Re: [PATCH v3 0/2] Add prefetch fault support for Xe3p

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

Ignore! This series was created due to subject line change by mistake.
Will Resend the version in original series.

Thanks,
Varun

On 28-Jan-26 2:41 PM, Varun Gupta wrote:
> 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 adds a dedicated stats counter to track invalid prefetch
> pagefaults separately from regular faults.
>
> 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. The prefetch bit value is included in error messages
> to distinguish prefetch faults from regular faults.
>
> Based on original patches by Brian Welty and Priyanka Dandamudi.
>
> v3:
>   - Split stats counter into separate patch (Matt Brost)
>   - Drop xe_guc_pagefault_types.h rename patch (Matt Brost)
>   - Move prefetch check to caller of xe_pagefault_print (Matt Brost)
>   - Rename XE3P_PFD_PREFETCH/PFR_PREFETCH to remove XE3P_ prefix,
>     add comments about Xe3+ platform support (Matt Brost)
>   - Rename PREFETCH_PAGEFAULT_COUNT to INVALID_PREFETCH_PAGEFAULT_COUNT
>     for clarity (Matt Brost)
>   - Include prefetch bit value in error message (Matt Brost)
>
> v2:
>   - Initial implementation combining all changes
>
> Varun Gupta (2):
>    drm/xe: Add counter for invalid prefetch pagefaults
>    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, 27 insertions(+), 6 deletions(-)
>