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);
22 #define CC(consistency_check) \
24 bool failed = (consistency_check); \
26 trace_kvm_nested_vmenter_failed(#consistency_check, 0); \
31 * Hyper-V requires all of these, so mark them as supported even though
32 * they are just treated the same as all-context.
34 #define VMX_VPID_EXTENT_SUPPORTED_MASK \
35 (VMX_VPID_EXTENT_INDIVIDUAL_ADDR_BIT | \
36 VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT | \
37 VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT | \
38 VMX_VPID_EXTENT_SINGLE_NON_GLOBAL_BIT)
40 #define VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE 5
47 static unsigned long *vmx_bitmap[VMX_BITMAP_NR];
49 #define vmx_vmread_bitmap (vmx_bitmap[VMX_VMREAD_BITMAP])
50 #define vmx_vmwrite_bitmap (vmx_bitmap[VMX_VMWRITE_BITMAP])
52 struct shadow_vmcs_field {
56 static struct shadow_vmcs_field shadow_read_only_fields[] = {
57 #define SHADOW_FIELD_RO(x, y) { x, offsetof(struct vmcs12, y) },
58 #include "vmcs_shadow_fields.h"
60 static int max_shadow_read_only_fields =
61 ARRAY_SIZE(shadow_read_only_fields);
63 static struct shadow_vmcs_field shadow_read_write_fields[] = {
64 #define SHADOW_FIELD_RW(x, y) { x, offsetof(struct vmcs12, y) },
65 #include "vmcs_shadow_fields.h"
67 static int max_shadow_read_write_fields =
68 ARRAY_SIZE(shadow_read_write_fields);
70 static void init_vmcs_shadow_fields(void)
74 memset(vmx_vmread_bitmap, 0xff, PAGE_SIZE);
75 memset(vmx_vmwrite_bitmap, 0xff, PAGE_SIZE);
77 for (i = j = 0; i < max_shadow_read_only_fields; i++) {
78 struct shadow_vmcs_field entry = shadow_read_only_fields[i];
79 u16 field = entry.encoding;
81 if (vmcs_field_width(field) == VMCS_FIELD_WIDTH_U64 &&
82 (i + 1 == max_shadow_read_only_fields ||
83 shadow_read_only_fields[i + 1].encoding != field + 1))
84 pr_err("Missing field from shadow_read_only_field %x\n",
87 clear_bit(field, vmx_vmread_bitmap);
92 entry.offset += sizeof(u32);
94 shadow_read_only_fields[j++] = entry;
96 max_shadow_read_only_fields = j;
98 for (i = j = 0; i < max_shadow_read_write_fields; i++) {
99 struct shadow_vmcs_field entry = shadow_read_write_fields[i];
100 u16 field = entry.encoding;
102 if (vmcs_field_width(field) == VMCS_FIELD_WIDTH_U64 &&
103 (i + 1 == max_shadow_read_write_fields ||
104 shadow_read_write_fields[i + 1].encoding != field + 1))
105 pr_err("Missing field from shadow_read_write_field %x\n",
108 WARN_ONCE(field >= GUEST_ES_AR_BYTES &&
109 field <= GUEST_TR_AR_BYTES,
110 "Update vmcs12_write_any() to drop reserved bits from AR_BYTES");
113 * PML and the preemption timer can be emulated, but the
114 * processor cannot vmwrite to fields that don't exist
118 case GUEST_PML_INDEX:
119 if (!cpu_has_vmx_pml())
122 case VMX_PREEMPTION_TIMER_VALUE:
123 if (!cpu_has_vmx_preemption_timer())
126 case GUEST_INTR_STATUS:
127 if (!cpu_has_vmx_apicv())
134 clear_bit(field, vmx_vmwrite_bitmap);
135 clear_bit(field, vmx_vmread_bitmap);
140 entry.offset += sizeof(u32);
142 shadow_read_write_fields[j++] = entry;
144 max_shadow_read_write_fields = j;
148 * The following 3 functions, nested_vmx_succeed()/failValid()/failInvalid(),
149 * set the success or error code of an emulated VMX instruction (as specified
150 * by Vol 2B, VMX Instruction Reference, "Conventions"), and skip the emulated
153 static int nested_vmx_succeed(struct kvm_vcpu *vcpu)
155 vmx_set_rflags(vcpu, vmx_get_rflags(vcpu)
156 & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
157 X86_EFLAGS_ZF | X86_EFLAGS_SF | X86_EFLAGS_OF));
158 return kvm_skip_emulated_instruction(vcpu);
161 static int nested_vmx_failInvalid(struct kvm_vcpu *vcpu)
163 vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
164 & ~(X86_EFLAGS_PF | X86_EFLAGS_AF | X86_EFLAGS_ZF |
165 X86_EFLAGS_SF | X86_EFLAGS_OF))
167 return kvm_skip_emulated_instruction(vcpu);
170 static int nested_vmx_failValid(struct kvm_vcpu *vcpu,
171 u32 vm_instruction_error)
173 struct vcpu_vmx *vmx = to_vmx(vcpu);
176 * failValid writes the error number to the current VMCS, which
177 * can't be done if there isn't a current VMCS.
179 if (vmx->nested.current_vmptr == -1ull && !vmx->nested.hv_evmcs)
180 return nested_vmx_failInvalid(vcpu);
182 vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
183 & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
184 X86_EFLAGS_SF | X86_EFLAGS_OF))
186 get_vmcs12(vcpu)->vm_instruction_error = vm_instruction_error;
188 * We don't need to force a shadow sync because
189 * VM_INSTRUCTION_ERROR is not shadowed
191 return kvm_skip_emulated_instruction(vcpu);
194 static void nested_vmx_abort(struct kvm_vcpu *vcpu, u32 indicator)
196 /* TODO: not to reset guest simply here. */
197 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
198 pr_debug_ratelimited("kvm: nested vmx abort, indicator %d\n", indicator);
201 static void vmx_disable_shadow_vmcs(struct vcpu_vmx *vmx)
203 secondary_exec_controls_clearbit(vmx, SECONDARY_EXEC_SHADOW_VMCS);
204 vmcs_write64(VMCS_LINK_POINTER, -1ull);
205 vmx->nested.need_vmcs12_to_shadow_sync = false;
208 static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
210 struct vcpu_vmx *vmx = to_vmx(vcpu);
212 if (!vmx->nested.hv_evmcs)
215 kvm_vcpu_unmap(vcpu, &vmx->nested.hv_evmcs_map, true);
216 vmx->nested.hv_evmcs_vmptr = -1ull;
217 vmx->nested.hv_evmcs = NULL;
221 * Free whatever needs to be freed from vmx->nested when L1 goes down, or
222 * just stops using VMX.
224 static void free_nested(struct kvm_vcpu *vcpu)
226 struct vcpu_vmx *vmx = to_vmx(vcpu);
228 if (!vmx->nested.vmxon && !vmx->nested.smm.vmxon)
231 kvm_clear_request(KVM_REQ_GET_VMCS12_PAGES, vcpu);
233 vmx->nested.vmxon = false;
234 vmx->nested.smm.vmxon = false;
235 free_vpid(vmx->nested.vpid02);
236 vmx->nested.posted_intr_nv = -1;
237 vmx->nested.current_vmptr = -1ull;
238 if (enable_shadow_vmcs) {
239 vmx_disable_shadow_vmcs(vmx);
240 vmcs_clear(vmx->vmcs01.shadow_vmcs);
241 free_vmcs(vmx->vmcs01.shadow_vmcs);
242 vmx->vmcs01.shadow_vmcs = NULL;
244 kfree(vmx->nested.cached_vmcs12);
245 vmx->nested.cached_vmcs12 = NULL;
246 kfree(vmx->nested.cached_shadow_vmcs12);
247 vmx->nested.cached_shadow_vmcs12 = NULL;
248 /* Unpin physical memory we referred to in the vmcs02 */
249 if (vmx->nested.apic_access_page) {
250 kvm_release_page_dirty(vmx->nested.apic_access_page);
251 vmx->nested.apic_access_page = NULL;
253 kvm_vcpu_unmap(vcpu, &vmx->nested.virtual_apic_map, true);
254 kvm_vcpu_unmap(vcpu, &vmx->nested.pi_desc_map, true);
255 vmx->nested.pi_desc = NULL;
257 kvm_mmu_free_roots(vcpu, &vcpu->arch.guest_mmu, KVM_MMU_ROOTS_ALL);
259 nested_release_evmcs(vcpu);
261 free_loaded_vmcs(&vmx->nested.vmcs02);
264 static void vmx_sync_vmcs_host_state(struct vcpu_vmx *vmx,
265 struct loaded_vmcs *prev)
267 struct vmcs_host_state *dest, *src;
269 if (unlikely(!vmx->guest_state_loaded))
272 src = &prev->host_state;
273 dest = &vmx->loaded_vmcs->host_state;
275 vmx_set_host_fs_gs(dest, src->fs_sel, src->gs_sel, src->fs_base, src->gs_base);
276 dest->ldt_sel = src->ldt_sel;
278 dest->ds_sel = src->ds_sel;
279 dest->es_sel = src->es_sel;
283 static void vmx_switch_vmcs(struct kvm_vcpu *vcpu, struct loaded_vmcs *vmcs)
285 struct vcpu_vmx *vmx = to_vmx(vcpu);
286 struct loaded_vmcs *prev;
289 if (vmx->loaded_vmcs == vmcs)
293 prev = vmx->loaded_vmcs;
294 vmx->loaded_vmcs = vmcs;
295 vmx_vcpu_load_vmcs(vcpu, cpu);
296 vmx_sync_vmcs_host_state(vmx, prev);
299 vmx_segment_cache_clear(vmx);
303 * Ensure that the current vmcs of the logical processor is the
304 * vmcs01 of the vcpu before calling free_nested().
306 void nested_vmx_free_vcpu(struct kvm_vcpu *vcpu)
309 vmx_leave_nested(vcpu);
310 vmx_switch_vmcs(vcpu, &to_vmx(vcpu)->vmcs01);
315 static void nested_ept_inject_page_fault(struct kvm_vcpu *vcpu,
316 struct x86_exception *fault)
318 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
319 struct vcpu_vmx *vmx = to_vmx(vcpu);
321 unsigned long exit_qualification = vcpu->arch.exit_qualification;
323 if (vmx->nested.pml_full) {
324 exit_reason = EXIT_REASON_PML_FULL;
325 vmx->nested.pml_full = false;
326 exit_qualification &= INTR_INFO_UNBLOCK_NMI;
327 } else if (fault->error_code & PFERR_RSVD_MASK)
328 exit_reason = EXIT_REASON_EPT_MISCONFIG;
330 exit_reason = EXIT_REASON_EPT_VIOLATION;
332 nested_vmx_vmexit(vcpu, exit_reason, 0, exit_qualification);
333 vmcs12->guest_physical_address = fault->address;
336 static void nested_ept_init_mmu_context(struct kvm_vcpu *vcpu)
338 WARN_ON(mmu_is_nested(vcpu));
340 vcpu->arch.mmu = &vcpu->arch.guest_mmu;
341 kvm_init_shadow_ept_mmu(vcpu,
342 to_vmx(vcpu)->nested.msrs.ept_caps &
343 VMX_EPT_EXECUTE_ONLY_BIT,
344 nested_ept_ad_enabled(vcpu),
345 nested_ept_get_cr3(vcpu));
346 vcpu->arch.mmu->set_cr3 = vmx_set_cr3;
347 vcpu->arch.mmu->get_cr3 = nested_ept_get_cr3;
348 vcpu->arch.mmu->inject_page_fault = nested_ept_inject_page_fault;
349 vcpu->arch.mmu->get_pdptr = kvm_pdptr_read;
351 vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu;
354 static void nested_ept_uninit_mmu_context(struct kvm_vcpu *vcpu)
356 vcpu->arch.mmu = &vcpu->arch.root_mmu;
357 vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;
360 static bool nested_vmx_is_page_fault_vmexit(struct vmcs12 *vmcs12,
363 bool inequality, bit;
365 bit = (vmcs12->exception_bitmap & (1u << PF_VECTOR)) != 0;
367 (error_code & vmcs12->page_fault_error_code_mask) !=
368 vmcs12->page_fault_error_code_match;
369 return inequality ^ bit;
374 * KVM wants to inject page-faults which it got to the guest. This function
375 * checks whether in a nested guest, we need to inject them to L1 or L2.
377 static int nested_vmx_check_exception(struct kvm_vcpu *vcpu, unsigned long *exit_qual)
379 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
380 unsigned int nr = vcpu->arch.exception.nr;
381 bool has_payload = vcpu->arch.exception.has_payload;
382 unsigned long payload = vcpu->arch.exception.payload;
384 if (nr == PF_VECTOR) {
385 if (vcpu->arch.exception.nested_apf) {
386 *exit_qual = vcpu->arch.apf.nested_apf_token;
389 if (nested_vmx_is_page_fault_vmexit(vmcs12,
390 vcpu->arch.exception.error_code)) {
391 *exit_qual = has_payload ? payload : vcpu->arch.cr2;
394 } else if (vmcs12->exception_bitmap & (1u << nr)) {
395 if (nr == DB_VECTOR) {
397 payload = vcpu->arch.dr6;
398 payload &= ~(DR6_FIXED_1 | DR6_BT);
401 *exit_qual = payload;
411 static void vmx_inject_page_fault_nested(struct kvm_vcpu *vcpu,
412 struct x86_exception *fault)
414 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
416 WARN_ON(!is_guest_mode(vcpu));
418 if (nested_vmx_is_page_fault_vmexit(vmcs12, fault->error_code) &&
419 !to_vmx(vcpu)->nested.nested_run_pending) {
420 vmcs12->vm_exit_intr_error_code = fault->error_code;
421 nested_vmx_vmexit(vcpu, EXIT_REASON_EXCEPTION_NMI,
422 PF_VECTOR | INTR_TYPE_HARD_EXCEPTION |
423 INTR_INFO_DELIVER_CODE_MASK | INTR_INFO_VALID_MASK,
426 kvm_inject_page_fault(vcpu, fault);
430 static bool page_address_valid(struct kvm_vcpu *vcpu, gpa_t gpa)
432 return PAGE_ALIGNED(gpa) && !(gpa >> cpuid_maxphyaddr(vcpu));
435 static int nested_vmx_check_io_bitmap_controls(struct kvm_vcpu *vcpu,
436 struct vmcs12 *vmcs12)
438 if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS))
441 if (CC(!page_address_valid(vcpu, vmcs12->io_bitmap_a)) ||
442 CC(!page_address_valid(vcpu, vmcs12->io_bitmap_b)))
448 static int nested_vmx_check_msr_bitmap_controls(struct kvm_vcpu *vcpu,
449 struct vmcs12 *vmcs12)
451 if (!nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS))
454 if (CC(!page_address_valid(vcpu, vmcs12->msr_bitmap)))
460 static int nested_vmx_check_tpr_shadow_controls(struct kvm_vcpu *vcpu,
461 struct vmcs12 *vmcs12)
463 if (!nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW))
466 if (CC(!page_address_valid(vcpu, vmcs12->virtual_apic_page_addr)))
473 * Check if MSR is intercepted for L01 MSR bitmap.
475 static bool msr_write_intercepted_l01(struct kvm_vcpu *vcpu, u32 msr)
477 unsigned long *msr_bitmap;
478 int f = sizeof(unsigned long);
480 if (!cpu_has_vmx_msr_bitmap())
483 msr_bitmap = to_vmx(vcpu)->vmcs01.msr_bitmap;
486 return !!test_bit(msr, msr_bitmap + 0x800 / f);
487 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
489 return !!test_bit(msr, msr_bitmap + 0xc00 / f);
496 * If a msr is allowed by L0, we should check whether it is allowed by L1.
497 * The corresponding bit will be cleared unless both of L0 and L1 allow it.
499 static void nested_vmx_disable_intercept_for_msr(unsigned long *msr_bitmap_l1,
500 unsigned long *msr_bitmap_nested,
503 int f = sizeof(unsigned long);
506 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
507 * have the write-low and read-high bitmap offsets the wrong way round.
508 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
511 if (type & MSR_TYPE_R &&
512 !test_bit(msr, msr_bitmap_l1 + 0x000 / f))
514 __clear_bit(msr, msr_bitmap_nested + 0x000 / f);
516 if (type & MSR_TYPE_W &&
517 !test_bit(msr, msr_bitmap_l1 + 0x800 / f))
519 __clear_bit(msr, msr_bitmap_nested + 0x800 / f);
521 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
523 if (type & MSR_TYPE_R &&
524 !test_bit(msr, msr_bitmap_l1 + 0x400 / f))
526 __clear_bit(msr, msr_bitmap_nested + 0x400 / f);
528 if (type & MSR_TYPE_W &&
529 !test_bit(msr, msr_bitmap_l1 + 0xc00 / f))
531 __clear_bit(msr, msr_bitmap_nested + 0xc00 / f);
536 static inline void enable_x2apic_msr_intercepts(unsigned long *msr_bitmap) {
539 for (msr = 0x800; msr <= 0x8ff; msr += BITS_PER_LONG) {
540 unsigned word = msr / BITS_PER_LONG;
542 msr_bitmap[word] = ~0;
543 msr_bitmap[word + (0x800 / sizeof(long))] = ~0;
548 * Merge L0's and L1's MSR bitmap, return false to indicate that
549 * we do not use the hardware.
551 static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu,
552 struct vmcs12 *vmcs12)
555 unsigned long *msr_bitmap_l1;
556 unsigned long *msr_bitmap_l0 = to_vmx(vcpu)->nested.vmcs02.msr_bitmap;
557 struct kvm_host_map *map = &to_vmx(vcpu)->nested.msr_bitmap_map;
559 /* Nothing to do if the MSR bitmap is not in use. */
560 if (!cpu_has_vmx_msr_bitmap() ||
561 !nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS))
564 if (kvm_vcpu_map(vcpu, gpa_to_gfn(vmcs12->msr_bitmap), map))
567 msr_bitmap_l1 = (unsigned long *)map->hva;
570 * To keep the control flow simple, pay eight 8-byte writes (sixteen
571 * 4-byte writes on 32-bit systems) up front to enable intercepts for
572 * the x2APIC MSR range and selectively disable them below.
574 enable_x2apic_msr_intercepts(msr_bitmap_l0);
576 if (nested_cpu_has_virt_x2apic_mode(vmcs12)) {
577 if (nested_cpu_has_apic_reg_virt(vmcs12)) {
579 * L0 need not intercept reads for MSRs between 0x800
580 * and 0x8ff, it just lets the processor take the value
581 * from the virtual-APIC page; take those 256 bits
582 * directly from the L1 bitmap.
584 for (msr = 0x800; msr <= 0x8ff; msr += BITS_PER_LONG) {
585 unsigned word = msr / BITS_PER_LONG;
587 msr_bitmap_l0[word] = msr_bitmap_l1[word];
591 nested_vmx_disable_intercept_for_msr(
592 msr_bitmap_l1, msr_bitmap_l0,
593 X2APIC_MSR(APIC_TASKPRI),
594 MSR_TYPE_R | MSR_TYPE_W);
596 if (nested_cpu_has_vid(vmcs12)) {
597 nested_vmx_disable_intercept_for_msr(
598 msr_bitmap_l1, msr_bitmap_l0,
599 X2APIC_MSR(APIC_EOI),
601 nested_vmx_disable_intercept_for_msr(
602 msr_bitmap_l1, msr_bitmap_l0,
603 X2APIC_MSR(APIC_SELF_IPI),
608 /* KVM unconditionally exposes the FS/GS base MSRs to L1. */
609 nested_vmx_disable_intercept_for_msr(msr_bitmap_l1, msr_bitmap_l0,
610 MSR_FS_BASE, MSR_TYPE_RW);
612 nested_vmx_disable_intercept_for_msr(msr_bitmap_l1, msr_bitmap_l0,
613 MSR_GS_BASE, MSR_TYPE_RW);
615 nested_vmx_disable_intercept_for_msr(msr_bitmap_l1, msr_bitmap_l0,
616 MSR_KERNEL_GS_BASE, MSR_TYPE_RW);
619 * Checking the L0->L1 bitmap is trying to verify two things:
621 * 1. L0 gave a permission to L1 to actually passthrough the MSR. This
622 * ensures that we do not accidentally generate an L02 MSR bitmap
623 * from the L12 MSR bitmap that is too permissive.
624 * 2. That L1 or L2s have actually used the MSR. This avoids
625 * unnecessarily merging of the bitmap if the MSR is unused. This
626 * works properly because we only update the L01 MSR bitmap lazily.
627 * So even if L0 should pass L1 these MSRs, the L01 bitmap is only
628 * updated to reflect this when L1 (or its L2s) actually write to
631 if (!msr_write_intercepted_l01(vcpu, MSR_IA32_SPEC_CTRL))
632 nested_vmx_disable_intercept_for_msr(
633 msr_bitmap_l1, msr_bitmap_l0,
635 MSR_TYPE_R | MSR_TYPE_W);
637 if (!msr_write_intercepted_l01(vcpu, MSR_IA32_PRED_CMD))
638 nested_vmx_disable_intercept_for_msr(
639 msr_bitmap_l1, msr_bitmap_l0,
643 kvm_vcpu_unmap(vcpu, &to_vmx(vcpu)->nested.msr_bitmap_map, false);
648 static void nested_cache_shadow_vmcs12(struct kvm_vcpu *vcpu,
649 struct vmcs12 *vmcs12)
651 struct kvm_host_map map;
652 struct vmcs12 *shadow;
654 if (!nested_cpu_has_shadow_vmcs(vmcs12) ||
655 vmcs12->vmcs_link_pointer == -1ull)
658 shadow = get_shadow_vmcs12(vcpu);
660 if (kvm_vcpu_map(vcpu, gpa_to_gfn(vmcs12->vmcs_link_pointer), &map))
663 memcpy(shadow, map.hva, VMCS12_SIZE);
664 kvm_vcpu_unmap(vcpu, &map, false);
667 static void nested_flush_cached_shadow_vmcs12(struct kvm_vcpu *vcpu,
668 struct vmcs12 *vmcs12)
670 struct vcpu_vmx *vmx = to_vmx(vcpu);
672 if (!nested_cpu_has_shadow_vmcs(vmcs12) ||
673 vmcs12->vmcs_link_pointer == -1ull)
676 kvm_write_guest(vmx->vcpu.kvm, vmcs12->vmcs_link_pointer,
677 get_shadow_vmcs12(vcpu), VMCS12_SIZE);
681 * In nested virtualization, check if L1 has set
682 * VM_EXIT_ACK_INTR_ON_EXIT
684 static bool nested_exit_intr_ack_set(struct kvm_vcpu *vcpu)
686 return get_vmcs12(vcpu)->vm_exit_controls &
687 VM_EXIT_ACK_INTR_ON_EXIT;
690 static bool nested_exit_on_nmi(struct kvm_vcpu *vcpu)
692 return nested_cpu_has_nmi_exiting(get_vmcs12(vcpu));
695 static int nested_vmx_check_apic_access_controls(struct kvm_vcpu *vcpu,
696 struct vmcs12 *vmcs12)
698 if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) &&
699 CC(!page_address_valid(vcpu, vmcs12->apic_access_addr)))
705 static int nested_vmx_check_apicv_controls(struct kvm_vcpu *vcpu,
706 struct vmcs12 *vmcs12)
708 if (!nested_cpu_has_virt_x2apic_mode(vmcs12) &&
709 !nested_cpu_has_apic_reg_virt(vmcs12) &&
710 !nested_cpu_has_vid(vmcs12) &&
711 !nested_cpu_has_posted_intr(vmcs12))
715 * If virtualize x2apic mode is enabled,
716 * virtualize apic access must be disabled.
718 if (CC(nested_cpu_has_virt_x2apic_mode(vmcs12) &&
719 nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)))
723 * If virtual interrupt delivery is enabled,
724 * we must exit on external interrupts.
726 if (CC(nested_cpu_has_vid(vmcs12) && !nested_exit_on_intr(vcpu)))
730 * bits 15:8 should be zero in posted_intr_nv,
731 * the descriptor address has been already checked
732 * in nested_get_vmcs12_pages.
734 * bits 5:0 of posted_intr_desc_addr should be zero.
736 if (nested_cpu_has_posted_intr(vmcs12) &&
737 (CC(!nested_cpu_has_vid(vmcs12)) ||
738 CC(!nested_exit_intr_ack_set(vcpu)) ||
739 CC((vmcs12->posted_intr_nv & 0xff00)) ||
740 CC((vmcs12->posted_intr_desc_addr & 0x3f)) ||
741 CC((vmcs12->posted_intr_desc_addr >> cpuid_maxphyaddr(vcpu)))))
744 /* tpr shadow is needed by all apicv features. */
745 if (CC(!nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)))
751 static int nested_vmx_check_msr_switch(struct kvm_vcpu *vcpu,
758 maxphyaddr = cpuid_maxphyaddr(vcpu);
759 if (!IS_ALIGNED(addr, 16) || addr >> maxphyaddr ||
760 (addr + count * sizeof(struct vmx_msr_entry) - 1) >> maxphyaddr)
766 static int nested_vmx_check_exit_msr_switch_controls(struct kvm_vcpu *vcpu,
767 struct vmcs12 *vmcs12)
769 if (CC(nested_vmx_check_msr_switch(vcpu,
770 vmcs12->vm_exit_msr_load_count,
771 vmcs12->vm_exit_msr_load_addr)) ||
772 CC(nested_vmx_check_msr_switch(vcpu,
773 vmcs12->vm_exit_msr_store_count,
774 vmcs12->vm_exit_msr_store_addr)))
780 static int nested_vmx_check_entry_msr_switch_controls(struct kvm_vcpu *vcpu,
781 struct vmcs12 *vmcs12)
783 if (CC(nested_vmx_check_msr_switch(vcpu,
784 vmcs12->vm_entry_msr_load_count,
785 vmcs12->vm_entry_msr_load_addr)))
791 static int nested_vmx_check_pml_controls(struct kvm_vcpu *vcpu,
792 struct vmcs12 *vmcs12)
794 if (!nested_cpu_has_pml(vmcs12))
797 if (CC(!nested_cpu_has_ept(vmcs12)) ||
798 CC(!page_address_valid(vcpu, vmcs12->pml_address)))
804 static int nested_vmx_check_unrestricted_guest_controls(struct kvm_vcpu *vcpu,
805 struct vmcs12 *vmcs12)
807 if (CC(nested_cpu_has2(vmcs12, SECONDARY_EXEC_UNRESTRICTED_GUEST) &&
808 !nested_cpu_has_ept(vmcs12)))
813 static int nested_vmx_check_mode_based_ept_exec_controls(struct kvm_vcpu *vcpu,
814 struct vmcs12 *vmcs12)
816 if (CC(nested_cpu_has2(vmcs12, SECONDARY_EXEC_MODE_BASED_EPT_EXEC) &&
817 !nested_cpu_has_ept(vmcs12)))
822 static int nested_vmx_check_shadow_vmcs_controls(struct kvm_vcpu *vcpu,
823 struct vmcs12 *vmcs12)
825 if (!nested_cpu_has_shadow_vmcs(vmcs12))
828 if (CC(!page_address_valid(vcpu, vmcs12->vmread_bitmap)) ||
829 CC(!page_address_valid(vcpu, vmcs12->vmwrite_bitmap)))
835 static int nested_vmx_msr_check_common(struct kvm_vcpu *vcpu,
836 struct vmx_msr_entry *e)
838 /* x2APIC MSR accesses are not allowed */
839 if (CC(vcpu->arch.apic_base & X2APIC_ENABLE && e->index >> 8 == 0x8))
841 if (CC(e->index == MSR_IA32_UCODE_WRITE) || /* SDM Table 35-2 */
842 CC(e->index == MSR_IA32_UCODE_REV))
844 if (CC(e->reserved != 0))
849 static int nested_vmx_load_msr_check(struct kvm_vcpu *vcpu,
850 struct vmx_msr_entry *e)
852 if (CC(e->index == MSR_FS_BASE) ||
853 CC(e->index == MSR_GS_BASE) ||
854 CC(e->index == MSR_IA32_SMM_MONITOR_CTL) || /* SMM is not supported */
855 nested_vmx_msr_check_common(vcpu, e))
860 static int nested_vmx_store_msr_check(struct kvm_vcpu *vcpu,
861 struct vmx_msr_entry *e)
863 if (CC(e->index == MSR_IA32_SMBASE) || /* SMM is not supported */
864 nested_vmx_msr_check_common(vcpu, e))
870 * Load guest's/host's msr at nested entry/exit.
871 * return 0 for success, entry index for failure.
873 static u32 nested_vmx_load_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count)
876 struct vmx_msr_entry e;
878 for (i = 0; i < count; i++) {
879 if (kvm_vcpu_read_guest(vcpu, gpa + i * sizeof(e),
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_load_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 if (kvm_set_msr(vcpu, e.index, e.value)) {
893 pr_debug_ratelimited(
894 "%s cannot write MSR (%u, 0x%x, 0x%llx)\n",
895 __func__, i, e.index, e.value);
904 static int nested_vmx_store_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count)
908 struct vmx_msr_entry e;
910 for (i = 0; i < count; i++) {
911 if (kvm_vcpu_read_guest(vcpu,
913 &e, 2 * sizeof(u32))) {
914 pr_debug_ratelimited(
915 "%s cannot read MSR entry (%u, 0x%08llx)\n",
916 __func__, i, gpa + i * sizeof(e));
919 if (nested_vmx_store_msr_check(vcpu, &e)) {
920 pr_debug_ratelimited(
921 "%s check failed (%u, 0x%x, 0x%x)\n",
922 __func__, i, e.index, e.reserved);
925 if (kvm_get_msr(vcpu, e.index, &data)) {
926 pr_debug_ratelimited(
927 "%s cannot read MSR (%u, 0x%x)\n",
928 __func__, i, e.index);
931 if (kvm_vcpu_write_guest(vcpu,
932 gpa + i * sizeof(e) +
933 offsetof(struct vmx_msr_entry, value),
934 &data, sizeof(data))) {
935 pr_debug_ratelimited(
936 "%s cannot write MSR (%u, 0x%x, 0x%llx)\n",
937 __func__, i, e.index, data);
944 static bool nested_cr3_valid(struct kvm_vcpu *vcpu, unsigned long val)
946 unsigned long invalid_mask;
948 invalid_mask = (~0ULL) << cpuid_maxphyaddr(vcpu);
949 return (val & invalid_mask) == 0;
953 * Load guest's/host's cr3 at nested entry/exit. nested_ept is true if we are
954 * emulating VM entry into a guest with EPT enabled.
