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* [RFC PATCH 0/2] LNL_FLUSH_* enhancements
@ 2026-07-22 21:59 Matthew Brost
  2026-07-22 21:59 ` [RFC PATCH 1/2] drm/xe: Scope LNL_FLUSH_* workaround to affected CPUs, not GPU platform Matthew Brost
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: Matthew Brost @ 2026-07-22 21:59 UTC (permalink / raw)
  To: intel-xe

The LNL_FLUSH_* workaround is a horrid hack that has been papering over
bugs. Let's limit its scope to determine whether it is actually needed
on newer platforms and add more debug information for cases where it
still occurs.

This came up again in the context of this series [1].

Matt

[1] https://patchwork.freedesktop.org/series/170916/ 

Matthew Brost (2):
  drm/xe: Scope LNL_FLUSH_* workaround to affected CPUs, not GPU
    platform
  drm/xe: Add DRM_XE_DEBUG_FLUSH_WA to force the CPU flush workaround on

 drivers/gpu/drm/xe/Kconfig.debug        | 16 ++++++
 drivers/gpu/drm/xe/Makefile             |  1 +
 drivers/gpu/drm/xe/xe_cpu_info.c        | 67 +++++++++++++++++++++++++
 drivers/gpu/drm/xe/xe_cpu_info.h        | 13 +++++
 drivers/gpu/drm/xe/xe_device.h          | 35 +++++++++----
 drivers/gpu/drm/xe/xe_device_types.h    | 10 ++++
 drivers/gpu/drm/xe/xe_guc_ct.c          | 56 +++++++++++++++++++--
 drivers/gpu/drm/xe/xe_guc_ct.h          |  1 +
 drivers/gpu/drm/xe/xe_guc_tlb_inval.c   |  2 +-
 drivers/gpu/drm/xe/xe_pci.c             | 10 ++++
 drivers/gpu/drm/xe/xe_tlb_inval.c       | 28 +++++++++++
 drivers/gpu/drm/xe/xe_wait_user_fence.c |  6 ++-
 12 files changed, 228 insertions(+), 17 deletions(-)
 create mode 100644 drivers/gpu/drm/xe/xe_cpu_info.c
 create mode 100644 drivers/gpu/drm/xe/xe_cpu_info.h

-- 
2.34.1


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

end of thread, other threads:[~2026-07-23  0:20 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-07-22 21:59 [RFC PATCH 0/2] LNL_FLUSH_* enhancements Matthew Brost
2026-07-22 21:59 ` [RFC PATCH 1/2] drm/xe: Scope LNL_FLUSH_* workaround to affected CPUs, not GPU platform Matthew Brost
2026-07-22 21:59 ` [RFC PATCH 2/2] drm/xe: Add DRM_XE_DEBUG_FLUSH_WA to force the CPU flush workaround on Matthew Brost
2026-07-22 23:45 ` ✗ CI.checkpatch: warning for LNL_FLUSH_* enhancements Patchwork
2026-07-22 23:46 ` ✓ CI.KUnit: success " Patchwork
2026-07-23  0:20 ` ✓ Xe.CI.BAT: " Patchwork

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