Commit b6bb424b authored by Wei Huang's avatar Wei Huang Committed by Paolo Bonzini

KVM: x86/vPMU: Fix unnecessary signed extension for AMD PERFCTRn

According to AMD programmer's manual, AMD PERFCTRn is 64-bit MSR which,
unlike Intel perf counters, doesn't require signed extension. This
patch removes the unnecessary conversion in SVM vPMU code when PERFCTRn
is being updated.
Signed-off-by: default avatarWei Huang <wei@redhat.com>
Reviewed-by: default avatarAndrew Jones <drjones@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 603242a8
...@@ -133,8 +133,6 @@ static int amd_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) ...@@ -133,8 +133,6 @@ static int amd_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
/* MSR_K7_PERFCTRn */ /* MSR_K7_PERFCTRn */
pmc = get_gp_pmc(pmu, msr, MSR_K7_PERFCTR0); pmc = get_gp_pmc(pmu, msr, MSR_K7_PERFCTR0);
if (pmc) { if (pmc) {
if (!msr_info->host_initiated)
data = (s64)data;
pmc->counter += data - pmc_read_counter(pmc); pmc->counter += data - pmc_read_counter(pmc);
return 0; return 0;
} }
......
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