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 int i; 188 189 if (!gen) { 190 ec_ga = 0; 191 } 192 if (!gen && type) { 193 gen = s390_get_gen_for_cpu_type(type); 194 } 195 196 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 197 const S390CPUDef *def = &s390_cpu_defs[i]; 198 S390FeatBitmap missing; 199 200 /* don't even try newer generations if we know the generation */ 201 if (gen) { 202 if (def->gen > gen) { 203 break; 204 } else if (def->gen == gen && ec_ga && def->ec_ga > ec_ga) { 205 break; 206 } 207 } 208 209 if (features) { 210 /* see if the model satisfies the minimum features */ 211 bitmap_andnot(missing, def->base_feat, features, S390_FEAT_MAX); 212 if (!bitmap_empty(missing, S390_FEAT_MAX)) { 213 break; 214 } 215 } 216 217 /* stop the search if we found the exact model */ 218 if (def->type == type && def->ec_ga == ec_ga) { 219 return def; 220 } 221 last_compatible = def; 222 } 223 return last_compatible; 224 } 225 226 struct S390PrintCpuListInfo { 227 FILE *f; 228 fprintf_function print; 229 }; 230 231 static void print_cpu_model_list(ObjectClass *klass, void *opaque) 232 { 233 struct S390PrintCpuListInfo *info = opaque; 234 S390CPUClass *scc = S390_CPU_CLASS(klass); 235 char *name = g_strdup(object_class_get_name(klass)); 236 const char *details = ""; 237 238 if (scc->is_static) { 239 details = "(static, migration-safe)"; 240 } else if (scc->is_migration_safe) { 241 details = "(migration-safe)"; 242 } 243 244 /* strip off the -s390-cpu */ 245 g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0; 246 (*info->print)(info->f, "s390 %-15s %-35s %s\n", name, scc->desc, 247 details); 248 g_free(name); 249 } 250 251 void s390_cpu_list(FILE *f, fprintf_function print) 252 { 253 struct S390PrintCpuListInfo info = { 254 .f = f, 255 .print = print, 256 }; 257 S390FeatGroup group; 258 S390Feat feat; 259 260 object_class_foreach(print_cpu_model_list, TYPE_S390_CPU, false, &info); 261 262 (*print)(f, "\nRecognized feature flags:\n"); 263 for (feat = 0; feat < S390_FEAT_MAX; feat++) { 264 const S390FeatDef *def = s390_feat_def(feat); 265 266 (*print)(f, "%-20s %-50s\n", def->name, def->desc); 267 } 268 269 (*print)(f, "\nRecognized feature groups:\n"); 270 for (group = 0; group < S390_FEAT_GROUP_MAX; group++) { 271 const S390FeatGroupDef *def = s390_feat_group_def(group); 272 273 (*print)(f, "%-20s %-50s\n", def->name, def->desc); 274 } 275 } 276 277 #ifndef CONFIG_USER_ONLY 278 static void create_cpu_model_list(ObjectClass *klass, void *opaque) 279 { 280 CpuDefinitionInfoList **cpu_list = opaque; 281 CpuDefinitionInfoList *entry; 282 CpuDefinitionInfo *info; 283 char *name = g_strdup(object_class_get_name(klass)); 284 S390CPUClass *scc = S390_CPU_CLASS(klass); 285 286 /* strip off the -s390-cpu */ 287 g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0; 288 info = g_malloc0(sizeof(*info)); 289 info->name = name; 290 info->has_migration_safe = true; 291 info->migration_safe = scc->is_migration_safe; 292 info->q_static = scc->is_static; 293 info->q_typename = g_strdup(object_class_get_name(klass)); 294 295 296 entry = g_malloc0(sizeof(*entry)); 297 entry->value = info; 298 entry->next = *cpu_list; 299 *cpu_list = entry; 300 } 301 302 CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp) 303 { 304 