KVM does not support nest virtualization by default, we need to do some modification from kernel side.

Setup an enviroment for qemu/kvm with libvirt and virt-manager.

Set up git proxy, so could use git clone under proxy enviroment

Solve the problem that reinstall driver when switching kernel.

This article is about steps to cross-compile arm64 linux kernel, and common error when you building. You could build it in X86-64 OS or direct under aarch64 OS.