955 * Returns 0 on success, 1 on failure. Invalid state exit qualification code
956 * is assigned to entry_failure_code on failure.
958 static int nested_vmx_load_cr3(struct kvm_vcpu *vcpu, unsigned long cr3, bool nested_ept,
959 u32 *entry_failure_code)
961 if (cr3 != kvm_read_cr3(vcpu) || (!nested_ept && pdptrs_changed(vcpu))) {
962 if (CC(!nested_cr3_valid(vcpu, cr3))) {
963 *entry_failure_code = ENTRY_FAIL_DEFAULT;
968 * If PAE paging and EPT are both on, CR3 is not used by the CPU and
969 * must not be dereferenced.
971 if (is_pae_paging(vcpu) && !nested_ept) {
972 if (CC(!load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3))) {
973 *entry_failure_code = ENTRY_FAIL_PDPTE;
980 kvm_mmu_new_cr3(vcpu, cr3, false);
982 vcpu->arch.cr3 = cr3;
983 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
985 kvm_init_mmu(vcpu, false);
991 * Returns if KVM is able to config CPU to tag TLB entries
992 * populated by L2 differently than TLB entries populated
995 * If L1 uses EPT, then TLB entries are tagged with different EPTP.
997 * If L1 uses VPID and we allocated a vpid02, TLB entries are tagged
998 * with different VPID (L1 entries are tagged with vmx->vpid
999 * while L2 entries are tagged with vmx->nested.vpid02).
1001 static bool nested_has_guest_tlb_tag(struct kvm_vcpu *vcpu)
1003 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
1005 return nested_cpu_has_ept(vmcs12) ||
1006 (nested_cpu_has_vpid(vmcs12) && to_vmx(vcpu)->nested.vpid02);
1009 static u16 nested_get_vpid02(struct kvm_vcpu *vcpu)
1011 struct vcpu_vmx *vmx = to_vmx(vcpu);
1013 return vmx->nested.vpid02 ? vmx->nested.vpid02 : vmx->vpid;
1017 static inline bool vmx_control_verify(u32 control, u32 low, u32 high)
1019 return fixed_bits_valid(control, low, high);
1022 static inline u64 vmx_control_msr(u32 low, u32 high)
1024 return low | ((u64)high << 32);
1027 static bool is_bitwise_subset(u64 superset, u64 subset, u64 mask)
1032 return (superset | subset) == superset;
1035 static int vmx_restore_vmx_basic(struct vcpu_vmx *vmx, u64 data)
1037 const u64 feature_and_reserved =
1038 /* feature (except bit 48; see below) */
1039 BIT_ULL(49) | BIT_ULL(54) | BIT_ULL(55) |
1041 BIT_ULL(31) | GENMASK_ULL(47, 45) | GENMASK_ULL(63, 56);
1042 u64 vmx_basic = vmx->nested.msrs.basic;
1044 if (!is_bitwise_subset(vmx_basic, data, feature_and_reserved))
1048 * KVM does not emulate a version of VMX that constrains physical
1049 * addresses of VMX structures (e.g. VMCS) to 32-bits.
1051 if (data & BIT_ULL(48))
1054 if (vmx_basic_vmcs_revision_id(vmx_basic) !=
1055 vmx_basic_vmcs_revision_id(data))
1058 if (vmx_basic_vmcs_size(vmx_basic) > vmx_basic_vmcs_size(data))
1061 vmx->nested.msrs.basic = data;
1066 vmx_restore_control_msr(struct vcpu_vmx *vmx, u32 msr_index, u64 data)
1071 switch (msr_index) {
1072 case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
1073 lowp = &vmx->nested.msrs.pinbased_ctls_low;
1074 highp = &vmx->nested.msrs.pinbased_ctls_high;
1076 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
1077 lowp = &vmx->nested.msrs.procbased_ctls_low;
1078 highp = &vmx->nested.msrs.procbased_ctls_high;
1080 case MSR_IA32_VMX_TRUE_EXIT_CTLS:
1081 lowp = &vmx->nested.msrs.exit_ctls_low;
1082 highp = &vmx->nested.msrs.exit_ctls_high;
1084 case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
1085 lowp = &vmx->nested.msrs.entry_ctls_low;
1086 highp = &vmx->nested.msrs.entry_ctls_high;
1088 case MSR_IA32_VMX_PROCBASED_CTLS2:
1089 lowp = &vmx->nested.msrs.secondary_ctls_low;
1090 highp = &vmx->nested.msrs.secondary_ctls_high;
1096 supported = vmx_control_msr(*lowp, *highp);
1098 /* Check must-be-1 bits are still 1. */
1099 if (!is_bitwise_subset(data, supported, GENMASK_ULL(31, 0)))
1102 /* Check must-be-0 bits are still 0. */
1103 if (!is_bitwise_subset(supported, data, GENMASK_ULL(63, 32)))
1107 *highp = data >> 32;
1111 static int vmx_restore_vmx_misc(struct vcpu_vmx *vmx, u64 data)
1113 const u64 feature_and_reserved_bits =
1115 BIT_ULL(5) | GENMASK_ULL(8, 6) | BIT_ULL(14) | BIT_ULL(15) |
1116 BIT_ULL(28) | BIT_ULL(29) | BIT_ULL(30) |
1118 GENMASK_ULL(13, 9) | BIT_ULL(31);
1121 vmx_misc = vmx_control_msr(vmx->nested.msrs.misc_low,
1122 vmx->nested.msrs.misc_high);
1124 if (!is_bitwise_subset(vmx_misc, data, feature_and_reserved_bits))
1127 if ((vmx->nested.msrs.pinbased_ctls_high &
1128 PIN_BASED_VMX_PREEMPTION_TIMER) &&
1129 vmx_misc_preemption_timer_rate(data) !=
1130 vmx_misc_preemption_timer_rate(vmx_misc))
1133 if (vmx_misc_cr3_count(data) > vmx_misc_cr3_count(vmx_misc))
1136 if (vmx_misc_max_msr(data) > vmx_misc_max_msr(vmx_misc))
1139 if (vmx_misc_mseg_revid(data) != vmx_misc_mseg_revid(vmx_misc))
1142 vmx->nested.msrs.misc_low = data;
1143 vmx->nested.msrs.misc_high = data >> 32;
1148 static int vmx_restore_vmx_ept_vpid_cap(struct vcpu_vmx *vmx, u64 data)
1150 u64 vmx_ept_vpid_cap;
1152 vmx_ept_vpid_cap = vmx_control_msr(vmx->nested.msrs.ept_caps,
1153 vmx->nested.msrs.vpid_caps);
1155 /* Every bit is either reserved or a feature bit. */
1156 if (!is_bitwise_subset(vmx_ept_vpid_cap, data, -1ULL))
1159 vmx->nested.msrs.ept_caps = data;
1160 vmx->nested.msrs.vpid_caps = data >> 32;
1164 static int vmx_restore_fixed0_msr(struct vcpu_vmx *vmx, u32 msr_index, u64 data)
1168 switch (msr_index) {
1169 case MSR_IA32_VMX_CR0_FIXED0:
1170 msr = &vmx->nested.msrs.cr0_fixed0;
1172 case MSR_IA32_VMX_CR4_FIXED0:
1173 msr = &vmx->nested.msrs.cr4_fixed0;
1180 * 1 bits (which indicates bits which "must-be-1" during VMX operation)
1181 * must be 1 in the restored value.
1183 if (!is_bitwise_subset(data, *msr, -1ULL))
1191 * Called when userspace is restoring VMX MSRs.
1193 * Returns 0 on success, non-0 otherwise.
1195 int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
1197 struct vcpu_vmx *vmx = to_vmx(vcpu);
1200 * Don't allow changes to the VMX capability MSRs while the vCPU
1201 * is in VMX operation.
1203 if (vmx->nested.vmxon)
1206 switch (msr_index) {
1207 case MSR_IA32_VMX_BASIC:
1208 return vmx_restore_vmx_basic(vmx, data);
1209 case MSR_IA32_VMX_PINBASED_CTLS:
1210 case MSR_IA32_VMX_PROCBASED_CTLS:
1211 case MSR_IA32_VMX_EXIT_CTLS:
1212 case MSR_IA32_VMX_ENTRY_CTLS:
1214 * The "non-true" VMX capability MSRs are generated from the
1215 * "true" MSRs, so we do not support restoring them directly.
1217 * If userspace wants to emulate VMX_BASIC[55]=0, userspace
1218 * should restore the "true" MSRs with the must-be-1 bits
1219 * set according to the SDM Vol 3. A.2 "RESERVED CONTROLS AND
1220 * DEFAULT SETTINGS".
1223 case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
1224 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
1225 case MSR_IA32_VMX_TRUE_EXIT_CTLS:
1226 case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
1227 case MSR_IA32_VMX_PROCBASED_CTLS2:
1228 return vmx_restore_control_msr(vmx, msr_index, data);
1229 case MSR_IA32_VMX_MISC:
1230 return vmx_restore_vmx_misc(vmx, data);
1231 case MSR_IA32_VMX_CR0_FIXED0:
1232 case MSR_IA32_VMX_CR4_FIXED0:
1233 return vmx_restore_fixed0_msr(vmx, msr_index, data);
1234 case MSR_IA32_VMX_CR0_FIXED1:
1235 case MSR_IA32_VMX_CR4_FIXED1:
1237 * These MSRs are generated based on the vCPU's CPUID, so we
1238 * do not support restoring them directly.
1241 case MSR_IA32_VMX_EPT_VPID_CAP:
1242 return vmx_restore_vmx_ept_vpid_cap(vmx, data);
1243 case MSR_IA32_VMX_VMCS_ENUM:
1244 vmx->nested.msrs.vmcs_enum = data;
1246 case MSR_IA32_VMX_VMFUNC:
1247 if (data & ~vmx->nested.msrs.vmfunc_controls)
1249 vmx->nested.msrs.vmfunc_controls = data;
1253 * The rest of the VMX capability MSRs do not support restore.
1259 /* Returns 0 on success, non-0 otherwise. */
1260 int vmx_get_vmx_msr(struct nested_vmx_msrs *msrs, u32 msr_index, u64 *pdata)
1262 switch (msr_index) {
1263 case MSR_IA32_VMX_BASIC:
1264 *pdata = msrs->basic;
1266 case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
1267 case MSR_IA32_VMX_PINBASED_CTLS:
1268 *pdata = vmx_control_msr(
1269 msrs->pinbased_ctls_low,
1270 msrs->pinbased_ctls_high);
1271 if (msr_index == MSR_IA32_VMX_PINBASED_CTLS)
1272 *pdata |= PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
1274 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
1275 case MSR_IA32_VMX_PROCBASED_CTLS:
1276 *pdata = vmx_control_msr(
1277 msrs->procbased_ctls_low,
1278 msrs->procbased_ctls_high);
1279 if (msr_index == MSR_IA32_VMX_PROCBASED_CTLS)
1280 *pdata |= CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
1282 case MSR_IA32_VMX_TRUE_EXIT_CTLS:
1283 case MSR_IA32_VMX_EXIT_CTLS:
1284 *pdata = vmx_control_msr(
1285 msrs->exit_ctls_low,
1286 msrs->exit_ctls_high);
1287 if (msr_index == MSR_IA32_VMX_EXIT_CTLS)
1288 *pdata |= VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR;
1290 case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
1291 case MSR_IA32_VMX_ENTRY_CTLS:
1292 *pdata = vmx_control_msr(
1293 msrs->entry_ctls_low,
1294 msrs->entry_ctls_high);
1295 if (msr_index == MSR_IA32_VMX_ENTRY_CTLS)
1296 *pdata |= VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR;
1298 case MSR_IA32_VMX_MISC:
1299 *pdata = vmx_control_msr(
1303 case MSR_IA32_VMX_CR0_FIXED0:
1304 *pdata = msrs->cr0_fixed0;
1306 case MSR_IA32_VMX_CR0_FIXED1:
1307 *pdata = msrs->cr0_fixed1;
1309 case MSR_IA32_VMX_CR4_FIXED0:
1310 *pdata = msrs->cr4_fixed0;
1312 case MSR_IA32_VMX_CR4_FIXED1:
1313 *pdata = msrs->cr4_fixed1;
1315 case MSR_IA32_VMX_VMCS_ENUM:
1316 *pdata = msrs->vmcs_enum;
1318 case MSR_IA32_VMX_PROCBASED_CTLS2:
1319 *pdata = vmx_control_msr(
1320 msrs->secondary_ctls_low,
1321 msrs->secondary_ctls_high);
1323 case MSR_IA32_VMX_EPT_VPID_CAP:
1324 *pdata = msrs->ept_caps |
1325 ((u64)msrs->vpid_caps << 32);
1327 case MSR_IA32_VMX_VMFUNC:
1328 *pdata = msrs->vmfunc_controls;
1338 * Copy the writable VMCS shadow fields back to the VMCS12, in case they have
1339 * been modified by the L1 guest. Note, "writable" in this context means
1340 * "writable by the guest", i.e. tagged SHADOW_FIELD_RW; the set of
1341 * fields tagged SHADOW_FIELD_RO may or may not align with the "read-only"
1342 * VM-exit information fields (which are actually writable if the vCPU is
1343 * configured to support "VMWRITE to any supported field in the VMCS").
1345 static void copy_shadow_to_vmcs12(struct vcpu_vmx *vmx)
1347 struct vmcs *shadow_vmcs = vmx->vmcs01.shadow_vmcs;
1348 struct vmcs12 *vmcs12 = get_vmcs12(&vmx->vcpu);
1349 struct shadow_vmcs_field field;
1353 if (WARN_ON(!shadow_vmcs))
1358 vmcs_load(shadow_vmcs);
1360 for (i = 0; i < max_shadow_read_write_fields; i++) {
1361 field = shadow_read_write_fields[i];
1362 val = __vmcs_readl(field.encoding);
1363 vmcs12_write_any(vmcs12, field.encoding, field.offset, val);
1366 vmcs_clear(shadow_vmcs);
1367 vmcs_load(vmx->loaded_vmcs->vmcs);
1372 static void copy_vmcs12_to_shadow(struct vcpu_vmx *vmx)
1374 const struct shadow_vmcs_field *fields[] = {
1375 shadow_read_write_fields,
1376 shadow_read_only_fields
1378 const int max_fields[] = {
1379 max_shadow_read_write_fields,
1380 max_shadow_read_only_fields
1382 struct vmcs *shadow_vmcs = vmx->vmcs01.shadow_vmcs;
1383 struct vmcs12 *vmcs12 = get_vmcs12(&vmx->vcpu);
1384 struct shadow_vmcs_field field;
1388 if (WARN_ON(!shadow_vmcs))
1391 vmcs_load(shadow_vmcs);
1393 for (q = 0; q < ARRAY_SIZE(fields); q++) {
1394 for (i = 0; i < max_fields[q]; i++) {
1395 field = fields[q][i];
1396 val = vmcs12_read_any(vmcs12, field.encoding,
1398 __vmcs_writel(field.encoding, val);
1402 vmcs_clear(shadow_vmcs);
1403 vmcs_load(vmx->loaded_vmcs->vmcs);
1406 static int copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx)
1408 struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
1409 struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
1411 /* HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE */
1412 vmcs12->tpr_threshold = evmcs->tpr_threshold;
1413 vmcs12->guest_rip = evmcs->guest_rip;
1415 if (unlikely(!(evmcs->hv_clean_fields &
1416 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC))) {
1417 vmcs12->guest_rsp = evmcs->guest_rsp;
1418 vmcs12->guest_rflags = evmcs->guest_rflags;
1419 vmcs12->guest_interruptibility_info =
1420 evmcs->guest_interruptibility_info;
1423 if (unlikely(!(evmcs->hv_clean_fields &
1424 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC))) {
1425 vmcs12->cpu_based_vm_exec_control =
1426 evmcs->cpu_based_vm_exec_control;
1429 if (unlikely(!(evmcs->hv_clean_fields &
1430 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EXCPN))) {
1431 vmcs12->exception_bitmap = evmcs->exception_bitmap;
1434 if (unlikely(!(evmcs->hv_clean_fields &
1435 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_ENTRY))) {
1436 vmcs12->vm_entry_controls = evmcs->vm_entry_controls;
1439 if (unlikely(!(evmcs->hv_clean_fields &
1440 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT))) {
1441 vmcs12->vm_entry_intr_info_field =
1442 evmcs->vm_entry_intr_info_field;
1443 vmcs12->vm_entry_exception_error_code =
1444 evmcs->vm_entry_exception_error_code;
1445 vmcs12->vm_entry_instruction_len =
1446 evmcs->vm_entry_instruction_len;
1449 if (unlikely(!(evmcs->hv_clean_fields &
1450 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1))) {
1451 vmcs12->host_ia32_pat = evmcs->host_ia32_pat;
1452 vmcs12->host_ia32_efer = evmcs->host_ia32_efer;
1453 vmcs12->host_cr0 = evmcs->host_cr0;
1454 vmcs12->host_cr3 = evmcs->host_cr3;
1455 vmcs12->host_cr4 = evmcs->host_cr4;
1456 vmcs12->host_ia32_sysenter_esp = evmcs->host_ia32_sysenter_esp;
1457 vmcs12->host_ia32_sysenter_eip = evmcs->host_ia32_sysenter_eip;
1458 vmcs12->host_rip = evmcs->host_rip;
1459 vmcs12->host_ia32_sysenter_cs = evmcs->host_ia32_sysenter_cs;
1460 vmcs12->host_es_selector = evmcs->host_es_selector;
1461 vmcs12->host_cs_selector = evmcs->host_cs_selector;
1462 vmcs12->host_ss_selector = evmcs->host_ss_selector;
1463 vmcs12->host_ds_selector = evmcs->host_ds_selector;
1464 vmcs12->host_fs_selector = evmcs->host_fs_selector;
1465 vmcs12->host_gs_selector = evmcs->host_gs_selector;
1466 vmcs12->host_tr_selector = evmcs->host_tr_selector;
1469 if (unlikely(!(evmcs->hv_clean_fields &
1470 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1))) {
1471 vmcs12->pin_based_vm_exec_control =
1472 evmcs->pin_based_vm_exec_control;
1473 vmcs12->vm_exit_controls = evmcs->vm_exit_controls;
1474 vmcs12->secondary_vm_exec_control =
1475 evmcs->secondary_vm_exec_control;
1478 if (unlikely(!(evmcs->hv_clean_fields &
1479 HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP))) {
1480 vmcs12->io_bitmap_a = evmcs->io_bitmap_a;
1481 vmcs12->io_bitmap_b = evmcs->io_bitmap_b;
1484 if (unlikely(!(evmcs->hv_clean_fields &
1485 HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP))) {
1486 vmcs12->msr_bitmap = evmcs->msr_bitmap;
1489 if (unlikely(!(evmcs->hv_clean_fields &
1490 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2))) {
1491 vmcs12->guest_es_base = evmcs->guest_es_base;
1492 vmcs12->guest_cs_base = evmcs->guest_cs_base;
1493 vmcs12->guest_ss_base = evmcs->guest_ss_base;
1494 vmcs12->guest_ds_base = evmcs->guest_ds_base;
1495 vmcs12->guest_fs_base = evmcs->guest_fs_base;
1496 vmcs12->guest_gs_base = evmcs->guest_gs_base;
1497 vmcs12->guest_ldtr_base = evmcs->guest_ldtr_base;
1498 vmcs12->guest_tr_base = evmcs->guest_tr_base;
1499 vmcs12->guest_gdtr_base = evmcs->guest_gdtr_base;
1500 vmcs12->guest_idtr_base = evmcs->guest_idtr_base;
1501 vmcs12->guest_es_limit = evmcs->guest_es_limit;
1502 vmcs12->guest_cs_limit = evmcs->guest_cs_limit;
1503 vmcs12->guest_ss_limit = evmcs->guest_ss_limit;
1504 vmcs12->guest_ds_limit = evmcs->guest_ds_limit;
1505 vmcs12->guest_fs_limit = evmcs->guest_fs_limit;
1506 vmcs12->guest_gs_limit = evmcs->guest_gs_limit;
1507 vmcs12->guest_ldtr_limit = evmcs->guest_ldtr_limit;
1508 vmcs12->guest_tr_limit = evmcs->guest_tr_limit;
1509 vmcs12->guest_gdtr_limit = evmcs->guest_gdtr_limit;
1510 vmcs12->guest_idtr_limit = evmcs->guest_idtr_limit;
1511 vmcs12->guest_es_ar_bytes = evmcs->guest_es_ar_bytes;
1512 vmcs12->guest_cs_ar_bytes = evmcs->guest_cs_ar_bytes;
1513 vmcs12->guest_ss_ar_bytes = evmcs->guest_ss_ar_bytes;
1514 vmcs12->guest_ds_ar_bytes = evmcs->guest_ds_ar_bytes;
1515 vmcs12->guest_fs_ar_bytes = evmcs->guest_fs_ar_bytes;
1516 vmcs12->guest_gs_ar_bytes = evmcs->guest_gs_ar_bytes;
1517 vmcs12->guest_ldtr_ar_bytes = evmcs->guest_ldtr_ar_bytes;
1518 vmcs12->guest_tr_ar_bytes = evmcs->guest_tr_ar_bytes;
1519 vmcs12->guest_es_selector = evmcs->guest_es_selector;
1520 vmcs12->guest_cs_selector = evmcs->guest_cs_selector;
1521 vmcs12->guest_ss_selector = evmcs->guest_ss_selector;
1522 vmcs12->guest_ds_selector = evmcs->guest_ds_selector;
1523 vmcs12->guest_fs_selector = evmcs->guest_fs_selector;
1524 vmcs12->guest_gs_selector = evmcs->guest_gs_selector;
1525 vmcs12->guest_ldtr_selector = evmcs->guest_ldtr_selector;
1526 vmcs12->guest_tr_selector = evmcs->guest_tr_selector;
1529 if (unlikely(!(evmcs->hv_clean_fields &
1530 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2))) {
1531 vmcs12->tsc_offset = evmcs->tsc_offset;
1532 vmcs12->virtual_apic_page_addr = evmcs->virtual_apic_page_addr;
1533 vmcs12->xss_exit_bitmap = evmcs->xss_exit_bitmap;
1536 if (unlikely(!(evmcs->hv_clean_fields &
1537 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR))) {
1538 vmcs12->cr0_guest_host_mask = evmcs->cr0_guest_host_mask;
1539 vmcs12->cr4_guest_host_mask = evmcs->cr4_guest_host_mask;
1540 vmcs12->cr0_read_shadow = evmcs->cr0_read_shadow;
1541 vmcs12->cr4_read_shadow = evmcs->cr4_read_shadow;
1542 vmcs12->guest_cr0 = evmcs->guest_cr0;
1543 vmcs12->guest_cr3 = evmcs->guest_cr3;
1544 vmcs12->guest_cr4 = evmcs->guest_cr4;
1545 vmcs12->guest_dr7 = evmcs->guest_dr7;
1548 if (unlikely(!(evmcs->hv_clean_fields &
1549 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER))) {
1550 vmcs12->host_fs_base = evmcs->host_fs_base;
1551 vmcs12->host_gs_base = evmcs->host_gs_base;
1552 vmcs12->host_tr_base = evmcs->host_tr_base;
1553 vmcs12->host_gdtr_base = evmcs->host_gdtr_base;
1554 vmcs12->host_idtr_base = evmcs->host_idtr_base;
1555 vmcs12->host_rsp = evmcs->host_rsp;
1558 if (unlikely(!(evmcs->hv_clean_fields &
1559 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT))) {
1560 vmcs12->ept_pointer = evmcs->ept_pointer;
1561 vmcs12->virtual_processor_id = evmcs->virtual_processor_id;
1564 if (unlikely(!(evmcs->hv_clean_fields &
1565 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1))) {
1566 vmcs12->vmcs_link_pointer = evmcs->vmcs_link_pointer;
1567 vmcs12->guest_ia32_debugctl = evmcs->guest_ia32_debugctl;
1568 vmcs12->guest_ia32_pat = evmcs->guest_ia32_pat;
1569 vmcs12->guest_ia32_efer = evmcs->guest_ia32_efer;
1570 vmcs12->guest_pdptr0 = evmcs->guest_pdptr0;
1571 vmcs12->guest_pdptr1 = evmcs->guest_pdptr1;
1572 vmcs12->guest_pdptr2 = evmcs->guest_pdptr2;
1573 vmcs12->guest_pdptr3 = evmcs->guest_pdptr3;
1574 vmcs12->guest_pending_dbg_exceptions =
1575 evmcs->guest_pending_dbg_exceptions;
1576 vmcs12->guest_sysenter_esp = evmcs->guest_sysenter_esp;
1577 vmcs12->guest_sysenter_eip = evmcs->guest_sysenter_eip;
1578 vmcs12->guest_bndcfgs = evmcs->guest_bndcfgs;
1579 vmcs12->guest_activity_state = evmcs->guest_activity_state;
1580 vmcs12->guest_sysenter_cs = evmcs->guest_sysenter_cs;
1585 * vmcs12->vm_exit_msr_store_addr = evmcs->vm_exit_msr_store_addr;
1586 * vmcs12->vm_exit_msr_load_addr = evmcs->vm_exit_msr_load_addr;
1587 * vmcs12->vm_entry_msr_load_addr = evmcs->vm_entry_msr_load_addr;
1588 * vmcs12->cr3_target_value0 = evmcs->cr3_target_value0;
1589 * vmcs12->cr3_target_value1 = evmcs->cr3_target_value1;
1590 * vmcs12->cr3_target_value2 = evmcs->cr3_target_value2;
1591 * vmcs12->cr3_target_value3 = evmcs->cr3_target_value3;
1592 * vmcs12->page_fault_error_code_mask =
1593 * evmcs->page_fault_error_code_mask;
1594 * vmcs12->page_fault_error_code_match =
1595 * evmcs->page_fault_error_code_match;
1596 * vmcs12->cr3_target_count = evmcs->cr3_target_count;
1597 * vmcs12->vm_exit_msr_store_count = evmcs->vm_exit_msr_store_count;
1598 * vmcs12->vm_exit_msr_load_count = evmcs->vm_exit_msr_load_count;
1599 * vmcs12->vm_entry_msr_load_count = evmcs->vm_entry_msr_load_count;
1604 * vmcs12->guest_physical_address = evmcs->guest_physical_address;
1605 * vmcs12->vm_instruction_error = evmcs->vm_instruction_error;
1606 * vmcs12->vm_exit_reason = evmcs->vm_exit_reason;
1607 * vmcs12->vm_exit_intr_info = evmcs->vm_exit_intr_info;
1608 * vmcs12->vm_exit_intr_error_code = evmcs->vm_exit_intr_error_code;
1609 * vmcs12->idt_vectoring_info_field = evmcs->idt_vectoring_info_field;
1610 * vmcs12->idt_vectoring_error_code = evmcs->idt_vectoring_error_code;
1611 * vmcs12->vm_exit_instruction_len = evmcs->vm_exit_instruction_len;
1612 * vmcs12->vmx_instruction_info = evmcs->vmx_instruction_info;
1613 * vmcs12->exit_qualification = evmcs->exit_qualification;
1614 * vmcs12->guest_linear_address = evmcs->guest_linear_address;
1616 * Not present in struct vmcs12:
1617 * vmcs12->exit_io_instruction_ecx = evmcs->exit_io_instruction_ecx;
1618 * vmcs12->exit_io_instruction_esi = evmcs->exit_io_instruction_esi;
1619 * vmcs12->exit_io_instruction_edi = evmcs->exit_io_instruction_edi;
1620 * vmcs12->exit_io_instruction_eip = evmcs->exit_io_instruction_eip;
1626 static int copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
1628 struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12;
1629 struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs;
1632 * Should not be changed by KVM:
1634 * evmcs->host_es_selector = vmcs12->host_es_selector;
1635 * evmcs->host_cs_selector = vmcs12->host_cs_selector;
1636 * evmcs->host_ss_selector = vmcs12->host_ss_selector;
1637 * evmcs->host_ds_selector = vmcs12->host_ds_selector;
1638 * evmcs->host_fs_selector = vmcs12->host_fs_selector;
1639 * evmcs->host_gs_selector = vmcs12->host_gs_selector;
1640 * evmcs->host_tr_selector = vmcs12->host_tr_selector;
1641 * evmcs->host_ia32_pat = vmcs12->host_ia32_pat;
1642 * evmcs->host_ia32_efer = vmcs12->host_ia32_efer;
1643 * evmcs->host_cr0 = vmcs12->host_cr0;
1644 * evmcs->host_cr3 = vmcs12->host_cr3;
1645 * evmcs->host_cr4 = vmcs12->host_cr4;
1646 * evmcs->host_ia32_sysenter_esp = vmcs12->host_ia32_sysenter_esp;
1647 * evmcs->host_ia32_sysenter_eip = vmcs12->host_ia32_sysenter_eip;
1648 * evmcs->host_rip = vmcs12->host_rip;
1649 * evmcs->host_ia32_sysenter_cs = vmcs12->host_ia32_sysenter_cs;
1650 * evmcs->host_fs_base = vmcs12->host_fs_base;
1651 * evmcs->host_gs_base = vmcs12->host_gs_base;
