * permissions for the shadow VMCS.
1120 if (enable_shadow_vmcs && !nested_cpu_has_vmwrite_any_field(&vmx->vcpu))
1121 vmcs_write64(VMWRITE_BITMAP, __pa(vmx_vmwrite_bitmap));
1126 static int vmx_restore_vmx_ept_vpid_cap(struct vcpu_vmx *vmx, u64 data)
1128 u64 vmx_ept_vpid_cap;
1130 vmx_ept_vpid_cap = vmx_control_msr(vmx->nested.msrs.ept_caps,
1131 vmx->nested.msrs.vpid_caps);
1133 /* Every bit is either reserved or a feature bit. */
1134 if (!is_bitwise_subset(vmx_ept_vpid_cap, data, -1ULL))
1137 vmx->nested.msrs.ept_caps = data;
1138 vmx->nested.msrs.vpid_caps = data >> 32;
1142 static int vmx_restore_fixed0_msr(struct vcpu_vmx *vmx, u32 msr_index, u64 data)
1146 switch (msr_index) {
1147 case MSR_IA32_VMX_CR0_FIXED0:
1148 msr = &vmx->nested.msrs.cr0_fixed0;
1150 case MSR_IA32_VMX_CR4_FIXED0:
1151 msr = &vmx->nested.msrs.cr4_fixed0;
1158 * 1 bits (which indicates bits which "must-be-1" during VMX operation)
1159 * must be 1 in the restored value.
1161 if (!is_bitwise_subset(data, *msr, -1ULL))
1169 * Called when userspace is restoring VMX MSRs.
1171 * Returns 0 on success, non-0 otherwise.
1173 int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
1175 struct vcpu_vmx *vmx = to_vmx(vcpu);
1178 * Don't allow changes to the VMX capability MSRs while the vCPU
1179 * is in VMX operation.
1181 if (vmx->nested.vmxon)
1184 switch (msr_index) {
1185 case MSR_IA32_VMX_BASIC:
1186 return vmx_restore_vmx_basic(vmx, data);
1187 case MSR_IA32_VMX_PINBASED_CTLS:
1188 case MSR_IA32_VMX_PROCBASED_CTLS:
1189 case MSR_IA32_VMX_EXIT_CTLS:
1190 case MSR_IA32_VMX_ENTRY_CTLS:
1192 * The "non-true" VMX capability MSRs are generated from the
1193 * "true" MSRs, so we do not support restoring them directly.
1195 * If userspace wants to emulate VMX_BASIC[55]=0, userspace
1196 * should restore the "true" MSRs with the must-be-1 bits
1197 * set according to the SDM Vol 3. A.2 "RESERVED CONTROLS AND
1198 * DEFAULT SETTINGS".
1201 case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
1202 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
1203 case MSR_IA32_VMX_TRUE_EXIT_CTLS:
1204 case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
1205 case MSR_IA32_VMX_PROCBASED_CTLS2:
1206 return vmx_restore_control_msr(vmx, msr_index, data);
1207 case MSR_IA32_VMX_MISC:
1208 return vmx_restore_vmx_misc(vmx, data);
1209 case MSR_IA32_VMX_CR0_FIXED0:
1210 case MSR_IA32_VMX_CR4_FIXED0:
1211 return vmx_restore_fixed0_msr(vmx, msr_index, data);
1212 case MSR_IA32_VMX_CR0_FIXED1:
1213 case MSR_IA32_VMX_CR4_FIXED1:
1215 * These MSRs are generated based on the vCPU's CPUID, so we
1216 * do not support restoring them directly.
1219 case MSR_IA32_VMX_EPT_VPID_CAP:
1220 return vmx_restore_vmx_ept_vpid_cap(vmx, data);
1221 case MSR_IA32_VMX_VMCS_ENUM:
1222 vmx->nested.msrs.vmcs_enum = data;
1226 * The rest of the VMX capability MSRs do not support restore.
1232 /* Returns 0 on success, non-0 otherwise. */
1233 int vmx_get_vmx_msr(struct nested_vmx_msrs *msrs, u32 msr_index, u64 *pdata)
1235 switch (msr_index) {
1236 case MSR_IA32_VMX_BASIC:
1237 *pdata = msrs->basic;
1239 case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
1240 case MSR_IA32_VMX_PINBASED_CTLS:
1241 *pdata = vmx_control_msr(
1242 msrs->pinbased_ctls_low,
1243 msrs->pinbased_ctls_high);
1244 if (msr_index == MSR_IA32_VMX_PINBASED_CTLS)
1245 *pdata |= PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
1247 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
1248 case MSR_IA32_VMX_PROCBASED_CTLS:
1249 *pdata = vmx_control_msr(
1250 msrs->procbased_ctls_low,
1251 msrs->procbased_ctls_high);
1252 if (msr_index == MSR_IA32_VMX_PROCBASED_CTLS)
1253 *pdata |= CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
1255 case MSR_IA32_VMX_TRUE_EXIT_CTLS:
1256 case MSR_IA32_VMX_EXIT_CTLS:
1257 *pdata = vmx_control_msr(
1258 msrs->exit_ctls_low,
1259 msrs->exit_ctls_high);
1260 if (msr_index == MSR_IA32_VMX_EXIT_CTLS)
1261 *pdata |= VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR;
1263 case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
1264 case MSR_IA32_VMX_ENTRY_CTLS:
1265 *pdata = vmx_control_msr(
1266 msrs->entry_ctls_low,
1267 msrs->entry_ctls_high);
1268 if (msr_index == MSR_IA32_VMX_ENTRY_CTLS)
1269 *pdata |= VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR;
1271 case MSR_IA32_VMX_MISC:
1272 *pdata = vmx_control_msr(
1276 case MSR_IA32_VMX_CR0_FIXED0:
1277 *pdata = msrs->cr0_fixed0;
1279 case MSR_IA32_VMX_CR0_FIXED1:
1280 *pdata = msrs->cr0_fixed1;
1282 case MSR_IA32_VMX_CR4_FIXED0:
1283 *pdata = msrs->cr4_fixed0;
1285 case MSR_IA32_VMX_CR4_FIXED1:
1286 *pdata = msrs->cr4_fixed1;
1288 case MSR_IA32_VMX_VMCS_ENUM:
1289 *pdata = msrs->vmcs_enum;
1291 case MSR_IA32_VMX_PROCBASED_CTLS2:
1292 *pdata = vmx_control_msr(
1293 msrs->secondary_ctls_low,
1294 msrs->secondary_ctls_high);
1296 case MSR_IA32_VMX_EPT_VPID_CAP:
1297 *pdata = msrs->ept_caps |
1298 ((u64)msrs->vpid_caps << 32);
1300 case MSR_IA32_VMX_VMFUNC:
1301 *pdata = msrs->vmfunc_controls;
1311 * Copy the writable VMCS shadow fields back to the VMCS12, in case
1312 * they have been modified by the L1 guest. Note that the "read-only"
1313 * VM-exit information fields are actually writable if the vCPU is
1314 * configured to support "VMWRITE to any supported field in the VMCS."
1316 static void copy_shadow_to_vmcs12(struct vcpu_vmx *vmx)
1318 const u16 *fields[] = {
1319 shadow_read_write_fields,
1320 shadow_read_only_fields
1322 const int max_fields[] = {
1323 max_shadow_read_write_fields,
1324 max_shadow_read_only_fields
1327 unsigned long field;
1329 struct vmcs *shadow_vmcs = vmx->vmcs01.shadow_vmcs;
1333 vmcs_load(shadow_vmcs);
1335 for (q = 0; q < ARRAY_SIZE(fields); q++) {
1336 for (i = 0; i < max_fields[q]; i++) {
1337 field = fields[q][i];
1338 field_value = __vmcs_readl(field);
1339 vmcs12_write_any(get_vmcs12(&vmx->vcpu), field, field_value);
1342 * Skip the VM-exit information fields if they are read-only.
1344 if (!nested_cpu_has_vmwrite_any_field(&vmx->vcpu))
1348 vmcs_clear(shadow_vmcs);
1349 vmcs_load(vmx->loaded_vmcs->vmcs);
1354 static void copy_vmcs12_to_shadow(struct vcpu_vmx *vmx)
1356 const u16 *fields[] = {
1357 shadow_read_write_fields,
1358 shadow_read_only_fields
1360 const int max_fields[] = {
1361 max_shadow_read_write_fields,
1362 max_shadow_read_only_fields
1365 unsigned long field;
1366 u64 field_value = 0;
1367 struct vmcs *shadow_vmcs = vmx->vmcs01.shadow_vmcs;
1369 vmcs_load(shadow_vmcs);
1371 for (q = 0; q < ARRAY_SIZE(fields); q++) {
1372 for (i = 0; i < max_fields[q]; i++) {
1373 field = fields[q][i];
1374 vmcs12_read_any(get_vmcs12(&vmx->vcpu), field, &field_value);
1375 __vmcs_writel(field, field_value);
1379 vmcs_clear(shadow_vmcs);
1380 vmcs_load(vmx->loaded_vmcs->vmcs);
1383 static int copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx)
1385 struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
1386 struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
1388 /* HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE */
1389 vmcs12->tpr_threshold = evmcs->tpr_threshold;
1390 vmcs12->guest_rip = evmcs->guest_rip;
1392 if (unlikely(!(evmcs->hv_clean_fields &
1393 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC))) {
1394 vmcs12->guest_rsp = evmcs->guest_rsp;
1395 vmcs12->guest_rflags = evmcs->guest_rflags;
1396 vmcs12->guest_interruptibility_info =
1397 evmcs->guest_interruptibility_info;
1400 if (unlikely(!(evmcs->hv_clean_fields &
1401 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC))) {
1402 vmcs12->cpu_based_vm_exec_control =
1403 evmcs->cpu_based_vm_exec_control;
1406 if (unlikely(!(evmcs->hv_clean_fields &
1407 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC))) {
1408 vmcs12->exception_bitmap = evmcs->exception_bitmap;
1411 if (unlikely(!(evmcs->hv_clean_fields &
1412 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_ENTRY))) {
1413 vmcs12->vm_entry_controls = evmcs->vm_entry_controls;
1416 if (unlikely(!(evmcs->hv_clean_fields &
1417 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT))) {
1418 vmcs12->vm_entry_intr_info_field =
1419 evmcs->vm_entry_intr_info_field;
1420 vmcs12->vm_entry_exception_error_code =
1421 evmcs->vm_entry_exception_error_code;
1422 vmcs12->vm_entry_instruction_len =
1423 evmcs->vm_entry_instruction_len;
1426 if (unlikely(!(evmcs->hv_clean_fields &
1427 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1))) {
1428 vmcs12->host_ia32_pat = evmcs->host_ia32_pat;
1429 vmcs12->host_ia32_efer = evmcs->host_ia32_efer;
1430 vmcs12->host_cr0 = evmcs->host_cr0;
1431 vmcs12->host_cr3 = evmcs->host_cr3;
1432 vmcs12->host_cr4 = evmcs->host_cr4;
1433 vmcs12->host_ia32_sysenter_esp = evmcs->host_ia32_sysenter_esp;
1434 vmcs12->host_ia32_sysenter_eip = evmcs->host_ia32_sysenter_eip;
1435 vmcs12->host_rip = evmcs->host_rip;
1436 vmcs12->host_ia32_sysenter_cs = evmcs->host_ia32_sysenter_cs;
1437 vmcs12->host_es_selector = evmcs->host_es_selector;
1438 vmcs12->host_cs_selector = evmcs->host_cs_selector;
1439 vmcs12->host_ss_selector = evmcs->host_ss_selector;
1440 vmcs12->host_ds_selector = evmcs->host_ds_selector;
1441 vmcs12->host_fs_selector = evmcs->host_fs_selector;
1442 vmcs12->host_gs_selector = evmcs->host_gs_selector;
1443 vmcs12->host_tr_selector = evmcs->host_tr_selector;
1446 if (unlikely(!(evmcs->hv_clean_fields &
1447 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1))) {
1448 vmcs12->pin_based_vm_exec_control =
1449 evmcs->pin_based_vm_exec_control;
1450 vmcs12->vm_exit_controls = evmcs->vm_exit_controls;
1451 vmcs12->secondary_vm_exec_control =
1452 evmcs->secondary_vm_exec_control;
1455 if (unlikely(!(evmcs->hv_clean_fields &
1456 HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP))) {
1457 vmcs12->io_bitmap_a = evmcs->io_bitmap_a;
1458 vmcs12->io_bitmap_b = evmcs->io_bitmap_b;
1461 if (unlikely(!(evmcs->hv_clean_fields &
1462 HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP))) {
1463 vmcs12->msr_bitmap = evmcs->msr_bitmap;
1466 if (unlikely(!(evmcs->hv_clean_fields &
1467 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2))) {
1468 vmcs12->guest_es_base = evmcs->guest_es_base;
1469 vmcs12->guest_cs_base = evmcs->guest_cs_base;
1470 vmcs12->guest_ss_base = evmcs->guest_ss_base;
1471 vmcs12->guest_ds_base = evmcs->guest_ds_base;
1472 vmcs12->guest_fs_base = evmcs->guest_fs_base;
1473 vmcs12->guest_gs_base = evmcs->guest_gs_base;
1474 vmcs12->guest_ldtr_base = evmcs->guest_ldtr_base;
1475 vmcs12->guest_tr_base = evmcs->guest_tr_base;
1476 vmcs12->guest_gdtr_base = evmcs->guest_gdtr_base;
1477 vmcs12->guest_idtr_base = evmcs->guest_idtr_base;
1478 vmcs12->guest_es_limit = evmcs->guest_es_limit;
1479 vmcs12->guest_cs_limit = evmcs->guest_cs_limit;
1480 vmcs12->guest_ss_limit = evmcs->guest_ss_limit;
1481 vmcs12->guest_ds_limit = evmcs->guest_ds_limit;
1482 vmcs12->guest_fs_limit = evmcs->guest_fs_limit;
1483 vmcs12->guest_gs_limit = evmcs->guest_gs_limit;
1484 vmcs12->guest_ldtr_limit = evmcs->guest_ldtr_limit;
1485 vmcs12->guest_tr_limit = evmcs->guest_tr_limit;
1486 vmcs12->guest_gdtr_limit = evmcs->guest_gdtr_limit;
1487 vmcs12->guest_idtr_limit = evmcs->guest_idtr_limit;
1488 vmcs12->guest_es_ar_bytes = evmcs->guest_es_ar_bytes;
1489 vmcs12->guest_cs_ar_bytes = evmcs->guest_cs_ar_bytes;
1490 vmcs12->guest_ss_ar_bytes = evmcs->guest_ss_ar_bytes;
1491 vmcs12->guest_ds_ar_bytes = evmcs->guest_ds_ar_bytes;
1492 vmcs12->guest_fs_ar_bytes = evmcs->guest_fs_ar_bytes;
1493 vmcs12->guest_gs_ar_bytes = evmcs->guest_gs_ar_bytes;
1494 vmcs12->guest_ldtr_ar_bytes = evmcs->guest_ldtr_ar_bytes;
1495 vmcs12->guest_tr_ar_bytes = evmcs->guest_tr_ar_bytes;
1496 vmcs12->guest_es_selector = evmcs->guest_es_selector;
1497 vmcs12->guest_cs_selector = evmcs->guest_cs_selector;
1498 vmcs12->guest_ss_selector = evmcs->guest_ss_selector;
1499 vmcs12->guest_ds_selector = evmcs->guest_ds_selector;
1500 vmcs12->guest_fs_selector = evmcs->guest_fs_selector;
1501 vmcs12->guest_gs_selector = evmcs->guest_gs_selector;
1502 vmcs12->guest_ldtr_selector = evmcs->guest_ldtr_selector;
1503 vmcs12->guest_tr_selector = evmcs->guest_tr_selector;
1506 if (unlikely(!(evmcs->hv_clean_fields &
1507 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2))) {
1508 vmcs12->tsc_offset = evmcs->tsc_offset;
1509 vmcs12->virtual_apic_page_addr = evmcs->virtual_apic_page_addr;
1510 vmcs12->xss_exit_bitmap = evmcs->xss_exit_bitmap;
1513 if (unlikely(!(evmcs->hv_clean_fields &
1514 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR))) {
1515 vmcs12->cr0_guest_host_mask = evmcs->cr0_guest_host_mask;
1516 vmcs12->cr4_guest_host_mask = evmcs->cr4_guest_host_mask;
1517 vmcs12->cr0_read_shadow = evmcs->cr0_read_shadow;
1518 vmcs12->cr4_read_shadow = evmcs->cr4_read_shadow;
1519 vmcs12->guest_cr0 = evmcs->guest_cr0;
1520 vmcs12->guest_cr3 = evmcs->guest_cr3;
1521 vmcs12->guest_cr4 = evmcs->guest_cr4;
1522 vmcs12->guest_dr7 = evmcs->guest_dr7;
1525 if (unlikely(!(evmcs->hv_clean_fields &
1526 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER))) {
1527 vmcs12->host_fs_base = evmcs->host_fs_base;
1528 vmcs12->host_gs_base = evmcs->host_gs_base;
1529 vmcs12->host_tr_base = evmcs->host_tr_base;
1530 vmcs12->host_gdtr_base = evmcs->host_gdtr_base;
1531 vmcs12->host_idtr_base = evmcs->host_idtr_base;
1532 vmcs12->host_rsp = evmcs->host_rsp;
1535 if (unlikely(!(evmcs->hv_clean_fields &
1536 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT))) {
1537 vmcs12->ept_pointer = evmcs->ept_pointer;
1538 vmcs12->virtual_processor_id = evmcs->virtual_processor_id;
1541 if (unlikely(!(evmcs->hv_clean_fields &
1542 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1))) {
1543 vmcs12->vmcs_link_pointer = evmcs->vmcs_link_pointer;
1544 vmcs12->guest_ia32_debugctl = evmcs->guest_ia32_debugctl;
1545 vmcs12->guest_ia32_pat = evmcs->guest_ia32_pat;
1546 vmcs12->guest_ia32_efer = evmcs->guest_ia32_efer;
1547 vmcs12->guest_pdptr0 = evmcs->guest_pdptr0;
1548 vmcs12->guest_pdptr1 = evmcs->guest_pdptr1;
1549 vmcs12->guest_pdptr2 = evmcs->guest_pdptr2;
1550 vmcs12->guest_pdptr3 = evmcs->guest_pdptr3;
1551 vmcs12->guest_pending_dbg_exceptions =
1552 evmcs->guest_pending_dbg_exceptions;
1553 vmcs12->guest_sysenter_esp = evmcs->guest_sysenter_esp;
1554 vmcs12->guest_sysenter_eip = evmcs->guest_sysenter_eip;
1555 vmcs12->guest_bndcfgs = evmcs->guest_bndcfgs;
1556 vmcs12->guest_activity_state = evmcs->guest_activity_state;
1557 vmcs12->guest_sysenter_cs = evmcs->guest_sysenter_cs;
1562 * vmcs12->vm_exit_msr_store_addr = evmcs->vm_exit_msr_store_addr;
1563 * vmcs12->vm_exit_msr_load_addr = evmcs->vm_exit_msr_load_addr;
1564 * vmcs12->vm_entry_msr_load_addr = evmcs->vm_entry_msr_load_addr;
1565 * vmcs12->cr3_target_value0 = evmcs->cr3_target_value0;
1566 * vmcs12->cr3_target_value1 = evmcs->cr3_target_value1;
1567 * vmcs12->cr3_target_value2 = evmcs->cr3_target_value2;
1568 * vmcs12->cr3_target_value3 = evmcs->cr3_target_value3;
1569 * vmcs12->page_fault_error_code_mask =
1570 * evmcs->page_fault_error_code_mask;
1571 * vmcs12->page_fault_error_code_match =
1572 * evmcs->page_fault_error_code_match;
1573 * vmcs12->cr3_target_count = evmcs->cr3_target_count;
1574 * vmcs12->vm_exit_msr_store_count = evmcs->vm_exit_msr_store_count;
1575 * vmcs12->vm_exit_msr_load_count = evmcs->vm_exit_msr_load_count;
1576 * vmcs12->vm_entry_msr_load_count = evmcs->vm_entry_msr_load_count;
1581 * vmcs12->guest_physical_address = evmcs->guest_physical_address;
1582 * vmcs12->vm_instruction_error = evmcs->vm_instruction_error;
1583 * vmcs12->vm_exit_reason = evmcs->vm_exit_reason;
1584 * vmcs12->vm_exit_intr_info = evmcs->vm_exit_intr_info;
1585 * vmcs12->vm_exit_intr_error_code = evmcs->vm_exit_intr_error_code;
1586 * vmcs12->idt_vectoring_info_field = evmcs->idt_vectoring_info_field;
1587 * vmcs12->idt_vectoring_error_code = evmcs->idt_vectoring_error_code;
1588 * vmcs12->vm_exit_instruction_len = evmcs->vm_exit_instruction_len;
1589 * vmcs12->vmx_instruction_info = evmcs->vmx_instruction_info;
1590 * vmcs12->exit_qualification = evmcs->exit_qualification;
1591 * vmcs12->guest_linear_address = evmcs->guest_linear_address;
1593 * Not present in struct vmcs12:
1594 * vmcs12->exit_io_instruction_ecx = evmcs->exit_io_instruction_ecx;
1595 * vmcs12->exit_io_instruction_esi = evmcs->exit_io_instruction_esi;
1596 * vmcs12->exit_io_instruction_edi = evmcs->exit_io_instruction_edi;
1597 * vmcs12->exit_io_instruction_eip = evmcs->exit_io_instruction_eip;
1603 static int copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
1605 struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
1606 struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
1609 * Should not be changed by KVM:
1611 * evmcs->host_es_selector = vmcs12->host_es_selector;
1612 * evmcs->host_cs_selector = vmcs12->host_cs_selector;
1613 * evmcs->host_ss_selector = vmcs12->host_ss_selector;
1614 * evmcs->host_ds_selector = vmcs12->host_ds_selector;
1615 * evmcs->host_fs_selector = vmcs12->host_fs_selector;
1616 * evmcs->host_gs_selector = vmcs12->host_gs_selector;
1617 * evmcs->host_tr_selector = vmcs12->host_tr_selector;
1618 * evmcs->host_ia32_pat = vmcs12->host_ia32_pat;
1619 * evmcs->host_ia32_efer = vmcs12->host_ia32_efer;
1620 * evmcs->host_cr0 = vmcs12->host_cr0;
1621 * evmcs->host_cr3 = vmcs12->host_cr3;
1622 * evmcs->host_cr4 = vmcs12->host_cr4;
1623 * evmcs->host_ia32_sysenter_esp = vmcs12->host_ia32_sysenter_esp;
1624 * evmcs->host_ia32_sysenter_eip = vmcs12->host_ia32_sysenter_eip;
1625 * evmcs->host_rip = vmcs12->host_rip;
1626 * evmcs->host_ia32_sysenter_cs = vmcs12->host_ia32_sysenter_cs;
1627 * evmcs->host_fs_base = vmcs12->host_fs_base;
1628 * evmcs->host_gs_base = vmcs12->host_gs_base;
1629 * evmcs->host_tr_base = vmcs12->host_tr_base;
1630 * evmcs->host_gdtr_base = vmcs12->host_gdtr_base;
1631 * evmcs->host_idtr_base = vmcs12->host_idtr_base;
1632 * evmcs->host_rsp = vmcs12->host_rsp;
1633 * sync_vmcs12() doesn't read these:
1634 * evmcs->io_bitmap_a = vmcs12->io_bitmap_a;
