1 /* 2 * CPU models for s390x 3 * 4 * Copyright 2016 IBM Corp. 5 * 6 * Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com> 7 * 8 * This work is licensed under the terms of the GNU GPL, version 2 or (at 9 * your option) any later version. See the COPYING file in the top-level 10 * directory. 11 */ 12 13 #include "qemu/osdep.h" 14 #include "cpu.h" 15 #include "gen-features.h" 16 #include "qapi/error.h" 17 #include "qapi/visitor.h" 18 #include "qemu/error-report.h" 19 #include "qapi/qmp/qerror.h" 20 #include "qapi/qobject-input-visitor.h" 21 #include "qapi/qmp/qbool.h" 22 #ifndef CONFIG_USER_ONLY 23 #include "sysemu/arch_init.h" 24 #endif 25 26 #define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \ 27 { \ 28 .name = _name, \ 29 .type = _type, \ 30 .gen = _gen, \ 31 .ec_ga = _ec_ga, \ 32 .mha_pow = _mha_pow, \ 33 .hmfai = _hmfai, \ 34 .desc = _desc, \ 35 .base_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _BASE }, \ 36 .default_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _DEFAULT }, \ 37 .full_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _FULL }, \ 38 } 39 40 /* 41 * CPU definiton list in order of release. For now, base features of a 42 * following release are always a subset of base features of the previous 43 * release. Same is correct for the other feature sets. 44 * A BC release always follows the corresponding EC release. 45 */ 46 static S390CPUDef s390_cpu_defs[] = { 47 CPUDEF_INIT(0x2064, 7, 1, 38, 0x00000000U, "z900", "IBM zSeries 900 GA1"), 48 CPUDEF_INIT(0x2064, 7, 2, 38, 0x00000000U, "z900.2", "IBM zSeries 900 GA2"), 49 CPUDEF_INIT(0x2064, 7, 3, 38, 0x00000000U, "z900.3", "IBM zSeries 900 GA3"), 50 CPUDEF_INIT(0x2066, 7, 3, 38, 0x00000000U, "z800", "IBM zSeries 800 GA1"), 51 CPUDEF_INIT(0x2084, 8, 1, 38, 0x00000000U, "z990", "IBM zSeries 990 GA1"), 52 CPUDEF_INIT(0x2084, 8, 2, 38, 0x00000000U, "z990.2", "IBM zSeries 990 GA2"), 53 CPUDEF_INIT(0x2084, 8, 3, 38, 0x00000000U, "z990.3", "IBM zSeries 990 GA3"), 54 CPUDEF_INIT(0x2086, 8, 3, 38, 0x00000000U, "z890", "IBM zSeries 880 GA1"), 55 CPUDEF_INIT(0x2084, 8, 4, 38, 0x00000000U, "z990.4", "IBM zSeries 990 GA4"), 56 CPUDEF_INIT(0x2086, 8, 4, 38, 0x00000000U, "z890.2", "IBM zSeries 880 GA2"), 57 CPUDEF_INIT(0x2084, 8, 5, 38, 0x00000000U, "z990.5", "IBM zSeries 990 GA5"), 58 CPUDEF_INIT(0x2086, 8, 5, 38, 0x00000000U, "z890.3", "IBM zSeries 880 GA3"), 59 CPUDEF_INIT(0x2094, 9, 1, 40, 0x00000000U, "z9EC", "IBM System z9 EC GA1"), 60 CPUDEF_INIT(0x2094, 9, 2, 40, 0x00000000U, "z9EC.2", "IBM System z9 EC GA2"), 61 CPUDEF_INIT(0x2096, 9, 2, 40, 0x00000000U, "z9BC", "IBM System z9 BC GA1"), 62 CPUDEF_INIT(0x2094, 9, 3, 40, 0x00000000U, "z9EC.3", "IBM System z9 EC GA3"), 63 CPUDEF_INIT(0x2096, 9, 3, 40, 0x00000000U, "z9BC.2", "IBM System z9 BC GA2"), 64 CPUDEF_INIT(0x2097, 10, 1, 43, 0x00000000U, "z10EC", "IBM System z10 EC GA1"), 65 CPUDEF_INIT(0x2097, 10, 2, 43, 0x00000000U, "z10EC.2", "IBM System z10 EC GA2"), 66 CPUDEF_INIT(0x2098, 10, 2, 43, 0x00000000U, "z10BC", "IBM System z10 BC GA1"), 67 CPUDEF_INIT(0x2097, 10, 3, 43, 0x00000000U, "z10EC.3", "IBM System z10 EC GA3"), 68 CPUDEF_INIT(0x2098, 10, 3, 43, 0x00000000U, "z10BC.2", "IBM System z10 BC GA2"), 69 CPUDEF_INIT(0x2817, 11, 1, 44, 0x08000000U, "z196", "IBM zEnterprise 196 GA1"), 70 CPUDEF_INIT(0x2817, 11, 2, 44, 0x08000000U, "z196.2", "IBM zEnterprise 196 GA2"), 71 CPUDEF_INIT(0x2818, 11, 2, 44, 0x08000000U, "z114", "IBM zEnterprise 114 GA1"), 72 CPUDEF_INIT(0x2827, 12, 1, 44, 0x08000000U, "zEC12", "IBM zEnterprise EC12 GA1"), 73 CPUDEF_INIT(0x2827, 12, 2, 44, 0x08000000U, "zEC12.2", "IBM zEnterprise EC12 GA2"), 74 CPUDEF_INIT(0x2828, 12, 2, 44, 0x08000000U, "zBC12", "IBM zEnterprise BC12 GA1"), 75 CPUDEF_INIT(0x2964, 13, 1, 47, 0x08000000U, "z13", "IBM z13 GA1"), 76 CPUDEF_INIT(0x2964, 13, 2, 47, 0x08000000U, "z13.2", "IBM z13 GA2"), 77 CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"), 78 }; 79 80 uint32_t s390_get_hmfai(void) 81 { 82 static S390CPU *cpu; 83 84 if (!cpu) { 85 cpu = S390_CPU(qemu_get_cpu(0)); 86 } 87 88 if (!cpu || !cpu->model) { 89 return 0; 90 } 91 return cpu->model->def->hmfai; 92 } 93 94 uint8_t s390_get_mha_pow(void) 95 { 96 static S390CPU *cpu; 97 98 if (!cpu) { 99 cpu = S390_CPU(qemu_get_cpu(0)); 100 } 101 102 if (!cpu || !cpu->model) { 103 return 0; 104 } 105 return cpu->model->def->mha_pow; 106 } 107 108 uint32_t s390_get_ibc_val(void) 109 { 110 uint16_t