CpuDefinitionInfoList *list = NULL; 305 306 object_class_foreach(create_cpu_model_list, TYPE_S390_CPU, false, &list); 307 308 return list; 309 } 310 311 static void cpu_model_from_info(S390CPUModel *model, const CpuModelInfo *info, 312 Error **errp) 313 { 314 const QDict *qdict = NULL; 315 const QDictEntry *e; 316 Visitor *visitor; 317 ObjectClass *oc; 318 S390CPU *cpu; 319 Object *obj; 320 321 if (info->props) { 322 qdict = qobject_to_qdict(info->props); 323 if (!qdict) { 324 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict"); 325 return; 326 } 327 } 328 329 oc = cpu_class_by_name(TYPE_S390_CPU, info->name); 330 if (!oc) { 331 error_setg(errp, "The CPU definition \'%s\' is unknown.", info->name); 332 return; 333 } 334 if (S390_CPU_CLASS(oc)->kvm_required && !kvm_enabled()) { 335 error_setg(errp, "The CPU definition '%s' requires KVM", info->name); 336 return; 337 } 338 obj = object_new(object_class_get_name(oc)); 339 cpu = S390_CPU(obj); 340 341 if (!cpu->model) { 342 error_setg(errp, "Details about the host CPU model are not available, " 343 "it cannot be used."); 344 object_unref(obj); 345 return; 346 } 347 348 if (qdict) { 349 visitor = qobject_input_visitor_new(info->props, true); 350 visit_start_struct(visitor, NULL, NULL, 0, errp); 351 if (*errp) { 352 object_unref(obj); 353 return; 354 } 355 for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) { 356 object_property_set(obj, visitor, e->key, errp); 357 if (*errp) { 358 break; 359 } 360 } 361 if (!*errp) { 362 visit_check_struct(visitor, errp); 363 } 364 visit_end_struct(visitor, NULL); 365 visit_free(visitor); 366 if (*errp) { 367 object_unref(obj); 368 return; 369 } 370 } 371 372 /* copy the model and throw the cpu away */ 373 memcpy(model, cpu->model, sizeof(*model)); 374 object_unref(obj); 375 } 376 377 static void qdict_add_disabled_feat(const char *name, void *opaque) 378 { 379 qdict_put((QDict *) opaque, name, qbool_from_bool(false)); 380 } 381 382 static void qdict_add_enabled_feat(const char *name, void *opaque) 383 { 384 qdict_put((QDict *) opaque, name, qbool_from_bool(true)); 385 } 386 387 /* convert S390CPUDef into a static CpuModelInfo */ 388 static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model, 389 bool delta_changes) 390 { 391 QDict *qdict = qdict_new(); 392 S390FeatBitmap bitmap; 393 394 /* always fallback to the static base model */ 395 info->name = g_strdup_printf("%s-base", model->def->name); 396 397 if (delta_changes) { 398 /* features deleted from the base feature set */ 399 bitmap_andnot(bitmap, model->def->base_feat, model->features, 400 S390_FEAT_MAX); 401 if (!bitmap_empty(bitmap, S390_FEAT_MAX)) { 402 s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat); 403 } 404 405 /* features added to the base feature set */ 406 bitmap_andnot(bitmap, model->features, model->def->base_feat, 407 S390_FEAT_MAX); 408 if (!bitmap_empty(bitmap, S390_FEAT_MAX)) { 409 s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_enabled_feat); 410 } 411 } else { 412 /* expand all features */ 413 s390_feat_bitmap_to_ascii(model->features, qdict, 414 qdict_add_enabled_feat); 415 bitmap_complement(bitmap, model->features, S390_FEAT_MAX); 416 s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat); 417 } 418 419 if (!qdict_size(qdict)) { 420 QDECREF(qdict); 