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drivers/perf: hisi: Support PMUs with no interrupt

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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>
Link: https://lore.kernel.org/r/20250619125557.57372-7-yangyicong@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Yicong Yang 2025-06-19 20:55:55 +08:00 committed by Will Deacon
parent 35f5b36e8c
commit e480898e76
1 changed files with 8 additions and 3 deletions
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7
drivers/perf/hisilicon/hisi_uncore_pmu.c
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@ -510,7 +510,9 @@ int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node)
return 0; return 0;
hisi_pmu->on_cpu = cpumask_local_spread(0, dev_to_node(hisi_pmu->dev)); 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; return 0;
} }
@ -525,6 +527,7 @@ int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node)
hisi_pmu->on_cpu = cpu; hisi_pmu->on_cpu = cpu;
/* Overflow interrupt also should use the same 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))); WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(cpu)));
return 0; 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); perf_pmu_migrate_context(&hisi_pmu->pmu, cpu, target);
/* Use this CPU for event counting */ /* Use this CPU for event counting */
hisi_pmu->on_cpu = target; hisi_pmu->on_cpu = target;
if (hisi_pmu->irq > 0)
WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(target))); WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(target)));
return 0; return 0;