diff options
| author | Like Xu <likexu@tencent.com> | 2021-11-30 15:42:18 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-01-07 10:44:42 -0500 |
| commit | 6ed1298eb0bf6641b0a66c2c38369f5767a2575c (patch) | |
| tree | 8252add2eb57b52fa72f8a7ccabec5ee9e9f6741 /arch/x86/kvm/vmx/pmu_intel.c | |
| parent | 7c174f305cbee6bdba5018aae02b84369e7ab995 (diff) | |
| download | linux-6ed1298eb0bf6641b0a66c2c38369f5767a2575c.tar.bz2 | |
KVM: x86/pmu: Reuse pmc_perf_hw_id() and drop find_fixed_event()
Since we set the same semantic event value for the fixed counter in
pmc->eventsel, returning the perf_hw_id for the fixed counter via
find_fixed_event() can be painlessly replaced by pmc_perf_hw_id()
with the help of pmc_is_fixed() check.
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20211130074221.93635-4-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx/pmu_intel.c')
| -rw-r--r-- | arch/x86/kvm/vmx/pmu_intel.c | 19 |
1 files changed, 3 insertions, 16 deletions
diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c index 7b530de7ae23..5e0ac57d6d1b 100644 --- a/arch/x86/kvm/vmx/pmu_intel.c +++ b/arch/x86/kvm/vmx/pmu_intel.c @@ -76,9 +76,9 @@ static unsigned int intel_pmc_perf_hw_id(struct kvm_pmc *pmc) int i; for (i = 0; i < ARRAY_SIZE(intel_arch_events); i++) - if (intel_arch_events[i].eventsel == event_select - && intel_arch_events[i].unit_mask == unit_mask - && (pmu->available_event_types & (1 << i))) + if (intel_arch_events[i].eventsel == event_select && + intel_arch_events[i].unit_mask == unit_mask && + (pmc_is_fixed(pmc) || pmu->available_event_types & (1 << i))) break; if (i == ARRAY_SIZE(intel_arch_events)) @@ -87,18 +87,6 @@ static unsigned int intel_pmc_perf_hw_id(struct kvm_pmc *pmc) return intel_arch_events[i].event_type; } -static unsigned intel_find_fixed_event(int idx) -{ - u32 event; - size_t size = ARRAY_SIZE(fixed_pmc_events); - - if (WARN_ON_ONCE(idx >= size)) - return PERF_COUNT_HW_MAX; - - event = fixed_pmc_events[array_index_nospec(idx, size)]; - return intel_arch_events[event].event_type; -} - /* check if a PMC is enabled by comparing it with globl_ctrl bits. */ static bool intel_pmc_is_enabled(struct kvm_pmc *pmc) { @@ -722,7 +710,6 @@ static void intel_pmu_cleanup(struct kvm_vcpu *vcpu) struct kvm_pmu_ops intel_pmu_ops = { .pmc_perf_hw_id = intel_pmc_perf_hw_id, - .find_fixed_event = intel_find_fixed_event, .pmc_is_enabled = intel_pmc_is_enabled, .pmc_idx_to_pmc = intel_pmc_idx_to_pmc, .rdpmc_ecx_to_pmc = intel_rdpmc_ecx_to_pmc, |