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| author | Matthew Auld | 2018-05-11 11:51:40 +0200 |
|---|---|---|
| committer | Chris Wilson | 2018-05-13 11:29:18 +0200 |
| commit | f79401b477bc22914e4c37ea39c611117bd10b19 (patch) | |
| tree | 87d02c0acaae33cf28065bd63fc9a5d82d48cf4e /drivers/gpu/drm/i915/i915_gem_gtt.h | |
| parent | drm/i915/oa: Check that OA is disabled before unpinning (diff) | |
| download | kernel-qcow2-linux-f79401b477bc22914e4c37ea39c611117bd10b19.tar.gz kernel-qcow2-linux-f79401b477bc22914e4c37ea39c611117bd10b19.tar.xz kernel-qcow2-linux-f79401b477bc22914e4c37ea39c611117bd10b19.zip | |
drm/i915/selftests: scrub 64K
We write all 4K page entries, even when using 64K pages. In order to
verify that the HW isn't cheating by using the 4K PTE instead of the 64K
PTE, we want to remove all the surplus entries. If the HW skipped the
64K PTE, it will read/write into the scratch page instead - which we
detect as missing results during selftests.
v2: much improved commentary (Chris)
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Changbin Du <changbin.du@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180511095140.25590-1-matthew.auld@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h index 1db0dedb4059..aec4f73574f4 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.h +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h @@ -342,6 +342,7 @@ struct i915_address_space { void (*clear_pages)(struct i915_vma *vma); I915_SELFTEST_DECLARE(struct fault_attr fault_attr); + I915_SELFTEST_DECLARE(bool scrub_64K); }; #define i915_is_ggtt(V) (!(V)->file) |