Balaji Masanamuthu Chinnathurai comments

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                                            Balaji Masanamuthu Chinnathurai

TDX: Support VTL0 IOMMU posted interrupts + interrupt relay

> Can you rebase this change onto the latest main so I can review again? Done

TDX: Support VTL0 IOMMU posted interrupts + interrupt relay

> When do we unwind/unmap the interrupts? What does the guest do and what do we do in response? The guest can only issue retarget calls, and no unmapping calls....

TDX: Support VTL0 IOMMU posted interrupts + interrupt relay

Results from local testing shows expected results. Test config: 256VP, 512GB memory, NVMe DDA drive attached to VTL0 Guest build: Windows (29493 rs_prerelease), Linux (Ubuntu 24.04) FIO (linux) & Diskspd...

tdx: use timer virtualization for lower VTLs

> looks reasonable but i want to also have @smalis-msft review. We also use this timer for VTL1 - have you tested that? @chris-oo Yes, we validated with VTL1 enabled...

tdx: Implement timer virtualization support using TDX L2 TSC deadline service

Design proposed by @jstarks: - openvmm usermode would avoid using existing IO-uring timeouts for VTL0 timers and instead communicate the deadline to the kernel (mshv_vtl driver) via shared page. -...