reproduce (this is a W=1 build):
        # https://github.com/LuBaolu/intel-iommu/commit/e1e6373a563efdd8fc62cc372fa7147243167eca
        git remote add lubaolu-intel-iommu https://github.com/LuBaolu/intel-iommu.git
        git fetch --no-tags lubaolu-intel-iommu iommu/tdxc/enablement-alpha-v4
        git checkout e1e6373a563efdd8fc62cc372fa7147243167eca

        # 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