On Wed, Aug 09, 2023 at 09:50:29AM +0800, Gurchetan Singh wrote:
> On Mon, Aug 7, 2023 at 7:24 AM Erico Nunes <[1]ernunes@redhat.com>
> wrote:
>
> Hello,
> On 04/08/2023 01:54, Gurchetan Singh wrote:
> > Prior versions:
> >
> >
> [2]https://lists.gnu.org/archive/html/qemu-devel/2023-07/msg05801.ht
> ml
> >
> >
> [3]https://lists.gnu.org/archive/html/qemu-devel/2023-07/msg02341.ht
> ml
> >
> >
> [4]https://patchew.org/QEMU/20230421011223.718-1-gurchetansingh@chro
> mium.org/
> >
> > Changes since v2:
> > - Incorporated review feedback
> >
> > How to build both rutabaga and gfxstream guest/host libs:
> >
> > [5]https://crosvm.dev/book/appendix/rutabaga_gfx.html
> >
> > Branch containing this patch series:
> >
> >
> [6]https://gitlab.freedesktop.org/gurchetansingh/qemu-gfxstream/-/co
> mmits/qemu-gfxstream-v3
> I tried this on Fedora with a Fedora guest and I was able to get
> Vulkan
> headless applications as well as Wayland proxy with sommelier to
> work.
> If you don't mind, I have a few questions.
> I was not able to run Vulkan applications over the Wayland proxy,
> only
> unaccelerated apps. This seems to be unsupported yet; is actually
> unsupported for now or was something missing in my setup?
>
> Yes, currently this is unsupported. In the near future, I do imagine
> 3D accelerated rendering over cross-domain to be a thing (among many
> context types, not just gfxstream VK).
> Re: using gfxstream VK in Linux distros, depends on your use case. If
> you are looking for best performance over virtio on open-source Linux
> platforms, perhaps gfxstream Vulkan (or any API virtualization
> solution) is not your best bet. The Mesa native context work looks
> particularly exciting there:
> [7]https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21658
In fact, we will introduce both venus and virtio native context next step
with qemu. :-)
I am cleanning up the codes will send out the qemu very soon.
Thanks,
Ray
> We are interested in running gfxstream VK in Linux guests, but we
> envisage that for reference and testing. For all embedded use cases,
> using the host driver in the guest will predominate due to performance
> considerations (either through virtio or HW direct / mediated
> passthru).
>
> Also apparently GL/GLES is only supported on Android right now as
> you
> mentioned, since on Linux the gfxstream guest only installs the
> Vulkan
> library and icd. What is the plan to support GL on Linux; provide
> gfxstream GL guest libraries later or enable Zink or some other
> solution?
> Then if I understand correctly, Mesa virgl is not used at all with
> the
> gfxstream solution, so I guess we would need to find a way to ship
> the
> gfxstream guest libraries too on distributions?
>
>
>
> Also I wonder about including all of the the dependencies required
> to
> get this to build on distributions as well to enable the feature on
> distribution-provided qemu, but I guess we can figure this out
> later...
> And finally out of curiosity, I see that rutabaga also has a
> virgl_renderer (and virgl_renderer_next) backend which would then
> not
> use gfxstream but virglrenderer instead. I wonder if there would be
> any
> benefit/features in enabling that with qemu later compared to the
> current qemu virtio/virglrenderer implementation (if that would make
> sense at all)?
>
> Yeah, maybe later if there's developer interest, rutabaga FFI can
> build its virglrenderer bindings in a subsequent release. So far I
> don't have time to test, and the most important use case is gfxstream +
> Android for Emulator. As ever, patches are welcome.
>
> Thanks
> Erico
>
> References
>
> 1. mailto:ernunes@redhat.com
> 2. https://lists.gnu.org/archive/html/qemu-devel/2023-07/msg05801.html
> 3. https://lists.gnu.org/archive/html/qemu-devel/2023-07/msg02341.html
> 4. https://patchew.org/QEMU/20230421011223.718-1-gurchetansingh@chromium.org/
> 5. https://crosvm.dev/book/appendix/rutabaga_gfx.html
> 6. https://gitlab.freedesktop.org/gurchetansingh/qemu-gfxstream/-/commits/qemu-gfxstream-v3
> 7. https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21658