1635 * evmcs->io_bitmap_b = vmcs12->io_bitmap_b;
1636 * evmcs->msr_bitmap = vmcs12->msr_bitmap;
1637 * evmcs->ept_pointer = vmcs12->ept_pointer;
1638 * evmcs->xss_exit_bitmap = vmcs12->xss_exit_bitmap;
1639 * evmcs->vm_exit_msr_store_addr = vmcs12->vm_exit_msr_store_addr;
1640 * evmcs->vm_exit_msr_load_addr = vmcs12->vm_exit_msr_load_addr;
1641 * evmcs->vm_entry_msr_load_addr = vmcs12->vm_entry_msr_load_addr;
1642 * evmcs->cr3_target_value0 = vmcs12->cr3_target_value0;
1643 * evmcs->cr3_target_value1 = vmcs12->cr3_target_value1;
1644 * evmcs->cr3_target_value2 = vmcs12->cr3_target_value2;
1645 * evmcs->cr3_target_value3 = vmcs12->cr3_target_value3;
1646 * evmcs->tpr_threshold = vmcs12->tpr_threshold;
1647 * evmcs->virtual_processor_id = vmcs12->virtual_processor_id;
1648 * evmcs->exception_bitmap = vmcs12->exception_bitmap;
1649 * evmcs->vmcs_link_pointer = vmcs12->vmcs_link_pointer;
1650 * evmcs->pin_based_vm_exec_control = vmcs12->pin_based_vm_exec_control;
1651 * evmcs->vm_exit_controls = vmcs12->vm_exit_controls;
1652 * evmcs->secondary_vm_exec_control = vmcs12->secondary_vm_exec_control;
1653 * evmcs->page_fault_error_code_mask =
1654 * vmcs12->page_fault_error_code_mask;
1655 * evmcs->page_fault_error_code_match =
1656 * vmcs12->page_fault_error_code_match;
1657 * evmcs->cr3_target_count = vmcs12->cr3_target_count;
1658 * evmcs->virtual_apic_page_addr = vmcs12->virtual_apic_page_addr;
1659 * evmcs->tsc_offset = vmcs12->tsc_offset;
1660 * evmcs->guest_ia32_debugctl = vmcs12->guest_ia32_debugctl;
1661 * evmcs->cr0_guest_host_mask = vmcs12->cr0_guest_host_mask;
1662 * evmcs->cr4_guest_host_mask = vmcs12->cr4_guest_host_mask;
1663 * evmcs->cr0_read_shadow = vmcs12->cr0_read_shadow;
1664 * evmcs->cr4_read_shadow = vmcs12->cr4_read_shadow;
1665 * evmcs->vm_exit_msr_store_count = vmcs12->vm_exit_msr_store_count;
1666 * evmcs->vm_exit_msr_load_count = vmcs12->vm_exit_msr_load_count;
1667 * evmcs->vm_entry_msr_load_count = vmcs12->vm_entry_msr_load_count;
1669 * Not present in struct vmcs12:
1670 * evmcs->exit_io_instruction_ecx = vmcs12->exit_io_instruction_ecx;
1671 * evmcs->exit_io_instruction_esi = vmcs12->exit_io_instruction_esi;
1672 * evmcs->exit_io_instruction_edi = vmcs12->exit_io_instruction_edi;
1673 * evmcs->exit_io_instruction_eip = vmcs12->exit_io_instruction_eip;
1676 evmcs->guest_es_selector = vmcs12->guest_es_selector;
1677 evmcs->guest_cs_selector = vmcs12->guest_cs_selector;
1678 evmcs->guest_ss_selector = vmcs12->guest_ss_selector;
1679 evmcs->guest_ds_selector = vmcs12->guest_ds_selector;
1680 evmcs->guest_fs_selector = vmcs12->guest_fs_selector;
1681 evmcs->guest_gs_selector = vmcs12->guest_gs_selector;
1682 evmcs->guest_ldtr_selector = vmcs12->guest_ldtr_selector;
1683 evmcs->guest_tr_selector = vmcs12->guest_tr_selector;
1685 evmcs->guest_es_limit = vmcs12->guest_es_limit;
1686 evmcs->guest_cs_limit = vmcs12->guest_cs_limit;
1687 evmcs->guest_ss_limit = vmcs12->guest_ss_limit;
1688 evmcs->guest_ds_limit = vmcs12->guest_ds_limit;
1689 evmcs->guest_fs_limit = vmcs12->guest_fs_limit;
1690 evmcs->guest_gs_limit = vmcs12->guest_gs_limit;
1691 evmcs->guest_ldtr_limit = vmcs12->guest_ldtr_limit;
1692 evmcs->guest_tr_limit = vmcs12->guest_tr_limit;
1693 evmcs->guest_gdtr_limit = vmcs12->guest_gdtr_limit;
1694 evmcs->guest_idtr_limit = vmcs12->guest_idtr_limit;
1696 evmcs->guest_es_ar_bytes = vmcs12->guest_es_ar_bytes;
1697 evmcs->guest_cs_ar_bytes = vmcs12->guest_cs_ar_bytes;
1698 evmcs->guest_ss_ar_bytes = vmcs12->guest_ss_ar_bytes;
1699 evmcs->guest_ds_ar_bytes = vmcs12->guest_ds_ar_bytes;
1700 evmcs->guest_fs_ar_bytes = vmcs12->guest_fs_ar_bytes;
1701 evmcs->guest_gs_ar_bytes = vmcs12->guest_gs_ar_bytes;
1702 evmcs->guest_ldtr_ar_bytes = vmcs12->guest_ldtr_ar_bytes;
1703 evmcs->guest_tr_ar_bytes = vmcs12->guest_tr_ar_bytes;
1705 evmcs->guest_es_base = vmcs12->guest_es_base;
1706 evmcs->guest_cs_base = vmcs12->guest_cs_base;
1707 evmcs->guest_ss_base = vmcs12->guest_ss_base;
1708 evmcs->guest_ds_base = vmcs12->guest_ds_base;
1709 evmcs->guest_fs_base = vmcs12->guest_fs_base;
1710 evmcs->guest_gs_base = vmcs12->guest_gs_base;
1711 evmcs->guest_ldtr_base = vmcs12->guest_ldtr_base;
1712 evmcs->guest_tr_base = vmcs12->guest_tr_base;
1713 evmcs->guest_gdtr_base = vmcs12->guest_gdtr_base;
1714 evmcs->guest_idtr_base = vmcs12->guest_idtr_base;
1716 evmcs->guest_ia32_pat = vmcs12->guest_ia32_pat;
1717 evmcs->guest_ia32_efer = vmcs12->guest_ia32_efer;
1719 evmcs->guest_pdptr0 = vmcs12->guest_pdptr0;
1720 evmcs->guest_pdptr1 = vmcs12->guest_pdptr1;
1721 evmcs->guest_pdptr2 = vmcs12->guest_pdptr2;
1722 evmcs->guest_pdptr3 = vmcs12->guest_pdptr3;
1724 evmcs->guest_pending_dbg_exceptions =
1725 vmcs12->guest_pending_dbg_exceptions;
1726 evmcs->guest_sysenter_esp = vmcs12->guest_sysenter_esp;
1727 evmcs->guest_sysenter_eip = vmcs12->guest_sysenter_eip;
1729 evmcs->guest_activity_state = vmcs12->guest_activity_state;
1730 evmcs->guest_sysenter_cs = vmcs12->guest_sysenter_cs;
1732 evmcs->guest_cr0 = vmcs12->guest_cr0;
1733 evmcs->guest_cr3 = vmcs12->guest_cr3;
1734 evmcs->guest_cr4 = vmcs12->guest_cr4;
1735 evmcs->guest_dr7 = vmcs12->guest_dr7;
1737 evmcs->guest_physical_address = vmcs12->guest_physical_address;
1739 evmcs->vm_instruction_error = vmcs12->vm_instruction_error;
1740 evmcs->vm_exit_reason = vmcs12->vm_exit_reason;
1741 evmcs->vm_exit_intr_info = vmcs12->vm_exit_intr_info;
1742 evmcs->vm_exit_intr_error_code = vmcs12->vm_exit_intr_error_code;
1743 evmcs->idt_vectoring_info_field = vmcs12->idt_vectoring_info_field;
1744 evmcs->idt_vectoring_error_code = vmcs12->idt_vectoring_error_code;
1745 evmcs->vm_exit_instruction_len = vmcs12->vm_exit_instruction_len;
1746 evmcs->vmx_instruction_info = vmcs12->vmx_instruction_info;
1748 evmcs->exit_qualification = vmcs12->exit_qualification;
1750 evmcs->guest_linear_address = vmcs12->guest_linear_address;
1751 evmcs->guest_rsp = vmcs12->guest_rsp;
1752 evmcs->guest_rflags = vmcs12->guest_rflags;
1754 evmcs->guest_interruptibility_info =
1755 vmcs12->guest_interruptibility_info;
1756 evmcs->cpu_based_vm_exec_control = vmcs12->cpu_based_vm_exec_control;
1757 evmcs->vm_entry_controls = vmcs12->vm_entry_controls;
1758 evmcs->vm_entry_intr_info_field = vmcs12->vm_entry_intr_info_field;
1759 evmcs->vm_entry_exception_error_code =
1760 vmcs12->vm_entry_exception_error_code;
1761 evmcs->vm_entry_instruction_len = vmcs12->vm_entry_instruction_len;
1763 evmcs->guest_rip = vmcs12->guest_rip;
1765 evmcs->guest_bndcfgs = vmcs12->guest_bndcfgs;
1771 * This is an equivalent of the nested hypervisor executing the vmptrld
1774 static int nested_vmx_handle_enlightened_vmptrld(struct kvm_vcpu *vcpu,
1777 struct vcpu_vmx *vmx = to_vmx(vcpu);
1778 struct hv_vp_assist_page assist_page;
1780 if (likely(!vmx->nested.enlightened_vmcs_enabled))
1783 if (unlikely(!kvm_hv_get_assist_page(vcpu, &assist_page)))
1786 if (unlikely(!assist_page.enlighten_vmentry))
1789 if (unlikely(assist_page.current_nested_vmcs !=
1790 vmx->nested.hv_evmcs_vmptr)) {
1792 if (!vmx->nested.hv_evmcs)
1793 vmx->nested.current_vmptr = -1ull;
1795 nested_release_evmcs(vcpu);
1797 vmx->nested.hv_evmcs_page = kvm_vcpu_gpa_to_page(
1798 vcpu, assist_page.current_nested_vmcs);
1800 if (unlikely(is_error_page(vmx->nested.hv_evmcs_page)))
1803 vmx->nested.hv_evmcs = kmap(vmx->nested.hv_evmcs_page);
1806 * Currently, KVM only supports eVMCS version 1
1807 * (== KVM_EVMCS_VERSION) and thus we expect guest to set this
1808 * value to first u32 field of eVMCS which should specify eVMCS
1811 * Guest should be aware of supported eVMCS versions by host by
1812 * examining CPUID.0x4000000A.EAX[0:15]. Host userspace VMM is
1813 * expected to set this CPUID leaf according to the value
1814 * returned in vmcs_version from nested_enable_evmcs().
1816 * However, it turns out that Microsoft Hyper-V fails to comply
1817 * to their own invented interface: When Hyper-V use eVMCS, it
1818 * just sets first u32 field of eVMCS to revision_id specified
1819 * in MSR_IA32_VMX_BASIC. Instead of used eVMCS version number
1820 * which is one of the supported versions specified in
1821 * CPUID.0x4000000A.EAX[0:15].
1823 * To overcome Hyper-V bug, we accept here either a supported
1824 * eVMCS version or VMCS12 revision_id as valid values for first
1825 * u32 field of eVMCS.
1827 if ((vmx->nested.hv_evmcs->revision_id != KVM_EVMCS_VERSION) &&
1828 (vmx->nested.hv_evmcs->revision_id != VMCS12_REVISION)) {
1829 nested_release_evmcs(vcpu);
1833 vmx->nested.dirty_vmcs12 = true;
1835 * As we keep L2 state for one guest only 'hv_clean_fields' mask
1836 * can't be used when we switch between them. Reset it here for
1839 vmx->nested.hv_evmcs->hv_clean_fields &=
1840 ~HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
1841 vmx->nested.hv_evmcs_vmptr = assist_page.current_nested_vmcs;
1844 * Unlike normal vmcs12, enlightened vmcs12 is not fully
1845 * reloaded from guest's memory (read only fields, fields not
1846 * present in struct hv_enlightened_vmcs, ...). Make sure there
1850 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
1851 memset(vmcs12, 0, sizeof(*vmcs12));
1852 vmcs12->hdr.revision_id = VMCS12_REVISION;
1859 void nested_sync_from_vmcs12(struct kvm_vcpu *vcpu)
1861 struct vcpu_vmx *vmx = to_vmx(vcpu);
1864 * hv_evmcs may end up being not mapped after migration (when
1865 * L2 was running), map it here to make sure vmcs12 changes are
1866 * properly reflected.
1868 if (vmx->nested.enlightened_vmcs_enabled && !vmx->nested.hv_evmcs)
1869 nested_vmx_handle_enlightened_vmptrld(vcpu, false);
1871 if (vmx->nested.hv_evmcs) {
1872 copy_vmcs12_to_enlightened(vmx);
1873 /* All fields are clean */
1874 vmx->nested.hv_evmcs->hv_clean_fields |=
1875 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
1877 copy_vmcs12_to_shadow(vmx);
1880 vmx->nested.need_vmcs12_sync = false;
1883 static enum hrtimer_restart vmx_preemption_timer_fn(struct hrtimer *timer)
1885 struct vcpu_vmx *vmx =
1886 container_of(timer, struct vcpu_vmx, nested.preemption_timer);
1888 vmx->nested.preemption_timer_expired = true;
1889 kvm_make_request(KVM_REQ_EVENT, &vmx->vcpu);
1890 kvm_vcpu_kick(&vmx->vcpu);
1892 return HRTIMER_NORESTART;
1895 static void vmx_start_preemption_timer(struct kvm_vcpu *vcpu)
1897 u64 preemption_timeout = get_vmcs12(vcpu)->vmx_preemption_timer_value;
1898 struct vcpu_vmx *vmx = to_vmx(vcpu);
1901 * A timer value of zero is architecturally guaranteed to cause
1902 * a VMExit prior to executing any instructions in the guest.
1904 if (preemption_timeout == 0) {
1905 vmx_preemption_timer_fn(&vmx->nested.preemption_timer);
1909 if (vcpu->arch.virtual_tsc_khz == 0)
1912 preemption_timeout <<= VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE;
1913 preemption_timeout *= 1000000;
1914 do_div(preemption_timeout, vcpu->arch.virtual_tsc_khz);
1915 hrtimer_start(&vmx->nested.preemption_timer,
1916 ns_to_ktime(preemption_timeout), HRTIMER_MODE_REL);
1919 static u64 nested_vmx_calc_efer(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
1921 if (vmx->nested.nested_run_pending &&
1922 (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_EFER))
1923 return vmcs12->guest_ia32_efer;
1924 else if (vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE)
1925 return vmx->vcpu.arch.efer | (EFER_LMA | EFER_LME);
1927 return vmx->vcpu.arch.efer & ~(EFER_LMA | EFER_LME);
1930 static void prepare_vmcs02_constant_state(struct vcpu_vmx *vmx)
1933 * If vmcs02 hasn't been initialized, set the constant vmcs02 state
1934 * according to L0's settings (vmcs12 is irrelevant here). Host
1935 * fields that come from L0 and are not constant, e.g. HOST_CR3,
1936 * will be set as needed prior to VMLAUNCH/VMRESUME.
1938 if (vmx->nested.vmcs02_initialized)
1940 vmx->nested.vmcs02_initialized = true;
1943 * We don't care what the EPTP value is we just need to guarantee
1944 * it's valid so we don't get a false positive when doing early
1945 * consistency checks.
1947 if (enable_ept && nested_early_check)
1948 vmcs_write64(EPT_POINTER, construct_eptp(&vmx->vcpu, 0));
1950 /* All VMFUNCs are currently emulated through L0 vmexits. */
1951 if (cpu_has_vmx_vmfunc())
1952 vmcs_write64(VM_FUNCTION_CONTROL, 0);
1954 if (cpu_has_vmx_posted_intr())
1955 vmcs_write16(POSTED_INTR_NV, POSTED_INTR_NESTED_VECTOR);
1957 if (cpu_has_vmx_msr_bitmap())
1958 vmcs_write64(MSR_BITMAP, __pa(vmx->nested.vmcs02.msr_bitmap));
1961 vmcs_write64(PML_ADDRESS, page_to_phys(vmx->pml_pg));
1964 * Set the MSR load/store lists to match L0's settings. Only the
1965 * addresses are constant (for vmcs02), the counts can change based
1966 * on L2's behavior, e.g. switching to/from long mode.
1968 vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
1969 vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host.val));
1970 vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest.val));
1972 vmx_set_constant_host_state(vmx);
1975 static void prepare_vmcs02_early_full(struct vcpu_vmx *vmx,
1976 struct vmcs12 *vmcs12)
1978 prepare_vmcs02_constant_state(vmx);
1980 vmcs_write64(VMCS_LINK_POINTER, -1ull);
1983 if (nested_cpu_has_vpid(vmcs12) && vmx->nested.vpid02)
1984 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->nested.vpid02);
1986 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
1990 static void prepare_vmcs02_early(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
1992 u32 exec_control, vmcs12_exec_ctrl;
1993 u64 guest_efer = nested_vmx_calc_efer(vmx, vmcs12);
1995 if (vmx->nested.dirty_vmcs12 || vmx->nested.hv_evmcs)
1996 prepare_vmcs02_early_full(vmx, vmcs12);
2001 exec_control = vmcs12->pin_based_vm_exec_control;
2003 /* Preemption timer setting is computed directly in vmx_vcpu_run. */
2004 exec_control |= vmcs_config.pin_based_exec_ctrl;
2005 exec_control &= ~PIN_BASED_VMX_PREEMPTION_TIMER;
2006 vmx->loaded_vmcs->hv_timer_armed = false;
2008 /* Posted interrupts setting is only taken from vmcs12. */
2009 if (nested_cpu_has_posted_intr(vmcs12)) {
2010 vmx->nested.posted_intr_nv = vmcs12->posted_intr_nv;
2011 vmx->nested.pi_pending = false;
2013 exec_control &= ~PIN_BASED_POSTED_INTR;
2015 vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, exec_control);
2020 exec_control = vmx_exec_control(vmx); /* L0's desires */
2021 exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
2022 exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
2023 exec_control &= ~CPU_BASED_TPR_SHADOW;
2024 exec_control |= vmcs12->cpu_based_vm_exec_control;
2027 * Write an illegal value to VIRTUAL_APIC_PAGE_ADDR. Later, if
2028 * nested_get_vmcs12_pages can't fix it up, the illegal value
2029 * will result in a VM entry failure.
2031 if (exec_control & CPU_BASED_TPR_SHADOW) {
2032 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, -1ull);
2033 vmcs_write32(TPR_THRESHOLD, vmcs12->tpr_threshold);
2035 #ifdef CONFIG_X86_64
2036 exec_control |= CPU_BASED_CR8_LOAD_EXITING |
2037 CPU_BASED_CR8_STORE_EXITING;
2042 * A vmexit (to either L1 hypervisor or L0 userspace) is always needed
2043 * for I/O port accesses.
2045 exec_control &= ~CPU_BASED_USE_IO_BITMAPS;
2046 exec_control |= CPU_BASED_UNCOND_IO_EXITING;
2047 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
2050 * SECONDARY EXEC CONTROLS
2052 if (cpu_has_secondary_exec_ctrls()) {
2053 exec_control = vmx->secondary_exec_control;
2055 /* Take the following fields only from vmcs12 */
2056 exec_control &= ~(SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
2057 SECONDARY_EXEC_ENABLE_INVPCID |
2058 SECONDARY_EXEC_RDTSCP |
2059 SECONDARY_EXEC_XSAVES |
2060 SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY |
2061 SECONDARY_EXEC_APIC_REGISTER_VIRT |
2062 SECONDARY_EXEC_ENABLE_VMFUNC);
2063 if (nested_cpu_has(vmcs12,
2064 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)) {
2065 vmcs12_exec_ctrl = vmcs12->secondary_vm_exec_control &
2066 ~SECONDARY_EXEC_ENABLE_PML;
2067 exec_control |= vmcs12_exec_ctrl;
2070 /* VMCS shadowing for L2 is emulated for now */
2071 exec_control &= ~SECONDARY_EXEC_SHADOW_VMCS;
2073 if (exec_control & SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY)
2074 vmcs_write16(GUEST_INTR_STATUS,
2075 vmcs12->guest_intr_status);
2078 * Write an illegal value to APIC_ACCESS_ADDR. Later,
2079 * nested_get_vmcs12_pages will either fix it up or
2080 * remove the VM execution control.
2082 if (exec_control & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)
2083 vmcs_write64(APIC_ACCESS_ADDR, -1ull);
2085 if (exec_control & SECONDARY_EXEC_ENCLS_EXITING)
2086 vmcs_write64(ENCLS_EXITING_BITMAP, -1ull);
2088 vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
2094 * vmcs12's VM_{ENTRY,EXIT}_LOAD_IA32_EFER and VM_ENTRY_IA32E_MODE
2095 * are emulated by vmx_set_efer() in prepare_vmcs02(), but speculate
2096 * on the related bits (if supported by the CPU) in the hope that
2097 * we can avoid VMWrites during vmx_set_efer().
2099 exec_control = (vmcs12->vm_entry_controls | vmx_vmentry_ctrl()) &
2100 ~VM_ENTRY_IA32E_MODE & ~VM_ENTRY_LOAD_IA32_EFER;
2101 if (cpu_has_load_ia32_efer()) {
2102 if (guest_efer & EFER_LMA)
2103 exec_control |= VM_ENTRY_IA32E_MODE;
2104 if (guest_efer != host_efer)
2105 exec_control |= VM_ENTRY_LOAD_IA32_EFER;
2107 vm_entry_controls_init(vmx, exec_control);
2112 * L2->L1 exit controls are emulated - the hardware exit is to L0 so
2113 * we should use its exit controls. Note that VM_EXIT_LOAD_IA32_EFER
2114 * bits may be modified by vmx_set_efer() in prepare_vmcs02().
2116 exec_control = vmx_vmexit_ctrl();
2117 if (cpu_has_load_ia32_efer() && guest_efer != host_efer)
2118 exec_control |= VM_EXIT_LOAD_IA32_EFER;
2119 vm_exit_controls_init(vmx, exec_control);
2122 * Conceptually we want to copy the PML address and index from
2123 * vmcs01 here, and then back to vmcs01 on nested vmexit. But,
2124 * since we always flush the log on each vmexit and never change
2125 * the PML address (once set), this happens to be equivalent to
2126 * simply resetting the index in vmcs02.
