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| author | Paolo Bonzini <pbonzini@redhat.com> | 2023-09-22 17:06:34 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-06 14:57:00 +0200 |
| commit | e86a3a6226339367b24afacc8b0d530a1e7b2070 (patch) | |
| tree | 30fa4f9d2c5c917d6ca21c400b33718f059ed0eb | |
| parent | 6ce2f297a7168274547d0b5aea6c7c16268b8a96 (diff) | |
| download | linux-stable-e86a3a6226339367b24afacc8b0d530a1e7b2070.tar.gz linux-stable-e86a3a6226339367b24afacc8b0d530a1e7b2070.tar.bz2 linux-stable-e86a3a6226339367b24afacc8b0d530a1e7b2070.zip | |
KVM: SVM: INTERCEPT_RDTSCP is never intercepted anyway
commit e8d93d5d93f85949e7299be289c6e7e1154b2f78 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: 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/kvm/svm/sev.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index d08d5e085649..e0d14f964fe7 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -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) |