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[v4,0/2] io-pgtable-arm + drm/msm: Extend iova fault debugging

Message ID 20240523175227.117984-1-robdclark@gmail.com (mailing list archive)
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Series io-pgtable-arm + drm/msm: Extend iova fault debugging | expand

Message

Rob Clark May 23, 2024, 5:52 p.m. UTC 
From: Rob Clark <robdclark@chromium.org>

This series extends io-pgtable-arm with a method to retrieve the page
table entries traversed in the process of address translation, and then
beefs up drm/msm gpu devcore dump to include this (and additional info)
in the devcore dump.

This is a respin of https://patchwork.freedesktop.org/series/94968/
(minus a patch that was already merged)

v2: Fix an armv7/32b build error in the last patch
v3: Incorperate Will Deacon's suggestion to make the interface
    callback based.
v4: Actually wire up the callback

Rob Clark (2):
  iommu/io-pgtable-arm: Add way to debug pgtable walk
  drm/msm: Extend gpu devcore dumps with pgtbl info

 drivers/gpu/drm/msm/adreno/adreno_gpu.c | 10 +++++
 drivers/gpu/drm/msm/msm_gpu.c           | 22 +++++++++++
 drivers/gpu/drm/msm/msm_gpu.h           |  8 ++++
 drivers/gpu/drm/msm/msm_iommu.c         | 18 +++++++++
 drivers/gpu/drm/msm/msm_mmu.h           |  5 ++-
 drivers/iommu/io-pgtable-arm.c          | 51 ++++++++++++++++++++-----
 include/linux/io-pgtable.h              |  4 ++
 7 files changed, 108 insertions(+), 10 deletions(-)