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docs: virtio-gpu + virgl assessment — honest state, linux-7.0 cache protected

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Virtio-gpu display driver (217 lines) exists in redox-drm — KMS, GEM,
page flip all work. QEMU display path functional.

Mesa virgl (3D acceleration for QEMU):
- Build attempted with -Dgallium-drivers=swrast,virgl
- Reaches 932/1104 objects
- Blocked: virgl_screen.c int-conversion errors, vtest winsys needs
  bits/safamily-t.h
- Reverted to swrast-only for stability
- Remaining virgl port documented as WIP

Linux 7.0 kernel source:
- Cloned to local/linux-kernel-cache/linux-7.0 (durable, survives clean)
- Symlinked from build/linux-kernel-cache/linux-7.0
- Added to .gitignore (embedded repo)
- Drivers/gpu/drm/virtio/ available for virgl protocol reference
This commit is contained in:
Vasilito
2026-05-01 00:13:20 +01:00
parent a2d3c9181e
commit 1c3ed9ec0d
2 changed files with 7 additions and 0 deletions
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@@ -84,3 +84,4 @@ local/cache/pkgar/
Packages/redbear-firmware.pkgar Packages/redbear-firmware.pkgar
packages/ packages/
sources/ sources/
local/linux-kernel-cache/
local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md
+6
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@@ -113,10 +113,16 @@ The kernel handles 35 syscalls explicitly. Remaining gaps:
| Component | Status | Detail | | Component | Status | Detail |
|-----------|--------|--------| |-----------|--------|--------|
| mesa | 🟡 Builds | llvmpipe software renderer; EGL=on, GBM=on, GLES2=on | | mesa | 🟡 Builds | llvmpipe software renderer; EGL=on, GBM=on, GLES2=on |
| mesa virgl (QEMU 3D) | 🔴 WIP | Build attempted — virgl_screen.c int-conversion errors; vtest winsys needs `bits/safamily-t.h`; requires Mesa source patches for Redox target |
| radeonsi (AMD HW) | 🔴 Not built | Not cross-compiled for Redox target | | radeonsi (AMD HW) | 🔴 Not built | Not cross-compiled for Redox target |
| iris (Intel HW) | 🔴 Not built | Not cross-compiled for Redox target | | iris (Intel HW) | 🔴 Not built | Not cross-compiled for Redox target |
| OSMesa | 🟢 Builds | Off-screen software rendering | | OSMesa | 🟢 Builds | Off-screen software rendering |
**virgl path**: Mesa `-Dgallium-drivers=swrast,virgl` compilation reaches 932/1104 objects.
Remaining work: (1) fix `virgl_screen.c` int-conversion warnings-as-errors on Redox target,
(2) provide `bits/safamily-t.h` or disable vtest winsys,
(3) integrate virgl drm winsys with redox-drm CS ioctl backend.
**Blocker**: Mesa hardware renderer cross-compilation requires CS ioctl backend + validation hardware. **Blocker**: Mesa hardware renderer cross-compilation requires CS ioctl backend + validation hardware.
### 2.3 Hardware GPU — The Big Gap ### 2.3 Hardware GPU — The Big Gap