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bus/arm-cci: Use cpu-hp's multi instance support instead custom list 

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: rt@linutronix.de
Cc: Olof Johansson <olof@lixom.net>
Link: http://lkml.kernel.org/r/1471024183-12666-5-git-send-email-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Sebastian Andrzej Siewior 2016-08-12 19:49:41 +02:00 committed by Thomas Gleixner
parent 6e103c0cfe
commit b230f0db91
1 changed files with 18 additions and 27 deletions
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45
drivers/bus/arm-cci.c
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@ -144,15 +144,12 @@ struct cci_pmu {
int num_cntrs;
atomic_t active_events;
struct mutex reserve_mutex;
struct list_head entry;
struct hlist_node node;
cpumask_t cpus;
};
#define to_cci_pmu(c) (container_of(c, struct cci_pmu, pmu))
static DEFINE_MUTEX(cci_pmu_mutex);
static LIST_HEAD(cci_pmu_list);
enum cci_models {
#ifdef CONFIG_ARM_CCI400_PMU
CCI400_R0,
@ -1506,25 +1503,21 @@ static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev)
return perf_pmu_register(&cci_pmu->pmu, name, -1);
}
static int cci_pmu_offline_cpu(unsigned int cpu)
static int cci_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
{
struct cci_pmu *cci_pmu;
struct cci_pmu *cci_pmu = hlist_entry_safe(node, struct cci_pmu, node);
unsigned int target;
mutex_lock(&cci_pmu_mutex);
list_for_each_entry(cci_pmu, &cci_pmu_list, entry) {
if (!cpumask_test_and_clear_cpu(cpu, &cci_pmu->cpus))
continue;
target = cpumask_any_but(cpu_online_mask, cpu);
if (target >= nr_cpu_ids)
continue;
/*
* TODO: migrate context once core races on event->ctx have
* been fixed.
*/
cpumask_set_cpu(target, &cci_pmu->cpus);
}
mutex_unlock(&cci_pmu_mutex);
if (!cpumask_test_and_clear_cpu(cpu, &cci_pmu->cpus))
return 0;
target = cpumask_any_but(cpu_online_mask, cpu);
if (target >= nr_cpu_ids)
return 0;
/*
* TODO: migrate context once core races on event->ctx have
* been fixed.
*/
cpumask_set_cpu(target, &cci_pmu->cpus);
return 0;
}
@ -1768,10 +1761,8 @@ static int cci_pmu_probe(struct platform_device *pdev)
if (ret)
return ret;
mutex_lock(&cci_pmu_mutex);
list_add(&cci_pmu->entry, &cci_pmu_list);
mutex_unlock(&cci_pmu_mutex);
cpuhp_state_add_instance_nocalls(CPUHP_AP_PERF_ARM_CCI_ONLINE,
&cci_pmu->node);
pr_info("ARM %s PMU driver probed", cci_pmu->model->name);
return 0;
}
@ -1804,9 +1795,9 @@ static int __init cci_platform_init(void)
{
int ret;
ret = cpuhp_setup_state_nocalls(CPUHP_AP_PERF_ARM_CCI_ONLINE,
"AP_PERF_ARM_CCI_ONLINE", NULL,
cci_pmu_offline_cpu);
ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_CCI_ONLINE,
"AP_PERF_ARM_CCI_ONLINE", NULL,
cci_pmu_offline_cpu);
if (ret)
return ret;