Commit e63f81ad authored by Matthew Auld's avatar Matthew Auld Committed by Rodrigo Vivi
Browse files

drm/xe/ppgtt: clear the scratch page 



We need to ensure we don't leak the contents to userspace.

Signed-off-by: default avatarMatthew Auld <matthew.auld@intel.com>
Reviewed-by: default avatarMatthew Brost <matthew.brost@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
parent f3edf691

drivers/gpu/drm/xe/xe_pt.c

+8 −6
Original line number Diff line number Diff line
@@ -333,14 +333,16 @@ int xe_pt_create_scratch(struct xe_device *xe, struct xe_gt *gt, 
	u8 id = gt->info.id;

	int i;



	vm->scratch_bo[id] = xe_bo_create(xe, gt, vm, SZ_4K,

	vm->scratch_bo[id] = xe_bo_create_pin_map(xe, gt, vm, SZ_4K,

						  ttm_bo_type_kernel,

						  XE_BO_CREATE_VRAM_IF_DGFX(gt) |

						  XE_BO_CREATE_IGNORE_MIN_PAGE_SIZE_BIT |

						  XE_BO_CREATE_PINNED_BIT);

	if (IS_ERR(vm->scratch_bo[id]))

		return PTR_ERR(vm->scratch_bo[id]);

	xe_bo_pin(vm->scratch_bo[id]);



	xe_map_memset(vm->xe, &vm->scratch_bo[id]->vmap, 0, 0,

		      vm->scratch_bo[id]->size);



	for (i = 0; i < vm->pt_root[id]->level; i++) {

		vm->scratch_pt[id][i] = xe_pt_create(vm, gt, i);