Hi Joerg, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/joro/linux.git sev-es-client-tip-5.9 head: 7e2e0f5fb47e16dec0e6b81ce2ee36abb4c28eb9 commit: 35d875a68ff6c7753a1dde4507599371e65cc3aa [41/76] x86/sev-es: Compile early handler code into kernel image config: x86_64-randconfig-m001-20200818 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; New smatch warnings: arch/x86/kernel/sev-es-shared.c:267 vc_ioio_exitinfo() warn: should 'insn->immediate.value << 16' be a 64 bit type? Old smatch warnings: arch/x86/kernel/sev-es-shared.c:274 vc_ioio_exitinfo() warn: should 'insn->immediate.value << 16' be a 64 bit type? # https://git.kernel.org/pub/scm/linux/kernel/git/joro/linux.git/commit/?id... git remote add joro https://git.kernel.org/pub/scm/linux/kernel/git/joro/linux.git git fetch --no-tags joro sev-es-client-tip-5.9 git checkout 35d875a68ff6c7753a1dde4507599371e65cc3aa vim +267 arch/x86/kernel/sev-es-shared.c 3baee4b43311883 Tom Lendacky 2020-07-24 240 3baee4b43311883 Tom Lendacky 2020-07-24 241 static enum es_result vc_ioio_exitinfo(struct es_em_ctxt *ctxt, u64 *exitinfo) 3baee4b43311883 Tom Lendacky 2020-07-24 242 { 3baee4b43311883 Tom Lendacky 2020-07-24 243 struct insn *insn = &ctxt->insn; 3baee4b43311883 Tom Lendacky 2020-07-24 244 *exitinfo = 0; 3baee4b43311883 Tom Lendacky 2020-07-24 245 3baee4b43311883 Tom Lendacky 2020-07-24 246 switch (insn->opcode.bytes[0]) { 3baee4b43311883 Tom Lendacky 2020-07-24 247 /* INS opcodes */ 3baee4b43311883 Tom Lendacky 2020-07-24 248 case 0x6c: 3baee4b43311883 Tom Lendacky 2020-07-24 249 case 0x6d: 3baee4b43311883 Tom Lendacky 2020-07-24 250 *exitinfo |= IOIO_TYPE_INS; 3baee4b43311883 Tom Lendacky 2020-07-24 251 *exitinfo |= IOIO_SEG_ES; 3baee4b43311883 Tom Lendacky 2020-07-24 252 *exitinfo |= (ctxt->regs->dx & 0xffff) << 16; 3baee4b43311883 Tom Lendacky 2020-07-24 253 break; 3baee4b43311883 Tom Lendacky 2020-07-24 254 3baee4b43311883 Tom Lendacky 2020-07-24 255 /* OUTS opcodes */ 3baee4b43311883 Tom Lendacky 2020-07-24 256 case 0x6e: 3baee4b43311883 Tom Lendacky 2020-07-24 257 case 0x6f: 3baee4b43311883 Tom Lendacky 2020-07-24 258 *exitinfo |= IOIO_TYPE_OUTS; 3baee4b43311883 Tom Lendacky 2020-07-24 259 *exitinfo |= IOIO_SEG_DS; 3baee4b43311883 Tom Lendacky 2020-07-24 260 *exitinfo |= (ctxt->regs->dx & 0xffff) << 16; 3baee4b43311883 Tom Lendacky 2020-07-24 261 break; 3baee4b43311883 Tom Lendacky 2020-07-24 262 3baee4b43311883 Tom Lendacky 2020-07-24 263 /* IN immediate opcodes */ 3baee4b43311883 Tom Lendacky 2020-07-24 264 case 0xe4: 3baee4b43311883 Tom Lendacky 2020-07-24 265 case 0xe5: 3baee4b43311883 Tom Lendacky 2020-07-24 266 *exitinfo |= IOIO_TYPE_IN; 3baee4b43311883 Tom Lendacky 2020-07-24 @267 *exitinfo |= insn->immediate.value << 16; 3baee4b43311883 Tom Lendacky 2020-07-24 268 break; 3baee4b43311883 Tom Lendacky 2020-07-24 269 3baee4b43311883 Tom Lendacky 2020-07-24 270 /* OUT immediate opcodes */ 3baee4b43311883 Tom Lendacky 2020-07-24 271 case 0xe6: 3baee4b43311883 Tom Lendacky 2020-07-24 272 case 0xe7: 3baee4b43311883 Tom Lendacky 2020-07-24 273 *exitinfo |= IOIO_TYPE_OUT; 3baee4b43311883 Tom Lendacky 2020-07-24 274 *exitinfo |= insn->immediate.value << 16; 3baee4b43311883 Tom Lendacky 2020-07-24 275 break; 3baee4b43311883 Tom Lendacky 2020-07-24 276 3baee4b43311883 Tom Lendacky 2020-07-24 277 /* IN register opcodes */ 3baee4b43311883 Tom Lendacky 2020-07-24 278 case 0xec: 3baee4b43311883 Tom Lendacky 2020-07-24 279 case 0xed: 3baee4b43311883 Tom Lendacky 2020-07-24 280 *exitinfo |= IOIO_TYPE_IN; 3baee4b43311883 Tom Lendacky 2020-07-24 281 *exitinfo |= (ctxt->regs->dx & 0xffff) << 16; 3baee4b43311883 Tom Lendacky 2020-07-24 282 break; 3baee4b43311883 Tom Lendacky 2020-07-24 283 3baee4b43311883 Tom Lendacky 2020-07-24 284 /* OUT register opcodes */ 3baee4b43311883 Tom Lendacky 2020-07-24 285 case 0xee: 3baee4b43311883 Tom Lendacky 2020-07-24 286 case 0xef: 3baee4b43311883 Tom Lendacky 2020-07-24 287 *exitinfo |= IOIO_TYPE_OUT; 3baee4b43311883 Tom Lendacky 2020-07-24 288 *exitinfo |= (ctxt->regs->dx & 0xffff) << 16; 3baee4b43311883 Tom Lendacky 2020-07-24 289 break; 3baee4b43311883 Tom Lendacky 2020-07-24 290 3baee4b43311883 Tom Lendacky 2020-07-24 291 default: 3baee4b43311883 Tom Lendacky 2020-07-24 292 return ES_DECODE_FAILED; 3baee4b43311883 Tom Lendacky 2020-07-24 293 } 3baee4b43311883 Tom Lendacky 2020-07-24 294 3baee4b43311883 Tom Lendacky 2020-07-24 295 switch (insn->opcode.bytes[0]) { 3baee4b43311883 Tom Lendacky 2020-07-24 296 case 0x6c: 3baee4b43311883 Tom Lendacky 2020-07-24 297 case 0x6e: 3baee4b43311883 Tom Lendacky 2020-07-24 298 case 0xe4: 3baee4b43311883 Tom Lendacky 2020-07-24 299 case 0xe6: 3baee4b43311883 Tom Lendacky 2020-07-24 300 case 0xec: 3baee4b43311883 Tom Lendacky 2020-07-24 301 case 0xee: 3baee4b43311883 Tom Lendacky 2020-07-24 302 /* Single byte opcodes */ 3baee4b43311883 Tom Lendacky 2020-07-24 303 *exitinfo |= IOIO_DATA_8; 3baee4b43311883 Tom Lendacky 2020-07-24 304 break; 3baee4b43311883 Tom Lendacky 2020-07-24 305 default: 3baee4b43311883 Tom Lendacky 2020-07-24 306 /* Length determined by instruction parsing */ 3baee4b43311883 Tom Lendacky 2020-07-24 307 *exitinfo |= (insn->opnd_bytes == 2) ? IOIO_DATA_16 3baee4b43311883 Tom Lendacky 2020-07-24 308 : IOIO_DATA_32; 3baee4b43311883 Tom Lendacky 2020-07-24 309 } 3baee4b43311883 Tom Lendacky 2020-07-24 310 switch (insn->addr_bytes) { 3baee4b43311883 Tom Lendacky 2020-07-24 311 case 2: 3baee4b43311883 Tom Lendacky 2020-07-24 312 *exitinfo |= IOIO_ADDR_16; 3baee4b43311883 Tom Lendacky 2020-07-24 313 break; 3baee4b43311883 Tom Lendacky 2020-07-24 314 case 4: 3baee4b43311883 Tom Lendacky 2020-07-24 315 *exitinfo |= IOIO_ADDR_32; 3baee4b43311883 Tom Lendacky 2020-07-24 316 break; 3baee4b43311883 Tom Lendacky 2020-07-24 317 case 8: 3baee4b43311883 Tom Lendacky 2020-07-24 318 *exitinfo |= IOIO_ADDR_64; 3baee4b43311883 Tom Lendacky 2020-07-24 319 break; 3baee4b43311883 Tom Lendacky 2020-07-24 320 } 3baee4b43311883 Tom Lendacky 2020-07-24 321 3baee4b43311883 Tom Lendacky 2020-07-24 322 if (insn_has_rep_prefix(insn)) 3baee4b43311883 Tom Lendacky 2020-07-24 323 *exitinfo |= IOIO_REP; 3baee4b43311883 Tom Lendacky 2020-07-24 324 3baee4b43311883 Tom Lendacky 2020-07-24 325 return ES_OK; 3baee4b43311883 Tom Lendacky 2020-07-24 326 } 3baee4b43311883 Tom Lendacky 2020-07-24 327 :::::: The code at line 267 was first introduced by commit :::::: 3baee4b43311883285fb9c7e1f0f79383f25e0a4 x86/sev-es: Add support for handling IOIO exceptions :::::: TO: Tom Lendacky <thomas.lendacky(a)amd.com&gt; :::::: CC: Joerg Roedel <jroedel(a)suse.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org