2129 vmcs_write16(GUEST_PML_INDEX, PML_ENTITY_NUM - 1);
2132 * Interrupt/Exception Fields
2134 if (vmx->nested.nested_run_pending) {
2135 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2136 vmcs12->vm_entry_intr_info_field);
2137 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE,
2138 vmcs12->vm_entry_exception_error_code);
2139 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
2140 vmcs12->vm_entry_instruction_len);
2141 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
2142 vmcs12->guest_interruptibility_info);
2143 vmx->loaded_vmcs->nmi_known_unmasked =
2144 !(vmcs12->guest_interruptibility_info & GUEST_INTR_STATE_NMI);
2146 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0);
2150 static void prepare_vmcs02_full(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
2152 struct hv_enlightened_vmcs *hv_evmcs = vmx->nested.hv_evmcs;
2154 if (!hv_evmcs || !(hv_evmcs->hv_clean_fields &
2155 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2)) {
2156 vmcs_write16(GUEST_ES_SELECTOR, vmcs12->guest_es_selector);
2157 vmcs_write16(GUEST_CS_SELECTOR, vmcs12->guest_cs_selector);
2158 vmcs_write16(GUEST_SS_SELECTOR, vmcs12->guest_ss_selector);
2159 vmcs_write16(GUEST_DS_SELECTOR, vmcs12->guest_ds_selector);
2160 vmcs_write16(GUEST_FS_SELECTOR, vmcs12->guest_fs_selector);
2161 vmcs_write16(GUEST_GS_SELECTOR, vmcs12->guest_gs_selector);
2162 vmcs_write16(GUEST_LDTR_SELECTOR, vmcs12->guest_ldtr_selector);
2163 vmcs_write16(GUEST_TR_SELECTOR, vmcs12->guest_tr_selector);
2164 vmcs_write32(GUEST_ES_LIMIT, vmcs12->guest_es_limit);
2165 vmcs_write32(GUEST_CS_LIMIT, vmcs12->guest_cs_limit);
2166 vmcs_write32(GUEST_SS_LIMIT, vmcs12->guest_ss_limit);
2167 vmcs_write32(GUEST_DS_LIMIT, vmcs12->guest_ds_limit);
2168 vmcs_write32(GUEST_FS_LIMIT, vmcs12->guest_fs_limit);
2169 vmcs_write32(GUEST_GS_LIMIT, vmcs12->guest_gs_limit);
2170 vmcs_write32(GUEST_LDTR_LIMIT, vmcs12->guest_ldtr_limit);
2171 vmcs_write32(GUEST_TR_LIMIT, vmcs12->guest_tr_limit);
2172 vmcs_write32(GUEST_GDTR_LIMIT, vmcs12->guest_gdtr_limit);
2173 vmcs_write32(GUEST_IDTR_LIMIT, vmcs12->guest_idtr_limit);
2174 vmcs_write32(GUEST_ES_AR_BYTES, vmcs12->guest_es_ar_bytes);
2175 vmcs_write32(GUEST_DS_AR_BYTES, vmcs12->guest_ds_ar_bytes);
2176 vmcs_write32(GUEST_FS_AR_BYTES, vmcs12->guest_fs_ar_bytes);
2177 vmcs_write32(GUEST_GS_AR_BYTES, vmcs12->guest_gs_ar_bytes);
2178 vmcs_write32(GUEST_LDTR_AR_BYTES, vmcs12->guest_ldtr_ar_bytes);
2179 vmcs_write32(GUEST_TR_AR_BYTES, vmcs12->guest_tr_ar_bytes);
2180 vmcs_writel(GUEST_ES_BASE, vmcs12->guest_es_base);
2181 vmcs_writel(GUEST_CS_BASE, vmcs12->guest_cs_base);
2182 vmcs_writel(GUEST_SS_BASE, vmcs12->guest_ss_base);
2183 vmcs_writel(GUEST_DS_BASE, vmcs12->guest_ds_base);
2184 vmcs_writel(GUEST_FS_BASE, vmcs12->guest_fs_base);
2185 vmcs_writel(GUEST_GS_BASE, vmcs12->guest_gs_base);
2186 vmcs_writel(GUEST_LDTR_BASE, vmcs12->guest_ldtr_base);
2187 vmcs_writel(GUEST_TR_BASE, vmcs12->guest_tr_base);
2188 vmcs_writel(GUEST_GDTR_BASE, vmcs12->guest_gdtr_base);
2189 vmcs_writel(GUEST_IDTR_BASE, vmcs12->guest_idtr_base);
2192 if (!hv_evmcs || !(hv_evmcs->hv_clean_fields &
2193 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1)) {
2194 vmcs_write32(GUEST_SYSENTER_CS, vmcs12->guest_sysenter_cs);
2195 vmcs_writel(GUEST_PENDING_DBG_EXCEPTIONS,
2196 vmcs12->guest_pending_dbg_exceptions);
2197 vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->guest_sysenter_esp);
2198 vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->guest_sysenter_eip);
2201 * L1 may access the L2's PDPTR, so save them to construct
2205 vmcs_write64(GUEST_PDPTR0, vmcs12->guest_pdptr0);
2206 vmcs_write64(GUEST_PDPTR1, vmcs12->guest_pdptr1);
2207 vmcs_write64(GUEST_PDPTR2, vmcs12->guest_pdptr2);
2208 vmcs_write64(GUEST_PDPTR3, vmcs12->guest_pdptr3);
2212 if (nested_cpu_has_xsaves(vmcs12))
2213 vmcs_write64(XSS_EXIT_BITMAP, vmcs12->xss_exit_bitmap);
2216 * Whether page-faults are trapped is determined by a combination of
2217 * 3 settings: PFEC_MASK, PFEC_MATCH and EXCEPTION_BITMAP.PF.
2218 * If enable_ept, L0 doesn't care about page faults and we should
2219 * set all of these to L1's desires. However, if !enable_ept, L0 does
2220 * care about (at least some) page faults, and because it is not easy
2221 * (if at all possible?) to merge L0 and L1's desires, we simply ask
2222 * to exit on each and every L2 page fault. This is done by setting
2223 * MASK=MATCH=0 and (see below) EB.PF=1.
2224 * Note that below we don't need special code to set EB.PF beyond the
2225 * "or"ing of the EB of vmcs01 and vmcs12, because when enable_ept,
2226 * vmcs01's EB.PF is 0 so the "or" will take vmcs12's value, and when
2227 * !enable_ept, EB.PF is 1, so the "or" will always be 1.
2229 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK,
2230 enable_ept ? vmcs12->page_fault_error_code_mask : 0);
2231 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH,
2232 enable_ept ? vmcs12->page_fault_error_code_match : 0);
2234 if (cpu_has_vmx_apicv()) {
2235 vmcs_write64(EOI_EXIT_BITMAP0, vmcs12->eoi_exit_bitmap0);
2236 vmcs_write64(EOI_EXIT_BITMAP1, vmcs12->eoi_exit_bitmap1);
2237 vmcs_write64(EOI_EXIT_BITMAP2, vmcs12->eoi_exit_bitmap2);
2238 vmcs_write64(EOI_EXIT_BITMAP3, vmcs12->eoi_exit_bitmap3);
2241 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, vmx->msr_autoload.host.nr);
2242 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, vmx->msr_autoload.guest.nr);
2244 set_cr4_guest_host_mask(vmx);
2246 if (kvm_mpx_supported()) {
2247 if (vmx->nested.nested_run_pending &&
2248 (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS))
2249 vmcs_write64(GUEST_BNDCFGS, vmcs12->guest_bndcfgs);
2251 vmcs_write64(GUEST_BNDCFGS, vmx->nested.vmcs01_guest_bndcfgs);
2256 * prepare_vmcs02 is called when the L1 guest hypervisor runs its nested
2257 * L2 guest. L1 has a vmcs for L2 (vmcs12), and this function "merges" it
2258 * with L0's requirements for its guest (a.k.a. vmcs01), so we can run the L2
2259 * guest in a way that will both be appropriate to L1's requests, and our
2260 * needs. In addition to modifying the active vmcs (which is vmcs02), this
2261 * function also has additional necessary side-effects, like setting various
2262 * vcpu->arch fields.
2263 * Returns 0 on success, 1 on failure. Invalid state exit qualification code
2264 * is assigned to entry_failure_code on failure.
2266 static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
2267 u32 *entry_failure_code)
2269 struct vcpu_vmx *vmx = to_vmx(vcpu);
2270 struct hv_enlightened_vmcs *hv_evmcs = vmx->nested.hv_evmcs;
2272 if (vmx->nested.dirty_vmcs12 || vmx->nested.hv_evmcs) {
2273 prepare_vmcs02_full(vmx, vmcs12);
2274 vmx->nested.dirty_vmcs12 = false;
2278 * First, the fields that are shadowed. This must be kept in sync
2279 * with vmcs_shadow_fields.h.
2281 if (!hv_evmcs || !(hv_evmcs->hv_clean_fields &
2282 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2)) {
2283 vmcs_write32(GUEST_CS_AR_BYTES, vmcs12->guest_cs_ar_bytes);
2284 vmcs_write32(GUEST_SS_AR_BYTES, vmcs12->guest_ss_ar_bytes);
2287 if (vmx->nested.nested_run_pending &&
2288 (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS)) {
2289 kvm_set_dr(vcpu, 7, vmcs12->guest_dr7);
2290 vmcs_write64(GUEST_IA32_DEBUGCTL, vmcs12->guest_ia32_debugctl);
2292 kvm_set_dr(vcpu, 7, vcpu->arch.dr7);
2293 vmcs_write64(GUEST_IA32_DEBUGCTL, vmx->nested.vmcs01_debugctl);
2295 vmx_set_rflags(vcpu, vmcs12->guest_rflags);
2297 /* EXCEPTION_BITMAP and CR0_GUEST_HOST_MASK should basically be the
2298 * bitwise-or of what L1 wants to trap for L2, and what we want to
2299 * trap. Note that CR0.TS also needs updating - we do this later.
2301 update_exception_bitmap(vcpu);
2302 vcpu->arch.cr0_guest_owned_bits &= ~vmcs12->cr0_guest_host_mask;
2303 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
2305 if (vmx->nested.nested_run_pending &&
2306 (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PAT)) {
2307 vmcs_write64(GUEST_IA32_PAT, vmcs12->guest_ia32_pat);
2308 vcpu->arch.pat = vmcs12->guest_ia32_pat;
2309 } else if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
2310 vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat);
2313 vmcs_write64(TSC_OFFSET, vcpu->arch.tsc_offset);
2315 if (kvm_has_tsc_control)
2316 decache_tsc_multiplier(vmx);
2320 * There is no direct mapping between vpid02 and vpid12, the
2321 * vpid02 is per-vCPU for L0 and reused while the value of
2322 * vpid12 is changed w/ one invvpid during nested vmentry.
2323 * The vpid12 is allocated by L1 for L2, so it will not
2324 * influence global bitmap(for vpid01 and vpid02 allocation)
2325 * even if spawn a lot of nested vCPUs.
2327 if (nested_cpu_has_vpid(vmcs12) && nested_has_guest_tlb_tag(vcpu)) {
2328 if (vmcs12->virtual_processor_id != vmx->nested.last_vpid) {
2329 vmx->nested.last_vpid = vmcs12->virtual_processor_id;
2330 __vmx_flush_tlb(vcpu, nested_get_vpid02(vcpu), false);
2334 * If L1 use EPT, then L0 needs to execute INVEPT on
2335 * EPTP02 instead of EPTP01. Therefore, delay TLB
2336 * flush until vmcs02->eptp is fully updated by
2337 * KVM_REQ_LOAD_CR3. Note that this assumes
2338 * KVM_REQ_TLB_FLUSH is evaluated after
2339 * KVM_REQ_LOAD_CR3 in vcpu_enter_guest().
2341 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
2345 if (nested_cpu_has_ept(vmcs12))
2346 nested_ept_init_mmu_context(vcpu);
2347 else if (nested_cpu_has2(vmcs12,
2348 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
2349 vmx_flush_tlb(vcpu, true);
2352 * This sets GUEST_CR0 to vmcs12->guest_cr0, possibly modifying those
2353 * bits which we consider mandatory enabled.
2354 * The CR0_READ_SHADOW is what L2 should have expected to read given
2355 * the specifications by L1; It's not enough to take
2356 * vmcs12->cr0_read_shadow because on our cr0_guest_host_mask we we
2357 * have more bits than L1 expected.
2359 vmx_set_cr0(vcpu, vmcs12->guest_cr0);
2360 vmcs_writel(CR0_READ_SHADOW, nested_read_cr0(vmcs12));
2362 vmx_set_cr4(vcpu, vmcs12->guest_cr4);
2363 vmcs_writel(CR4_READ_SHADOW, nested_read_cr4(vmcs12));
2365 vcpu->arch.efer = nested_vmx_calc_efer(vmx, vmcs12);
2366 /* Note: may modify VM_ENTRY/EXIT_CONTROLS and GUEST/HOST_IA32_EFER */
2367 vmx_set_efer(vcpu, vcpu->arch.efer);
2370 * Guest state is invalid and unrestricted guest is disabled,
2371 * which means L1 attempted VMEntry to L2 with invalid state.
2374 if (vmx->emulation_required) {
2375 *entry_failure_code = ENTRY_FAIL_DEFAULT;
2379 /* Shadow page tables on either EPT or shadow page tables. */
2380 if (nested_vmx_load_cr3(vcpu, vmcs12->guest_cr3, nested_cpu_has_ept(vmcs12),
2381 entry_failure_code))
2385 vcpu->arch.walk_mmu->inject_page_fault = vmx_inject_page_fault_nested;
2387 kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->guest_rsp);
2388 kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->guest_rip);
2392 static int nested_vmx_check_nmi_controls(struct vmcs12 *vmcs12)
2394 if (!nested_cpu_has_nmi_exiting(vmcs12) &&
2395 nested_cpu_has_virtual_nmis(vmcs12))
2398 if (!nested_cpu_has_virtual_nmis(vmcs12) &&
2399 nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_NMI_PENDING))
2405 static bool valid_ept_address(struct kvm_vcpu *vcpu, u64 address)
2407 struct vcpu_vmx *vmx = to_vmx(vcpu);
2408 int maxphyaddr = cpuid_maxphyaddr(vcpu);
2410 /* Check for memory type validity */
2411 switch (address & VMX_EPTP_MT_MASK) {
2412 case VMX_EPTP_MT_UC:
2413 if (!(vmx->nested.msrs.ept_caps & VMX_EPTP_UC_BIT))
2416 case VMX_EPTP_MT_WB:
2417 if (!(vmx->nested.msrs.ept_caps & VMX_EPTP_WB_BIT))
2424 /* only 4 levels page-walk length are valid */
2425 if ((address & VMX_EPTP_PWL_MASK) != VMX_EPTP_PWL_4)
2428 /* Reserved bits should not be set */
2429 if (address >> maxphyaddr || ((address >> 7) & 0x1f))
2432 /* AD, if set, should be supported */
2433 if (address & VMX_EPTP_AD_ENABLE_BIT) {
2434 if (!(vmx->nested.msrs.ept_caps & VMX_EPT_AD_BIT))
2442 * Checks related to VM-Execution Control Fields
2444 static int nested_check_vm_execution_controls(struct kvm_vcpu *vcpu,
2445 struct vmcs12 *vmcs12)
2447 struct vcpu_vmx *vmx = to_vmx(vcpu);
2449 if (!vmx_control_verify(vmcs12->pin_based_vm_exec_control,
2450 vmx->nested.msrs.pinbased_ctls_low,
2451 vmx->nested.msrs.pinbased_ctls_high) ||
2452 !vmx_control_verify(vmcs12->cpu_based_vm_exec_control,
2453 vmx->nested.msrs.procbased_ctls_low,
2454 vmx->nested.msrs.procbased_ctls_high))
2457 if (nested_cpu_has(vmcs12, CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) &&
2458 !vmx_control_verify(vmcs12->secondary_vm_exec_control,
2459 vmx->nested.msrs.secondary_ctls_low,
2460 vmx->nested.msrs.secondary_ctls_high))
2463 if (vmcs12->cr3_target_count > nested_cpu_vmx_misc_cr3_count(vcpu) ||
2464 nested_vmx_check_io_bitmap_controls(vcpu, vmcs12) ||
2465 nested_vmx_check_msr_bitmap_controls(vcpu, vmcs12) ||
2466 nested_vmx_check_tpr_shadow_controls(vcpu, vmcs12) ||
2467 nested_vmx_check_apic_access_controls(vcpu, vmcs12) ||
2468 nested_vmx_check_apicv_controls(vcpu, vmcs12) ||
2469 nested_vmx_check_nmi_controls(vmcs12) ||
2470 nested_vmx_check_pml_controls(vcpu, vmcs12) ||
2471 nested_vmx_check_unrestricted_guest_controls(vcpu, vmcs12) ||
2472 nested_vmx_check_mode_based_ept_exec_controls(vcpu, vmcs12) ||
2473 nested_vmx_check_shadow_vmcs_controls(vcpu, vmcs12) ||
2474 (nested_cpu_has_vpid(vmcs12) && !vmcs12->virtual_processor_id))
2477 if (!nested_cpu_has_preemption_timer(vmcs12) &&
2478 nested_cpu_has_save_preemption_timer(vmcs12))
2481 if (nested_cpu_has_ept(vmcs12) &&
2482 !valid_ept_address(vcpu, vmcs12->ept_pointer))
2485 if (nested_cpu_has_vmfunc(vmcs12)) {
2486 if (vmcs12->vm_function_control &
2487 ~vmx->nested.msrs.vmfunc_controls)
2490 if (nested_cpu_has_eptp_switching(vmcs12)) {
2491 if (!nested_cpu_has_ept(vmcs12) ||
2492 !page_address_valid(vcpu, vmcs12->eptp_list_address))
2501 * Checks related to VM-Exit Control Fields
2503 static int nested_check_vm_exit_controls(struct kvm_vcpu *vcpu,
2504 struct vmcs12 *vmcs12)
2506 struct vcpu_vmx *vmx = to_vmx(vcpu);
2508 if (!vmx_control_verify(vmcs12->vm_exit_controls,
2509 vmx->nested.msrs.exit_ctls_low,
2510 vmx->nested.msrs.exit_ctls_high) ||
2511 nested_vmx_check_exit_msr_switch_controls(vcpu, vmcs12))
2518 * Checks related to VM-Entry Control Fields
2520 static int nested_check_vm_entry_controls(struct kvm_vcpu *vcpu,
2521 struct vmcs12 *vmcs12)
2523 struct vcpu_vmx *vmx = to_vmx(vcpu);
2525 if (!vmx_control_verify(vmcs12->vm_entry_controls,
2526 vmx->nested.msrs.entry_ctls_low,
2527 vmx->nested.msrs.entry_ctls_high))
2531 * From the Intel SDM, volume 3:
2532 * Fields relevant to VM-entry event injection must be set properly.
2533 * These fields are the VM-entry interruption-information field, the
2534 * VM-entry exception error code, and the VM-entry instruction length.
2536 if (vmcs12->vm_entry_intr_info_field & INTR_INFO_VALID_MASK) {
2537 u32 intr_info = vmcs12->vm_entry_intr_info_field;
2538 u8 vector = intr_info & INTR_INFO_VECTOR_MASK;
2539 u32 intr_type = intr_info & INTR_INFO_INTR_TYPE_MASK;
2540 bool has_error_code = intr_info & INTR_INFO_DELIVER_CODE_MASK;
2541 bool should_have_error_code;
2542 bool urg = nested_cpu_has2(vmcs12,
2543 SECONDARY_EXEC_UNRESTRICTED_GUEST);
2544 bool prot_mode = !urg || vmcs12->guest_cr0 & X86_CR0_PE;
2546 /* VM-entry interruption-info field: interruption type */
2547 if (intr_type == INTR_TYPE_RESERVED ||
2548 (intr_type == INTR_TYPE_OTHER_EVENT &&
2549 !nested_cpu_supports_monitor_trap_flag(vcpu)))
2552 /* VM-entry interruption-info field: vector */
2553 if ((intr_type == INTR_TYPE_NMI_INTR && vector != NMI_VECTOR) ||
2554 (intr_type == INTR_TYPE_HARD_EXCEPTION && vector > 31) ||
2555 (intr_type == INTR_TYPE_OTHER_EVENT && vector != 0))
2558 /* VM-entry interruption-info field: deliver error code */
2559 should_have_error_code =
2560 intr_type == INTR_TYPE_HARD_EXCEPTION && prot_mode &&
2561 x86_exception_has_error_code(vector);
2562 if (has_error_code != should_have_error_code)
2565 /* VM-entry exception error code */
2566 if (has_error_code &&
2567 vmcs12->vm_entry_exception_error_code & GENMASK(31, 15))
2570 /* VM-entry interruption-info field: reserved bits */
2571 if (intr_info & INTR_INFO_RESVD_BITS_MASK)
2574 /* VM-entry instruction length */
2575 switch (intr_type) {
2576 case INTR_TYPE_SOFT_EXCEPTION:
2577 case INTR_TYPE_SOFT_INTR:
2578 case INTR_TYPE_PRIV_SW_EXCEPTION:
2579 if ((vmcs12->vm_entry_instruction_len > 15) ||
2580 (vmcs12->vm_entry_instruction_len == 0 &&
2581 !nested_cpu_has_zero_length_injection(vcpu)))
2586 if (nested_vmx_check_entry_msr_switch_controls(vcpu, vmcs12))
2593 * Checks related to Host Control Registers and MSRs
2595 static int nested_check_host_control_regs(struct kvm_vcpu *vcpu,
2596 struct vmcs12 *vmcs12)
2600 if (!nested_host_cr0_valid(vcpu, vmcs12->host_cr0) ||
2601 !nested_host_cr4_valid(vcpu, vmcs12->host_cr4) ||
2602 !nested_cr3_valid(vcpu, vmcs12->host_cr3))
2605 if (is_noncanonical_address(vmcs12->host_ia32_sysenter_esp, vcpu) ||
2606 is_noncanonical_address(vmcs12->host_ia32_sysenter_eip, vcpu))
2610 * If the load IA32_EFER VM-exit control is 1, bits reserved in the
2611 * IA32_EFER MSR must be 0 in the field for that register. In addition,
2612 * the values of the LMA and LME bits in the field must each be that of
2613 * the host address-space size VM-exit control.
2615 if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER) {
2616 ia32e = (vmcs12->vm_exit_controls &
2617 VM_EXIT_HOST_ADDR_SPACE_SIZE) != 0;
2618 if (!kvm_valid_efer(vcpu, vmcs12->host_ia32_efer) ||
2619 ia32e != !!(vmcs12->host_ia32_efer & EFER_LMA) ||
2620 ia32e != !!(vmcs12->host_ia32_efer & EFER_LME))
2628 * Checks related to Guest Non-register State
2630 static int nested_check_guest_non_reg_state(struct vmcs12 *vmcs12)
2632 if (vmcs12->guest_activity_state != GUEST_ACTIVITY_ACTIVE &&
2633 vmcs12->guest_activity_state != GUEST_ACTIVITY_HLT)
2639 static int nested_vmx_check_vmentry_prereqs(struct kvm_vcpu *vcpu,
2640 struct vmcs12 *vmcs12)
2642 if (nested_check_vm_execution_controls(vcpu, vmcs12) ||
2643 nested_check_vm_exit_controls(vcpu, vmcs12) ||
2644 nested_check_vm_entry_controls(vcpu, vmcs12))
2645 return VMXERR_ENTRY_INVALID_CONTROL_FIELD;
2647 if (nested_check_host_control_regs(vcpu, vmcs12))
2648 return VMXERR_ENTRY_INVALID_HOST_STATE_FIELD;
2650 if (nested_check_guest_non_reg_state(vmcs12))
2651 return VMXERR_ENTRY_INVALID_CONTROL_FIELD;
2656 static int nested_vmx_check_vmcs_link_ptr(struct kvm_vcpu *vcpu,
2657 struct vmcs12 *vmcs12)
2661 struct vmcs12 *shadow;
2663 if (vmcs12->vmcs_link_pointer == -1ull)
2666 if (!page_address_valid(vcpu, vmcs12->vmcs_link_pointer))
2669 page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->vmcs_link_pointer);
2670 if (is_error_page(page))
2674 shadow = kmap(page);
2675 if (shadow->hdr.revision_id != VMCS12_REVISION ||
2676 shadow->hdr.shadow_vmcs != nested_cpu_has_shadow_vmcs(vmcs12))
2679 kvm_release_page_clean(page);
2683 static int nested_vmx_check_vmentry_postreqs(struct kvm_vcpu *vcpu,
2684 struct vmcs12 *vmcs12,
2689 *exit_qual = ENTRY_FAIL_DEFAULT;
2691 if (!nested_guest_cr0_valid(vcpu, vmcs12->guest_cr0) ||
2692 !nested_guest_cr4_valid(vcpu, vmcs12->guest_cr4))
2695 if (nested_vmx_check_vmcs_link_ptr(vcpu, vmcs12)) {
2696 *exit_qual = ENTRY_FAIL_VMCS_LINK_PTR;
2701 * If the load IA32_EFER VM-entry control is 1, the following checks
2702 * are performed on the field for the IA32_EFER MSR:
2703 * - Bits reserved in the IA32_EFER MSR must be 0.
