On 3/10/25 14:35, Akihiko Odaki wrote: > On 2025/03/10 20:12, Dmitry Osipenko wrote: >> From: Alex Bennée <alex.ben...@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.ben...@linaro.org> >> Cc: Sergio Lopez Pascual <s...@redhat.com> >> Signed-off-by: Dmitry Osipenko <dmitry.osipe...@collabora.com> >> [dmitry.osipe...@collabora.com: Extended and corrected doc] >> --- >> docs/system/devices/virtio-gpu.rst | 94 +++++++++++++++++++++++++++++- >> 1 file changed, 91 insertions(+), 3 deletions(-) >> >> diff --git a/docs/system/devices/virtio-gpu.rst b/docs/system/devices/ >> virtio-gpu.rst >> index ea3eb052df3c..3e4a1e2c87a0 100644 >> --- a/docs/system/devices/virtio-gpu.rst >> +++ b/docs/system/devices/virtio-gpu.rst >> @@ -5,14 +5,28 @@ virtio-gpu >> ========== >> This document explains the setup and usage of the virtio-gpu device. >> -The virtio-gpu device paravirtualizes the GPU and display controller. >> +The virtio-gpu device provides a GPU and display controller >> +paravirtualized using VirtIO. It supports a number of different modes >> +from simple 2D displays to fully accelerated 3D graphics. >> -Linux kernel support >> --------------------- >> +Linux guest kernel support >> +-------------------------- >> virtio-gpu requires a guest Linux kernel built with the >> ``CONFIG_DRM_VIRTIO_GPU`` option. >> +3D acceleration >> +--------------- >> + >> +3D acceleration of a virtualized GPU is still an evolving field. >> +Depending on the 3D mode you are running you may need to override >> +distribution supplied libraries with more recent versions or enable >> +build options. There are a number of requirements the host must meet >> +to be able to be able to support guests. QEMU must be able to access the >> +host's GPU and for the best performance be able to reliably share GPU >> +memory with the guest. Details of 3D acceleration requirements are >> +described in a further sections. >> + >> QEMU virtio-gpu variants >> ------------------------ >> @@ -65,8 +79,14 @@ intermediate representation is communicated to >> the host and the >> `virglrenderer`_ library on the host translates the intermediate >> representation back to OpenGL API calls. >> +By default OpenGL version on guest is limited to 4.3. In order to >> enable >> +OpenGL 4.6 support, virtio-gpu host blobs feature (``hostmem`` and >> ``blob`` >> +fields) should be enabled. The ``hostmem`` field specifies the size of >> +virtio-gpu host memory window. This is typically between 256M and 8G. >> + >> .. parsed-literal:: >> -device virtio-gpu-gl >> + -device virtio-gpu-gl,hostmem=8G,blob=true >> .. _virgl: https://docs.mesa3d.org/drivers/virgl.html >> .. _Gallium3D: https://www.freedesktop.org/wiki/Software/gallium/ >> @@ -94,6 +114,56 @@ of virtio-gpu host memory window. This is >> typically between 256M and 8G. >> .. _drm: https://gitlab.freedesktop.org/virgl/virglrenderer/-/ >> tree/main/src/drm >> +.. list-table:: Linux Host Requirements >> + :header-rows: 1 >> + >> + * - Capability >> + - Kernel Version >> + * - OpenGL pass-through >> + - Any Linux version compatible with QEMU if not using host blobs >> feature, >> + Linux 6.13+ otherwise >> + * - Vulkan pass-through >> + - Linux 6.13+ >> + * - AMDGPU DRM native context >> + - Linux 6.13+ >> + * - Freedreno DRM native context >> + - Linux 6.4+ >> + * - Intel i915 DRM native context `mr1384`_ >> + - Linux 6.13+ >> + * - Asahi DRM native context `mr1274`_ >> + - `Downstream version`_ of Asahi Linux kernel >> + >> +.. _mr1384: https://gitlab.freedesktop.org/virgl/virglrenderer/-/ >> merge_requests/1384 >> +.. _mr1274: https://gitlab.freedesktop.org/virgl/virglrenderer/-/ >> merge_requests/1274 > > These links to virglrenderer merge requests are nice additions. It's > better to have a column for virglrenderer like the "Mesa Version" column > in the "Linux Guest Requirements" table.
Ack >> +.. _Downstream version: https://gitlab.freedesktop.org/asahi/linux > > I think you want to refer to: https://github.com/AsahiLinux/linux > The linked repository of Asahi says it had a last update a year ago. > The repository on GitHub is updated 4 days ago so it's newer. That's why I wasn't adding links to Asahi, it's odd and non-upstream :) Will change the link. -- Best regards, Dmitry
