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#!/usr/bin/env bash
# Copyright 2024 Gentoo Authors
# This script is installed by sys-kernel/linux-firmware, it is executed by
# the traditional installkernel, NOT by systemd's kernel-install. I.e. this
# plugin is run when the systemd USE flag is disabled or
# SYSTEMD_KERNEL_INSTALL=0 is set in the environment.
# familiar helpers, we intentionally don't use Gentoo functions.sh
die() {
echo -e " ${NOCOLOR-\e[1;31m*\e[0m }${*}" >&2
exit 1
}
einfo() {
echo -e " ${NOCOLOR-\e[1;32m*\e[0m }${*}" >&2
}
main() {
# re-define for subst to work
[[ -n ${NOCOLOR+yes} ]] && NOCOLOR=
if [[ ${INSTALLKERNEL_INITRD_GENERATOR} == dracut ]]; then
# Dracut bundles microcode in its initramfs images
echo "initrd_generator=${INSTALLKERNEL_INITRD_GENERATOR} bundles CPU microcode, nothing to do here."
exit 0
fi
# do nothing if somehow make-amd-ucode-img is not installed
[[ -x $(command -v make-amd-ucode-img) ]] || die "make-amd-ucode-img command not available"
[[ ${EUID} -eq 0 ]] || die "Please run this script as root"
einfo "Generating AMD CPU Microcode early initramfs image..."
make-amd-ucode-img /boot/amd-uc.img /lib/firmware/amd-ucode ||
die "make-amd-ucode-img failed"
}
main
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