diff mbox series

[v2,6/8] drivers/perf: hisi: Support PMUs with no interrupt

Message ID 20250321073846.23507-7-yangyicong@huawei.com (mailing list archive)
State New
Headers show
Series General updates and two new drivers for HiSilicon Uncore PMU | expand

Commit Message

Yicong Yang March 21, 2025, 7:38 a.m. UTC 
From: Yicong Yang <yangyicong@hisilicon.com>

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: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
---
 drivers/perf/hisilicon/hisi_uncore_pmu.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
index ef058b1dd509..a449651f79c9 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -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;
 	}
 
@@ -525,7 +527,8 @@  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 */
-	WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(cpu)));
+	if (hisi_pmu->irq > 0)
+		WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(cpu)));
 
 	return 0;
 }
@@ -560,7 +563,9 @@  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;
-	WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(target)));
+
+	if (hisi_pmu->irq > 0)
+		WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(target)));
 
 	return 0;
 }