unblocked_ibc, lowest_ibc; 111 static S390CPU *cpu; 112 113 if (!cpu) { 114 cpu = S390_CPU(qemu_get_cpu(0)); 115 } 116 117 if (!cpu || !cpu->model) { 118 return 0; 119 } 120 unblocked_ibc = s390_ibc_from_cpu_model(cpu->model); 121 lowest_ibc = cpu->model->lowest_ibc; 122 /* the lowest_ibc always has to be <= unblocked_ibc */ 123 if (!lowest_ibc || lowest_ibc > unblocked_ibc) { 124 return 0; 125 } 126 return ((uint32_t) lowest_ibc << 16) | unblocked_ibc; 127 } 128 129 void s390_get_feat_block(S390FeatType type, uint8_t *data) 130 { 131 static S390CPU *cpu; 132 133 if (!cpu) { 134 cpu = S390_CPU(qemu_get_cpu(0)); 135 } 136 137 if (!cpu || !cpu->model) { 138 return; 139 } 140 s390_fill_feat_block(cpu->model->features, type, data); 141 } 142 143 bool s390_has_feat(S390Feat feat) 144 { 145 static S390CPU *cpu; 146 147 if (!cpu) { 148 cpu = S390_CPU(qemu_get_cpu(0)); 149 } 150 151 if (!cpu || !cpu->model) { 152 #ifdef CONFIG_KVM 153 if (kvm_enabled()) { 154 if (feat == S390_FEAT_VECTOR) { 155 return kvm_check_extension(kvm_state, 156 KVM_CAP_S390_VECTOR_REGISTERS); 157 } 158 if (feat == S390_FEAT_RUNTIME_INSTRUMENTATION) { 159 return kvm_s390_get_ri(); 160 } 161 if (feat == S390_FEAT_MSA_EXT_3) { 162 return true; 163 } 164 } 165 #endif 166 return 0; 167 } 168 return test_bit(feat, cpu->model->features); 169 } 170 171 uint8_t s390_get_gen_for_cpu_type(uint16_t type) 172 { 173 int i; 174 175 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 176 if (s390_cpu_defs[i].type == type) { 177 return s390_cpu_defs[i].gen; 178 } 179 } 180 return 0; 181 } 182 183 const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga, 184 S390FeatBitmap features) 185 { 186 const S390CPUDef *last_compatible = NULL; 187 const S390CPUDef *matching_cpu_type = NULL; 188 int i; 189 190 if (!gen) { 191 ec_ga = 0; 192 } 193 if (!gen && type) { 194 gen = s390_get_gen_for_cpu_type(type); 195 } 196 197 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 198 const S390CPUDef *def = &s390_cpu_defs[i]; 199 S390FeatBitmap missing; 200 201 /* don't even try newer generations if we know the generation */ 202 if (gen) { 203 if (def->gen > gen) { 204 break; 205 } else if (def->gen == gen && ec_ga && def->ec_ga > ec_ga) { 206 break; 207 } 208 } 209 210 if (features) { 211 /* see if the model satisfies the minimum features */ 212 bitmap_andnot(missing, def->base_feat, features, S390_FEAT_MAX); 213 if (!bitmap_empty(missing, S390_FEAT_MAX)) { 214 break; 215 } 216 } 217 218 /* stop the search if we found the exact model */ 219 if (def->type == type && def->ec_ga == ec_ga) { 220 return def; 221 } 222 /* remember if we've at least seen one with the same cpu type */ 223 if (def->type == type) { 224 matching_cpu_type = def; 225 } 226 last_compatible = def; 227 } 228 /* prefer the model with the same cpu type, esp. don't take the BC for EC */ 229 if (matching_cpu_type) { 230 return matching_cpu_type; 231 } 232 return last_compatible; 233 } 234 235 struct S390PrintCpuListInfo { 236 FILE *f; 237 fprintf_function print; 238 }; 239 240 static void print_cpu_model_list(ObjectClass *klass, void *opaque) 241 { 242 struct S390PrintCpuListInfo *info = opaque; 243 S390CPUClass *scc = S390_CPU_CLASS(klass); 244 char *name = g_strdup(object_class_get_name(klass)); 245 const char *details = ""; 246 247 if (scc->is_static) { 248 details = "(static, migration-safe)"; 249 } else if (scc->is_migration_safe) { 250 details = "(migration-safe)"; 251 } 252 253 /* strip off the -s390-cpu */ 254 g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0; 255 (*info->print)(info->f, "s390 %-15s %-35s %s\n", name, scc->desc, 256 details); 257 g_free(name); 258 } 259 260 void s390_cpu_list(FILE *f, fprintf_function print) 261 { 262 struct S390PrintCpuListInfo info = { 263 .f = f, 264 .print = print, 265 }; 266 S390FeatGroup group; 267 S390Feat feat; 268 269 object_class_foreach(print_cpu_model_list, TYPE_S390_CPU, false, &info); 270 271 (*print)(f, "\nRecognized feature flags:\n"); 272 for (feat = 0; feat < S390_FEAT_MAX; feat++) { 273 const S390FeatDef *def = s390_feat_def(feat); 274 275 (*print)(f, "%-20s %-50s\n", def->name, def->desc); 276 } 277 278 (*print)(f, "\nRecognized feature groups:\n"); 279 for (group = 0; group < S390_FEAT_GROUP_MAX; group++) { 280 const S390FeatGroupDef *def = s390_feat_group_def(group); 281 282 (*print)(f, "%-20s %-50s\n", def->name, def->desc); 283 } 284 } 285 286 #ifndef CONFIG_USER_ONLY 