Android GKI Kernel for Xiaomi POCO F5 (marble)

Custom Linux 5.10 GKI (Google Kernel Image) kernel source tree for Xiaomi POCO F5 (marble / Snapdragon 7+ Gen 2), optimized for low latency, high throughput, and full GKI ABI compatibility.

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🛠 Features & Architecture Highlights

Kernel Infrastructure & Compilation

• Toolchain: Clang 17 / LLVM ThinLTO (CONFIG_LTO_CLANG_THIN=y).
• GKI ABI Preservation: CONFIG_SLUB_DEBUG=y and CONFIG_UNMAP_KERNEL_AT_EL0=y fully maintained for 100% ABI compatibility with stock Xiaomi vendor modules (msm_kgsl, wlan, camera).
• Out-of-Tree Driver Support:
  • Unconditional export of __stack_chk_guard in arch/arm64/kernel/process.c.
  • CRC version check bypass in kernel/module.c (check_version()).
  • Control Flow Integrity (CFI) trap handler bypass in kernel/cfi.c (cfi_slowpath_handler()).

Networking & Schedulers

• TCP Congestion Control: TCP BBR enabled (CONFIG_TCP_CONG_BBR=y) with Fair Queue (CONFIG_NET_SCH_FQ=y) packet pacing.
• CPU Scheduling: Utilization Clamping (CONFIG_UCLAMP_TASK=y, CONFIG_UCLAMP_TASK_GROUP=y) enabled for instant CPU frequency scaling on foreground workloads.

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📦 Building

This kernel is built automatically using GitHub Actions.

Manual Build Requirements

• Clang 17.0.6 or higher (Android NDK r26 / AOSP Clang).
• aarch64-linux-android- cross compiler toolchain.

make ARCH=arm64 O=out marble_defconfig
make ARCH=arm64 O=out -j$(nproc)

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📄 License

This project is licensed under the terms of the GNU General Public License v2.0 (GPL-2.0).