}
}
+static void intel_pmu_check_num_counters(int *num_counters,
+ int *num_counters_fixed,
+ u64 *intel_ctrl, u64 fixed_mask);
+
+static void update_pmu_cap(struct x86_hybrid_pmu *pmu)
+{
+ unsigned int sub_bitmaps = cpuid_eax(ARCH_PERFMON_EXT_LEAF);
+ unsigned int eax, ebx, ecx, edx;
+
+ if (sub_bitmaps & ARCH_PERFMON_NUM_COUNTER_LEAF_BIT) {
+ cpuid_count(ARCH_PERFMON_EXT_LEAF, ARCH_PERFMON_NUM_COUNTER_LEAF,
+ &eax, &ebx, &ecx, &edx);
+ pmu->num_counters = fls(eax);
+ pmu->num_counters_fixed = fls(ebx);
+ intel_pmu_check_num_counters(&pmu->num_counters, &pmu->num_counters_fixed,
+ &pmu->intel_ctrl, ebx);
+ }
+}
+
static bool init_hybrid_pmu(int cpu)
{
struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
if (!cpumask_empty(&pmu->supported_cpus))
goto end;
+ if (this_cpu_has(X86_FEATURE_ARCH_PERFMON_EXT))
+ update_pmu_cap(pmu);
+
if (!check_hw_exists(&pmu->pmu, pmu->num_counters, pmu->num_counters_fixed))
return false;
};
/*
+ * Intel "Architectural Performance Monitoring extension" CPUID
+ * detection/enumeration details:
+ */
+#define ARCH_PERFMON_EXT_LEAF 0x00000023
+#define ARCH_PERFMON_NUM_COUNTER_LEAF_BIT 0x1
+#define ARCH_PERFMON_NUM_COUNTER_LEAF 0x1
+
+/*
* Intel Architectural LBR CPUID detection/enumeration details:
*/
union cpuid28_eax {