287 static void create_cpu_model_list(ObjectClass *klass, void *opaque) 288 { 289 CpuDefinitionInfoList **cpu_list = opaque; 290 CpuDefinitionInfoList *entry; 291 CpuDefinitionInfo *info; 292 char *name = g_strdup(object_class_get_name(klass)); 293 S390CPUClass *scc = S390_CPU_CLASS(klass); 294 295 /* strip off the -s390-cpu */ 296 g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0; 297 info = g_malloc0(sizeof(*info)); 298 info->name = name; 299 info->has_migration_safe = true; 300 info->migration_safe = scc->is_migration_safe; 301 info->q_static = scc->is_static; 302 info->q_typename = g_strdup(object_class_get_name(klass)); 303 304 305 entry = g_malloc0(sizeof(*entry)); 306 entry->value = info; 307 entry->next = *cpu_list; 308 *cpu_list = entry; 309 } 310 311 CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp) 312 { 313 CpuDefinitionInfoList *list = NULL; 314 315 object_class_foreach(create_cpu_model_list, TYPE_S390_CPU, false, &list); 316 317 return list; 318 } 319 320 static void cpu_model_from_info(S390CPUModel *model, const CpuModelInfo *info, 321 Error **errp) 322 { 323 const QDict *qdict = NULL; 324 const QDictEntry *e; 325 Visitor *visitor; 326 ObjectClass *oc; 327 S390CPU *cpu; 328 Object *obj; 329 330 if (info->props) { 331 qdict = qobject_to_qdict(info->props); 332 if (!qdict) { 333 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict"); 334 return; 335 } 336 } 337 338 oc = cpu_class_by_name(TYPE_S390_CPU, info->name); 339 if (!oc) { 340 error_setg(errp, "The CPU definition \'%s\' is unknown.", info->name); 341 return; 342 } 343 if (S390_CPU_CLASS(oc)->kvm_required && !kvm_enabled()) { 344 error_setg(errp, "The CPU definition '%s' requires KVM", info->name); 345 return; 346 } 347 obj = object_new(object_class_get_name(oc)); 348 cpu = S390_CPU(obj); 349 350 if (!cpu->model) { 351 error_setg(errp, "Details about the host CPU model are not available, " 352 "it cannot be used."); 353 object_unref(obj); 354 return; 355 } 356 357 if (qdict) { 358 visitor = qobject_input_visitor_new(info->props); 359 visit_start_struct(visitor, NULL, NULL, 0, errp); 360 if (*errp) { 361 object_unref(obj); 362 return; 363 } 364 for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) { 365 object_property_set(obj, visitor, e->key, errp); 366 if (*errp) { 367 break; 368 } 369 } 370 if (!*errp) { 371 visit_check_struct(visitor, errp); 372 } 373 visit_end_struct(visitor, NULL); 374 visit_free(visitor); 375 if (*errp) { 376 object_unref(obj); 377 return; 378 } 379 } 380 381 /* copy the model and throw the cpu away */ 382 memcpy(model, cpu->model, sizeof(*model)); 383 object_unref(obj); 384 } 385 386 static void qdict_add_disabled_feat(const char *name, void *opaque) 387 { 388 qdict_put_bool(opaque, name, false); 389 } 390 391 static void qdict_add_enabled_feat(const char *name, void *opaque) 392 { 393 qdict_put_bool(opaque, name, true); 394 } 395 396 /* convert S390CPUDef into a static CpuModelInfo */ 397 static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model, 398 bool delta_changes) 399 { 400 QDict *qdict = qdict_new(); 401 S390FeatBitmap bitmap; 402 403 /* always fallback to the static base model */ 404 info->name = g_strdup_printf("%s-base", model->def->name); 405 406 if (delta_changes) { 407 /* features deleted from the base feature set */ 408 bitmap_andnot(bitmap, model->def->base_feat, model->features, 409 S390_FEAT_MAX); 410 if (!bitmap_empty(bitmap, S390_FEAT_MAX)) { 411 s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat); 412 } 413 414 /* features added to the base feature set */ 415 bitmap_andnot(bitmap, model->features, model->def->base_feat, 416 S390_FEAT_MAX); 417 if (!bitmap_empty(bitmap, S390_FEAT_MAX)) { 418 s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_enabled_feat); 419 } 420 } else { 421 /* expand all features */ 422 s390_feat_bitmap_to_ascii(model->features, qdict, 423 qdict_add_enabled_feat); 424 bitmap_complement(bitmap, model->features, S390_FEAT_MAX); 425 s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat); 426 } 427 428 if (!qdict_size(qdict)) { 429 QDECREF(qdict); 430 } else { 431 info->props = QOBJECT(qdict); 432 info->has_props = true; 433 } 434 } 435 436 CpuModelExpansionInfo *arch_query_cpu_model_expansion(CpuModelExpansionType type, 437 CpuModelInfo *model, 438 Error **errp) 439 { 440 CpuModelExpansionInfo *expansion_info = NULL; 441 S390CPUModel s390_model; 442 bool delta_changes = false; 443 444 /* convert it to our internal representation */ 445 cpu_model_from_info(&s390_model, model, errp); 446 if (*errp) { 447 return NULL; 448 } 449 450 if (type == CPU_MODEL_EXPANSION_TYPE_STATIC) { 451 delta_changes = true; 452 } else if (type != CPU_MODEL_EXPANSION_TYPE_FULL) { 453 error_setg(errp, "The requested expansion type is not supported."); 454 return NULL; 455 } 456 457 /* convert it back to a static representation */ 458 expansion_info = g_malloc0(sizeof(*expansion_info)); 459 expansion_info->model = g_malloc0(sizeof(*expansion_info->model)); 460 cpu_info_from_model(expansion_info->model, &s390_model, delta_changes); 461 return expansion_info; 462 } 463 464 static void list_add_feat(const char *name, void *opaque) 465 { 466 strList **last = (strList **) opaque; 467 strList *entry; 468 469 entry = g_malloc0(sizeof(*entry)); 470 entry->value = g_strdup(name); 471 entry->next = *last; 472 *last = entry; 473 } 474 475 CpuModelCompareInfo *arch_query_cpu_model_comparison(CpuModelInfo *infoa, 476 CpuModelInfo *infob, 477 Error **errp) 478 { 479 CpuModelCompareResult feat_result, gen_result; 480 CpuModelCompareInfo *compare_info; 481 S390FeatBitmap missing, added; 482 S390CPUModel modela, modelb; 483 484 /* convert both models to our internal representation */ 485 cpu_model_from_info(&modela, infoa, errp); 486 if (*errp) { 487 return NULL; 488 } 489 cpu_model_from_info(&modelb, infob, errp); 490 if (*errp) { 491 return NULL; 492 } 493 compare_info = g_malloc0(sizeof(*compare_info)); 494 495 /* check the cpu generation and ga level */ 496 if (modela.def->gen == modelb.def->gen) { 497 if (modela.def->ec_ga == modelb.def->ec_ga) { 498 /* ec and corresponding bc are identical */ 499 gen_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL; 500 } else if (modela.def->ec_ga < modelb.def->ec_ga) { 501 gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET; 502 } else { 503 gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET; 504 } 505 } else if (modela.def->gen < modelb.def->gen) { 506 gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET; 507 } else { 508 gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET; 509 } 510 if (gen_result != CPU_MODEL_COMPARE_RESULT_IDENTICAL) { 511 /* both models cannot be made identical */ 512 list_add_feat("type", &compare_info->responsible_properties); 513 } 514 515 /* check the feature set */ 516 if (bitmap_equal(modela.features, modelb.features, S390_FEAT_MAX)) { 517 feat_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL; 518 } else { 519 bitmap_andnot(missing, modela.features, modelb.features, S390_FEAT_MAX); 520 s390_feat_bitmap_to_ascii(missing, 521 &compare_info->responsible_properties, 522 list_add_feat); 523 bitmap_andnot(added, modelb.features, modela.features, S390_FEAT_MAX); 524 s390_feat_bitmap_to_ascii(added, &compare_info->responsible_properties, 525 list_add_feat); 526 if (bitmap_empty(missing, S390_FEAT_MAX)) { 527 feat_result = CPU_MODEL_COMPARE_RESULT_SUBSET; 528 } else if (bitmap_empty(added, S390_FEAT_MAX)) { 529 feat_result = CPU_MODEL_COMPARE_RESULT_SUPERSET; 530 } else { 531 feat_result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE; 532 } 533 } 534 535 /* combine the results */ 536 if (gen_result == feat_result) { 537 compare_info->result = gen_result; 538 } else if (feat_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) { 539 compare_info->result = gen_result; 540 } else if (gen_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) { 541 compare_info->result = feat_result; 542 } else { 543 compare_info->result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE; 544 } 545 return compare_info; 546 } 547 548 CpuModelBaselineInfo *arch_query_cpu_model_baseline(CpuModelInfo *infoa, 549 CpuModelInfo *infob, 550 Error **errp) 551 { 552 CpuModelBaselineInfo *baseline_info; 553 S390CPUModel modela, modelb, model; 554 uint16_t cpu_type; 555 uint8_t max_gen_ga; 556 uint8_t max_gen; 557 558 /* convert both models to our internal representation */ 559 cpu_model_from_info(&modela, infoa, errp); 560 if (*errp) { 561 return NULL; 562 } 563 564 cpu_model_from_info(&modelb, infob, errp); 565 if (*errp) { 566 return NULL; 567 } 568 569 /* features both models support */ 570 bitmap_and(model.features, modela.features, modelb.features, S390_FEAT_MAX); 571 572 /* detect the maximum model not regarding features */ 573 if (modela.def->gen == modelb.def->gen) { 