4 files changed, 147 insertions, 0 deletions
diff --git a/tools/testing/selftests/vfio/scripts/cleanup.sh b/tools/testing/selftests/vfio/scripts/cleanup.sh
new file mode 100755
index 000000000000..69c922d8aafb
--- /dev/null
+++ b/tools/testing/selftests/vfio/scripts/cleanup.sh
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+source $(dirname -- "${BASH_SOURCE[0]}")/lib.sh
+
+function cleanup_devices() {
+	local device_bdf
+	local device_dir
+
+	for device_bdf in "$@"; do
+		device_dir=${DEVICES_DIR}/${device_bdf}
+
+		if [ -f ${device_dir}/vfio-pci ]; then
+			unbind ${device_bdf} vfio-pci
+		fi
+
+		if [ -f ${device_dir}/driver_override ]; then
+			clear_driver_override ${device_bdf}
+		fi
+
+		if [ -f ${device_dir}/driver ]; then
+			bind ${device_bdf} $(cat ${device_dir}/driver)
+		fi
+
+		if [ -f ${device_dir}/sriov_numvfs ]; then
+			set_sriov_numvfs ${device_bdf} $(cat ${device_dir}/sriov_numvfs)
+		fi
+
+		rm -rf ${device_dir}
+	done
+}
+
+function main() {
+	if [ $# = 0 ]; then
+		cleanup_devices $(ls ${DEVICES_DIR})
+		rmdir ${DEVICES_DIR}
+	else
+		cleanup_devices "$@"
+	fi
+}
+
+main "$@"
diff --git a/tools/testing/selftests/vfio/scripts/lib.sh b/tools/testing/selftests/vfio/scripts/lib.sh
new file mode 100755
index 000000000000..9f05f29c7b86
--- /dev/null
+++ b/tools/testing/selftests/vfio/scripts/lib.sh
@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+readonly DEVICES_DIR="${TMPDIR:-/tmp}/vfio-selftests-devices"
+
+function write_to() {
+	# Unfortunately set -x does not show redirects so use echo to manually
+	# tell the user what commands are being run.
+	echo "+ echo \"${2}\" > ${1}"
+	echo "${2}" > ${1}
+}
+
+function get_driver() {
+	if [ -L /sys/bus/pci/devices/${1}/driver ]; then
+		basename $(readlink -m /sys/bus/pci/devices/${1}/driver)
+	fi
+}
+
+function bind() {
+	write_to /sys/bus/pci/drivers/${2}/bind ${1}
+}
+
+function unbind() {
+	write_to /sys/bus/pci/drivers/${2}/unbind ${1}
+}
+
+function set_sriov_numvfs() {
+	write_to /sys/bus/pci/devices/${1}/sriov_numvfs ${2}
+}
+
+function get_sriov_numvfs() {
+	if [ -f /sys/bus/pci/devices/${1}/sriov_numvfs ]; then
+		cat /sys/bus/pci/devices/${1}/sriov_numvfs
+	fi
+}
+
+function set_driver_override() {
+	write_to /sys/bus/pci/devices/${1}/driver_override ${2}
+}
+
+function clear_driver_override() {
+	set_driver_override ${1} ""
+}
diff --git a/tools/testing/selftests/vfio/scripts/run.sh b/tools/testing/selftests/vfio/scripts/run.sh
new file mode 100755
index 000000000000..91fd38f9f6f6
--- /dev/null
+++ b/tools/testing/selftests/vfio/scripts/run.sh
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+source $(dirname -- "${BASH_SOURCE[0]}")/lib.sh
+
+function main() {
+	local device_bdfs=$(ls ${DEVICES_DIR})
+
+	if [ -z "${device_bdfs}" ]; then
+		echo "No devices found, skipping."
+		exit 4
+	fi
+
+	"$@" ${device_bdfs}
+}
+
+main "$@"
diff --git a/tools/testing/selftests/vfio/scripts/setup.sh b/tools/testing/selftests/vfio/scripts/setup.sh
new file mode 100755
index 000000000000..49a499e51cbe
--- /dev/null
+++ b/tools/testing/selftests/vfio/scripts/setup.sh
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+set -e
+
+source $(dirname -- "${BASH_SOURCE[0]}")/lib.sh
+
+function main() {
+	local device_bdf
+	local device_dir
+	local numvfs
+	local driver
+
+	if [ $# = 0 ]; then
+		echo "usage: $0 segment:bus:device.function ..." >&2
+		exit 1
+	fi
+
+	for device_bdf in "$@"; do
+		test -d /sys/bus/pci/devices/${device_bdf}
+
+		device_dir=${DEVICES_DIR}/${device_bdf}
+		if [ -d "${device_dir}" ]; then
+			echo "${device_bdf} has already been set up, exiting."
+			exit 0
+		fi
+
+		mkdir -p ${device_dir}
+
+		numvfs=$(get_sriov_numvfs ${device_bdf})
+		if [ "${numvfs}" ]; then
+			set_sriov_numvfs ${device_bdf} 0
+			echo ${numvfs} > ${device_dir}/sriov_numvfs
+		fi
+
+		driver=$(get_driver ${device_bdf})
+		if [ "${driver}" ]; then
+			unbind ${device_bdf} ${driver}
+			echo ${driver} > ${device_dir}/driver
+		fi
+
+		set_driver_override ${device_bdf} vfio-pci
+		touch ${device_dir}/driver_override
+
+		bind ${device_bdf} vfio-pci
+		touch ${device_dir}/vfio-pci
+	done
+}
+
+main "$@"