2704 * - Bit 10 (corresponding to IA32_EFER.LMA) must equal the value of
2705 * the IA-32e mode guest VM-exit control. It must also be identical
2706 * to bit 8 (LME) if bit 31 in the CR0 field (corresponding to
2709 if (to_vmx(vcpu)->nested.nested_run_pending &&
2710 (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_EFER)) {
2711 ia32e = (vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE) != 0;
2712 if (!kvm_valid_efer(vcpu, vmcs12->guest_ia32_efer) ||
2713 ia32e != !!(vmcs12->guest_ia32_efer & EFER_LMA) ||
2714 ((vmcs12->guest_cr0 & X86_CR0_PG) &&
2715 ia32e != !!(vmcs12->guest_ia32_efer & EFER_LME)))
2719 if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS) &&
2720 (is_noncanonical_address(vmcs12->guest_bndcfgs & PAGE_MASK, vcpu) ||
2721 (vmcs12->guest_bndcfgs & MSR_IA32_BNDCFGS_RSVD)))
2727 static int nested_vmx_check_vmentry_hw(struct kvm_vcpu *vcpu)
2729 struct vcpu_vmx *vmx = to_vmx(vcpu);
2730 unsigned long cr3, cr4;
2733 if (!nested_early_check)
2736 if (vmx->msr_autoload.host.nr)
2737 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
2738 if (vmx->msr_autoload.guest.nr)
2739 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
2743 vmx_prepare_switch_to_guest(vcpu);
2746 * Induce a consistency check VMExit by clearing bit 1 in GUEST_RFLAGS,
2747 * which is reserved to '1' by hardware. GUEST_RFLAGS is guaranteed to
2748 * be written (by preparve_vmcs02()) before the "real" VMEnter, i.e.
2749 * there is no need to preserve other bits or save/restore the field.
2751 vmcs_writel(GUEST_RFLAGS, 0);
2753 cr3 = __get_current_cr3_fast();
2754 if (unlikely(cr3 != vmx->loaded_vmcs->host_state.cr3)) {
2755 vmcs_writel(HOST_CR3, cr3);
2756 vmx->loaded_vmcs->host_state.cr3 = cr3;
2759 cr4 = cr4_read_shadow();
2760 if (unlikely(cr4 != vmx->loaded_vmcs->host_state.cr4)) {
2761 vmcs_writel(HOST_CR4, cr4);
2762 vmx->loaded_vmcs->host_state.cr4 = cr4;
2766 "sub $%c[wordsize], %%" _ASM_SP "\n\t" /* temporarily adjust RSP for CALL */
2767 "cmp %%" _ASM_SP ", %c[host_state_rsp](%[loaded_vmcs]) \n\t"
2769 __ex("vmwrite %%" _ASM_SP ", %[HOST_RSP]") "\n\t"
2770 "mov %%" _ASM_SP ", %c[host_state_rsp](%[loaded_vmcs]) \n\t"
2772 "add $%c[wordsize], %%" _ASM_SP "\n\t" /* un-adjust RSP */
2774 /* Check if vmlaunch or vmresume is needed */
2775 "cmpb $0, %c[launched](%[loaded_vmcs])\n\t"
2778 * VMLAUNCH and VMRESUME clear RFLAGS.{CF,ZF} on VM-Exit, set
2779 * RFLAGS.CF on VM-Fail Invalid and set RFLAGS.ZF on VM-Fail
2780 * Valid. vmx_vmenter() directly "returns" RFLAGS, and so the
2781 * results of VM-Enter is captured via CC_{SET,OUT} to vm_fail.
2783 "call vmx_vmenter\n\t"
2786 : ASM_CALL_CONSTRAINT, CC_OUT(be) (vm_fail)
2787 : [HOST_RSP]"r"((unsigned long)HOST_RSP),
2788 [loaded_vmcs]"r"(vmx->loaded_vmcs),
2789 [launched]"i"(offsetof(struct loaded_vmcs, launched)),
2790 [host_state_rsp]"i"(offsetof(struct loaded_vmcs, host_state.rsp)),
2791 [wordsize]"i"(sizeof(ulong))
2797 if (vmx->msr_autoload.host.nr)
2798 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, vmx->msr_autoload.host.nr);
2799 if (vmx->msr_autoload.guest.nr)
2800 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, vmx->msr_autoload.guest.nr);
2803 WARN_ON_ONCE(vmcs_read32(VM_INSTRUCTION_ERROR) !=
2804 VMXERR_ENTRY_INVALID_CONTROL_FIELD);
2809 * VMExit clears RFLAGS.IF and DR7, even on a consistency check.
2812 if (hw_breakpoint_active())
2813 set_debugreg(__this_cpu_read(cpu_dr7), 7);
2816 * A non-failing VMEntry means we somehow entered guest mode with
2817 * an illegal RIP, and that's just the tip of the iceberg. There
2818 * is no telling what memory has been modified or what state has
2819 * been exposed to unknown code. Hitting this all but guarantees
2820 * a (very critical) hardware issue.
2822 WARN_ON(!(vmcs_read32(VM_EXIT_REASON) &
2823 VMX_EXIT_REASONS_FAILED_VMENTRY));
2828 static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu,
2829 struct vmcs12 *vmcs12);
2831 static void nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
2833 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
2834 struct vcpu_vmx *vmx = to_vmx(vcpu);
2838 if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) {
2840 * Translate L1 physical address to host physical
2841 * address for vmcs02. Keep the page pinned, so this
2842 * physical address remains valid. We keep a reference
2843 * to it so we can release it later.
2845 if (vmx->nested.apic_access_page) { /* shouldn't happen */
2846 kvm_release_page_dirty(vmx->nested.apic_access_page);
2847 vmx->nested.apic_access_page = NULL;
2849 page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->apic_access_addr);
2851 * If translation failed, no matter: This feature asks
2852 * to exit when accessing the given address, and if it
2853 * can never be accessed, this feature won't do
2856 if (!is_error_page(page)) {
2857 vmx->nested.apic_access_page = page;
2858 hpa = page_to_phys(vmx->nested.apic_access_page);
2859 vmcs_write64(APIC_ACCESS_ADDR, hpa);
2861 vmcs_clear_bits(SECONDARY_VM_EXEC_CONTROL,
2862 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES);
2866 if (nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) {
2867 if (vmx->nested.virtual_apic_page) { /* shouldn't happen */
2868 kvm_release_page_dirty(vmx->nested.virtual_apic_page);
2869 vmx->nested.virtual_apic_page = NULL;
2871 page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->virtual_apic_page_addr);
2874 * If translation failed, VM entry will fail because
2875 * prepare_vmcs02 set VIRTUAL_APIC_PAGE_ADDR to -1ull.
2876 * Failing the vm entry is _not_ what the processor
2877 * does but it's basically the only possibility we
2878 * have. We could still enter the guest if CR8 load
2879 * exits are enabled, CR8 store exits are enabled, and
2880 * virtualize APIC access is disabled; in this case
2881 * the processor would never use the TPR shadow and we
2882 * could simply clear the bit from the execution
2883 * control. But such a configuration is useless, so
2884 * let's keep the code simple.
2886 if (!is_error_page(page)) {
2887 vmx->nested.virtual_apic_page = page;
2888 hpa = page_to_phys(vmx->nested.virtual_apic_page);
2889 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, hpa);
2893 if (nested_cpu_has_posted_intr(vmcs12)) {
2894 if (vmx->nested.pi_desc_page) { /* shouldn't happen */
2895 kunmap(vmx->nested.pi_desc_page);
2896 kvm_release_page_dirty(vmx->nested.pi_desc_page);
2897 vmx->nested.pi_desc_page = NULL;
2898 vmx->nested.pi_desc = NULL;
2899 vmcs_write64(POSTED_INTR_DESC_ADDR, -1ull);
2901 page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->posted_intr_desc_addr);
2902 if (is_error_page(page))
2904 vmx->nested.pi_desc_page = page;
2905 vmx->nested.pi_desc = kmap(vmx->nested.pi_desc_page);
2906 vmx->nested.pi_desc =
2907 (struct pi_desc *)((void *)vmx->nested.pi_desc +
2908 (unsigned long)(vmcs12->posted_intr_desc_addr &
2910 vmcs_write64(POSTED_INTR_DESC_ADDR,
2911 page_to_phys(vmx->nested.pi_desc_page) +
2912 (unsigned long)(vmcs12->posted_intr_desc_addr &
2915 if (nested_vmx_prepare_msr_bitmap(vcpu, vmcs12))
2916 vmcs_set_bits(CPU_BASED_VM_EXEC_CONTROL,
2917 CPU_BASED_USE_MSR_BITMAPS);
2919 vmcs_clear_bits(CPU_BASED_VM_EXEC_CONTROL,
2920 CPU_BASED_USE_MSR_BITMAPS);
2924 * Intel's VMX Instruction Reference specifies a common set of prerequisites
2925 * for running VMX instructions (except VMXON, whose prerequisites are
2926 * slightly different). It also specifies what exception to inject otherwise.
2927 * Note that many of these exceptions have priority over VM exits, so they
2928 * don't have to be checked again here.
2930 static int nested_vmx_check_permission(struct kvm_vcpu *vcpu)
2932 if (!to_vmx(vcpu)->nested.vmxon) {
2933 kvm_queue_exception(vcpu, UD_VECTOR);
2937 if (vmx_get_cpl(vcpu)) {
2938 kvm_inject_gp(vcpu, 0);
2945 static u8 vmx_has_apicv_interrupt(struct kvm_vcpu *vcpu)
2947 u8 rvi = vmx_get_rvi();
2948 u8 vppr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_PROCPRI);
2950 return ((rvi & 0xf0) > (vppr & 0xf0));
2953 static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
2954 struct vmcs12 *vmcs12);
2957 * If from_vmentry is false, this is being called from state restore (either RSM
2958 * or KVM_SET_NESTED_STATE). Otherwise it's called from vmlaunch/vmresume.
2961 + * 0 - success, i.e. proceed with actual VMEnter
2962 + * 1 - consistency check VMExit
2963 + * -1 - consistency check VMFail
2965 int nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu, bool from_vmentry)
2967 struct vcpu_vmx *vmx = to_vmx(vcpu);
2968 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
2969 bool evaluate_pending_interrupts;
2970 u32 exit_reason = EXIT_REASON_INVALID_STATE;
2973 evaluate_pending_interrupts = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
2974 (CPU_BASED_VIRTUAL_INTR_PENDING | CPU_BASED_VIRTUAL_NMI_PENDING);
2975 if (likely(!evaluate_pending_interrupts) && kvm_vcpu_apicv_active(vcpu))
2976 evaluate_pending_interrupts |= vmx_has_apicv_interrupt(vcpu);
2978 if (!(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS))
2979 vmx->nested.vmcs01_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL);
2980 if (kvm_mpx_supported() &&
2981 !(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS))
2982 vmx->nested.vmcs01_guest_bndcfgs = vmcs_read64(GUEST_BNDCFGS);
2984 vmx_switch_vmcs(vcpu, &vmx->nested.vmcs02);
2986 prepare_vmcs02_early(vmx, vmcs12);
2989 nested_get_vmcs12_pages(vcpu);
2991 if (nested_vmx_check_vmentry_hw(vcpu)) {
2992 vmx_switch_vmcs(vcpu, &vmx->vmcs01);
2996 if (nested_vmx_check_vmentry_postreqs(vcpu, vmcs12, &exit_qual))
2997 goto vmentry_fail_vmexit;
3000 enter_guest_mode(vcpu);
3001 if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
3002 vcpu->arch.tsc_offset += vmcs12->tsc_offset;
3004 if (prepare_vmcs02(vcpu, vmcs12, &exit_qual))
3005 goto vmentry_fail_vmexit_guest_mode;
3008 exit_reason = EXIT_REASON_MSR_LOAD_FAIL;
3009 exit_qual = nested_vmx_load_msr(vcpu,
3010 vmcs12->vm_entry_msr_load_addr,
3011 vmcs12->vm_entry_msr_load_count);
3013 goto vmentry_fail_vmexit_guest_mode;
3016 * The MMU is not initialized to point at the right entities yet and
3017 * "get pages" would need to read data from the guest (i.e. we will
3018 * need to perform gpa to hpa translation). Request a call
3019 * to nested_get_vmcs12_pages before the next VM-entry. The MSRs
3020 * have already been set at vmentry time and should not be reset.
3022 kvm_make_request(KVM_REQ_GET_VMCS12_PAGES, vcpu);
3026 * If L1 had a pending IRQ/NMI until it executed
3027 * VMLAUNCH/VMRESUME which wasn't delivered because it was
3028 * disallowed (e.g. interrupts disabled), L0 needs to
3029 * evaluate if this pending event should cause an exit from L2
3030 * to L1 or delivered directly to L2 (e.g. In case L1 don't
3031 * intercept EXTERNAL_INTERRUPT).
3033 * Usually this would be handled by the processor noticing an
3034 * IRQ/NMI window request, or checking RVI during evaluation of
3035 * pending virtual interrupts. However, this setting was done
3036 * on VMCS01 and now VMCS02 is active instead. Thus, we force L0
3037 * to perform pending event evaluation by requesting a KVM_REQ_EVENT.
3039 if (unlikely(evaluate_pending_interrupts))
3040 kvm_make_request(KVM_REQ_EVENT, vcpu);
3043 * Do not start the preemption timer hrtimer until after we know
3044 * we are successful, so that only nested_vmx_vmexit needs to cancel
3047 vmx->nested.preemption_timer_expired = false;
3048 if (nested_cpu_has_preemption_timer(vmcs12))
3049 vmx_start_preemption_timer(vcpu);
3052 * Note no nested_vmx_succeed or nested_vmx_fail here. At this point
3053 * we are no longer running L1, and VMLAUNCH/VMRESUME has not yet
3054 * returned as far as L1 is concerned. It will only return (and set
3055 * the success flag) when L2 exits (see nested_vmx_vmexit()).
3060 * A failed consistency check that leads to a VMExit during L1's
3061 * VMEnter to L2 is a variation of a normal VMexit, as explained in
3062 * 26.7 "VM-entry failures during or after loading guest state".
3064 vmentry_fail_vmexit_guest_mode:
3065 if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
3066 vcpu->arch.tsc_offset -= vmcs12->tsc_offset;
3067 leave_guest_mode(vcpu);
3069 vmentry_fail_vmexit:
3070 vmx_switch_vmcs(vcpu, &vmx->vmcs01);
3075 load_vmcs12_host_state(vcpu, vmcs12);
3076 vmcs12->vm_exit_reason = exit_reason | VMX_EXIT_REASONS_FAILED_VMENTRY;
3077 vmcs12->exit_qualification = exit_qual;
3078 if (enable_shadow_vmcs || vmx->nested.hv_evmcs)
3079 vmx->nested.need_vmcs12_sync = true;
3084 * nested_vmx_run() handles a nested entry, i.e., a VMLAUNCH or VMRESUME on L1
3085 * for running an L2 nested guest.
3087 static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
3089 struct vmcs12 *vmcs12;
3090 struct vcpu_vmx *vmx = to_vmx(vcpu);
3091 u32 interrupt_shadow = vmx_get_interrupt_shadow(vcpu);
3094 if (!nested_vmx_check_permission(vcpu))
3097 if (!nested_vmx_handle_enlightened_vmptrld(vcpu, true))
3100 if (!vmx->nested.hv_evmcs && vmx->nested.current_vmptr == -1ull)
3101 return nested_vmx_failInvalid(vcpu);
3103 vmcs12 = get_vmcs12(vcpu);
3106 * Can't VMLAUNCH or VMRESUME a shadow VMCS. Despite the fact
3107 * that there *is* a valid VMCS pointer, RFLAGS.CF is set
3108 * rather than RFLAGS.ZF, and no error number is stored to the
3109 * VM-instruction error field.
3111 if (vmcs12->hdr.shadow_vmcs)
3112 return nested_vmx_failInvalid(vcpu);
3114 if (vmx->nested.hv_evmcs) {
3115 copy_enlightened_to_vmcs12(vmx);
3116 /* Enlightened VMCS doesn't have launch state */
3117 vmcs12->launch_state = !launch;
3118 } else if (enable_shadow_vmcs) {
3119 copy_shadow_to_vmcs12(vmx);
3123 * The nested entry process starts with enforcing various prerequisites
3124 * on vmcs12 as required by the Intel SDM, and act appropriately when
3125 * they fail: As the SDM explains, some conditions should cause the
3126 * instruction to fail, while others will cause the instruction to seem
3127 * to succeed, but return an EXIT_REASON_INVALID_STATE.
3128 * To speed up the normal (success) code path, we should avoid checking
3129 * for misconfigurations which will anyway be caught by the processor
3130 * when using the merged vmcs02.
3132 if (interrupt_shadow & KVM_X86_SHADOW_INT_MOV_SS)
3133 return nested_vmx_failValid(vcpu,
3134 VMXERR_ENTRY_EVENTS_BLOCKED_BY_MOV_SS);
3136 if (vmcs12->launch_state == launch)
3137 return nested_vmx_failValid(vcpu,
3138 launch ? VMXERR_VMLAUNCH_NONCLEAR_VMCS
3139 : VMXERR_VMRESUME_NONLAUNCHED_VMCS);
3141 ret = nested_vmx_check_vmentry_prereqs(vcpu, vmcs12);
3143 return nested_vmx_failValid(vcpu, ret);
3146 * We're finally done with prerequisite checking, and can start with
3149 vmx->nested.nested_run_pending = 1;
3150 ret = nested_vmx_enter_non_root_mode(vcpu, true);
3151 vmx->nested.nested_run_pending = !ret;
3155 return nested_vmx_failValid(vcpu,
3156 VMXERR_ENTRY_INVALID_CONTROL_FIELD);
3158 /* Hide L1D cache contents from the nested guest. */
3159 vmx->vcpu.arch.l1tf_flush_l1d = true;
3162 * Must happen outside of nested_vmx_enter_non_root_mode() as it will
3163 * also be used as part of restoring nVMX state for
3164 * snapshot restore (migration).
3166 * In this flow, it is assumed that vmcs12 cache was
3167 * trasferred as part of captured nVMX state and should
3168 * therefore not be read from guest memory (which may not
3169 * exist on destination host yet).
3171 nested_cache_shadow_vmcs12(vcpu, vmcs12);
3174 * If we're entering a halted L2 vcpu and the L2 vcpu won't be
3175 * awakened by event injection or by an NMI-window VM-exit or
3176 * by an interrupt-window VM-exit, halt the vcpu.
3178 if ((vmcs12->guest_activity_state == GUEST_ACTIVITY_HLT) &&
3179 !(vmcs12->vm_entry_intr_info_field & INTR_INFO_VALID_MASK) &&
3180 !(vmcs12->cpu_based_vm_exec_control & CPU_BASED_VIRTUAL_NMI_PENDING) &&
3181 !((vmcs12->cpu_based_vm_exec_control & CPU_BASED_VIRTUAL_INTR_PENDING) &&
3182 (vmcs12->guest_rflags & X86_EFLAGS_IF))) {
3183 vmx->nested.nested_run_pending = 0;
3184 return kvm_vcpu_halt(vcpu);
3190 * On a nested exit from L2 to L1, vmcs12.guest_cr0 might not be up-to-date
3191 * because L2 may have changed some cr0 bits directly (CRO_GUEST_HOST_MASK).
3192 * This function returns the new value we should put in vmcs12.guest_cr0.
3193 * It's not enough to just return the vmcs02 GUEST_CR0. Rather,
3194 * 1. Bits that neither L0 nor L1 trapped, were set directly by L2 and are now
3195 * available in vmcs02 GUEST_CR0. (Note: It's enough to check that L0
3196 * didn't trap the bit, because if L1 did, so would L0).
3197 * 2. Bits that L1 asked to trap (and therefore L0 also did) could not have
3198 * been modified by L2, and L1 knows it. So just leave the old value of
3199 * the bit from vmcs12.guest_cr0. Note that the bit from vmcs02 GUEST_CR0
3200 * isn't relevant, because if L0 traps this bit it can set it to anything.
3201 * 3. Bits that L1 didn't trap, but L0 did. L1 believes the guest could have
3202 * changed these bits, and therefore they need to be updated, but L0
3203 * didn't necessarily allow them to be changed in GUEST_CR0 - and rather
3204 * put them in vmcs02 CR0_READ_SHADOW. So take these bits from there.
3206 static inline unsigned long
3207 vmcs12_guest_cr0(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
3210 /*1*/ (vmcs_readl(GUEST_CR0) & vcpu->arch.cr0_guest_owned_bits) |
3211 /*2*/ (vmcs12->guest_cr0 & vmcs12->cr0_guest_host_mask) |
3212 /*3*/ (vmcs_readl(CR0_READ_SHADOW) & ~(vmcs12->cr0_guest_host_mask |
3213 vcpu->arch.cr0_guest_owned_bits));
3216 static inline unsigned long
3217 vmcs12_guest_cr4(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
3220 /*1*/ (vmcs_readl(GUEST_CR4) & vcpu->arch.cr4_guest_owned_bits) |
3221 /*2*/ (vmcs12->guest_cr4 & vmcs12->cr4_guest_host_mask) |
3222 /*3*/ (vmcs_readl(CR4_READ_SHADOW) & ~(vmcs12->cr4_guest_host_mask |
3223 vcpu->arch.cr4_guest_owned_bits));
3226 static void vmcs12_save_pending_event(struct kvm_vcpu *vcpu,
3227 struct vmcs12 *vmcs12)
3232 if (vcpu->arch.exception.injected) {
3233 nr = vcpu->arch.exception.nr;
3234 idt_vectoring = nr | VECTORING_INFO_VALID_MASK;
3236 if (kvm_exception_is_soft(nr)) {
3237 vmcs12->vm_exit_instruction_len =
3238 vcpu->arch.event_exit_inst_len;
3239 idt_vectoring |= INTR_TYPE_SOFT_EXCEPTION;
3241 idt_vectoring |= INTR_TYPE_HARD_EXCEPTION;
3243 if (vcpu->arch.exception.has_error_code) {
3244 idt_vectoring |= VECTORING_INFO_DELIVER_CODE_MASK;
3245 vmcs12->idt_vectoring_error_code =
3246 vcpu->arch.exception.error_code;
3249 vmcs12->idt_vectoring_info_field = idt_vectoring;
3250 } else if (vcpu->arch.nmi_injected) {
3251 vmcs12->idt_vectoring_info_field =
3252 INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR;
3253 } else if (vcpu->arch.interrupt.injected) {
3254 nr = vcpu->arch.interrupt.nr;
3255 idt_vectoring = nr | VECTORING_INFO_VALID_MASK;
3257 if (vcpu->arch.interrupt.soft) {
3258 idt_vectoring |= INTR_TYPE_SOFT_INTR;
3259 vmcs12->vm_entry_instruction_len =
3260 vcpu->arch.event_exit_inst_len;
3262 idt_vectoring |= INTR_TYPE_EXT_INTR;
3264 vmcs12->idt_vectoring_info_field = idt_vectoring;
3269 static void nested_mark_vmcs12_pages_dirty(struct kvm_vcpu *vcpu)
3271 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
3275 * Don't need to mark the APIC access page dirty; it is never
3276 * written to by the CPU during APIC virtualization.
