[PATCH v2 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 renames xe_pagefault_print to xe_pagefault_error_account and
adds an err parameter to prepare for prefetch error handling.

Patch 2 implements the prefetch support by extracting the prefetch bit
from the fault descriptor and echoing it in the response (bit 6) only
when handling fails. This prevents CAT errors for prefetch faults.
Stats are incremented for prefetch errors without verbose logging to
avoid log spam.

Based on original patches by Brian Welty and Priyanka Dandamudi.

v2: Clarified first commit message to describe only the changes made
    in that commit.
    Changed comment wording from "repairs" to "handling" for clarity.
    (Matt Roper)

Varun Gupta (2):
  drm/xe: Rename xe_pagefault_print to xe_pagefault_error_account
  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(-)

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2.43.0