diff options
Diffstat (limited to 'arch/x86/events')
| -rw-r--r-- | arch/x86/events/intel/core.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index bdf28d2f27e8..71860986dcb7 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -4083,6 +4083,17 @@ static void intel_pmu_cpu_starting(int cpu) if (x86_pmu.counter_freezing) enable_counter_freeze(); + /* Disable perf metrics if any added CPU doesn't support it. */ + if (x86_pmu.intel_cap.perf_metrics) { + union perf_capabilities perf_cap; + + rdmsrl(MSR_IA32_PERF_CAPABILITIES, perf_cap.capabilities); + if (!perf_cap.perf_metrics) { + x86_pmu.intel_cap.perf_metrics = 0; + x86_pmu.intel_ctrl &= ~(1ULL << GLOBAL_CTRL_EN_PERF_METRICS); + } + } + if (!cpuc->shared_regs) return; |