1652 * evmcs->host_tr_base = vmcs12->host_tr_base;
1653 * evmcs->host_gdtr_base = vmcs12->host_gdtr_base;
1654 * evmcs->host_idtr_base = vmcs12->host_idtr_base;
1655 * evmcs->host_rsp = vmcs12->host_rsp;
1656 * sync_vmcs02_to_vmcs12() doesn't read these:
1657 * evmcs->io_bitmap_a = vmcs12->io_bitmap_a;
1658 * evmcs->io_bitmap_b = vmcs12->io_bitmap_b;
1659 * evmcs->msr_bitmap = vmcs12->msr_bitmap;
1660 * evmcs->ept_pointer = vmcs12->ept_pointer;
1661 * evmcs->xss_exit_bitmap = vmcs12->xss_exit_bitmap;
1662 * evmcs->vm_exit_msr_store_addr = vmcs12->vm_exit_msr_store_addr;
1663 * evmcs->vm_exit_msr_load_addr = vmcs12->vm_exit_msr_load_addr;
1664 * evmcs->vm_entry_msr_load_addr = vmcs12->vm_entry_msr_load_addr;
1665 * evmcs->cr3_target_value0 = vmcs12->cr3_target_value0;
1666 * evmcs->cr3_target_value1 = vmcs12->cr3_target_value1;
1667 * evmcs->cr3_target_value2 = vmcs12->cr3_target_value2;
1668 * evmcs->cr3_target_value3 = vmcs12->cr3_target_value3;
1669 * evmcs->tpr_threshold = vmcs12->tpr_threshold;
1670 * evmcs->virtual_processor_id = vmcs12->virtual_processor_id;
1671 * evmcs->exception_bitmap = vmcs12->exception_bitmap;
1672 * evmcs->vmcs_link_pointer = vmcs12->vmcs_link_pointer;
1673 * evmcs->pin_based_vm_exec_control = vmcs12->pin_based_vm_exec_control;
1674 * evmcs->vm_exit_controls = vmcs12->vm_exit_controls;
1675 * evmcs->secondary_vm_exec_control = vmcs12->secondary_vm_exec_control;
1676 * evmcs->page_fault_error_code_mask =
1677 * vmcs12->page_fault_error_code_mask;
1678 * evmcs->page_fault_error_code_match =
1679 * vmcs12->page_fault_error_code_match;
1680 * evmcs->cr3_target_count = vmcs12->cr3_target_count;
1681 * evmcs->virtual_apic_page_addr = vmcs12->virtual_apic_page_addr;
1682 * evmcs->tsc_offset = vmcs12->tsc_offset;
1683 * evmcs->guest_ia32_debugctl = vmcs12->guest_ia32_debugctl;
1684 * evmcs->cr0_guest_host_mask = vmcs12->cr0_guest_host_mask;
1685 * evmcs->cr4_guest_host_mask = vmcs12->cr4_guest_host_mask;
1686 * evmcs->cr0_read_shadow = vmcs12->cr0_read_shadow;
1687 * evmcs->cr4_read_shadow = vmcs12->cr4_read_shadow;
1688 * evmcs->vm_exit_msr_store_count = vmcs12->vm_exit_msr_store_count;
1689 * evmcs->vm_exit_msr_load_count = vmcs12->vm_exit_msr_load_count;
1690 * evmcs->vm_entry_msr_load_count = vmcs12->vm_entry_msr_load_count;
1692 * Not present in struct vmcs12:
1693 * evmcs->exit_io_instruction_ecx = vmcs12->exit_io_instruction_ecx;
1694 * evmcs->exit_io_instruction_esi = vmcs12->exit_io_instruction_esi;
1695 * evmcs->exit_io_instruction_edi = vmcs12->exit_io_instruction_edi;
1696 * evmcs->exit_io_instruction_eip = vmcs12->exit_io_instruction_eip;
1699 evmcs->guest_es_selector = vmcs12->guest_es_selector;
1700 evmcs->guest_cs_selector = vmcs12->guest_cs_selector;
1701 evmcs->guest_ss_selector = vmcs12->guest_ss_selector;
1702 evmcs->guest_ds_selector = vmcs12->guest_ds_selector;
1703 evmcs->guest_fs_selector = vmcs12->guest_fs_selector;
1704 evmcs->guest_gs_selector = vmcs12->guest_gs_selector;
1705 evmcs->guest_ldtr_selector = vmcs12->guest_ldtr_selector;
1706 evmcs->guest_tr_selector = vmcs12->guest_tr_selector;
1708 evmcs->guest_es_limit = vmcs12->guest_es_limit;
1709 evmcs->guest_cs_limit = vmcs12->guest_cs_limit;
1710 evmcs->guest_ss_limit = vmcs12->guest_ss_limit;
1711 evmcs->guest_ds_limit = vmcs12->guest_ds_limit;
1712 evmcs->guest_fs_limit = vmcs12->guest_fs_limit;
1713 evmcs->guest_gs_limit = vmcs12->guest_gs_limit;
1714 evmcs->guest_ldtr_limit = vmcs12->guest_ldtr_limit;
1715 evmcs->guest_tr_limit = vmcs12->guest_tr_limit;
1716 evmcs->guest_gdtr_limit = vmcs12->guest_gdtr_limit;
1717 evmcs->guest_idtr_limit = vmcs12->guest_idtr_limit;
1719 evmcs->guest_es_ar_bytes = vmcs12->guest_es_ar_bytes;
1720 evmcs->guest_cs_ar_bytes = vmcs12->guest_cs_ar_bytes;
1721 evmcs->guest_ss_ar_bytes = vmcs12->guest_ss_ar_bytes;
1722 evmcs->guest_ds_ar_bytes = vmcs12->guest_ds_ar_bytes;
1723 evmcs->guest_fs_ar_bytes = vmcs12->guest_fs_ar_bytes;
1724 evmcs->guest_gs_ar_bytes = vmcs12->guest_gs_ar_bytes;
1725 evmcs->guest_ldtr_ar_bytes = vmcs12->guest_ldtr_ar_bytes;
1726 evmcs->guest_tr_ar_bytes = vmcs12->guest_tr_ar_bytes;
1728 evmcs->guest_es_base = vmcs12->guest_es_base;
1729 evmcs->guest_cs_base = vmcs12->guest_cs_base;
1730 evmcs->guest_ss_base = vmcs12->guest_ss_base;
1731 evmcs->guest_ds_base = vmcs12->guest_ds_base;
1732 evmcs->guest_fs_base = vmcs12->guest_fs_base;
1733 evmcs->guest_gs_base = vmcs12->guest_gs_base;
1734 evmcs->guest_ldtr_base = vmcs12->guest_ldtr_base;
1735 evmcs->guest_tr_base = vmcs12->guest_tr_base;
1736 evmcs->guest_gdtr_base = vmcs12->guest_gdtr_base;
1737 evmcs->guest_idtr_base = vmcs12->guest_idtr_base;
1739 evmcs->guest_ia32_pat = vmcs12->guest_ia32_pat;
1740 evmcs->guest_ia32_efer = vmcs12->guest_ia32_efer;
1742 evmcs->guest_pdptr0 = vmcs12->guest_pdptr0;
1743 evmcs->guest_pdptr1 = vmcs12->guest_pdptr1;
1744 evmcs->guest_pdptr2 = vmcs12->guest_pdptr2;
1745 evmcs->guest_pdptr3 = vmcs12->guest_pdptr3;
1747 evmcs->guest_pending_dbg_exceptions =
1748 vmcs12->guest_pending_dbg_exceptions;
1749 evmcs->guest_sysenter_esp = vmcs12->guest_sysenter_esp;
1750 evmcs->guest_sysenter_eip = vmcs12->guest_sysenter_eip;
1752 evmcs->guest_activity_state = vmcs12->guest_activity_state;
1753 evmcs->guest_sysenter_cs = vmcs12->guest_sysenter_cs;
1755 evmcs->guest_cr0 = vmcs12->guest_cr0;
1756 evmcs->guest_cr3 = vmcs12->guest_cr3;
1757 evmcs->guest_cr4 = vmcs12->guest_cr4;
1758 evmcs->guest_dr7 = vmcs12->guest_dr7;
1760 evmcs->guest_physical_address = vmcs12->guest_physical_address;
1762 evmcs->vm_instruction_error = vmcs12->vm_instruction_error;
1763 evmcs->vm_exit_reason = vmcs12->vm_exit_reason;
1764 evmcs->vm_exit_intr_info = vmcs12->vm_exit_intr_info;
1765 evmcs->vm_exit_intr_error_code = vmcs12->vm_exit_intr_error_code;
1766 evmcs->idt_vectoring_info_field = vmcs12->idt_vectoring_info_field;
1767 evmcs->idt_vectoring_error_code = vmcs12->idt_vectoring_error_code;
1768 evmcs->vm_exit_instruction_len = vmcs12->vm_exit_instruction_len;
1769 evmcs->vmx_instruction_info = vmcs12->vmx_instruction_info;
1771 evmcs->exit_qualification = vmcs12->exit_qualification;
1773 evmcs->guest_linear_address = vmcs12->guest_linear_address;
1774 evmcs->guest_rsp = vmcs12->guest_rsp;
1775 evmcs->guest_rflags = vmcs12->guest_rflags;
1777 evmcs->guest_interruptibility_info =
1778 vmcs12->guest_interruptibility_info;
1779 evmcs->cpu_based_vm_exec_control = vmcs12->cpu_based_vm_exec_control;
1780 evmcs->vm_entry_controls = vmcs12->vm_entry_controls;
1781 evmcs->vm_entry_intr_info_field = vmcs12->vm_entry_intr_info_field;
1782 evmcs->vm_entry_exception_error_code =
1783 vmcs12->vm_entry_exception_error_code;
1784 evmcs->vm_entry_instruction_len = vmcs12->vm_entry_instruction_len;
1786 evmcs->guest_rip = vmcs12->guest_rip;
1788 evmcs->guest_bndcfgs = vmcs12->guest_bndcfgs;
1794 * This is an equivalent of the nested hypervisor executing the vmptrld
1797 static int nested_vmx_handle_enlightened_vmptrld(struct kvm_vcpu *vcpu,
1800 struct vcpu_vmx *vmx = to_vmx(vcpu);
1801 bool evmcs_gpa_changed = false;
1804 if (likely(!vmx->nested.enlightened_vmcs_enabled))
1807 if (!nested_enlightened_vmentry(vcpu, &evmcs_gpa))
1810 if (unlikely(evmcs_gpa != vmx->nested.hv_evmcs_vmptr)) {
1811 if (!vmx->nested.hv_evmcs)
1812 vmx->nested.current_vmptr = -1ull;
1814 nested_release_evmcs(vcpu);
1816 if (kvm_vcpu_map(vcpu, gpa_to_gfn(evmcs_gpa),
1817 &vmx->nested.hv_evmcs_map))
1820 vmx->nested.hv_evmcs = vmx->nested.hv_evmcs_map.hva;
1823 * Currently, KVM only supports eVMCS version 1
1824 * (== KVM_EVMCS_VERSION) and thus we expect guest to set this
1825 * value to first u32 field of eVMCS which should specify eVMCS
1828 * Guest should be aware of supported eVMCS versions by host by
1829 * examining CPUID.0x4000000A.EAX[0:15]. Host userspace VMM is
1830 * expected to set this CPUID leaf according to the value
1831 * returned in vmcs_version from nested_enable_evmcs().
1833 * However, it turns out that Microsoft Hyper-V fails to comply
1834 * to their own invented interface: When Hyper-V use eVMCS, it
1835 * just sets first u32 field of eVMCS to revision_id specified
1836 * in MSR_IA32_VMX_BASIC. Instead of used eVMCS version number
1837 * which is one of the supported versions specified in
1838 * CPUID.0x4000000A.EAX[0:15].
1840 * To overcome Hyper-V bug, we accept here either a supported
1841 * eVMCS version or VMCS12 revision_id as valid values for first
1842 * u32 field of eVMCS.
1844 if ((vmx->nested.hv_evmcs->revision_id != KVM_EVMCS_VERSION) &&
1845 (vmx->nested.hv_evmcs->revision_id != VMCS12_REVISION)) {
1846 nested_release_evmcs(vcpu);
1850 vmx->nested.dirty_vmcs12 = true;
1851 vmx->nested.hv_evmcs_vmptr = evmcs_gpa;
1853 evmcs_gpa_changed = true;
1855 * Unlike normal vmcs12, enlightened vmcs12 is not fully
1856 * reloaded from guest's memory (read only fields, fields not
1857 * present in struct hv_enlightened_vmcs, ...). Make sure there
1861 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
1862 memset(vmcs12, 0, sizeof(*vmcs12));
1863 vmcs12->hdr.revision_id = VMCS12_REVISION;
1869 * Clean fields data can't de used on VMLAUNCH and when we switch
1870 * between different L2 guests as KVM keeps a single VMCS12 per L1.
1872 if (from_launch || evmcs_gpa_changed)
1873 vmx->nested.hv_evmcs->hv_clean_fields &=
1874 ~HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
1879 void nested_sync_vmcs12_to_shadow(struct kvm_vcpu *vcpu)
1881 struct vcpu_vmx *vmx = to_vmx(vcpu);
1884 * hv_evmcs may end up being not mapped after migration (when
1885 * L2 was running), map it here to make sure vmcs12 changes are
1886 * properly reflected.
1888 if (vmx->nested.enlightened_vmcs_enabled && !vmx->nested.hv_evmcs)
1889 nested_vmx_handle_enlightened_vmptrld(vcpu, false);
1891 if (vmx->nested.hv_evmcs) {
1892 copy_vmcs12_to_enlightened(vmx);
1893 /* All fields are clean */
1894 vmx->nested.hv_evmcs->hv_clean_fields |=
1895 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
1897 copy_vmcs12_to_shadow(vmx);
1900 vmx->nested.need_vmcs12_to_shadow_sync = false;
1903 static enum hrtimer_restart vmx_preemption_timer_fn(struct hrtimer *timer)
1905 struct vcpu_vmx *vmx =
1906 container_of(timer, struct vcpu_vmx, nested.preemption_timer);
1908 vmx->nested.preemption_timer_expired = true;
1909 kvm_make_request(KVM_REQ_EVENT, &vmx->vcpu);
1910 kvm_vcpu_kick(&vmx->vcpu);
1912 return HRTIMER_NORESTART;
1915 static void vmx_start_preemption_timer(struct kvm_vcpu *vcpu)
1917 u64 preemption_timeout = get_vmcs12(vcpu)->vmx_preemption_timer_value;
1918 struct vcpu_vmx *vmx = to_vmx(vcpu);
1921 * A timer value of zero is architecturally guaranteed to cause
1922 * a VMExit prior to executing any instructions in the guest.
1924 if (preemption_timeout == 0) {
1925 vmx_preemption_timer_fn(&vmx->nested.preemption_timer);
1929 if (vcpu->arch.virtual_tsc_khz == 0)
1932 preemption_timeout <<= VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE;
1933 preemption_timeout *= 1000000;
1934 do_div(preemption_timeout, vcpu->arch.virtual_tsc_khz);
1935 hrtimer_start(&vmx->nested.preemption_timer,
1936 ns_to_ktime(preemption_timeout), HRTIMER_MODE_REL);
1939 static u64 nested_vmx_calc_efer(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
1941 if (vmx->nested.nested_run_pending &&
1942 (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_EFER))
1943 return vmcs12->guest_ia32_efer;
1944 else if (vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE)
1945 return vmx->vcpu.arch.efer | (EFER_LMA | EFER_LME);
1947 return vmx->vcpu.arch.efer & ~(EFER_LMA | EFER_LME);
1950 static void prepare_vmcs02_constant_state(struct vcpu_vmx *vmx)
1953 * If vmcs02 hasn't been initialized, set the constant vmcs02 state
1954 * according to L0's settings (vmcs12 is irrelevant here). Host
1955 * fields that come from L0 and are not constant, e.g. HOST_CR3,
1956 * will be set as needed prior to VMLAUNCH/VMRESUME.
1958 if (vmx->nested.vmcs02_initialized)
1960 vmx->nested.vmcs02_initialized = true;
1963 * We don't care what the EPTP value is we just need to guarantee
1964 * it's valid so we don't get a false positive when doing early
1965 * consistency checks.
1967 if (enable_ept && nested_early_check)
1968 vmcs_write64(EPT_POINTER, construct_eptp(&vmx->vcpu, 0));
1970 /* All VMFUNCs are currently emulated through L0 vmexits. */
1971 if (cpu_has_vmx_vmfunc())
1972 vmcs_write64(VM_FUNCTION_CONTROL, 0);
1974 if (cpu_has_vmx_posted_intr())
1975 vmcs_write16(POSTED_INTR_NV, POSTED_INTR_NESTED_VECTOR);
1977 if (cpu_has_vmx_msr_bitmap())
1978 vmcs_write64(MSR_BITMAP, __pa(vmx->nested.vmcs02.msr_bitmap));
1981 * The PML address never changes, so it is constant in vmcs02.
1982 * Conceptually we want to copy the PML index from vmcs01 here,
1983 * and then back to vmcs01 on nested vmexit. But since we flush
1984 * the log and reset GUEST_PML_INDEX on each vmexit, the PML
1985 * index is also effectively constant in vmcs02.
1988 vmcs_write64(PML_ADDRESS, page_to_phys(vmx->pml_pg));
1989 vmcs_write16(GUEST_PML_INDEX, PML_ENTITY_NUM - 1);
1992 if (cpu_has_vmx_encls_vmexit())
1993 vmcs_write64(ENCLS_EXITING_BITMAP, -1ull);
1996 * Set the MSR load/store lists to match L0's settings. Only the
1997 * addresses are constant (for vmcs02), the counts can change based
1998 * on L2's behavior, e.g. switching to/from long mode.
2000 vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
2001 vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host.val));
2002 vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest.val));
2004 vmx_set_constant_host_state(vmx);
2007 static void prepare_vmcs02_early_rare(struct vcpu_vmx *vmx,
2008 struct vmcs12 *vmcs12)
2010 prepare_vmcs02_constant_state(vmx);
2012 vmcs_write64(VMCS_LINK_POINTER, -1ull);
2015 if (nested_cpu_has_vpid(vmcs12) && vmx->nested.vpid02)
2016 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->nested.vpid02);
2018 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
2022 static void prepare_vmcs02_early(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
2024 u32 exec_control, vmcs12_exec_ctrl;
2025 u64 guest_efer = nested_vmx_calc_efer(vmx, vmcs12);
2027 if (vmx->nested.dirty_vmcs12 || vmx->nested.hv_evmcs)
2028 prepare_vmcs02_early_rare(vmx, vmcs12);
2033 exec_control = vmx_pin_based_exec_ctrl(vmx);
2034 exec_control |= (vmcs12->pin_based_vm_exec_control &
2035 ~PIN_BASED_VMX_PREEMPTION_TIMER);
2037 /* Posted interrupts setting is only taken from vmcs12. */
2038 if (nested_cpu_has_posted_intr(vmcs12)) {
2039 vmx->nested.posted_intr_nv = vmcs12->posted_intr_nv;
2040 vmx->nested.pi_pending = false;
2042 exec_control &= ~PIN_BASED_POSTED_INTR;
2044 pin_controls_set(vmx, exec_control);
2049 exec_control = vmx_exec_control(vmx); /* L0's desires */
2050 exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
2051 exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
2052 exec_control &= ~CPU_BASED_TPR_SHADOW;
2053 exec_control |= vmcs12->cpu_based_vm_exec_control;
2055 if (exec_control & CPU_BASED_TPR_SHADOW)
2056 vmcs_write32(TPR_THRESHOLD, vmcs12->tpr_threshold);
2057 #ifdef CONFIG_X86_64
2059 exec_control |= CPU_BASED_CR8_LOAD_EXITING |
2060 CPU_BASED_CR8_STORE_EXITING;
2064 * A vmexit (to either L1 hypervisor or L0 userspace) is always needed
2065 * for I/O port accesses.
2067 exec_control |= CPU_BASED_UNCOND_IO_EXITING;
2068 exec_control &= ~CPU_BASED_USE_IO_BITMAPS;
2071 * This bit will be computed in nested_get_vmcs12_pages, because
2072 * we do not have access to L1's MSR bitmap yet. For now, keep
2073 * the same bit as before, hoping to avoid multiple VMWRITEs that
2074 * only set/clear this bit.
2076 exec_control &= ~CPU_BASED_USE_MSR_BITMAPS;
2077 exec_control |= exec_controls_get(vmx) & CPU_BASED_USE_MSR_BITMAPS;
2079 exec_controls_set(vmx, exec_control);
2082 * SECONDARY EXEC CONTROLS
2084 if (cpu_has_secondary_exec_ctrls()) {
2085 exec_control = vmx->secondary_exec_control;
2087 /* Take the following fields only from vmcs12 */
2088 exec_control &= ~(SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
2089 SECONDARY_EXEC_ENABLE_INVPCID |
2090 SECONDARY_EXEC_RDTSCP |
2091 SECONDARY_EXEC_XSAVES |
2092 SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY |
2093 SECONDARY_EXEC_APIC_REGISTER_VIRT |
2094 SECONDARY_EXEC_ENABLE_VMFUNC);
2095 if (nested_cpu_has(vmcs12,
2096 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)) {
2097 vmcs12_exec_ctrl = vmcs12->secondary_vm_exec_control &
2098 ~SECONDARY_EXEC_ENABLE_PML;
2099 exec_control |= vmcs12_exec_ctrl;
2102 /* VMCS shadowing for L2 is emulated for now */
2103 exec_control &= ~SECONDARY_EXEC_SHADOW_VMCS;
2106 * Preset *DT exiting when emulating UMIP, so that vmx_set_cr4()
2107 * will not have to rewrite the controls just for this bit.
2109 if (!boot_cpu_has(X86_FEATURE_UMIP) && vmx_umip_emulated() &&
2110 (vmcs12->guest_cr4 & X86_CR4_UMIP))
2111 exec_control |= SECONDARY_EXEC_DESC;
2113 if (exec_control & SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY)
2114 vmcs_write16(GUEST_INTR_STATUS,
2115 vmcs12->guest_intr_status);
2117 secondary_exec_controls_set(vmx, exec_control);
2123 * vmcs12's VM_{ENTRY,EXIT}_LOAD_IA32_EFER and VM_ENTRY_IA32E_MODE
2124 * are emulated by vmx_set_efer() in prepare_vmcs02(), but speculate
2125 * on the related bits (if supported by the CPU) in the hope that
2126 * we can avoid VMWrites during vmx_set_efer().
2128 exec_control = (vmcs12->vm_entry_controls | vmx_vmentry_ctrl()) &
2129 ~VM_ENTRY_IA32E_MODE & ~VM_ENTRY_LOAD_IA32_EFER;
2130 if (cpu_has_load_ia32_efer()) {
2131 if (guest_efer & EFER_LMA)
2132 exec_control |= VM_ENTRY_IA32E_MODE;
2133 if (guest_efer != host_efer)
2134 exec_control |= VM_ENTRY_LOAD_IA32_EFER;
2136 vm_entry_controls_set(vmx, exec_control);
2141 * L2->L1 exit controls are emulated - the hardware exit is to L0 so
2142 * we should use its exit controls. Note that VM_EXIT_LOAD_IA32_EFER
2143 * bits may be modified by vmx_set_efer() in prepare_vmcs02().
2145 exec_control = vmx_vmexit_ctrl();
2146 if (cpu_has_load_ia32_efer() && guest_efer != host_efer)
2147 exec_control |= VM_EXIT_LOAD_IA32_EFER;
2148 vm_exit_controls_set(vmx, exec_control);
2151 * Interrupt/Exception Fields
2153 if (vmx->nested.nested_run_pending) {
2154 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2155 vmcs12->vm_entry_intr_info_field);
2156 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE,
2157 vmcs12->vm_entry_exception_error_code);
2158 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
2159 vmcs12->vm_entry_instruction_len);
2160 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
2161 vmcs12->guest_interruptibility_info);
2162 vmx->loaded_vmcs->nmi_known_unmasked =
2163 !(vmcs12->guest_interruptibility_info & GUEST_INTR_STATE_NMI);
2165 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0);
2169 static void prepare_vmcs02_rare(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
2171 struct hv_enlightened_vmcs *hv_evmcs = vmx->nested.hv_evmcs;
2173 if (!hv_evmcs || !(hv_evmcs->hv_clean_fields &
2174 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2)) {
2175 vmcs_write16(GUEST_ES_SELECTOR, vmcs12->guest_es_selector);
2176 vmcs_write16(GUEST_CS_SELECTOR, vmcs12->guest_cs_selector);
2177 vmcs_write16(GUEST_SS_SELECTOR, vmcs12->guest_ss_selector);
2178 vmcs_write16(GUEST_DS_SELECTOR, vmcs12->guest_ds_selector);
2179 vmcs_write16(GUEST_FS_SELECTOR, vmcs12->guest_fs_selector);
2180 vmcs_write16(GUEST_GS_SELECTOR, vmcs12->guest_gs_selector);
2181 vmcs_write16(GUEST_LDTR_SELECTOR, vmcs12->guest_ldtr_selector);
2182 vmcs_write16(GUEST_TR_SELECTOR, vmcs12->guest_tr_selector);
2183 vmcs_write32(GUEST_ES_LIMIT, vmcs12->guest_es_limit);
2184 vmcs_write32(GUEST_CS_LIMIT, vmcs12->guest_cs_limit);
2185 vmcs_write32(GUEST_SS_LIMIT, vmcs12->guest_ss_limit);
2186 vmcs_write32(GUEST_DS_LIMIT, vmcs12->guest_ds_limit);
2187 vmcs_write32(GUEST_FS_LIMIT, vmcs12->guest_fs_limit);
2188 vmcs_write32(GUEST_GS_LIMIT, vmcs12->guest_gs_limit);
2189 vmcs_write32(GUEST_LDTR_LIMIT, vmcs12->guest_ldtr_limit);
2190 vmcs_write32(GUEST_TR_LIMIT, vmcs12->guest_tr_limit);
2191 vmcs_write32(GUEST_GDTR_LIMIT, vmcs12->guest_gdtr_limit);
2192 vmcs_write32(GUEST_IDTR_LIMIT, vmcs12->guest_idtr_limit);
2193 vmcs_write32(GUEST_CS_AR_BYTES, vmcs12->guest_cs_ar_bytes);
2194 vmcs_write32(GUEST_SS_AR_BYTES, vmcs12->guest_ss_ar_bytes);
2195 vmcs_write32(GUEST_ES_AR_BYTES, vmcs12->guest_es_ar_bytes);
2196 vmcs_write32(GUEST_DS_AR_BYTES, vmcs12->guest_ds_ar_bytes);
2197 vmcs_write32(GUEST_FS_AR_BYTES, vmcs12->guest_fs_ar_bytes);
2198 vmcs_write32(GUEST_GS_AR_BYTES, vmcs12->guest_gs_ar_bytes);
2199 vmcs_write32(GUEST_LDTR_AR_BYTES, vmcs12->guest_ldtr_ar_bytes);
2200 vmcs_write32(GUEST_TR_AR_BYTES, vmcs12->guest_tr_ar_bytes);
2201 vmcs_writel(GUEST_ES_BASE, vmcs12->guest_es_base);
2202 vmcs_writel(GUEST_CS_BASE, vmcs12->guest_cs_base);
2203 vmcs_writel(GUEST_SS_BASE, vmcs12->guest_ss_base);
2204 vmcs_writel(GUEST_DS_BASE, vmcs12->guest_ds_base);
2205 vmcs_writel(GUEST_FS_BASE, vmcs12->guest_fs_base);
2206 vmcs_writel(GUEST_GS_BASE, vmcs12->guest_gs_base);
2207 vmcs_writel(GUEST_LDTR_BASE, vmcs12->guest_ldtr_base);
2208 vmcs_writel(GUEST_TR_BASE, vmcs12->guest_tr_base);
2209 vmcs_writel(GUEST_GDTR_BASE, vmcs12->guest_gdtr_base);
2210 vmcs_writel(GUEST_IDTR_BASE, vmcs12->guest_idtr_base);
2213 if (!hv_evmcs || !(hv_evmcs->hv_clean_fields &
2214 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1)) {
2215 vmcs_write32(GUEST_SYSENTER_CS, vmcs12->guest_sysenter_cs);
2216 vmcs_writel(GUEST_PENDING_DBG_EXCEPTIONS,
2217 vmcs12->guest_pending_dbg_exceptions);
2218 vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->guest_sysenter_esp);
2219 vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->guest_sysenter_eip);
2222 * L1 may access the L2's PDPTR, so save them to construct
2226 vmcs_write64(GUEST_PDPTR0, vmcs12->guest_pdptr0);
2227 vmcs_write64(GUEST_PDPTR1, vmcs12->guest_pdptr1);
2228 vmcs_write64(GUEST_PDPTR2, vmcs12->guest_pdptr2);
2229 vmcs_write64(GUEST_PDPTR3, vmcs12->guest_pdptr3);
2232 if (kvm_mpx_supported() && vmx->nested.nested_run_pending &&
2233 (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS))
2234 vmcs_write64(GUEST_BNDCFGS, vmcs12->guest_bndcfgs);
2237 if (nested_cpu_has_xsaves(vmcs12))
2238 vmcs_write64(XSS_EXIT_BITMAP, vmcs12->xss_exit_bitmap);
2241 * Whether page-faults are trapped is determined by a combination of
2242 * 3 settings: PFEC_MASK, PFEC_MATCH and EXCEPTION_BITMAP.PF.
