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drm/xe/ppgtt: clear the scratch page

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

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Matthew Auld 2022-12-22 14:09:02 +00:00 committed by Rodrigo Vivi
parent f3edf6917c
commit e63f81adcc
1 changed files with 8 additions and 6 deletions
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14
drivers/gpu/drm/xe/xe_pt.c
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@ -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,
ttm_bo_type_kernel,
XE_BO_CREATE_VRAM_IF_DGFX(gt) |
XE_BO_CREATE_IGNORE_MIN_PAGE_SIZE_BIT |
XE_BO_CREATE_PINNED_BIT);
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);