diff options
| author | Imre Deak <[email protected]> | 2015-08-14 18:43:30 +0300 |
|---|---|---|
| committer | Daniel Vetter <[email protected]> | 2015-08-26 09:39:14 +0200 |
| commit | e5756c10d841ddb448293c849392f3d6b809561f (patch) | |
| tree | 4a8d82055d6736a0d76fe04e18334156466faa62 /tools/perf/scripts/python/syscall-counts.py | |
| parent | 319404df2f682ddabf98cbf6421bb43b951ca978 (diff) | |
drm/i915/bxt: don't allow cached GEM mappings on A stepping
Due to a coherency issue on BXT A steppings we can't guarantee a
coherent view of cached (CPU snooped) GPU mappings, so fail such
requests. User space is supposed to fall back to uncached mappings in
this case.
v2:
- limit the WA to A steppings, on later stepping this HW issue is fixed
v3:
- return error instead of trying to work around the issue in kernel,
since that could confuse user space (Chris)
Testcast: igt/gem_store_dword_batches_loop/cached-mapping
Signed-off-by: Imre Deak <[email protected]>
Reviewed-by: Chris Wilson <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions