drm/xe: Add debugfs pagefault_info

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Add a debugfs entry to dump Xe page fault queue state. The output
includes queue geometry (entry size, total size, head/tail), per-entry
allocation state counts, and whether each page fault worker cache is
currently valid.

This is intended to help debug page fault storms, chaining, and retry
behaviour without needing tracing.

Assisted-by: ChatGPT:gpt-5 # Documentation
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Maciej Patelczyk <maciej.patelczyk@intel.com>
Link: https://patch.msgid.link/20260806185202.3922432-11-matthew.brost@intel.com

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Matthew Brost 2026-08-06 11:52:00 -07:00

parent d67f040466

commit dd157120f7

3 changed files with 81 additions and 0 deletions

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11

drivers/gpu/drm/xe/xe_debugfs.c

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67

drivers/gpu/drm/xe/xe_pagefault.c

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3

drivers/gpu/drm/xe/xe_pagefault.h

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