[Buildroot] [PATCH v3 0/4] package/mesa3d: add host native context configs

[Joseph Kogut <joseph@anodize.com>]

The first patch adds a config for mesa to enable the virtio backend for
amdgpu. The second patch enables the same feature for freedreno. The
third patch rounds out the freedreno API support by adding a config to
enable the vulkan driver (turnip), which can also be used with the
virtio backend.

This allows the mesa user-mode drivers that interface with the
amdgpu kernel-mode driver (radeonsi, RADV) and freedreno KMD (freedreno,
turnip) to do so inside virtualized guests over virtio-gpu, mediated by
virglrenderer on the host.

This combination, known as host native context [0], (sometimes referred
to as vDRM) is an alternative to VirGL/Venus for accelerated graphics
and compute in virtualized guests.

Host native context runs the UMD directly in guests. Compared to API
level virtualization through VirGL/Venus, host native context enables
lower overhead, more complete API support, better security, and
additional features like hardware accelerated video encode/decode.

VMMs that support host native context currently include libkrun [1]
based projects like muvm [2], and qemu as of v11.0.0. Also, VMMs which support
rutabaga-gfx [4], including CrosVM and qemu (partial).

See this video [5] for a demonstration of libkrun/muvm with host native
context using the asahi UMD.

Upstream mesa recently also merged support for i915 and panfrost host
native context, which should be a part of v26.3. Those config options
can be added once they become available in a supported release.

See also the patches adding the virglrenderer package [6] to buildroot,
and bumping qemu to v11.0.0 [7].

[0] https://www.collabora.com/news-and-blog/blog/2025/01/15/the-state-of-gfx-virtualization-using-virglrenderer/
[1] https://github.com/containers/libkrun
[2] https://github.com/AsahiLinux/muvm
[3] https://www.qemu.org/2026/04/22/qemu-11-0-0/
[4] https://github.com/magma-gpu/rutabaga_gfx
[5] https://www.youtube.com/watch?v=xRNu0XaXTng
[6] https://lore.kernel.org/buildroot/20260512-virglrenderer-v5-0-1806e588eb59@gmail.com/
[7] https://lore.kernel.org/buildroot/20260514-qemu-v11-0-0-v3-1-e64cbadaa8e5@anodize.com/T/#u

Signed-off-by: Joseph Kogut <joseph@anodize.com>
---
Changes in v3:
- Minor continuity fix in Config.in [Romain]
- Link to v2: https://patch.msgid.link/20260512-mesa3d-amdgpu-virtio-v2-0-30678b797df9@anodize.com

Changes in v2:
- s/MESA3D_GALLIUM_DRIVER_FREEDRENO_KMDS/MESA3D_FREEDRENO_KMDS [Romain]
- Link to v1: https://lore.kernel.org/buildroot/20260227-mesa3d-amdgpu-virtio-v1-3-3e6d10d4eaef@anodize.com/

---
Joseph Kogut (4):
      package/mesa3d: add amdgpu-virtio config
      package/mesa3d: add freedreno-virtio config
      package/mesa3d: add freedreno vulkan driver config
      DEVELOPERS: add package/mesa3d for Joseph Kogut

 DEVELOPERS               |  1 +
 package/mesa3d/Config.in | 39 +++++++++++++++++++++++++++++++++++++++
 package/mesa3d/mesa3d.mk | 17 +++++++++++++++++
 3 files changed, 57 insertions(+)
---
base-commit: 1cc6279d1144c0b61dc6051eb57ab8800931c96c
change-id: 20260225-mesa3d-amdgpu-virtio-a5b4116ea08c

Best regards,
-- 
Joseph Kogut <joseph@anodize.com>
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---
Joseph Kogut (4):
      package/mesa3d: add amdgpu-virtio config
      package/mesa3d: add freedreno-virtio config
      package/mesa3d: add freedreno vulkan driver config
      DEVELOPERS: add package/mesa3d for Joseph Kogut

 DEVELOPERS               |  1 +
 package/mesa3d/Config.in | 39 +++++++++++++++++++++++++++++++++++++++
 package/mesa3d/mesa3d.mk | 17 +++++++++++++++++
 3 files changed, 57 insertions(+)
---
base-commit: eb496bd63ef4a4466f9482fa4b3226e20cfb7f7b
change-id: 20260512-mesa3d-amdgpu-virtio-2d917a137424

Best regards,
--  
Joseph Kogut <joseph@anodize.com>

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