[PATCH v3 0/9] Make set_dev_pasid op supporting domain replacement

[Yi Liu <yi.l.liu@intel.com>]

This splits the preparation works of the iommu and the Intel iommu driver
out from the iommufd pasid attach/replace series. [1]

To support domain replacement, the definition of the set_dev_pasid op
needs to be enhanced. Meanwhile, the existing set_dev_pasid callbacks
should be extended as well to suit the new definition.

This series first prepares the Intel iommu set_dev_pasid op for the new
definition, adds the missing set_dev_pasid support for nested domain, makes
ARM SMMUv3 set_dev_pasid op to suit the new definition, and in the end
enhances the definition of set_dev_pasid op. The AMD set_dev_pasid callback
is extended to fail if the caller tries to do domain replacement to meet the
new definition of set_dev_pasid op. AMD iommu driver would support it later
per Vasant [2].

[1] https://lore.kernel.org/linux-iommu/20240412081516.31168-1-yi.l.liu@intel.com/
[2] https://lore.kernel.org/linux-iommu/fa9c4fc3-9365-465e-8926-b4d2d6361b9c@amd.com/

v3:
 - Add Kevin and Jason's r-b to patch 01, 02, 04, 05 and 06 of v2
 - Add back the patch 03 of v1 to make the pasid setup helpers do all the pasid entry
   modification, hence the set_dev_pasid path is really rollback-less, which is spotted
   by Baolu.
 - Rename prepare_domain_attach_device() (Baolu)
 - Use unsigned int instead of u32 for flags (Baolu)
 - Remove a stale comment in arm_smmu_set_pasid (Will)

v2: https://lore.kernel.org/linux-iommu/20240912130427.10119-1-yi.l.liu@intel.com/
 - Make ARM SMMUv3 set_dev_pasid op support domain replacement (Jason)
 - Drop patch 03 of v1 (Kevin)
 - Multiple tweaks in VT-d driver (Kevin)

v1: https://lore.kernel.org/linux-iommu/20240628085538.47049-1-yi.l.liu@intel.com/

Regards,
	Yi Liu

Jason Gunthorpe (1):
  iommu/arm-smmu-v3: Make set_dev_pasid() op support replace

Lu Baolu (1):
  iommu/vt-d: Add set_dev_pasid callback for nested domain

Yi Liu (7):
  iommu: Pass old domain to set_dev_pasid op
  iommu/vt-d: Move intel_drain_pasid_prq() into
    intel_pasid_tear_down_entry()
  iommu/vt-d: Let intel_pasid_tear_down_entry() return pasid entry
  iommu/vt-d: Make pasid setup helpers support modifying present pasid
    entry
  iommu/vt-d: Rename prepare_domain_attach_device()
  iommu/vt-d: Make intel_iommu_set_dev_pasid() to handle domain
    replacement
  iommu: Make set_dev_pasid op support domain replacement

 drivers/iommu/amd/amd_iommu.h                 |   3 +-
 drivers/iommu/amd/pasid.c                     |   6 +-
 .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c   |   5 +-
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c   |  12 +-
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h   |   2 +-
 drivers/iommu/intel/iommu.c                   | 128 ++++++++++++------
 drivers/iommu/intel/iommu.h                   |   7 +-
 drivers/iommu/intel/nested.c                  |   3 +-
 drivers/iommu/intel/pasid.c                   |  82 ++++++-----
 drivers/iommu/intel/pasid.h                   |   9 +-
 drivers/iommu/intel/svm.c                     |   6 +-
 drivers/iommu/iommu.c                         |   3 +-
 include/linux/iommu.h                         |   5 +-
 13 files changed, 163 insertions(+), 108 deletions(-)

-- 
2.34.1