[PATCH 05/11] KVM: x86 emulator: correctly mask pmc index bits in RDPMC instruction emulation
From: Avi Kivity <hidden>
Date: 2012-05-09 13:10:41
Also in:
kvm
Subsystem:
kernel virtual machine for x86 (kvm/x86), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Sean Christopherson, Paolo Bonzini, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
From: Gleb Natapov <redacted> Signed-off-by: Gleb Natapov <redacted> Signed-off-by: Avi Kivity <redacted> (cherry picked from commit 270c6c79f4e15e599f47174ecedad932463af7a2) --- arch/x86/kvm/pmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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 @@ 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)
--
1.7.10.1