The framework allows callable implementation of IO page table. This allows AMD IOMMU driver to switch between different types of AMD IOMMU page tables (e.g. v1 vs. v2).
This series refactors the current implementation of AMD IOMMU v1 page table to adopt the framework. There should be no functional change. Subsequent series will introduce support for the AMD IOMMU v2 page table. Thanks, Suravee Change from V1 (https://lkml.org/lkml/2020/9/23/251) - Do not specify struct io_pgtable_cfg.coherent_walk, since it is not currently used. (per Robin) - Remove unused struct iommu_flush_ops. (patch 2/13) - Move amd_iommu_setup_io_pgtable_ops to iommu.c instead of io_pgtable.c patch 13/13) Suravee Suthikulpanit (13): iommu/amd: Re-define amd_iommu_domain_encode_pgtable as inline iommu/amd: Prepare for generic IO page table framework iommu/amd: Move pt_root to to struct amd_io_pgtable iommu/amd: Convert to using amd_io_pgtable iommu/amd: Declare functions as extern iommu/amd: Move IO page table related functions iommu/amd: Restructure code for freeing page table iommu/amd: Remove amd_iommu_domain_get_pgtable iommu/amd: Rename variables to be consistent with struct io_pgtable_ops iommu/amd: Refactor fetch_pte to use struct amd_io_pgtable iommu/amd: Introduce iommu_v1_iova_to_phys iommu/amd: Introduce iommu_v1_map_page and iommu_v1_unmap_page iommu/amd: Adopt IO page table framework drivers/iommu/amd/Kconfig | 1 + drivers/iommu/amd/Makefile | 2 +- drivers/iommu/amd/amd_iommu.h | 22 + drivers/iommu/amd/amd_iommu_types.h | 40 +- drivers/iommu/amd/io_pgtable.c | 534 +++++++++++++++++++++++ drivers/iommu/amd/iommu.c | 644 +++------------------------- drivers/iommu/io-pgtable.c | 3 + include/linux/io-pgtable.h | 2 + 8 files changed, 656 insertions(+), 592 deletions(-) create mode 100644 drivers/iommu/amd/io_pgtable.c -- 2.17.1
