On 12/6/25 7:52 AM, Tao Tang wrote:
Add a qtest suite that validates ARM SMMUv3 translation without guest firmware or OS. The tests leverage iommu-testdev to trigger DMA operations and the qos-smmuv3 library to configure IOMMU translation structures.This test suite targets the virt machine and covers: - Stage 1 only translation (VA -> PA via CD page tables) - Stage 2 only translation (IPA -> PA via STE S2 tables) - Nested translation (VA -> IPA -> PA, Stage 1 + Stage 2) - Design to extended to support multiple security spaces (Non-Secure, Secure, Root, Realm) Each test case follows this sequence: 1. Initialize SMMUv3 with appropriate command/event queues 2. Build translation tables (STE/CD/PTE) for the target scenario 3. Configure iommu-testdev with IOVA and DMA attributes via MMIO 4. Trigger DMA and validate successful translation 5. Verify data integrity through a deterministic write-read pattern This bare-metal approach provides deterministic IOMMU testing with minimal dependencies, making failures directly attributable to the SMMU translation path. Signed-off-by: Tao Tang <[email protected]> Tested-by: Pierrick Bouvier <[email protected]> Reviewed-by: Pierrick Bouvier <[email protected]> --- tests/qtest/iommu-smmuv3-test.c | 131 ++++++++++++++++++++++++++++++++ tests/qtest/meson.build | 1 + 2 files changed, 132 insertions(+) create mode 100644 tests/qtest/iommu-smmuv3-test.c
Looks great now! Tested again, and works as expected. Let's see if other people have additional comments on the series.
