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drm/i915: Compare user's 64b GTT offset even on 32b

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Beware mixing unsigned long constants and 64b values, as on 32b the
constant will be zero extended and discard the high 32b when used as
a mask!

Reported-by: Sergii Romantsov <sergii.romantsov@globallogic.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108282
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181025091823.20571-2-chris@chris-wilson.co.uk
(cherry picked from commit 6fc4e48f9e)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Chris Wilson 2018-10-25 10:18:23 +01:00 committed by Joonas Lahtinen
parent c58281056a
commit 0856032874
3 changed files with 3 additions and 2 deletions
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1
drivers/gpu/drm/i915/gvt/gtt.h
View File

@ -35,7 +35,6 @@
#define _GVT_GTT_H_ #define _GVT_GTT_H_
#define I915_GTT_PAGE_SHIFT 12 #define I915_GTT_PAGE_SHIFT 12
#define I915_GTT_PAGE_MASK (~(I915_GTT_PAGE_SIZE - 1))
struct intel_vgpu_mm; struct intel_vgpu_mm;

2
drivers/gpu/drm/i915/i915_gem_execbuffer.c
View File

@ -460,7 +460,7 @@ eb_validate_vma(struct i915_execbuffer *eb,
* any non-page-aligned or non-canonical addresses. * any non-page-aligned or non-canonical addresses.
*/ */
if (unlikely(entry->flags & EXEC_OBJECT_PINNED && if (unlikely(entry->flags & EXEC_OBJECT_PINNED &&
entry->offset != gen8_canonical_addr(entry->offset & PAGE_MASK))) entry->offset != gen8_canonical_addr(entry->offset & I915_GTT_PAGE_MASK)))
return -EINVAL; return -EINVAL;
/* pad_to_size was once a reserved field, so sanitize it */ /* pad_to_size was once a reserved field, so sanitize it */

2
drivers/gpu/drm/i915/i915_gem_gtt.h
View File

@ -49,6 +49,8 @@
#define I915_GTT_PAGE_SIZE I915_GTT_PAGE_SIZE_4K #define I915_GTT_PAGE_SIZE I915_GTT_PAGE_SIZE_4K
#define I915_GTT_MAX_PAGE_SIZE I915_GTT_PAGE_SIZE_2M #define I915_GTT_MAX_PAGE_SIZE I915_GTT_PAGE_SIZE_2M
#define I915_GTT_PAGE_MASK -I915_GTT_PAGE_SIZE
#define I915_GTT_MIN_ALIGNMENT I915_GTT_PAGE_SIZE #define I915_GTT_MIN_ALIGNMENT I915_GTT_PAGE_SIZE
#define I915_FENCE_REG_NONE -1 #define I915_FENCE_REG_NONE -1