Re: [PATCH v6 10/10] docs/system: virtio-gpu: Document host/guest requirements

["Alex Bennée" <alex.bennee@linaro.org>]

Akihiko Odaki <akihiko.odaki@daynix.com> writes:

> On 2025/01/27 5:11, Dmitry Osipenko wrote:
>> From: Alex Bennée <alex.bennee@linaro.org>
>> This attempts to tidy up the VirtIO GPU documentation to make the
>> list
>> of requirements clearer. There are still a lot of moving parts and the
>> distros have some catching up to do before this is all handled
>> automatically.
>> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
>> Cc: Sergio Lopez Pascual <slp@redhat.com>
>> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
>> [dmitry.osipenko@collabora.com: Extended and corrected doc]
<snip>
>>   virtio-gpu rutabaga
>>   -------------------
>>   @@ -133,3 +218,23 @@ Surfaceless is the default if ``wsi`` is not
>> specified.
>>   .. _Wayland display passthrough: https://www.youtube.com/watch?v=OZJiHMtIQ2M
>>   .. _gfxstream-enabled rutabaga: https://crosvm.dev/book/appendix/rutabaga_gfx.html
>>   .. _guest Wayland proxy: https://crosvm.dev/book/devices/wayland.html
>> +
>> +.. list-table:: Host Requirements
>> +  :header-rows: 1
>> +
>> +  * - Mode
>> +    - Kernel
>> +    - Userspace
>> +  * - virtio-gpu-gl (rutabaga/gfxstream)
>> +    - GPU enabled
>> +    - aemu/rutabaga_gfx_ffi or vhost-user client with support
>
> Let's omit the mention of aemu. It is a dependency of rutabaga_gfx_ffi
> and referring to dependencies of our dependencies will make the
> documentation too cluttered. Users should also see rutabaga_gfx_ffi
> needs aemu anyway in its build guide; the reference of aemu here is
> effectively redundant.
>
> I don't see the vhost-user support in Rutabaga. Does it really exist?

vhost-device-gpu supports gfxstream although the 3D acceleration parts
of that are still WIP:

  https://github.com/rust-vmm/vhost-device/tree/main/staging/vhost-device-gpu

>
>> +
>> +.. list-table:: Guest Requirements
>> +  :header-rows: 1
>> +
>> +  * - Mode
>> +    - Mesa Version
>> +    - Mesa build flags
>> +  * - virtio-gpu-gl (rutabaga/gfxstream)
>> +    - 24.3.0+
>> +    - -Dvulkan-drivers=gfxstream

-- 
Alex Bennée
Virtualisation Tech Lead @ Linaro