[PATCH 0/2] drm/xe: Add prefetch pagefault support for Xe3p

[Varun Gupta <varun.gupta@intel.com>]

Xe3p hardware prefetches memory ranges and notifies software via an
additional bit (bit 11) in the page fault descriptor that the fault
was caused by prefetch.

Patch 1 refactors the error handling to print the fault only when handling
fails, consolidating the logging with the response status.

Patch 2 implements the prefetch support by extracting the prefetch bit from
the fault descriptor and echoing it in the response on unsuccessful handling.
This prevents CAT errors for prefetch faults. Stats are incremented for
prefetch errors without verbose logging to avoid spamming the log.

Based on original patches by Brian Welty and Priyanka Dandamudi, and
originally implemented by Lucas De Marchi.

v2: Changed comment wording from "repairs" to "handling" per Matt Roper's
feedback.

Tested with xe_prefetch_fault IGT test.

Varun Gupta (2):
  drm/xe: Coalesce pagefault error handling
  drm/xe: Add prefetch fault support for Xe3p

 drivers/gpu/drm/xe/xe_gt_stats.c        |  1 +
 drivers/gpu/drm/xe/xe_gt_stats_types.h  |  1 +
 drivers/gpu/drm/xe/xe_guc_fwif.h        |  5 +++--
 drivers/gpu/drm/xe/xe_guc_pagefault.c   |  2 ++
 drivers/gpu/drm/xe/xe_pagefault.c       | 16 ++++++++++++++--
 drivers/gpu/drm/xe/xe_pagefault_types.h |  8 +++++++-
 6 files changed, 28 insertions(+), 5 deletions(-)

-- 
2.43.0