2243 * If enable_ept, L0 doesn't care about page faults and we should
2244 * set all of these to L1's desires. However, if !enable_ept, L0 does
2245 * care about (at least some) page faults, and because it is not easy
2246 * (if at all possible?) to merge L0 and L1's desires, we simply ask
2247 * to exit on each and every L2 page fault. This is done by setting
2248 * MASK=MATCH=0 and (see below) EB.PF=1.
2249 * Note that below we don't need special code to set EB.PF beyond the
2250 * "or"ing of the EB of vmcs01 and vmcs12, because when enable_ept,
2251 * vmcs01's EB.PF is 0 so the "or" will take vmcs12's value, and when
2252 * !enable_ept, EB.PF is 1, so the "or" will always be 1.
2254 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK,
2255 enable_ept ? vmcs12->page_fault_error_code_mask : 0);
2256 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH,
2257 enable_ept ? vmcs12->page_fault_error_code_match : 0);
2259 if (cpu_has_vmx_apicv()) {
2260 vmcs_write64(EOI_EXIT_BITMAP0, vmcs12->eoi_exit_bitmap0);
2261 vmcs_write64(EOI_EXIT_BITMAP1, vmcs12->eoi_exit_bitmap1);
2262 vmcs_write64(EOI_EXIT_BITMAP2, vmcs12->eoi_exit_bitmap2);
2263 vmcs_write64(EOI_EXIT_BITMAP3, vmcs12->eoi_exit_bitmap3);
2266 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, vmx->msr_autoload.host.nr);
2267 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, vmx->msr_autoload.guest.nr);
2269 set_cr4_guest_host_mask(vmx);
2273 * prepare_vmcs02 is called when the L1 guest hypervisor runs its nested
2274 * L2 guest. L1 has a vmcs for L2 (vmcs12), and this function "merges" it
2275 * with L0's requirements for its guest (a.k.a. vmcs01), so we can run the L2
2276 * guest in a way that will both be appropriate to L1's requests, and our
2277 * needs. In addition to modifying the active vmcs (which is vmcs02), this
2278 * function also has additional necessary side-effects, like setting various
2279 * vcpu->arch fields.
2280 * Returns 0 on success, 1 on failure. Invalid state exit qualification code
2281 * is assigned to entry_failure_code on failure.
2283 static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
2284 u32 *entry_failure_code)
2286 struct vcpu_vmx *vmx = to_vmx(vcpu);
2287 struct hv_enlightened_vmcs *hv_evmcs = vmx->nested.hv_evmcs;
2288 bool load_guest_pdptrs_vmcs12 = false;
2290 if (vmx->nested.dirty_vmcs12 || hv_evmcs) {
2291 prepare_vmcs02_rare(vmx, vmcs12);
2292 vmx->nested.dirty_vmcs12 = false;
2294 load_guest_pdptrs_vmcs12 = !hv_evmcs ||
2295 !(hv_evmcs->hv_clean_fields &
2296 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1);
2299 if (vmx->nested.nested_run_pending &&
2300 (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS)) {
2301 kvm_set_dr(vcpu, 7, vmcs12->guest_dr7);
2302 vmcs_write64(GUEST_IA32_DEBUGCTL, vmcs12->guest_ia32_debugctl);
2304 kvm_set_dr(vcpu, 7, vcpu->arch.dr7);
2305 vmcs_write64(GUEST_IA32_DEBUGCTL, vmx->nested.vmcs01_debugctl);
2307 if (kvm_mpx_supported() && (!vmx->nested.nested_run_pending ||
2308 !(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS)))
2309 vmcs_write64(GUEST_BNDCFGS, vmx->nested.vmcs01_guest_bndcfgs);
2310 vmx_set_rflags(vcpu, vmcs12->guest_rflags);
2312 /* EXCEPTION_BITMAP and CR0_GUEST_HOST_MASK should basically be the
2313 * bitwise-or of what L1 wants to trap for L2, and what we want to
2314 * trap. Note that CR0.TS also needs updating - we do this later.
2316 update_exception_bitmap(vcpu);
2317 vcpu->arch.cr0_guest_owned_bits &= ~vmcs12->cr0_guest_host_mask;
2318 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
2320 if (vmx->nested.nested_run_pending &&
2321 (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PAT)) {
2322 vmcs_write64(GUEST_IA32_PAT, vmcs12->guest_ia32_pat);
2323 vcpu->arch.pat = vmcs12->guest_ia32_pat;
2324 } else if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
2325 vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat);
2328 vmcs_write64(TSC_OFFSET, vcpu->arch.tsc_offset);
2330 if (kvm_has_tsc_control)
2331 decache_tsc_multiplier(vmx);
2335 * There is no direct mapping between vpid02 and vpid12, the
2336 * vpid02 is per-vCPU for L0 and reused while the value of
2337 * vpid12 is changed w/ one invvpid during nested vmentry.
2338 * The vpid12 is allocated by L1 for L2, so it will not
2339 * influence global bitmap(for vpid01 and vpid02 allocation)
2340 * even if spawn a lot of nested vCPUs.
2342 if (nested_cpu_has_vpid(vmcs12) && nested_has_guest_tlb_tag(vcpu)) {
2343 if (vmcs12->virtual_processor_id != vmx->nested.last_vpid) {
2344 vmx->nested.last_vpid = vmcs12->virtual_processor_id;
2345 __vmx_flush_tlb(vcpu, nested_get_vpid02(vcpu), false);
2349 * If L1 use EPT, then L0 needs to execute INVEPT on
2350 * EPTP02 instead of EPTP01. Therefore, delay TLB
2351 * flush until vmcs02->eptp is fully updated by
2352 * KVM_REQ_LOAD_CR3. Note that this assumes
2353 * KVM_REQ_TLB_FLUSH is evaluated after
2354 * KVM_REQ_LOAD_CR3 in vcpu_enter_guest().
2356 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
2360 if (nested_cpu_has_ept(vmcs12))
2361 nested_ept_init_mmu_context(vcpu);
2362 else if (nested_cpu_has2(vmcs12,
2363 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
2364 vmx_flush_tlb(vcpu, true);
2367 * This sets GUEST_CR0 to vmcs12->guest_cr0, possibly modifying those
2368 * bits which we consider mandatory enabled.
2369 * The CR0_READ_SHADOW is what L2 should have expected to read given
2370 * the specifications by L1; It's not enough to take
2371 * vmcs12->cr0_read_shadow because on our cr0_guest_host_mask we we
2372 * have more bits than L1 expected.
2374 vmx_set_cr0(vcpu, vmcs12->guest_cr0);
2375 vmcs_writel(CR0_READ_SHADOW, nested_read_cr0(vmcs12));
2377 vmx_set_cr4(vcpu, vmcs12->guest_cr4);
2378 vmcs_writel(CR4_READ_SHADOW, nested_read_cr4(vmcs12));
2380 vcpu->arch.efer = nested_vmx_calc_efer(vmx, vmcs12);
2381 /* Note: may modify VM_ENTRY/EXIT_CONTROLS and GUEST/HOST_IA32_EFER */
2382 vmx_set_efer(vcpu, vcpu->arch.efer);
2385 * Guest state is invalid and unrestricted guest is disabled,
2386 * which means L1 attempted VMEntry to L2 with invalid state.
2389 if (vmx->emulation_required) {
2390 *entry_failure_code = ENTRY_FAIL_DEFAULT;
2394 /* Shadow page tables on either EPT or shadow page tables. */
2395 if (nested_vmx_load_cr3(vcpu, vmcs12->guest_cr3, nested_cpu_has_ept(vmcs12),
2396 entry_failure_code))
2399 /* Late preparation of GUEST_PDPTRs now that EFER and CRs are set. */
2400 if (load_guest_pdptrs_vmcs12 && nested_cpu_has_ept(vmcs12) &&
2401 is_pae_paging(vcpu)) {
2402 vmcs_write64(GUEST_PDPTR0, vmcs12->guest_pdptr0);
2403 vmcs_write64(GUEST_PDPTR1, vmcs12->guest_pdptr1);
2404 vmcs_write64(GUEST_PDPTR2, vmcs12->guest_pdptr2);
2405 vmcs_write64(GUEST_PDPTR3, vmcs12->guest_pdptr3);
2409 vcpu->arch.walk_mmu->inject_page_fault = vmx_inject_page_fault_nested;
2411 kvm_rsp_write(vcpu, vmcs12->guest_rsp);
2412 kvm_rip_write(vcpu, vmcs12->guest_rip);
2416 static int nested_vmx_check_nmi_controls(struct vmcs12 *vmcs12)
2418 if (CC(!nested_cpu_has_nmi_exiting(vmcs12) &&
2419 nested_cpu_has_virtual_nmis(vmcs12)))
2422 if (CC(!nested_cpu_has_virtual_nmis(vmcs12) &&
2423 nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_NMI_PENDING)))
2429 static bool valid_ept_address(struct kvm_vcpu *vcpu, u64 address)
2431 struct vcpu_vmx *vmx = to_vmx(vcpu);
2432 int maxphyaddr = cpuid_maxphyaddr(vcpu);
2434 /* Check for memory type validity */
2435 switch (address & VMX_EPTP_MT_MASK) {
2436 case VMX_EPTP_MT_UC:
2437 if (CC(!(vmx->nested.msrs.ept_caps & VMX_EPTP_UC_BIT)))
2440 case VMX_EPTP_MT_WB:
2441 if (CC(!(vmx->nested.msrs.ept_caps & VMX_EPTP_WB_BIT)))
2448 /* only 4 levels page-walk length are valid */
2449 if (CC((address & VMX_EPTP_PWL_MASK) != VMX_EPTP_PWL_4))
2452 /* Reserved bits should not be set */
2453 if (CC(address >> maxphyaddr || ((address >> 7) & 0x1f)))
2456 /* AD, if set, should be supported */
2457 if (address & VMX_EPTP_AD_ENABLE_BIT) {
2458 if (CC(!(vmx->nested.msrs.ept_caps & VMX_EPT_AD_BIT)))
2466 * Checks related to VM-Execution Control Fields
2468 static int nested_check_vm_execution_controls(struct kvm_vcpu *vcpu,
2469 struct vmcs12 *vmcs12)
2471 struct vcpu_vmx *vmx = to_vmx(vcpu);
2473 if (CC(!vmx_control_verify(vmcs12->pin_based_vm_exec_control,
2474 vmx->nested.msrs.pinbased_ctls_low,
2475 vmx->nested.msrs.pinbased_ctls_high)) ||
2476 CC(!vmx_control_verify(vmcs12->cpu_based_vm_exec_control,
2477 vmx->nested.msrs.procbased_ctls_low,
2478 vmx->nested.msrs.procbased_ctls_high)))
2481 if (nested_cpu_has(vmcs12, CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) &&
2482 CC(!vmx_control_verify(vmcs12->secondary_vm_exec_control,
2483 vmx->nested.msrs.secondary_ctls_low,
2484 vmx->nested.msrs.secondary_ctls_high)))
2487 if (CC(vmcs12->cr3_target_count > nested_cpu_vmx_misc_cr3_count(vcpu)) ||
2488 nested_vmx_check_io_bitmap_controls(vcpu, vmcs12) ||
2489 nested_vmx_check_msr_bitmap_controls(vcpu, vmcs12) ||
2490 nested_vmx_check_tpr_shadow_controls(vcpu, vmcs12) ||
2491 nested_vmx_check_apic_access_controls(vcpu, vmcs12) ||
2492 nested_vmx_check_apicv_controls(vcpu, vmcs12) ||
2493 nested_vmx_check_nmi_controls(vmcs12) ||
2494 nested_vmx_check_pml_controls(vcpu, vmcs12) ||
2495 nested_vmx_check_unrestricted_guest_controls(vcpu, vmcs12) ||
2496 nested_vmx_check_mode_based_ept_exec_controls(vcpu, vmcs12) ||
2497 nested_vmx_check_shadow_vmcs_controls(vcpu, vmcs12) ||
2498 CC(nested_cpu_has_vpid(vmcs12) && !vmcs12->virtual_processor_id))
2501 if (!nested_cpu_has_preemption_timer(vmcs12) &&
2502 nested_cpu_has_save_preemption_timer(vmcs12))
2505 if (nested_cpu_has_ept(vmcs12) &&
2506 CC(!valid_ept_address(vcpu, vmcs12->ept_pointer)))
2509 if (nested_cpu_has_vmfunc(vmcs12)) {
2510 if (CC(vmcs12->vm_function_control &
2511 ~vmx->nested.msrs.vmfunc_controls))
2514 if (nested_cpu_has_eptp_switching(vmcs12)) {
2515 if (CC(!nested_cpu_has_ept(vmcs12)) ||
2516 CC(!page_address_valid(vcpu, vmcs12->eptp_list_address)))
2525 * Checks related to VM-Exit Control Fields
2527 static int nested_check_vm_exit_controls(struct kvm_vcpu *vcpu,
2528 struct vmcs12 *vmcs12)
2530 struct vcpu_vmx *vmx = to_vmx(vcpu);
2532 if (CC(!vmx_control_verify(vmcs12->vm_exit_controls,
2533 vmx->nested.msrs.exit_ctls_low,
2534 vmx->nested.msrs.exit_ctls_high)) ||
2535 CC(nested_vmx_check_exit_msr_switch_controls(vcpu, vmcs12)))
2542 * Checks related to VM-Entry Control Fields
2544 static int nested_check_vm_entry_controls(struct kvm_vcpu *vcpu,
2545 struct vmcs12 *vmcs12)
2547 struct vcpu_vmx *vmx = to_vmx(vcpu);
2549 if (CC(!vmx_control_verify(vmcs12->vm_entry_controls,
2550 vmx->nested.msrs.entry_ctls_low,
2551 vmx->nested.msrs.entry_ctls_high)))
2555 * From the Intel SDM, volume 3:
2556 * Fields relevant to VM-entry event injection must be set properly.
2557 * These fields are the VM-entry interruption-information field, the
2558 * VM-entry exception error code, and the VM-entry instruction length.
2560 if (vmcs12->vm_entry_intr_info_field & INTR_INFO_VALID_MASK) {
2561 u32 intr_info = vmcs12->vm_entry_intr_info_field;
2562 u8 vector = intr_info & INTR_INFO_VECTOR_MASK;
2563 u32 intr_type = intr_info & INTR_INFO_INTR_TYPE_MASK;
2564 bool has_error_code = intr_info & INTR_INFO_DELIVER_CODE_MASK;
2565 bool should_have_error_code;
2566 bool urg = nested_cpu_has2(vmcs12,
2567 SECONDARY_EXEC_UNRESTRICTED_GUEST);
2568 bool prot_mode = !urg || vmcs12->guest_cr0 & X86_CR0_PE;
2570 /* VM-entry interruption-info field: interruption type */
2571 if (CC(intr_type == INTR_TYPE_RESERVED) ||
2572 CC(intr_type == INTR_TYPE_OTHER_EVENT &&
2573 !nested_cpu_supports_monitor_trap_flag(vcpu)))
2576 /* VM-entry interruption-info field: vector */
2577 if (CC(intr_type == INTR_TYPE_NMI_INTR && vector != NMI_VECTOR) ||
2578 CC(intr_type == INTR_TYPE_HARD_EXCEPTION && vector > 31) ||
2579 CC(intr_type == INTR_TYPE_OTHER_EVENT && vector != 0))
2582 /* VM-entry interruption-info field: deliver error code */
2583 should_have_error_code =
2584 intr_type == INTR_TYPE_HARD_EXCEPTION && prot_mode &&
2585 x86_exception_has_error_code(vector);
2586 if (CC(has_error_code != should_have_error_code))
2589 /* VM-entry exception error code */
2590 if (CC(has_error_code &&
2591 vmcs12->vm_entry_exception_error_code & GENMASK(31, 15)))
2594 /* VM-entry interruption-info field: reserved bits */
2595 if (CC(intr_info & INTR_INFO_RESVD_BITS_MASK))
2598 /* VM-entry instruction length */
2599 switch (intr_type) {
2600 case INTR_TYPE_SOFT_EXCEPTION:
2601 case INTR_TYPE_SOFT_INTR:
2602 case INTR_TYPE_PRIV_SW_EXCEPTION:
2603 if (CC(vmcs12->vm_entry_instruction_len > 15) ||
2604 CC(vmcs12->vm_entry_instruction_len == 0 &&
2605 CC(!nested_cpu_has_zero_length_injection(vcpu))))
2610 if (nested_vmx_check_entry_msr_switch_controls(vcpu, vmcs12))
2616 static int nested_vmx_check_controls(struct kvm_vcpu *vcpu,
2617 struct vmcs12 *vmcs12)
2619 if (nested_check_vm_execution_controls(vcpu, vmcs12) ||
2620 nested_check_vm_exit_controls(vcpu, vmcs12) ||
2621 nested_check_vm_entry_controls(vcpu, vmcs12))
2627 static int nested_vmx_check_host_state(struct kvm_vcpu *vcpu,
2628 struct vmcs12 *vmcs12)
2632 if (CC(!nested_host_cr0_valid(vcpu, vmcs12->host_cr0)) ||
2633 CC(!nested_host_cr4_valid(vcpu, vmcs12->host_cr4)) ||
2634 CC(!nested_cr3_valid(vcpu, vmcs12->host_cr3)))
2637 if (CC(is_noncanonical_address(vmcs12->host_ia32_sysenter_esp, vcpu)) ||
2638 CC(is_noncanonical_address(vmcs12->host_ia32_sysenter_eip, vcpu)))
2641 if ((vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PAT) &&
2642 CC(!kvm_pat_valid(vmcs12->host_ia32_pat)))
2645 ia32e = (vmcs12->vm_exit_controls &
2646 VM_EXIT_HOST_ADDR_SPACE_SIZE) != 0;
2648 if (CC(vmcs12->host_cs_selector & (SEGMENT_RPL_MASK | SEGMENT_TI_MASK)) ||
2649 CC(vmcs12->host_ss_selector & (SEGMENT_RPL_MASK | SEGMENT_TI_MASK)) ||
2650 CC(vmcs12->host_ds_selector & (SEGMENT_RPL_MASK | SEGMENT_TI_MASK)) ||
2651 CC(vmcs12->host_es_selector & (SEGMENT_RPL_MASK | SEGMENT_TI_MASK)) ||
2652 CC(vmcs12->host_fs_selector & (SEGMENT_RPL_MASK | SEGMENT_TI_MASK)) ||
2653 CC(vmcs12->host_gs_selector & (SEGMENT_RPL_MASK | SEGMENT_TI_MASK)) ||
2654 CC(vmcs12->host_tr_selector & (SEGMENT_RPL_MASK | SEGMENT_TI_MASK)) ||
2655 CC(vmcs12->host_cs_selector == 0) ||
2656 CC(vmcs12->host_tr_selector == 0) ||
2657 CC(vmcs12->host_ss_selector == 0 && !ia32e))
2660 #ifdef CONFIG_X86_64
2661 if (CC(is_noncanonical_address(vmcs12->host_fs_base, vcpu)) ||
2662 CC(is_noncanonical_address(vmcs12->host_gs_base, vcpu)) ||
2663 CC(is_noncanonical_address(vmcs12->host_gdtr_base, vcpu)) ||
2664 CC(is_noncanonical_address(vmcs12->host_idtr_base, vcpu)) ||
2665 CC(is_noncanonical_address(vmcs12->host_tr_base, vcpu)))
2670 * If the load IA32_EFER VM-exit control is 1, bits reserved in the
2671 * IA32_EFER MSR must be 0 in the field for that register. In addition,
2672 * the values of the LMA and LME bits in the field must each be that of
2673 * the host address-space size VM-exit control.
2675 if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER) {
2676 if (CC(!kvm_valid_efer(vcpu, vmcs12->host_ia32_efer)) ||
2677 CC(ia32e != !!(vmcs12->host_ia32_efer & EFER_LMA)) ||
2678 CC(ia32e != !!(vmcs12->host_ia32_efer & EFER_LME)))
2685 static int nested_vmx_check_vmcs_link_ptr(struct kvm_vcpu *vcpu,
2686 struct vmcs12 *vmcs12)
2689 struct vmcs12 *shadow;
2690 struct kvm_host_map map;
2692 if (vmcs12->vmcs_link_pointer == -1ull)
2695 if (CC(!page_address_valid(vcpu, vmcs12->vmcs_link_pointer)))
2698 if (CC(kvm_vcpu_map(vcpu, gpa_to_gfn(vmcs12->vmcs_link_pointer), &map)))
2703 if (CC(shadow->hdr.revision_id != VMCS12_REVISION) ||
2704 CC(shadow->hdr.shadow_vmcs != nested_cpu_has_shadow_vmcs(vmcs12)))
2707 kvm_vcpu_unmap(vcpu, &map, false);
2712 * Checks related to Guest Non-register State
2714 static int nested_check_guest_non_reg_state(struct vmcs12 *vmcs12)
2716 if (CC(vmcs12->guest_activity_state != GUEST_ACTIVITY_ACTIVE &&
2717 vmcs12->guest_activity_state != GUEST_ACTIVITY_HLT))
2723 static int nested_vmx_check_guest_state(struct kvm_vcpu *vcpu,
2724 struct vmcs12 *vmcs12,
2729 *exit_qual = ENTRY_FAIL_DEFAULT;
2731 if (CC(!nested_guest_cr0_valid(vcpu, vmcs12->guest_cr0)) ||
2732 CC(!nested_guest_cr4_valid(vcpu, vmcs12->guest_cr4)))
2735 if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PAT) &&
2736 CC(!kvm_pat_valid(vmcs12->guest_ia32_pat)))
2739 if (nested_vmx_check_vmcs_link_ptr(vcpu, vmcs12)) {
2740 *exit_qual = ENTRY_FAIL_VMCS_LINK_PTR;
2745 * If the load IA32_EFER VM-entry control is 1, the following checks
2746 * are performed on the field for the IA32_EFER MSR:
2747 * - Bits reserved in the IA32_EFER MSR must be 0.
2748 * - Bit 10 (corresponding to IA32_EFER.LMA) must equal the value of
2749 * the IA-32e mode guest VM-exit control. It must also be identical
2750 * to bit 8 (LME) if bit 31 in the CR0 field (corresponding to
2753 if (to_vmx(vcpu)->nested.nested_run_pending &&
2754 (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_EFER)) {
2755 ia32e = (vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE) != 0;
2756 if (CC(!kvm_valid_efer(vcpu, vmcs12->guest_ia32_efer)) ||
2757 CC(ia32e != !!(vmcs12->guest_ia32_efer & EFER_LMA)) ||
2758 CC(((vmcs12->guest_cr0 & X86_CR0_PG) &&
2759 ia32e != !!(vmcs12->guest_ia32_efer & EFER_LME))))
2763 if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS) &&
2764 (CC(is_noncanonical_address(vmcs12->guest_bndcfgs & PAGE_MASK, vcpu)) ||
2765 CC((vmcs12->guest_bndcfgs & MSR_IA32_BNDCFGS_RSVD))))
2768 if (nested_check_guest_non_reg_state(vmcs12))
2774 static int nested_vmx_check_vmentry_hw(struct kvm_vcpu *vcpu)
2776 struct vcpu_vmx *vmx = to_vmx(vcpu);
2777 unsigned long cr3, cr4;
2780 if (!nested_early_check)
2783 if (vmx->msr_autoload.host.nr)
2784 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
2785 if (vmx->msr_autoload.guest.nr)
2786 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
2790 vmx_prepare_switch_to_guest(vcpu);
2793 * Induce a consistency check VMExit by clearing bit 1 in GUEST_RFLAGS,
2794 * which is reserved to '1' by hardware. GUEST_RFLAGS is guaranteed to
2795 * be written (by preparve_vmcs02()) before the "real" VMEnter, i.e.
2796 * there is no need to preserve other bits or save/restore the field.
2798 vmcs_writel(GUEST_RFLAGS, 0);
2800 cr3 = __get_current_cr3_fast();
2801 if (unlikely(cr3 != vmx->loaded_vmcs->host_state.cr3)) {
2802 vmcs_writel(HOST_CR3, cr3);
2803 vmx->loaded_vmcs->host_state.cr3 = cr3;
2806 cr4 = cr4_read_shadow();
2807 if (unlikely(cr4 != vmx->loaded_vmcs->host_state.cr4)) {
2808 vmcs_writel(HOST_CR4, cr4);
2809 vmx->loaded_vmcs->host_state.cr4 = cr4;
2813 "sub $%c[wordsize], %%" _ASM_SP "\n\t" /* temporarily adjust RSP for CALL */
2814 "cmp %%" _ASM_SP ", %c[host_state_rsp](%[loaded_vmcs]) \n\t"
2816 __ex("vmwrite %%" _ASM_SP ", %[HOST_RSP]") "\n\t"
2817 "mov %%" _ASM_SP ", %c[host_state_rsp](%[loaded_vmcs]) \n\t"
2819 "add $%c[wordsize], %%" _ASM_SP "\n\t" /* un-adjust RSP */
2821 /* Check if vmlaunch or vmresume is needed */
2822 "cmpb $0, %c[launched](%[loaded_vmcs])\n\t"
2825 * VMLAUNCH and VMRESUME clear RFLAGS.{CF,ZF} on VM-Exit, set
2826 * RFLAGS.CF on VM-Fail Invalid and set RFLAGS.ZF on VM-Fail
2827 * Valid. vmx_vmenter() directly "returns" RFLAGS, and so the
2828 * results of VM-Enter is captured via CC_{SET,OUT} to vm_fail.
2830 "call vmx_vmenter\n\t"
2833 : ASM_CALL_CONSTRAINT, CC_OUT(be) (vm_fail)
2834 : [HOST_RSP]"r"((unsigned long)HOST_RSP),
2835 [loaded_vmcs]"r"(vmx->loaded_vmcs),
2836 [launched]"i"(offsetof(struct loaded_vmcs, launched)),
2837 [host_state_rsp]"i"(offsetof(struct loaded_vmcs, host_state.rsp)),
2838 [wordsize]"i"(sizeof(ulong))
2842 if (vmx->msr_autoload.host.nr)
2843 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, vmx->msr_autoload.host.nr);
2844 if (vmx->msr_autoload.guest.nr)
2845 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, vmx->msr_autoload.guest.nr);
2848 u32 error = vmcs_read32(VM_INSTRUCTION_ERROR);
2852 trace_kvm_nested_vmenter_failed(
2853 "early hardware check VM-instruction error: ", error);
2854 WARN_ON_ONCE(error != VMXERR_ENTRY_INVALID_CONTROL_FIELD);
2859 * VMExit clears RFLAGS.IF and DR7, even on a consistency check.
2862 if (hw_breakpoint_active())
2863 set_debugreg(__this_cpu_read(cpu_dr7), 7);
2867 * A non-failing VMEntry means we somehow entered guest mode with
2868 * an illegal RIP, and that's just the tip of the iceberg. There
2869 * is no telling what memory has been modified or what state has
2870 * been exposed to unknown code. Hitting this all but guarantees
2871 * a (very critical) hardware issue.
2873 WARN_ON(!(vmcs_read32(VM_EXIT_REASON) &
2874 VMX_EXIT_REASONS_FAILED_VMENTRY));
2879 static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu,
2880 struct vmcs12 *vmcs12);
2882 static void nested_get_vmcs12_pages(struct kvm_vcpu *vcpu)
2884 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
2885 struct vcpu_vmx *vmx = to_vmx(vcpu);
2886 struct kvm_host_map *map;
2890 if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) {
2892 * Translate L1 physical address to host physical
2893 * address for vmcs02. Keep the page pinned, so this
2894 * physical address remains valid. We keep a reference
2895 * to it so we can release it later.
2897 if (vmx->nested.apic_access_page) { /* shouldn't happen */
2898 kvm_release_page_dirty(vmx->nested.apic_access_page);
2899 vmx->nested.apic_access_page = NULL;
2901 page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->apic_access_addr);
2903 * If translation failed, no matter: This feature asks
2904 * to exit when accessing the given address, and if it
2905 * can never be accessed, this feature won't do
2908 if (!is_error_page(page)) {
2909 vmx->nested.apic_access_page = page;
2910 hpa = page_to_phys(vmx->nested.apic_access_page);
2911 vmcs_write64(APIC_ACCESS_ADDR, hpa);
2913 secondary_exec_controls_clearbit(vmx,
2914 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES);
2918 if (nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) {
2919 map = &vmx->nested.virtual_apic_map;
2921 if (!kvm_vcpu_map(vcpu, gpa_to_gfn(vmcs12->virtual_apic_page_addr), map)) {
2922 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, pfn_to_hpa(map->pfn));
2923 } else if (nested_cpu_has(vmcs12, CPU_BASED_CR8_LOAD_EXITING) &&
2924 nested_cpu_has(vmcs12, CPU_BASED_CR8_STORE_EXITING) &&
2925 !nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) {
2927 * The processor will never use the TPR shadow, simply
2928 * clear the bit from the execution control. Such a
2929 * configuration is useless, but it happens in tests.
2930 * For any other configuration, failing the vm entry is
2931 * _not_ what the processor does but it's basically the
2932 * only possibility we have.
2934 exec_controls_clearbit(vmx, CPU_BASED_TPR_SHADOW);
2937 * Write an illegal value to VIRTUAL_APIC_PAGE_ADDR to
2938 * force VM-Entry to fail.
