Compile aarch64 Linux kernel Upstream for Raspberry Pi
This is a guide how to compile and install 64 bit (aarch64) kernel for the Raspberry pi 3 b, 3 b+ or 4.
Install build tools
sudo apt-get install build-essential libgmp-dev libmpfr-dev libmpc-dev bc git-core binutils-aarch64-linux-gnu gcc-aarch64-linux-gnu cpp-aarch64-linux-gnu g++-aarch64-linux-gnu libncurses-dev
Clone Linux kernel sources
git clone https://github.com/raspberrypi/linux.git rpi3-kernel
cd rpi3-kernel
Create output folder
mkdir ../out
Compile kernel
make O=../out/ ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bcmrpi3_defconfig
make -j4 O=../out/ ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
mkdir ../out/out-modules/
make O=../out/ ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- INSTALL_MOD_PATH=../out/out-modules/ modules_install
Install (plug the sdcard and replace sdX with your device)
mount /dev/sdX1 /media/
cd ../out/
rm -rf /media/overlays
cp -R arch/arm64/boot/dts/overlays /media/
cp arch/arm64/boot/Image /media/kernel8.img
cp arch/arm64/boot/dts/broadcom/bcm2710-rpi-3-b.dtb /media/bcm2710-rpi-3-b.dtb
echo "arm_64bit=1" >> /media/config.txt
echo "kernel=kernel8.img" >> /media/config.txt
umount /media
mount /dev/sdX2 /media/
cd out-modules/lib/modules/
cp -R 4.14.* /media/lib/modules/
umount /media