3279 if (nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) {
3280 gfn = vmcs12->virtual_apic_page_addr >> PAGE_SHIFT;
3281 kvm_vcpu_mark_page_dirty(vcpu, gfn);
3284 if (nested_cpu_has_posted_intr(vmcs12)) {
3285 gfn = vmcs12->posted_intr_desc_addr >> PAGE_SHIFT;
3286 kvm_vcpu_mark_page_dirty(vcpu, gfn);
3290 static void vmx_complete_nested_posted_interrupt(struct kvm_vcpu *vcpu)
3292 struct vcpu_vmx *vmx = to_vmx(vcpu);
3297 if (!vmx->nested.pi_desc || !vmx->nested.pi_pending)
3300 vmx->nested.pi_pending = false;
3301 if (!pi_test_and_clear_on(vmx->nested.pi_desc))
3304 max_irr = find_last_bit((unsigned long *)vmx->nested.pi_desc->pir, 256);
3305 if (max_irr != 256) {
3306 vapic_page = kmap(vmx->nested.virtual_apic_page);
3307 __kvm_apic_update_irr(vmx->nested.pi_desc->pir,
3308 vapic_page, &max_irr);
3309 kunmap(vmx->nested.virtual_apic_page);
3311 status = vmcs_read16(GUEST_INTR_STATUS);
3312 if ((u8)max_irr > ((u8)status & 0xff)) {
3314 status |= (u8)max_irr;
3315 vmcs_write16(GUEST_INTR_STATUS, status);
3319 nested_mark_vmcs12_pages_dirty(vcpu);
3322 static void nested_vmx_inject_exception_vmexit(struct kvm_vcpu *vcpu,
3323 unsigned long exit_qual)
3325 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
3326 unsigned int nr = vcpu->arch.exception.nr;
3327 u32 intr_info = nr | INTR_INFO_VALID_MASK;
3329 if (vcpu->arch.exception.has_error_code) {
3330 vmcs12->vm_exit_intr_error_code = vcpu->arch.exception.error_code;
3331 intr_info |= INTR_INFO_DELIVER_CODE_MASK;
3334 if (kvm_exception_is_soft(nr))
3335 intr_info |= INTR_TYPE_SOFT_EXCEPTION;
3337 intr_info |= INTR_TYPE_HARD_EXCEPTION;
3339 if (!(vmcs12->idt_vectoring_info_field & VECTORING_INFO_VALID_MASK) &&
3340 vmx_get_nmi_mask(vcpu))
3341 intr_info |= INTR_INFO_UNBLOCK_NMI;
3343 nested_vmx_vmexit(vcpu, EXIT_REASON_EXCEPTION_NMI, intr_info, exit_qual);
3346 static int vmx_check_nested_events(struct kvm_vcpu *vcpu, bool external_intr)
3348 struct vcpu_vmx *vmx = to_vmx(vcpu);
3349 unsigned long exit_qual;
3350 bool block_nested_events =
3351 vmx->nested.nested_run_pending || kvm_event_needs_reinjection(vcpu);
3353 if (vcpu->arch.exception.pending &&
3354 nested_vmx_check_exception(vcpu, &exit_qual)) {
3355 if (block_nested_events)
3357 nested_vmx_inject_exception_vmexit(vcpu, exit_qual);
3361 if (nested_cpu_has_preemption_timer(get_vmcs12(vcpu)) &&
3362 vmx->nested.preemption_timer_expired) {
3363 if (block_nested_events)
3365 nested_vmx_vmexit(vcpu, EXIT_REASON_PREEMPTION_TIMER, 0, 0);
3369 if (vcpu->arch.nmi_pending && nested_exit_on_nmi(vcpu)) {
3370 if (block_nested_events)
3372 nested_vmx_vmexit(vcpu, EXIT_REASON_EXCEPTION_NMI,
3373 NMI_VECTOR | INTR_TYPE_NMI_INTR |
3374 INTR_INFO_VALID_MASK, 0);
3376 * The NMI-triggered VM exit counts as injection:
3377 * clear this one and block further NMIs.
3379 vcpu->arch.nmi_pending = 0;
3380 vmx_set_nmi_mask(vcpu, true);
3384 if ((kvm_cpu_has_interrupt(vcpu) || external_intr) &&
3385 nested_exit_on_intr(vcpu)) {
3386 if (block_nested_events)
3388 nested_vmx_vmexit(vcpu, EXIT_REASON_EXTERNAL_INTERRUPT, 0, 0);
3392 vmx_complete_nested_posted_interrupt(vcpu);
3396 static u32 vmx_get_preemption_timer_value(struct kvm_vcpu *vcpu)
3399 hrtimer_get_remaining(&to_vmx(vcpu)->nested.preemption_timer);
3402 if (ktime_to_ns(remaining) <= 0)
3405 value = ktime_to_ns(remaining) * vcpu->arch.virtual_tsc_khz;
3406 do_div(value, 1000000);
3407 return value >> VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE;
3411 * Update the guest state fields of vmcs12 to reflect changes that
3412 * occurred while L2 was running. (The "IA-32e mode guest" bit of the
3413 * VM-entry controls is also updated, since this is really a guest
3416 static void sync_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
3418 vmcs12->guest_cr0 = vmcs12_guest_cr0(vcpu, vmcs12);
3419 vmcs12->guest_cr4 = vmcs12_guest_cr4(vcpu, vmcs12);
3421 vmcs12->guest_rsp = kvm_register_read(vcpu, VCPU_REGS_RSP);
3422 vmcs12->guest_rip = kvm_register_read(vcpu, VCPU_REGS_RIP);
3423 vmcs12->guest_rflags = vmcs_readl(GUEST_RFLAGS);
3425 vmcs12->guest_es_selector = vmcs_read16(GUEST_ES_SELECTOR);
3426 vmcs12->guest_cs_selector = vmcs_read16(GUEST_CS_SELECTOR);
3427 vmcs12->guest_ss_selector = vmcs_read16(GUEST_SS_SELECTOR);
3428 vmcs12->guest_ds_selector = vmcs_read16(GUEST_DS_SELECTOR);
3429 vmcs12->guest_fs_selector = vmcs_read16(GUEST_FS_SELECTOR);
3430 vmcs12->guest_gs_selector = vmcs_read16(GUEST_GS_SELECTOR);
3431 vmcs12->guest_ldtr_selector = vmcs_read16(GUEST_LDTR_SELECTOR);
3432 vmcs12->guest_tr_selector = vmcs_read16(GUEST_TR_SELECTOR);
3433 vmcs12->guest_es_limit = vmcs_read32(GUEST_ES_LIMIT);
3434 vmcs12->guest_cs_limit = vmcs_read32(GUEST_CS_LIMIT);
3435 vmcs12->guest_ss_limit = vmcs_read32(GUEST_SS_LIMIT);
3436 vmcs12->guest_ds_limit = vmcs_read32(GUEST_DS_LIMIT);
3437 vmcs12->guest_fs_limit = vmcs_read32(GUEST_FS_LIMIT);
3438 vmcs12->guest_gs_limit = vmcs_read32(GUEST_GS_LIMIT);
3439 vmcs12->guest_ldtr_limit = vmcs_read32(GUEST_LDTR_LIMIT);
3440 vmcs12->guest_tr_limit = vmcs_read32(GUEST_TR_LIMIT);
3441 vmcs12->guest_gdtr_limit = vmcs_read32(GUEST_GDTR_LIMIT);
3442 vmcs12->guest_idtr_limit = vmcs_read32(GUEST_IDTR_LIMIT);
3443 vmcs12->guest_es_ar_bytes = vmcs_read32(GUEST_ES_AR_BYTES);
3444 vmcs12->guest_cs_ar_bytes = vmcs_read32(GUEST_CS_AR_BYTES);
3445 vmcs12->guest_ss_ar_bytes = vmcs_read32(GUEST_SS_AR_BYTES);
3446 vmcs12->guest_ds_ar_bytes = vmcs_read32(GUEST_DS_AR_BYTES);
3447 vmcs12->guest_fs_ar_bytes = vmcs_read32(GUEST_FS_AR_BYTES);
3448 vmcs12->guest_gs_ar_bytes = vmcs_read32(GUEST_GS_AR_BYTES);
3449 vmcs12->guest_ldtr_ar_bytes = vmcs_read32(GUEST_LDTR_AR_BYTES);
3450 vmcs12->guest_tr_ar_bytes = vmcs_read32(GUEST_TR_AR_BYTES);
3451 vmcs12->guest_es_base = vmcs_readl(GUEST_ES_BASE);
3452 vmcs12->guest_cs_base = vmcs_readl(GUEST_CS_BASE);
3453 vmcs12->guest_ss_base = vmcs_readl(GUEST_SS_BASE);
3454 vmcs12->guest_ds_base = vmcs_readl(GUEST_DS_BASE);
3455 vmcs12->guest_fs_base = vmcs_readl(GUEST_FS_BASE);
3456 vmcs12->guest_gs_base = vmcs_readl(GUEST_GS_BASE);
3457 vmcs12->guest_ldtr_base = vmcs_readl(GUEST_LDTR_BASE);
3458 vmcs12->guest_tr_base = vmcs_readl(GUEST_TR_BASE);
3459 vmcs12->guest_gdtr_base = vmcs_readl(GUEST_GDTR_BASE);
3460 vmcs12->guest_idtr_base = vmcs_readl(GUEST_IDTR_BASE);
3462 vmcs12->guest_interruptibility_info =
3463 vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
3464 vmcs12->guest_pending_dbg_exceptions =
3465 vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS);
3466 if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
3467 vmcs12->guest_activity_state = GUEST_ACTIVITY_HLT;
3469 vmcs12->guest_activity_state = GUEST_ACTIVITY_ACTIVE;
3471 if (nested_cpu_has_preemption_timer(vmcs12) &&
3472 vmcs12->vm_exit_controls & VM_EXIT_SAVE_VMX_PREEMPTION_TIMER)
3473 vmcs12->vmx_preemption_timer_value =
3474 vmx_get_preemption_timer_value(vcpu);
3477 * In some cases (usually, nested EPT), L2 is allowed to change its
3478 * own CR3 without exiting. If it has changed it, we must keep it.
3479 * Of course, if L0 is using shadow page tables, GUEST_CR3 was defined
3480 * by L0, not L1 or L2, so we mustn't unconditionally copy it to vmcs12.
3482 * Additionally, restore L2's PDPTR to vmcs12.
3485 vmcs12->guest_cr3 = vmcs_readl(GUEST_CR3);
3486 vmcs12->guest_pdptr0 = vmcs_read64(GUEST_PDPTR0);
3487 vmcs12->guest_pdptr1 = vmcs_read64(GUEST_PDPTR1);
3488 vmcs12->guest_pdptr2 = vmcs_read64(GUEST_PDPTR2);
3489 vmcs12->guest_pdptr3 = vmcs_read64(GUEST_PDPTR3);
3492 vmcs12->guest_linear_address = vmcs_readl(GUEST_LINEAR_ADDRESS);
3494 if (nested_cpu_has_vid(vmcs12))
3495 vmcs12->guest_intr_status = vmcs_read16(GUEST_INTR_STATUS);
3497 vmcs12->vm_entry_controls =
3498 (vmcs12->vm_entry_controls & ~VM_ENTRY_IA32E_MODE) |
3499 (vm_entry_controls_get(to_vmx(vcpu)) & VM_ENTRY_IA32E_MODE);
3501 if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_DEBUG_CONTROLS) {
3502 kvm_get_dr(vcpu, 7, (unsigned long *)&vmcs12->guest_dr7);
3503 vmcs12->guest_ia32_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL);
3506 /* TODO: These cannot have changed unless we have MSR bitmaps and
3507 * the relevant bit asks not to trap the change */
3508 if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_IA32_PAT)
3509 vmcs12->guest_ia32_pat = vmcs_read64(GUEST_IA32_PAT);
3510 if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_IA32_EFER)
3511 vmcs12->guest_ia32_efer = vcpu->arch.efer;
3512 vmcs12->guest_sysenter_cs = vmcs_read32(GUEST_SYSENTER_CS);
3513 vmcs12->guest_sysenter_esp = vmcs_readl(GUEST_SYSENTER_ESP);
3514 vmcs12->guest_sysenter_eip = vmcs_readl(GUEST_SYSENTER_EIP);
3515 if (kvm_mpx_supported())
3516 vmcs12->guest_bndcfgs = vmcs_read64(GUEST_BNDCFGS);
3520 * prepare_vmcs12 is part of what we need to do when the nested L2 guest exits
3521 * and we want to prepare to run its L1 parent. L1 keeps a vmcs for L2 (vmcs12),
3522 * and this function updates it to reflect the changes to the guest state while
3523 * L2 was running (and perhaps made some exits which were handled directly by L0
3524 * without going back to L1), and to reflect the exit reason.
3525 * Note that we do not have to copy here all VMCS fields, just those that
3526 * could have changed by the L2 guest or the exit - i.e., the guest-state and
3527 * exit-information fields only. Other fields are modified by L1 with VMWRITE,
3528 * which already writes to vmcs12 directly.
3530 static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
3531 u32 exit_reason, u32 exit_intr_info,
3532 unsigned long exit_qualification)
3534 /* update guest state fields: */
3535 sync_vmcs12(vcpu, vmcs12);
3537 /* update exit information fields: */
3539 vmcs12->vm_exit_reason = exit_reason;
3540 vmcs12->exit_qualification = exit_qualification;
3541 vmcs12->vm_exit_intr_info = exit_intr_info;
3543 vmcs12->idt_vectoring_info_field = 0;
3544 vmcs12->vm_exit_instruction_len = vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
3545 vmcs12->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
3547 if (!(vmcs12->vm_exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY)) {
3548 vmcs12->launch_state = 1;
3550 /* vm_entry_intr_info_field is cleared on exit. Emulate this
3551 * instead of reading the real value. */
3552 vmcs12->vm_entry_intr_info_field &= ~INTR_INFO_VALID_MASK;
3555 * Transfer the event that L0 or L1 may wanted to inject into
3556 * L2 to IDT_VECTORING_INFO_FIELD.
3558 vmcs12_save_pending_event(vcpu, vmcs12);
3561 * According to spec, there's no need to store the guest's
3562 * MSRs if the exit is due to a VM-entry failure that occurs
3563 * during or after loading the guest state. Since this exit
3564 * does not fall in that category, we need to save the MSRs.
3566 if (nested_vmx_store_msr(vcpu,
3567 vmcs12->vm_exit_msr_store_addr,
3568 vmcs12->vm_exit_msr_store_count))
3569 nested_vmx_abort(vcpu,
3570 VMX_ABORT_SAVE_GUEST_MSR_FAIL);
3574 * Drop what we picked up for L2 via vmx_complete_interrupts. It is
3575 * preserved above and would only end up incorrectly in L1.
3577 vcpu->arch.nmi_injected = false;
3578 kvm_clear_exception_queue(vcpu);
3579 kvm_clear_interrupt_queue(vcpu);
3583 * A part of what we need to when the nested L2 guest exits and we want to
3584 * run its L1 parent, is to reset L1's guest state to the host state specified
3586 * This function is to be called not only on normal nested exit, but also on
3587 * a nested entry failure, as explained in Intel's spec, 3B.23.7 ("VM-Entry
3588 * Failures During or After Loading Guest State").
3589 * This function should be called when the active VMCS is L1's (vmcs01).
3591 static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
3592 struct vmcs12 *vmcs12)
3594 struct kvm_segment seg;
3595 u32 entry_failure_code;
3597 if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER)
3598 vcpu->arch.efer = vmcs12->host_ia32_efer;
3599 else if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE)
3600 vcpu->arch.efer |= (EFER_LMA | EFER_LME);
3602 vcpu->arch.efer &= ~(EFER_LMA | EFER_LME);
3603 vmx_set_efer(vcpu, vcpu->arch.efer);
3605 kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->host_rsp);
3606 kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->host_rip);
3607 vmx_set_rflags(vcpu, X86_EFLAGS_FIXED);
3608 vmx_set_interrupt_shadow(vcpu, 0);
3611 * Note that calling vmx_set_cr0 is important, even if cr0 hasn't
3612 * actually changed, because vmx_set_cr0 refers to efer set above.
3614 * CR0_GUEST_HOST_MASK is already set in the original vmcs01
3615 * (KVM doesn't change it);
3617 vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS;
3618 vmx_set_cr0(vcpu, vmcs12->host_cr0);
3620 /* Same as above - no reason to call set_cr4_guest_host_mask(). */
3621 vcpu->arch.cr4_guest_owned_bits = ~vmcs_readl(CR4_GUEST_HOST_MASK);
3622 vmx_set_cr4(vcpu, vmcs12->host_cr4);
3624 nested_ept_uninit_mmu_context(vcpu);
3627 * Only PDPTE load can fail as the value of cr3 was checked on entry and
3628 * couldn't have changed.
3630 if (nested_vmx_load_cr3(vcpu, vmcs12->host_cr3, false, &entry_failure_code))
3631 nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_PDPTE_FAIL);
3634 vcpu->arch.walk_mmu->inject_page_fault = kvm_inject_page_fault;
3637 * If vmcs01 doesn't use VPID, CPU flushes TLB on every
3638 * VMEntry/VMExit. Thus, no need to flush TLB.
3640 * If vmcs12 doesn't use VPID, L1 expects TLB to be
3641 * flushed on every VMEntry/VMExit.
3643 * Otherwise, we can preserve TLB entries as long as we are
3644 * able to tag L1 TLB entries differently than L2 TLB entries.
3646 * If vmcs12 uses EPT, we need to execute this flush on EPTP01
3647 * and therefore we request the TLB flush to happen only after VMCS EPTP
3648 * has been set by KVM_REQ_LOAD_CR3.
3651 (!nested_cpu_has_vpid(vmcs12) || !nested_has_guest_tlb_tag(vcpu))) {
3652 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
3655 vmcs_write32(GUEST_SYSENTER_CS, vmcs12->host_ia32_sysenter_cs);
3656 vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->host_ia32_sysenter_esp);
3657 vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->host_ia32_sysenter_eip);
3658 vmcs_writel(GUEST_IDTR_BASE, vmcs12->host_idtr_base);
3659 vmcs_writel(GUEST_GDTR_BASE, vmcs12->host_gdtr_base);
3660 vmcs_write32(GUEST_IDTR_LIMIT, 0xFFFF);
3661 vmcs_write32(GUEST_GDTR_LIMIT, 0xFFFF);
3663 /* If not VM_EXIT_CLEAR_BNDCFGS, the L2 value propagates to L1. */
3664 if (vmcs12->vm_exit_controls & VM_EXIT_CLEAR_BNDCFGS)
3665 vmcs_write64(GUEST_BNDCFGS, 0);
3667 if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PAT) {
3668 vmcs_write64(GUEST_IA32_PAT, vmcs12->host_ia32_pat);
3669 vcpu->arch.pat = vmcs12->host_ia32_pat;
3671 if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL)
3672 vmcs_write64(GUEST_IA32_PERF_GLOBAL_CTRL,
3673 vmcs12->host_ia32_perf_global_ctrl);
3675 /* Set L1 segment info according to Intel SDM
3676 27.5.2 Loading Host Segment and Descriptor-Table Registers */
3677 seg = (struct kvm_segment) {
3679 .limit = 0xFFFFFFFF,
3680 .selector = vmcs12->host_cs_selector,
3686 if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE)
3690 vmx_set_segment(vcpu, &seg, VCPU_SREG_CS);
3691 seg = (struct kvm_segment) {
3693 .limit = 0xFFFFFFFF,
3700 seg.selector = vmcs12->host_ds_selector;
3701 vmx_set_segment(vcpu, &seg, VCPU_SREG_DS);
3702 seg.selector = vmcs12->host_es_selector;
3703 vmx_set_segment(vcpu, &seg, VCPU_SREG_ES);
3704 seg.selector = vmcs12->host_ss_selector;
3705 vmx_set_segment(vcpu, &seg, VCPU_SREG_SS);
3706 seg.selector = vmcs12->host_fs_selector;
3707 seg.base = vmcs12->host_fs_base;
3708 vmx_set_segment(vcpu, &seg, VCPU_SREG_FS);
3709 seg.selector = vmcs12->host_gs_selector;
3710 seg.base = vmcs12->host_gs_base;
3711 vmx_set_segment(vcpu, &seg, VCPU_SREG_GS);
3712 seg = (struct kvm_segment) {
3713 .base = vmcs12->host_tr_base,
3715 .selector = vmcs12->host_tr_selector,
3719 vmx_set_segment(vcpu, &seg, VCPU_SREG_TR);
3721 kvm_set_dr(vcpu, 7, 0x400);
3722 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
3724 if (cpu_has_vmx_msr_bitmap())
3725 vmx_update_msr_bitmap(vcpu);
3727 if (nested_vmx_load_msr(vcpu, vmcs12->vm_exit_msr_load_addr,
3728 vmcs12->vm_exit_msr_load_count))
3729 nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_MSR_FAIL);
3732 static inline u64 nested_vmx_get_vmcs01_guest_efer(struct vcpu_vmx *vmx)
3734 struct shared_msr_entry *efer_msr;
3737 if (vm_entry_controls_get(vmx) & VM_ENTRY_LOAD_IA32_EFER)
3738 return vmcs_read64(GUEST_IA32_EFER);
3740 if (cpu_has_load_ia32_efer())
3743 for (i = 0; i < vmx->msr_autoload.guest.nr; ++i) {
3744 if (vmx->msr_autoload.guest.val[i].index == MSR_EFER)
3745 return vmx->msr_autoload.guest.val[i].value;
3748 efer_msr = find_msr_entry(vmx, MSR_EFER);
3750 return efer_msr->data;
3755 static void nested_vmx_restore_host_state(struct kvm_vcpu *vcpu)
3757 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
3758 struct vcpu_vmx *vmx = to_vmx(vcpu);
3759 struct vmx_msr_entry g, h;
3760 struct msr_data msr;
3764 vcpu->arch.pat = vmcs_read64(GUEST_IA32_PAT);
3766 if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS) {
3768 * L1's host DR7 is lost if KVM_GUESTDBG_USE_HW_BP is set
3769 * as vmcs01.GUEST_DR7 contains a userspace defined value
3770 * and vcpu->arch.dr7 is not squirreled away before the
3771 * nested VMENTER (not worth adding a variable in nested_vmx).
3773 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
3774 kvm_set_dr(vcpu, 7, DR7_FIXED_1);
3776 WARN_ON(kvm_set_dr(vcpu, 7, vmcs_readl(GUEST_DR7)));
3780 * Note that calling vmx_set_{efer,cr0,cr4} is important as they
3781 * handle a variety of side effects to KVM's software model.
3783 vmx_set_efer(vcpu, nested_vmx_get_vmcs01_guest_efer(vmx));
3785 vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS;
3786 vmx_set_cr0(vcpu, vmcs_readl(CR0_READ_SHADOW));
3788 vcpu->arch.cr4_guest_owned_bits = ~vmcs_readl(CR4_GUEST_HOST_MASK);
3789 vmx_set_cr4(vcpu, vmcs_readl(CR4_READ_SHADOW));
3791 nested_ept_uninit_mmu_context(vcpu);
3792 vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
3793 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
3796 * Use ept_save_pdptrs(vcpu) to load the MMU's cached PDPTRs
3797 * from vmcs01 (if necessary). The PDPTRs are not loaded on
3798 * VMFail, like everything else we just need to ensure our
3799 * software model is up-to-date.