2940 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, -1ull);
2944 if (nested_cpu_has_posted_intr(vmcs12)) {
2945 map = &vmx->nested.pi_desc_map;
2947 if (!kvm_vcpu_map(vcpu, gpa_to_gfn(vmcs12->posted_intr_desc_addr), map)) {
2948 vmx->nested.pi_desc =
2949 (struct pi_desc *)(((void *)map->hva) +
2950 offset_in_page(vmcs12->posted_intr_desc_addr));
2951 vmcs_write64(POSTED_INTR_DESC_ADDR,
2952 pfn_to_hpa(map->pfn) + offset_in_page(vmcs12->posted_intr_desc_addr));
2955 if (nested_vmx_prepare_msr_bitmap(vcpu, vmcs12))
2956 exec_controls_setbit(vmx, CPU_BASED_USE_MSR_BITMAPS);
2958 exec_controls_clearbit(vmx, CPU_BASED_USE_MSR_BITMAPS);
2962 * Intel's VMX Instruction Reference specifies a common set of prerequisites
2963 * for running VMX instructions (except VMXON, whose prerequisites are
2964 * slightly different). It also specifies what exception to inject otherwise.
2965 * Note that many of these exceptions have priority over VM exits, so they
2966 * don't have to be checked again here.
2968 static int nested_vmx_check_permission(struct kvm_vcpu *vcpu)
2970 if (!to_vmx(vcpu)->nested.vmxon) {
2971 kvm_queue_exception(vcpu, UD_VECTOR);
2975 if (vmx_get_cpl(vcpu)) {
2976 kvm_inject_gp(vcpu, 0);
2983 static u8 vmx_has_apicv_interrupt(struct kvm_vcpu *vcpu)
2985 u8 rvi = vmx_get_rvi();
2986 u8 vppr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_PROCPRI);
2988 return ((rvi & 0xf0) > (vppr & 0xf0));
2991 static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
2992 struct vmcs12 *vmcs12);
2995 * If from_vmentry is false, this is being called from state restore (either RSM
2996 * or KVM_SET_NESTED_STATE). Otherwise it's called from vmlaunch/vmresume.
2999 + * 0 - success, i.e. proceed with actual VMEnter
3000 + * 1 - consistency check VMExit
3001 + * -1 - consistency check VMFail
3003 int nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu, bool from_vmentry)
3005 struct vcpu_vmx *vmx = to_vmx(vcpu);
3006 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
3007 bool evaluate_pending_interrupts;
3008 u32 exit_reason = EXIT_REASON_INVALID_STATE;
3011 evaluate_pending_interrupts = exec_controls_get(vmx) &
3012 (CPU_BASED_VIRTUAL_INTR_PENDING | CPU_BASED_VIRTUAL_NMI_PENDING);
3013 if (likely(!evaluate_pending_interrupts) && kvm_vcpu_apicv_active(vcpu))
3014 evaluate_pending_interrupts |= vmx_has_apicv_interrupt(vcpu);
3016 if (!(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS))
3017 vmx->nested.vmcs01_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL);
3018 if (kvm_mpx_supported() &&
3019 !(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS))
3020 vmx->nested.vmcs01_guest_bndcfgs = vmcs_read64(GUEST_BNDCFGS);
3023 * Overwrite vmcs01.GUEST_CR3 with L1's CR3 if EPT is disabled *and*
3024 * nested early checks are disabled. In the event of a "late" VM-Fail,
3025 * i.e. a VM-Fail detected by hardware but not KVM, KVM must unwind its
3026 * software model to the pre-VMEntry host state. When EPT is disabled,
3027 * GUEST_CR3 holds KVM's shadow CR3, not L1's "real" CR3, which causes
3028 * nested_vmx_restore_host_state() to corrupt vcpu->arch.cr3. Stuffing
3029 * vmcs01.GUEST_CR3 results in the unwind naturally setting arch.cr3 to
3030 * the correct value. Smashing vmcs01.GUEST_CR3 is safe because nested
3031 * VM-Exits, and the unwind, reset KVM's MMU, i.e. vmcs01.GUEST_CR3 is
3032 * guaranteed to be overwritten with a shadow CR3 prior to re-entering
3033 * L1. Don't stuff vmcs01.GUEST_CR3 when using nested early checks as
3034 * KVM modifies vcpu->arch.cr3 if and only if the early hardware checks
3035 * pass, and early VM-Fails do not reset KVM's MMU, i.e. the VM-Fail
3036 * path would need to manually save/restore vmcs01.GUEST_CR3.
3038 if (!enable_ept && !nested_early_check)
3039 vmcs_writel(GUEST_CR3, vcpu->arch.cr3);
3041 vmx_switch_vmcs(vcpu, &vmx->nested.vmcs02);
3043 prepare_vmcs02_early(vmx, vmcs12);
3046 nested_get_vmcs12_pages(vcpu);
3048 if (nested_vmx_check_vmentry_hw(vcpu)) {
3049 vmx_switch_vmcs(vcpu, &vmx->vmcs01);
3053 if (nested_vmx_check_guest_state(vcpu, vmcs12, &exit_qual))
3054 goto vmentry_fail_vmexit;
3057 enter_guest_mode(vcpu);
3058 if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
3059 vcpu->arch.tsc_offset += vmcs12->tsc_offset;
3061 if (prepare_vmcs02(vcpu, vmcs12, &exit_qual))
3062 goto vmentry_fail_vmexit_guest_mode;
3065 exit_reason = EXIT_REASON_MSR_LOAD_FAIL;
3066 exit_qual = nested_vmx_load_msr(vcpu,
3067 vmcs12->vm_entry_msr_load_addr,
3068 vmcs12->vm_entry_msr_load_count);
3070 goto vmentry_fail_vmexit_guest_mode;
3073 * The MMU is not initialized to point at the right entities yet and
3074 * "get pages" would need to read data from the guest (i.e. we will
3075 * need to perform gpa to hpa translation). Request a call
3076 * to nested_get_vmcs12_pages before the next VM-entry. The MSRs
3077 * have already been set at vmentry time and should not be reset.
3079 kvm_make_request(KVM_REQ_GET_VMCS12_PAGES, vcpu);
3083 * If L1 had a pending IRQ/NMI until it executed
3084 * VMLAUNCH/VMRESUME which wasn't delivered because it was
3085 * disallowed (e.g. interrupts disabled), L0 needs to
3086 * evaluate if this pending event should cause an exit from L2
3087 * to L1 or delivered directly to L2 (e.g. In case L1 don't
3088 * intercept EXTERNAL_INTERRUPT).
3090 * Usually this would be handled by the processor noticing an
3091 * IRQ/NMI window request, or checking RVI during evaluation of
3092 * pending virtual interrupts. However, this setting was done
3093 * on VMCS01 and now VMCS02 is active instead. Thus, we force L0
3094 * to perform pending event evaluation by requesting a KVM_REQ_EVENT.
3096 if (unlikely(evaluate_pending_interrupts))
3097 kvm_make_request(KVM_REQ_EVENT, vcpu);
3100 * Do not start the preemption timer hrtimer until after we know
3101 * we are successful, so that only nested_vmx_vmexit needs to cancel
3104 vmx->nested.preemption_timer_expired = false;
3105 if (nested_cpu_has_preemption_timer(vmcs12))
3106 vmx_start_preemption_timer(vcpu);
3109 * Note no nested_vmx_succeed or nested_vmx_fail here. At this point
3110 * we are no longer running L1, and VMLAUNCH/VMRESUME has not yet
3111 * returned as far as L1 is concerned. It will only return (and set
3112 * the success flag) when L2 exits (see nested_vmx_vmexit()).
3117 * A failed consistency check that leads to a VMExit during L1's
3118 * VMEnter to L2 is a variation of a normal VMexit, as explained in
3119 * 26.7 "VM-entry failures during or after loading guest state".
3121 vmentry_fail_vmexit_guest_mode:
3122 if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
3123 vcpu->arch.tsc_offset -= vmcs12->tsc_offset;
3124 leave_guest_mode(vcpu);
3126 vmentry_fail_vmexit:
3127 vmx_switch_vmcs(vcpu, &vmx->vmcs01);
3132 load_vmcs12_host_state(vcpu, vmcs12);
3133 vmcs12->vm_exit_reason = exit_reason | VMX_EXIT_REASONS_FAILED_VMENTRY;
3134 vmcs12->exit_qualification = exit_qual;
3135 if (enable_shadow_vmcs || vmx->nested.hv_evmcs)
3136 vmx->nested.need_vmcs12_to_shadow_sync = true;
3141 * nested_vmx_run() handles a nested entry, i.e., a VMLAUNCH or VMRESUME on L1
3142 * for running an L2 nested guest.
3144 static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
3146 struct vmcs12 *vmcs12;
3147 struct vcpu_vmx *vmx = to_vmx(vcpu);
3148 u32 interrupt_shadow = vmx_get_interrupt_shadow(vcpu);
3151 if (!nested_vmx_check_permission(vcpu))
3154 if (!nested_vmx_handle_enlightened_vmptrld(vcpu, launch))
3157 if (!vmx->nested.hv_evmcs && vmx->nested.current_vmptr == -1ull)
3158 return nested_vmx_failInvalid(vcpu);
3160 vmcs12 = get_vmcs12(vcpu);
3163 * Can't VMLAUNCH or VMRESUME a shadow VMCS. Despite the fact
3164 * that there *is* a valid VMCS pointer, RFLAGS.CF is set
3165 * rather than RFLAGS.ZF, and no error number is stored to the
3166 * VM-instruction error field.
3168 if (vmcs12->hdr.shadow_vmcs)
3169 return nested_vmx_failInvalid(vcpu);
3171 if (vmx->nested.hv_evmcs) {
3172 copy_enlightened_to_vmcs12(vmx);
3173 /* Enlightened VMCS doesn't have launch state */
3174 vmcs12->launch_state = !launch;
3175 } else if (enable_shadow_vmcs) {
3176 copy_shadow_to_vmcs12(vmx);
3180 * The nested entry process starts with enforcing various prerequisites
3181 * on vmcs12 as required by the Intel SDM, and act appropriately when
3182 * they fail: As the SDM explains, some conditions should cause the
3183 * instruction to fail, while others will cause the instruction to seem
3184 * to succeed, but return an EXIT_REASON_INVALID_STATE.
3185 * To speed up the normal (success) code path, we should avoid checking
3186 * for misconfigurations which will anyway be caught by the processor
3187 * when using the merged vmcs02.
3189 if (interrupt_shadow & KVM_X86_SHADOW_INT_MOV_SS)
3190 return nested_vmx_failValid(vcpu,
3191 VMXERR_ENTRY_EVENTS_BLOCKED_BY_MOV_SS);
3193 if (vmcs12->launch_state == launch)
3194 return nested_vmx_failValid(vcpu,
3195 launch ? VMXERR_VMLAUNCH_NONCLEAR_VMCS
3196 : VMXERR_VMRESUME_NONLAUNCHED_VMCS);
3198 if (nested_vmx_check_controls(vcpu, vmcs12))
3199 return nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD);
3201 if (nested_vmx_check_host_state(vcpu, vmcs12))
3202 return nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_HOST_STATE_FIELD);
3205 * We're finally done with prerequisite checking, and can start with
3208 vmx->nested.nested_run_pending = 1;
3209 ret = nested_vmx_enter_non_root_mode(vcpu, true);
3210 vmx->nested.nested_run_pending = !ret;
3214 return nested_vmx_failValid(vcpu,
3215 VMXERR_ENTRY_INVALID_CONTROL_FIELD);
3217 /* Hide L1D cache contents from the nested guest. */
3218 vmx->vcpu.arch.l1tf_flush_l1d = true;
3221 * Must happen outside of nested_vmx_enter_non_root_mode() as it will
3222 * also be used as part of restoring nVMX state for
3223 * snapshot restore (migration).
3225 * In this flow, it is assumed that vmcs12 cache was
3226 * trasferred as part of captured nVMX state and should
3227 * therefore not be read from guest memory (which may not
3228 * exist on destination host yet).
3230 nested_cache_shadow_vmcs12(vcpu, vmcs12);
3233 * If we're entering a halted L2 vcpu and the L2 vcpu won't be
3234 * awakened by event injection or by an NMI-window VM-exit or
3235 * by an interrupt-window VM-exit, halt the vcpu.
3237 if ((vmcs12->guest_activity_state == GUEST_ACTIVITY_HLT) &&
3238 !(vmcs12->vm_entry_intr_info_field & INTR_INFO_VALID_MASK) &&
3239 !(vmcs12->cpu_based_vm_exec_control & CPU_BASED_VIRTUAL_NMI_PENDING) &&
3240 !((vmcs12->cpu_based_vm_exec_control & CPU_BASED_VIRTUAL_INTR_PENDING) &&
3241 (vmcs12->guest_rflags & X86_EFLAGS_IF))) {
3242 vmx->nested.nested_run_pending = 0;
3243 return kvm_vcpu_halt(vcpu);
3249 * On a nested exit from L2 to L1, vmcs12.guest_cr0 might not be up-to-date
3250 * because L2 may have changed some cr0 bits directly (CRO_GUEST_HOST_MASK).
3251 * This function returns the new value we should put in vmcs12.guest_cr0.
3252 * It's not enough to just return the vmcs02 GUEST_CR0. Rather,
3253 * 1. Bits that neither L0 nor L1 trapped, were set directly by L2 and are now
3254 * available in vmcs02 GUEST_CR0. (Note: It's enough to check that L0
3255 * didn't trap the bit, because if L1 did, so would L0).
3256 * 2. Bits that L1 asked to trap (and therefore L0 also did) could not have
3257 * been modified by L2, and L1 knows it. So just leave the old value of
3258 * the bit from vmcs12.guest_cr0. Note that the bit from vmcs02 GUEST_CR0
3259 * isn't relevant, because if L0 traps this bit it can set it to anything.
3260 * 3. Bits that L1 didn't trap, but L0 did. L1 believes the guest could have
3261 * changed these bits, and therefore they need to be updated, but L0
3262 * didn't necessarily allow them to be changed in GUEST_CR0 - and rather
3263 * put them in vmcs02 CR0_READ_SHADOW. So take these bits from there.
3265 static inline unsigned long
3266 vmcs12_guest_cr0(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
3269 /*1*/ (vmcs_readl(GUEST_CR0) & vcpu->arch.cr0_guest_owned_bits) |
3270 /*2*/ (vmcs12->guest_cr0 & vmcs12->cr0_guest_host_mask) |
3271 /*3*/ (vmcs_readl(CR0_READ_SHADOW) & ~(vmcs12->cr0_guest_host_mask |
3272 vcpu->arch.cr0_guest_owned_bits));
3275 static inline unsigned long
3276 vmcs12_guest_cr4(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
3279 /*1*/ (vmcs_readl(GUEST_CR4) & vcpu->arch.cr4_guest_owned_bits) |
3280 /*2*/ (vmcs12->guest_cr4 & vmcs12->cr4_guest_host_mask) |
3281 /*3*/ (vmcs_readl(CR4_READ_SHADOW) & ~(vmcs12->cr4_guest_host_mask |
3282 vcpu->arch.cr4_guest_owned_bits));
3285 static void vmcs12_save_pending_event(struct kvm_vcpu *vcpu,
3286 struct vmcs12 *vmcs12)
3291 if (vcpu->arch.exception.injected) {
3292 nr = vcpu->arch.exception.nr;
3293 idt_vectoring = nr | VECTORING_INFO_VALID_MASK;
3295 if (kvm_exception_is_soft(nr)) {
3296 vmcs12->vm_exit_instruction_len =
3297 vcpu->arch.event_exit_inst_len;
3298 idt_vectoring |= INTR_TYPE_SOFT_EXCEPTION;
3300 idt_vectoring |= INTR_TYPE_HARD_EXCEPTION;
3302 if (vcpu->arch.exception.has_error_code) {
3303 idt_vectoring |= VECTORING_INFO_DELIVER_CODE_MASK;
3304 vmcs12->idt_vectoring_error_code =
3305 vcpu->arch.exception.error_code;
3308 vmcs12->idt_vectoring_info_field = idt_vectoring;
3309 } else if (vcpu->arch.nmi_injected) {
3310 vmcs12->idt_vectoring_info_field =
3311 INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR;
3312 } else if (vcpu->arch.interrupt.injected) {
3313 nr = vcpu->arch.interrupt.nr;
3314 idt_vectoring = nr | VECTORING_INFO_VALID_MASK;
3316 if (vcpu->arch.interrupt.soft) {
3317 idt_vectoring |= INTR_TYPE_SOFT_INTR;
3318 vmcs12->vm_entry_instruction_len =
3319 vcpu->arch.event_exit_inst_len;
3321 idt_vectoring |= INTR_TYPE_EXT_INTR;
3323 vmcs12->idt_vectoring_info_field = idt_vectoring;
3328 static void nested_mark_vmcs12_pages_dirty(struct kvm_vcpu *vcpu)
3330 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
3334 * Don't need to mark the APIC access page dirty; it is never
3335 * written to by the CPU during APIC virtualization.
3338 if (nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) {
3339 gfn = vmcs12->virtual_apic_page_addr >> PAGE_SHIFT;
3340 kvm_vcpu_mark_page_dirty(vcpu, gfn);
3343 if (nested_cpu_has_posted_intr(vmcs12)) {
3344 gfn = vmcs12->posted_intr_desc_addr >> PAGE_SHIFT;
3345 kvm_vcpu_mark_page_dirty(vcpu, gfn);
3349 static void vmx_complete_nested_posted_interrupt(struct kvm_vcpu *vcpu)
3351 struct vcpu_vmx *vmx = to_vmx(vcpu);
3356 if (!vmx->nested.pi_desc || !vmx->nested.pi_pending)
3359 vmx->nested.pi_pending = false;
3360 if (!pi_test_and_clear_on(vmx->nested.pi_desc))
3363 max_irr = find_last_bit((unsigned long *)vmx->nested.pi_desc->pir, 256);
3364 if (max_irr != 256) {
3365 vapic_page = vmx->nested.virtual_apic_map.hva;
3369 __kvm_apic_update_irr(vmx->nested.pi_desc->pir,
3370 vapic_page, &max_irr);
3371 status = vmcs_read16(GUEST_INTR_STATUS);
3372 if ((u8)max_irr > ((u8)status & 0xff)) {
3374 status |= (u8)max_irr;
3375 vmcs_write16(GUEST_INTR_STATUS, status);
3379 nested_mark_vmcs12_pages_dirty(vcpu);
3382 static void nested_vmx_inject_exception_vmexit(struct kvm_vcpu *vcpu,
3383 unsigned long exit_qual)
3385 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
3386 unsigned int nr = vcpu->arch.exception.nr;
3387 u32 intr_info = nr | INTR_INFO_VALID_MASK;
3389 if (vcpu->arch.exception.has_error_code) {
3390 vmcs12->vm_exit_intr_error_code = vcpu->arch.exception.error_code;
3391 intr_info |= INTR_INFO_DELIVER_CODE_MASK;
3394 if (kvm_exception_is_soft(nr))
3395 intr_info |= INTR_TYPE_SOFT_EXCEPTION;
3397 intr_info |= INTR_TYPE_HARD_EXCEPTION;
3399 if (!(vmcs12->idt_vectoring_info_field & VECTORING_INFO_VALID_MASK) &&
3400 vmx_get_nmi_mask(vcpu))
3401 intr_info |= INTR_INFO_UNBLOCK_NMI;
3403 nested_vmx_vmexit(vcpu, EXIT_REASON_EXCEPTION_NMI, intr_info, exit_qual);
3406 static int vmx_check_nested_events(struct kvm_vcpu *vcpu, bool external_intr)
3408 struct vcpu_vmx *vmx = to_vmx(vcpu);
3409 unsigned long exit_qual;
3410 bool block_nested_events =
3411 vmx->nested.nested_run_pending || kvm_event_needs_reinjection(vcpu);
3412 struct kvm_lapic *apic = vcpu->arch.apic;
3414 if (lapic_in_kernel(vcpu) &&
3415 test_bit(KVM_APIC_INIT, &apic->pending_events)) {
3416 if (block_nested_events)
3418 nested_vmx_vmexit(vcpu, EXIT_REASON_INIT_SIGNAL, 0, 0);
3422 if (vcpu->arch.exception.pending &&
3423 nested_vmx_check_exception(vcpu, &exit_qual)) {
3424 if (block_nested_events)
3426 nested_vmx_inject_exception_vmexit(vcpu, exit_qual);
3430 if (nested_cpu_has_preemption_timer(get_vmcs12(vcpu)) &&
3431 vmx->nested.preemption_timer_expired) {
3432 if (block_nested_events)
3434 nested_vmx_vmexit(vcpu, EXIT_REASON_PREEMPTION_TIMER, 0, 0);
3438 if (vcpu->arch.nmi_pending && nested_exit_on_nmi(vcpu)) {
3439 if (block_nested_events)
3441 nested_vmx_vmexit(vcpu, EXIT_REASON_EXCEPTION_NMI,
3442 NMI_VECTOR | INTR_TYPE_NMI_INTR |
3443 INTR_INFO_VALID_MASK, 0);
3445 * The NMI-triggered VM exit counts as injection:
3446 * clear this one and block further NMIs.
3448 vcpu->arch.nmi_pending = 0;
3449 vmx_set_nmi_mask(vcpu, true);
3453 if ((kvm_cpu_has_interrupt(vcpu) || external_intr) &&
3454 nested_exit_on_intr(vcpu)) {
3455 if (block_nested_events)
3457 nested_vmx_vmexit(vcpu, EXIT_REASON_EXTERNAL_INTERRUPT, 0, 0);
3461 vmx_complete_nested_posted_interrupt(vcpu);
3465 static u32 vmx_get_preemption_timer_value(struct kvm_vcpu *vcpu)
3468 hrtimer_get_remaining(&to_vmx(vcpu)->nested.preemption_timer);
3471 if (ktime_to_ns(remaining) <= 0)
3474 value = ktime_to_ns(remaining) * vcpu->arch.virtual_tsc_khz;
3475 do_div(value, 1000000);
3476 return value >> VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE;
3479 static bool is_vmcs12_ext_field(unsigned long field)
3482 case GUEST_ES_SELECTOR:
3483 case GUEST_CS_SELECTOR:
3484 case GUEST_SS_SELECTOR:
3485 case GUEST_DS_SELECTOR:
3486 case GUEST_FS_SELECTOR:
3487 case GUEST_GS_SELECTOR:
3488 case GUEST_LDTR_SELECTOR:
3489 case GUEST_TR_SELECTOR:
3490 case GUEST_ES_LIMIT:
3491 case GUEST_CS_LIMIT:
3492 case GUEST_SS_LIMIT:
3493 case GUEST_DS_LIMIT:
3494 case GUEST_FS_LIMIT:
3495 case GUEST_GS_LIMIT:
3496 case GUEST_LDTR_LIMIT:
3497 case GUEST_TR_LIMIT:
3498 case GUEST_GDTR_LIMIT:
3499 case GUEST_IDTR_LIMIT:
3500 case GUEST_ES_AR_BYTES:
3501 case GUEST_DS_AR_BYTES:
3502 case GUEST_FS_AR_BYTES:
3503 case GUEST_GS_AR_BYTES:
3504 case GUEST_LDTR_AR_BYTES:
3505 case GUEST_TR_AR_BYTES:
3512 case GUEST_LDTR_BASE:
3514 case GUEST_GDTR_BASE:
3515 case GUEST_IDTR_BASE:
3516 case GUEST_PENDING_DBG_EXCEPTIONS:
3526 static void sync_vmcs02_to_vmcs12_rare(struct kvm_vcpu *vcpu,
3527 struct vmcs12 *vmcs12)
3529 struct vcpu_vmx *vmx = to_vmx(vcpu);
3531 vmcs12->guest_es_selector = vmcs_read16(GUEST_ES_SELECTOR);
3532 vmcs12->guest_cs_selector = vmcs_read16(GUEST_CS_SELECTOR);
3533 vmcs12->guest_ss_selector = vmcs_read16(GUEST_SS_SELECTOR);
3534 vmcs12->guest_ds_selector = vmcs_read16(GUEST_DS_SELECTOR);
3535 vmcs12->guest_fs_selector = vmcs_read16(GUEST_FS_SELECTOR);
3536 vmcs12->guest_gs_selector = vmcs_read16(GUEST_GS_SELECTOR);
3537 vmcs12->guest_ldtr_selector = vmcs_read16(GUEST_LDTR_SELECTOR);
3538 vmcs12->guest_tr_selector = vmcs_read16(GUEST_TR_SELECTOR);
3539 vmcs12->guest_es_limit = vmcs_read32(GUEST_ES_LIMIT);
3540 vmcs12->guest_cs_limit = vmcs_read32(GUEST_CS_LIMIT);
3541 vmcs12->guest_ss_limit = vmcs_read32(GUEST_SS_LIMIT);
3542 vmcs12->guest_ds_limit = vmcs_read32(GUEST_DS_LIMIT);
3543 vmcs12->guest_fs_limit = vmcs_read32(GUEST_FS_LIMIT);
3544 vmcs12->guest_gs_limit = vmcs_read32(GUEST_GS_LIMIT);
3545 vmcs12->guest_ldtr_limit = vmcs_read32(GUEST_LDTR_LIMIT);
3546 vmcs12->guest_tr_limit = vmcs_read32(GUEST_TR_LIMIT);
3547 vmcs12->guest_gdtr_limit = vmcs_read32(GUEST_GDTR_LIMIT);
3548 vmcs12->guest_idtr_limit = vmcs_read32(GUEST_IDTR_LIMIT);
3549 vmcs12->guest_es_ar_bytes = vmcs_read32(GUEST_ES_AR_BYTES);
3550 vmcs12->guest_ds_ar_bytes = vmcs_read32(GUEST_DS_AR_BYTES);
3551 vmcs12->guest_fs_ar_bytes = vmcs_read32(GUEST_FS_AR_BYTES);
3552 vmcs12->guest_gs_ar_bytes = vmcs_read32(GUEST_GS_AR_BYTES);
3553 vmcs12->guest_ldtr_ar_bytes = vmcs_read32(GUEST_LDTR_AR_BYTES);
3554 vmcs12->guest_tr_ar_bytes = vmcs_read32(GUEST_TR_AR_BYTES);
3555 vmcs12->guest_es_base = vmcs_readl(GUEST_ES_BASE);
3556 vmcs12->guest_cs_base = vmcs_readl(GUEST_CS_BASE);
3557 vmcs12->guest_ss_base = vmcs_readl(GUEST_SS_BASE);
3558 vmcs12->guest_ds_base = vmcs_readl(GUEST_DS_BASE);
3559 vmcs12->guest_fs_base = vmcs_readl(GUEST_FS_BASE);
3560 vmcs12->guest_gs_base = vmcs_readl(GUEST_GS_BASE);
3561 vmcs12->guest_ldtr_base = vmcs_readl(GUEST_LDTR_BASE);
3562 vmcs12->guest_tr_base = vmcs_readl(GUEST_TR_BASE);
3563 vmcs12->guest_gdtr_base = vmcs_readl(GUEST_GDTR_BASE);
3564 vmcs12->guest_idtr_base = vmcs_readl(GUEST_IDTR_BASE);
3565 vmcs12->guest_pending_dbg_exceptions =
3566 vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS);
3567 if (kvm_mpx_supported())
3568 vmcs12->guest_bndcfgs = vmcs_read64(GUEST_BNDCFGS);
3570 vmx->nested.need_sync_vmcs02_to_vmcs12_rare = false;
3573 static void copy_vmcs02_to_vmcs12_rare(struct kvm_vcpu *vcpu,
3574 struct vmcs12 *vmcs12)
3576 struct vcpu_vmx *vmx = to_vmx(vcpu);
3579 if (!vmx->nested.need_sync_vmcs02_to_vmcs12_rare)
3583 WARN_ON_ONCE(vmx->loaded_vmcs != &vmx->vmcs01);
3586 vmx->loaded_vmcs = &vmx->nested.vmcs02;
3587 vmx_vcpu_load(&vmx->vcpu, cpu);
3589 sync_vmcs02_to_vmcs12_rare(vcpu, vmcs12);
3591 vmx->loaded_vmcs = &vmx->vmcs01;
3592 vmx_vcpu_load(&vmx->vcpu, cpu);
3597 * Update the guest state fields of vmcs12 to reflect changes that
3598 * occurred while L2 was running. (The "IA-32e mode guest" bit of the
3599 * VM-entry controls is also updated, since this is really a guest
3602 static void sync_vmcs02_to_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
3604 struct vcpu_vmx *vmx = to_vmx(vcpu);
3606 if (vmx->nested.hv_evmcs)
3607 sync_vmcs02_to_vmcs12_rare(vcpu, vmcs12);
3609 vmx->nested.need_sync_vmcs02_to_vmcs12_rare = !vmx->nested.hv_evmcs;
3611 vmcs12->guest_cr0 = vmcs12_guest_cr0(vcpu, vmcs12);
3612 vmcs12->guest_cr4 = vmcs12_guest_cr4(vcpu, vmcs12);
3614 vmcs12->guest_rsp = kvm_rsp_read(vcpu);
3615 vmcs12->guest_rip = kvm_rip_read(vcpu);
3616 vmcs12->guest_rflags = vmcs_readl(GUEST_RFLAGS);
3618 vmcs12->guest_cs_ar_bytes = vmcs_read32(GUEST_CS_AR_BYTES);
3619 vmcs12->guest_ss_ar_bytes = vmcs_read32(GUEST_SS_AR_BYTES);
3621 vmcs12->guest_sysenter_cs = vmcs_read32(GUEST_SYSENTER_CS);
3622 vmcs12->guest_sysenter_esp = vmcs_readl(GUEST_SYSENTER_ESP);
3623 vmcs12->guest_sysenter_eip = vmcs_readl(GUEST_SYSENTER_EIP);
3625 vmcs12->guest_interruptibility_info =
3626 vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
3628 if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
3629 vmcs12->guest_activity_state = GUEST_ACTIVITY_HLT;
3631 vmcs12->guest_activity_state = GUEST_ACTIVITY_ACTIVE;
3633 if (nested_cpu_has_preemption_timer(vmcs12) &&
3634 vmcs12->vm_exit_controls & VM_EXIT_SAVE_VMX_PREEMPTION_TIMER)
3635 vmcs12->vmx_preemption_timer_value =
3636 vmx_get_preemption_timer_value(vcpu);
3639 * In some cases (usually, nested EPT), L2 is allowed to change its
3640 * own CR3 without exiting. If it has changed it, we must keep it.
