(Bare) Metal Protocols

1. UEFI uefi

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ID: 533c2390-63c9-4cac-b0ff-2e7e93b4c60f
CREATED: <2025-03-08 Sat 01:06>

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[2025-03-08 Sat 01:07] – ~
[2025-03-08 Sat 01:09] – 22. EFI Byte Code Virtual Machine - UEFI Specification 2.11 documentation
[2025-03-09 Sun 20:56] – Uefi.inc - OSDev Wiki
[2025-03-09 Sun 20:57] – GNU-EFI - OSDev Wiki

Unified Extensible Firmware Interface

Supersedes BIOS in a similar manner to Wayland over X11 I suppose.. yet we prefer UEFI+X11 :)

1.1. EFI Stub

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ID: 60dea93a-8c06-4370-b89a-832a27772b9c
CREATED: <2026-05-18 Mon 20:39>

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[2026-05-18 Mon 20:39] – EFI boot stub - ArchWiki
[2026-05-18 Mon 20:43] – systemd-stub

1.1.1. UKI

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ID: 4e5188f6-e84c-4c48-a879-901426b73295
CREATED: <2026-05-18 Mon 20:38>
AKA: Unified Kernel Image

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[2026-05-18 Mon 20:38] – archwiki
[2026-05-18 Mon 20:43] – ukify
[2026-05-18 Mon 20:44] – UAPI.5 Unified Kernel Images | UAPI Group Specifications
[2026-05-18 Mon 20:45] >> UAPI Group

Unified Kernel Images (UKI) are a combination of an EFI stub, an initramfs, and further resources in a single UEFI PE file. This bundle of files can then easily be signed for use with secure boot.

1.2. OVMF

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ID: 6f908314-d6d8-471a-96c7-e388f6891fb0
CREATED: <2025-03-09 Sun 19:40>

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[2025-03-09 Sun 19:40] – OVMF - Xen
[2025-03-09 Sun 20:24] – faq

Open Virtual Machine Firmware

How to run OVMF · tianocore/tianocore.github.io Wiki

# sudo pacman -Sy edk2-ovmf
mkdir ovmf && cd ovmf
mkdir a
mv /usr/share/ovmf/x64/OVMF.4m.fd bios.bin
qemu-system-x86_64 -L . -pflash bios.bin -hda fat:rw:a -net none