3801 ept_save_pdptrs(vcpu);
3803 kvm_mmu_reset_context(vcpu);
3805 if (cpu_has_vmx_msr_bitmap())
3806 vmx_update_msr_bitmap(vcpu);
3809 * This nasty bit of open coding is a compromise between blindly
3810 * loading L1's MSRs using the exit load lists (incorrect emulation
3811 * of VMFail), leaving the nested VM's MSRs in the software model
3812 * (incorrect behavior) and snapshotting the modified MSRs (too
3813 * expensive since the lists are unbound by hardware). For each
3814 * MSR that was (prematurely) loaded from the nested VMEntry load
3815 * list, reload it from the exit load list if it exists and differs
3816 * from the guest value. The intent is to stuff host state as
3817 * silently as possible, not to fully process the exit load list.
3819 msr.host_initiated = false;
3820 for (i = 0; i < vmcs12->vm_entry_msr_load_count; i++) {
3821 gpa = vmcs12->vm_entry_msr_load_addr + (i * sizeof(g));
3822 if (kvm_vcpu_read_guest(vcpu, gpa, &g, sizeof(g))) {
3823 pr_debug_ratelimited(
3824 "%s read MSR index failed (%u, 0x%08llx)\n",
3829 for (j = 0; j < vmcs12->vm_exit_msr_load_count; j++) {
3830 gpa = vmcs12->vm_exit_msr_load_addr + (j * sizeof(h));
3831 if (kvm_vcpu_read_guest(vcpu, gpa, &h, sizeof(h))) {
3832 pr_debug_ratelimited(
3833 "%s read MSR failed (%u, 0x%08llx)\n",
3837 if (h.index != g.index)
3839 if (h.value == g.value)
3842 if (nested_vmx_load_msr_check(vcpu, &h)) {
3843 pr_debug_ratelimited(
3844 "%s check failed (%u, 0x%x, 0x%x)\n",
3845 __func__, j, h.index, h.reserved);
3849 msr.index = h.index;
3851 if (kvm_set_msr(vcpu, &msr)) {
3852 pr_debug_ratelimited(
3853 "%s WRMSR failed (%u, 0x%x, 0x%llx)\n",
3854 __func__, j, h.index, h.value);
3863 nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_MSR_FAIL);
3867 * Emulate an exit from nested guest (L2) to L1, i.e., prepare to run L1
3868 * and modify vmcs12 to make it see what it would expect to see there if
3869 * L2 was its real guest. Must only be called when in L2 (is_guest_mode())
3871 void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason,
3872 u32 exit_intr_info, unsigned long exit_qualification)
3874 struct vcpu_vmx *vmx = to_vmx(vcpu);
3875 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
3877 /* trying to cancel vmlaunch/vmresume is a bug */
3878 WARN_ON_ONCE(vmx->nested.nested_run_pending);
3880 leave_guest_mode(vcpu);
3882 if (nested_cpu_has_preemption_timer(vmcs12))
3883 hrtimer_cancel(&to_vmx(vcpu)->nested.preemption_timer);
3885 if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
3886 vcpu->arch.tsc_offset -= vmcs12->tsc_offset;
3888 if (likely(!vmx->fail)) {
3889 if (exit_reason == -1)
3890 sync_vmcs12(vcpu, vmcs12);
3892 prepare_vmcs12(vcpu, vmcs12, exit_reason, exit_intr_info,
3893 exit_qualification);
3896 * Must happen outside of sync_vmcs12() as it will
3897 * also be used to capture vmcs12 cache as part of
3898 * capturing nVMX state for snapshot (migration).
3900 * Otherwise, this flush will dirty guest memory at a
3901 * point it is already assumed by user-space to be
3904 nested_flush_cached_shadow_vmcs12(vcpu, vmcs12);
3907 * The only expected VM-instruction error is "VM entry with
3908 * invalid control field(s)." Anything else indicates a
3909 * problem with L0. And we should never get here with a
3910 * VMFail of any type if early consistency checks are enabled.
3912 WARN_ON_ONCE(vmcs_read32(VM_INSTRUCTION_ERROR) !=
3913 VMXERR_ENTRY_INVALID_CONTROL_FIELD);
3914 WARN_ON_ONCE(nested_early_check);
3917 vmx_switch_vmcs(vcpu, &vmx->vmcs01);
3919 /* Update any VMCS fields that might have changed while L2 ran */
3920 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, vmx->msr_autoload.host.nr);
3921 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, vmx->msr_autoload.guest.nr);
3922 vmcs_write64(TSC_OFFSET, vcpu->arch.tsc_offset);
3924 if (kvm_has_tsc_control)
3925 decache_tsc_multiplier(vmx);
3927 if (vmx->nested.change_vmcs01_virtual_apic_mode) {
3928 vmx->nested.change_vmcs01_virtual_apic_mode = false;
3929 vmx_set_virtual_apic_mode(vcpu);
3930 } else if (!nested_cpu_has_ept(vmcs12) &&
3931 nested_cpu_has2(vmcs12,
3932 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) {
3933 vmx_flush_tlb(vcpu, true);
3936 /* Unpin physical memory we referred to in vmcs02 */
3937 if (vmx->nested.apic_access_page) {
3938 kvm_release_page_dirty(vmx->nested.apic_access_page);
3939 vmx->nested.apic_access_page = NULL;
3941 if (vmx->nested.virtual_apic_page) {
3942 kvm_release_page_dirty(vmx->nested.virtual_apic_page);
3943 vmx->nested.virtual_apic_page = NULL;
3945 if (vmx->nested.pi_desc_page) {
3946 kunmap(vmx->nested.pi_desc_page);
3947 kvm_release_page_dirty(vmx->nested.pi_desc_page);
3948 vmx->nested.pi_desc_page = NULL;
3949 vmx->nested.pi_desc = NULL;
3953 * We are now running in L2, mmu_notifier will force to reload the
3954 * page's hpa for L2 vmcs. Need to reload it for L1 before entering L1.
3956 kvm_make_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu);
3958 if ((exit_reason != -1) && (enable_shadow_vmcs || vmx->nested.hv_evmcs))
3959 vmx->nested.need_vmcs12_sync = true;
3961 /* in case we halted in L2 */
3962 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
3964 if (likely(!vmx->fail)) {
3966 * TODO: SDM says that with acknowledge interrupt on
3967 * exit, bit 31 of the VM-exit interrupt information
3968 * (valid interrupt) is always set to 1 on
3969 * EXIT_REASON_EXTERNAL_INTERRUPT, so we shouldn't
3970 * need kvm_cpu_has_interrupt(). See the commit
3971 * message for details.
3973 if (nested_exit_intr_ack_set(vcpu) &&
3974 exit_reason == EXIT_REASON_EXTERNAL_INTERRUPT &&
3975 kvm_cpu_has_interrupt(vcpu)) {
3976 int irq = kvm_cpu_get_interrupt(vcpu);
3978 vmcs12->vm_exit_intr_info = irq |
3979 INTR_INFO_VALID_MASK | INTR_TYPE_EXT_INTR;
3982 if (exit_reason != -1)
3983 trace_kvm_nested_vmexit_inject(vmcs12->vm_exit_reason,
3984 vmcs12->exit_qualification,
3985 vmcs12->idt_vectoring_info_field,
3986 vmcs12->vm_exit_intr_info,
3987 vmcs12->vm_exit_intr_error_code,
3990 load_vmcs12_host_state(vcpu, vmcs12);
3996 * After an early L2 VM-entry failure, we're now back
3997 * in L1 which thinks it just finished a VMLAUNCH or
3998 * VMRESUME instruction, so we need to set the failure
3999 * flag and the VM-instruction error field of the VMCS
4000 * accordingly, and skip the emulated instruction.
4002 (void)nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD);
4005 * Restore L1's host state to KVM's software model. We're here
4006 * because a consistency check was caught by hardware, which
4007 * means some amount of guest state has been propagated to KVM's
4008 * model and needs to be unwound to the host's state.
4010 nested_vmx_restore_host_state(vcpu);
4016 * Decode the memory-address operand of a vmx instruction, as recorded on an
4017 * exit caused by such an instruction (run by a guest hypervisor).
4018 * On success, returns 0. When the operand is invalid, returns 1 and throws
4021 int get_vmx_mem_address(struct kvm_vcpu *vcpu, unsigned long exit_qualification,
4022 u32 vmx_instruction_info, bool wr, gva_t *ret)
4026 struct kvm_segment s;
4029 * According to Vol. 3B, "Information for VM Exits Due to Instruction
4030 * Execution", on an exit, vmx_instruction_info holds most of the
4031 * addressing components of the operand. Only the displacement part
4032 * is put in exit_qualification (see 3B, "Basic VM-Exit Information").
4033 * For how an actual address is calculated from all these components,
4034 * refer to Vol. 1, "Operand Addressing".
4036 int scaling = vmx_instruction_info & 3;
4037 int addr_size = (vmx_instruction_info >> 7) & 7;
4038 bool is_reg = vmx_instruction_info & (1u << 10);
4039 int seg_reg = (vmx_instruction_info >> 15) & 7;
4040 int index_reg = (vmx_instruction_info >> 18) & 0xf;
4041 bool index_is_valid = !(vmx_instruction_info & (1u << 22));
4042 int base_reg = (vmx_instruction_info >> 23) & 0xf;
4043 bool base_is_valid = !(vmx_instruction_info & (1u << 27));
4046 kvm_queue_exception(vcpu, UD_VECTOR);
4050 /* Addr = segment_base + offset */
4051 /* offset = base + [index * scale] + displacement */
4052 off = exit_qualification; /* holds the displacement */
4054 off = (gva_t)sign_extend64(off, 31);
4055 else if (addr_size == 0)
4056 off = (gva_t)sign_extend64(off, 15);
4058 off += kvm_register_read(vcpu, base_reg);
4060 off += kvm_register_read(vcpu, index_reg)<<scaling;
4061 vmx_get_segment(vcpu, &s, seg_reg);
4064 * The effective address, i.e. @off, of a memory operand is truncated
4065 * based on the address size of the instruction. Note that this is
4066 * the *effective address*, i.e. the address prior to accounting for
4067 * the segment's base.
4069 if (addr_size == 1) /* 32 bit */
4071 else if (addr_size == 0) /* 16 bit */
4074 /* Checks for #GP/#SS exceptions. */
4076 if (is_long_mode(vcpu)) {
4078 * The virtual/linear address is never truncated in 64-bit
4079 * mode, e.g. a 32-bit address size can yield a 64-bit virtual
4080 * address when using FS/GS with a non-zero base.
4082 *ret = s.base + off;
4084 /* Long mode: #GP(0)/#SS(0) if the memory address is in a
4085 * non-canonical form. This is the only check on the memory
4086 * destination for long mode!
4088 exn = is_noncanonical_address(*ret, vcpu);
4091 * When not in long mode, the virtual/linear address is
4092 * unconditionally truncated to 32 bits regardless of the
4095 *ret = (s.base + off) & 0xffffffff;
4097 /* Protected mode: apply checks for segment validity in the
4099 * - segment type check (#GP(0) may be thrown)
4100 * - usability check (#GP(0)/#SS(0))
4101 * - limit check (#GP(0)/#SS(0))
4104 /* #GP(0) if the destination operand is located in a
4105 * read-only data segment or any code segment.
4107 exn = ((s.type & 0xa) == 0 || (s.type & 8));
4109 /* #GP(0) if the source operand is located in an
4110 * execute-only code segment
4112 exn = ((s.type & 0xa) == 8);
4114 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
4117 /* Protected mode: #GP(0)/#SS(0) if the segment is unusable.
4119 exn = (s.unusable != 0);
4122 * Protected mode: #GP(0)/#SS(0) if the memory operand is
4123 * outside the segment limit. All CPUs that support VMX ignore
4124 * limit checks for flat segments, i.e. segments with base==0,
4125 * limit==0xffffffff and of type expand-up data or code.
4127 if (!(s.base == 0 && s.limit == 0xffffffff &&
4128 ((s.type & 8) || !(s.type & 4))))
4129 exn = exn || (off + sizeof(u64) > s.limit);
4132 kvm_queue_exception_e(vcpu,
4133 seg_reg == VCPU_SREG_SS ?
4134 SS_VECTOR : GP_VECTOR,
4142 static int nested_vmx_get_vmptr(struct kvm_vcpu *vcpu, gpa_t *vmpointer)
4145 struct x86_exception e;
4147 if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION),
4148 vmcs_read32(VMX_INSTRUCTION_INFO), false, &gva))
4151 if (kvm_read_guest_virt(vcpu, gva, vmpointer, sizeof(*vmpointer), &e)) {
4152 kvm_inject_page_fault(vcpu, &e);
4160 * Allocate a shadow VMCS and associate it with the currently loaded
4161 * VMCS, unless such a shadow VMCS already exists. The newly allocated
4162 * VMCS is also VMCLEARed, so that it is ready for use.
4164 static struct vmcs *alloc_shadow_vmcs(struct kvm_vcpu *vcpu)
4166 struct vcpu_vmx *vmx = to_vmx(vcpu);
4167 struct loaded_vmcs *loaded_vmcs = vmx->loaded_vmcs;
4170 * We should allocate a shadow vmcs for vmcs01 only when L1
4171 * executes VMXON and free it when L1 executes VMXOFF.
4172 * As it is invalid to execute VMXON twice, we shouldn't reach
4173 * here when vmcs01 already have an allocated shadow vmcs.
4175 WARN_ON(loaded_vmcs == &vmx->vmcs01 && loaded_vmcs->shadow_vmcs);
4177 if (!loaded_vmcs->shadow_vmcs) {
4178 loaded_vmcs->shadow_vmcs = alloc_vmcs(true);
4179 if (loaded_vmcs->shadow_vmcs)
4180 vmcs_clear(loaded_vmcs->shadow_vmcs);
4182 return loaded_vmcs->shadow_vmcs;
4185 static int enter_vmx_operation(struct kvm_vcpu *vcpu)
4187 struct vcpu_vmx *vmx = to_vmx(vcpu);
4190 r = alloc_loaded_vmcs(&vmx->nested.vmcs02);
4194 vmx->nested.cached_vmcs12 = kzalloc(VMCS12_SIZE, GFP_KERNEL_ACCOUNT);
4195 if (!vmx->nested.cached_vmcs12)
4196 goto out_cached_vmcs12;
4198 vmx->nested.cached_shadow_vmcs12 = kzalloc(VMCS12_SIZE, GFP_KERNEL_ACCOUNT);
4199 if (!vmx->nested.cached_shadow_vmcs12)
4200 goto out_cached_shadow_vmcs12;
4202 if (enable_shadow_vmcs && !alloc_shadow_vmcs(vcpu))
4203 goto out_shadow_vmcs;
4205 hrtimer_init(&vmx->nested.preemption_timer, CLOCK_MONOTONIC,
4206 HRTIMER_MODE_REL_PINNED);
4207 vmx->nested.preemption_timer.function = vmx_preemption_timer_fn;
4209 vmx->nested.vpid02 = allocate_vpid();
4211 vmx->nested.vmcs02_initialized = false;
4212 vmx->nested.vmxon = true;
4214 if (pt_mode == PT_MODE_HOST_GUEST) {
4215 vmx->pt_desc.guest.ctl = 0;
4216 pt_update_intercept_for_msr(vmx);
4222 kfree(vmx->nested.cached_shadow_vmcs12);
4224 out_cached_shadow_vmcs12:
4225 kfree(vmx->nested.cached_vmcs12);
4228 free_loaded_vmcs(&vmx->nested.vmcs02);
4235 * Emulate the VMXON instruction.
4236 * Currently, we just remember that VMX is active, and do not save or even
4237 * inspect the argument to VMXON (the so-called "VMXON pointer") because we
4238 * do not currently need to store anything in that guest-allocated memory
4239 * region. Consequently, VMCLEAR and VMPTRLD also do not verify that the their
4240 * argument is different from the VMXON pointer (which the spec says they do).
4242 static int handle_vmon(struct kvm_vcpu *vcpu)
4247 struct vcpu_vmx *vmx = to_vmx(vcpu);
4248 const u64 VMXON_NEEDED_FEATURES = FEATURE_CONTROL_LOCKED
4249 | FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
4252 * The Intel VMX Instruction Reference lists a bunch of bits that are
4253 * prerequisite to running VMXON, most notably cr4.VMXE must be set to
4254 * 1 (see vmx_set_cr4() for when we allow the guest to set this).
4255 * Otherwise, we should fail with #UD. But most faulting conditions
4256 * have already been checked by hardware, prior to the VM-exit for
4257 * VMXON. We do test guest cr4.VMXE because processor CR4 always has
4258 * that bit set to 1 in non-root mode.
4260 if (!kvm_read_cr4_bits(vcpu, X86_CR4_VMXE)) {
4261 kvm_queue_exception(vcpu, UD_VECTOR);
4265 /* CPL=0 must be checked manually. */
4266 if (vmx_get_cpl(vcpu)) {
4267 kvm_inject_gp(vcpu, 0);
4271 if (vmx->nested.vmxon)
4272 return nested_vmx_failValid(vcpu,
4273 VMXERR_VMXON_IN_VMX_ROOT_OPERATION);
4275 if ((vmx->msr_ia32_feature_control & VMXON_NEEDED_FEATURES)
4276 != VMXON_NEEDED_FEATURES) {
4277 kvm_inject_gp(vcpu, 0);
4281 if (nested_vmx_get_vmptr(vcpu, &vmptr))
4286 * The first 4 bytes of VMXON region contain the supported
4287 * VMCS revision identifier
4289 * Note - IA32_VMX_BASIC[48] will never be 1 for the nested case;
4290 * which replaces physical address width with 32
4292 if (!PAGE_ALIGNED(vmptr) || (vmptr >> cpuid_maxphyaddr(vcpu)))
4293 return nested_vmx_failInvalid(vcpu);
4295 page = kvm_vcpu_gpa_to_page(vcpu, vmptr);
4296 if (is_error_page(page))
4297 return nested_vmx_failInvalid(vcpu);
4299 if (*(u32 *)kmap(page) != VMCS12_REVISION) {
4301 kvm_release_page_clean(page);
4302 return nested_vmx_failInvalid(vcpu);
4305 kvm_release_page_clean(page);
4307 vmx->nested.vmxon_ptr = vmptr;
4308 ret = enter_vmx_operation(vcpu);
4312 return nested_vmx_succeed(vcpu);
4315 static inline void nested_release_vmcs12(struct kvm_vcpu *vcpu)
4317 struct vcpu_vmx *vmx = to_vmx(vcpu);
4319 if (vmx->nested.current_vmptr == -1ull)
4322 if (enable_shadow_vmcs) {
4323 /* copy to memory all shadowed fields in case
4324 they were modified */
4325 copy_shadow_to_vmcs12(vmx);
4326 vmx->nested.need_vmcs12_sync = false;
4327 vmx_disable_shadow_vmcs(vmx);
4329 vmx->nested.posted_intr_nv = -1;
4331 /* Flush VMCS12 to guest memory */
4332 kvm_vcpu_write_guest_page(vcpu,
4333 vmx->nested.current_vmptr >> PAGE_SHIFT,
4334 vmx->nested.cached_vmcs12, 0, VMCS12_SIZE);
4336 kvm_mmu_free_roots(vcpu, &vcpu->arch.guest_mmu, KVM_MMU_ROOTS_ALL);
4338 vmx->nested.current_vmptr = -1ull;
4341 /* Emulate the VMXOFF instruction */
4342 static int handle_vmoff(struct kvm_vcpu *vcpu)
4344 if (!nested_vmx_check_permission(vcpu))
4347 return nested_vmx_succeed(vcpu);
4350 /* Emulate the VMCLEAR instruction */
4351 static int handle_vmclear(struct kvm_vcpu *vcpu)
4353 struct vcpu_vmx *vmx = to_vmx(vcpu);
4357 if (!nested_vmx_check_permission(vcpu))
4360 if (nested_vmx_get_vmptr(vcpu, &vmptr))
4363 if (!PAGE_ALIGNED(vmptr) || (vmptr >> cpuid_maxphyaddr(vcpu)))
4364 return nested_vmx_failValid(vcpu,
4365 VMXERR_VMCLEAR_INVALID_ADDRESS);
4367 if (vmptr == vmx->nested.vmxon_ptr)
4368 return nested_vmx_failValid(vcpu,
4369 VMXERR_VMCLEAR_VMXON_POINTER);
4371 if (vmx->nested.hv_evmcs_page) {
4372 if (vmptr == vmx->nested.hv_evmcs_vmptr)
4373 nested_release_evmcs(vcpu);
4375 if (vmptr == vmx->nested.current_vmptr)
4376 nested_release_vmcs12(vcpu);
4378 kvm_vcpu_write_guest(vcpu,
4379 vmptr + offsetof(struct vmcs12,
4381 &zero, sizeof(zero));
4384 return nested_vmx_succeed(vcpu);
4387 static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch);
4389 /* Emulate the VMLAUNCH instruction */
4390 static int handle_vmlaunch(struct kvm_vcpu *vcpu)
4392 return nested_vmx_run(vcpu, true);
4395 /* Emulate the VMRESUME instruction */
4396 static int handle_vmresume(struct kvm_vcpu *vcpu)
4399 return nested_vmx_run(vcpu, false);
4402 static int handle_vmread(struct kvm_vcpu *vcpu)
4404 unsigned long field;
4406 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
4407 u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
4409 struct vmcs12 *vmcs12;
4411 if (!nested_vmx_check_permission(vcpu))
4414 if (to_vmx(vcpu)->nested.current_vmptr == -1ull)
4415 return nested_vmx_failInvalid(vcpu);
4417 if (!is_guest_mode(vcpu))
4418 vmcs12 = get_vmcs12(vcpu);
4421 * When vmcs->vmcs_link_pointer is -1ull, any VMREAD
4422 * to shadowed-field sets the ALU flags for VMfailInvalid.
4424 if (get_vmcs12(vcpu)->vmcs_link_pointer == -1ull)
4425 return nested_vmx_failInvalid(vcpu);
4426 vmcs12 = get_shadow_vmcs12(vcpu);
4429 /* Decode instruction info and find the field to read */
4430 field = kvm_register_readl(vcpu, (((vmx_instruction_info) >> 28) & 0xf));
4431 /* Read the field, zero-extended to a u64 field_value */
4432 if (vmcs12_read_any(vmcs12, field, &field_value) < 0)
4433 return nested_vmx_failValid(vcpu,
4434 VMXERR_UNSUPPORTED_VMCS_COMPONENT);
4437 * Now copy part of this value to register or memory, as requested.
4438 * Note that the number of bits actually copied is 32 or 64 depending
4439 * on the guest's mode (32 or 64 bit), not on the given field's length.
4441 if (vmx_instruction_info & (1u << 10)) {
4442 kvm_register_writel(vcpu, (((vmx_instruction_info) >> 3) & 0xf),
4445 if (get_vmx_mem_address(vcpu, exit_qualification,
4446 vmx_instruction_info, true, &gva))
4448 /* _system ok, nested_vmx_check_permission has verified cpl=0 */
4449 kvm_write_guest_virt_system(vcpu, gva, &field_value,
4450 (is_long_mode(vcpu) ? 8 : 4), NULL);
4453 return nested_vmx_succeed(vcpu);
4457 static int handle_vmwrite(struct kvm_vcpu *vcpu)
4459 unsigned long field;
4461 struct vcpu_vmx *vmx = to_vmx(vcpu);
4462 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
4463 u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
4465 /* The value to write might be 32 or 64 bits, depending on L1's long
4466 * mode, and eventually we need to write that into a field of several
4467 * possible lengths. The code below first zero-extends the value to 64
4468 * bit (field_value), and then copies only the appropriate number of
4469 * bits into the vmcs12 field.
