6.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Francois Dugast <francois.dugast@xxxxxxxxx> [ Upstream commit 731e46c032281601756f08cfa7d8505fe41166a9 ] The properties of this struct are used in long running context so make that clear by renaming it to lr, in alignment with the rest of the code. Cc: Matthew Brost <matthew.brost@xxxxxxxxx> Signed-off-by: Francois Dugast <francois.dugast@xxxxxxxxx> Reviewed-by: Matthew Brost <matthew.brost@xxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20240613170348.723245-1-francois.dugast@xxxxxxxxx Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> Stable-dep-of: 730b72480e29 ("drm/xe: prevent UAF around preempt fence") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/xe/xe_exec_queue.c | 6 +-- drivers/gpu/drm/xe/xe_exec_queue_types.h | 14 +++--- drivers/gpu/drm/xe/xe_preempt_fence.c | 2 +- drivers/gpu/drm/xe/xe_vm.c | 58 ++++++++++++------------ 4 files changed, 40 insertions(+), 40 deletions(-) diff --git a/drivers/gpu/drm/xe/xe_exec_queue.c b/drivers/gpu/drm/xe/xe_exec_queue.c index 2ae4420e29353..316731c5cce6d 100644 --- a/drivers/gpu/drm/xe/xe_exec_queue.c +++ b/drivers/gpu/drm/xe/xe_exec_queue.c @@ -67,7 +67,7 @@ static struct xe_exec_queue *__xe_exec_queue_alloc(struct xe_device *xe, q->fence_irq = >->fence_irq[hwe->class]; q->ring_ops = gt->ring_ops[hwe->class]; q->ops = gt->exec_queue_ops; - INIT_LIST_HEAD(&q->compute.link); + INIT_LIST_HEAD(&q->lr.link); INIT_LIST_HEAD(&q->multi_gt_link); q->sched_props.timeslice_us = hwe->eclass->sched_props.timeslice_us; @@ -631,8 +631,8 @@ int xe_exec_queue_create_ioctl(struct drm_device *dev, void *data, return PTR_ERR(q); if (xe_vm_in_preempt_fence_mode(vm)) { - q->compute.context = dma_fence_context_alloc(1); - spin_lock_init(&q->compute.lock); + q->lr.context = dma_fence_context_alloc(1); + spin_lock_init(&q->lr.lock); err = xe_vm_add_compute_exec_queue(vm, q); if (XE_IOCTL_DBG(xe, err)) diff --git a/drivers/gpu/drm/xe/xe_exec_queue_types.h b/drivers/gpu/drm/xe/xe_exec_queue_types.h index f0c40e8ad80a1..52a1965d91375 100644 --- a/drivers/gpu/drm/xe/xe_exec_queue_types.h +++ b/drivers/gpu/drm/xe/xe_exec_queue_types.h @@ -115,19 +115,19 @@ struct xe_exec_queue { enum xe_exec_queue_priority priority; } sched_props; - /** @compute: compute exec queue state */ + /** @lr: long-running exec queue state */ struct { - /** @compute.pfence: preemption fence */ + /** @lr.pfence: preemption fence */ struct dma_fence *pfence; - /** @compute.context: preemption fence context */ + /** @lr.context: preemption fence context */ u64 context; - /** @compute.seqno: preemption fence seqno */ + /** @lr.seqno: preemption fence seqno */ u32 seqno; - /** @compute.link: link into VM's list of exec queues */ + /** @lr.link: link into VM's list of exec queues */ struct list_head link; - /** @compute.lock: preemption fences lock */ + /** @lr.lock: preemption fences lock */ spinlock_t lock; - } compute; + } lr; /** @ops: submission backend exec queue operations */ const struct xe_exec_queue_ops *ops; diff --git a/drivers/gpu/drm/xe/xe_preempt_fence.c b/drivers/gpu/drm/xe/xe_preempt_fence.c index 5b243b7feb59d..e8b8ae5c6485e 100644 --- a/drivers/gpu/drm/xe/xe_preempt_fence.c +++ b/drivers/gpu/drm/xe/xe_preempt_fence.c @@ -129,7 +129,7 @@ xe_preempt_fence_arm(struct xe_preempt_fence *pfence, struct xe_exec_queue *q, list_del_init(&pfence->link); pfence->q = xe_exec_queue_get(q); dma_fence_init(&pfence->base, &preempt_fence_ops, - &q->compute.lock, context, seqno); + &q->lr.lock, context, seqno); return &pfence->base; } diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c index 3137cbbaabde0..fd5612cc6f19b 100644 --- a/drivers/gpu/drm/xe/xe_vm.c +++ b/drivers/gpu/drm/xe/xe_vm.c @@ -83,10 +83,10 @@ static bool preempt_fences_waiting(struct xe_vm *vm) lockdep_assert_held(&vm->lock); xe_vm_assert_held(vm); - list_for_each_entry(q, &vm->preempt.exec_queues, compute.link) { - if (!q->compute.pfence || + list_for_each_entry(q, &vm->preempt.exec_queues, lr.link) { + if (!q->lr.pfence || test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, - &q->compute.pfence->flags)) { + &q->lr.pfence->flags)) { return true; } } @@ -129,14 +129,14 @@ static int wait_for_existing_preempt_fences(struct xe_vm *vm) xe_vm_assert_held(vm); - list_for_each_entry(q, &vm->preempt.exec_queues, compute.link) { - if (q->compute.pfence) { - long timeout = dma_fence_wait(q->compute.pfence, false); + list_for_each_entry(q, &vm->preempt.exec_queues, lr.link) { + if (q->lr.pfence) { + long timeout = dma_fence_wait(q->lr.pfence, false); if (timeout < 0) return -ETIME; - dma_fence_put(q->compute.pfence); - q->compute.pfence = NULL; + dma_fence_put(q->lr.pfence); + q->lr.pfence = NULL; } } @@ -148,7 +148,7 @@ static bool xe_vm_is_idle(struct xe_vm *vm) struct xe_exec_queue *q; xe_vm_assert_held(vm); - list_for_each_entry(q, &vm->preempt.exec_queues, compute.link) { + list_for_each_entry(q, &vm->preempt.exec_queues, lr.link) { if (!xe_exec_queue_is_idle(q)) return false; } @@ -161,17 +161,17 @@ static void arm_preempt_fences(struct xe_vm *vm, struct list_head *list) struct list_head *link; struct xe_exec_queue *q; - list_for_each_entry(q, &vm->preempt.exec_queues, compute.link) { + list_for_each_entry(q, &vm->preempt.exec_queues, lr.link) { struct dma_fence *fence; link = list->next; xe_assert(vm->xe, link != list); fence = xe_preempt_fence_arm(to_preempt_fence_from_link(link), - q, q->compute.context, - ++q->compute.seqno); - dma_fence_put(q->compute.pfence); - q->compute.pfence = fence; + q, q->lr.context, + ++q->lr.seqno); + dma_fence_put(q->lr.pfence); + q->lr.pfence = fence; } } @@ -191,10 +191,10 @@ static int add_preempt_fences(struct xe_vm *vm, struct xe_bo *bo) if (err) goto out_unlock; - list_for_each_entry(q, &vm->preempt.exec_queues, compute.link) - if (q->compute.pfence) { + list_for_each_entry(q, &vm->preempt.exec_queues, lr.link) + if (q->lr.pfence) { dma_resv_add_fence(bo->ttm.base.resv, - q->compute.pfence, + q->lr.pfence, DMA_RESV_USAGE_BOOKKEEP); } @@ -211,10 +211,10 @@ static void resume_and_reinstall_preempt_fences(struct xe_vm *vm, lockdep_assert_held(&vm->lock); xe_vm_assert_held(vm); - list_for_each_entry(q, &vm->preempt.exec_queues, compute.link) { + list_for_each_entry(q, &vm->preempt.exec_queues, lr.link) { q->ops->resume(q); - drm_gpuvm_resv_add_fence(&vm->gpuvm, exec, q->compute.pfence, + drm_gpuvm_resv_add_fence(&vm->gpuvm, exec, q->lr.pfence, DMA_RESV_USAGE_BOOKKEEP, DMA_RESV_USAGE_BOOKKEEP); } } @@ -238,16 +238,16 @@ int xe_vm_add_compute_exec_queue(struct xe_vm *vm, struct xe_exec_queue *q) if (err) goto out_up_write; - pfence = xe_preempt_fence_create(q, q->compute.context, - ++q->compute.seqno); + pfence = xe_preempt_fence_create(q, q->lr.context, + ++q->lr.seqno); if (!pfence) { err = -ENOMEM; goto out_fini; } - list_add(&q->compute.link, &vm->preempt.exec_queues); + list_add(&q->lr.link, &vm->preempt.exec_queues); ++vm->preempt.num_exec_queues; - q->compute.pfence = pfence; + q->lr.pfence = pfence; down_read(&vm->userptr.notifier_lock); @@ -284,12 +284,12 @@ void xe_vm_remove_compute_exec_queue(struct xe_vm *vm, struct xe_exec_queue *q) return; down_write(&vm->lock); - list_del(&q->compute.link); + list_del(&q->lr.link); --vm->preempt.num_exec_queues; - if (q->compute.pfence) { - dma_fence_enable_sw_signaling(q->compute.pfence); - dma_fence_put(q->compute.pfence); - q->compute.pfence = NULL; + if (q->lr.pfence) { + dma_fence_enable_sw_signaling(q->lr.pfence); + dma_fence_put(q->lr.pfence); + q->lr.pfence = NULL; } up_write(&vm->lock); } @@ -325,7 +325,7 @@ static void xe_vm_kill(struct xe_vm *vm) vm->flags |= XE_VM_FLAG_BANNED; trace_xe_vm_kill(vm); - list_for_each_entry(q, &vm->preempt.exec_queues, compute.link) + list_for_each_entry(q, &vm->preempt.exec_queues, lr.link) q->ops->kill(q); xe_vm_unlock(vm); -- 2.43.0
