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    Subject[PATCH v10 01/50] KVM: SVM: INTERCEPT_RDTSCP is never intercepted anyway
    Date
    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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