[PATCH v5 0/6] Add PASID support to SMMUv3 unmanaged domains

[Michael Shavit <mshavit@google.com>]

This patch series implements the set_dev_pasid operation for DMA and UNMANAGED
iommu domains. The series depends on the CD table refactor patch series as a
pre-requisite.

This patch series is also available on gerrit with Jean's SMMU test
engine patches cherry-picked along with an additional set of tests for
this feature: https://linux-review.googlesource.com/c/linux/kernel/git/torvalds/linux/+/24770/6

Thanks,
Michael Shavit

Changes in v5:
- Renamed domain_head to list for consistency with other lists
- Renamed attached_domains to attached_ssids to avoid confusion. This is
  a list of master/ssid pairs the domain is attached to, not a list of
  other domains.
- Fix missing error value return in set_dev_pasid
- Fix issue where nr_attached_pasid_domains isn't updated when
  arm_smmu_write_ctx_desc fails
- Fix missing free of the attached_domain node
- Split off the CD table refactor to separate patch series: https://lore.kernel.org/all/20230802163328.2623773-1-mshavit@google.com/
- Link to v4: https://lore.kernel.org/all/20230621063825.268890-1-mshavit@google.com/
- New commit: Free attached pasid domains on release_device() call

Changes in v4:
- Fix build warning and error on patch 07. The error was introduced
  during a v1->v2 rebase and hidden by patch 09 which removed the
  offending line.
- Link to v3: https://lore.kernel.org/all/20230614154304.2860121-1-mshavit@google.com/

Changes in v3:
- Dropped the bulk of the SVA refactoring to re-work as a follow-up
  series.
- Reworded cover letter to omit dropped changes.
- Rebased on 6.4 tip
- Link to v2: https://lore.kernel.org/all/20230606120854.4170244-1-mshavit@google.com/

Changes in v2:
- Reworded cover letter and commits based on v1 feedback.
- Split and reworked `iommu/arm-smmu-v3: Move cdtable to arm_smmu_master`
- Added SVA clean-up and refactor.
- A few other small bug fixes and cosmetics.
- Link to v1: https://lore.kernel.org/all/20230510205054.2667898-1-mshavit@google.com/

Michael Shavit (6):
  iommu/arm-smmu-v3: Simplify arm_smmu_enable_ats
  iommu/arm-smmu-v3: Keep track of attached ssids
  iommu/arm-smmu-v3: Add helper for atc invalidation
  iommu/arm-smmu-v3: Implement set_dev_pasid
  iommu/arm-smmu-v3: Free pasid domains on iommu release
  iommu/arm-smmu-v3: Cleanup arm_smmu_domain_finalise

 .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c   |  28 +-
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c   | 283 ++++++++++++++----
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h   |  31 +-
 3 files changed, 267 insertions(+), 75 deletions(-)


base-commit: 5d0c230f1de8c7515b6567d9afba1f196fb4e2f4
prerequisite-patch-id: c8d21ff19c2c1dd18799a6b83f483add654d187e
prerequisite-patch-id: bdeb88498393e7049fd22cfc24d2b7674e81bb85
prerequisite-patch-id: b84be729e187aa2d67a7f90ec396e2b878c76243
prerequisite-patch-id: 0ee7da8eaae46e2f8a0a791808f421025e148d79
prerequisite-patch-id: 2d80d99964059ecb31065ec4954130c817b9046c
prerequisite-patch-id: 49910462ec68b834c6af18ae9c58de25982e2752
prerequisite-patch-id: 1daf192523b0b7ed24a670b47ad07366aca6d26d
prerequisite-patch-id: 96101f0f4fd95cdb442cfe0881d80c3a61a93716
-- 
2.41.0.585.gd2178a4bd4-goog