tree: https://github.com/intel/tdx.git guest head: e7490da06ee4b49b02a0b8c0580a068539264044 commit: 52196bf062003d2f8073cbc0998f4a248d9e29a7 [90/110] x86/tdx: Make RDRAND/RDSEED loop forever config: x86_64-randconfig-a006-20210809 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/intel/tdx/commit/52196bf062003d2f8073cbc0998f4a248d9e29a7 git remote add intel-tdx https://github.com/intel/tdx.git git fetch --no-tags intel-tdx guest git checkout 52196bf062003d2f8073cbc0998f4a248d9e29a7 # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: arch/x86/boot/compressed/kaslr.o: in function `kaslr_get_random_long': ld: arch/x86/boot/compressed/vmlinux: hidden symbol `amd_prot_guest_has' isn't defined ld: final link failed: bad value --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org