core-admin/dom0/aux-tools/unbind_pci_device.sh

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#!/bin/sh
#
# The Qubes OS Project, http://www.qubes-os.org
#
# Copyright (C) 2010 Joanna Rutkowska <joanna@invisiblethingslab.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
#
BDF=$1
if [ x$BDF = x ] ; then
echo "usage: $0 <BDF>"
exit 0
fi
BDF=0000:$BDF
#echo -n "Binding device $BDF to xen-pciback..."
if [ -e /sys/bus/pci/drivers/pciback/$BDF ]; then
# Already bound to pciback
# Check if device not assigned to any RUNNING VM
XS_PATH=/local/domain/0/backend/pci
GREP_RE="^$XS_PATH/[0-9]*/[0-9]*/dev-[0-9]* = \"$BDF\""
if xenstore-ls -f $XS_PATH | grep -q "$GREP_RE"; then
DOMID=`xenstore-ls -f $XS_PATH | grep "$GREP_RE"|cut -d/ -f7`
echo "ERROR: Device already attached to the running VM '`xl domname $DOMID`'" >&2
exit 1
fi
exit 0
fi
if [ -e /sys/bus/pci/devices/$BDF/driver/unbind ] ; then
echo -n $BDF > /sys/bus/pci/devices/$BDF/driver/unbind || exit 1
fi
echo -n $BDF > /sys/bus/pci/drivers/pciback/new_slot || exit 1
echo -n $BDF > /sys/bus/pci/drivers/pciback/bind || exit 1
#echo ok