内核编译

本文档介绍内核编译和更新的详细过程。操作目录：${WORKDIR}

须知：
当前只有 6.6 版本的树莓派内核同时支持树莓派 5 和树莓派 3B/3B+/4B/400，其他内核版本只支持树莓派 3B/3B+/4B/400。

下载内核源码

根据内核不同版本，需要下载不同仓库的不同分支：

6.6 内核
- openEuler 25.03：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b openEuler-25.03 && cd raspberrypi-kernel
- openEuler 24.09/24.03 LTS/24.03 LTS SP1/24.03 LTS SP2/24.03 LTS SP3：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b OLK-6.6 && cd raspberrypi-kernel
- openEuler 25.09：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b openEuler-25.09 && cd raspberrypi-kernel
6.1 内核
- openEuler 23.03：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b openEuler-23.03 && cd raspberrypi-kernel
5.10 内核
- openEuler 22.03 LTS SP3/22.03 LTS SP4：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b OLK-5.10 && cd raspberrypi-kernel
- openEuler 22.03 LTS SP2：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b openEuler-22.03-LTS-SP2 && cd raspberrypi-kernel
- openEuler 22.03 LTS SP1：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b openEuler-22.03-LTS-SP1 && cd raspberrypi-kernel
- openEuler 22.09：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b openEuler-22.09 && cd raspberrypi-kernel
- openEuler 22.03 LTS：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b openEuler-22.03-LTS && cd raspberrypi-kernel
- openEuler 21.09：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b openEuler-21.09 && cd raspberrypi-kernel
- openEuler 21.03：git clone git@atomgit.com:openeuler/kernel.git -b openEuler-21.03 && cd kernel
4.19 内核
- openEuler 20.03 LTS：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b openEuler-20.03-LTS && cd raspberrypi-kernel
- openEuler 20.09：git clone git@atomgit.com:openeuler/raspberrypi-kernel.git -b openEuler-20.09 && cd raspberrypi-kernel

载入默认配置

根据内核不同版本，需要载入不同的默认配置：

6.6 内核
- openEuler 24.03 LTS/24.03 LTS SP1/25.03/24.03 LTS SP2/25.09/24.03 LTS SP3：
  - 树莓派 5：make ARCH=arm64 O=output/2712 bcm2712_defconfig
  - 树莓派 4B：make ARCH=arm64 O=output/v8 bcm2711_defconfig
- openEuler 24.09：make ARCH=arm64 bcm2711_defconfig
6.1 内核
- openEuler 23.03：make ARCH=arm64 bcm2711_defconfig
5.10 内核

make ARCH=arm64 bcm2711_defconfig
4.19 内核

make ARCH=arm64 openeuler-raspi_defconfig

对应的 defconfig 文件在 ./arch/arm64/configs 下。

编译内核

6.6 内核
- 树莓派 5：make ARCH=arm64 -j$(nproc) O=output/2712 KERNELRELEASE=6.6-2712
- 树莓派 4B：make ARCH=arm64 -j$(nproc) O=output/v8 KERNELRELEASE=6.6-v8
6.1/5.10/4.19 内核：make ARCH=arm64 -j$(nproc)

创建新内核收集目录

6.6 内核
- 树莓派 5：mkdir ${WORKDIR}/output-2712
- 树莓派 4B：mkdir ${WORKDIR}/output-v8
6.1/5.10/4.19 内核：mkdir ${WORKDIR}/output

安装内核模块

6.6 内核
- 树莓派 5：make ARCH=arm64 -j$(nproc) INSTALL_MOD_PATH=${WORKDIR}/output-2712 modules_install KERNELRELEASE=6.6-2712
- 树莓派 4B：make ARCH=arm64 -j$(nproc) INSTALL_MOD_PATH=${WORKDIR}/output-v8 modules_install KERNELRELEASE=6.6-v8
6.1/5.10/4.19 内核：make ARCH=arm64 -j$(nproc) INSTALL_MOD_PATH=${WORKDIR}/output modules_install

在 ${WORKDIR}/output-2712、${WORKDIR}/output-v8 或 ${WORKDIR}/output 文件夹下会生成 lib 文件夹。

收集编译结果

内核
- 6.6 内核
  - 树莓派 5：cp ${WORKDIR}/raspberrypi-kernel/output/2712/arch/arm64/boot/Image ${WORKDIR}/output-2712/
  - 树莓派 4B：cp ${WORKDIR}/raspberrypi-kernel/output/v8/arch/arm64/boot/Image ${WORKDIR}/output-v8/
- 6.1/5.10/4.19 内核：cp ${WORKDIR}/raspberrypi-kernel/arch/arm64/boot/Image ${WORKDIR}/output/

设备树文件等

6.6 内核

树莓派 5：

cp ${WORKDIR}/raspberrypi-kernel/output/2712/arch/arm64/boot/dts/broadcom/*.dtb ${WORKDIR}/output-2712/
mkdir ${WORKDIR}/output-2712/overlays
cp ${WORKDIR}/raspberrypi-kernel/output/2712/arch/arm64/boot/dts/overlays/*.dtb* ${WORKDIR}/output-2712/overlays/

树莓派 4B：

cp ${WORKDIR}/raspberrypi-kernel/output/v8/arch/arm64/boot/dts/broadcom/*.dtb ${WORKDIR}/output-v8/
mkdir ${WORKDIR}/output-v8/overlays
cp ${WORKDIR}/raspberrypi-kernel/output/v8/arch/arm64/boot/dts/overlays/*.dtb* ${WORKDIR}/output-v8/overlays/

6.1/5.10/4.19 内核

cp ${WORKDIR}/raspberrypi-kernel/arch/arm64/boot/dts/broadcom/*.dtb ${WORKDIR}/output/
mkdir ${WORKDIR}/output/overlays
cp ${WORKDIR}/raspberrypi-kernel/arch/arm64/boot/dts/overlays/*.dtb* ${WORKDIR}/output/overlays/

至此，所有内核及内核模块相关内容都在 ${WORKDIR}/output-2712、${WORKDIR}/output-v8 或 ${WORKDIR}/output 下了。

内核更新

这里 ${boot} 和 ${rootfs} 分别表示待更新系统或镜像文件的 boot 和 root 分区的挂载目录。

将内核放进引导
- 6.6 内核
  - 树莓派 5：cp ${WORKDIR}/output-2712/Image ${boot}/kernel_2712.img
  - 树莓派 4B：cp ${WORKDIR}/output-v8/Image ${boot}/kernel8.img
- 6.1/5.10/4.19 内核：cp ${WORKDIR}/output/Image ${boot}/kernel8.img

将设备树文件放进引导