Commit e480898e authored by Yicong Yang's avatar Yicong Yang Committed by Will Deacon
Browse files

drivers/perf: hisi: Support PMUs with no interrupt 



We'll have PMUs don't have an interrupt to indicate the counter
overflow, but the Uncore PMU core assume all the PMUs have
interrupt. So handle this case in the core. The existing PMUs
won't be affected.

Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarYicong Yang <yangyicong@hisilicon.com>
Link: https://lore.kernel.org/r/20250619125557.57372-7-yangyicong@huawei.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 35f5b36e

drivers/perf/hisilicon/hisi_uncore_pmu.c

+8 −3
Original line number Diff line number Diff line
@@ -510,7 +510,9 @@ int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node) 
			return 0;



		hisi_pmu->on_cpu = cpumask_local_spread(0, dev_to_node(hisi_pmu->dev));

		WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(hisi_pmu->on_cpu)));

		if (hisi_pmu->irq > 0)

			WARN_ON(irq_set_affinity(hisi_pmu->irq,

						 cpumask_of(hisi_pmu->on_cpu)));

		return 0;

	}
@@ -525,6 +527,7 @@ int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node) 
	hisi_pmu->on_cpu = cpu;



	/* Overflow interrupt also should use the same CPU */

	if (hisi_pmu->irq > 0)

		WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(cpu)));



	return 0;
@@ -560,6 +563,8 @@ int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) 
	perf_pmu_migrate_context(&hisi_pmu->pmu, cpu, target);

	/* Use this CPU for event counting */

	hisi_pmu->on_cpu = target;



	if (hisi_pmu->irq > 0)

		WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(target)));



	return 0;