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#!/bin/sh
# amd64-microcode initramfs-tools hook script
# Copyright (C) 2012,2013 Henrique de Moraes Holschuh <hmh@debian.org>
# Released under the GPL v2 or later license
#
# Generates a copy of the minimal microcode for the current system if
# possible, and installs it in the initramfs.
#
PREREQ=""
prereqs()
{
echo "$PREREQ"
}
case $1 in
prereqs)
prereqs
exit 0
;;
esac
. /usr/share/initramfs-tools/hook-functions
verbose()
{
if [ "${verbose}" = "y" ] ; then
echo "amd64-microcode: $@"
fi
:
}
AUCODE_FW_DIR=/lib/firmware/amd-ucode
if [ ! -d "${AUCODE_FW_DIR}" ] ; then
verbose "no AMD64 processor microcode datafiles to install"
exit 0;
fi
if grep -q "^vendor_id[[:blank:]]*:[[:blank:]]*.*AuthenticAMD" /proc/cpuinfo || [ "$MODULES" = "most" ]; then
# See Debian bug #716917. Blacklist all non-LTS/non-Debian kernel versions
# before kernel 3.4 Only known-bad kernel is 2.6.38.
#
# This doesn't blacklist early kernels in the LTS branches, we don't have enough
# information at the initramfs-tools layer, due to the way Debian and Ubuntu version
# kernel packages.
if dpkg --compare-versions ${version} le 3.4 && \
{ dpkg --compare-versions ${version} lt 2.6.32 || \
{ dpkg --compare-versions ${version} ge 2.6.33 && dpkg --compare-versions ${version} lt 3.0 ; } || \
{ dpkg --compare-versions ${version} ge 3.1 && dpkg --compare-versions ${version} lt 3.2 ; } || \
dpkg --compare-versions ${version} ge 3.3 ; \
}; then
echo "E: amd64-microcode: unsupported kernel version!" >&2
exit 0
fi
verbose "installing all microcode datafiles for AMD64 processors"
# Generate firmware dir
mkdir -m 755 -p "${DESTDIR}${AUCODE_FW_DIR}" || true
cp -fr "${AUCODE_FW_DIR}/." "${DESTDIR}${AUCODE_FW_DIR}/."
if ! rmdir "${DESTDIR}${AUCODE_FW_DIR}" 2>/dev/null ; then
# The directory was not empty, so we have work to do
verbose "installing AMD64 processor microcode update support into initramfs..."
force_load microcode
fi
fi
: