drm/xe/xe_pmu: Validate gt in event supported

rtauro1895 · mattrope · commit b9329f51677e · 2025-07-02T16:09:11.000-07:00
Validate gt instead of checking gt_id is lesser than max gts per tile Signed-off-by: Riana Tauro <riana.tauro@intel.com> Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com> Reviewed-by: Matt Roper <matthew.d.roper@intel.com> Link: https://lore.kernel.org/r/20250630093741.2435281-1-riana.tauro@intel.com Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
diff --git a/drivers/gpu/drm/xe/xe_pmu.c b/drivers/gpu/drm/xe/xe_pmu.c
@@ -157,10 +157,13 @@ static bool event_gt_forcewake(struct perf_event *event)
 	return true;
 }
 
-static bool event_supported(struct xe_pmu *pmu, unsigned int gt,
+static bool event_supported(struct xe_pmu *pmu, unsigned int gt_id,
 			    unsigned int id)
 {
-	if (gt >= XE_MAX_GT_PER_TILE)
+	struct xe_device *xe = container_of(pmu, typeof(*xe), pmu);
+	struct xe_gt *gt = xe_device_get_gt(xe, gt_id);
+
+	if (!gt)
 		return false;
 
 	return id < sizeof(pmu->supported_events) * BITS_PER_BYTE &&

Original file line number	Diff line number	Diff line change
`@@ -157,10 +157,13 @@ static bool event_gt_forcewake(struct perf_event *event)`
`157`	`157`	`return true;`
`158`	`158`	`}`
`159`	`159`
`160`		`-static bool event_supported(struct xe_pmu *pmu, unsigned int gt,`
	`160`	`+static bool event_supported(struct xe_pmu *pmu, unsigned int gt_id,`
`161`	`161`	`unsigned int id)`
`162`	`162`	`{`
`163`		`- if (gt >= XE_MAX_GT_PER_TILE)`
	`163`	`+ struct xe_device xe = container_of(pmu, typeof(xe), pmu);`
	`164`	`+ struct xe_gt *gt = xe_device_get_gt(xe, gt_id);`
	`165`	`+`
	`166`	`+ if (!gt)`
`164`	`167`	`return false;`
`165`	`168`
`166`	`169`	`return id < sizeof(pmu->supported_events) * BITS_PER_BYTE &&`