Intel-XE Archive on lore.kernel.org
 help / color / mirror / Atom feed
* [PATCH v1 0/2] drm/xe/vf: New approach for post-migration LRC fixups
@ 2026-04-29 20:39 Tomasz Lis
  2026-04-29 20:39 ` [PATCH v1 1/2] drm/xe/vf: Late fixups of LRCs after VF migration Tomasz Lis
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: Tomasz Lis @ 2026-04-29 20:39 UTC (permalink / raw)
  To: intel-xe
  Cc: Michał Winiarski, Michał Wajdeczko,
	Piotr Piórkowski, Matthew Brost

The current approach to LRC recovery requires caution from developers
when modifying any LRC-related code. More flexible solution may allow
to avoid future troubles.

The current code also includes LRC creation repeat which looks a bit
suspicious - it was developed without detailed knowledge of which
part of LRC creation requires a repeat. Now after extensive debug we
know that the repeat is only required for BO mapping, and actually
all BOs should be protected, not only the ones storing LRCs.

This fixes a very rare bug where BO would be incorrectly created
during migration resulting in CAT error generated by GPU. Chances
of triggering this error were well below 0.1%.

Signed-off-by: Tomasz Lis <tomasz.lis@intel.com>

Tomasz Lis (2):
  drm/xe/vf: Late fixups of LRCs after VF migration
  drm/xe: After VF migration, repeat BO mapping in progress

 drivers/gpu/drm/xe/xe_exec_queue.c        | 55 +++++++++++++----------
 drivers/gpu/drm/xe/xe_exec_queue.h        |  2 +-
 drivers/gpu/drm/xe/xe_ggtt.c              | 17 +++++++
 drivers/gpu/drm/xe/xe_gt_sriov_vf.c       |  6 +--
 drivers/gpu/drm/xe/xe_gt_sriov_vf_types.h |  2 +
 drivers/gpu/drm/xe/xe_guc_submit.c        | 35 +++------------
 drivers/gpu/drm/xe/xe_guc_submit.h        |  2 -
 drivers/gpu/drm/xe/xe_memirq.c            |  8 +++-
 8 files changed, 67 insertions(+), 60 deletions(-)

-- 
2.25.1


^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2026-04-30 10:13 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-04-29 20:39 [PATCH v1 0/2] drm/xe/vf: New approach for post-migration LRC fixups Tomasz Lis
2026-04-29 20:39 ` [PATCH v1 1/2] drm/xe/vf: Late fixups of LRCs after VF migration Tomasz Lis
2026-04-29 20:39 ` [PATCH v1 2/2] drm/xe: After VF migration, repeat BO mapping in progress Tomasz Lis
2026-04-29 20:57 ` ✓ CI.KUnit: success for drm/xe/vf: New approach for post-migration LRC fixups Patchwork
2026-04-29 21:52 ` ✓ Xe.CI.BAT: " Patchwork
2026-04-30 10:13 ` ✓ Xe.CI.FULL: " Patchwork

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox