Re: [PATCH v4 6/6] docs/system: add a basic enumeration of vhost-user devices

[Manos Pitsidianakis <manos.pitsidianakis@linaro.org>]

On Mon, 09 Oct 2023 12:59, Alex Bennée <alex.bennee@linaro.org> wrote:
>diff --git a/docs/system/devices/vhost-user.rst 
>b/docs/system/devices/vhost-user.rst
>index a80e95a48a..0f9eec3f00 100644
>--- a/docs/system/devices/vhost-user.rst
>+++ b/docs/system/devices/vhost-user.rst
>@@ -15,6 +15,47 @@ to the guest. The code is mostly boilerplate although each device has
> a ``chardev`` option which specifies the ID of the ``--chardev``
> device that connects via a socket to the vhost-user *daemon*.
> 
>+Each device will have an virtio-mmio and virtio-pci variant. See your
>+platform details for what sort of virtio bus to use.
>+
>+.. list-table:: vhost-user devices
>+  :widths: 20 20 60
>+  :header-rows: 1
>+
>+  * - Device
>+    - Type
>+    - Notes
>+  * - vhost-user-device
>+    - Generic Development Device
>+    - You must manually specify ``virtio-id`` and the correct ``num_vqs``. Intended for expert use.

May be worth specifying they are `VHostUserBase` interface fields since 
it's not directly obvious if you come across this before reading the 
vhost-user-device code.

>+  * - vhost-user-blk
>+    - Block storage
>+    -
>+  * - vhost-user-fs
>+    - File based storage driver
>+    - See https://gitlab.com/virtio-fs/virtiofsd
>+  * - vhost-user-scsi
>+    - SCSI based storage
>+    - See contrib/vhost-user/scsi
>+  * - vhost-user-gpio
>+    - Proxy gpio pins to host
>+    - See https://github.com/rust-vmm/vhost-device
>+  * - vhost-user-i2c
>+    - Proxy i2c devices to host
>+    - See https://github.com/rust-vmm/vhost-device
>+  * - vhost-user-input
>+    - Generic input driver
>+    - See contrib/vhost-user-input
>+  * - vhost-user-rng
>+    - Entropy driver
>+    - :ref:`vhost_user_rng`
>+  * - vhost-user-gpu
>+    - GPU driver
>+    -
>+  * - vhost-user-vsock
>+    - Socket based communication
>+    - See https://github.com/rust-vmm/vhost-device
>+

There's also:

- hw/virtio/vhost-user-scmi.c
- hw/virtio/vhost-user-snd.c