microcode_ctl/microcode_ctl.init

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#!/bin/bash
# chkconfig: - 0 99
# description: script to apply cpu microcode
# vars:
#
# START distribution specific way of kicking programs
# END distribution specific way of checking return status
# PROGRAM the executable to run
# ARGUMENTS the argument we're going to call PROGRAM with
# Check that we're a priviledged user
[ `id -u` = 0 ] || exit 0
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DEVICE=/dev/cpu/microcode
ARGUMENTS=-Qu
RETVAL=0
PROGRAM=/sbin/microcode_ctl
if [ ! -e /etc/firmware/microcode.dat ]; then
echo $"$0: microcode datafile not present (/etc/firmware/microcode.dat)"
exit 1
fi
. /etc/init.d/functions
RETVAL=0
# perform the update
function start ()
{
RETVAL=1
# Make sure we are on an intel machine
vendor=`cat /proc/cpuinfo | grep "^vendor_id" | sort -u | awk -F ": " '{ print $2 }'`
[ "$vendor" != "GenuineIntel" ] && return
# Microcode wasn't available until 686's.
family=`cat /proc/cpuinfo | grep "^cpu family" | sort -u | awk -F ": " '{ print $2 }'`
[ $family -lt 6 ] && return
echo -n $"Applying Intel Microcode update: "
/sbin/modprobe microcode
if [ ! -d /dev/cpu ]; then
mkdir /dev/cpu
fi
/bin/mknod /dev/cpu/microcode c 10 184
daemon $PROGRAM $ARGUMENTS
RETVAL=$?
# trap the most common case, errno 19 = no device
if [ $RETVAL -eq 19 ]; then
echo $"$0: kernel does not have microcode device support"
fi
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/sbin/rmmod microcode
rm -f /dev/cpu/microcode
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/microcode_ctl
return $RETVAL
}
stop()
{
rm -f /var/lock/subsys/microcode_ctl
}
case "$1" in
start)
start
exit 0
;;
stop)
stop
;;
restart|reload|force-reload)
stop
start
;;
status)
;;
*)
echo $"Usage: $0 {start|stop|restart}"
exit 1
esac
exit $?