UefiTestingPkg: SmmuV3 DMA Protection Audit Tests

[Eeshan Londhe (eeshanl)]

Description

Add SmmuV3 DMA Protection Audit Tests

Extends the DMA Protection Audit suite (previously VT-d and IVRS only) with an AArch64 DMASmmuProtectionUnitTestApp that plugs SMMUv3-specific implementations into the existing shared test entry point. The app parses the IORT (EFI_ACPI_6_0_IO_REMAPPING_TABLE_SIGNATURE) to enumerate SMMUv3 nodes and their Reserved Memory Range (RMR) associations, then registers three test cases:

1. CheckIOMMUEnabled - IOMMU.StatusRegister
   For each SMMUv3 unit discovered in the IORT, verifies the unit is in a DMA-safe state.
   If translation is on (CR0.SMMUEN == 1), the test additionally confirms:
   CR0.CMDQEN == 1 (command queue enabled)
   CR0.EVTQEN == 1 (event queue enabled)
   STRTAB_BASE != 0 (stream table configured)
   GERROR == 0 (no global errors)

2. CheckExcludedRegions - IOMMU.ExcludedRangeTest
   SMMU equivalent of the VT-d / IVRS "excluded regions" check. Walks every RMR node in the IORT and, for each one, verifies:
   An EFI memory map descriptor fully encompasses the RMR's [BaseAddress, BaseAddress + Length) range, and
   That descriptor's memory type is EfiReservedMemoryType.
   An RMR that is missing from the memory map, or is present but marked with a non-reserved type, fails the test. Platforms with no RMRs in the IORT pass trivially.

3. CheckBMETeardown - IOMMU.BMETeardown (shared)
   Unchanged behavior - the existing "bus mastering disabled at ExitBootServices" test is reused as-is. Test registration order was adjusted so this reboot-triggering test runs last, and a PASSED log line was added on the success path.

For details on how to complete these options and their meaning refer to CONTRIBUTING.md.

• Impacts functionality?
• Impacts security?
• Breaking change?
• Includes tests?
• Includes documentation?

How This Was Tested

Tested on physical ARM device

Integration Instructions

N/A

[mu-automation]

This PR has been automatically marked as stale because it has not had activity in 60 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions.

[mu-automation]

This pull request has been automatically been closed because it did not have any activity in 60 days and no follow up within 7 days after being marked stale. Thank you for your contributions.

[mu-automation]

✅ QEMU Validation Passed

Source Dependencies

Repository	Commit
mu_plus	62575d1
mu_tiano_platforms	b15d1f8

Results

Platform	Target	Build	Boot	Overall Boot Time	Build Logs	Boot Logs
Q35	DEBUG	✅ success	✅ success	0m 20s	Build Logs	Boot Logs
ArmVirt	DEBUG	✅ success	✅ success	0m 14s	Build Logs	Boot Logs

Workflow run: https://github.com/microsoft/mu_plus/actions/runs/30850786272

This comment was automatically generated by the Mu QEMU PR Validation workflow.

[mu-automation]

This PR has been automatically marked as stale because it has not had activity in 60 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions.