1What: /sys/bus/vdpa/driver_autoprobe 2Date: March 2020 3Contact: virtualization@lists.linux-foundation.org 4Description: 5 This file determines whether new devices are immediately bound 6 to a driver after the creation. It initially contains 1, which 7 means the kernel automatically binds devices to a compatible 8 driver immediately after they are created. 9 10 Writing "0" to this file disable this feature, any other string 11 enable it. 12 13What: /sys/bus/vdpa/driver_probe 14Date: March 2020 15Contact: virtualization@lists.linux-foundation.org 16Description: 17 Writing a device name to this file will cause the kernel binds 18 devices to a compatible driver. 19 20 This can be useful when /sys/bus/vdpa/driver_autoprobe is 21 disabled. 22 23What: /sys/bus/vdpa/drivers/.../bind 24Date: March 2020 25Contact: virtualization@lists.linux-foundation.org 26Description: 27 Writing a device name to this file will cause the driver to 28 attempt to bind to the device. This is useful for overriding 29 default bindings. 30 31What: /sys/bus/vdpa/drivers/.../unbind 32Date: March 2020 33Contact: virtualization@lists.linux-foundation.org 34Description: 35 Writing a device name to this file will cause the driver to 36 attempt to unbind from the device. This may be useful when 37 overriding default bindings. 38 39What: /sys/bus/vdpa/devices/.../driver_override 40Date: November 2021 41Contact: virtualization@lists.linux-foundation.org 42Description: 43 This file allows the driver for a device to be specified. 44 When specified, only a driver with a name matching the value 45 written to driver_override will have an opportunity to bind to 46 the device. The override is specified by writing a string to the 47 driver_override file (echo vhost-vdpa > driver_override) and may 48 be cleared with an empty string (echo > driver_override). 49 This returns the device to standard matching rules binding. 50 Writing to driver_override does not automatically unbind the 51 device from its current driver or make any attempt to 52 automatically load the specified driver. If no driver with a 53 matching name is currently loaded in the kernel, the device will 54 not bind to any driver. This also allows devices to opt-out of 55 driver binding using a driver_override name such as "none". 56 Only a single driver may be specified in the override, there is 57 no support for parsing delimiters. 58