Merge v6.12.43linux-rolling-lts

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

4 files changed, 26 insertions, 13 deletions

diff --git a/drivers/gpu/drm/xe/xe_guc_exec_queue_types.h b/drivers/gpu/drm/xe/xe_guc_exec_queue_types.h
index 4c39f01e4f52..a3f421e2adc0 100644
--- a/drivers/gpu/drm/xe/xe_guc_exec_queue_types.h
+++ b/drivers/gpu/drm/xe/xe_guc_exec_queue_types.h
@@ -20,6 +20,8 @@ struct xe_exec_queue;
 struct xe_guc_exec_queue {
 	/** @q: Backpointer to parent xe_exec_queue */
 	struct xe_exec_queue *q;
+	/** @rcu: For safe freeing of exported dma fences */
+	struct rcu_head rcu;
 	/** @sched: GPU scheduler for this xe_exec_queue */
 	struct xe_gpu_scheduler sched;
 	/** @entity: Scheduler entity for this xe_exec_queue */
diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
index 0e17820a35e2..cf6946424fc3 100644
--- a/drivers/gpu/drm/xe/xe_guc_submit.c
+++ b/drivers/gpu/drm/xe/xe_guc_submit.c
@@ -1241,7 +1241,11 @@ static void __guc_exec_queue_fini_async(struct work_struct *w)
 	xe_sched_entity_fini(&ge->entity);
 	xe_sched_fini(&ge->sched);
 
-	kfree(ge);
+	/*
+	 * RCU free due sched being exported via DRM scheduler fences
+	 * (timeline name).
+	 */
+	kfree_rcu(ge, rcu);
 	xe_exec_queue_fini(q);
 	xe_pm_runtime_put(guc_to_xe(guc));
 }
@@ -1427,6 +1431,7 @@ static int guc_exec_queue_init(struct xe_exec_queue *q)
 
 	q->guc = ge;
 	ge->q = q;
+	init_rcu_head(&ge->rcu);
 	init_waitqueue_head(&ge->suspend_wait);
 
 	for (i = 0; i < MAX_STATIC_MSG_TYPE; ++i)
diff --git a/drivers/gpu/drm/xe/xe_hw_fence.c b/drivers/gpu/drm/xe/xe_hw_fence.c
index 0b4f12be3692..6e2221b60688 100644
--- a/drivers/gpu/drm/xe/xe_hw_fence.c
+++ b/drivers/gpu/drm/xe/xe_hw_fence.c
@@ -100,6 +100,9 @@ void xe_hw_fence_irq_finish(struct xe_hw_fence_irq *irq)
 		spin_unlock_irqrestore(&irq->lock, flags);
 		dma_fence_end_signalling(tmp);
 	}
+
+	/* Safe release of the irq->lock used in dma_fence_init. */
+	synchronize_rcu();
 }
 
 void xe_hw_fence_irq_run(struct xe_hw_fence_irq *irq)
diff --git a/drivers/gpu/drm/xe/xe_query.c b/drivers/gpu/drm/xe/xe_query.c
index 6fec5d1a1eb4..6e7c940d7e22 100644
--- a/drivers/gpu/drm/xe/xe_query.c
+++ b/drivers/gpu/drm/xe/xe_query.c
@@ -366,6 +366,7 @@ static int query_gt_list(struct xe_device *xe, struct drm_xe_device_query *query
 	struct drm_xe_query_gt_list __user *query_ptr =
 		u64_to_user_ptr(query->data);
 	struct drm_xe_query_gt_list *gt_list;
+	int iter = 0;
 	u8 id;
 
 	if (query->size == 0) {
@@ -383,12 +384,12 @@ static int query_gt_list(struct xe_device *xe, struct drm_xe_device_query *query
 
 	for_each_gt(gt, xe, id) {
 		if (xe_gt_is_media_type(gt))
-			gt_list->gt_list[id].type = DRM_XE_QUERY_GT_TYPE_MEDIA;
+			gt_list->gt_list[iter].type = DRM_XE_QUERY_GT_TYPE_MEDIA;
 		else
-			gt_list->gt_list[id].type = DRM_XE_QUERY_GT_TYPE_MAIN;
-		gt_list->gt_list[id].tile_id = gt_to_tile(gt)->id;
-		gt_list->gt_list[id].gt_id = gt->info.id;
-		gt_list->gt_list[id].reference_clock = gt->info.reference_clock;
+			gt_list->gt_list[iter].type = DRM_XE_QUERY_GT_TYPE_MAIN;
+		gt_list->gt_list[iter].tile_id = gt_to_tile(gt)->id;
+		gt_list->gt_list[iter].gt_id = gt->info.id;
+		gt_list->gt_list[iter].reference_clock = gt->info.reference_clock;
 		/*
 		 * The mem_regions indexes in the mask below need to
 		 * directly identify the struct
@@ -404,19 +405,21 @@ static int query_gt_list(struct xe_device *xe, struct drm_xe_device_query *query
 		 * assumption.
 		 */
 		if (!IS_DGFX(xe))
-			gt_list->gt_list[id].near_mem_regions = 0x1;
+			gt_list->gt_list[iter].near_mem_regions = 0x1;
 		else
-			gt_list->gt_list[id].near_mem_regions =
+			gt_list->gt_list[iter].near_mem_regions =
 				BIT(gt_to_tile(gt)->id) << 1;
-		gt_list->gt_list[id].far_mem_regions = xe->info.mem_region_mask ^
-			gt_list->gt_list[id].near_mem_regions;
+		gt_list->gt_list[iter].far_mem_regions = xe->info.mem_region_mask ^
+			gt_list->gt_list[iter].near_mem_regions;
 
-		gt_list->gt_list[id].ip_ver_major =
+		gt_list->gt_list[iter].ip_ver_major =
 			REG_FIELD_GET(GMD_ID_ARCH_MASK, gt->info.gmdid);
-		gt_list->gt_list[id].ip_ver_minor =
+		gt_list->gt_list[iter].ip_ver_minor =
 			REG_FIELD_GET(GMD_ID_RELEASE_MASK, gt->info.gmdid);
-		gt_list->gt_list[id].ip_ver_rev =
+		gt_list->gt_list[iter].ip_ver_rev =
 			REG_FIELD_GET(GMD_ID_REVID, gt->info.gmdid);
+
+		iter++;
 	}
 
 	if (copy_to_user(query_ptr, gt_list, size)) {