574 if (modela.def->type == modelb.def->type) { 575 cpu_type = modela.def->type; 576 } else { 577 cpu_type = 0; 578 } 579 max_gen = modela.def->gen; 580 max_gen_ga = MIN(modela.def->ec_ga, modelb.def->ec_ga); 581 } else if (modela.def->gen > modelb.def->gen) { 582 cpu_type = modelb.def->type; 583 max_gen = modelb.def->gen; 584 max_gen_ga = modelb.def->ec_ga; 585 } else { 586 cpu_type = modela.def->type; 587 max_gen = modela.def->gen; 588 max_gen_ga = modela.def->ec_ga; 589 } 590 591 model.def = s390_find_cpu_def(cpu_type, max_gen, max_gen_ga, 592 model.features); 593 /* strip off features not part of the max model */ 594 bitmap_and(model.features, model.features, model.def->full_feat, 595 S390_FEAT_MAX); 596 597 baseline_info = g_malloc0(sizeof(*baseline_info)); 598 baseline_info->model = g_malloc0(sizeof(*baseline_info->model)); 599 cpu_info_from_model(baseline_info->model, &model, true); 600 return baseline_info; 601 } 602 #endif 603 604 static void check_consistency(const S390CPUModel *model) 605 { 606 static int dep[][2] = { 607 { S390_FEAT_IPTE_RANGE, S390_FEAT_DAT_ENH }, 608 { S390_FEAT_IDTE_SEGMENT, S390_FEAT_DAT_ENH }, 609 { S390_FEAT_IDTE_REGION, S390_FEAT_DAT_ENH }, 610 { S390_FEAT_IDTE_REGION, S390_FEAT_IDTE_SEGMENT }, 611 { S390_FEAT_LOCAL_TLB_CLEARING, S390_FEAT_DAT_ENH}, 612 { S390_FEAT_LONG_DISPLACEMENT_FAST, S390_FEAT_LONG_DISPLACEMENT }, 613 { S390_FEAT_DFP_FAST, S390_FEAT_DFP }, 614 { S390_FEAT_TRANSACTIONAL_EXE, S390_FEAT_STFLE_49 }, 615 { S390_FEAT_EDAT_2, S390_FEAT_EDAT}, 616 { S390_FEAT_MSA_EXT_5, S390_FEAT_KIMD_SHA_512 }, 617 { S390_FEAT_MSA_EXT_5, S390_FEAT_KLMD_SHA_512 }, 618 { S390_FEAT_MSA_EXT_4, S390_FEAT_MSA_EXT_3 }, 619 { S390_FEAT_SIE_CMMA, S390_FEAT_CMM }, 620 { S390_FEAT_SIE_CMMA, S390_FEAT_SIE_GSLS }, 621 { S390_FEAT_SIE_PFMFI, S390_FEAT_EDAT }, 622 }; 623 int i; 624 625 for (i = 0; i < ARRAY_SIZE(dep); i++) { 626 if (test_bit(dep[i][0], model->features) && 627 !test_bit(dep[i][1], model->features)) { 628 error_report("Warning: \'%s\' requires \'%s\'.", 629 s390_feat_def(dep[i][0])->name, 630 s390_feat_def(dep[i][1])->name); 631 } 632 } 633 } 634 635 static void error_prepend_missing_feat(const char *name, void *opaque) 636 { 637 error_prepend((Error **) opaque, "%s ", name); 638 } 639 640 static void check_compatibility(const S390CPUModel *max_model, 641 const S390CPUModel *model, Error **errp) 642 { 643 S390FeatBitmap missing; 644 645 if (model->def->gen > max_model->def->gen) { 646 error_setg(errp, "Selected CPU generation is too new. Maximum " 647 "supported model in the configuration: \'%s\'", 648 max_model->def->name); 649 return; 650 } else if (model->def->gen == max_model->def->gen && 651 model->def->ec_ga > max_model->def->ec_ga) { 652 error_setg(errp, "Selected CPU GA level is too new. Maximum " 653 "supported model in the configuration: \'%s\'", 654 max_model->def->name); 655 return; 656 } 657 658 /* detect the missing features to properly report them */ 659 bitmap_andnot(missing, model->features, max_model->features, S390_FEAT_MAX); 660 if (bitmap_empty(missing, S390_FEAT_MAX)) { 661 return; 662 } 663 664 error_setg(errp, " "); 665 s390_feat_bitmap_to_ascii(missing, errp, error_prepend_missing_feat); 666 error_prepend(errp, "Some features requested in the CPU model are not " 667 "available in the configuration: "); 668 } 669 670 /** 671 * The base TCG CPU model "qemu" is based on the z900. However, we already 672 * can also emulate some additional features of later CPU generations, so 673 * we add these additional feature bits here. 674 */ 675 static void add_qemu_cpu_model_features(S390FeatBitmap fbm) 676 { 677 static const int feats[] = { 678 S390_FEAT_DAT_ENH, 679 S390_FEAT_STFLE, 680 S390_FEAT_EXTENDED_IMMEDIATE, 681 S390_FEAT_EXTENDED_TRANSLATION_2, 682 S390_FEAT_LONG_DISPLACEMENT, 683 S390_FEAT_LONG_DISPLACEMENT_FAST, 684 S390_FEAT_ETF2_ENH, 685 S390_FEAT_STORE_CLOCK_FAST, 686 S390_FEAT_MOVE_WITH_OPTIONAL_SPEC, 687 S390_FEAT_GENERAL_INSTRUCTIONS_EXT, 688 S390_FEAT_EXECUTE_EXT, 689 S390_FEAT_FLOATING_POINT_SUPPPORT_ENH, 690 S390_FEAT_STFLE_45, 691 S390_FEAT_STFLE_49, 692 S390_FEAT_LOCAL_TLB_CLEARING, 693 S390_FEAT_STFLE_53, 694 }; 695 int i; 696 697 for (i = 0; i < ARRAY_SIZE(feats); i++) { 698 set_bit(feats[i], fbm); 699 } 700 } 701 702 static S390CPUModel *get_max_cpu_model(Error **errp) 703 { 704 static S390CPUModel max_model; 705 static bool cached; 706 707 if (cached) { 708 return &max_model; 709 } 710 711 if (kvm_enabled()) { 712 kvm_s390_get_host_cpu_model(&max_model, errp); 713 } else { 714 /* TCG emulates a z900 (with some optional additional features) */ 715 max_model.def = &s390_cpu_defs[0]; 716 bitmap_copy(max_model.features, max_model.def->default_feat, 717 S390_FEAT_MAX); 718 add_qemu_cpu_model_features(max_model.features); 719 } 720 if (!