421 } else { 422 info->props = QOBJECT(qdict); 423 info->has_props = true; 424 } 425 } 426 427 CpuModelExpansionInfo *arch_query_cpu_model_expansion(CpuModelExpansionType type, 428 CpuModelInfo *model, 429 Error **errp) 430 { 431 CpuModelExpansionInfo *expansion_info = NULL; 432 S390CPUModel s390_model; 433 bool delta_changes = false; 434 435 /* convert it to our internal representation */ 436 cpu_model_from_info(&s390_model, model, errp); 437 if (*errp) { 438 return NULL; 439 } 440 441 if (type == CPU_MODEL_EXPANSION_TYPE_STATIC) { 442 delta_changes = true; 443 } else if (type != CPU_MODEL_EXPANSION_TYPE_FULL) { 444 error_setg(errp, "The requested expansion type is not supported."); 445 return NULL; 446 } 447 448 /* convert it back to a static representation */ 449 expansion_info = g_malloc0(sizeof(*expansion_info)); 450 expansion_info->model = g_malloc0(sizeof(*expansion_info->model)); 451 cpu_info_from_model(expansion_info->model, &s390_model, delta_changes); 452 return expansion_info; 453 } 454 455 static void list_add_feat(const char *name, void *opaque) 456 { 457 strList **last = (strList **) opaque; 458 strList *entry; 459 460 entry = g_malloc0(sizeof(*entry)); 461 entry->value = g_strdup(name); 462 entry->next = *last; 463 *last = entry; 464 } 465 466 CpuModelCompareInfo *arch_query_cpu_model_comparison(CpuModelInfo *infoa, 467 CpuModelInfo *infob, 468 Error **errp) 469 { 470 CpuModelCompareResult feat_result, gen_result; 471 CpuModelCompareInfo *compare_info; 472 S390FeatBitmap missing, added; 473 S390CPUModel modela, modelb; 474 475 /* convert both models to our internal representation */ 476 cpu_model_from_info(&modela, infoa, errp); 477 if (*errp) { 478 return NULL; 479 } 480 cpu_model_from_info(&modelb, infob, errp); 481 if (*errp) { 482 return NULL; 483 } 484 compare_info = g_malloc0(sizeof(*compare_info)); 485 486 /* check the cpu generation and ga level */ 487 if (modela.def->gen == modelb.def->gen) { 488 if (modela.def->ec_ga == modelb.def->ec_ga) { 489 /* ec and corresponding bc are identical */ 490 gen_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL; 491 } else if (modela.def->ec_ga < modelb.def->ec_ga) { 492 gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET; 493 } else { 494 gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET; 495 } 496 } else if (modela.def->gen < modelb.def->gen) { 497 gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET; 498 } else { 499 gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET; 500 } 501 if (gen_result != CPU_MODEL_COMPARE_RESULT_IDENTICAL) { 502 /* both models cannot be made identical */ 503 list_add_feat("type", &compare_info->responsible_properties); 504 } 505 506 /* check the feature set */ 507 if (bitmap_equal(modela.features, modelb.features, S390_FEAT_MAX)) { 508 feat_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL; 509 } else { 510 bitmap_andnot(missing, modela.features, modelb.features, S390_FEAT_MAX); 511 s390_feat_bitmap_to_ascii(missing, 512 &compare_info->responsible_properties, 513 list_add_feat); 514 bitmap_andnot(added, modelb.features, modela.features, S390_FEAT_MAX); 515 s390_feat_bitmap_to_ascii(added, &compare_info->responsible_properties, 516 list_add_feat); 517 if (bitmap_empty(missing, S390_FEAT_MAX)) { 518 