KVM: x86 emulator: correctly mask pmc index bits in RDPMC instruction emulation
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index 7aad544..3e48c1d 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -413,7 +413,7 @@
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)