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Mathieu Benoit 8c7d8f52a9 [UPD] hoist jinja2 ahead of systemd 
systemd generates source from jinja2 templates, and the Python set sits at the
end of packages.sh while systemd is in the middle. The list order is the runtime
closure, not the build order -- so the packages that must exist before another
one builds are named in STAGE2_FIRST rather than moved.

--- FR ---

systemd genere du code depuis des gabarits jinja2, et l ensemble Python figure en
fin de packages.sh quand systemd est au milieu. L ordre de la liste est la
fermeture d execution, pas celle de construction : les paquets qui doivent
exister avant qu un autre se batisse sont nommes dans STAGE2_FIRST plutot que
deplaces.

Assisted-by: Claude Opus 5
2026-08-23 18:00:35 -04:00
.github/workflows making the house a home 2026-01-27 23:26:31 +01:00
arch-kernel making the house a home 2026-01-27 23:26:31 +01:00
boot making the house a home 2026-01-27 23:26:31 +01:00
patches [ADD] gnupg without its diagrams, and jinja2 for systemd 2026-08-23 17:25:27 -04:00
scripts [UPD] hoist jinja2 ahead of systemd 2026-08-23 18:00:35 -04:00
.env.example [ADD] upstream.lock, and keep the machine out of the repository 2026-08-22 22:52:04 -04:00
.gitignore making the house a home 2026-01-27 23:26:31 +01:00
CODEOWNERS making the house a home 2026-01-27 23:26:31 +01:00
Containerfile making the house a home 2026-01-27 23:26:31 +01:00
LICENSE use arch kernel patches 2025-06-02 21:53:33 +02:00
Makefile making the house a home 2026-01-27 23:26:31 +01:00
README.md making the house a home 2026-01-27 23:26:31 +01:00
RELAIS.md [ADD] upstream.lock, and keep the machine out of the repository 2026-08-22 22:52:04 -04:00
TODO.md [FIX] help2man was uninstallable, which stopped the whole pass 2026-08-21 00:33:07 -04:00

README.md

Arch Linux s390x

A port of Arch Linux to IBM s390x mainframe architecture with systemd support.

Boots a full Arch Linux system on IBM mainframes (or QEMU s390x emulation) using a hybrid build: cross-compilation for the kernel, native s390x compilation on z/VM for userspace.

Quick Start

make container        # build dev container (first time)
cp .env.example .env  # configure z/VM access
make all              # build kernel + initramfs + systemd
make test-systemd     # boot it

What Works

  • Arch Linux kernel 6.18.6-arch1 with Arch patches, cross-compiled
  • Initramfs via modified mkinitcpio
  • Static busybox built natively on z/VM, 2.3MB
  • Root filesystem with ext4, switch_root to real rootfs
  • Systemd as PID 1

Pacman, bash, and GNU coreutils are not yet ported.

Build System

The build uses two tiers:

Cross-compilation (x86_64 host): Kernel is built in a Fedora 43 container with s390x-linux-gnu-gcc. Initramfs is generated with a patched mkinitcpio that handles cross-architecture binary injection.

Native compilation (s390x z/VM): Busybox and systemd must be built on real s390x hardware. The z/VM system runs RHEL 9.6 with GCC 11.5.0. Scripts handle SSH deployment and retrieval automatically via .env configuration.