linux-toradex.git/tools/testing/selftests/vfio/lib/include, branch master

vfio: selftests: Align BAR mmaps for efficient IOMMU mapping

2026-01-19T17:06:30+00:00

Update vfio_pci_bar_map() to align BAR mmaps for efficient huge page
mappings. The manual mmap alignment can be removed once mmap(!MAP_FIXED)
on vfio device fds improves to automatically return well-aligned
addresses.

Also add MADV_HUGEPAGE, which encourages the kernel to use huge pages
(e.g. when /sys/kernel/mm/transparent_hugepage/enabled is set to "madvise").

Drop MAP_FILE from mmap(). It is an ignored compatibility flag.

Signed-off-by: Alex Mastro 
Reviewed-by: David Matlack 
Tested-by: David Matlack 
Link: https://lore.kernel.org/r/20260114-map-mmio-test-v3-2-44e036d95e64@fb.com
Signed-off-by: Alex Williamson

vfio: selftests: Centralize IOMMU mode name definitions

2026-01-19T17:06:29+00:00

Replace scattered string literals with MODE_* macros in iommu.h. This
provides a single source of truth for IOMMU mode name strings.

Signed-off-by: Alex Mastro 
Reviewed-by: David Matlack 
Tested-by: David Matlack 
Link: https://lore.kernel.org/r/20260114-map-mmio-test-v3-1-44e036d95e64@fb.com
Signed-off-by: Alex Williamson

vfio: selftests: Drop includes

2025-12-23T21:17:13+00:00

Drop the  includes now that 
(tools/include/linux/types.h) has a definition for __aligned_le64, which
is needed by .

Including  is harmless but causes benign typedef
redefinitions. This is not a problem for VFIO selftests but becomes an
issue when the VFIO selftests library is built into KVM selftests, since
they are built with -std=gnu99 which does not allow typedef redifitions.

No functional change intended.

Signed-off-by: David Matlack 
Link: https://lore.kernel.org/r/20251219233818.1965306-3-dmatlack@google.com
Signed-off-by: Alex Williamson

vfio: selftests: Eliminate INVALID_IOVA

2025-11-28T17:58:07+00:00

Eliminate INVALID_IOVA as there are platforms where UINT64_MAX is a
valid iova.

Reviewed-by: Alex Mastro 
Tested-by: Alex Mastro 
Reviewed-by: Raghavendra Rao Ananta 
Signed-off-by: David Matlack 
Link: https://lore.kernel.org/r/20251126231733.3302983-18-dmatlack@google.com
Signed-off-by: Alex Williamson

vfio: selftests: Split libvfio.h into separate header files

2025-11-28T17:58:07+00:00

Split out the contents of libvfio.h into separate header files, but keep
libvfio.h as the top-level include that all tests can use.

Put all new header files into a libvfio/ subdirectory to avoid future
name conflicts in include paths when libvfio is used by other selftests
like KVM.

No functional change intended.

Reviewed-by: Alex Mastro 
Tested-by: Alex Mastro 
Reviewed-by: Raghavendra Rao Ananta 
Signed-off-by: David Matlack 
Link: https://lore.kernel.org/r/20251126231733.3302983-17-dmatlack@google.com
Signed-off-by: Alex Williamson

vfio: selftests: Rename vfio_util.h to libvfio.h

2025-11-28T17:58:07+00:00

Rename vfio_util.h to libvfio.h to match the name of libvfio.mk.

No functional change intended.

Reviewed-by: Alex Mastro 
Tested-by: Alex Mastro 
Reviewed-by: Raghavendra Rao Ananta 
Signed-off-by: David Matlack 
Link: https://lore.kernel.org/r/20251126231733.3302983-15-dmatlack@google.com
Signed-off-by: Alex Williamson

vfio: selftests: Stop passing device for IOMMU operations

2025-11-28T17:58:06+00:00

Drop the struct vfio_pci_device wrappers for IOMMU map/unmap functions
and require tests to directly call iommu_map(), iommu_unmap(), etc. This
results in more concise code, and also makes it clear the map operations
are happening on a struct iommu, not necessarily on a specific device,
especially when multi-device tests are introduced.

Do the same for iova_allocator_init() as that function only needs the
struct iommu, not struct vfio_pci_device.

Reviewed-by: Alex Mastro 
Tested-by: Alex Mastro 
Reviewed-by: Raghavendra Rao Ananta 
Signed-off-by: David Matlack 
Link: https://lore.kernel.org/r/20251126231733.3302983-14-dmatlack@google.com
Signed-off-by: Alex Williamson

vfio: selftests: Move IOMMU library code into iommu.c

2025-11-28T17:58:06+00:00

Move all the IOMMU related library code into their own file iommu.c.
This provides a better separation between the vfio_pci_device helper
code and the iommu code.

No function change intended.

Reviewed-by: Alex Mastro 
Tested-by: Alex Mastro 
Reviewed-by: Raghavendra Rao Ananta 
Signed-off-by: David Matlack 
Link: https://lore.kernel.org/r/20251126231733.3302983-12-dmatlack@google.com
Signed-off-by: Alex Williamson

vfio: selftests: Rename struct vfio_dma_region to dma_region

2025-11-28T17:58:06+00:00

Rename struct vfio_dma_region to dma_region. This is in preparation for
separating the VFIO PCI device library code from the IOMMU library code.
This name change also better reflects the fact that DMA mappings can be
managed by either VFIO or IOMMUFD. i.e. the "vfio_" prefix is
misleading.

Reviewed-by: Alex Mastro 
Tested-by: Alex Mastro 
Reviewed-by: Raghavendra Rao Ananta 
Signed-off-by: David Matlack 
Link: https://lore.kernel.org/r/20251126231733.3302983-11-dmatlack@google.com
Signed-off-by: Alex Williamson

vfio: selftests: Prefix logs with device BDF where relevant

2025-11-28T17:58:06+00:00

Prefix log messages with the device's BDF where relevant. This will help
understanding VFIO selftests logs when tests are run with multiple
devices.

Reviewed-by: Alex Mastro 
Tested-by: Alex Mastro 
Reviewed-by: Raghavendra Rao Ananta 
Signed-off-by: David Matlack 
Link: https://lore.kernel.org/r/20251126231733.3302983-9-dmatlack@google.com
Signed-off-by: Alex Williamson