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* [PATCH v2 0/5] VRAM health check + CCS fix
@ 2026-09-02 10:39 Matthew Auld
  2026-09-02 10:39 ` [PATCH v2 1/5] drm/xe/migrate: support 4K PTEs for identity map Matthew Auld
                   ` (6 more replies)
  0 siblings, 7 replies; 10+ messages in thread
From: Matthew Auld @ 2026-09-02 10:39 UTC (permalink / raw)
  To: intel-xe

Add a basic VRAM health check routine, which does some basic sanity
checking on the last VRAM page. This could be extended in the future.
This seems to reproduce the same CCS issue as Linus, on my b570.

This also picks up the fix from Linus. I went with leaving it as-is,
but that means we need to fixup the identity mapping to support 4K
pages for the tail part of usable VRAM.

It doesn't look like anything in our CI actually has the CCS alignment
issue present, so merging the fix from Linus without the identity map
changes likely shouldn't trigger any asserts, if that does end up
coming in via another tree, AFAICT.

v2:
 - Give more details around what the VRAM health check actually does
   and how it catches the CCS bug (Matt B).
 - Tweak the CCS base + alignment print (Matt B).
 - Drop the fix from Linus; this is now already in drm-tip.
 - Add some hardening for VRAM CPU mapping also.

-- 
2.55.0


^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2026-09-02 11:35 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-09-02 10:39 [PATCH v2 0/5] VRAM health check + CCS fix Matthew Auld
2026-09-02 10:39 ` [PATCH v2 1/5] drm/xe/migrate: support 4K PTEs for identity map Matthew Auld
2026-09-02 10:39 ` [PATCH v2 2/5] drm/xe/vram: report FLAT_CCS base misalignment Matthew Auld
2026-09-02 10:39 ` [PATCH v2 3/5] drm/xe/vram: revamp CPU VRAM mapping Matthew Auld
2026-09-02 10:49   ` sashiko-bot
2026-09-02 10:56     ` Matthew Auld
2026-09-02 10:39 ` [PATCH v2 4/5] drm/xe: add force option for global invalidation Matthew Auld
2026-09-02 10:39 ` [PATCH v2 5/5] drm/xe/vram: add early VRAM health check Matthew Auld
2026-09-02 10:47 ` ✓ CI.KUnit: success for VRAM health check + CCS fix (rev2) Patchwork
2026-09-02 11:35 ` ✗ Xe.CI.BAT: failure " Patchwork

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