Skip to main content

Browse the archive

Revision 048f49809c526348775425420fb5b8e84fd9a133 authored by Sean Christopherson on 25 March 2021, 20:01:18 UTC, committed by Paolo Bonzini on 30 March 2021, 17:19:55 UTC 
KVM: x86/mmu: Ensure TLBs are flushed for TDP MMU during NX zapping
 
Honor the "flush needed" return from kvm_tdp_mmu_zap_gfn_range(), which
does the flush itself if and only if it yields (which it will never do in
this particular scenario), and otherwise expects the caller to do the
flush.  If pages are zapped from the TDP MMU but not the legacy MMU, then
no flush will occur.

Fixes: 29cf0f5007a2 ("kvm: x86/mmu: NX largepage recovery for TDP MMU")
Cc: stable@vger.kernel.org
Cc: Ben Gardon <bgardon@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210325200119.1359384-3-seanjc@google.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent a835429
Raw File
config3270.sh 
#!/bin/sh
#
# config3270 -- Autoconfigure /dev/3270/* and /etc/inittab
#
#       Usage:
#               config3270
#
#       Output:
#               /tmp/mkdev3270
#
#       Operation:
#               1. Run this script
#               2. Run the script it produces: /tmp/mkdev3270
#               3. Issue "telinit q" or reboot, as appropriate.
#
P=/proc/tty/driver/tty3270
ROOT=
D=$ROOT/dev
SUBD=3270
TTY=$SUBD/tty
TUB=$SUBD/tub
SCR=$ROOT/tmp/mkdev3270
SCRTMP=$SCR.a
GETTYLINE=:2345:respawn:/sbin/mingetty
INITTAB=$ROOT/etc/inittab
NINITTAB=$ROOT/etc/NEWinittab
OINITTAB=$ROOT/etc/OLDinittab
ADDNOTE=\\"# Additional mingettys for the 3270/tty* driver, tub3270 ---\\"

if ! ls $P > /dev/null 2>&1; then
	modprobe tub3270 > /dev/null 2>&1
fi
ls $P > /dev/null 2>&1 || exit 1

# Initialize two files, one for /dev/3270 commands and one
# to replace the /etc/inittab file (old one saved in OLDinittab)
echo "#!/bin/sh" > $SCR || exit 1
echo " " >> $SCR
echo "# Script built by /sbin/config3270" >> $SCR
if [ ! -d /dev/dasd ]; then
	echo rm -rf "$D/$SUBD/*" >> $SCR
fi
echo "grep -v $TTY $INITTAB > $NINITTAB" > $SCRTMP || exit 1
echo "echo $ADDNOTE >> $NINITTAB" >> $SCRTMP
if [ ! -d /dev/dasd ]; then
	echo mkdir -p $D/$SUBD >> $SCR
fi

# Now query the tub3270 driver for 3270 device information
# and add appropriate mknod and mingetty lines to our files
echo what=config > $P
while read devno maj min;do
	if [ $min = 0 ]; then
		fsmaj=$maj
		if [ ! -d /dev/dasd ]; then
			echo mknod $D/$TUB c $fsmaj 0 >> $SCR
			echo chmod 666 $D/$TUB >> $SCR
		fi
	elif [ $maj = CONSOLE ]; then
		if [ ! -d /dev/dasd ]; then
			echo mknod $D/$TUB$devno c $fsmaj $min >> $SCR
		fi
	else
		if [ ! -d /dev/dasd ]; then
			echo mknod $D/$TTY$devno c $maj $min >>$SCR
			echo mknod $D/$TUB$devno c $fsmaj $min >> $SCR
		fi
		echo "echo t$min$GETTYLINE $TTY$devno >> $NINITTAB" >> $SCRTMP
	fi
done < $P

echo mv $INITTAB $OINITTAB >> $SCRTMP || exit 1
echo mv $NINITTAB $INITTAB >> $SCRTMP
cat $SCRTMP >> $SCR
rm $SCRTMP
exit 0
back to top