diff options
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx.c | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 13 |
3 files changed, 11 insertions, 5 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index b2c7263c93b6..82f1dc67782f 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -795,6 +795,7 @@ enum emulation_result { #define EMULTYPE_TRAP_UD (1 << 1) #define EMULTYPE_SKIP (1 << 2) #define EMULTYPE_RETRY (1 << 3) +#define EMULTYPE_NO_REEXECUTE (1 << 4) int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, int emulation_type, void *insn, int insn_len); diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 669b80378731..d2686771481f 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -5189,7 +5189,7 @@ static int handle_invalid_guest_state(struct kvm_vcpu *vcpu) if (test_bit(KVM_REQ_EVENT, &vcpu->requests)) return 1; - err = emulate_instruction(vcpu, 0); + err = emulate_instruction(vcpu, EMULTYPE_NO_REEXECUTE); if (err == EMULATE_DO_MMIO) { ret = 0; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index eb9927e0af11..999d1243a6ce 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4765,11 +4765,15 @@ static int handle_emulation_failure(struct kvm_vcpu *vcpu) } static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, - bool write_fault_to_shadow_pgtable) + bool write_fault_to_shadow_pgtable, + int emulation_type) { gpa_t gpa = cr2; pfn_t pfn; + if (emulation_type & EMULTYPE_NO_REEXECUTE) + return false; + if (!vcpu->arch.mmu.direct_map) { /* * Write permission should be allowed since only @@ -4912,8 +4916,8 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu, if (r != EMULATION_OK) { if (emulation_type & EMULTYPE_TRAP_UD) return EMULATE_FAIL; - if (reexecute_instruction(vcpu, cr2, - write_fault_to_spt)) + if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, + emulation_type)) return EMULATE_DONE; if (emulation_type & EMULTYPE_SKIP) return EMULATE_FAIL; @@ -4943,7 +4947,8 @@ restart: return EMULATE_DONE; if (r == EMULATION_FAILED) { - if (reexecute_instruction(vcpu, cr2, write_fault_to_spt)) + if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, + emulation_type)) return EMULATE_DONE; return handle_emulation_failure(vcpu); |