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KVM: x86 emulator: correctly mask pmc index bits in RDPMC instruction emulation
author
Gleb Natapov
<gleb@redhat.com>
Thu, 16 Feb 2012 12:44:11 +0000
(14:44 +0200)
committer
Avi Kivity
<avi@redhat.com>
Thu, 8 Mar 2012 12:10:24 +0000
(14:10 +0200)
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
arch/x86/kvm/pmu.c
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diff --git
a/arch/x86/kvm/pmu.c
b/arch/x86/kvm/pmu.c
index 7aad5446f393def644e685c76dbfcd72e6b2711c..3e48c1d3edcdebea6578de7f90df8a60fd6fc5e5 100644
(file)
--- a/
arch/x86/kvm/pmu.c
+++ b/
arch/x86/kvm/pmu.c
@@
-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)
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