*errp) { 721 cached = true; 722 return &max_model; 723 } 724 return NULL; 725 } 726 727 static inline void apply_cpu_model(const S390CPUModel *model, Error **errp) 728 { 729 #ifndef CONFIG_USER_ONLY 730 static S390CPUModel applied_model; 731 static bool applied; 732 733 /* 734 * We have the same model for all VCPUs. KVM can only be configured before 735 * any VCPUs are defined in KVM. 736 */ 737 if (applied) { 738 if (model && memcmp(&applied_model, model, sizeof(S390CPUModel))) { 739 error_setg(errp, "Mixed CPU models are not supported on s390x."); 740 } 741 return; 742 } 743 744 if (kvm_enabled()) { 745 kvm_s390_apply_cpu_model(model, errp); 746 } 747 748 if (!*errp) { 749 applied = true; 750 if (model) { 751 applied_model = *model; 752 } 753 } 754 #endif 755 } 756 757 void s390_realize_cpu_model(CPUState *cs, Error **errp) 758 { 759 S390CPUClass *xcc = S390_CPU_GET_CLASS(cs); 760 S390CPU *cpu = S390_CPU(cs); 761 const S390CPUModel *max_model; 762 763 if (xcc->kvm_required && !kvm_enabled()) { 764 error_setg(errp, "CPU definition requires KVM"); 765 return; 766 } 767 768 if (!cpu->model) { 769 /* no host model support -> perform compatibility stuff */ 770 apply_cpu_model(NULL, errp); 771 return; 772 } 773 774 max_model = get_max_cpu_model(errp); 775 if (*errp) { 776 error_prepend(errp, "CPU models are not available: "); 777 return; 778 } 779 780 /* copy over properties that can vary */ 781 cpu->model->lowest_ibc = max_model->lowest_ibc; 782 cpu->model->cpu_id = max_model->cpu_id; 783 cpu->model->cpu_id_format = max_model->cpu_id_format; 784 cpu->model->cpu_ver = max_model->cpu_ver; 785 786 check_consistency(cpu->model); 787 check_compatibility(max_model, cpu->model, errp); 788 if (*errp) { 789 return; 790 } 791 792 apply_cpu_model(cpu->model, errp); 793 794 cpu->env.cpuid = s390_cpuid_from_cpu_model(cpu->model); 795 if (tcg_enabled()) { 796 /* basic mode, write the cpu address into the first 4 bit of the ID */ 797 cpu->env.cpuid = deposit64(cpu->env.cpuid, 54, 4, cpu->env.cpu_num); 798 } 799 } 800 801 static void get_feature(Object *obj, Visitor *v, const char *name, 802 void *opaque, Error **errp) 803 { 804 S390Feat feat = (S390Feat) opaque; 805 S390CPU *cpu = S390_CPU(obj); 806 bool value; 807 808 if (!cpu->model) { 809 error_setg(errp, "Details about the host CPU model are not available, " 810 "features cannot be queried."); 811 return; 812 } 813 814 value = test_bit(feat, cpu->model->features); 815 visit_type_bool(v, name, &value, errp); 816 } 817 818 static void set_feature(Object *obj, Visitor *v, const char *name, 819 void *opaque, Error **errp) 820 { 821 S390Feat feat = (S390Feat) opaque; 822 DeviceState *dev = DEVICE(obj); 823 S390CPU *cpu = S390_CPU(obj); 824 bool value; 825 826 if (dev->realized) { 827 error_setg(errp, "Attempt to set property '%s' on '%s' after " 828 "it was realized", name, object_get_typename(obj)); 829 return; 830 } else if (!cpu->model) { 831 error_setg(errp, "Details about the host CPU model are not available, " 832 "features cannot be changed."); 833 return; 834 } 835 836 visit_type_bool(v, name, &value, errp); 837 if (*errp) { 838 return; 839 } 840 if (value) { 841 if (!test_bit(feat, cpu->model->def->full_feat)) { 842 error_setg(errp, "Feature '%s' is not available for CPU model '%s'," 843 " it was introduced with later models.", 844 name, cpu->model->def->name); 845 return; 846 } 847 set_bit(feat, cpu->model->features); 848 } else { 849 clear_bit(feat, cpu->model->features); 850 } 851 } 852 853 static void get_feature_group(Object *obj, Visitor *v, const char *name, 854 void *opaque, Error **errp) 855 { 856 S390FeatGroup group = (S390FeatGroup) opaque; 857 const S390FeatGroupDef *def = s390_feat_group_def(group); 858 S390CPU *cpu = S390_CPU(obj); 859 S390FeatBitmap tmp; 860 bool value; 861 862 if (!cpu->model) { 863 error_setg(errp, "Details about the host CPU model are not available, " 864 "features cannot be queried."); 865 return; 866 } 867 868 /* a group is enabled if all features are enabled */ 869 