3641 * Of course, if L0 is using shadow page tables, GUEST_CR3 was defined
3642 * by L0, not L1 or L2, so we mustn't unconditionally copy it to vmcs12.
3644 * Additionally, restore L2's PDPTR to vmcs12.
3647 vmcs12->guest_cr3 = vmcs_readl(GUEST_CR3);
3648 if (nested_cpu_has_ept(vmcs12) && is_pae_paging(vcpu)) {
3649 vmcs12->guest_pdptr0 = vmcs_read64(GUEST_PDPTR0);
3650 vmcs12->guest_pdptr1 = vmcs_read64(GUEST_PDPTR1);
3651 vmcs12->guest_pdptr2 = vmcs_read64(GUEST_PDPTR2);
3652 vmcs12->guest_pdptr3 = vmcs_read64(GUEST_PDPTR3);
3656 vmcs12->guest_linear_address = vmcs_readl(GUEST_LINEAR_ADDRESS);
3658 if (nested_cpu_has_vid(vmcs12))
3659 vmcs12->guest_intr_status = vmcs_read16(GUEST_INTR_STATUS);
3661 vmcs12->vm_entry_controls =
3662 (vmcs12->vm_entry_controls & ~VM_ENTRY_IA32E_MODE) |
3663 (vm_entry_controls_get(to_vmx(vcpu)) & VM_ENTRY_IA32E_MODE);
3665 if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_DEBUG_CONTROLS)
3666 kvm_get_dr(vcpu, 7, (unsigned long *)&vmcs12->guest_dr7);
3668 if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_IA32_EFER)
3669 vmcs12->guest_ia32_efer = vcpu->arch.efer;
3673 * prepare_vmcs12 is part of what we need to do when the nested L2 guest exits
3674 * and we want to prepare to run its L1 parent. L1 keeps a vmcs for L2 (vmcs12),
3675 * and this function updates it to reflect the changes to the guest state while
3676 * L2 was running (and perhaps made some exits which were handled directly by L0
3677 * without going back to L1), and to reflect the exit reason.
3678 * Note that we do not have to copy here all VMCS fields, just those that
3679 * could have changed by the L2 guest or the exit - i.e., the guest-state and
3680 * exit-information fields only. Other fields are modified by L1 with VMWRITE,
3681 * which already writes to vmcs12 directly.
3683 static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
3684 u32 exit_reason, u32 exit_intr_info,
3685 unsigned long exit_qualification)
3687 /* update exit information fields: */
3688 vmcs12->vm_exit_reason = exit_reason;
3689 vmcs12->exit_qualification = exit_qualification;
3690 vmcs12->vm_exit_intr_info = exit_intr_info;
3692 vmcs12->idt_vectoring_info_field = 0;
3693 vmcs12->vm_exit_instruction_len = vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
3694 vmcs12->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
3696 if (!(vmcs12->vm_exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY)) {
3697 vmcs12->launch_state = 1;
3699 /* vm_entry_intr_info_field is cleared on exit. Emulate this
3700 * instead of reading the real value. */
3701 vmcs12->vm_entry_intr_info_field &= ~INTR_INFO_VALID_MASK;
3704 * Transfer the event that L0 or L1 may wanted to inject into
3705 * L2 to IDT_VECTORING_INFO_FIELD.
3707 vmcs12_save_pending_event(vcpu, vmcs12);
3710 * According to spec, there's no need to store the guest's
3711 * MSRs if the exit is due to a VM-entry failure that occurs
3712 * during or after loading the guest state. Since this exit
3713 * does not fall in that category, we need to save the MSRs.
3715 if (nested_vmx_store_msr(vcpu,
3716 vmcs12->vm_exit_msr_store_addr,
3717 vmcs12->vm_exit_msr_store_count))
3718 nested_vmx_abort(vcpu,
3719 VMX_ABORT_SAVE_GUEST_MSR_FAIL);
3723 * Drop what we picked up for L2 via vmx_complete_interrupts. It is
3724 * preserved above and would only end up incorrectly in L1.
3726 vcpu->arch.nmi_injected = false;
3727 kvm_clear_exception_queue(vcpu);
3728 kvm_clear_interrupt_queue(vcpu);
3732 * A part of what we need to when the nested L2 guest exits and we want to
3733 * run its L1 parent, is to reset L1's guest state to the host state specified
3735 * This function is to be called not only on normal nested exit, but also on
3736 * a nested entry failure, as explained in Intel's spec, 3B.23.7 ("VM-Entry
3737 * Failures During or After Loading Guest State").
3738 * This function should be called when the active VMCS is L1's (vmcs01).
3740 static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
3741 struct vmcs12 *vmcs12)
3743 struct kvm_segment seg;
3744 u32 entry_failure_code;
3746 if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER)
3747 vcpu->arch.efer = vmcs12->host_ia32_efer;
3748 else if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE)
3749 vcpu->arch.efer |= (EFER_LMA | EFER_LME);
3751 vcpu->arch.efer &= ~(EFER_LMA | EFER_LME);
3752 vmx_set_efer(vcpu, vcpu->arch.efer);
3754 kvm_rsp_write(vcpu, vmcs12->host_rsp);
3755 kvm_rip_write(vcpu, vmcs12->host_rip);
3756 vmx_set_rflags(vcpu, X86_EFLAGS_FIXED);
3757 vmx_set_interrupt_shadow(vcpu, 0);
3760 * Note that calling vmx_set_cr0 is important, even if cr0 hasn't
3761 * actually changed, because vmx_set_cr0 refers to efer set above.
3763 * CR0_GUEST_HOST_MASK is already set in the original vmcs01
3764 * (KVM doesn't change it);
3766 vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS;
3767 vmx_set_cr0(vcpu, vmcs12->host_cr0);
3769 /* Same as above - no reason to call set_cr4_guest_host_mask(). */
3770 vcpu->arch.cr4_guest_owned_bits = ~vmcs_readl(CR4_GUEST_HOST_MASK);
3771 vmx_set_cr4(vcpu, vmcs12->host_cr4);
3773 nested_ept_uninit_mmu_context(vcpu);
3776 * Only PDPTE load can fail as the value of cr3 was checked on entry and
3777 * couldn't have changed.
3779 if (nested_vmx_load_cr3(vcpu, vmcs12->host_cr3, false, &entry_failure_code))
3780 nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_PDPTE_FAIL);
3783 vcpu->arch.walk_mmu->inject_page_fault = kvm_inject_page_fault;
3786 * If vmcs01 doesn't use VPID, CPU flushes TLB on every
3787 * VMEntry/VMExit. Thus, no need to flush TLB.
3789 * If vmcs12 doesn't use VPID, L1 expects TLB to be
3790 * flushed on every VMEntry/VMExit.
3792 * Otherwise, we can preserve TLB entries as long as we are
3793 * able to tag L1 TLB entries differently than L2 TLB entries.
3795 * If vmcs12 uses EPT, we need to execute this flush on EPTP01
3796 * and therefore we request the TLB flush to happen only after VMCS EPTP
3797 * has been set by KVM_REQ_LOAD_CR3.
3800 (!nested_cpu_has_vpid(vmcs12) || !nested_has_guest_tlb_tag(vcpu))) {
3801 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
3804 vmcs_write32(GUEST_SYSENTER_CS, vmcs12->host_ia32_sysenter_cs);
3805 vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->host_ia32_sysenter_esp);
3806 vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->host_ia32_sysenter_eip);
3807 vmcs_writel(GUEST_IDTR_BASE, vmcs12->host_idtr_base);
3808 vmcs_writel(GUEST_GDTR_BASE, vmcs12->host_gdtr_base);
3809 vmcs_write32(GUEST_IDTR_LIMIT, 0xFFFF);
3810 vmcs_write32(GUEST_GDTR_LIMIT, 0xFFFF);
3812 /* If not VM_EXIT_CLEAR_BNDCFGS, the L2 value propagates to L1. */
3813 if (vmcs12->vm_exit_controls & VM_EXIT_CLEAR_BNDCFGS)
3814 vmcs_write64(GUEST_BNDCFGS, 0);
3816 if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PAT) {
3817 vmcs_write64(GUEST_IA32_PAT, vmcs12->host_ia32_pat);
3818 vcpu->arch.pat = vmcs12->host_ia32_pat;
3820 if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL)
3821 vmcs_write64(GUEST_IA32_PERF_GLOBAL_CTRL,
3822 vmcs12->host_ia32_perf_global_ctrl);
3824 /* Set L1 segment info according to Intel SDM
3825 27.5.2 Loading Host Segment and Descriptor-Table Registers */
3826 seg = (struct kvm_segment) {
3828 .limit = 0xFFFFFFFF,
3829 .selector = vmcs12->host_cs_selector,
3835 if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE)
3839 vmx_set_segment(vcpu, &seg, VCPU_SREG_CS);
3840 seg = (struct kvm_segment) {
3842 .limit = 0xFFFFFFFF,
3849 seg.selector = vmcs12->host_ds_selector;
3850 vmx_set_segment(vcpu, &seg, VCPU_SREG_DS);
3851 seg.selector = vmcs12->host_es_selector;
3852 vmx_set_segment(vcpu, &seg, VCPU_SREG_ES);
3853 seg.selector = vmcs12->host_ss_selector;
3854 vmx_set_segment(vcpu, &seg, VCPU_SREG_SS);
3855 seg.selector = vmcs12->host_fs_selector;
3856 seg.base = vmcs12->host_fs_base;
3857 vmx_set_segment(vcpu, &seg, VCPU_SREG_FS);
3858 seg.selector = vmcs12->host_gs_selector;
3859 seg.base = vmcs12->host_gs_base;
3860 vmx_set_segment(vcpu, &seg, VCPU_SREG_GS);
3861 seg = (struct kvm_segment) {
3862 .base = vmcs12->host_tr_base,
3864 .selector = vmcs12->host_tr_selector,
3868 vmx_set_segment(vcpu, &seg, VCPU_SREG_TR);
3870 kvm_set_dr(vcpu, 7, 0x400);
3871 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
3873 if (cpu_has_vmx_msr_bitmap())
3874 vmx_update_msr_bitmap(vcpu);
3876 if (nested_vmx_load_msr(vcpu, vmcs12->vm_exit_msr_load_addr,
3877 vmcs12->vm_exit_msr_load_count))
3878 nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_MSR_FAIL);
3881 static inline u64 nested_vmx_get_vmcs01_guest_efer(struct vcpu_vmx *vmx)
3883 struct shared_msr_entry *efer_msr;
3886 if (vm_entry_controls_get(vmx) & VM_ENTRY_LOAD_IA32_EFER)
3887 return vmcs_read64(GUEST_IA32_EFER);
3889 if (cpu_has_load_ia32_efer())
3892 for (i = 0; i < vmx->msr_autoload.guest.nr; ++i) {
3893 if (vmx->msr_autoload.guest.val[i].index == MSR_EFER)
3894 return vmx->msr_autoload.guest.val[i].value;
3897 efer_msr = find_msr_entry(vmx, MSR_EFER);
3899 return efer_msr->data;
3904 static void nested_vmx_restore_host_state(struct kvm_vcpu *vcpu)
3906 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
3907 struct vcpu_vmx *vmx = to_vmx(vcpu);
3908 struct vmx_msr_entry g, h;
3912 vcpu->arch.pat = vmcs_read64(GUEST_IA32_PAT);
3914 if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS) {
3916 * L1's host DR7 is lost if KVM_GUESTDBG_USE_HW_BP is set
3917 * as vmcs01.GUEST_DR7 contains a userspace defined value
3918 * and vcpu->arch.dr7 is not squirreled away before the
3919 * nested VMENTER (not worth adding a variable in nested_vmx).
3921 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
3922 kvm_set_dr(vcpu, 7, DR7_FIXED_1);
3924 WARN_ON(kvm_set_dr(vcpu, 7, vmcs_readl(GUEST_DR7)));
3928 * Note that calling vmx_set_{efer,cr0,cr4} is important as they
3929 * handle a variety of side effects to KVM's software model.
3931 vmx_set_efer(vcpu, nested_vmx_get_vmcs01_guest_efer(vmx));
3933 vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS;
3934 vmx_set_cr0(vcpu, vmcs_readl(CR0_READ_SHADOW));
3936 vcpu->arch.cr4_guest_owned_bits = ~vmcs_readl(CR4_GUEST_HOST_MASK);
3937 vmx_set_cr4(vcpu, vmcs_readl(CR4_READ_SHADOW));
3939 nested_ept_uninit_mmu_context(vcpu);
3940 vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
3941 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
3944 * Use ept_save_pdptrs(vcpu) to load the MMU's cached PDPTRs
3945 * from vmcs01 (if necessary). The PDPTRs are not loaded on
3946 * VMFail, like everything else we just need to ensure our
3947 * software model is up-to-date.
3950 ept_save_pdptrs(vcpu);
3952 kvm_mmu_reset_context(vcpu);
3954 if (cpu_has_vmx_msr_bitmap())
3955 vmx_update_msr_bitmap(vcpu);
3958 * This nasty bit of open coding is a compromise between blindly
3959 * loading L1's MSRs using the exit load lists (incorrect emulation
3960 * of VMFail), leaving the nested VM's MSRs in the software model
3961 * (incorrect behavior) and snapshotting the modified MSRs (too
3962 * expensive since the lists are unbound by hardware). For each
3963 * MSR that was (prematurely) loaded from the nested VMEntry load
3964 * list, reload it from the exit load list if it exists and differs
3965 * from the guest value. The intent is to stuff host state as
3966 * silently as possible, not to fully process the exit load list.
3968 for (i = 0; i < vmcs12->vm_entry_msr_load_count; i++) {
3969 gpa = vmcs12->vm_entry_msr_load_addr + (i * sizeof(g));
3970 if (kvm_vcpu_read_guest(vcpu, gpa, &g, sizeof(g))) {
3971 pr_debug_ratelimited(
3972 "%s read MSR index failed (%u, 0x%08llx)\n",
3977 for (j = 0; j < vmcs12->vm_exit_msr_load_count; j++) {
3978 gpa = vmcs12->vm_exit_msr_load_addr + (j * sizeof(h));
3979 if (kvm_vcpu_read_guest(vcpu, gpa, &h, sizeof(h))) {
3980 pr_debug_ratelimited(
3981 "%s read MSR failed (%u, 0x%08llx)\n",
3985 if (h.index != g.index)
3987 if (h.value == g.value)
3990 if (nested_vmx_load_msr_check(vcpu, &h)) {
3991 pr_debug_ratelimited(
3992 "%s check failed (%u, 0x%x, 0x%x)\n",
3993 __func__, j, h.index, h.reserved);
3997 if (kvm_set_msr(vcpu, h.index, h.value)) {
3998 pr_debug_ratelimited(
3999 "%s WRMSR failed (%u, 0x%x, 0x%llx)\n",
4000 __func__, j, h.index, h.value);
4009 nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_MSR_FAIL);
4013 * Emulate an exit from nested guest (L2) to L1, i.e., prepare to run L1
4014 * and modify vmcs12 to make it see what it would expect to see there if
4015 * L2 was its real guest. Must only be called when in L2 (is_guest_mode())
4017 void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason,
4018 u32 exit_intr_info, unsigned long exit_qualification)
4020 struct vcpu_vmx *vmx = to_vmx(vcpu);
4021 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
4023 /* trying to cancel vmlaunch/vmresume is a bug */
4024 WARN_ON_ONCE(vmx->nested.nested_run_pending);
4026 leave_guest_mode(vcpu);
4028 if (nested_cpu_has_preemption_timer(vmcs12))
4029 hrtimer_cancel(&to_vmx(vcpu)->nested.preemption_timer);
4031 if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
4032 vcpu->arch.tsc_offset -= vmcs12->tsc_offset;
4034 if (likely(!vmx->fail)) {
4035 sync_vmcs02_to_vmcs12(vcpu, vmcs12);
4037 if (exit_reason != -1)
4038 prepare_vmcs12(vcpu, vmcs12, exit_reason, exit_intr_info,
4039 exit_qualification);
4042 * Must happen outside of sync_vmcs02_to_vmcs12() as it will
4043 * also be used to capture vmcs12 cache as part of
4044 * capturing nVMX state for snapshot (migration).
4046 * Otherwise, this flush will dirty guest memory at a
4047 * point it is already assumed by user-space to be
4050 nested_flush_cached_shadow_vmcs12(vcpu, vmcs12);
4053 * The only expected VM-instruction error is "VM entry with
4054 * invalid control field(s)." Anything else indicates a
4055 * problem with L0. And we should never get here with a
4056 * VMFail of any type if early consistency checks are enabled.
4058 WARN_ON_ONCE(vmcs_read32(VM_INSTRUCTION_ERROR) !=
4059 VMXERR_ENTRY_INVALID_CONTROL_FIELD);
4060 WARN_ON_ONCE(nested_early_check);
4063 vmx_switch_vmcs(vcpu, &vmx->vmcs01);
4065 /* Update any VMCS fields that might have changed while L2 ran */
4066 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, vmx->msr_autoload.host.nr);
4067 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, vmx->msr_autoload.guest.nr);
4068 vmcs_write64(TSC_OFFSET, vcpu->arch.tsc_offset);
4070 if (kvm_has_tsc_control)
4071 decache_tsc_multiplier(vmx);
4073 if (vmx->nested.change_vmcs01_virtual_apic_mode) {
4074 vmx->nested.change_vmcs01_virtual_apic_mode = false;
4075 vmx_set_virtual_apic_mode(vcpu);
4076 } else if (!nested_cpu_has_ept(vmcs12) &&
4077 nested_cpu_has2(vmcs12,
4078 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) {
4079 vmx_flush_tlb(vcpu, true);
4082 /* Unpin physical memory we referred to in vmcs02 */
4083 if (vmx->nested.apic_access_page) {
4084 kvm_release_page_dirty(vmx->nested.apic_access_page);
4085 vmx->nested.apic_access_page = NULL;
4087 kvm_vcpu_unmap(vcpu, &vmx->nested.virtual_apic_map, true);
4088 kvm_vcpu_unmap(vcpu, &vmx->nested.pi_desc_map, true);
4089 vmx->nested.pi_desc = NULL;
4092 * We are now running in L2, mmu_notifier will force to reload the
4093 * page's hpa for L2 vmcs. Need to reload it for L1 before entering L1.
4095 kvm_make_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu);
4097 if ((exit_reason != -1) && (enable_shadow_vmcs || vmx->nested.hv_evmcs))
4098 vmx->nested.need_vmcs12_to_shadow_sync = true;
4100 /* in case we halted in L2 */
4101 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
4103 if (likely(!vmx->fail)) {
4105 * TODO: SDM says that with acknowledge interrupt on
4106 * exit, bit 31 of the VM-exit interrupt information
4107 * (valid interrupt) is always set to 1 on
4108 * EXIT_REASON_EXTERNAL_INTERRUPT, so we shouldn't
4109 * need kvm_cpu_has_interrupt(). See the commit
4110 * message for details.
4112 if (nested_exit_intr_ack_set(vcpu) &&
4113 exit_reason == EXIT_REASON_EXTERNAL_INTERRUPT &&
4114 kvm_cpu_has_interrupt(vcpu)) {
4115 int irq = kvm_cpu_get_interrupt(vcpu);
4117 vmcs12->vm_exit_intr_info = irq |
4118 INTR_INFO_VALID_MASK | INTR_TYPE_EXT_INTR;
4121 if (exit_reason != -1)
4122 trace_kvm_nested_vmexit_inject(vmcs12->vm_exit_reason,
4123 vmcs12->exit_qualification,
4124 vmcs12->idt_vectoring_info_field,
4125 vmcs12->vm_exit_intr_info,
4126 vmcs12->vm_exit_intr_error_code,
4129 load_vmcs12_host_state(vcpu, vmcs12);
4135 * After an early L2 VM-entry failure, we're now back
4136 * in L1 which thinks it just finished a VMLAUNCH or
4137 * VMRESUME instruction, so we need to set the failure
4138 * flag and the VM-instruction error field of the VMCS
4139 * accordingly, and skip the emulated instruction.
4141 (void)nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD);
4144 * Restore L1's host state to KVM's software model. We're here
4145 * because a consistency check was caught by hardware, which
4146 * means some amount of guest state has been propagated to KVM's
4147 * model and needs to be unwound to the host's state.
4149 nested_vmx_restore_host_state(vcpu);
4155 * Decode the memory-address operand of a vmx instruction, as recorded on an
4156 * exit caused by such an instruction (run by a guest hypervisor).
4157 * On success, returns 0. When the operand is invalid, returns 1 and throws
4160 int get_vmx_mem_address(struct kvm_vcpu *vcpu, unsigned long exit_qualification,
4161 u32 vmx_instruction_info, bool wr, int len, gva_t *ret)
4165 struct kvm_segment s;
4168 * According to Vol. 3B, "Information for VM Exits Due to Instruction
4169 * Execution", on an exit, vmx_instruction_info holds most of the
4170 * addressing components of the operand. Only the displacement part
4171 * is put in exit_qualification (see 3B, "Basic VM-Exit Information").
4172 * For how an actual address is calculated from all these components,
4173 * refer to Vol. 1, "Operand Addressing".
4175 int scaling = vmx_instruction_info & 3;
4176 int addr_size = (vmx_instruction_info >> 7) & 7;
4177 bool is_reg = vmx_instruction_info & (1u << 10);
4178 int seg_reg = (vmx_instruction_info >> 15) & 7;
4179 int index_reg = (vmx_instruction_info >> 18) & 0xf;
4180 bool index_is_valid = !(vmx_instruction_info & (1u << 22));
4181 int base_reg = (vmx_instruction_info >> 23) & 0xf;
4182 bool base_is_valid = !(vmx_instruction_info & (1u << 27));
4185 kvm_queue_exception(vcpu, UD_VECTOR);
4189 /* Addr = segment_base + offset */
4190 /* offset = base + [index * scale] + displacement */
4191 off = exit_qualification; /* holds the displacement */
4193 off = (gva_t)sign_extend64(off, 31);
4194 else if (addr_size == 0)
4195 off = (gva_t)sign_extend64(off, 15);
4197 off += kvm_register_read(vcpu, base_reg);
4199 off += kvm_register_read(vcpu, index_reg)<<scaling;
4200 vmx_get_segment(vcpu, &s, seg_reg);
4203 * The effective address, i.e. @off, of a memory operand is truncated
4204 * based on the address size of the instruction. Note that this is
4205 * the *effective address*, i.e. the address prior to accounting for
4206 * the segment's base.
4208 if (addr_size == 1) /* 32 bit */
4210 else if (addr_size == 0) /* 16 bit */
4213 /* Checks for #GP/#SS exceptions. */
4215 if (is_long_mode(vcpu)) {
4217 * The virtual/linear address is never truncated in 64-bit
4218 * mode, e.g. a 32-bit address size can yield a 64-bit virtual
4219 * address when using FS/GS with a non-zero base.
4221 if (seg_reg == VCPU_SREG_FS || seg_reg == VCPU_SREG_GS)
4222 *ret = s.base + off;
4226 /* Long mode: #GP(0)/#SS(0) if the memory address is in a
4227 * non-canonical form. This is the only check on the memory
4228 * destination for long mode!
4230 exn = is_noncanonical_address(*ret, vcpu);
4233 * When not in long mode, the virtual/linear address is
4234 * unconditionally truncated to 32 bits regardless of the
4237 *ret = (s.base + off) & 0xffffffff;
4239 /* Protected mode: apply checks for segment validity in the
4241 * - segment type check (#GP(0) may be thrown)
4242 * - usability check (#GP(0)/#SS(0))
4243 * - limit check (#GP(0)/#SS(0))
4246 /* #GP(0) if the destination operand is located in a
4247 * read-only data segment or any code segment.
4249 exn = ((s.type & 0xa) == 0 || (s.type & 8));
4251 /* #GP(0) if the source operand is located in an
4252 * execute-only code segment
4254 exn = ((s.type & 0xa) == 8);
4256 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
4259 /* Protected mode: #GP(0)/#SS(0) if the segment is unusable.
4261 exn = (s.unusable != 0);
4264 * Protected mode: #GP(0)/#SS(0) if the memory operand is
4265 * outside the segment limit. All CPUs that support VMX ignore
4266 * limit checks for flat segments, i.e. segments with base==0,
4267 * limit==0xffffffff and of type expand-up data or code.
4269 if (!(s.base == 0 && s.limit == 0xffffffff &&
4270 ((s.type & 8) || !(s.type & 4))))
4271 exn = exn || ((u64)off + len - 1 > s.limit);
4274 kvm_queue_exception_e(vcpu,
4275 seg_reg == VCPU_SREG_SS ?
4276 SS_VECTOR : GP_VECTOR,
4284 static int nested_vmx_get_vmptr(struct kvm_vcpu *vcpu, gpa_t *vmpointer)
4287 struct x86_exception e;
4289 if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION),
4290 vmcs_read32(VMX_INSTRUCTION_INFO), false,
4291 sizeof(*vmpointer), &gva))
4294 if (kvm_read_guest_virt(vcpu, gva, vmpointer, sizeof(*vmpointer), &e)) {
4295 kvm_inject_page_fault(vcpu, &e);
4303 * Allocate a shadow VMCS and associate it with the currently loaded
4304 * VMCS, unless such a shadow VMCS already exists. The newly allocated
4305 * VMCS is also VMCLEARed, so that it is ready for use.
4307 static struct vmcs *alloc_shadow_vmcs(struct kvm_vcpu *vcpu)
4309 struct vcpu_vmx *vmx = to_vmx(vcpu);
4310 struct loaded_vmcs *loaded_vmcs = vmx->loaded_vmcs;
4313 * We should allocate a shadow vmcs for vmcs01 only when L1
4314 * executes VMXON and free it when L1 executes VMXOFF.
4315 * As it is invalid to execute VMXON twice, we shouldn't reach
4316 * here when vmcs01 already have an allocated shadow vmcs.
4318 WARN_ON(loaded_vmcs == &vmx->vmcs01 && loaded_vmcs->shadow_vmcs);
4320 if (!loaded_vmcs->shadow_vmcs) {
4321 loaded_vmcs->shadow_vmcs = alloc_vmcs(true);
4322 if (loaded_vmcs->shadow_vmcs)
4323 vmcs_clear(loaded_vmcs->shadow_vmcs);
4325 return loaded_vmcs->shadow_vmcs;
4328 static int enter_vmx_operation(struct kvm_vcpu *vcpu)
4330 struct vcpu_vmx *vmx = to_vmx(vcpu);
4333 r = alloc_loaded_vmcs(&vmx->nested.vmcs02);
4337 vmx->nested.cached_vmcs12 = kzalloc(VMCS12_SIZE, GFP_KERNEL_ACCOUNT);
4338 if (!vmx->nested.cached_vmcs12)
4339 goto out_cached_vmcs12;
4341 vmx->nested.cached_shadow_vmcs12 = kzalloc(VMCS12_SIZE, GFP_KERNEL_ACCOUNT);
4342 if (!vmx->nested.cached_shadow_vmcs12)
4343 goto out_cached_shadow_vmcs12;
4345 if (enable_shadow_vmcs && !alloc_shadow_vmcs(vcpu))
4346 goto out_shadow_vmcs;
4348 hrtimer_init(&vmx->nested.preemption_timer, CLOCK_MONOTONIC,
4349 HRTIMER_MODE_REL_PINNED);
4350 vmx->nested.preemption_timer.function = vmx_preemption_timer_fn;
4352 vmx->nested.vpid02 = allocate_vpid();
4354 vmx->nested.vmcs02_initialized = false;
4355 vmx->nested.vmxon = true;
4357 if (pt_mode == PT_MODE_HOST_GUEST) {
4358 vmx->pt_desc.guest.ctl = 0;
4359 pt_update_intercept_for_msr(vmx);
4365 kfree(vmx->nested.cached_shadow_vmcs12);
4367 out_cached_shadow_vmcs12:
4368 kfree(vmx->nested.cached_vmcs12);
4371 free_loaded_vmcs(&vmx->nested.vmcs02);
4378 * Emulate the VMXON instruction.
4379 * Currently, we just remember that VMX is active, and do not save or even
4380 * inspect the argument to VMXON (the so-called "VMXON pointer") because we
4381 * do not currently need to store anything in that guest-allocated memory
4382 * region. Consequently, VMCLEAR and VMPTRLD also do not verify that the their
4383 * argument is different from the VMXON pointer (which the spec says they do).
4385 static int handle_vmon(struct kvm_vcpu *vcpu)
4390 struct vcpu_vmx *vmx = to_vmx(vcpu);
4391 const u64 VMXON_NEEDED_FEATURES = FEATURE_CONTROL_LOCKED
4392 | FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
4395 * The Intel VMX Instruction Reference lists a bunch of bits that are
4396 * prerequisite to running VMXON, most notably cr4.VMXE must be set to
4397 * 1 (see vmx_set_cr4() for when we allow the guest to set this).
