Commit 1c8147ea authored by Robin Murphy's avatar Robin Murphy Committed by Will Deacon
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perf/arm-cmn: Move IRQs when migrating context 



If we migrate the PMU context to another CPU, we need to remember to
retarget the IRQs as well.

Fixes: 0ba64770 ("perf: Add Arm CMN-600 PMU driver")
Signed-off-by: default avatarRobin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/e080640aea4ed8dfa870b8549dfb31221803eb6b.1611839564.git.robin.murphy@arm.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 79d7c3dc

drivers/perf/arm-cmn.c

+3 −1
Original line number Diff line number Diff line
@@ -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;

}