From: Robin Murphy <robin.murphy@arm.com>
To: will@kernel.org, mark.rutland@arm.com
Cc: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] perf/arm-cmn: Move IRQs when migrating context
Date: Thu, 28 Jan 2021 13:12:44 +0000 [thread overview]
Message-ID: <e080640aea4ed8dfa870b8549dfb31221803eb6b.1611839564.git.robin.murphy@arm.com> (raw)
In-Reply-To: <649a2281233f193d59240b13ed91b57337c77b32.1611839564.git.robin.murphy@arm.com>
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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next prev parent reply other threads:[~2021-01-28 13:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-28 13:12 [PATCH 1/2] perf/arm-cmn: Fix PMU instance naming Robin Murphy
2021-01-28 13:12 ` Robin Murphy [this message]
2021-01-28 20:14 ` Will Deacon
2021-01-29 0:14 ` Robin Murphy
2021-01-28 21:07 ` Will Deacon
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