reproduce (this is a W=1 build):
        # https://github.com/intel/tdx/commit/ee47fd5c9471109b9fb20d3ada309b7836e5f639
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx mig-dpamt-v3
        git checkout ee47fd5c9471109b9fb20d3ada309b7836e5f639
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/kvm/