[PATCH v3 00/18] vfio: selftests: Support for multi-device tests

David Matlack
2025-11-21T18:14:39Z

This series adds support for tests that use multiple devices, and adds
one new test, vfio_pci_device_init_perf_test, which measures parallel
device initialization time to demonstrate the improvement from commit
e908f58b6beb ("vfio/pci: Separate SR-IOV VF dev_set").

This series also breaks apart the monolithic vfio_util.h and
vfio_pci_device.c into separate files, to account for all the new code.
This required quite a bit of code motion so the diffstat looks large.
The final layout is more granular and provides a better separation of
the IOMMU code from the device code.

Final layout:

C files:
- tools/testing/selftests/vfio/lib/libvfio.c
- tools/testing/selftests/vfio/lib/iommu.c
- tools/testing/selftests/vfio/lib/iova_allocator.c
- tools/testing/selftests/vfio/lib/vfio_pci_device.c
- tools/testing/selftests/vfio/lib/vfio_pci_driver.c

H files:
- tools/testing/selftests/vfio/lib/include/libvfio.h
- tools/testing/selftests/vfio/lib/include/libvfio/assert.h
- tools/testing/selftests/vfio/lib/include/libvfio/iommu.h
- tools/testing/selftests/vfio/lib/include/libvfio/iova_allocator.h
- tools/testing/selftests/vfio/lib/include/libvfio/vfio_pci_device.h
- tools/testing/selftests/vfio/lib/include/libvfio/vfio_pci_driver.h

Notably, vfio_util.h is now gone and replaced with libvfio.h.

This series is based on vfio/next plus Alex Mastro's series to add the
IOVA allocator [1]. It should apply cleanly to vfio/next once Alex's
series is merged by Linus into the next 6.18 rc and then merged into
vfio/next.

This series can be found on GitHub:

https://github.com/dmatlack/linux/tree/vfio/selftests/init_perf_test/v3

[1] https://lore.kernel.org/kvm/20251111-iova-ranges-v3-0-7960244642c5@fb.com/

Cc: Alex Mastro <amastro@fb.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Josh Hilke <jrhilke@google.com>
Cc: Raghavendra Rao Ananta <rananta@google.com>
Cc: Vipin Sharma <vipinsh@google.com>

v3:
- Replace literal with NSEC_PER_SEC (Alex Mastro)
- Fix Makefile accumulate vs. assignment (Alex Mastro)

v2: https://lore.kernel.org/kvm/20251112192232.442761-1-dmatlack@google.com/

v1: https://lore.kernel.org/kvm/20251008232531.1152035-1-dmatlack@google.com/

David Matlack (18):
vfio: selftests: Move run.sh into scripts directory
vfio: selftests: Split run.sh into separate scripts
vfio: selftests: Allow passing multiple BDFs on the command line
vfio: selftests: Rename struct vfio_iommu_mode to iommu_mode
vfio: selftests: Introduce struct iommu
vfio: selftests: Support multiple devices in the same
container/iommufd
vfio: selftests: Eliminate overly chatty logging
vfio: selftests: Prefix logs with device BDF where relevant
vfio: selftests: Upgrade driver logging to dev_err()
vfio: selftests: Rename struct vfio_dma_region to dma_region
vfio: selftests: Move IOMMU library code into iommu.c
vfio: selftests: Move IOVA allocator into iova_allocator.c
vfio: selftests: Stop passing device for IOMMU operations
vfio: selftests: Rename vfio_util.h to libvfio.h
vfio: selftests: Move vfio_selftests_*() helpers into libvfio.c
vfio: selftests: Split libvfio.h into separate header files
vfio: selftests: Eliminate INVALID_IOVA
vfio: selftests: Add vfio_pci_device_init_perf_test

tools/testing/selftests/vfio/Makefile | 10 +-
.../selftests/vfio/lib/drivers/dsa/dsa.c | 36 +-
.../selftests/vfio/lib/drivers/ioat/ioat.c | 18 +-
.../selftests/vfio/lib/include/libvfio.h | 26 +
.../vfio/lib/include/libvfio/assert.h | 54 ++
.../vfio/lib/include/libvfio/iommu.h | 76 +++
.../vfio/lib/include/libvfio/iova_allocator.h | 23 +
.../lib/include/libvfio/vfio_pci_device.h | 125 ++++
.../lib/include/libvfio/vfio_pci_driver.h | 97 +++
.../selftests/vfio/lib/include/vfio_util.h | 331 -----------
tools/testing/selftests/vfio/lib/iommu.c | 465 +++++++++++++++
.../selftests/vfio/lib/iova_allocator.c | 94 +++
tools/testing/selftests/vfio/lib/libvfio.c | 78 +++
tools/testing/selftests/vfio/lib/libvfio.mk | 5 +-
.../selftests/vfio/lib/vfio_pci_device.c | 555 +-----------------
.../selftests/vfio/lib/vfio_pci_driver.c | 16 +-
tools/testing/selftests/vfio/run.sh | 109 ----
.../testing/selftests/vfio/scripts/cleanup.sh | 41 ++
tools/testing/selftests/vfio/scripts/lib.sh | 42 ++
tools/testing/selftests/vfio/scripts/run.sh | 16 +
tools/testing/selftests/vfio/scripts/setup.sh | 48 ++
.../selftests/vfio/vfio_dma_mapping_test.c | 46 +-
.../selftests/vfio/vfio_iommufd_setup_test.c | 2 +-
.../vfio/vfio_pci_device_init_perf_test.c | 168 ++++++
.../selftests/vfio/vfio_pci_device_test.c | 12 +-
.../selftests/vfio/vfio_pci_driver_test.c | 51 +-
26 files changed, 1481 insertions(+), 1063 deletions(-)
create mode 100644 tools/testing/selftests/vfio/lib/include/libvfio.h
create mode 100644 tools/testing/selftests/vfio/lib/include/libvfio/assert.h
create mode 100644 tools/testing/selftests/vfio/lib/include/libvfio/iommu.h
create mode 100644 tools/testing/selftests/vfio/lib/include/libvfio/iova_allocator.h
create mode 100644 tools/testing/selftests/vfio/lib/include/libvfio/vfio_pci_device.h
create mode 100644 tools/testing/selftests/vfio/lib/include/libvfio/vfio_pci_driver.h
delete mode 100644 tools/testing/selftests/vfio/lib/include/vfio_util.h
create mode 100644 tools/testing/selftests/vfio/lib/iommu.c
create mode 100644 tools/testing/selftests/vfio/lib/iova_allocator.c
create mode 100644 tools/testing/selftests/vfio/lib/libvfio.c
delete mode 100755 tools/testing/selftests/vfio/run.sh
create mode 100755 tools/testing/selftests/vfio/scripts/cleanup.sh
create mode 100755 tools/testing/selftests/vfio/scripts/lib.sh
create mode 100755 tools/testing/selftests/vfio/scripts/run.sh
create mode 100755 tools/testing/selftests/vfio/scripts/setup.sh
create mode 100644 tools/testing/selftests/vfio/vfio_pci_device_init_perf_test.c

base-commit: fa804aa4ac1b091ef2ec2981f08a1c28aaeba8e7
prerequisite-patch-id: dcf23dcc1198960bda3102eefaa21df60b2e4c54
prerequisite-patch-id: e32e56d5bf7b6c7dd40d737aa3521560407e00f5
prerequisite-patch-id: 4f79a41bf10a4c025ba5f433551b46035aa15878
prerequisite-patch-id: f903a45f0c32319138cd93a007646ab89132b18c
--
2.52.0.rc2.455.g230fcf2819-goog