bitmap_and(tmp, cpu->model->features, def->feat, S390_FEAT_MAX); 870 value = bitmap_equal(tmp, def->feat, S390_FEAT_MAX); 871 visit_type_bool(v, name, &value, errp); 872 } 873 874 static void set_feature_group(Object *obj, Visitor *v, const char *name, 875 void *opaque, Error **errp) 876 { 877 S390FeatGroup group = (S390FeatGroup) opaque; 878 const S390FeatGroupDef *def = s390_feat_group_def(group); 879 DeviceState *dev = DEVICE(obj); 880 S390CPU *cpu = S390_CPU(obj); 881 bool value; 882 883 if (dev->realized) { 884 error_setg(errp, "Attempt to set property '%s' on '%s' after " 885 "it was realized", name, object_get_typename(obj)); 886 return; 887 } else if (!cpu->model) { 888 error_setg(errp, "Details about the host CPU model are not available, " 889 "features cannot be changed."); 890 return; 891 } 892 893 visit_type_bool(v, name, &value, errp); 894 if (*errp) { 895 return; 896 } 897 if (value) { 898 /* groups are added in one shot, so an intersect is sufficient */ 899 if (!bitmap_intersects(def->feat, cpu->model->def->full_feat, 900 S390_FEAT_MAX)) { 901 error_setg(errp, "Group '%s' is not available for CPU model '%s'," 902 " it was introduced with later models.", 903 name, cpu->model->def->name); 904 return; 905 } 906 bitmap_or(cpu->model->features, cpu->model->features, def->feat, 907 S390_FEAT_MAX); 908 } else { 909 bitmap_andnot(cpu->model->features, cpu->model->features, def->feat, 910 S390_FEAT_MAX); 911 } 912 } 913 914 void s390_cpu_model_register_props(Object *obj) 915 { 916 S390FeatGroup group; 917 S390Feat feat; 918 919 for (feat = 0; feat < S390_FEAT_MAX; feat++) { 920 const S390FeatDef *def = s390_feat_def(feat); 921 object_property_add(obj, def->name, "bool", get_feature, 922 set_feature, NULL, (void *) feat, NULL); 923 object_property_set_description(obj, def->name, def->desc , NULL); 924 } 925 for (group = 0; group < S390_FEAT_GROUP_MAX; group++) { 926 const S390FeatGroupDef *def = s390_feat_group_def(group); 927 object_property_add(obj, def->name, "bool", get_feature_group, 928 set_feature_group, NULL, (void *) group, NULL); 929 object_property_set_description(obj, def->name, def->desc , NULL); 930 } 931 } 932 933 static void s390_cpu_model_initfn(Object *obj) 934 { 935 S390CPU *cpu = S390_CPU(obj); 936 S390CPUClass *xcc = S390_CPU_GET_CLASS(cpu); 937 938 cpu->model = g_malloc0(sizeof(*cpu->model)); 939 /* copy the model, so we can modify it */ 940 cpu->model->def = xcc->cpu_def; 941 if (xcc->is_static) { 942 /* base model - features will never change */ 943 bitmap_copy(cpu->model->features, cpu->model->def->base_feat, 944 S390_FEAT_MAX); 945 } else { 946 /* latest model - features can change */ 947 bitmap_copy(cpu->model->features, 948 cpu->model->def->default_feat, S390_FEAT_MAX); 949 } 950 } 951 952 #ifdef CONFIG_KVM 953 static void s390_host_cpu_model_initfn(Object *obj) 954 { 955 S390CPU *cpu = S390_CPU(obj); 956 Error *err = NULL; 957 958 if (!kvm_enabled() || !kvm_s390_cpu_models_supported()) { 959 return; 960 } 961 962 cpu->model = g_malloc0(sizeof(*cpu->model)); 963 kvm_s390_get_host_cpu_model(cpu->model, &err); 964 if (err) { 965 error_report_err(err); 966 g_free(cpu->model); 967 /* fallback to unsupported cpu models */ 968 cpu->model = NULL; 969 } 970 } 971 #endif 972 973 static void s390_qemu_cpu_model_initfn(Object *obj) 974 { 975 static S390CPUDef s390_qemu_cpu_defs; 976 S390CPU *cpu = S390_CPU(obj); 977 978 cpu->model = g_malloc0(sizeof(*cpu->model)); 979 /* TCG emulates a z900 (with some optional additional features) */ 980 memcpy(&s390_qemu_cpu_defs, &s390_cpu_defs[0], sizeof(s390_qemu_cpu_defs)); 981 add_qemu_cpu_model_features(s390_qemu_cpu_defs.full_feat); 982 cpu->model->def = &s390_qemu_cpu_defs; 983 bitmap_copy(cpu->model->features, cpu->model->def->default_feat, 984 S390_FEAT_MAX); 985 } 986 987 static void s390_cpu_model_finalize(Object *obj) 988 { 989 S390CPU *cpu = S390_CPU(obj); 990 991 g_free(cpu->model); 992 cpu->model = NULL; 993 } 994 995 static bool get_is_migration_safe(Object *obj, Error **errp) 996 { 997 return S390_CPU_GET_CLASS(obj)->is_migration_safe; 998 } 999 1000 static bool get_is_static(Object *obj, Error **errp) 1001 { 1002 return S390_CPU_GET_CLASS(obj)->is_static; 1003 } 1004 1005 static char *get_description(Object *obj, Error **errp) 1006 { 1007 return g_strdup(S390_CPU_GET_CLASS(obj)->desc); 1008 } 1009 1010 void s390_cpu_model_class_register_props(ObjectClass *oc) 1011 { 1012 