Add willamhou/hypervisor (ARM64 Rust bare-metal Type-1)

[willamhou]

What

willamhou/hypervisor — an ARM64 Type-1 bare-metal hypervisor written in Rust (no_std), targeting QEMU virt machine.

Why it belongs here

The awesome-virtualization list is heavily x86-focused. This project fills the ARM64 gap with a from-scratch hypervisor that runs at EL2 and implements real Arm firmware interfaces.

Key features

• S-EL2 SPMC: replaces Hafnium as the Secure Partition Manager Core (BL32), boots Secure Partitions at S-EL1
• pKVM coexistence: runs alongside Android pKVM (NS-EL2) in the same TF-A boot chain — 35/35 E2E FF-A tests pass via ffa_test.ko
• FF-A v1.1: full proxy + SPMC implementation — DIRECT_REQ, MEM_SHARE/LEND/DONATE/RETRIEVE/RELINQUISH/RECLAIM, PARTITION_INFO_GET, notifications, indirect messaging, SP-to-SP routing with cycle detection
• Linux guest: boots Linux 6.12.12 to BusyBox shell with 4 vCPUs, virtio-blk, virtio-net, GICv3 emulation
• Multi-VM: 2 Linux VMs time-sliced with per-VM Stage-2, VMID-tagged TLBs, L2 virtual switch
• 457 test assertions across 34 test suites, 20/20 BL33 integration tests