| What: /sys/bus/vdpa/drivers_autoprobe |
| Date: March 2020 |
| Contact: virtualization@lists.linux-foundation.org |
| 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@lists.linux-foundation.org |
| 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/drivers_autoprobe is |
| disabled. |
| |
| What: /sys/bus/vdpa/drivers/.../bind |
| Date: March 2020 |
| Contact: virtualization@lists.linux-foundation.org |
| 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@lists.linux-foundation.org |
| 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. |
| |
| What: /sys/bus/vdpa/devices/.../driver_override |
| Date: November 2021 |
| Contact: virtualization@lists.linux-foundation.org |
| Description: |
| This file allows the driver for a device to be specified. |
| When specified, only a driver with a name matching the value |
| written to driver_override will have an opportunity to bind to |
| the device. The override is specified by writing a string to the |
| driver_override file (echo vhost-vdpa > driver_override) and may |
| be cleared with an empty string (echo > driver_override). |
| This returns the device to standard matching rules binding. |
| Writing to driver_override does not automatically unbind the |
| device from its current driver or make any attempt to |
| automatically load the specified driver. If no driver with a |
| matching name is currently loaded in the kernel, the device will |
| not bind to any driver. This also allows devices to opt-out of |
| driver binding using a driver_override name such as "none". |
| Only a single driver may be specified in the override, there is |
| no support for parsing delimiters. |