object_class_property_add_bool(oc, "migration-safe", get_is_migration_safe, 1013 NULL, NULL); 1014 object_class_property_add_bool(oc, "static", get_is_static, 1015 NULL, NULL); 1016 object_class_property_add_str(oc, "description", get_description, NULL, 1017 NULL); 1018 } 1019 1020 #ifdef CONFIG_KVM 1021 static void s390_host_cpu_model_class_init(ObjectClass *oc, void *data) 1022 { 1023 S390CPUClass *xcc = S390_CPU_CLASS(oc); 1024 1025 xcc->kvm_required = true; 1026 xcc->desc = "KVM only: All recognized features"; 1027 } 1028 #endif 1029 1030 static void s390_base_cpu_model_class_init(ObjectClass *oc, void *data) 1031 { 1032 S390CPUClass *xcc = S390_CPU_CLASS(oc); 1033 1034 /* all base models are migration safe */ 1035 xcc->cpu_def = (const S390CPUDef *) data; 1036 xcc->is_migration_safe = true; 1037 xcc->is_static = true; 1038 xcc->desc = xcc->cpu_def->desc; 1039 } 1040 1041 static void s390_cpu_model_class_init(ObjectClass *oc, void *data) 1042 { 1043 S390CPUClass *xcc = S390_CPU_CLASS(oc); 1044 1045 /* model that can change between QEMU versions */ 1046 xcc->cpu_def = (const S390CPUDef *) data; 1047 xcc->is_migration_safe = true; 1048 xcc->desc = xcc->cpu_def->desc; 1049 } 1050 1051 static void s390_qemu_cpu_model_class_init(ObjectClass *oc, void *data) 1052 { 1053 S390CPUClass *xcc = S390_CPU_CLASS(oc); 1054 1055 xcc->is_migration_safe = true; 1056 xcc->desc = g_strdup_printf("QEMU Virtual CPU version %s", 1057 qemu_hw_version()); 1058 } 1059 1060 #define S390_CPU_TYPE_SUFFIX "-" TYPE_S390_CPU 1061 #define S390_CPU_TYPE_NAME(name) (name S390_CPU_TYPE_SUFFIX) 1062 1063 /* Generate type name for a cpu model. Caller has to free the string. */ 1064 static char *s390_cpu_type_name(const char *model_name) 1065 { 1066 return g_strdup_printf(S390_CPU_TYPE_NAME("%s"), model_name); 1067 } 1068 1069 /* Generate type name for a base cpu model. Caller has to free the string. */ 1070 static char *s390_base_cpu_type_name(const char *model_name) 1071 { 1072 return g_strdup_printf(S390_CPU_TYPE_NAME("%s-base"), model_name); 1073 } 1074 1075 ObjectClass *s390_cpu_class_by_name(const char *name) 1076 { 1077 char *typename = s390_cpu_type_name(name); 1078 ObjectClass *oc; 1079 1080 oc = object_class_by_name(typename); 1081 g_free(typename); 1082 return oc; 1083 } 1084 1085 static const TypeInfo qemu_s390_cpu_type_info = { 1086 .name = S390_CPU_TYPE_NAME("qemu"), 1087 .parent = TYPE_S390_CPU, 1088 .instance_init = s390_qemu_cpu_model_initfn, 1089 .instance_finalize = s390_cpu_model_finalize, 1090 .class_init = s390_qemu_cpu_model_class_init, 1091 }; 1092 1093 #ifdef CONFIG_KVM 1094 static const TypeInfo host_s390_cpu_type_info = { 1095 .name = S390_CPU_TYPE_NAME("host"), 1096 .parent = TYPE_S390_CPU, 1097 .instance_init = s390_host_cpu_model_initfn, 1098 .instance_finalize = s390_cpu_model_finalize, 1099 .class_init = s390_host_cpu_model_class_init, 1100 }; 1101 #endif 1102 1103 static void register_types(void) 1104 { 1105 int i; 1106 1107 /* init all bitmaps from gnerated data initially */ 1108 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 1109 s390_init_feat_bitmap(s390_cpu_defs[i].base_init, 1110 s390_cpu_defs[i].base_feat); 1111 s390_init_feat_bitmap(s390_cpu_defs[i].default_init, 1112 s390_cpu_defs[i].default_feat); 1113 s390_init_feat_bitmap(s390_cpu_defs[i].full_init, 1114 s390_cpu_defs[i].full_feat); 1115 } 1116 1117 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 1118 char *base_name = s390_base_cpu_type_name(s390_cpu_defs[i].name); 1119 TypeInfo ti_base = { 1120 .name = base_name, 1121 .parent = TYPE_S390_CPU, 1122 .instance_init = s390_cpu_model_initfn, 1123 .instance_finalize = s390_cpu_model_finalize, 1124 .class_init = s390_base_cpu_model_class_init, 1125 .class_data = (void *) &s390_cpu_defs[i], 1126 }; 1127 char *name = s390_cpu_type_name(s390_cpu_defs[i].name); 1128 TypeInfo ti = { 1129 .name = name, 1130 .parent = TYPE_S390_CPU, 1131 .instance_init = s390_cpu_model_initfn, 1132 .instance_finalize = s390_cpu_model_finalize, 1133 .class_init = s390_cpu_model_class_init, 1134 .class_data = (void *) &s390_cpu_defs[i], 1135 }; 1136 1137 type_register_static(&ti_base); 1138 type_register_static(&ti); 1139 g_free(base_name); 1140 g_free(name); 1141 } 1142 1143 type_register_static(&qemu_s390_cpu_type_info); 1144 #ifdef CONFIG_KVM 1145 type_register_static(&host_s390_cpu_type_info); 1146 #endif 1147 } 1148 1149 type_init(register_types) 1150