diff options
| -rw-r--r-- | arch/x86/include/asm/kvm_emulate.h | 5 | ||||
| -rw-r--r-- | arch/x86/kvm/emulate.c | 6 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 10 |
3 files changed, 16 insertions, 5 deletions
diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index 57a9d94fe160..7410879a41f7 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h @@ -262,6 +262,9 @@ enum x86emul_mode { X86EMUL_MODE_PROT64, /* 64-bit (long) mode. */ }; +/* These match some of the HF_* flags defined in kvm_host.h */ +#define X86EMUL_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */ + struct x86_emulate_ctxt { const struct x86_emulate_ops *ops; @@ -273,8 +276,8 @@ struct x86_emulate_ctxt { /* interruptibility state, as a result of execution of STI or MOV SS */ int interruptibility; + int emul_flags; - bool guest_mode; /* guest running a nested guest */ bool perm_ok; /* do not check permissions if true */ bool ud; /* inject an #UD if host doesn't support insn */ diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 9b655d113fc6..a1c6c25552e9 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -4895,7 +4895,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt) fetch_possible_mmx_operand(ctxt, &ctxt->dst); } - if (unlikely(ctxt->guest_mode) && (ctxt->d & Intercept)) { + if (unlikely(ctxt->emul_flags & X86EMUL_GUEST_MASK) && ctxt->intercept) { rc = emulator_check_intercept(ctxt, ctxt->intercept, X86_ICPT_PRE_EXCEPT); if (rc != X86EMUL_CONTINUE) @@ -4924,7 +4924,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt) goto done; } - if (unlikely(ctxt->guest_mode) && (ctxt->d & Intercept)) { + if (unlikely(ctxt->emul_flags & X86EMUL_GUEST_MASK) && (ctxt->d & Intercept)) { rc = emulator_check_intercept(ctxt, ctxt->intercept, X86_ICPT_POST_EXCEPT); if (rc != X86EMUL_CONTINUE) @@ -4978,7 +4978,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt) special_insn: - if (unlikely(ctxt->guest_mode) && (ctxt->d & Intercept)) { + if (unlikely(ctxt->emul_flags & X86EMUL_GUEST_MASK) && (ctxt->d & Intercept)) { rc = emulator_check_intercept(ctxt, ctxt->intercept, X86_ICPT_POST_MEMACCESS); if (rc != X86EMUL_CONTINUE) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 3632928191f3..7aec25f2f45c 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5240,7 +5240,8 @@ static void init_emulate_ctxt(struct kvm_vcpu *vcpu) (cs_l && is_long_mode(vcpu)) ? X86EMUL_MODE_PROT64 : cs_db ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; - ctxt->guest_mode = is_guest_mode(vcpu); + BUILD_BUG_ON(HF_GUEST_MASK != X86EMUL_GUEST_MASK); + ctxt->emul_flags = vcpu->arch.hflags; init_decode_cache(ctxt); vcpu->arch.emulate_regs_need_sync_from_vcpu = false; @@ -5409,6 +5410,11 @@ static bool retry_instruction(struct x86_emulate_ctxt *ctxt, static int complete_emulated_mmio(struct kvm_vcpu *vcpu); static int complete_emulated_pio(struct kvm_vcpu *vcpu); +void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags) +{ + vcpu->arch.hflags = emul_flags; +} + static int kvm_vcpu_check_hw_bp(unsigned long addr, u32 type, u32 dr7, unsigned long *db) { @@ -5608,6 +5614,8 @@ restart: unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); toggle_interruptibility(vcpu, ctxt->interruptibility); vcpu->arch.emulate_regs_need_sync_to_vcpu = false; + if (vcpu->arch.hflags != ctxt->emul_flags) + kvm_set_hflags(vcpu, ctxt->emul_flags); kvm_rip_write(vcpu, ctxt->eip); if (r == EMULATE_DONE) kvm_vcpu_check_singlestep(vcpu, rflags, &r); |