[PATCH 2/2] perf/arm-cmn: Move IRQs when migrating context
flat view
STALE2078d
LANDED
From: Robin Murphy <robin.murphy@arm.com>
Date: 2021-01-28 13:14:22
Subsystem:
arm interconnect pmu drivers, arm pmu profiling and debugging, the rest · Maintainers:
Robin Murphy, Will Deacon, Mark Rutland, Linus Torvalds
Landed in mainline as 1c8147ea89c8 on 2021-01-28.
If we migrate the PMU context to another CPU, we need to remember to
retarget the IRQs as well.
Fixes: 0ba64770a2f2 ("perf: Add Arm CMN-600 PMU driver")
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/perf/arm-cmn.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
index f3071b5ddaae..46defb1dcf86 100644
--- a/drivers/perf/arm-cmn.c
+++ b/drivers/perf/arm-cmn.c@@ -1150,7 +1150,7 @@ static int arm_cmn_commit_txn(struct pmu *pmu) static int arm_cmn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) { struct arm_cmn *cmn; - unsigned int target; + unsigned int i, target; cmn = hlist_entry_safe(node, struct arm_cmn, cpuhp_node); if (cpu != cmn->cpu)
@@ -1161,6 +1161,8 @@ static int arm_cmn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) return 0; perf_pmu_migrate_context(&cmn->pmu, cpu, target); + for (i = 0; i < cmn->num_dtcs; i++) + irq_set_affinity_hint(cmn->dtc[i].irq, cpumask_of(target)); cmn->cpu = target; return 0; }
--
2.17.1
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