From: Jim Mattson jmattson@google.com
[ Upstream commit 710c476514313c74045c41c0571bb5178fd16e3d ]
AMD's event select is 3 nybbles, with the high nybble in bits 35:32 of a PerfEvtSeln MSR. Don't mask off the high nybble when configuring a RAW perf event.
Fixes: ca724305a2b0 ("KVM: x86/vPMU: Implement AMD vPMU code for KVM") Signed-off-by: Jim Mattson jmattson@google.com Message-Id: 20220203014813.2130559-2-jmattson@google.com Reviewed-by: David Dunn daviddunn@google.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 1bca8016ee8ae..b1fde6a548403 100644 --- a/arch/x86/kvm/pmu.c +++ b/arch/x86/kvm/pmu.c @@ -171,7 +171,7 @@ void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel) }
if (type == PERF_TYPE_RAW) - config = eventsel & X86_RAW_EVENT_MASK; + config = eventsel & AMD64_RAW_EVENT_MASK;
pmc_reprogram_counter(pmc, type, config, !(eventsel & ARCH_PERFMON_EVENTSEL_USR),