feat_result = CPU_MODEL_COMPARE_RESULT_SUBSET; 519 } else if (bitmap_empty(added, S390_FEAT_MAX)) { 520 feat_result = CPU_MODEL_COMPARE_RESULT_SUPERSET; 521 } else { 522 feat_result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE; 523 } 524 } 525 526 /* combine the results */ 527 if (gen_result == feat_result) { 528 compare_info->result = gen_result; 529 } else if (feat_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) { 530 compare_info->result = gen_result; 531 } else if (gen_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) { 532 compare_info->result = feat_result; 533 } else { 534 compare_info->result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE; 535 } 536 return compare_info; 537 } 538 539 CpuModelBaselineInfo *arch_query_cpu_model_baseline(CpuModelInfo *infoa, 540 CpuModelInfo *infob, 541 Error **errp) 542 { 543 CpuModelBaselineInfo *baseline_info; 544 S390CPUModel modela, modelb, model; 545 uint16_t cpu_type; 546 uint8_t max_gen_ga; 547 uint8_t max_gen; 548 549 /* convert both models to our internal representation */ 550 cpu_model_from_info(&modela, infoa, errp); 551 if (*errp) { 552 return NULL; 553 } 554 555 cpu_model_from_info(&modelb, infob, errp); 556 if (*errp) { 557 return NULL; 558 } 559 560 /* features both models support */ 561 bitmap_and(model.features, modela.features, modelb.features, S390_FEAT_MAX); 562 563 /* detect the maximum model not regarding features */ 564 if (modela.def->gen == modelb.def->gen) { 565 if (modela.def->type == modelb.def->type) { 566 cpu_type = modela.def->type; 567 } else { 568 cpu_type = 0; 569 } 570 max_gen = modela.def->gen; 571 max_gen_ga = MIN(modela.def->ec_ga, modelb.def->ec_ga); 572 } else if (modela.def->gen > modelb.def->gen) { 573 cpu_type = modelb.def->type; 574 max_gen = modelb.def->gen; 575 max_gen_ga = modelb.def->ec_ga; 576 } else { 577 cpu_type = modela.def->type; 578 max_gen = modela.def->gen; 579 max_gen_ga = modela.def->ec_ga; 580 } 581 582 model.def = s390_find_cpu_def(cpu_type, max_gen, max_gen_ga, 583 model.features); 584 /* strip off features not part of the max model */ 585 bitmap_and(model.features, model.features, model.def->full_feat, 586 S390_FEAT_MAX); 587 588 baseline_info = g_malloc0(sizeof(*baseline_info)); 589 baseline_info->model = g_malloc0(sizeof(*baseline_info->model)); 590 cpu_info_from_model(baseline_info->model, &model, true); 591 return baseline_info; 592 } 593 #endif 594 595 static void check_consistency(const S390CPUModel *model) 596 { 597 static int dep[][2] = { 598 { S390_FEAT_IPTE_RANGE, S390_FEAT_DAT_ENH }, 599 { S390_FEAT_IDTE_SEGMENT, S390_FEAT_DAT_ENH }, 600 { S390_FEAT_IDTE_REGION, S390_FEAT_DAT_ENH }, 601 { S390_FEAT_IDTE_REGION, S390_FEAT_IDTE_SEGMENT }, 602 { S390_FEAT_LOCAL_TLB_CLEARING, S390_FEAT_DAT_ENH}, 603 { S390_FEAT_LONG_DISPLACEMENT_FAST, S390_FEAT_LONG_DISPLACEMENT }, 604 { S390_FEAT_DFP_FAST, S390_FEAT_DFP }, 605 { S390_FEAT_TRANSACTIONAL_EXE, S390_FEAT_STFLE_49 }, 606 { S390_FEAT_EDAT_2, S390_FEAT_EDAT}, 607 { S390_FEAT_MSA_EXT_5, S390_FEAT_KIMD_SHA_512 }, 608 { S390_FEAT_MSA_EXT_5, S390_FEAT_KLMD_SHA_512 }, 609 { S390_FEAT_MSA_EXT_4, S390_FEAT_MSA_EXT_3 }, 610 { S390_FEAT_SIE_CMMA, S390_FEAT_CMM }, 611 { S390_FEAT_SIE_CMMA, S390_FEAT_SIE_GSLS }, 612 { S390_FEAT_SIE_PFMFI, S390_FEAT_EDAT }, 