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authorWei Huang <wei@redhat.com>2015-08-07 15:53:30 -0400
committerPaolo Bonzini <pbonzini@redhat.com>2015-08-11 15:19:41 +0200
commitb6bb424b407ee0162fc492e6149847d0aa0034ff (patch)
tree566babd927b9e7783f76382b62ea6c800962f0f3 /arch/x86/kvm/pmu_amd.c
parent603242a88ac44771442b077e0c9cb4d3af2b796f (diff)
downloadlinux-b6bb424b407ee0162fc492e6149847d0aa0034ff.tar.bz2
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: Wei Huang <wei@redhat.com> Reviewed-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/pmu_amd.c')
-rw-r--r--arch/x86/kvm/pmu_amd.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/kvm/pmu_amd.c b/arch/x86/kvm/pmu_amd.c
index 886aa25a7131..39b91127ef07 100644
--- a/arch/x86/kvm/pmu_amd.c
+++ b/arch/x86/kvm/pmu_amd.c
@@ -133,8 +133,6 @@ static int amd_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
/* MSR_K7_PERFCTRn */
pmc = get_gp_pmc(pmu, msr, MSR_K7_PERFCTR0);
if (pmc) {
- if (!msr_info->host_initiated)
- data = (s64)data;
pmc->counter += data - pmc_read_counter(pmc);
return 0;
}