Messages in this thread Patch in this message | | | From | Robin Murphy <> | Subject | [PATCH] perf/arm-cmn: Set PMU device parent | Date | Tue, 9 Apr 2024 18:15:17 +0100 |
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Now that perf supports giving the PMU device a parent, we can use our platform device to make the relationship between CMN instances and PMU IDs trivially discoverable, from either nominal direction:
root@crazy-taxi:~# ls /sys/devices/platform/ARMHC600:00 | grep cmn arm_cmn_0 root@crazy-taxi:~# realpath /sys/bus/event_source/devices/arm_cmn_0/.. /sys/devices/platform/ARMHC600:00
Signed-off-by: Robin Murphy <robin.murphy@arm.com> --- drivers/perf/arm-cmn.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index 7ef9c7e4836b..b2c607cf3ad7 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -2482,6 +2482,7 @@ static int arm_cmn_probe(struct platform_device *pdev) cmn->cpu = cpumask_local_spread(0, dev_to_node(cmn->dev)); cmn->pmu = (struct pmu) { .module = THIS_MODULE, + .parent = cmn->dev, .attr_groups = arm_cmn_attr_groups, .capabilities = PERF_PMU_CAP_NO_EXCLUDE, .task_ctx_nr = perf_invalid_context, -- 2.39.2.101.g768bb238c484.dirty
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