[PATCH v2 1/2] docs: document sysfs ABI for vDPA bus

[Stefano Garzarella]

Add missing documentation of sysfs ABI for vDPA bus in
the new Documentation/ABI/testing/sysfs-bus-vdpa file.

Signed-off-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
---
 Documentation/ABI/testing/sysfs-bus-vdpa | 37 ++++++++++++++++++++++++
 MAINTAINERS                              |  1 +
 2 files changed, 38 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-vdpa

diff --git a/Documentation/ABI/testing/sysfs-bus-vdpa b/Documentation/ABI/testing/sysfs-bus-vdpa
new file mode 100644
index 000000000000..4e55761a39df
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-vdpa
@@ -0,0 +1,37 @@
+What:		/sys/bus/vdpa/driver_autoprobe
+Date:		March 2020
+Contact:	virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
+Description:
+		This file determines whether new devices are immediately bound
+		to a driver after the creation. It initially contains 1, which
+		means the kernel automatically binds devices to a compatible
+		driver immediately after they are created.
+
+		Writing "0" to this file disable this feature, any other string
+		enable it.
+
+What:		/sys/bus/vdpa/driver_probe
+Date:		March 2020
+Contact:	virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
+Description:
+		Writing a device name to this file will cause the kernel binds
+		devices to a compatible driver.
+
+		This can be useful when /sys/bus/vdpa/driver_autoprobe is
+		disabled.
+
+What:		/sys/bus/vdpa/drivers/.../bind
+Date:		March 2020
+Contact:	virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
+Description:
+		Writing a device name to this file will cause the driver to
+		attempt to bind to the device. This is useful for overriding
+		default bindings.
+
+What:		/sys/bus/vdpa/drivers/.../unbind
+Date:		March 2020
+Contact:	virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
+Description:
+		Writing a device name to this file will cause the driver to
+		attempt to unbind from the device. This may be useful when
+		overriding default bindings.
diff --git a/MAINTAINERS b/MAINTAINERS
index 5250298d2817..36ea80b4ba63 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20104,6 +20104,7 @@ M:	"Michael S. Tsirkin" <mst@xxxxxxxxxx>
 M:	Jason Wang <jasowang@xxxxxxxxxx>
 L:	virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
 S:	Maintained
+F:	Documentation/ABI/testing/sysfs-bus-vdpa
 F:	Documentation/devicetree/bindings/virtio/
 F:	drivers/block/virtio_blk.c
 F:	drivers/crypto/virtio/
-- 
2.31.1