[PATCH v4 0/7] iommu/smmuv3: Add IOMMUFD dirty tracking support for SMMUv3

[Shameer Kolothum]

Hi,

v3 --> v4

 -Re-based on top of 6.10-rc1
 -Added patches (1, 2 & 3) on top of v3 to make this series independent
  of Jason's SMMUv3 refactor series.
 -Addressed comments received on v3 and added tags.

Please take a look and let me know your feedback.

Thanks,
Shameer

---
This is revisiting the earlier attempts [1, 2] to use SMMUv3 HTTU feature
for dirty page tracking. The Intel/AMD support is already mainline.

Basic sanity tests are done using an emulation setup and on a test
hardware setup. Block page split/merge(BBML) is not part of this
series. I am planning to send it separately.

v2 --> v3

 -Rebased on top of the latest of Jason's refactor series git[3].
 -Addressed comments from Ryan and Jason(patch 2 & 3, Thanks!)
 -Added R-by tags  to 1 & 4.

v1 --> v2:
https://lore.kernel.org/linux-iommu/20231128094940.1344-1-shameerali.kolothum.thodi@huawei.com/

Addressed review comments from Jason and Joao(Thanks)
   -Moved dirty_ops setting to domain finalise(patch #3)
   -Only enable DBM for stage 1 if domain_alloc_user() requests it.
   -Changed IO page table walker(patch #2) and tested with 4KB/16KB/64KB
    with l1/l2/l3 traversal.(The earlier one had a bug where it fails to
    walk L3 level).
   -Rearranged patches a bit to improve bi-sectability.
   -Rebased on top of Jason's v5 of SMMUv3 new API series git.

1. https://lore.kernel.org/lkml/20210413085457.25400-1-zhukeqian1@huawei.com/
2. https://lore.kernel.org/linux-iommu/20230518204650.14541-1-joao.m.martins@oracle.com/
3. https://github.com/jgunthorpe/linux/commits/smmuv3_newapi

Jason Gunthorpe (2):
  iommu/arm-smmu-v3: Convert to domain_alloc_sva()
  iommu/arm-smmu-v3: Factor out a common arm_smmu_domain_alloc()

Jean-Philippe Brucker (1):
  iommu/arm-smmu-v3: Add feature detection for HTTU

Joao Martins (1):
  iommu/arm-smmu-v3: Add support for dirty tracking in domain alloc

Kunkun Jiang (1):
  iommu/arm-smmu-v3: Enable HTTU for stage1 with io-pgtable mapping

Shameer Kolothum (2):
  iommu/arm-smmu-v3: Add support for domain_alloc_user fn
  iommu/io-pgtable-arm: Add read_and_clear_dirty() support

 drivers/iommu/Kconfig                         |   1 +
 .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c   |  21 +-
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c   | 192 ++++++++++++++----
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h   |  16 +-
 drivers/iommu/io-pgtable-arm.c                | 119 ++++++++++-
 drivers/iommu/iommufd/hw_pagetable.c          |   3 +
 include/linux/io-pgtable.h                    |   4 +
 7 files changed, 307 insertions(+), 49 deletions(-)

-- 
2.34.1