4471 u64 field_value = 0;
4472 struct x86_exception e;
4473 struct vmcs12 *vmcs12;
4475 if (!nested_vmx_check_permission(vcpu))
4478 if (vmx->nested.current_vmptr == -1ull)
4479 return nested_vmx_failInvalid(vcpu);
4481 if (vmx_instruction_info & (1u << 10))
4482 field_value = kvm_register_readl(vcpu,
4483 (((vmx_instruction_info) >> 3) & 0xf));
4485 if (get_vmx_mem_address(vcpu, exit_qualification,
4486 vmx_instruction_info, false, &gva))
4488 if (kvm_read_guest_virt(vcpu, gva, &field_value,
4489 (is_64_bit_mode(vcpu) ? 8 : 4), &e)) {
4490 kvm_inject_page_fault(vcpu, &e);
4496 field = kvm_register_readl(vcpu, (((vmx_instruction_info) >> 28) & 0xf));
4498 * If the vCPU supports "VMWRITE to any supported field in the
4499 * VMCS," then the "read-only" fields are actually read/write.
4501 if (vmcs_field_readonly(field) &&
4502 !nested_cpu_has_vmwrite_any_field(vcpu))
4503 return nested_vmx_failValid(vcpu,
4504 VMXERR_VMWRITE_READ_ONLY_VMCS_COMPONENT);
4506 if (!is_guest_mode(vcpu))
4507 vmcs12 = get_vmcs12(vcpu);
4510 * When vmcs->vmcs_link_pointer is -1ull, any VMWRITE
4511 * to shadowed-field sets the ALU flags for VMfailInvalid.
4513 if (get_vmcs12(vcpu)->vmcs_link_pointer == -1ull)
4514 return nested_vmx_failInvalid(vcpu);
4515 vmcs12 = get_shadow_vmcs12(vcpu);
4518 if (vmcs12_write_any(vmcs12, field, field_value) < 0)
4519 return nested_vmx_failValid(vcpu,
4520 VMXERR_UNSUPPORTED_VMCS_COMPONENT);
4523 * Do not track vmcs12 dirty-state if in guest-mode
4524 * as we actually dirty shadow vmcs12 instead of vmcs12.
4526 if (!is_guest_mode(vcpu)) {
4528 #define SHADOW_FIELD_RW(x) case x:
4529 #include "vmcs_shadow_fields.h"
4531 * The fields that can be updated by L1 without a vmexit are
4532 * always updated in the vmcs02, the others go down the slow
4533 * path of prepare_vmcs02.
4537 vmx->nested.dirty_vmcs12 = true;
4542 return nested_vmx_succeed(vcpu);
4545 static void set_current_vmptr(struct vcpu_vmx *vmx, gpa_t vmptr)
4547 vmx->nested.current_vmptr = vmptr;
4548 if (enable_shadow_vmcs) {
4549 vmcs_set_bits(SECONDARY_VM_EXEC_CONTROL,
4550 SECONDARY_EXEC_SHADOW_VMCS);
4551 vmcs_write64(VMCS_LINK_POINTER,
4552 __pa(vmx->vmcs01.shadow_vmcs));
4553 vmx->nested.need_vmcs12_sync = true;
4555 vmx->nested.dirty_vmcs12 = true;
4558 /* Emulate the VMPTRLD instruction */
4559 static int handle_vmptrld(struct kvm_vcpu *vcpu)
4561 struct vcpu_vmx *vmx = to_vmx(vcpu);
4564 if (!nested_vmx_check_permission(vcpu))
4567 if (nested_vmx_get_vmptr(vcpu, &vmptr))
4570 if (!PAGE_ALIGNED(vmptr) || (vmptr >> cpuid_maxphyaddr(vcpu)))
4571 return nested_vmx_failValid(vcpu,
4572 VMXERR_VMPTRLD_INVALID_ADDRESS);
4574 if (vmptr == vmx->nested.vmxon_ptr)
4575 return nested_vmx_failValid(vcpu,
4576 VMXERR_VMPTRLD_VMXON_POINTER);
4578 /* Forbid normal VMPTRLD if Enlightened version was used */
4579 if (vmx->nested.hv_evmcs)
4582 if (vmx->nested.current_vmptr != vmptr) {
4583 struct vmcs12 *new_vmcs12;
4586 page = kvm_vcpu_gpa_to_page(vcpu, vmptr);
4587 if (is_error_page(page)) {
4589 * Reads from an unbacked page return all 1s,
4590 * which means that the 32 bits located at the
4591 * given physical address won't match the required
4592 * VMCS12_REVISION identifier.
4594 return nested_vmx_failValid(vcpu,
4595 VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID);
4597 new_vmcs12 = kmap(page);
4598 if (new_vmcs12->hdr.revision_id != VMCS12_REVISION ||
4599 (new_vmcs12->hdr.shadow_vmcs &&
4600 !nested_cpu_has_vmx_shadow_vmcs(vcpu))) {
4602 kvm_release_page_clean(page);
4603 return nested_vmx_failValid(vcpu,
4604 VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID);
4607 nested_release_vmcs12(vcpu);
4610 * Load VMCS12 from guest memory since it is not already
4613 memcpy(vmx->nested.cached_vmcs12, new_vmcs12, VMCS12_SIZE);
4615 kvm_release_page_clean(page);
4617 set_current_vmptr(vmx, vmptr);
4620 return nested_vmx_succeed(vcpu);
4623 /* Emulate the VMPTRST instruction */
4624 static int handle_vmptrst(struct kvm_vcpu *vcpu)
4626 unsigned long exit_qual = vmcs_readl(EXIT_QUALIFICATION);
4627 u32 instr_info = vmcs_read32(VMX_INSTRUCTION_INFO);
4628 gpa_t current_vmptr = to_vmx(vcpu)->nested.current_vmptr;
4629 struct x86_exception e;
4632 if (!nested_vmx_check_permission(vcpu))
4635 if (unlikely(to_vmx(vcpu)->nested.hv_evmcs))
4638 if (get_vmx_mem_address(vcpu, exit_qual, instr_info, true, &gva))
4640 /* *_system ok, nested_vmx_check_permission has verified cpl=0 */
4641 if (kvm_write_guest_virt_system(vcpu, gva, (void *)¤t_vmptr,
4642 sizeof(gpa_t), &e)) {
4643 kvm_inject_page_fault(vcpu, &e);
4646 return nested_vmx_succeed(vcpu);
4649 /* Emulate the INVEPT instruction */
4650 static int handle_invept(struct kvm_vcpu *vcpu)
4652 struct vcpu_vmx *vmx = to_vmx(vcpu);
4653 u32 vmx_instruction_info, types;
4656 struct x86_exception e;
4661 if (!(vmx->nested.msrs.secondary_ctls_high &
4662 SECONDARY_EXEC_ENABLE_EPT) ||
4663 !(vmx->nested.msrs.ept_caps & VMX_EPT_INVEPT_BIT)) {
4664 kvm_queue_exception(vcpu, UD_VECTOR);
4668 if (!nested_vmx_check_permission(vcpu))
4671 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
4672 type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf);
4674 types = (vmx->nested.msrs.ept_caps >> VMX_EPT_EXTENT_SHIFT) & 6;
4676 if (type >= 32 || !(types & (1 << type)))
4677 return nested_vmx_failValid(vcpu,
4678 VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
4680 /* According to the Intel VMX instruction reference, the memory
4681 * operand is read even if it isn't needed (e.g., for type==global)
4683 if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION),
4684 vmx_instruction_info, false, &gva))
4686 if (kvm_read_guest_virt(vcpu, gva, &operand, sizeof(operand), &e)) {
4687 kvm_inject_page_fault(vcpu, &e);
4692 case VMX_EPT_EXTENT_GLOBAL:
4694 * TODO: track mappings and invalidate
4695 * single context requests appropriately
4697 case VMX_EPT_EXTENT_CONTEXT:
4698 kvm_mmu_sync_roots(vcpu);
4699 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
4706 return nested_vmx_succeed(vcpu);
4709 static int handle_invvpid(struct kvm_vcpu *vcpu)
4711 struct vcpu_vmx *vmx = to_vmx(vcpu);
4712 u32 vmx_instruction_info;
4713 unsigned long type, types;
4715 struct x86_exception e;
4722 if (!(vmx->nested.msrs.secondary_ctls_high &
4723 SECONDARY_EXEC_ENABLE_VPID) ||
4724 !(vmx->nested.msrs.vpid_caps & VMX_VPID_INVVPID_BIT)) {
4725 kvm_queue_exception(vcpu, UD_VECTOR);
4729 if (!nested_vmx_check_permission(vcpu))
4732 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
4733 type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf);
4735 types = (vmx->nested.msrs.vpid_caps &
4736 VMX_VPID_EXTENT_SUPPORTED_MASK) >> 8;
4738 if (type >= 32 || !(types & (1 << type)))
4739 return nested_vmx_failValid(vcpu,
4740 VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
4742 /* according to the intel vmx instruction reference, the memory
4743 * operand is read even if it isn't needed (e.g., for type==global)
4745 if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION),
4746 vmx_instruction_info, false, &gva))
4748 if (kvm_read_guest_virt(vcpu, gva, &operand, sizeof(operand), &e)) {
4749 kvm_inject_page_fault(vcpu, &e);
4752 if (operand.vpid >> 16)
4753 return nested_vmx_failValid(vcpu,
4754 VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
4756 vpid02 = nested_get_vpid02(vcpu);
4758 case VMX_VPID_EXTENT_INDIVIDUAL_ADDR:
4759 if (!operand.vpid ||
4760 is_noncanonical_address(operand.gla, vcpu))
4761 return nested_vmx_failValid(vcpu,
4762 VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
4763 if (cpu_has_vmx_invvpid_individual_addr()) {
4764 __invvpid(VMX_VPID_EXTENT_INDIVIDUAL_ADDR,
4765 vpid02, operand.gla);
4767 __vmx_flush_tlb(vcpu, vpid02, false);
4769 case VMX_VPID_EXTENT_SINGLE_CONTEXT:
4770 case VMX_VPID_EXTENT_SINGLE_NON_GLOBAL:
4772 return nested_vmx_failValid(vcpu,
4773 VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
4774 __vmx_flush_tlb(vcpu, vpid02, false);
4776 case VMX_VPID_EXTENT_ALL_CONTEXT:
4777 __vmx_flush_tlb(vcpu, vpid02, false);
4781 return kvm_skip_emulated_instruction(vcpu);
4784 return nested_vmx_succeed(vcpu);
4787 static int nested_vmx_eptp_switching(struct kvm_vcpu *vcpu,
4788 struct vmcs12 *vmcs12)
4790 u32 index = vcpu->arch.regs[VCPU_REGS_RCX];
4792 bool accessed_dirty;
4793 struct kvm_mmu *mmu = vcpu->arch.walk_mmu;
4795 if (!nested_cpu_has_eptp_switching(vmcs12) ||
4796 !nested_cpu_has_ept(vmcs12))
4799 if (index >= VMFUNC_EPTP_ENTRIES)
4803 if (kvm_vcpu_read_guest_page(vcpu, vmcs12->eptp_list_address >> PAGE_SHIFT,
4804 &address, index * 8, 8))
4807 accessed_dirty = !!(address & VMX_EPTP_AD_ENABLE_BIT);
4810 * If the (L2) guest does a vmfunc to the currently
4811 * active ept pointer, we don't have to do anything else
4813 if (vmcs12->ept_pointer != address) {
4814 if (!valid_ept_address(vcpu, address))
4817 kvm_mmu_unload(vcpu);
4818 mmu->ept_ad = accessed_dirty;
4819 mmu->mmu_role.base.ad_disabled = !accessed_dirty;
4820 vmcs12->ept_pointer = address;
4822 * TODO: Check what's the correct approach in case
4823 * mmu reload fails. Currently, we just let the next
4824 * reload potentially fail
4826 kvm_mmu_reload(vcpu);
4832 static int handle_vmfunc(struct kvm_vcpu *vcpu)
4834 struct vcpu_vmx *vmx = to_vmx(vcpu);
4835 struct vmcs12 *vmcs12;
4836 u32 function = vcpu->arch.regs[VCPU_REGS_RAX];
4839 * VMFUNC is only supported for nested guests, but we always enable the
4840 * secondary control for simplicity; for non-nested mode, fake that we
4841 * didn't by injecting #UD.
4843 if (!is_guest_mode(vcpu)) {
4844 kvm_queue_exception(vcpu, UD_VECTOR);
4848 vmcs12 = get_vmcs12(vcpu);
4849 if ((vmcs12->vm_function_control & (1 << function)) == 0)
4854 if (nested_vmx_eptp_switching(vcpu, vmcs12))
4860 return kvm_skip_emulated_instruction(vcpu);
4863 nested_vmx_vmexit(vcpu, vmx->exit_reason,
4864 vmcs_read32(VM_EXIT_INTR_INFO),
4865 vmcs_readl(EXIT_QUALIFICATION));
4870 static bool nested_vmx_exit_handled_io(struct kvm_vcpu *vcpu,
4871 struct vmcs12 *vmcs12)
4873 unsigned long exit_qualification;
4874 gpa_t bitmap, last_bitmap;
4879 if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS))
4880 return nested_cpu_has(vmcs12, CPU_BASED_UNCOND_IO_EXITING);
4882 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
4884 port = exit_qualification >> 16;
4885 size = (exit_qualification & 7) + 1;
4887 last_bitmap = (gpa_t)-1;
4892 bitmap = vmcs12->io_bitmap_a;
4893 else if (port < 0x10000)
4894 bitmap = vmcs12->io_bitmap_b;
4897 bitmap += (port & 0x7fff) / 8;
4899 if (last_bitmap != bitmap)
4900 if (kvm_vcpu_read_guest(vcpu, bitmap, &b, 1))
4902 if (b & (1 << (port & 7)))
4907 last_bitmap = bitmap;
4914 * Return 1 if we should exit from L2 to L1 to handle an MSR access access,
4915 * rather than handle it ourselves in L0. I.e., check whether L1 expressed
4916 * disinterest in the current event (read or write a specific MSR) by using an
4917 * MSR bitmap. This may be the case even when L0 doesn't use MSR bitmaps.
4919 static bool nested_vmx_exit_handled_msr(struct kvm_vcpu *vcpu,
4920 struct vmcs12 *vmcs12, u32 exit_reason)
4922 u32 msr_index = vcpu->arch.regs[VCPU_REGS_RCX];
4925 if (!nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS))
4929 * The MSR_BITMAP page is divided into four 1024-byte bitmaps,
4930 * for the four combinations of read/write and low/high MSR numbers.
4931 * First we need to figure out which of the four to use:
4933 bitmap = vmcs12->msr_bitmap;
4934 if (exit_reason == EXIT_REASON_MSR_WRITE)
4936 if (msr_index >= 0xc0000000) {
4937 msr_index -= 0xc0000000;
4941 /* Then read the msr_index'th bit from this bitmap: */
4942 if (msr_index < 1024*8) {
4944 if (kvm_vcpu_read_guest(vcpu, bitmap + msr_index/8, &b, 1))
4946 return 1 & (b >> (msr_index & 7));
4948 return true; /* let L1 handle the wrong parameter */
4952 * Return 1 if we should exit from L2 to L1 to handle a CR access exit,
4953 * rather than handle it ourselves in L0. I.e., check if L1 wanted to
4954 * intercept (via guest_host_mask etc.) the current event.
4956 static bool nested_vmx_exit_handled_cr(struct kvm_vcpu *vcpu,
4957 struct vmcs12 *vmcs12)
4959 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
4960 int cr = exit_qualification & 15;
4964 switch ((exit_qualification >> 4) & 3) {
4965 case 0: /* mov to cr */
4966 reg = (exit_qualification >> 8) & 15;
4967 val = kvm_register_readl(vcpu, reg);
4970 if (vmcs12->cr0_guest_host_mask &
4971 (val ^ vmcs12->cr0_read_shadow))
4975 if ((vmcs12->cr3_target_count >= 1 &&
4976 vmcs12->cr3_target_value0 == val) ||
4977 (vmcs12->cr3_target_count >= 2 &&
4978 vmcs12->cr3_target_value1 == val) ||
4979 (vmcs12->cr3_target_count >= 3 &&
4980 vmcs12->cr3_target_value2 == val) ||
4981 (vmcs12->cr3_target_count >= 4 &&
4982 vmcs12->cr3_target_value3 == val))
4984 if (nested_cpu_has(vmcs12, CPU_BASED_CR3_LOAD_EXITING))
4988 if (vmcs12->cr4_guest_host_mask &
4989 (vmcs12->cr4_read_shadow ^ val))
4993 if (nested_cpu_has(vmcs12, CPU_BASED_CR8_LOAD_EXITING))
4999 if ((vmcs12->cr0_guest_host_mask & X86_CR0_TS) &&
5000 (vmcs12->cr0_read_shadow & X86_CR0_TS))
5003 case 1: /* mov from cr */
5006 if (vmcs12->cpu_based_vm_exec_control &
5007 CPU_BASED_CR3_STORE_EXITING)
5011 if (vmcs12->cpu_based_vm_exec_control &
5012 CPU_BASED_CR8_STORE_EXITING)
5019 * lmsw can change bits 1..3 of cr0, and only set bit 0 of
5020 * cr0. Other attempted changes are ignored, with no exit.
5022 val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f;
5023 if (vmcs12->cr0_guest_host_mask & 0xe &
5024 (val ^ vmcs12->cr0_read_shadow))
5026 if ((vmcs12->cr0_guest_host_mask & 0x1) &&
5027 !(vmcs12->cr0_read_shadow & 0x1) &&
5035 static bool nested_vmx_exit_handled_vmcs_access(struct kvm_vcpu *vcpu,
5036 struct vmcs12 *vmcs12, gpa_t bitmap)
5038 u32 vmx_instruction_info;
5039 unsigned long field;
5042 if (!nested_cpu_has_shadow_vmcs(vmcs12))
5045 /* Decode instruction info and find the field to access */
5046 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
5047 field = kvm_register_read(vcpu, (((vmx_instruction_info) >> 28) & 0xf));
5049 /* Out-of-range fields always cause a VM exit from L2 to L1 */
5053 if (kvm_vcpu_read_guest(vcpu, bitmap + field/8, &b, 1))
5056 return 1 & (b >> (field & 7));
5060 * Return 1 if we should exit from L2 to L1 to handle an exit, or 0 if we
5061 * should handle it ourselves in L0 (and then continue L2). Only call this
5062 * when in is_guest_mode (L2).
5064 bool nested_vmx_exit_reflected(struct kvm_vcpu *vcpu, u32 exit_reason)
5066 u32 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
5067 struct vcpu_vmx *vmx = to_vmx(vcpu);
5068 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
5070 if (vmx->nested.nested_run_pending)
5073 if (unlikely(vmx->fail)) {
5074 pr_info_ratelimited("%s failed vm entry %x\n", __func__,
5075 vmcs_read32(VM_INSTRUCTION_ERROR));
5080 * The host physical addresses of some pages of guest memory
5081 * are loaded into the vmcs02 (e.g. vmcs12's Virtual APIC
5082 * Page). The CPU may write to these pages via their host
5083 * physical address while L2 is running, bypassing any
5084 * address-translation-based dirty tracking (e.g. EPT write
5087 * Mark them dirty on every exit from L2 to prevent them from
5088 * getting out of sync with dirty tracking.
5090 nested_mark_vmcs12_pages_dirty(vcpu);
5092 trace_kvm_nested_vmexit(kvm_rip_read(vcpu), exit_reason,
5093 vmcs_readl(EXIT_QUALIFICATION),
5094 vmx->idt_vectoring_info,
5096 vmcs_read32(VM_EXIT_INTR_ERROR_CODE),
5099 switch (exit_reason) {
5100 case EXIT_REASON_EXCEPTION_NMI:
5101 if (is_nmi(intr_info))
5103 else if (is_page_fault(intr_info))
5104 return !vmx->vcpu.arch.apf.host_apf_reason && enable_ept;
5105 else if (is_debug(intr_info) &&
5107 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
5109 else if (is_breakpoint(intr_info) &&
5110 vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
5112 return vmcs12->exception_bitmap &
5113 (1u << (intr_info & INTR_INFO_VECTOR_MASK));
5114 case EXIT_REASON_EXTERNAL_INTERRUPT:
5116 case EXIT_REASON_TRIPLE_FAULT:
5118 case EXIT_REASON_PENDING_INTERRUPT:
5119 return nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_INTR_PENDING);
5120 case EXIT_REASON_NMI_WINDOW:
5121 return nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_NMI_PENDING);
5122 case EXIT_REASON_TASK_SWITCH:
5124 case EXIT_REASON_CPUID:
5126 case EXIT_REASON_HLT:
5127 return nested_cpu_has(vmcs12, CPU_BASED_HLT_EXITING);
5128 case EXIT_REASON_INVD:
5130 case EXIT_REASON_INVLPG:
5131 return nested_cpu_has(vmcs12, CPU_BASED_INVLPG_EXITING);
5132 case EXIT_REASON_RDPMC:
5133 return nested_cpu_has(vmcs12, CPU_BASED_RDPMC_EXITING);
5134 case EXIT_REASON_RDRAND:
5135 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_RDRAND_EXITING);
5136 case EXIT_REASON_RDSEED:
5137 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_RDSEED_EXITING);
5138 case EXIT_REASON_RDTSC: case EXIT_REASON_RDTSCP:
5139 return nested_cpu_has(vmcs12, CPU_BASED_RDTSC_EXITING);
5140 case EXIT_REASON_VMREAD:
5141 return nested_vmx_exit_handled_vmcs_access(vcpu, vmcs12,
5142 vmcs12->vmread_bitmap);
5143 case EXIT_REASON_VMWRITE:
5144 return nested_vmx_exit_handled_vmcs_access(vcpu, vmcs12,
5145 vmcs12->vmwrite_bitmap);
5146 case EXIT_REASON_VMCALL: case EXIT_REASON_VMCLEAR:
5147 case EXIT_REASON_VMLAUNCH: case EXIT_REASON_VMPTRLD:
5148 case EXIT_REASON_VMPTRST: case EXIT_REASON_VMRESUME:
5149 case EXIT_REASON_VMOFF: case EXIT_REASON_VMON:
5150 case EXIT_REASON_INVEPT: case EXIT_REASON_INVVPID:
5152 * VMX instructions trap unconditionally. This allows L1 to
5153 * emulate them for its L2 guest, i.e., allows 3-level nesting!
5156 case EXIT_REASON_CR_ACCESS:
5157 return nested_vmx_exit_handled_cr(vcpu, vmcs12);
5158 case EXIT_REASON_DR_ACCESS:
5159 return nested_cpu_has(vmcs12, CPU_BASED_MOV_DR_EXITING);
5160 case EXIT_REASON_IO_INSTRUCTION:
5161 return nested_vmx_exit_handled_io(vcpu, vmcs12);
5162 case EXIT_REASON_GDTR_IDTR: case EXIT_REASON_LDTR_TR:
5163 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_DESC);
5164 case EXIT_REASON_MSR_READ:
5165 case EXIT_REASON_MSR_WRITE:
5166 return nested_vmx_exit_handled_msr(vcpu, vmcs12, exit_reason);
5167 case EXIT_REASON_INVALID_STATE:
5169 case EXIT_REASON_MWAIT_INSTRUCTION:
5170 return nested_cpu_has(vmcs12, CPU_BASED_MWAIT_EXITING);
5171 case EXIT_REASON_MONITOR_TRAP_FLAG:
5172 return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_TRAP_FLAG);
5173 case EXIT_REASON_MONITOR_INSTRUCTION:
5174 return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_EXITING);
5175 case EXIT_REASON_PAUSE_INSTRUCTION:
5176 return nested_cpu_has(vmcs12, CPU_BASED_PAUSE_EXITING) ||
5177 nested_cpu_has2(vmcs12,
5178 SECONDARY_EXEC_PAUSE_LOOP_EXITING);
5179 case EXIT_REASON_MCE_DURING_VMENTRY:
5181 case EXIT_REASON_TPR_BELOW_THRESHOLD:
5182 return nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW);
5183 case EXIT_REASON_APIC_ACCESS:
5184 case EXIT_REASON_APIC_WRITE:
5185 case EXIT_REASON_EOI_INDUCED:
5187 * The controls for "virtualize APIC accesses," "APIC-
5188 * register virtualization," and "virtual-interrupt
5189 * delivery" only come from vmcs12.
