On Wed, 14 Jan 2026 10:57:15 -0800 Alex Mastro <[email protected]> wrote:
> Test IOMMU mapping the BAR mmaps created during vfio_pci_device_setup(). > > All IOMMU modes are tested: vfio_type1 variants are expected to succeed, > while non-type1 modes are expected to fail. iommufd compat mode can be > updated to expect success once kernel support lands. Native iommufd will > not support mapping vaddrs backed by MMIO (it will support dma-buf based > MMIO mapping instead). > > Changes in v3: > - Rename mmap_aligned() to mmap_reserve() > - Reorder variable declarations for reverse-fir-tree style > - Update patch 2 commit message to mention MADV_HUGEPAGE and MAP_FILE > - Move BAR size check into map_partial_bar test only > - Link to v2: > https://lore.kernel.org/r/[email protected] > > Changes in v2: > - Split into patch series > - Factor out mmap_reserve() for vaddr alignment > - Align BAR mmaps to improve hugepage IOMMU mapping efficiency > - Centralize MODE_* string definitions > - Add is_power_of_2() assertion for BAR size > - Simplify align calculation to min(size, 1G) > - Add map_bar_misaligned test case > - Link to v1: > https://lore.kernel.org/all/20260107-scratch-amastro-vfio-dma-mapping-mmio-test-v1-1-0cec5e9ec...@fb.com > > Signed-off-by: Alex Mastro <[email protected]> > > --- > Alex Mastro (3): > vfio: selftests: Centralize IOMMU mode name definitions > vfio: selftests: Align BAR mmaps for efficient IOMMU mapping > vfio: selftests: Add vfio_dma_mapping_mmio_test > > tools/testing/selftests/vfio/Makefile | 1 + > tools/testing/selftests/vfio/lib/include/libvfio.h | 9 ++ > .../selftests/vfio/lib/include/libvfio/iommu.h | 6 + > tools/testing/selftests/vfio/lib/iommu.c | 12 +- > tools/testing/selftests/vfio/lib/libvfio.c | 25 ++++ > tools/testing/selftests/vfio/lib/vfio_pci_device.c | 24 +++- > .../selftests/vfio/vfio_dma_mapping_mmio_test.c | 143 > +++++++++++++++++++++ > .../testing/selftests/vfio/vfio_dma_mapping_test.c | 2 +- > 8 files changed, 214 insertions(+), 8 deletions(-) > --- > base-commit: d721f52e31553a848e0e9947ca15a49c5674aef3 > change-id: 20260112-map-mmio-test-b4e4c2d917a9 > > Best regards, Applied to vfio next branch for v6.20/7.0. Thanks, Alex
