提交 93225b0d 编写于 作者: J Jerome Glisse 提交者: Dave Airlie

drm/radeon/kms: forbid big bo allocation (fdo 31708) v3

Forbid allocating buffer bigger than visible VRAM or GTT, also
properly set lpfn field.

v2 - use max macro
   - silence warning
v3 - don't explicitly set range limit
   - use min macro

Cc: stable <stable@kernel.org>
Signed-off-by: NJerome Glisse <jglisse@redhat.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>
上级 541cc966
......@@ -69,7 +69,7 @@ void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
u32 c = 0;
rbo->placement.fpfn = 0;
rbo->placement.lpfn = rbo->rdev->mc.active_vram_size >> PAGE_SHIFT;
rbo->placement.lpfn = 0;
rbo->placement.placement = rbo->placements;
rbo->placement.busy_placement = rbo->placements;
if (domain & RADEON_GEM_DOMAIN_VRAM)
......@@ -91,7 +91,8 @@ int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
{
struct radeon_bo *bo;
enum ttm_bo_type type;
int page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
unsigned long max_size = 0;
int r;
if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
......@@ -104,6 +105,14 @@ int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
}
*bo_ptr = NULL;
/* maximun bo size is the minimun btw visible vram and gtt size */
max_size = min(rdev->mc.visible_vram_size, rdev->mc.gtt_size);
if ((page_align << PAGE_SHIFT) >= max_size) {
printk(KERN_WARNING "%s:%d alloc size %ldM bigger than %ldMb limit\n",
__func__, __LINE__, page_align >> (20 - PAGE_SHIFT), max_size >> 20);
return -ENOMEM;
}
retry:
bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
if (bo == NULL)
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册