vfio: selftests: Add vfio_dma_mapping_mmio_test

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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).

Signed-off-by: Alex Mastro <amastro@fb.com>
Reviewed-by: David Matlack <dmatlack@google.com>
Tested-by: David Matlack <dmatlack@google.com>
Link: https://lore.kernel.org/r/20260114-map-mmio-test-v3-3-44e036d95e64@fb.com
Signed-off-by: Alex Williamson <alex@shazbot.org>

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Alex Mastro 2026-01-14 10:57:18 -08:00 • committed by Alex Williamson

parent 557dbdf6c4

commit 080723f4d4

2 changed files with 144 additions and 0 deletions

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tools/testing/selftests/vfio/Makefile

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143

tools/testing/selftests/vfio/vfio_dma_mapping_mmio_test.c

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