Re: [PATCH v4 00/11] v3d: Perfmon cleanup

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On 7/11/24 10:53, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxx>

When we had to quickly deal with a tree build issue via merging
792d16b5375d ("drm/v3d: Move perfmon init completely into own unit"), we
promised to follow up with a nicer solution.

As in the process of eliminating the hardcoded defines we have discovered a few
issues in handling of corner cases and userspace input validation, the fix has
turned into a larger series, but hopefully the end result is a justifiable
cleanup.

v2:
  * Re-order the patches so fixes come first while last three are optional
    cleanups.

v3:
  * Fixed a bunch of rebase errors I made when re-ordering patches from v1 to v2.
  * Dropped the double underscore from __v3d_timestamp_query_info_free.
  * Added v3d prefix to v3d_copy_query_info.
  * Renamed qinfo to query_info.
  * Fixed some spelling errors and bad patch references.
  * Added mention to get_user to one commit message.
  * Dropped one patch from the series which became redundant due other
    re-ordering.
  * Re-ordered last two patches with the view of dropping the last.

v4:
  * Fixed more rebase errors and details in commit messages.

  Cc: Maíra Canal <mcanal@xxxxxxxxxx>

Tvrtko Ursulin (11):
   drm/v3d: Prevent out of bounds access in performance query extensions
   drm/v3d: Fix potential memory leak in the timestamp extension
   drm/v3d: Fix potential memory leak in the performance extension
   drm/v3d: Validate passed in drm syncobj handles in the timestamp
     extension
   drm/v3d: Validate passed in drm syncobj handles in the performance
     extension
   drm/v3d: Move part of copying of reset/copy performance extension to a
     helper
   drm/v3d: Size the kperfmon_ids array at runtime
   drm/v3d: Do not use intermediate storage when copying performance
     query results
   drm/v3d: Move perfmon init completely into own unit
   drm/v3d: Prefer get_user for scalar types
   drm/v3d: Add some local variables in queries/extensions

I just applied all patches to drm-misc/drm-misc-next!

@Maxime, @Thomas or @Maarten, is it possible to cherry-pick the
following patches to drm-misc-fixes?

f32b5128d2c4 drm/v3d: Prevent out of bounds access in performance query extensions
753ce4fea621 drm/v3d: Fix potential memory leak in the timestamp extension
484de39fa5f5 drm/v3d: Fix potential memory leak in the performance extension
8d1276d1b8f7 drm/v3d: Validate passed in drm syncobj handles in the timestamp extension a546b7e4d73c drm/v3d: Validate passed in drm syncobj handles in the performance extension

Tvrtko made sure to make them independent (Thanks Tvrtko!), so I believe
it is going to be pretty straight forward to cherry-pick them.

Thanks Tvrtko for the patches and all the maintainers for the great
work!

Best Regards,
- Maíra


  drivers/gpu/drm/v3d/v3d_drv.c                 |   9 +-
  drivers/gpu/drm/v3d/v3d_drv.h                 |  16 +-
  drivers/gpu/drm/v3d/v3d_perfmon.c             |  44 +--
  .../gpu/drm/v3d/v3d_performance_counters.h    |  16 +-
  drivers/gpu/drm/v3d/v3d_sched.c               | 105 +++++--
  drivers/gpu/drm/v3d/v3d_submit.c              | 294 +++++++++++-------
  6 files changed, 290 insertions(+), 194 deletions(-)




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