4398 * Otherwise, we should fail with #UD. But most faulting conditions
4399 * have already been checked by hardware, prior to the VM-exit for
4400 * VMXON. We do test guest cr4.VMXE because processor CR4 always has
4401 * that bit set to 1 in non-root mode.
4403 if (!kvm_read_cr4_bits(vcpu, X86_CR4_VMXE)) {
4404 kvm_queue_exception(vcpu, UD_VECTOR);
4408 /* CPL=0 must be checked manually. */
4409 if (vmx_get_cpl(vcpu)) {
4410 kvm_inject_gp(vcpu, 0);
4414 if (vmx->nested.vmxon)
4415 return nested_vmx_failValid(vcpu,
4416 VMXERR_VMXON_IN_VMX_ROOT_OPERATION);
4418 if ((vmx->msr_ia32_feature_control & VMXON_NEEDED_FEATURES)
4419 != VMXON_NEEDED_FEATURES) {
4420 kvm_inject_gp(vcpu, 0);
4424 if (nested_vmx_get_vmptr(vcpu, &vmptr))
4429 * The first 4 bytes of VMXON region contain the supported
4430 * VMCS revision identifier
4432 * Note - IA32_VMX_BASIC[48] will never be 1 for the nested case;
4433 * which replaces physical address width with 32
4435 if (!page_address_valid(vcpu, vmptr))
4436 return nested_vmx_failInvalid(vcpu);
4438 if (kvm_read_guest(vcpu->kvm, vmptr, &revision, sizeof(revision)) ||
4439 revision != VMCS12_REVISION)
4440 return nested_vmx_failInvalid(vcpu);
4442 vmx->nested.vmxon_ptr = vmptr;
4443 ret = enter_vmx_operation(vcpu);
4447 return nested_vmx_succeed(vcpu);
4450 static inline void nested_release_vmcs12(struct kvm_vcpu *vcpu)
4452 struct vcpu_vmx *vmx = to_vmx(vcpu);
4454 if (vmx->nested.current_vmptr == -1ull)
4457 copy_vmcs02_to_vmcs12_rare(vcpu, get_vmcs12(vcpu));
4459 if (enable_shadow_vmcs) {
4460 /* copy to memory all shadowed fields in case
4461 they were modified */
4462 copy_shadow_to_vmcs12(vmx);
4463 vmx_disable_shadow_vmcs(vmx);
4465 vmx->nested.posted_intr_nv = -1;
4467 /* Flush VMCS12 to guest memory */
4468 kvm_vcpu_write_guest_page(vcpu,
4469 vmx->nested.current_vmptr >> PAGE_SHIFT,
4470 vmx->nested.cached_vmcs12, 0, VMCS12_SIZE);
4472 kvm_mmu_free_roots(vcpu, &vcpu->arch.guest_mmu, KVM_MMU_ROOTS_ALL);
4474 vmx->nested.current_vmptr = -1ull;
4477 /* Emulate the VMXOFF instruction */
4478 static int handle_vmoff(struct kvm_vcpu *vcpu)
4480 if (!nested_vmx_check_permission(vcpu))
4485 /* Process a latched INIT during time CPU was in VMX operation */
4486 kvm_make_request(KVM_REQ_EVENT, vcpu);
4488 return nested_vmx_succeed(vcpu);
4491 /* Emulate the VMCLEAR instruction */
4492 static int handle_vmclear(struct kvm_vcpu *vcpu)
4494 struct vcpu_vmx *vmx = to_vmx(vcpu);
4499 if (!nested_vmx_check_permission(vcpu))
4502 if (nested_vmx_get_vmptr(vcpu, &vmptr))
4505 if (!page_address_valid(vcpu, vmptr))
4506 return nested_vmx_failValid(vcpu,
4507 VMXERR_VMCLEAR_INVALID_ADDRESS);
4509 if (vmptr == vmx->nested.vmxon_ptr)
4510 return nested_vmx_failValid(vcpu,
4511 VMXERR_VMCLEAR_VMXON_POINTER);
4514 * When Enlightened VMEntry is enabled on the calling CPU we treat
4515 * memory area pointer by vmptr as Enlightened VMCS (as there's no good
4516 * way to distinguish it from VMCS12) and we must not corrupt it by
4517 * writing to the non-existent 'launch_state' field. The area doesn't
4518 * have to be the currently active EVMCS on the calling CPU and there's
4519 * nothing KVM has to do to transition it from 'active' to 'non-active'
4520 * state. It is possible that the area will stay mapped as
4521 * vmx->nested.hv_evmcs but this shouldn't be a problem.
4523 if (likely(!vmx->nested.enlightened_vmcs_enabled ||
4524 !nested_enlightened_vmentry(vcpu, &evmcs_gpa))) {
4525 if (vmptr == vmx->nested.current_vmptr)
4526 nested_release_vmcs12(vcpu);
4528 kvm_vcpu_write_guest(vcpu,
4529 vmptr + offsetof(struct vmcs12,
4531 &zero, sizeof(zero));
4534 return nested_vmx_succeed(vcpu);
4537 static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch);
4539 /* Emulate the VMLAUNCH instruction */
4540 static int handle_vmlaunch(struct kvm_vcpu *vcpu)
4542 return nested_vmx_run(vcpu, true);
4545 /* Emulate the VMRESUME instruction */
4546 static int handle_vmresume(struct kvm_vcpu *vcpu)
4549 return nested_vmx_run(vcpu, false);
4552 static int handle_vmread(struct kvm_vcpu *vcpu)
4554 unsigned long field;
4556 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
4557 u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
4560 struct vmcs12 *vmcs12;
4561 struct x86_exception e;
4564 if (!nested_vmx_check_permission(vcpu))
4567 if (to_vmx(vcpu)->nested.current_vmptr == -1ull)
4568 return nested_vmx_failInvalid(vcpu);
4570 if (!is_guest_mode(vcpu))
4571 vmcs12 = get_vmcs12(vcpu);
4574 * When vmcs->vmcs_link_pointer is -1ull, any VMREAD
4575 * to shadowed-field sets the ALU flags for VMfailInvalid.
4577 if (get_vmcs12(vcpu)->vmcs_link_pointer == -1ull)
4578 return nested_vmx_failInvalid(vcpu);
4579 vmcs12 = get_shadow_vmcs12(vcpu);
4582 /* Decode instruction info and find the field to read */
4583 field = kvm_register_readl(vcpu, (((vmx_instruction_info) >> 28) & 0xf));
4585 offset = vmcs_field_to_offset(field);
4587 return nested_vmx_failValid(vcpu,
4588 VMXERR_UNSUPPORTED_VMCS_COMPONENT);
4590 if (!is_guest_mode(vcpu) && is_vmcs12_ext_field(field))
4591 copy_vmcs02_to_vmcs12_rare(vcpu, vmcs12);
4593 /* Read the field, zero-extended to a u64 field_value */
4594 field_value = vmcs12_read_any(vmcs12, field, offset);
4597 * Now copy part of this value to register or memory, as requested.
4598 * Note that the number of bits actually copied is 32 or 64 depending
4599 * on the guest's mode (32 or 64 bit), not on the given field's length.
4601 if (vmx_instruction_info & (1u << 10)) {
4602 kvm_register_writel(vcpu, (((vmx_instruction_info) >> 3) & 0xf),
4605 len = is_64_bit_mode(vcpu) ? 8 : 4;
4606 if (get_vmx_mem_address(vcpu, exit_qualification,
4607 vmx_instruction_info, true, len, &gva))
4609 /* _system ok, nested_vmx_check_permission has verified cpl=0 */
4610 if (kvm_write_guest_virt_system(vcpu, gva, &field_value, len, &e))
4611 kvm_inject_page_fault(vcpu, &e);
4614 return nested_vmx_succeed(vcpu);
4617 static bool is_shadow_field_rw(unsigned long field)
4620 #define SHADOW_FIELD_RW(x, y) case x:
4621 #include "vmcs_shadow_fields.h"
4629 static bool is_shadow_field_ro(unsigned long field)
4632 #define SHADOW_FIELD_RO(x, y) case x:
4633 #include "vmcs_shadow_fields.h"
4641 static int handle_vmwrite(struct kvm_vcpu *vcpu)
4643 unsigned long field;
4646 struct vcpu_vmx *vmx = to_vmx(vcpu);
4647 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
4648 u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
4650 /* The value to write might be 32 or 64 bits, depending on L1's long
4651 * mode, and eventually we need to write that into a field of several
4652 * possible lengths. The code below first zero-extends the value to 64
4653 * bit (field_value), and then copies only the appropriate number of
4654 * bits into the vmcs12 field.
4656 u64 field_value = 0;
4657 struct x86_exception e;
4658 struct vmcs12 *vmcs12;
4661 if (!nested_vmx_check_permission(vcpu))
4664 if (vmx->nested.current_vmptr == -1ull)
4665 return nested_vmx_failInvalid(vcpu);
4667 if (vmx_instruction_info & (1u << 10))
4668 field_value = kvm_register_readl(vcpu,
4669 (((vmx_instruction_info) >> 3) & 0xf));
4671 len = is_64_bit_mode(vcpu) ? 8 : 4;
4672 if (get_vmx_mem_address(vcpu, exit_qualification,
4673 vmx_instruction_info, false, len, &gva))
4675 if (kvm_read_guest_virt(vcpu, gva, &field_value, len, &e)) {
4676 kvm_inject_page_fault(vcpu, &e);
4682 field = kvm_register_readl(vcpu, (((vmx_instruction_info) >> 28) & 0xf));
4684 * If the vCPU supports "VMWRITE to any supported field in the
4685 * VMCS," then the "read-only" fields are actually read/write.
4687 if (vmcs_field_readonly(field) &&
4688 !nested_cpu_has_vmwrite_any_field(vcpu))
4689 return nested_vmx_failValid(vcpu,
4690 VMXERR_VMWRITE_READ_ONLY_VMCS_COMPONENT);
4692 if (!is_guest_mode(vcpu)) {
4693 vmcs12 = get_vmcs12(vcpu);
4696 * Ensure vmcs12 is up-to-date before any VMWRITE that dirties
4697 * vmcs12, else we may crush a field or consume a stale value.
4699 if (!is_shadow_field_rw(field))
4700 copy_vmcs02_to_vmcs12_rare(vcpu, vmcs12);
4703 * When vmcs->vmcs_link_pointer is -1ull, any VMWRITE
4704 * to shadowed-field sets the ALU flags for VMfailInvalid.
4706 if (get_vmcs12(vcpu)->vmcs_link_pointer == -1ull)
4707 return nested_vmx_failInvalid(vcpu);
4708 vmcs12 = get_shadow_vmcs12(vcpu);
4711 offset = vmcs_field_to_offset(field);
4713 return nested_vmx_failValid(vcpu,
4714 VMXERR_UNSUPPORTED_VMCS_COMPONENT);
4717 * Some Intel CPUs intentionally drop the reserved bits of the AR byte
4718 * fields on VMWRITE. Emulate this behavior to ensure consistent KVM
4719 * behavior regardless of the underlying hardware, e.g. if an AR_BYTE
4720 * field is intercepted for VMWRITE but not VMREAD (in L1), then VMREAD
4721 * from L1 will return a different value than VMREAD from L2 (L1 sees
4722 * the stripped down value, L2 sees the full value as stored by KVM).
4724 if (field >= GUEST_ES_AR_BYTES && field <= GUEST_TR_AR_BYTES)
4725 field_value &= 0x1f0ff;
4727 vmcs12_write_any(vmcs12, field, offset, field_value);
4730 * Do not track vmcs12 dirty-state if in guest-mode as we actually
4731 * dirty shadow vmcs12 instead of vmcs12. Fields that can be updated
4732 * by L1 without a vmexit are always updated in the vmcs02, i.e. don't
4733 * "dirty" vmcs12, all others go down the prepare_vmcs02() slow path.
4735 if (!is_guest_mode(vcpu) && !is_shadow_field_rw(field)) {
4737 * L1 can read these fields without exiting, ensure the
4738 * shadow VMCS is up-to-date.
4740 if (enable_shadow_vmcs && is_shadow_field_ro(field)) {
4742 vmcs_load(vmx->vmcs01.shadow_vmcs);
4744 __vmcs_writel(field, field_value);
4746 vmcs_clear(vmx->vmcs01.shadow_vmcs);
4747 vmcs_load(vmx->loaded_vmcs->vmcs);
4750 vmx->nested.dirty_vmcs12 = true;
4753 return nested_vmx_succeed(vcpu);
4756 static void set_current_vmptr(struct vcpu_vmx *vmx, gpa_t vmptr)
4758 vmx->nested.current_vmptr = vmptr;
4759 if (enable_shadow_vmcs) {
4760 secondary_exec_controls_setbit(vmx, SECONDARY_EXEC_SHADOW_VMCS);
4761 vmcs_write64(VMCS_LINK_POINTER,
4762 __pa(vmx->vmcs01.shadow_vmcs));
4763 vmx->nested.need_vmcs12_to_shadow_sync = true;
4765 vmx->nested.dirty_vmcs12 = true;
4768 /* Emulate the VMPTRLD instruction */
4769 static int handle_vmptrld(struct kvm_vcpu *vcpu)
4771 struct vcpu_vmx *vmx = to_vmx(vcpu);
4774 if (!nested_vmx_check_permission(vcpu))
4777 if (nested_vmx_get_vmptr(vcpu, &vmptr))
4780 if (!page_address_valid(vcpu, vmptr))
4781 return nested_vmx_failValid(vcpu,
4782 VMXERR_VMPTRLD_INVALID_ADDRESS);
4784 if (vmptr == vmx->nested.vmxon_ptr)
4785 return nested_vmx_failValid(vcpu,
4786 VMXERR_VMPTRLD_VMXON_POINTER);
4788 /* Forbid normal VMPTRLD if Enlightened version was used */
4789 if (vmx->nested.hv_evmcs)
4792 if (vmx->nested.current_vmptr != vmptr) {
4793 struct kvm_host_map map;
4794 struct vmcs12 *new_vmcs12;
4796 if (kvm_vcpu_map(vcpu, gpa_to_gfn(vmptr), &map)) {
4798 * Reads from an unbacked page return all 1s,
4799 * which means that the 32 bits located at the
4800 * given physical address won't match the required
4801 * VMCS12_REVISION identifier.
4803 return nested_vmx_failValid(vcpu,
4804 VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID);
4807 new_vmcs12 = map.hva;
4809 if (new_vmcs12->hdr.revision_id != VMCS12_REVISION ||
4810 (new_vmcs12->hdr.shadow_vmcs &&
4811 !nested_cpu_has_vmx_shadow_vmcs(vcpu))) {
4812 kvm_vcpu_unmap(vcpu, &map, false);
4813 return nested_vmx_failValid(vcpu,
4814 VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID);
4817 nested_release_vmcs12(vcpu);
4820 * Load VMCS12 from guest memory since it is not already
4823 memcpy(vmx->nested.cached_vmcs12, new_vmcs12, VMCS12_SIZE);
4824 kvm_vcpu_unmap(vcpu, &map, false);
4826 set_current_vmptr(vmx, vmptr);
4829 return nested_vmx_succeed(vcpu);
4832 /* Emulate the VMPTRST instruction */
4833 static int handle_vmptrst(struct kvm_vcpu *vcpu)
4835 unsigned long exit_qual = vmcs_readl(EXIT_QUALIFICATION);
4836 u32 instr_info = vmcs_read32(VMX_INSTRUCTION_INFO);
4837 gpa_t current_vmptr = to_vmx(vcpu)->nested.current_vmptr;
4838 struct x86_exception e;
4841 if (!nested_vmx_check_permission(vcpu))
4844 if (unlikely(to_vmx(vcpu)->nested.hv_evmcs))
4847 if (get_vmx_mem_address(vcpu, exit_qual, instr_info,
4848 true, sizeof(gpa_t), &gva))
4850 /* *_system ok, nested_vmx_check_permission has verified cpl=0 */
4851 if (kvm_write_guest_virt_system(vcpu, gva, (void *)¤t_vmptr,
4852 sizeof(gpa_t), &e)) {
4853 kvm_inject_page_fault(vcpu, &e);
4856 return nested_vmx_succeed(vcpu);
4859 /* Emulate the INVEPT instruction */
4860 static int handle_invept(struct kvm_vcpu *vcpu)
4862 struct vcpu_vmx *vmx = to_vmx(vcpu);
4863 u32 vmx_instruction_info, types;
4866 struct x86_exception e;
4871 if (!(vmx->nested.msrs.secondary_ctls_high &
4872 SECONDARY_EXEC_ENABLE_EPT) ||
4873 !(vmx->nested.msrs.ept_caps & VMX_EPT_INVEPT_BIT)) {
4874 kvm_queue_exception(vcpu, UD_VECTOR);
4878 if (!nested_vmx_check_permission(vcpu))
4881 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
4882 type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf);
4884 types = (vmx->nested.msrs.ept_caps >> VMX_EPT_EXTENT_SHIFT) & 6;
4886 if (type >= 32 || !(types & (1 << type)))
4887 return nested_vmx_failValid(vcpu,
4888 VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
4890 /* According to the Intel VMX instruction reference, the memory
4891 * operand is read even if it isn't needed (e.g., for type==global)
4893 if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION),
4894 vmx_instruction_info, false, sizeof(operand), &gva))
4896 if (kvm_read_guest_virt(vcpu, gva, &operand, sizeof(operand), &e)) {
4897 kvm_inject_page_fault(vcpu, &e);
4902 case VMX_EPT_EXTENT_GLOBAL:
4903 case VMX_EPT_EXTENT_CONTEXT:
4905 * TODO: Sync the necessary shadow EPT roots here, rather than
4906 * at the next emulated VM-entry.
4914 return nested_vmx_succeed(vcpu);
4917 static int handle_invvpid(struct kvm_vcpu *vcpu)
4919 struct vcpu_vmx *vmx = to_vmx(vcpu);
4920 u32 vmx_instruction_info;
4921 unsigned long type, types;
4923 struct x86_exception e;
4930 if (!(vmx->nested.msrs.secondary_ctls_high &
4931 SECONDARY_EXEC_ENABLE_VPID) ||
4932 !(vmx->nested.msrs.vpid_caps & VMX_VPID_INVVPID_BIT)) {
4933 kvm_queue_exception(vcpu, UD_VECTOR);
4937 if (!nested_vmx_check_permission(vcpu))
4940 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
4941 type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf);
4943 types = (vmx->nested.msrs.vpid_caps &
4944 VMX_VPID_EXTENT_SUPPORTED_MASK) >> 8;
4946 if (type >= 32 || !(types & (1 << type)))
4947 return nested_vmx_failValid(vcpu,
4948 VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
4950 /* according to the intel vmx instruction reference, the memory
4951 * operand is read even if it isn't needed (e.g., for type==global)
4953 if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION),
4954 vmx_instruction_info, false, sizeof(operand), &gva))
4956 if (kvm_read_guest_virt(vcpu, gva, &operand, sizeof(operand), &e)) {
4957 kvm_inject_page_fault(vcpu, &e);
4960 if (operand.vpid >> 16)
4961 return nested_vmx_failValid(vcpu,
4962 VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
4964 vpid02 = nested_get_vpid02(vcpu);
4966 case VMX_VPID_EXTENT_INDIVIDUAL_ADDR:
4967 if (!operand.vpid ||
4968 is_noncanonical_address(operand.gla, vcpu))
4969 return nested_vmx_failValid(vcpu,
4970 VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
4971 if (cpu_has_vmx_invvpid_individual_addr()) {
4972 __invvpid(VMX_VPID_EXTENT_INDIVIDUAL_ADDR,
4973 vpid02, operand.gla);
4975 __vmx_flush_tlb(vcpu, vpid02, false);
4977 case VMX_VPID_EXTENT_SINGLE_CONTEXT:
4978 case VMX_VPID_EXTENT_SINGLE_NON_GLOBAL:
4980 return nested_vmx_failValid(vcpu,
4981 VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
4982 __vmx_flush_tlb(vcpu, vpid02, false);
4984 case VMX_VPID_EXTENT_ALL_CONTEXT:
4985 __vmx_flush_tlb(vcpu, vpid02, false);
4989 return kvm_skip_emulated_instruction(vcpu);
4992 return nested_vmx_succeed(vcpu);
4995 static int nested_vmx_eptp_switching(struct kvm_vcpu *vcpu,
4996 struct vmcs12 *vmcs12)
4998 u32 index = kvm_rcx_read(vcpu);
5000 bool accessed_dirty;
5001 struct kvm_mmu *mmu = vcpu->arch.walk_mmu;
5003 if (!nested_cpu_has_eptp_switching(vmcs12) ||
5004 !nested_cpu_has_ept(vmcs12))
5007 if (index >= VMFUNC_EPTP_ENTRIES)
5011 if (kvm_vcpu_read_guest_page(vcpu, vmcs12->eptp_list_address >> PAGE_SHIFT,
5012 &address, index * 8, 8))
5015 accessed_dirty = !!(address & VMX_EPTP_AD_ENABLE_BIT);
5018 * If the (L2) guest does a vmfunc to the currently
5019 * active ept pointer, we don't have to do anything else
5021 if (vmcs12->ept_pointer != address) {
5022 if (!valid_ept_address(vcpu, address))
5025 kvm_mmu_unload(vcpu);
5026 mmu->ept_ad = accessed_dirty;
5027 mmu->mmu_role.base.ad_disabled = !accessed_dirty;
5028 vmcs12->ept_pointer = address;
5030 * TODO: Check what's the correct approach in case
5031 * mmu reload fails. Currently, we just let the next
5032 * reload potentially fail
5034 kvm_mmu_reload(vcpu);
5040 static int handle_vmfunc(struct kvm_vcpu *vcpu)
5042 struct vcpu_vmx *vmx = to_vmx(vcpu);
5043 struct vmcs12 *vmcs12;
5044 u32 function = kvm_rax_read(vcpu);
5047 * VMFUNC is only supported for nested guests, but we always enable the
5048 * secondary control for simplicity; for non-nested mode, fake that we
5049 * didn't by injecting #UD.
5051 if (!is_guest_mode(vcpu)) {
5052 kvm_queue_exception(vcpu, UD_VECTOR);
5056 vmcs12 = get_vmcs12(vcpu);
5057 if ((vmcs12->vm_function_control & (1 << function)) == 0)
5062 if (nested_vmx_eptp_switching(vcpu, vmcs12))
5068 return kvm_skip_emulated_instruction(vcpu);
5071 nested_vmx_vmexit(vcpu, vmx->exit_reason,
5072 vmcs_read32(VM_EXIT_INTR_INFO),
5073 vmcs_readl(EXIT_QUALIFICATION));
5078 static bool nested_vmx_exit_handled_io(struct kvm_vcpu *vcpu,
5079 struct vmcs12 *vmcs12)
5081 unsigned long exit_qualification;
5082 gpa_t bitmap, last_bitmap;
5087 if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS))
5088 return nested_cpu_has(vmcs12, CPU_BASED_UNCOND_IO_EXITING);
5090 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
5092 port = exit_qualification >> 16;
5093 size = (exit_qualification & 7) + 1;
5095 last_bitmap = (gpa_t)-1;
5100 bitmap = vmcs12->io_bitmap_a;
5101 else if (port < 0x10000)
5102 bitmap = vmcs12->io_bitmap_b;
5105 bitmap += (port & 0x7fff) / 8;
5107 if (last_bitmap != bitmap)
5108 if (kvm_vcpu_read_guest(vcpu, bitmap, &b, 1))
5110 if (b & (1 << (port & 7)))
5115 last_bitmap = bitmap;
5122 * Return 1 if we should exit from L2 to L1 to handle an MSR access access,
5123 * rather than handle it ourselves in L0. I.e., check whether L1 expressed
5124 * disinterest in the current event (read or write a specific MSR) by using an
5125 * MSR bitmap. This may be the case even when L0 doesn't use MSR bitmaps.
5127 static bool nested_vmx_exit_handled_msr(struct kvm_vcpu *vcpu,
5128 struct vmcs12 *vmcs12, u32 exit_reason)
5130 u32 msr_index = kvm_rcx_read(vcpu);
5133 if (!nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS))
5137 * The MSR_BITMAP page is divided into four 1024-byte bitmaps,
5138 * for the four combinations of read/write and low/high MSR numbers.
5139 * First we need to figure out which of the four to use:
5141 bitmap = vmcs12->msr_bitmap;
5142 if (exit_reason == EXIT_REASON_MSR_WRITE)
5144 if (msr_index >= 0xc0000000) {
5145 msr_index -= 0xc0000000;
5149 /* Then read the msr_index'th bit from this bitmap: */
5150 if (msr_index < 1024*8) {
5152 if (kvm_vcpu_read_guest(vcpu, bitmap + msr_index/8, &b, 1))
5154 return 1 & (b >> (msr_index & 7));
5156 return true; /* let L1 handle the wrong parameter */
5160 * Return 1 if we should exit from L2 to L1 to handle a CR access exit,
5161 * rather than handle it ourselves in L0. I.e., check if L1 wanted to
5162 * intercept (via guest_host_mask etc.) the current event.
5164 static bool nested_vmx_exit_handled_cr(struct kvm_vcpu *vcpu,
5165 struct vmcs12 *vmcs12)
5167 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
5168 int cr = exit_qualification & 15;
5172 switch ((exit_qualification >> 4) & 3) {
5173 case 0: /* mov to cr */
5174 reg = (exit_qualification >> 8) & 15;
5175 val = kvm_register_readl(vcpu, reg);
5178 if (vmcs12->cr0_guest_host_mask &
5179 (val ^ vmcs12->cr0_read_shadow))
5183 if ((vmcs12->cr3_target_count >= 1 &&
5184 vmcs12->cr3_target_value0 == val) ||
5185 (vmcs12->cr3_target_count >= 2 &&
5186 vmcs12->cr3_target_value1 == val) ||
5187 (vmcs12->cr3_target_count >= 3 &&
5188 vmcs12->cr3_target_value2 == val) ||
5189 (vmcs12->cr3_target_count >= 4 &&
5190 vmcs12->cr3_target_value3 == val))
5192 if (nested_cpu_has(vmcs12, CPU_BASED_CR3_LOAD_EXITING))
5196 if (vmcs12->cr4_guest_host_mask &
5197 (vmcs12->cr4_read_shadow ^ val))
5201 if (nested_cpu_has(vmcs12, CPU_BASED_CR8_LOAD_EXITING))
5207 if ((vmcs12->cr0_guest_host_mask & X86_CR0_TS) &&
5208 (vmcs12->cr0_read_shadow & X86_CR0_TS))
5211 case 1: /* mov from cr */
5214 if (vmcs12->cpu_based_vm_exec_control &
5215 CPU_BASED_CR3_STORE_EXITING)
5219 if (vmcs12->cpu_based_vm_exec_control &
5220 CPU_BASED_CR8_STORE_EXITING)
5227 * lmsw can change bits 1..3 of cr0, and only set bit 0 of
5228 * cr0. Other attempted changes are ignored, with no exit.
5230 val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f;
5231 if (vmcs12->cr0_guest_host_mask & 0xe &
5232 (val ^ vmcs12->cr0_read_shadow))
5234 if ((vmcs12->cr0_guest_host_mask & 0x1) &&
5235 !(vmcs12->cr0_read_shadow & 0x1) &&
5243 static bool nested_vmx_exit_handled_vmcs_access(struct kvm_vcpu *vcpu,
5244 struct vmcs12 *vmcs12, gpa_t bitmap)
5246 u32 vmx_instruction_info;
5247 unsigned long field;
5250 if (!nested_cpu_has_shadow_vmcs(vmcs12))
5253 /* Decode instruction info and find the field to access */
5254 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
5255 field = kvm_register_read(vcpu, (((vmx_instruction_info) >> 28) & 0xf));
5257 /* Out-of-range fields always cause a VM exit from L2 to L1 */
5261 if (kvm_vcpu_read_guest(vcpu, bitmap + field/8, &b, 1))
5264 return 1 & (b >> (field & 7));
5268 * Return 1 if we should exit from L2 to L1 to handle an exit, or 0 if we
5269 * should handle it ourselves in L0 (and then continue L2). Only call this
5270 * when in is_guest_mode (L2).
5272 bool nested_vmx_exit_reflected(struct kvm_vcpu *vcpu, u32 exit_reason)
5274 u32 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
5275 struct vcpu_vmx *vmx = to_vmx(vcpu);
5276 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
5278 if (vmx->nested.nested_run_pending)
5281 if (unlikely(vmx->fail)) {
5282 trace_kvm_nested_vmenter_failed(
5283 "hardware VM-instruction error: ",
5284 vmcs_read32(VM_INSTRUCTION_ERROR));
5289 * The host physical addresses of some pages of guest memory
5290 * are loaded into the vmcs02 (e.g. vmcs12's Virtual APIC
5291 * Page). The CPU may write to these pages via their host
5292 * physical address while L2 is running, bypassing any
5293 * address-translation-based dirty tracking (e.g. EPT write
5296 * Mark them dirty on every exit from L2 to prevent them from
5297 * getting out of sync with dirty tracking.
