From: Jim Mattson jmattson@google.com
[ Upstream commit 95b065bf5c431c06c68056a03a5853b660640ecc ]
The third nybble of AMD's event select overlaps with Intel's IN_TX and IN_TXCP bits. Therefore, we can't use AMD64_RAW_EVENT_MASK on Intel platforms that support TSX.
Declare a raw_event_mask in the kvm_pmu structure, initialize it in the vendor-specific pmu_refresh() functions, and use that mask for PERF_TYPE_RAW configurations in reprogram_gp_counter().
Fixes: 710c47651431 ("KVM: x86/pmu: Use AMD64_RAW_EVENT_MASK for PERF_TYPE_RAW") Signed-off-by: Jim Mattson jmattson@google.com Message-Id: 20220308012452.3468611-1-jmattson@google.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/pmu.c | 3 ++- arch/x86/kvm/svm/pmu.c | 1 + arch/x86/kvm/vmx/pmu_intel.c | 1 + 4 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index ec9830d2aabf..17b4e1808b8e 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -509,6 +509,7 @@ struct kvm_pmu { u64 global_ctrl_mask; u64 global_ovf_ctrl_mask; u64 reserved_bits; + u64 raw_event_mask; u8 version; struct kvm_pmc gp_counters[INTEL_PMC_MAX_GENERIC]; struct kvm_pmc fixed_counters[INTEL_PMC_MAX_FIXED]; diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c index b1a02993782b..902b6d700215 100644 --- a/arch/x86/kvm/pmu.c +++ b/arch/x86/kvm/pmu.c @@ -185,6 +185,7 @@ void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel) u32 type = PERF_TYPE_RAW; struct kvm *kvm = pmc->vcpu->kvm; struct kvm_pmu_event_filter *filter; + struct kvm_pmu *pmu = vcpu_to_pmu(pmc->vcpu); bool allow_event = true;
if (eventsel & ARCH_PERFMON_EVENTSEL_PIN_CONTROL) @@ -221,7 +222,7 @@ void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel) }
if (type == PERF_TYPE_RAW) - config = eventsel & AMD64_RAW_EVENT_MASK; + config = eventsel & pmu->raw_event_mask;
if (pmc->current_config == eventsel && pmc_resume_counter(pmc)) return; diff --git a/arch/x86/kvm/svm/pmu.c b/arch/x86/kvm/svm/pmu.c index 5aa45f13b16d..7cc664b4472a 100644 --- a/arch/x86/kvm/svm/pmu.c +++ b/arch/x86/kvm/svm/pmu.c @@ -284,6 +284,7 @@ static void amd_pmu_refresh(struct kvm_vcpu *vcpu)
pmu->counter_bitmask[KVM_PMC_GP] = ((u64)1 << 48) - 1; pmu->reserved_bits = 0xfffffff000280000ull; + pmu->raw_event_mask = AMD64_RAW_EVENT_MASK; pmu->version = 1; /* not applicable to AMD; but clean them to prevent any fall out */ pmu->counter_bitmask[KVM_PMC_FIXED] = 0; diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c index 466d18fc0c5d..8ba12294a7c5 100644 --- a/arch/x86/kvm/vmx/pmu_intel.c +++ b/arch/x86/kvm/vmx/pmu_intel.c @@ -485,6 +485,7 @@ static void intel_pmu_refresh(struct kvm_vcpu *vcpu) pmu->counter_bitmask[KVM_PMC_FIXED] = 0; pmu->version = 0; pmu->reserved_bits = 0xffffffff00200000ull; + pmu->raw_event_mask = X86_RAW_EVENT_MASK;
entry = kvm_find_cpuid_entry(vcpu, 0xa, 0); if (!entry || !enable_pmu)