Commit 4ee64041 authored Jan 23, 2025 by Lucas De Marchi

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



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>

parent ef7ce393

drivers/gpu/drm/xe/xe_pmu.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}