5299 nested_mark_vmcs12_pages_dirty(vcpu);
5301 trace_kvm_nested_vmexit(kvm_rip_read(vcpu), exit_reason,
5302 vmcs_readl(EXIT_QUALIFICATION),
5303 vmx->idt_vectoring_info,
5305 vmcs_read32(VM_EXIT_INTR_ERROR_CODE),
5308 switch (exit_reason) {
5309 case EXIT_REASON_EXCEPTION_NMI:
5310 if (is_nmi(intr_info))
5312 else if (is_page_fault(intr_info))
5313 return !vmx->vcpu.arch.apf.host_apf_reason && enable_ept;
5314 else if (is_debug(intr_info) &&
5316 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
5318 else if (is_breakpoint(intr_info) &&
5319 vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
5321 return vmcs12->exception_bitmap &
5322 (1u << (intr_info & INTR_INFO_VECTOR_MASK));
5323 case EXIT_REASON_EXTERNAL_INTERRUPT:
5325 case EXIT_REASON_TRIPLE_FAULT:
5327 case EXIT_REASON_PENDING_INTERRUPT:
5328 return nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_INTR_PENDING);
5329 case EXIT_REASON_NMI_WINDOW:
5330 return nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_NMI_PENDING);
5331 case EXIT_REASON_TASK_SWITCH:
5333 case EXIT_REASON_CPUID:
5335 case EXIT_REASON_HLT:
5336 return nested_cpu_has(vmcs12, CPU_BASED_HLT_EXITING);
5337 case EXIT_REASON_INVD:
5339 case EXIT_REASON_INVLPG:
5340 return nested_cpu_has(vmcs12, CPU_BASED_INVLPG_EXITING);
5341 case EXIT_REASON_RDPMC:
5342 return nested_cpu_has(vmcs12, CPU_BASED_RDPMC_EXITING);
5343 case EXIT_REASON_RDRAND:
5344 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_RDRAND_EXITING);
5345 case EXIT_REASON_RDSEED:
5346 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_RDSEED_EXITING);
5347 case EXIT_REASON_RDTSC: case EXIT_REASON_RDTSCP:
5348 return nested_cpu_has(vmcs12, CPU_BASED_RDTSC_EXITING);
5349 case EXIT_REASON_VMREAD:
5350 return nested_vmx_exit_handled_vmcs_access(vcpu, vmcs12,
5351 vmcs12->vmread_bitmap);
5352 case EXIT_REASON_VMWRITE:
5353 return nested_vmx_exit_handled_vmcs_access(vcpu, vmcs12,
5354 vmcs12->vmwrite_bitmap);
5355 case EXIT_REASON_VMCALL: case EXIT_REASON_VMCLEAR:
5356 case EXIT_REASON_VMLAUNCH: case EXIT_REASON_VMPTRLD:
5357 case EXIT_REASON_VMPTRST: case EXIT_REASON_VMRESUME:
5358 case EXIT_REASON_VMOFF: case EXIT_REASON_VMON:
5359 case EXIT_REASON_INVEPT: case EXIT_REASON_INVVPID:
5361 * VMX instructions trap unconditionally. This allows L1 to
5362 * emulate them for its L2 guest, i.e., allows 3-level nesting!
5365 case EXIT_REASON_CR_ACCESS:
5366 return nested_vmx_exit_handled_cr(vcpu, vmcs12);
5367 case EXIT_REASON_DR_ACCESS:
5368 return nested_cpu_has(vmcs12, CPU_BASED_MOV_DR_EXITING);
5369 case EXIT_REASON_IO_INSTRUCTION:
5370 return nested_vmx_exit_handled_io(vcpu, vmcs12);
5371 case EXIT_REASON_GDTR_IDTR: case EXIT_REASON_LDTR_TR:
5372 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_DESC);
5373 case EXIT_REASON_MSR_READ:
5374 case EXIT_REASON_MSR_WRITE:
5375 return nested_vmx_exit_handled_msr(vcpu, vmcs12, exit_reason);
5376 case EXIT_REASON_INVALID_STATE:
5378 case EXIT_REASON_MWAIT_INSTRUCTION:
5379 return nested_cpu_has(vmcs12, CPU_BASED_MWAIT_EXITING);
5380 case EXIT_REASON_MONITOR_TRAP_FLAG:
5381 return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_TRAP_FLAG);
5382 case EXIT_REASON_MONITOR_INSTRUCTION:
5383 return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_EXITING);
5384 case EXIT_REASON_PAUSE_INSTRUCTION:
5385 return nested_cpu_has(vmcs12, CPU_BASED_PAUSE_EXITING) ||
5386 nested_cpu_has2(vmcs12,
5387 SECONDARY_EXEC_PAUSE_LOOP_EXITING);
5388 case EXIT_REASON_MCE_DURING_VMENTRY:
5390 case EXIT_REASON_TPR_BELOW_THRESHOLD:
5391 return nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW);
5392 case EXIT_REASON_APIC_ACCESS:
5393 case EXIT_REASON_APIC_WRITE:
5394 case EXIT_REASON_EOI_INDUCED:
5396 * The controls for "virtualize APIC accesses," "APIC-
5397 * register virtualization," and "virtual-interrupt
5398 * delivery" only come from vmcs12.
5401 case EXIT_REASON_EPT_VIOLATION:
5403 * L0 always deals with the EPT violation. If nested EPT is
5404 * used, and the nested mmu code discovers that the address is
5405 * missing in the guest EPT table (EPT12), the EPT violation
5406 * will be injected with nested_ept_inject_page_fault()
5409 case EXIT_REASON_EPT_MISCONFIG:
5411 * L2 never uses directly L1's EPT, but rather L0's own EPT
5412 * table (shadow on EPT) or a merged EPT table that L0 built
5413 * (EPT on EPT). So any problems with the structure of the
5414 * table is L0's fault.
5417 case EXIT_REASON_INVPCID:
5419 nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_INVPCID) &&
5420 nested_cpu_has(vmcs12, CPU_BASED_INVLPG_EXITING);
5421 case EXIT_REASON_WBINVD:
5422 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_WBINVD_EXITING);
5423 case EXIT_REASON_XSETBV:
5425 case EXIT_REASON_XSAVES: case EXIT_REASON_XRSTORS:
5427 * This should never happen, since it is not possible to
5428 * set XSS to a non-zero value---neither in L1 nor in L2.
5429 * If if it were, XSS would have to be checked against
5430 * the XSS exit bitmap in vmcs12.
5432 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES);
5433 case EXIT_REASON_PREEMPTION_TIMER:
5435 case EXIT_REASON_PML_FULL:
5436 /* We emulate PML support to L1. */
5438 case EXIT_REASON_VMFUNC:
5439 /* VM functions are emulated through L2->L0 vmexits. */
5441 case EXIT_REASON_ENCLS:
5442 /* SGX is never exposed to L1 */
5450 static int vmx_get_nested_state(struct kvm_vcpu *vcpu,
5451 struct kvm_nested_state __user *user_kvm_nested_state,
5454 struct vcpu_vmx *vmx;
5455 struct vmcs12 *vmcs12;
5456 struct kvm_nested_state kvm_state = {
5458 .format = KVM_STATE_NESTED_FORMAT_VMX,
5459 .size = sizeof(kvm_state),
5460 .hdr.vmx.vmxon_pa = -1ull,
5461 .hdr.vmx.vmcs12_pa = -1ull,
5463 struct kvm_vmx_nested_state_data __user *user_vmx_nested_state =
5464 &user_kvm_nested_state->data.vmx[0];
5467 return kvm_state.size + sizeof(*user_vmx_nested_state);
5470 vmcs12 = get_vmcs12(vcpu);
5472 if (nested_vmx_allowed(vcpu) &&
5473 (vmx->nested.vmxon || vmx->nested.smm.vmxon)) {
5474 kvm_state.hdr.vmx.vmxon_pa = vmx->nested.vmxon_ptr;
5475 kvm_state.hdr.vmx.vmcs12_pa = vmx->nested.current_vmptr;
5477 if (vmx_has_valid_vmcs12(vcpu)) {
5478 kvm_state.size += sizeof(user_vmx_nested_state->vmcs12);
5480 if (vmx->nested.hv_evmcs)
5481 kvm_state.flags |= KVM_STATE_NESTED_EVMCS;
5483 if (is_guest_mode(vcpu) &&
5484 nested_cpu_has_shadow_vmcs(vmcs12) &&
5485 vmcs12->vmcs_link_pointer != -1ull)
5486 kvm_state.size += sizeof(user_vmx_nested_state->shadow_vmcs12);
5489 if (vmx->nested.smm.vmxon)
5490 kvm_state.hdr.vmx.smm.flags |= KVM_STATE_NESTED_SMM_VMXON;
5492 if (vmx->nested.smm.guest_mode)
5493 kvm_state.hdr.vmx.smm.flags |= KVM_STATE_NESTED_SMM_GUEST_MODE;
5495 if (is_guest_mode(vcpu)) {
5496 kvm_state.flags |= KVM_STATE_NESTED_GUEST_MODE;
5498 if (vmx->nested.nested_run_pending)
5499 kvm_state.flags |= KVM_STATE_NESTED_RUN_PENDING;
5503 if (user_data_size < kvm_state.size)
5506 if (copy_to_user(user_kvm_nested_state, &kvm_state, sizeof(kvm_state)))
5509 if (!vmx_has_valid_vmcs12(vcpu))
5513 * When running L2, the authoritative vmcs12 state is in the
5514 * vmcs02. When running L1, the authoritative vmcs12 state is
5515 * in the shadow or enlightened vmcs linked to vmcs01, unless
5516 * need_vmcs12_to_shadow_sync is set, in which case, the authoritative
5517 * vmcs12 state is in the vmcs12 already.
5519 if (is_guest_mode(vcpu)) {
5520 sync_vmcs02_to_vmcs12(vcpu, vmcs12);
5521 sync_vmcs02_to_vmcs12_rare(vcpu, vmcs12);
5522 } else if (!vmx->nested.need_vmcs12_to_shadow_sync) {
5523 if (vmx->nested.hv_evmcs)
5524 copy_enlightened_to_vmcs12(vmx);
5525 else if (enable_shadow_vmcs)
5526 copy_shadow_to_vmcs12(vmx);
5529 BUILD_BUG_ON(sizeof(user_vmx_nested_state->vmcs12) < VMCS12_SIZE);
5530 BUILD_BUG_ON(sizeof(user_vmx_nested_state->shadow_vmcs12) < VMCS12_SIZE);
5533 * Copy over the full allocated size of vmcs12 rather than just the size
5536 if (copy_to_user(user_vmx_nested_state->vmcs12, vmcs12, VMCS12_SIZE))
5539 if (nested_cpu_has_shadow_vmcs(vmcs12) &&
5540 vmcs12->vmcs_link_pointer != -1ull) {
5541 if (copy_to_user(user_vmx_nested_state->shadow_vmcs12,
5542 get_shadow_vmcs12(vcpu), VMCS12_SIZE))
5547 return kvm_state.size;
5551 * Forcibly leave nested mode in order to be able to reset the VCPU later on.
5553 void vmx_leave_nested(struct kvm_vcpu *vcpu)
5555 if (is_guest_mode(vcpu)) {
5556 to_vmx(vcpu)->nested.nested_run_pending = 0;
5557 nested_vmx_vmexit(vcpu, -1, 0, 0);
5562 static int vmx_set_nested_state(struct kvm_vcpu *vcpu,
5563 struct kvm_nested_state __user *user_kvm_nested_state,
5564 struct kvm_nested_state *kvm_state)
5566 struct vcpu_vmx *vmx = to_vmx(vcpu);
5567 struct vmcs12 *vmcs12;
5569 struct kvm_vmx_nested_state_data __user *user_vmx_nested_state =
5570 &user_kvm_nested_state->data.vmx[0];
5573 if (kvm_state->format != KVM_STATE_NESTED_FORMAT_VMX)
5576 if (kvm_state->hdr.vmx.vmxon_pa == -1ull) {
5577 if (kvm_state->hdr.vmx.smm.flags)
5580 if (kvm_state->hdr.vmx.vmcs12_pa != -1ull)
5584 * KVM_STATE_NESTED_EVMCS used to signal that KVM should
5585 * enable eVMCS capability on vCPU. However, since then
5586 * code was changed such that flag signals vmcs12 should
5587 * be copied into eVMCS in guest memory.
5589 * To preserve backwards compatability, allow user
5590 * to set this flag even when there is no VMXON region.
5592 if (kvm_state->flags & ~KVM_STATE_NESTED_EVMCS)
5595 if (!nested_vmx_allowed(vcpu))
5598 if (!page_address_valid(vcpu, kvm_state->hdr.vmx.vmxon_pa))
5602 if ((kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) &&
5603 (kvm_state->flags & KVM_STATE_NESTED_GUEST_MODE))
5606 if (kvm_state->hdr.vmx.smm.flags &
5607 ~(KVM_STATE_NESTED_SMM_GUEST_MODE | KVM_STATE_NESTED_SMM_VMXON))
5611 * SMM temporarily disables VMX, so we cannot be in guest mode,
5612 * nor can VMLAUNCH/VMRESUME be pending. Outside SMM, SMM flags
5617 (KVM_STATE_NESTED_GUEST_MODE | KVM_STATE_NESTED_RUN_PENDING))
5618 : kvm_state->hdr.vmx.smm.flags)
5621 if ((kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) &&
5622 !(kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_VMXON))
5625 if ((kvm_state->flags & KVM_STATE_NESTED_EVMCS) &&
5626 (!nested_vmx_allowed(vcpu) || !vmx->nested.enlightened_vmcs_enabled))
5629 vmx_leave_nested(vcpu);
5631 if (kvm_state->hdr.vmx.vmxon_pa == -1ull)
5634 vmx->nested.vmxon_ptr = kvm_state->hdr.vmx.vmxon_pa;
5635 ret = enter_vmx_operation(vcpu);
5639 /* Empty 'VMXON' state is permitted */
5640 if (kvm_state->size < sizeof(*kvm_state) + sizeof(*vmcs12))
5643 if (kvm_state->hdr.vmx.vmcs12_pa != -1ull) {
5644 if (kvm_state->hdr.vmx.vmcs12_pa == kvm_state->hdr.vmx.vmxon_pa ||
5645 !page_address_valid(vcpu, kvm_state->hdr.vmx.vmcs12_pa))
5648 set_current_vmptr(vmx, kvm_state->hdr.vmx.vmcs12_pa);
5649 } else if (kvm_state->flags & KVM_STATE_NESTED_EVMCS) {
5651 * Sync eVMCS upon entry as we may not have
5652 * HV_X64_MSR_VP_ASSIST_PAGE set up yet.
5654 vmx->nested.need_vmcs12_to_shadow_sync = true;
5659 if (kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_VMXON) {
5660 vmx->nested.smm.vmxon = true;
5661 vmx->nested.vmxon = false;
5663 if (kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE)
5664 vmx->nested.smm.guest_mode = true;
5667 vmcs12 = get_vmcs12(vcpu);
5668 if (copy_from_user(vmcs12, user_vmx_nested_state->vmcs12, sizeof(*vmcs12)))
5671 if (vmcs12->hdr.revision_id != VMCS12_REVISION)
5674 if (!(kvm_state->flags & KVM_STATE_NESTED_GUEST_MODE))
5677 vmx->nested.nested_run_pending =
5678 !!(kvm_state->flags & KVM_STATE_NESTED_RUN_PENDING);
5681 if (nested_cpu_has_shadow_vmcs(vmcs12) &&
5682 vmcs12->vmcs_link_pointer != -1ull) {
5683 struct vmcs12 *shadow_vmcs12 = get_shadow_vmcs12(vcpu);
5685 if (kvm_state->size <
5686 sizeof(*kvm_state) +
5687 sizeof(user_vmx_nested_state->vmcs12) + sizeof(*shadow_vmcs12))
5688 goto error_guest_mode;
5690 if (copy_from_user(shadow_vmcs12,
5691 user_vmx_nested_state->shadow_vmcs12,
5692 sizeof(*shadow_vmcs12))) {
5694 goto error_guest_mode;
5697 if (shadow_vmcs12->hdr.revision_id != VMCS12_REVISION ||
5698 !shadow_vmcs12->hdr.shadow_vmcs)
5699 goto error_guest_mode;
5702 if (nested_vmx_check_controls(vcpu, vmcs12) ||
5703 nested_vmx_check_host_state(vcpu, vmcs12) ||
5704 nested_vmx_check_guest_state(vcpu, vmcs12, &exit_qual))
5705 goto error_guest_mode;
5707 vmx->nested.dirty_vmcs12 = true;
5708 ret = nested_vmx_enter_non_root_mode(vcpu, false);
5710 goto error_guest_mode;
5715 vmx->nested.nested_run_pending = 0;
5719 void nested_vmx_vcpu_setup(void)
5721 if (enable_shadow_vmcs) {
5722 vmcs_write64(VMREAD_BITMAP, __pa(vmx_vmread_bitmap));
5723 vmcs_write64(VMWRITE_BITMAP, __pa(vmx_vmwrite_bitmap));
5728 * nested_vmx_setup_ctls_msrs() sets up variables containing the values to be
5729 * returned for the various VMX controls MSRs when nested VMX is enabled.
5730 * The same values should also be used to verify that vmcs12 control fields are
5731 * valid during nested entry from L1 to L2.
5732 * Each of these control msrs has a low and high 32-bit half: A low bit is on
5733 * if the corresponding bit in the (32-bit) control field *must* be on, and a
5734 * bit in the high half is on if the corresponding bit in the control field
5735 * may be on. See also vmx_control_verify().
5737 void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps,
5741 * Note that as a general rule, the high half of the MSRs (bits in
5742 * the control fields which may be 1) should be initialized by the
5743 * intersection of the underlying hardware's MSR (i.e., features which
5744 * can be supported) and the list of features we want to expose -
5745 * because they are known to be properly supported in our code.
5746 * Also, usually, the low half of the MSRs (bits which must be 1) can
5747 * be set to 0, meaning that L1 may turn off any of these bits. The
5748 * reason is that if one of these bits is necessary, it will appear
5749 * in vmcs01 and prepare_vmcs02, when it bitwise-or's the control
5750 * fields of vmcs01 and vmcs02, will turn these bits off - and
5751 * nested_vmx_exit_reflected() will not pass related exits to L1.
5752 * These rules have exceptions below.
5755 /* pin-based controls */
5756 rdmsr(MSR_IA32_VMX_PINBASED_CTLS,
5757 msrs->pinbased_ctls_low,
5758 msrs->pinbased_ctls_high);
5759 msrs->pinbased_ctls_low |=
5760 PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
5761 msrs->pinbased_ctls_high &=
5762 PIN_BASED_EXT_INTR_MASK |
5763 PIN_BASED_NMI_EXITING |
5764 PIN_BASED_VIRTUAL_NMIS |
5765 (apicv ? PIN_BASED_POSTED_INTR : 0);
5766 msrs->pinbased_ctls_high |=
5767 PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR |
5768 PIN_BASED_VMX_PREEMPTION_TIMER;
5771 rdmsr(MSR_IA32_VMX_EXIT_CTLS,
5772 msrs->exit_ctls_low,
5773 msrs->exit_ctls_high);
5774 msrs->exit_ctls_low =
5775 VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR;
5777 msrs->exit_ctls_high &=
5778 #ifdef CONFIG_X86_64
5779 VM_EXIT_HOST_ADDR_SPACE_SIZE |
5781 VM_EXIT_LOAD_IA32_PAT | VM_EXIT_SAVE_IA32_PAT;
5782 msrs->exit_ctls_high |=
5783 VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR |
5784 VM_EXIT_LOAD_IA32_EFER | VM_EXIT_SAVE_IA32_EFER |
5785 VM_EXIT_SAVE_VMX_PREEMPTION_TIMER | VM_EXIT_ACK_INTR_ON_EXIT;
5787 /* We support free control of debug control saving. */
5788 msrs->exit_ctls_low &= ~VM_EXIT_SAVE_DEBUG_CONTROLS;
5790 /* entry controls */
5791 rdmsr(MSR_IA32_VMX_ENTRY_CTLS,
5792 msrs->entry_ctls_low,
5793 msrs->entry_ctls_high);
5794 msrs->entry_ctls_low =
5795 VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR;
5796 msrs->entry_ctls_high &=
5797 #ifdef CONFIG_X86_64
5798 VM_ENTRY_IA32E_MODE |
5800 VM_ENTRY_LOAD_IA32_PAT;
5801 msrs->entry_ctls_high |=
5802 (VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | VM_ENTRY_LOAD_IA32_EFER);
5804 /* We support free control of debug control loading. */
5805 msrs->entry_ctls_low &= ~VM_ENTRY_LOAD_DEBUG_CONTROLS;
5807 /* cpu-based controls */
5808 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS,
5809 msrs->procbased_ctls_low,
5810 msrs->procbased_ctls_high);
5811 msrs->procbased_ctls_low =
5812 CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
5813 msrs->procbased_ctls_high &=
5814 CPU_BASED_VIRTUAL_INTR_PENDING |
5815 CPU_BASED_VIRTUAL_NMI_PENDING | CPU_BASED_USE_TSC_OFFSETING |
5816 CPU_BASED_HLT_EXITING | CPU_BASED_INVLPG_EXITING |
5817 CPU_BASED_MWAIT_EXITING | CPU_BASED_CR3_LOAD_EXITING |
5818 CPU_BASED_CR3_STORE_EXITING |
5819 #ifdef CONFIG_X86_64
5820 CPU_BASED_CR8_LOAD_EXITING | CPU_BASED_CR8_STORE_EXITING |
5822 CPU_BASED_MOV_DR_EXITING | CPU_BASED_UNCOND_IO_EXITING |
5823 CPU_BASED_USE_IO_BITMAPS | CPU_BASED_MONITOR_TRAP_FLAG |
5824 CPU_BASED_MONITOR_EXITING | CPU_BASED_RDPMC_EXITING |
5825 CPU_BASED_RDTSC_EXITING | CPU_BASED_PAUSE_EXITING |
5826 CPU_BASED_TPR_SHADOW | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
5828 * We can allow some features even when not supported by the
5829 * hardware. For example, L1 can specify an MSR bitmap - and we
5830 * can use it to avoid exits to L1 - even when L0 runs L2
5831 * without MSR bitmaps.
5833 msrs->procbased_ctls_high |=
5834 CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR |
5835 CPU_BASED_USE_MSR_BITMAPS;
5837 /* We support free control of CR3 access interception. */
5838 msrs->procbased_ctls_low &=
5839 ~(CPU_BASED_CR3_LOAD_EXITING | CPU_BASED_CR3_STORE_EXITING);
5842 * secondary cpu-based controls. Do not include those that
5843 * depend on CPUID bits, they are added later by vmx_cpuid_update.
5845 if (msrs->procbased_ctls_high & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)
5846 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
5847 msrs->secondary_ctls_low,
5848 msrs->secondary_ctls_high);
5850 msrs->secondary_ctls_low = 0;
5851 msrs->secondary_ctls_high &=
5852 SECONDARY_EXEC_DESC |
5853 SECONDARY_EXEC_RDTSCP |
5854 SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE |
5855 SECONDARY_EXEC_WBINVD_EXITING |
5856 SECONDARY_EXEC_APIC_REGISTER_VIRT |
5857 SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY |
5858 SECONDARY_EXEC_RDRAND_EXITING |
5859 SECONDARY_EXEC_ENABLE_INVPCID |
5860 SECONDARY_EXEC_RDSEED_EXITING |
5861 SECONDARY_EXEC_XSAVES;
5864 * We can emulate "VMCS shadowing," even if the hardware
5865 * doesn't support it.
5867 msrs->secondary_ctls_high |=
5868 SECONDARY_EXEC_SHADOW_VMCS;
5871 /* nested EPT: emulate EPT also to L1 */
5872 msrs->secondary_ctls_high |=
5873 SECONDARY_EXEC_ENABLE_EPT;
5874 msrs->ept_caps = VMX_EPT_PAGE_WALK_4_BIT |
5875 VMX_EPTP_WB_BIT | VMX_EPT_INVEPT_BIT;
5876 if (cpu_has_vmx_ept_execute_only())
5878 VMX_EPT_EXECUTE_ONLY_BIT;
5879 msrs->ept_caps &= ept_caps;
5880 msrs->ept_caps |= VMX_EPT_EXTENT_GLOBAL_BIT |
5881 VMX_EPT_EXTENT_CONTEXT_BIT | VMX_EPT_2MB_PAGE_BIT |
5882 VMX_EPT_1GB_PAGE_BIT;
5883 if (enable_ept_ad_bits) {
5884 msrs->secondary_ctls_high |=
5885 SECONDARY_EXEC_ENABLE_PML;
5886 msrs->ept_caps |= VMX_EPT_AD_BIT;
5890 if (cpu_has_vmx_vmfunc()) {
5891 msrs->secondary_ctls_high |=
5892 SECONDARY_EXEC_ENABLE_VMFUNC;
5894 * Advertise EPTP switching unconditionally
5895 * since we emulate it
5898 msrs->vmfunc_controls =
5899 VMX_VMFUNC_EPTP_SWITCHING;
5903 * Old versions of KVM use the single-context version without
5904 * checking for support, so declare that it is supported even
5905 * though it is treated as global context. The alternative is
5906 * not failing the single-context invvpid, and it is worse.
5909 msrs->secondary_ctls_high |=
5910 SECONDARY_EXEC_ENABLE_VPID;
5911 msrs->vpid_caps = VMX_VPID_INVVPID_BIT |
5912 VMX_VPID_EXTENT_SUPPORTED_MASK;
5915 if (enable_unrestricted_guest)
5916 msrs->secondary_ctls_high |=
5917 SECONDARY_EXEC_UNRESTRICTED_GUEST;
5919 if (flexpriority_enabled)
5920 msrs->secondary_ctls_high |=
5921 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
5923 /* miscellaneous data */
5924 rdmsr(MSR_IA32_VMX_MISC,
5927 msrs->misc_low &= VMX_MISC_SAVE_EFER_LMA;
5929 MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS |
5930 VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE |
5931 VMX_MISC_ACTIVITY_HLT;
5932 msrs->misc_high = 0;
5935 * This MSR reports some information about VMX support. We
5936 * should return information about the VMX we emulate for the
5937 * guest, and the VMCS structure we give it - not about the
5938 * VMX support of the underlying hardware.
5942 VMX_BASIC_TRUE_CTLS |
5943 ((u64)VMCS12_SIZE << VMX_BASIC_VMCS_SIZE_SHIFT) |
5944 (VMX_BASIC_MEM_TYPE_WB << VMX_BASIC_MEM_TYPE_SHIFT);
5946 if (cpu_has_vmx_basic_inout())
5947 msrs->basic |= VMX_BASIC_INOUT;
5950 * These MSRs specify bits which the guest must keep fixed on
5951 * while L1 is in VMXON mode (in L1's root mode, or running an L2).
5952 * We picked the standard core2 setting.
5954 #define VMXON_CR0_ALWAYSON (X86_CR0_PE | X86_CR0_PG | X86_CR0_NE)
5955 #define VMXON_CR4_ALWAYSON X86_CR4_VMXE
5956 msrs->cr0_fixed0 = VMXON_CR0_ALWAYSON;
5957 msrs->cr4_fixed0 = VMXON_CR4_ALWAYSON;
5959 /* These MSRs specify bits which the guest must keep fixed off. */
5960 rdmsrl(MSR_IA32_VMX_CR0_FIXED1, msrs->cr0_fixed1);
5961 rdmsrl(MSR_IA32_VMX_CR4_FIXED1, msrs->cr4_fixed1);
5963 /* highest index: VMX_PREEMPTION_TIMER_VALUE */
5964 msrs->vmcs_enum = VMCS12_MAX_FIELD_INDEX << 1;
5967 void nested_vmx_hardware_unsetup(void)
5971 if (enable_shadow_vmcs) {
5972 for (i = 0; i < VMX_BITMAP_NR; i++)
5973 free_page((unsigned long)vmx_bitmap[i]);
5977 __init int nested_vmx_hardware_setup(int (*exit_handlers[])(struct kvm_vcpu *))
5981 if (!cpu_has_vmx_shadow_vmcs())
5982 enable_shadow_vmcs = 0;
5983 if (enable_shadow_vmcs) {
5984 for (i = 0; i < VMX_BITMAP_NR; i++) {
5986 * The vmx_bitmap is not tied to a VM and so should
5987 * not be charged to a memcg.
5989 vmx_bitmap[i] = (unsigned long *)
5990 __get_free_page(GFP_KERNEL);
5991 if (!vmx_bitmap[i]) {
5992 nested_vmx_hardware_unsetup();
5997 init_vmcs_shadow_fields();
6000 exit_handlers[EXIT_REASON_VMCLEAR] = handle_vmclear,
6001 exit_handlers[EXIT_REASON_VMLAUNCH] = handle_vmlaunch,
6002 exit_handlers[EXIT_REASON_VMPTRLD] = handle_vmptrld,
6003 exit_handlers[EXIT_REASON_VMPTRST] = handle_vmptrst,
6004 exit_handlers[EXIT_REASON_VMREAD] = handle_vmread,
6005 exit_handlers[EXIT_REASON_VMRESUME] = handle_vmresume,
6006 exit_handlers[EXIT_REASON_VMWRITE] = handle_vmwrite,
6007 exit_handlers[EXIT_REASON_VMOFF] = handle_vmoff,
6008 exit_handlers[EXIT_REASON_VMON] = handle_vmon,
6009 exit_handlers[EXIT_REASON_INVEPT] = handle_invept,
6010 exit_handlers[EXIT_REASON_INVVPID] = handle_invvpid,
6011 exit_handlers[EXIT_REASON_VMFUNC] = handle_vmfunc,
6013 kvm_x86_ops->check_nested_events = vmx_check_nested_events;
6014 kvm_x86_ops->get_nested_state = vmx_get_nested_state;
6015 kvm_x86_ops->set_nested_state = vmx_set_nested_state;
6016 kvm_x86_ops->get_vmcs12_pages = nested_get_vmcs12_pages,
6017 kvm_x86_ops->nested_enable_evmcs = nested_enable_evmcs;
6018 kvm_x86_ops->nested_get_evmcs_version = nested_get_evmcs_version;