reproduce (this is a W=1 build):
        git checkout 7d0a66e4bb9081d75c82ec4957c50034cb0ea449
        b4 shazam https://lore.kernel.org/r/20251212135051.2155280-1-xiaoyao.li@intel.com

        # 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/