reproduce (this is a W=1 build):
        git remote add opencloudos https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
        git fetch --no-tags opencloudos linux-5.4/lts/5.4.119-20.0009.spr
        git checkout a1da309e870a12423d7e17373a738cdeb57fc4f9
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/apic/ arch/x86/platform/uv/ drivers/gpu/drm/i915/gvt/ drivers/xen/