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| author | Szymon Acedański <accek@invisiblethingslab.com> | 2026-09-16 19:30:30 +0200 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2026-09-22 12:44:51 -0400 |
| commit | 141008dec73521ccf64878517460cec8b3297251 (patch) | |
| tree | 4936093433231a789a0b73914e24427dc2c7dcca /tools/perf/scripts/python | |
| parent | 24a22fb3c731474b68e986af6804db450fb88617 (diff) | |
| download | linux-next-141008dec73521ccf64878517460cec8b3297251.tar.gz linux-next-141008dec73521ccf64878517460cec8b3297251.zip | |
drm/xe: Limit sg segment size to PAGE_SIZE on Xen PV
Fix display corruption on Xen PV dom0, where DMA buffers are not
guaranteed machine-contiguous, in which case bounce buffering kicks
in, breaking xe's memory coherency assumptions.
Apply the same workaround i915 carries in i915_sg_segment_size() since
commit 78a07fe777c4 ("drm/i915: stop abusing swiotlb_max_segment").
Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/work_items/8382
Link: https://lore.kernel.org/xen-devel/aYtznP_tT6xNPwf-@mail-itl/
Link: https://lore.kernel.org/all/20221020110308.1582518-1-hch@lst.de/ # i915 counterpart
Cc: Christoph Hellwig <hch@lst.de>
Cc: Robert Beckett <bob.beckett@collabora.com>
Cc: stable@vger.kernel.org # v6.8+
Signed-off-by: Szymon Acedański <accek@invisiblethingslab.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patch.msgid.link/20260916173030.3223833-1-accek@invisiblethingslab.com
(cherry picked from commit 77f704158f099b952681f207478a22d5b8218edb)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions