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Viewing file:     K99microcode_ctl (1.88 KB)      -rwxr-xr-x

#!/bin/bash
# chkconfig: 2345 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

DEVICE=/dev/cpu/microcode
ARGUMENTS=-Qu
RETVAL=0
PROGRAM=/sbin/microcode_ctl
DATAFILE=/etc/firmware/microcode.dat

. /etc/init.d/functions

RETVAL=0

# perform the update
function start ()
{
	RETVAL=1
	# Make sure we are on an Intel machine
	vendor=`grep "^vendor_id" /proc/cpuinfo | head -n1 | awk -F ": " '{ print $2 }'`
	[ "$vendor" != "GenuineIntel" ] && return

	# Microcode wasn't available until 686's.
	family=`grep "^cpu family" /proc/cpuinfo | head -n1 | awk -F ": " '{ print $2 }'`
	[ $family -lt 6 ] && return

	echo -n $"Applying Intel CPU microcode update: "

	if [ ! -e $DATAFILE ]; then 
		echo $"$0: CPU microcode data file not present ($DATAFILE)"
		exit 1
	fi

	/sbin/modprobe microcode

	lt=0
	while [ ! -c $DEVICE ]; do
		lt=$[lt+1];
		[ $lt -gt 5 ] && break;
		sleep 1;
	done

	# Lets just be sure we have a device file...
	if [ ! -e $DEVICE ]; then
		echo $"$0: microcode device $DEVICE doesn't exist?"
		exit 1
	elif [ ! -c $DEVICE ]; then
		echo $"$0: $DEVICE not a character device?"
		exit 1
	fi

	daemon $PROGRAM $ARGUMENTS
	RETVAL=$?

	# trap the most common case, errno 19 = no device
	if [ $RETVAL -eq 19 ]; then
		echo $"$0: kernel does not have CPU microcode device support"
	fi
	/sbin/rmmod 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 $?