6fc794dceb
PCI IRQ checker: MSI-X capability detection, spurious IRQ accounting, interrupt affinity probe using redox-driver-sys IrqHandle IOMMU checker: vendor detection (AMD-Vi/Intel VT-d), control-scheme unit initialization probe, event drain probe, wire-format tests Unified harness: test-irq-runtime.sh (guest + QEMU modes) following Phase 1-5 pattern — exit-code-based, explicit binary checks Zero warnings, all tests pass.