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KVM: SVM: INTERCEPT_RDTSCP is never intercepted anyway

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commit e8d93d5d93 upstream.

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: 296d5a17e7 ("KVM: SEV-ES: Use V_TSC_AUX if available instead of RDTSC/MSR_TSC_AUX intercepts")
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paolo Bonzini 2023-09-22 17:06:34 -04:00 committed by Greg Kroah-Hartman
parent 6ce2f297a7
commit e86a3a6226
1 changed files with 1 additions and 4 deletions
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5
arch/x86/kvm/svm/sev.c
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@ -2990,11 +2990,8 @@ 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)