| From | Michael Roth <> | Subject | [PATCH v10 01/50] KVM: SVM: INTERCEPT_RDTSCP is never intercepted anyway | Date | Mon, 16 Oct 2023 08:27:30 -0500 |
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From: Paolo Bonzini <pbonzini@redhat.com>
svm_recalc_instruction_intercepts() is always called at least once before the vCPU is started, so the setting or clearing of the RDTSCP intercept can be dropped from the TSC_AUX virtualization support.
Extracted from a patch by Tom Lendacky.
Cc: stable@vger.kernel.org Fixes: 296d5a17e793 ("KVM: SEV-ES: Use V_TSC_AUX if available instead of RDTSC/MSR_TSC_AUX intercepts") Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> (cherry picked from commit e8d93d5d93f85949e7299be289c6e7e1154b2f78) Signed-off-by: Michael Roth <michael.roth@amd.com> --- arch/x86/kvm/svm/sev.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index b9a0a939d59f..fa1fb81323b5 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -3027,11 +3027,8 @@ static void sev_es_init_vmcb(struct vcpu_svm *svm) if (boot_cpu_has(X86_FEATURE_V_TSC_AUX) && (guest_cpuid_has(&svm->vcpu, X86_FEATURE_RDTSCP) || - guest_cpuid_has(&svm->vcpu, X86_FEATURE_RDPID))) { + guest_cpuid_has(&svm->vcpu, X86_FEATURE_RDPID))) set_msr_interception(vcpu, svm->msrpm, MSR_TSC_AUX, 1, 1); - if (guest_cpuid_has(&svm->vcpu, X86_FEATURE_RDTSCP)) - svm_clr_intercept(svm, INTERCEPT_RDTSCP); - } } void sev_init_vmcb(struct vcpu_svm *svm) -- 2.25.1
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