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perf/arm-cmn: Move IRQs when migrating context

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[ Upstream commit 1c8147ea89c883d1f4e20f1b1d9c879291430102 ]

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

Fixes: 0ba64770a2 ("perf: Add Arm CMN-600 PMU driver")
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/e080640aea4ed8dfa870b8549dfb31221803eb6b.1611839564.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Robin Murphy 2021-01-28 13:12:44 +00:00 committed by Greg Kroah-Hartman
parent 1ea83d4891
commit 86399c1911
1 changed files with 3 additions and 1 deletions
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4
drivers/perf/arm-cmn.c
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@ -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;
}