marfrit
c14c22f942
Adds 0007-panvk-bifrost-xfb-component-base-fix.patch — eliminates a
reliable SIGSEGV in vkCreateGraphicsPipeline whenever an XFB-bound
vertex output is declared with non-zero `layout (component=N)`.
Surfaced by dEQP-VK.transform_feedback.simple.holes_vert (Mali-G52 r1
MC1, PAN_ARCH 7). Backtrace lands 11 frames into libvulkan_panfrost.so
called from vkt::TransformFeedback::TransformFeedbackHolesInstance::
iterate.
Root cause: iter17's lower_xfb_output_iter17 (and upstream
pan_nir_lower_xfb, which has the identical `// TODO`) computes the
source-channel mask as `mask << channel_idx`, where channel_idx is
the varying-location component (0..3) but src only contains channels
starting at nir_intrinsic_component(intr). For a scalar declared
component=2, the lowering computed `mask << 2` against a 1-component
src — out-of-range; the malformed nir_def segfaulted in downstream
NIR constant-folding (nir_constant_expressions.c::evaluate_*).
Fix translates channel_idx to source-channel space by subtracting
nir_intrinsic_component(intr) before shifting the mask, and replaces
the elided release-mode asserts with explicit release-mode guards
(closes the same elision class as the original bug).
Verified on PineTab2 (Mali-G52 r1 MC1, PAN_ARCH 7) against vulkan-cts
1.3.10.0:
- holes_vert / holes_extra_draw_vert no longer SIGSEGV (now Fail
on color-check; that is a separate iter20 finding).
- basic_*: 36/36 Pass. depth_clip_*: 1 Pass + 4 NotSupported.
lines_or_triangles*: 16 NotSupported. 0 Fail across the set.
Caveat (not regressions): max_output_components_64/_128/_256 were
never reached on the r5 sweep — watchdog killed transform_feedback
after the holes_vert crash. With this fix in place, they now run
and surface their own pre-existing coredumps, confirmed on shipped
r6 baseline too. iter20+ territory.
Phase 5 (2nd-model) review: APPROVE WITH CHANGES (non-blocking).
Changes applied: release-mode defensive guards on both preconditions
plus a dispatcher-side comment clarifying the i*2+j semantics.
Cross-refs:
- ~/src/panvk-bifrost/iter19/phase{0,1,2,3}_holes_vert*.md
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
marfrit-packages
Overlay package repository for the reauktion.de infrastructure.
Published at: https://packages.reauktion.de/
Scope
| Tree | Arches | Notes |
|---|---|---|
| Arch Linux ARM (ALARM) | aarch64 |
primary target — Pi 5, Rock 5, ampere, KU-1255 test rigs |
| Arch Linux | x86_64 |
for nuccies / workstations |
| Debian | arm64, amd64 |
for non-Arch hosts |
MIPS is intentionally unsupported. The Fritz!Box is sacred.
Layout (served at packages.reauktion.de)
packages.reauktion.de/
├── arch/
│ ├── aarch64/{marfrit.db,marfrit.files,*.pkg.tar.{xz,zst}{,.sig}}
│ └── x86_64/...
├── debian/
│ ├── dists/
│ │ ├── bookworm/{Release,InRelease,Release.gpg,main/binary-{arm64,amd64}/...}
│ │ └── trixie/...
│ └── pool/main/...
└── marfrit.gpg # public signing key
Adding the repo (Arch / ALARM)
curl -sO https://packages.reauktion.de/marfrit.gpg
sudo pacman-key --add marfrit.gpg
sudo pacman-key --lsign-key 92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C
# Paste at the end of /etc/pacman.conf:
[marfrit]
Server = https://packages.reauktion.de/arch/$arch
SigLevel = Required DatabaseRequired
sudo pacman -Sy
Adding the repo (Debian)
sudo install -m 755 -d /etc/apt/keyrings
curl -s https://packages.reauktion.de/marfrit.gpg | \
sudo gpg --dearmor -o /etc/apt/keyrings/marfrit.gpg
echo "deb [signed-by=/etc/apt/keyrings/marfrit.gpg] https://packages.reauktion.de/debian $(lsb_release -cs) main" | \
sudo tee /etc/apt/sources.list.d/marfrit.list
sudo apt update
Signing key
- Fingerprint:
92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C - UID:
Markus Fritsche (marfrit-repo signing) <mfritsche@reauktion.de> - Expires: 2030-04-13
Key management procedures (renewal, rotation, revocation) live in DokuWiki at private:reauktion:marfrit_repo_key (admin-only).
Layout in this Git repo
marfrit-packages/
├── README.md
├── arch/
│ └── distcc-avahi/ # ALARM distcc with --with-avahi
├── debian/ # (future) Debian source packages
└── .gitea/
└── workflows/
└── build.yml # CI pipeline stub
mfritsche@reauktion.de.