613 }; 614 int i; 615 616 for (i = 0; i < ARRAY_SIZE(dep); i++) { 617 if (test_bit(dep[i][0], model->features) && 618 !test_bit(dep[i][1], model->features)) { 619 error_report("Warning: \'%s\' requires \'%s\'.", 620 s390_feat_def(dep[i][0])->name, 621 s390_feat_def(dep[i][1])->name); 622 } 623 } 624 } 625 626 static void error_prepend_missing_feat(const char *name, void *opaque) 627 { 628 error_prepend((Error **) opaque, "%s ", name); 629 } 630 631 static void check_compatibility(const S390CPUModel *max_model, 632 const S390CPUModel *model, Error **errp) 633 { 634 S390FeatBitmap missing; 635 636 if (model->def->gen > max_model->def->gen) { 637 error_setg(errp, "Selected CPU generation is too new. Maximum " 638 "supported model in the configuration: \'%s\'", 639 max_model->def->name); 640 return; 641 } else if (model->def->gen == max_model->def->gen && 642 model->def->ec_ga > max_model->def->ec_ga) { 643 error_setg(errp, "Selected CPU GA level is too new. Maximum " 644 "supported model in the configuration: \'%s\'", 645 max_model->def->name); 646 return; 647 } 648 649 /* detect the missing features to properly report them */ 650 bitmap_andnot(missing, model->features, max_model->features, S390_FEAT_MAX); 651 if (bitmap_empty(missing, S390_FEAT_MAX)) { 652 return; 653 } 654 655 error_setg(errp, " "); 656 s390_feat_bitmap_to_ascii(missing, errp, error_prepend_missing_feat); 657 error_prepend(errp, "Some features requested in the CPU model are not " 658 "available in the configuration: "); 659 } 660 661 static S390CPUModel *get_max_cpu_model(Error **errp) 662 { 663 #ifndef CONFIG_USER_ONLY 664 static S390CPUModel max_model; 665 static bool cached; 666 667 if (cached) { 668 return &max_model; 669 } 670 671 if (kvm_enabled()) { 672 kvm_s390_get_host_cpu_model(&max_model, errp); 673 } else { 674 /* TCG enulates a z900 */ 675 max_model.def = &s390_cpu_defs[0]; 676 bitmap_copy(max_model.features, max_model.def->default_feat, 677 S390_FEAT_MAX); 678 } 679 if (!*errp) { 680 cached = true; 681 return &max_model; 682 } 683 #endif 684 return NULL; 685 } 686 687 static inline void apply_cpu_model(const S390CPUModel *model, Error **errp) 688 { 689 #ifndef CONFIG_USER_ONLY 690 static S390CPUModel applied_model; 691 static bool applied; 692 693 /* 694 * We have the same model for all VCPUs. KVM can only be configured before 695 * any VCPUs are defined in KVM. 696 */ 697 if (applied) { 698 if (model && memcmp(&applied_model, model, sizeof(S390CPUModel))) { 699 error_setg(errp, "Mixed CPU models are not supported on s390x."); 700 } 701 return; 702 } 703 704 if (kvm_enabled()) { 705 kvm_s390_apply_cpu_model(model, errp); 706 } else if (model) { 707 /* FIXME TCG - use data for stdip/stfl */ 708 } 709 710 if (!*errp) { 711 applied = true; 712 if (model) { 713 applied_model = *model; 714 } 715 } 716 #endif 717 } 718 719 void s390_realize_cpu_model(CPUState *cs, Error **errp) 720 { 721 S390CPUClass *xcc = S390_CPU_GET_CLASS(cs); 722 S390CPU *cpu = S390_CPU(cs); 723 const S390CPUModel *max_model; 724 725 if (xcc->kvm_required && !kvm_enabled()) { 726 error_setg(errp, "CPU definition requires KVM"); 727 return; 728 } 729 730 if (!cpu->model) { 731 /* no host model support -> perform compatibility stuff */ 732 apply_cpu_model(NULL, errp); 733 return; 