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| author | Matthew Brost <matthew.brost@intel.com> | 2024-10-24 01:12:00 +0300 |
|---|---|---|
| committer | Lucas De Marchi <lucas.demarchi@intel.com> | 2024-10-31 17:02:42 +0300 |
| commit | 993ca0eccec65a2cacc3cefb15d35ffadc6f00fb (patch) | |
| tree | 4304dd6d5952f19d7d9177fd479ed297b5831617 /tools/perf/scripts/python | |
| parent | 6a9d2e2988fa3ef9b03ddd9ba9aaa54dc23635e6 (diff) | |
| download | linux-993ca0eccec65a2cacc3cefb15d35ffadc6f00fb.tar.xz | |
drm/xe: Add mmio read before GGTT invalidate
On LNL without a mmio read before a GGTT invalidate the GuC can
incorrectly read the GGTT scratch page upon next access leading to jobs
not getting scheduled. A mmio read before a GGTT invalidate seems to fix
this. Since a GGTT invalidate is not a hot code path, blindly do a mmio
read before each GGTT invalidate.
Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: stable@vger.kernel.org
Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Reported-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/3164
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241023221200.1797832-1-matthew.brost@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
(cherry picked from commit 5a710196883e0ac019ac6df2a6d79c16ad3c32fa)
[ Fix conflict with mmio vs gt argument ]
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions