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