734 } 735 736 max_model = get_max_cpu_model(errp); 737 if (*errp) { 738 error_prepend(errp, "CPU models are not available: "); 739 return; 740 } 741 742 /* copy over properties that can vary */ 743 cpu->model->lowest_ibc = max_model->lowest_ibc; 744 cpu->model->cpu_id = max_model->cpu_id; 745 cpu->model->cpu_ver = max_model->cpu_ver; 746 747 check_consistency(cpu->model); 748 check_compatibility(max_model, cpu->model, errp); 749 if (*errp) { 750 return; 751 } 752 753 apply_cpu_model(cpu->model, errp); 754 } 755 756 static void get_feature(Object *obj, Visitor *v, const char *name, 757 void *opaque, Error **errp) 758 { 759 S390Feat feat = (S390Feat) opaque; 760 S390CPU *cpu = S390_CPU(obj); 761 bool value; 762 763 if (!cpu->model) { 764 error_setg(errp, "Details about the host CPU model are not available, " 765 "features cannot be queried."); 766 return; 767 } 768 769 value = test_bit(feat, cpu->model->features); 770 visit_type_bool(v, name, &value, errp); 771 } 772 773 static void set_feature(Object *obj, Visitor *v, const char *name, 774 void *opaque, Error **errp) 775 { 776 S390Feat feat = (S390Feat) opaque; 777 DeviceState *dev = DEVICE(obj); 778 S390CPU *cpu = S390_CPU(obj); 779 bool value; 780 781 if (dev->realized) { 782 error_setg(errp, "Attempt to set property '%s' on '%s' after " 783 "it was realized", name, object_get_typename(obj)); 784 return; 785 } else if (!cpu->model) { 786 error_setg(errp, "Details about the host CPU model are not available, " 787 "features cannot be changed."); 788 return; 789 } 790 791 visit_type_bool(v, name, &value, errp); 792 if (*errp) { 793 return; 794 } 795 if (value) { 796 if (!test_bit(feat, cpu->model->def->full_feat)) { 797 error_setg(errp, "Feature '%s' is not available for CPU model '%s'," 798 " it was introduced with later models.", 799 name, cpu->model->def->name); 800 return; 801 } 802 set_bit(feat, cpu->model->features); 803 } else { 804 clear_bit(feat, cpu->model->features); 805 } 806 } 807 808 static void get_feature_group(Object *obj, Visitor *v, const char *name, 809 void *opaque, Error **errp) 810 { 811 S390FeatGroup group = (S390FeatGroup) opaque; 812 const S390FeatGroupDef *def = s390_feat_group_def(group); 813 S390CPU *cpu = S390_CPU(obj); 814 S390FeatBitmap tmp; 815 bool value; 816 817 if (!cpu->model) { 818 error_setg(errp, "Details about the host CPU model are not available, " 819 "features cannot be queried."); 820 return; 821 } 822 823 /* a group is enabled if all features are enabled */ 824 bitmap_and(tmp, cpu->model->features, def->feat, S390_FEAT_MAX); 825 value = bitmap_equal(tmp, def->feat, S390_FEAT_MAX); 826 visit_type_bool(v, name, &value, errp); 827 } 828 829 static void set_feature_group(Object *obj, Visitor *v, const char *name, 830 void *opaque, Error **errp) 831 { 832 S390FeatGroup group = (S390FeatGroup) opaque; 833 const S390FeatGroupDef *def = s390_feat_group_def(group); 834 DeviceState *dev = DEVICE(obj); 835 S390CPU *cpu = S390_CPU(obj); 836 bool value; 837 838 if (dev->realized) { 839 error_setg(errp, "Attempt to set property '%s' on '%s' after " 840 "it was realized", name, object_get_typename(obj)); 841 return; 842 } else if (!cpu->model) { 843 error_setg(errp, "Details about the host CPU model are not available, " 844 "features cannot be