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| author | Matthew Auld <matthew.auld@intel.com> | 2018-05-11 10:51:40 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2018-05-13 10:29:18 +0100 |
| commit | f79401b477bc22914e4c37ea39c611117bd10b19 (patch) | |
| tree | 87d02c0acaae33cf28065bd63fc9a5d82d48cf4e /drivers/gpu/drm/i915/selftests | |
| parent | e896d29a548d04371ce746f7d02a8488ff93d812 (diff) | |
| download | talos-obmc-linux-f79401b477bc22914e4c37ea39c611117bd10b19.tar.gz talos-obmc-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/selftests')
| -rw-r--r-- | drivers/gpu/drm/i915/selftests/huge_pages.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/selftests/huge_pages.c b/drivers/gpu/drm/i915/selftests/huge_pages.c index d7c8ef8e6764..91c72911be3c 100644 --- a/drivers/gpu/drm/i915/selftests/huge_pages.c +++ b/drivers/gpu/drm/i915/selftests/huge_pages.c @@ -1757,6 +1757,9 @@ int i915_gem_huge_page_live_selftests(struct drm_i915_private *dev_priv) goto out_unlock; } + if (ctx->ppgtt) + ctx->ppgtt->base.scrub_64K = true; + err = i915_subtests(tests, ctx); out_unlock: |
