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KVM: x86 emulator: correctly mask pmc index bits in RDPMC instruction emulation

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Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gleb Natapov
2012-02-16 14:44:11 +02:00
committed by Avi Kivity
parent 565f3be217
commit 270c6c79f4
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/pmu.c
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@@ -413,7 +413,7 @@ int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data)
struct kvm_pmc *counters;
u64 ctr;
pmc &= (3u << 30) - 1;
pmc &= ~(3u << 30);
if (!fixed && pmc >= pmu->nr_arch_gp_counters)
return 1;
if (fixed && pmc >= pmu->nr_arch_fixed_counters)