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Merge "perf: Add exclude_idle support for armv7 PMU"

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This commit is contained in:
qctecmdr 2021-02-06 05:10:47 -08:00 • committed by Gerrit - the friendly Code Review server
commit 238b1e37b4
1 changed files with 68 additions and 13 deletions
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81
arch/arm/kernel/perf_event_v7.c
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@ -1072,8 +1072,6 @@ static int armv7pmu_set_event_filter(struct hw_perf_event *event,
{
unsigned long config_base = 0;
if (attr->exclude_idle)
return -EPERM;
if (attr->exclude_user)
config_base |= ARMV7_EXCLUDE_USER;
if (attr->exclude_kernel)
@ -1190,11 +1188,68 @@ static void armv7_read_num_pmnc_events(void *info)
*nb_cnt += 1;
}
static int armv7_probe_num_events(struct arm_pmu *arm_pmu)
static void armv7_pmu_idle_update(struct arm_pmu *cpu_pmu)
{
return smp_call_function_any(&arm_pmu->supported_cpus,
struct pmu_hw_events *hw_events;
struct perf_event *event;
int idx;
if (!cpu_pmu)
return;
hw_events = this_cpu_ptr(cpu_pmu->hw_events);
if (!hw_events)
return;
for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
event = hw_events->events[idx];
if (!event || !event->attr.exclude_idle ||
event->state != PERF_EVENT_STATE_ACTIVE)
continue;
cpu_pmu->pmu.read(event);
}
}
struct armv7_pmu_idle_nb {
struct arm_pmu *cpu_pmu;
struct notifier_block perf_cpu_idle_nb;
};
static int armv7_pmu_idle_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct armv7_pmu_idle_nb *pmu_idle_nb = container_of(nb,
struct armv7_pmu_idle_nb, perf_cpu_idle_nb);
if (action == IDLE_START)
armv7_pmu_idle_update(pmu_idle_nb->cpu_pmu);
return NOTIFY_OK;
}
static int armv7_probe_pmu(struct arm_pmu *arm_pmu)
{
int ret;
struct armv7_pmu_idle_nb *pmu_idle_nb;
pmu_idle_nb = devm_kzalloc(&arm_pmu->plat_device->dev,
sizeof(*pmu_idle_nb), GFP_KERNEL);
if (!pmu_idle_nb)
return -ENOMEM;
ret = smp_call_function_any(&arm_pmu->supported_cpus,
armv7_read_num_pmnc_events,
&arm_pmu->num_events, 1);
if (ret)
return ret;
pmu_idle_nb->cpu_pmu = arm_pmu;
pmu_idle_nb->perf_cpu_idle_nb.notifier_call = armv7_pmu_idle_notifier;
idle_notifier_register(&pmu_idle_nb->perf_cpu_idle_nb);
return 0;
}
static int armv7_a8_pmu_init(struct arm_pmu *cpu_pmu)
@ -1206,7 +1261,7 @@ static int armv7_a8_pmu_init(struct arm_pmu *cpu_pmu)
&armv7_pmuv1_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv7_pmu_format_attr_group;
return armv7_probe_num_events(cpu_pmu);
return armv7_probe_pmu(cpu_pmu);
}
static int armv7_a9_pmu_init(struct arm_pmu *cpu_pmu)
@ -1218,7 +1273,7 @@ static int armv7_a9_pmu_init(struct arm_pmu *cpu_pmu)
&armv7_pmuv1_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv7_pmu_format_attr_group;
return armv7_probe_num_events(cpu_pmu);
return armv7_probe_pmu(cpu_pmu);
}
static int armv7_a5_pmu_init(struct arm_pmu *cpu_pmu)
@ -1230,7 +1285,7 @@ static int armv7_a5_pmu_init(struct arm_pmu *cpu_pmu)
&armv7_pmuv1_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv7_pmu_format_attr_group;
return armv7_probe_num_events(cpu_pmu);
return armv7_probe_pmu(cpu_pmu);
}
static int armv7_a15_pmu_init(struct arm_pmu *cpu_pmu)
@ -1243,7 +1298,7 @@ static int armv7_a15_pmu_init(struct arm_pmu *cpu_pmu)
&armv7_pmuv2_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv7_pmu_format_attr_group;
return armv7_probe_num_events(cpu_pmu);
return armv7_probe_pmu(cpu_pmu);
}
static int armv7_a7_pmu_init(struct arm_pmu *cpu_pmu)
@ -1256,7 +1311,7 @@ static int armv7_a7_pmu_init(struct arm_pmu *cpu_pmu)
&armv7_pmuv2_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv7_pmu_format_attr_group;
return armv7_probe_num_events(cpu_pmu);
return armv7_probe_pmu(cpu_pmu);
}
static int armv7_a12_pmu_init(struct arm_pmu *cpu_pmu)
@ -1269,7 +1324,7 @@ static int armv7_a12_pmu_init(struct arm_pmu *cpu_pmu)
&armv7_pmuv2_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv7_pmu_format_attr_group;
return armv7_probe_num_events(cpu_pmu);
return armv7_probe_pmu(cpu_pmu);
}
static int armv7_a17_pmu_init(struct arm_pmu *cpu_pmu)
@ -1667,7 +1722,7 @@ static int krait_pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->disable = krait_pmu_disable_event;
cpu_pmu->get_event_idx = krait_pmu_get_event_idx;
cpu_pmu->clear_event_idx = krait_pmu_clear_event_idx;
return armv7_probe_num_events(cpu_pmu);
return armv7_probe_pmu(cpu_pmu);
}
/*
@ -1991,7 +2046,7 @@ static int scorpion_pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->disable = scorpion_pmu_disable_event;
cpu_pmu->get_event_idx = scorpion_pmu_get_event_idx;
cpu_pmu->clear_event_idx = scorpion_pmu_clear_event_idx;
return armv7_probe_num_events(cpu_pmu);
return armv7_probe_pmu(cpu_pmu);
}
static int scorpion_mp_pmu_init(struct arm_pmu *cpu_pmu)
@ -2004,7 +2059,7 @@ static int scorpion_mp_pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->disable = scorpion_pmu_disable_event;
cpu_pmu->get_event_idx = scorpion_pmu_get_event_idx;
cpu_pmu->clear_event_idx = scorpion_pmu_clear_event_idx;
return armv7_probe_num_events(cpu_pmu);
return armv7_probe_pmu(cpu_pmu);
}
static const struct of_device_id armv7_pmu_of_device_ids[] = {