tree: https://github.com/intel/tdx.git guest head: 41fe88a1b3c28543f49fa6ed9e0e9b6650ed7614 commit: 7315ae7f753386e793da1941e073c4cb1112e767 [54/144] x86/tdx: Add SetupEventNotifyInterrupt TDX hypercall support config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20211208/202112080412.ewbt4zCb-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/intel/tdx/commit/7315ae7f753386e793da1941e073c4cb1112e767 git remote add intel-tdx https://github.com/intel/tdx.git git fetch --no-tags intel-tdx guest git checkout 7315ae7f753386e793da1941e073c4cb1112e767 # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 225 | int tdx_hcall_set_notify_intr(u8 vector) | ^~~~~~~~~~~~~~~~~~~~~~~~~ vim +/tdx_hcall_set_notify_intr +225 arch/x86/kernel/tdx.c 217 218 /* 219 * tdx_hcall_set_notify_intr() - Setup Event Notify Interrupt Vector. 220 * 221 * @vector : Vector address to be used for notification. 222 * 223 * return 0 on success or failure error number. 224 */ 226 { 227 u64 ret; 228 229 /* Minimum vector value allowed is 32 */ 230 if (vector < 32) 231 return -EINVAL; 232 233 /* 234 * Register callback vector address with VMM. More details 235 * about the ABI can be found in TDX Guest-Host-Communication 236 * Interface (GHCI), sec 3.5. 237 */ 238 ret = _trace_tdx_hypercall(TDVMCALL_SETUP_NOTIFY_INTR, vector, 0, 0, 0, 239 NULL); 240 241 if (ret == TDVMCALL_SUCCESS) 242 return 0; 243 else if (ret == TDCALL_INVALID_OPERAND) 244 return -EINVAL; 245 246 return -EIO; 247 } 248 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org