5192 case EXIT_REASON_EPT_VIOLATION:
5194 * L0 always deals with the EPT violation. If nested EPT is
5195 * used, and the nested mmu code discovers that the address is
5196 * missing in the guest EPT table (EPT12), the EPT violation
5197 * will be injected with nested_ept_inject_page_fault()
5200 case EXIT_REASON_EPT_MISCONFIG:
5202 * L2 never uses directly L1's EPT, but rather L0's own EPT
5203 * table (shadow on EPT) or a merged EPT table that L0 built
5204 * (EPT on EPT). So any problems with the structure of the
5205 * table is L0's fault.
5208 case EXIT_REASON_INVPCID:
5210 nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_INVPCID) &&
5211 nested_cpu_has(vmcs12, CPU_BASED_INVLPG_EXITING);
5212 case EXIT_REASON_WBINVD:
5213 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_WBINVD_EXITING);
5214 case EXIT_REASON_XSETBV:
5216 case EXIT_REASON_XSAVES: case EXIT_REASON_XRSTORS:
5218 * This should never happen, since it is not possible to
5219 * set XSS to a non-zero value---neither in L1 nor in L2.
5220 * If if it were, XSS would have to be checked against
5221 * the XSS exit bitmap in vmcs12.
5223 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES);
5224 case EXIT_REASON_PREEMPTION_TIMER:
5226 case EXIT_REASON_PML_FULL:
5227 /* We emulate PML support to L1. */
5229 case EXIT_REASON_VMFUNC:
5230 /* VM functions are emulated through L2->L0 vmexits. */
5232 case EXIT_REASON_ENCLS:
5233 /* SGX is never exposed to L1 */
5241 static int vmx_get_nested_state(struct kvm_vcpu *vcpu,
5242 struct kvm_nested_state __user *user_kvm_nested_state,
5245 struct vcpu_vmx *vmx;
5246 struct vmcs12 *vmcs12;
5247 struct kvm_nested_state kvm_state = {
5250 .size = sizeof(kvm_state),
5251 .vmx.vmxon_pa = -1ull,
5252 .vmx.vmcs_pa = -1ull,
5256 return kvm_state.size + 2 * VMCS12_SIZE;
5259 vmcs12 = get_vmcs12(vcpu);
5261 if (nested_vmx_allowed(vcpu) && vmx->nested.enlightened_vmcs_enabled)
5262 kvm_state.flags |= KVM_STATE_NESTED_EVMCS;
5264 if (nested_vmx_allowed(vcpu) &&
5265 (vmx->nested.vmxon || vmx->nested.smm.vmxon)) {
5266 kvm_state.vmx.vmxon_pa = vmx->nested.vmxon_ptr;
5267 kvm_state.vmx.vmcs_pa = vmx->nested.current_vmptr;
5269 if (vmx_has_valid_vmcs12(vcpu)) {
5270 kvm_state.size += VMCS12_SIZE;
5272 if (is_guest_mode(vcpu) &&
5273 nested_cpu_has_shadow_vmcs(vmcs12) &&
5274 vmcs12->vmcs_link_pointer != -1ull)
5275 kvm_state.size += VMCS12_SIZE;
5278 if (vmx->nested.smm.vmxon)
5279 kvm_state.vmx.smm.flags |= KVM_STATE_NESTED_SMM_VMXON;
5281 if (vmx->nested.smm.guest_mode)
5282 kvm_state.vmx.smm.flags |= KVM_STATE_NESTED_SMM_GUEST_MODE;
5284 if (is_guest_mode(vcpu)) {
5285 kvm_state.flags |= KVM_STATE_NESTED_GUEST_MODE;
5287 if (vmx->nested.nested_run_pending)
5288 kvm_state.flags |= KVM_STATE_NESTED_RUN_PENDING;
5292 if (user_data_size < kvm_state.size)
5295 if (copy_to_user(user_kvm_nested_state, &kvm_state, sizeof(kvm_state)))
5298 if (!vmx_has_valid_vmcs12(vcpu))
5302 * When running L2, the authoritative vmcs12 state is in the
5303 * vmcs02. When running L1, the authoritative vmcs12 state is
5304 * in the shadow or enlightened vmcs linked to vmcs01, unless
5305 * need_vmcs12_sync is set, in which case, the authoritative
5306 * vmcs12 state is in the vmcs12 already.
5308 if (is_guest_mode(vcpu)) {
5309 sync_vmcs12(vcpu, vmcs12);
5310 } else if (!vmx->nested.need_vmcs12_sync) {
5311 if (vmx->nested.hv_evmcs)
5312 copy_enlightened_to_vmcs12(vmx);
5313 else if (enable_shadow_vmcs)
5314 copy_shadow_to_vmcs12(vmx);
5318 * Copy over the full allocated size of vmcs12 rather than just the size
5321 if (copy_to_user(user_kvm_nested_state->data, vmcs12, VMCS12_SIZE))
5324 if (nested_cpu_has_shadow_vmcs(vmcs12) &&
5325 vmcs12->vmcs_link_pointer != -1ull) {
5326 if (copy_to_user(user_kvm_nested_state->data + VMCS12_SIZE,
5327 get_shadow_vmcs12(vcpu), VMCS12_SIZE))
5332 return kvm_state.size;
5336 * Forcibly leave nested mode in order to be able to reset the VCPU later on.
5338 void vmx_leave_nested(struct kvm_vcpu *vcpu)
5340 if (is_guest_mode(vcpu)) {
5341 to_vmx(vcpu)->nested.nested_run_pending = 0;
5342 nested_vmx_vmexit(vcpu, -1, 0, 0);
5347 static int vmx_set_nested_state(struct kvm_vcpu *vcpu,
5348 struct kvm_nested_state __user *user_kvm_nested_state,
5349 struct kvm_nested_state *kvm_state)
5351 struct vcpu_vmx *vmx = to_vmx(vcpu);
5352 struct vmcs12 *vmcs12;
5356 if (kvm_state->format != 0)
5359 if (kvm_state->flags & KVM_STATE_NESTED_EVMCS)
5360 nested_enable_evmcs(vcpu, NULL);
5362 if (!nested_vmx_allowed(vcpu))
5363 return kvm_state->vmx.vmxon_pa == -1ull ? 0 : -EINVAL;
5365 if (kvm_state->vmx.vmxon_pa == -1ull) {
5366 if (kvm_state->vmx.smm.flags)
5369 if (kvm_state->vmx.vmcs_pa != -1ull)
5372 vmx_leave_nested(vcpu);
5376 if (!page_address_valid(vcpu, kvm_state->vmx.vmxon_pa))
5379 if ((kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) &&
5380 (kvm_state->flags & KVM_STATE_NESTED_GUEST_MODE))
5383 if (kvm_state->vmx.smm.flags &
5384 ~(KVM_STATE_NESTED_SMM_GUEST_MODE | KVM_STATE_NESTED_SMM_VMXON))
5388 * SMM temporarily disables VMX, so we cannot be in guest mode,
5389 * nor can VMLAUNCH/VMRESUME be pending. Outside SMM, SMM flags
5392 if (is_smm(vcpu) ? kvm_state->flags : kvm_state->vmx.smm.flags)
5395 if ((kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) &&
5396 !(kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_VMXON))
5399 vmx_leave_nested(vcpu);
5400 if (kvm_state->vmx.vmxon_pa == -1ull)
5403 vmx->nested.vmxon_ptr = kvm_state->vmx.vmxon_pa;
5404 ret = enter_vmx_operation(vcpu);
5408 /* Empty 'VMXON' state is permitted */
5409 if (kvm_state->size < sizeof(kvm_state) + sizeof(*vmcs12))
5412 if (kvm_state->vmx.vmcs_pa != -1ull) {
5413 if (kvm_state->vmx.vmcs_pa == kvm_state->vmx.vmxon_pa ||
5414 !page_address_valid(vcpu, kvm_state->vmx.vmcs_pa))
5417 set_current_vmptr(vmx, kvm_state->vmx.vmcs_pa);
5418 } else if (kvm_state->flags & KVM_STATE_NESTED_EVMCS) {
5420 * Sync eVMCS upon entry as we may not have
5421 * HV_X64_MSR_VP_ASSIST_PAGE set up yet.
5423 vmx->nested.need_vmcs12_sync = true;
5428 if (kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_VMXON) {
5429 vmx->nested.smm.vmxon = true;
5430 vmx->nested.vmxon = false;
5432 if (kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE)
5433 vmx->nested.smm.guest_mode = true;
5436 vmcs12 = get_vmcs12(vcpu);
5437 if (copy_from_user(vmcs12, user_kvm_nested_state->data, sizeof(*vmcs12)))
5440 if (vmcs12->hdr.revision_id != VMCS12_REVISION)
5443 if (!(kvm_state->flags & KVM_STATE_NESTED_GUEST_MODE))
5446 vmx->nested.nested_run_pending =
5447 !!(kvm_state->flags & KVM_STATE_NESTED_RUN_PENDING);
5449 if (nested_cpu_has_shadow_vmcs(vmcs12) &&
5450 vmcs12->vmcs_link_pointer != -1ull) {
5451 struct vmcs12 *shadow_vmcs12 = get_shadow_vmcs12(vcpu);
5453 if (kvm_state->size < sizeof(kvm_state) + 2 * sizeof(*vmcs12))
5456 if (copy_from_user(shadow_vmcs12,
5457 user_kvm_nested_state->data + VMCS12_SIZE,
5461 if (shadow_vmcs12->hdr.revision_id != VMCS12_REVISION ||
5462 !shadow_vmcs12->hdr.shadow_vmcs)
5466 if (nested_vmx_check_vmentry_prereqs(vcpu, vmcs12) ||
5467 nested_vmx_check_vmentry_postreqs(vcpu, vmcs12, &exit_qual))
5470 vmx->nested.dirty_vmcs12 = true;
5471 ret = nested_vmx_enter_non_root_mode(vcpu, false);
5478 void nested_vmx_vcpu_setup(void)
5480 if (enable_shadow_vmcs) {
5482 * At vCPU creation, "VMWRITE to any supported field
5483 * in the VMCS" is supported, so use the more
5484 * permissive vmx_vmread_bitmap to specify both read
5485 * and write permissions for the shadow VMCS.
5487 vmcs_write64(VMREAD_BITMAP, __pa(vmx_vmread_bitmap));
5488 vmcs_write64(VMWRITE_BITMAP, __pa(vmx_vmread_bitmap));
5493 * nested_vmx_setup_ctls_msrs() sets up variables containing the values to be
5494 * returned for the various VMX controls MSRs when nested VMX is enabled.
5495 * The same values should also be used to verify that vmcs12 control fields are
5496 * valid during nested entry from L1 to L2.
5497 * Each of these control msrs has a low and high 32-bit half: A low bit is on
5498 * if the corresponding bit in the (32-bit) control field *must* be on, and a
5499 * bit in the high half is on if the corresponding bit in the control field
5500 * may be on. See also vmx_control_verify().
5502 void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps,
5506 * Note that as a general rule, the high half of the MSRs (bits in
5507 * the control fields which may be 1) should be initialized by the
5508 * intersection of the underlying hardware's MSR (i.e., features which
5509 * can be supported) and the list of features we want to expose -
5510 * because they are known to be properly supported in our code.
5511 * Also, usually, the low half of the MSRs (bits which must be 1) can
5512 * be set to 0, meaning that L1 may turn off any of these bits. The
5513 * reason is that if one of these bits is necessary, it will appear
5514 * in vmcs01 and prepare_vmcs02, when it bitwise-or's the control
5515 * fields of vmcs01 and vmcs02, will turn these bits off - and
5516 * nested_vmx_exit_reflected() will not pass related exits to L1.
5517 * These rules have exceptions below.
5520 /* pin-based controls */
5521 rdmsr(MSR_IA32_VMX_PINBASED_CTLS,
5522 msrs->pinbased_ctls_low,
5523 msrs->pinbased_ctls_high);
5524 msrs->pinbased_ctls_low |=
5525 PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
5526 msrs->pinbased_ctls_high &=
5527 PIN_BASED_EXT_INTR_MASK |
5528 PIN_BASED_NMI_EXITING |
5529 PIN_BASED_VIRTUAL_NMIS |
5530 (apicv ? PIN_BASED_POSTED_INTR : 0);
5531 msrs->pinbased_ctls_high |=
5532 PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR |
5533 PIN_BASED_VMX_PREEMPTION_TIMER;
5536 rdmsr(MSR_IA32_VMX_EXIT_CTLS,
5537 msrs->exit_ctls_low,
5538 msrs->exit_ctls_high);
5539 msrs->exit_ctls_low =
5540 VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR;
5542 msrs->exit_ctls_high &=
5543 #ifdef CONFIG_X86_64
5544 VM_EXIT_HOST_ADDR_SPACE_SIZE |
5546 VM_EXIT_LOAD_IA32_PAT | VM_EXIT_SAVE_IA32_PAT;
5547 msrs->exit_ctls_high |=
5548 VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR |
5549 VM_EXIT_LOAD_IA32_EFER | VM_EXIT_SAVE_IA32_EFER |
5550 VM_EXIT_SAVE_VMX_PREEMPTION_TIMER | VM_EXIT_ACK_INTR_ON_EXIT;
5552 /* We support free control of debug control saving. */
5553 msrs->exit_ctls_low &= ~VM_EXIT_SAVE_DEBUG_CONTROLS;
5555 /* entry controls */
5556 rdmsr(MSR_IA32_VMX_ENTRY_CTLS,
5557 msrs->entry_ctls_low,
5558 msrs->entry_ctls_high);
5559 msrs->entry_ctls_low =
5560 VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR;
5561 msrs->entry_ctls_high &=
5562 #ifdef CONFIG_X86_64
5563 VM_ENTRY_IA32E_MODE |
5565 VM_ENTRY_LOAD_IA32_PAT;
5566 msrs->entry_ctls_high |=
5567 (VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | VM_ENTRY_LOAD_IA32_EFER);
5569 /* We support free control of debug control loading. */
5570 msrs->entry_ctls_low &= ~VM_ENTRY_LOAD_DEBUG_CONTROLS;
5572 /* cpu-based controls */
5573 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS,
5574 msrs->procbased_ctls_low,
5575 msrs->procbased_ctls_high);
5576 msrs->procbased_ctls_low =
5577 CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
5578 msrs->procbased_ctls_high &=
5579 CPU_BASED_VIRTUAL_INTR_PENDING |
5580 CPU_BASED_VIRTUAL_NMI_PENDING | CPU_BASED_USE_TSC_OFFSETING |
5581 CPU_BASED_HLT_EXITING | CPU_BASED_INVLPG_EXITING |
5582 CPU_BASED_MWAIT_EXITING | CPU_BASED_CR3_LOAD_EXITING |
5583 CPU_BASED_CR3_STORE_EXITING |
5584 #ifdef CONFIG_X86_64
5585 CPU_BASED_CR8_LOAD_EXITING | CPU_BASED_CR8_STORE_EXITING |
5587 CPU_BASED_MOV_DR_EXITING | CPU_BASED_UNCOND_IO_EXITING |
5588 CPU_BASED_USE_IO_BITMAPS | CPU_BASED_MONITOR_TRAP_FLAG |
5589 CPU_BASED_MONITOR_EXITING | CPU_BASED_RDPMC_EXITING |
5590 CPU_BASED_RDTSC_EXITING | CPU_BASED_PAUSE_EXITING |
5591 CPU_BASED_TPR_SHADOW | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
5593 * We can allow some features even when not supported by the
5594 * hardware. For example, L1 can specify an MSR bitmap - and we
5595 * can use it to avoid exits to L1 - even when L0 runs L2
5596 * without MSR bitmaps.
5598 msrs->procbased_ctls_high |=
5599 CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR |
5600 CPU_BASED_USE_MSR_BITMAPS;
5602 /* We support free control of CR3 access interception. */
5603 msrs->procbased_ctls_low &=
5604 ~(CPU_BASED_CR3_LOAD_EXITING | CPU_BASED_CR3_STORE_EXITING);
5607 * secondary cpu-based controls. Do not include those that
5608 * depend on CPUID bits, they are added later by vmx_cpuid_update.
5610 if (msrs->procbased_ctls_high & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)
5611 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
5612 msrs->secondary_ctls_low,
5613 msrs->secondary_ctls_high);
5615 msrs->secondary_ctls_low = 0;
5616 msrs->secondary_ctls_high &=
5617 SECONDARY_EXEC_DESC |
5618 SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE |
5619 SECONDARY_EXEC_APIC_REGISTER_VIRT |
5620 SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY |
5621 SECONDARY_EXEC_WBINVD_EXITING;
5624 * We can emulate "VMCS shadowing," even if the hardware
5625 * doesn't support it.
5627 msrs->secondary_ctls_high |=
5628 SECONDARY_EXEC_SHADOW_VMCS;
5631 /* nested EPT: emulate EPT also to L1 */
5632 msrs->secondary_ctls_high |=
5633 SECONDARY_EXEC_ENABLE_EPT;
5634 msrs->ept_caps = VMX_EPT_PAGE_WALK_4_BIT |
5635 VMX_EPTP_WB_BIT | VMX_EPT_INVEPT_BIT;
5636 if (cpu_has_vmx_ept_execute_only())
5638 VMX_EPT_EXECUTE_ONLY_BIT;
5639 msrs->ept_caps &= ept_caps;
5640 msrs->ept_caps |= VMX_EPT_EXTENT_GLOBAL_BIT |
5641 VMX_EPT_EXTENT_CONTEXT_BIT | VMX_EPT_2MB_PAGE_BIT |
5642 VMX_EPT_1GB_PAGE_BIT;
5643 if (enable_ept_ad_bits) {
5644 msrs->secondary_ctls_high |=
5645 SECONDARY_EXEC_ENABLE_PML;
5646 msrs->ept_caps |= VMX_EPT_AD_BIT;
5650 if (cpu_has_vmx_vmfunc()) {
5651 msrs->secondary_ctls_high |=
5652 SECONDARY_EXEC_ENABLE_VMFUNC;
5654 * Advertise EPTP switching unconditionally
5655 * since we emulate it
5658 msrs->vmfunc_controls =
5659 VMX_VMFUNC_EPTP_SWITCHING;
5663 * Old versions of KVM use the single-context version without
5664 * checking for support, so declare that it is supported even
5665 * though it is treated as global context. The alternative is
5666 * not failing the single-context invvpid, and it is worse.
5669 msrs->secondary_ctls_high |=
5670 SECONDARY_EXEC_ENABLE_VPID;
5671 msrs->vpid_caps = VMX_VPID_INVVPID_BIT |
5672 VMX_VPID_EXTENT_SUPPORTED_MASK;
5675 if (enable_unrestricted_guest)
5676 msrs->secondary_ctls_high |=
5677 SECONDARY_EXEC_UNRESTRICTED_GUEST;
5679 if (flexpriority_enabled)
5680 msrs->secondary_ctls_high |=
5681 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
5683 /* miscellaneous data */
5684 rdmsr(MSR_IA32_VMX_MISC,
5687 msrs->misc_low &= VMX_MISC_SAVE_EFER_LMA;
5689 MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS |
5690 VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE |
5691 VMX_MISC_ACTIVITY_HLT;
5692 msrs->misc_high = 0;
5695 * This MSR reports some information about VMX support. We
5696 * should return information about the VMX we emulate for the
5697 * guest, and the VMCS structure we give it - not about the
5698 * VMX support of the underlying hardware.
5702 VMX_BASIC_TRUE_CTLS |
5703 ((u64)VMCS12_SIZE << VMX_BASIC_VMCS_SIZE_SHIFT) |
5704 (VMX_BASIC_MEM_TYPE_WB << VMX_BASIC_MEM_TYPE_SHIFT);
5706 if (cpu_has_vmx_basic_inout())
5707 msrs->basic |= VMX_BASIC_INOUT;
5710 * These MSRs specify bits which the guest must keep fixed on
5711 * while L1 is in VMXON mode (in L1's root mode, or running an L2).
5712 * We picked the standard core2 setting.
5714 #define VMXON_CR0_ALWAYSON (X86_CR0_PE | X86_CR0_PG | X86_CR0_NE)
5715 #define VMXON_CR4_ALWAYSON X86_CR4_VMXE
5716 msrs->cr0_fixed0 = VMXON_CR0_ALWAYSON;
5717 msrs->cr4_fixed0 = VMXON_CR4_ALWAYSON;
5719 /* These MSRs specify bits which the guest must keep fixed off. */
5720 rdmsrl(MSR_IA32_VMX_CR0_FIXED1, msrs->cr0_fixed1);
5721 rdmsrl(MSR_IA32_VMX_CR4_FIXED1, msrs->cr4_fixed1);
5723 /* highest index: VMX_PREEMPTION_TIMER_VALUE */
5724 msrs->vmcs_enum = VMCS12_MAX_FIELD_INDEX << 1;
5727 void nested_vmx_hardware_unsetup(void)
5731 if (enable_shadow_vmcs) {
5732 for (i = 0; i < VMX_BITMAP_NR; i++)
5733 free_page((unsigned long)vmx_bitmap[i]);
5737 __init int nested_vmx_hardware_setup(int (*exit_handlers[])(struct kvm_vcpu *))
5741 if (!cpu_has_vmx_shadow_vmcs())
5742 enable_shadow_vmcs = 0;
5743 if (enable_shadow_vmcs) {
5744 for (i = 0; i < VMX_BITMAP_NR; i++) {
5746 * The vmx_bitmap is not tied to a VM and so should
5747 * not be charged to a memcg.
5749 vmx_bitmap[i] = (unsigned long *)
5750 __get_free_page(GFP_KERNEL);
5751 if (!vmx_bitmap[i]) {
5752 nested_vmx_hardware_unsetup();
5757 init_vmcs_shadow_fields();
5760 exit_handlers[EXIT_REASON_VMCLEAR] = handle_vmclear,
5761 exit_handlers[EXIT_REASON_VMLAUNCH] = handle_vmlaunch,
5762 exit_handlers[EXIT_REASON_VMPTRLD] = handle_vmptrld,
5763 exit_handlers[EXIT_REASON_VMPTRST] = handle_vmptrst,
5764 exit_handlers[EXIT_REASON_VMREAD] = handle_vmread,
5765 exit_handlers[EXIT_REASON_VMRESUME] = handle_vmresume,
5766 exit_handlers[EXIT_REASON_VMWRITE] = handle_vmwrite,
5767 exit_handlers[EXIT_REASON_VMOFF] = handle_vmoff,
5768 exit_handlers[EXIT_REASON_VMON] = handle_vmon,
5769 exit_handlers[EXIT_REASON_INVEPT] = handle_invept,
5770 exit_handlers[EXIT_REASON_INVVPID] = handle_invvpid,
5771 exit_handlers[EXIT_REASON_VMFUNC] = handle_vmfunc,
5773 kvm_x86_ops->check_nested_events = vmx_check_nested_events;
5774 kvm_x86_ops->get_nested_state = vmx_get_nested_state;
5775 kvm_x86_ops->set_nested_state = vmx_set_nested_state;
5776 kvm_x86_ops->get_vmcs12_pages = nested_get_vmcs12_pages,
5777 kvm_x86_ops->nested_enable_evmcs = nested_enable_evmcs;
5778 kvm_x86_ops->nested_get_evmcs_version = nested_get_evmcs_version;