101 lines
1.9 KiB
Bash
Executable File
101 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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# chkconfig: 2345 0 99
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# description: script to apply cpu microcode
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# vars:
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#
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# START distribution specific way of kicking programs
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# END distribution specific way of checking return status
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# PROGRAM the executable to run
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# ARGUMENTS the argument we're going to call PROGRAM with
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# Check that we're a priviledged user
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[ `id -u` = 0 ] || exit 0
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DEVICE=/dev/cpu/microcode
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ARGUMENTS=-Qu
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RETVAL=0
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PROGRAM=/sbin/microcode_ctl
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DATAFILE=/etc/firmware/microcode.dat
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. /etc/init.d/functions
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RETVAL=0
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# perform the update
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function start ()
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{
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RETVAL=1
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# Make sure we are on an Intel machine
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vendor=`grep "^vendor_id" /proc/cpuinfo | head -n1 | awk -F ": " '{ print $2 }'`
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[ "$vendor" != "GenuineIntel" ] && return
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# Microcode wasn't available until 686's.
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family=`grep "^cpu family" /proc/cpuinfo | head -n1 | awk -F ": " '{ print $2 }'`
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[ $family -lt 6 ] && return
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echo -n $"Applying Intel CPU microcode update: "
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if [ ! -e $DATAFILE ]; then
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echo $"$0: CPU microcode data file not present ($DATAFILE)"
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exit 1
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fi
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/sbin/modprobe microcode
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lt=0
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while [ ! -c $DEVICE ]; do
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lt=$[lt+1];
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[ $lt -gt 5 ] && break;
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sleep 1;
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done
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# Lets just be sure we have a device file...
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if [ ! -e $DEVICE ]; then
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echo $"$0: microcode device $DEVICE doesn't exist?"
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exit 1
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elif [ ! -c $DEVICE ]; then
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echo $"$0: $DEVICE not a character device?"
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exit 1
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fi
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daemon $PROGRAM $ARGUMENTS
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RETVAL=$?
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# trap the most common case, errno 19 = no device
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if [ $RETVAL -eq 19 ]; then
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echo $"$0: kernel does not have CPU microcode device support"
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fi
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/sbin/rmmod microcode
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echo
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[ $RETVAL -eq 0 ] && touch /var/lock/subsys/microcode_ctl
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return $RETVAL
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}
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stop()
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{
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rm -f /var/lock/subsys/microcode_ctl
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}
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case "$1" in
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start)
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start
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exit 0
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;;
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stop)
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stop
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;;
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restart|reload|force-reload)
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stop
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start
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;;
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status)
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;;
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*)
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echo $"Usage: $0 {start|stop|restart}"
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exit 1
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esac
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exit $?
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