Hi Dov, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on 42eb8fdac2fc5d62392dcfcf0253753e821a97b0] url: https://github.com/0day-ci/linux/commits/Dov-Murik/Allow-guest-access-to-... base: 42eb8fdac2fc5d62392dcfcf0253753e821a97b0 config: riscv-allyesconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/547e54014b34e24cd885e941dd66e3fde... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Dov-Murik/Allow-guest-access-to-EFI-confidential-computing-secret-area/20211118-193724 git checkout 547e54014b34e24cd885e941dd66e3fdece3c0c6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=riscv 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 >>): drivers/virt/coco/efi_secret/efi_secret.c: In function 'efi_secret_map_area': drivers/virt/coco/efi_secret/efi_secret.c:181:26: error: implicit declaration of function 'ioremap_encrypted' [-Werror=implicit-function-declaration] 181 | s->secret_data = ioremap_encrypted(secret_area->base_pa, secret_area->size); | ^~~~~~~~~~~~~~~~~ 181 | s->secret_data = ioremap_encrypted(secret_area->base_pa, secret_area->size); | ^ cc1: some warnings being treated as errors vim +181 drivers/virt/coco/efi_secret/efi_secret.c 157 158 static int efi_secret_map_area(void) 159 { 160 int ret; 161 struct efi_secret *s = efi_secret_get(); 162 struct linux_efi_coco_secret_area *secret_area; 163 164 if (efi.coco_secret == EFI_INVALID_TABLE_ADDR) { 165 pr_err("Secret area address is not available\n"); 166 return -EINVAL; 167 } 168 169 secret_area = memremap(efi.coco_secret, sizeof(*secret_area), MEMREMAP_WB); 170 if (secret_area == NULL) { 171 pr_err("Could not map secret area EFI config entry\n"); 172 return -ENOMEM; 173 } 174 if (!secret_area->base_pa || secret_area->size < sizeof(struct secret_header)) { 175 pr_err("Invalid secret area memory location (base_pa=0x%llx size=0x%llx)\n", 176 secret_area->base_pa, secret_area->size); 177 ret = -EINVAL; 178 goto unmap; 179 } 180 182 if (s->secret_data == NULL) { 183 pr_err("Could not map secret area\n"); 184 ret = -ENOMEM; 185 goto unmap; 186 } 187 188 s->secret_data_len = secret_area->size; 189 ret = 0; 190 191 unmap: 192 memunmap(secret_area); 193 return ret; 194 } 195 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org