diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index be8c43049f4d..9c6ec5e88141 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -1356,11 +1356,14 @@ static void init_vmcb(struct kvm_vcpu *vcpu) svm_recalc_instruction_intercepts(vcpu, svm); /* - * If the host supports V_SPEC_CTRL then disable the interception - * of MSR_IA32_SPEC_CTRL. + * If the CPU virtualizes MSR_IA32_SPEC_CTRL, i.e. KVM doesn't need to + * manually context switch the MSR, immediately configure interception + * of SPEC_CTRL, without waiting for the guest to access the MSR. */ if (boot_cpu_has(X86_FEATURE_V_SPEC_CTRL)) - set_msr_interception(vcpu, svm->msrpm, MSR_IA32_SPEC_CTRL, 1, 1); + set_msr_interception(vcpu, svm->msrpm, MSR_IA32_SPEC_CTRL, + guest_has_spec_ctrl_msr(vcpu), + guest_has_spec_ctrl_msr(vcpu)); if (kvm_vcpu_apicv_active(vcpu)) avic_init_vmcb(svm, vmcb);