feat: add ARM64 kernel build support #13
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jakubno
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Feb 9, 2026
build.sh
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| if [[ "$TARGET_ARCH" == "arm64" ]]; then | ||
| cp ../configs/arm64/"${version}.config" .config | ||
| else | ||
| cp ../configs/"${version}.config" .config | ||
| fi |
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wouldn't it make sense to simplify
Suggested change
| if [[ "$TARGET_ARCH" == "arm64" ]]; then | |
| cp ../configs/arm64/"${version}.config" .config | |
| else | |
| cp ../configs/"${version}.config" .config | |
| fi | |
| cp ../configs/"$TARGET_ARCH"/"${version}.config" .config |
build.sh
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| echo "Copying finished build to builds directory" | ||
| mkdir -p "../builds/vmlinux-${version}" | ||
| cp vmlinux "../builds/vmlinux-${version}/vmlinux.bin" | ||
| # Output path: arm64 builds go into a subdirectory to distinguish from x86_64 |
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you could simplify here, if you change as suggested
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- Move x86_64 configs to configs/x86_64/ (keep legacy configs/ for now)
- Add arm64 configs in configs/arm64/ (Firecracker reference + NFS v3, WireGuard, NFSD)
- build.sh: TARGET_ARCH env var, configs from configs/{arch}/, cross-compile support
- x86_64 outputs to both legacy path and x86_64/ subdir for backwards compat
- GH Action: matrix build for both architectures, merged artifacts
Output structure:
builds/vmlinux-{ver}/vmlinux.bin # x86_64 legacy (backwards compat)
builds/vmlinux-{ver}/x86_64/vmlinux.bin # x86_64 new
builds/vmlinux-{ver}/arm64/vmlinux.bin # arm64 new
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jakubno
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Feb 10, 2026
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Summary
configs/arm64/) based on upstream Firecracker aarch64 reference config, with E2B-specific additions (NFS v3, WireGuard, NFSD)build.sh:TARGET_ARCHenv var (x86_64default,arm64), cross-compiles viagcc-aarch64-linux-gnuwhen building on x86_64 hostsMakefile:build-arm64convenience targetarm64 kernels output to
builds/vmlinux-{version}/arm64/vmlinux.bin, so GCS gets:Test plan
file vmlinux.bin→ELF 64-bit LSB ... ARM aarch64Note
Medium Risk
Changes the kernel build/publish pipeline and output layout, so misconfiguration could break CI releases or downstream consumers despite legacy x86_64 compatibility handling.
Overview
Adds ARM64 kernel build support by introducing
configs/arm64/*and updatingbuild.shto build per-architecture viaTARGET_ARCH(including optional cross-compilation on x86_64 hosts).Updates the GitHub Actions workflow to run a build matrix for
x86_64andarm64, upload per-arch artifacts, then onmaindownload/merge those artifacts and publish to GCS and GitHub Releases with arch-aware asset naming while keeping legacy x86_64 output paths for compatibility. Also adds amake build-arm64convenience target.Written by Cursor Bugbot for commit 8f588da. This will update automatically on new commits. Configure here.