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[v6,0/2] io-pgtable-arm + drm/msm: Extend iova fault debugging

Message ID 20240717163627.43423-1-robdclark@gmail.com (mailing list archive)
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Series io-pgtable-arm + drm/msm: Extend iova fault debugging | expand

Message

Rob Clark July 17, 2024, 4:36 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
v5: Drop the callback approach
v6: Make walk-data struct pgtable specific and rename
    io_pgtable_walk_data to arm_lpae_io_pgtable_walk_data

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           |  9 +++++++
 drivers/gpu/drm/msm/msm_gpu.h           |  8 ++++++
 drivers/gpu/drm/msm/msm_iommu.c         | 22 +++++++++++++++
 drivers/gpu/drm/msm/msm_mmu.h           |  3 ++-
 drivers/iommu/io-pgtable-arm.c          | 36 ++++++++++++++++++-------
 include/linux/io-pgtable.h              | 17 ++++++++++++
 7 files changed, 95 insertions(+), 10 deletions(-)