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drm/xe/pmu: Get/put runtime pm on event init

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When the event is created, make sure runtime pm is taken and later put:
in order to read an event counter the GPU needs to remain accessible and
doing a get/put during perf's read is not possible it's holding a
raw_spinlock.

Suggested-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250124050411.2189060-4-lucas.demarchi@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
This commit is contained in:
Lucas De Marchi
2025-01-23 21:04:09 -08:00
parent ef7ce39386
commit 4ee64041bc
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/xe/xe_pmu.c
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@@ -7,6 +7,7 @@
#include <linux/device.h>
#include "xe_device.h"
#include "xe_pm.h"
#include "xe_pmu.h"
/**
@@ -68,6 +69,7 @@ static void xe_pmu_event_destroy(struct perf_event *event)
struct xe_device *xe = container_of(event->pmu, typeof(*xe), pmu.base);
drm_WARN_ON(&xe->drm, event->parent);
xe_pm_runtime_put(xe);
drm_dev_put(&xe->drm);
}
@@ -100,6 +102,7 @@ static int xe_pmu_event_init(struct perf_event *event)
if (!event->parent) {
drm_dev_get(&xe->drm);
xe_pm_runtime_get(xe);
event->destroy = xe_pmu_event_destroy;
}