mirror of
https://github.com/rust-vmm/vhost-device.git
synced 2025-12-30 17:49:08 +00:00
64 lines
2.2 KiB
Markdown
64 lines
2.2 KiB
Markdown
# vhost-device-input
|
|
|
|
## Synopsis
|
|
vhost-device-input --socket-path <SOCKET_PATH> --event-list <EVENT_LIST>
|
|
|
|
## Description
|
|
|
|
This program is a vhost-user backend that emulates a VirtIO input event.
|
|
It polls on a host's input event device (/dev/input/eventX) and passes the
|
|
input event data to guests.
|
|
|
|
This program is tested with QEMU's `vhost-user-input-pci`. The
|
|
implementation is based on the vhost-user protocol and as such should be
|
|
interoperable with other virtual machine managers. Please see below for
|
|
working examples.
|
|
|
|
## Options
|
|
|
|
```text
|
|
-h, --help
|
|
Print help.
|
|
|
|
-s, --socket-path <SOCKET_PATH>
|
|
Location of vhost-user Unix domain sockets, this path will be suffixed with
|
|
0,1,2..event_count-1.
|
|
|
|
-e, --event-list <EVENT_LIST>
|
|
Input event device list in the format: event_device1,event_device2,...
|
|
Example: --event-list /dev/input/event14,/dev/input/event15
|
|
```
|
|
|
|
## Examples
|
|
|
|
The daemon should be started first:
|
|
|
|
```shell
|
|
host# vhost-device-input --socket-path /some/path/input.sock \
|
|
--event-list /dev/input/event14,/dev/input/event15
|
|
```
|
|
|
|
Note that from the above command the socket path "/some/path/input.sock0" and
|
|
"/some/path/input.sock1" will be created for input events "event14" and
|
|
"event15" respectively. This in turn needs to be communicated as chardev
|
|
sockets to QEMU in order for the backend daemon and access the Virtio queues
|
|
with the guest over the shared memory.
|
|
|
|
```shell
|
|
host# qemu-system -M virt \
|
|
-object memory-backend-file,id=mem,size=4G,mem-path=/dev/shm,share=on \
|
|
-chardev socket,path=/some/path/input.sock0,id=kbd0 \
|
|
-device vhost-user-input-pci,chardev=kdb0 \
|
|
-chardev socket,path=/some/path/input.sock1,id=mouse0 \
|
|
-device vhost-user-input-pci,chardev=mouse0 \
|
|
-numa node,memdev=mem \
|
|
...
|
|
```
|
|
|
|
## License
|
|
|
|
This project is licensed under either of
|
|
|
|
- [Apache License](http://www.apache.org/licenses/LICENSE-2.0), Version 2.0
|
|
- [BSD-3-Clause License](https://opensource.org/licenses/BSD-3-Clause)
|