Messages in this thread |  | | From | Lu Baolu <> | Subject | [PATCH RFC v3 00/12] iommu: SVA and IOPF refactoring | Date | Sun, 10 Apr 2022 18:24:31 +0800 |
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Hi folks,
The former part of this series refactors the IOMMU SVA code by assigning an SVA type of iommu_domain to a shared virtual address and replacing sva_bind/unbind iommu ops with attach/detach_dev_pasid domain ops.
The latter part changes the existing I/O page fault handling framework from only serving SVA to a generic one. Any driver or component could handle the I/O page faults for its domain in its own way by installing an I/O page fault handler.
This series overlaps with another series posted here [1]. For the convenience of review, I included all relevant patches in this series. We will solve the overlap problem later.
This series is also available on github here [2].
[1] https://lore.kernel.org/lkml/20220315050713.2000518-1-jacob.jun.pan@linux.intel.com/ [2] https://github.com/LuBaolu/intel-iommu/commits/iommu-sva-refactoring-v3
Please help review and suggest.
Best regards, baolu
Change log: v1: - https://lore.kernel.org/linux-iommu/20220320064030.2936936-1-baolu.lu@linux.intel.com/ - Initial post.
v2: - https://lore.kernel.org/linux-iommu/20220329053800.3049561-1-baolu.lu@linux.intel.com/ - Add sva domain life cycle management to avoid race between unbind and page fault handling. - Use a single domain for each mm. - Return a single sva handler for the same binding. - Add a new helper to meet singleton group requirement. - Rework the SVA domain allocation for arm smmu v3 driver and move the pasid_bit initialization to device probe. - Drop the patch "iommu: Handle IO page faults directly". - Add mmget_not_zero(mm) in SVA page fault handler.
v3: - Rework iommu_group_singleton_lockdown() by adding a flag to the group that positively indicates the group can never have more than one member, even after hot plug. - Abstract the data structs used for iommu sva in a separated patches to make it easier for review. - I still keep the RFC prefix in this series as above two significant changes need at least another round review to be finalized. - Several misc refinements.
Lu Baolu (12): iommu: Add pasid_bits field in struct dev_iommu iommu: Add a flag to indicate immutable singleton group iommu: Add attach/detach_dev_pasid domain ops iommu/sva: Basic data structures for SVA iommu/vt-d: Remove SVM_FLAG_SUPERVISOR_MODE support iommu/vt-d: Add SVA domain support arm-smmu-v3/sva: Add SVA domain support iommu/sva: Use attach/detach_pasid_dev in SVA interfaces iommu: Remove SVA related callbacks from iommu ops iommu: Prepare IOMMU domain for IOPF iommu: Per-domain I/O page fault handling iommu: Rename iommu-sva-lib.{c,h}
include/linux/intel-iommu.h | 5 +- include/linux/iommu.h | 107 ++++-- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 25 +- .../iommu/{iommu-sva-lib.h => iommu-sva.h} | 8 +- .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 85 ++--- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 28 +- drivers/iommu/intel/iommu.c | 20 +- drivers/iommu/intel/svm.c | 135 +++---- drivers/iommu/io-pgfault.c | 71 +--- drivers/iommu/iommu-sva-lib.c | 71 ---- drivers/iommu/iommu-sva.c | 331 ++++++++++++++++++ drivers/iommu/iommu.c | 239 +++++++------ drivers/iommu/Makefile | 2 +- 13 files changed, 706 insertions(+), 421 deletions(-) rename drivers/iommu/{iommu-sva-lib.h => iommu-sva.h} (88%) delete mode 100644 drivers/iommu/iommu-sva-lib.c create mode 100644 drivers/iommu/iommu-sva.c
-- 2.25.1
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