changed."); 845 return; 846 } 847 848 visit_type_bool(v, name, &value, errp); 849 if (*errp) { 850 return; 851 } 852 if (value) { 853 /* groups are added in one shot, so an intersect is sufficient */ 854 if (!bitmap_intersects(def->feat, cpu->model->def->full_feat, 855 S390_FEAT_MAX)) { 856 error_setg(errp, "Group '%s' is not available for CPU model '%s'," 857 " it was introduced with later models.", 858 name, cpu->model->def->name); 859 return; 860 } 861 bitmap_or(cpu->model->features, cpu->model->features, def->feat, 862 S390_FEAT_MAX); 863 } else { 864 bitmap_andnot(cpu->model->features, cpu->model->features, def->feat, 865 S390_FEAT_MAX); 866 } 867 } 868 869 void s390_cpu_model_register_props(Object *obj) 870 { 871 S390FeatGroup group; 872 S390Feat feat; 873 874 for (feat = 0; feat < S390_FEAT_MAX; feat++) { 875 const S390FeatDef *def = s390_feat_def(feat); 876 object_property_add(obj, def->name, "bool", get_feature, 877 set_feature, NULL, (void *) feat, NULL); 878 object_property_set_description(obj, def->name, def->desc , NULL); 879 } 880 for (group = 0; group < S390_FEAT_GROUP_MAX; group++) { 881 const S390FeatGroupDef *def = s390_feat_group_def(group); 882 object_property_add(obj, def->name, "bool", get_feature_group, 883 set_feature_group, NULL, (void *) group, NULL); 884 object_property_set_description(obj, def->name, def->desc , NULL); 885 } 886 } 887 888 static void s390_cpu_model_initfn(Object *obj) 889 { 890 S390CPU *cpu = S390_CPU(obj); 891 S390CPUClass *xcc = S390_CPU_GET_CLASS(cpu); 892 893 cpu->model = g_malloc0(sizeof(*cpu->model)); 894 /* copy the model, so we can modify it */ 895 cpu->model->def = xcc->cpu_def; 896 if (xcc->is_static) { 897 /* base model - features will never change */ 898 bitmap_copy(cpu->model->features, cpu->model->def->base_feat, 899 S390_FEAT_MAX); 900 } else { 901 /* latest model - features can change */ 902 bitmap_copy(cpu->model->features, 903 cpu->model->def->default_feat, S390_FEAT_MAX); 904 } 905 } 906 907 #ifdef CONFIG_KVM 908 static void s390_host_cpu_model_initfn(Object *obj) 909 { 910 S390CPU *cpu = S390_CPU(obj); 911 Error *err = NULL; 912 913 if (!kvm_enabled() || !kvm_s390_cpu_models_supported()) { 914 return; 915 } 916 917 cpu->model = g_malloc0(sizeof(*cpu->model)); 918 kvm_s390_get_host_cpu_model(cpu->model, &err); 919 if (err) { 920 error_report_err(err); 921 g_free(cpu->model); 922 /* fallback to unsupported cpu models */ 923 cpu->model = NULL; 924 } 925 } 926 #endif 927 928 static void s390_qemu_cpu_model_initfn(Object *obj) 929 { 930 S390CPU *cpu = S390_CPU(obj); 931 932 cpu->model = g_malloc0(sizeof(*cpu->model)); 933 /* TCG emulates a z900 */ 934 cpu->model->def = &s390_cpu_defs[0]; 935 bitmap_copy(cpu->model->features, cpu->model->def->default_feat, 936 S390_FEAT_MAX); 937 } 938 939 static void s390_cpu_model_finalize(Object *obj) 940 { 941 S390CPU *cpu = S390_CPU(obj); 942 943 g_free(cpu->model); 944 cpu->model = NULL; 945 } 946 947 static bool get_is_migration_safe(Object *obj, Error **errp) 948 { 949 return S390_CPU_GET_CLASS(obj)->is_migration_safe; 950 } 951 952 static bool get_is_static(Object *obj, Error **errp) 953 { 954 return S390_CPU_GET_CLASS(obj)->is_static; 955 } 956 957 static char *get_description(Object *obj, Error **errp) 958 { 959 return g_strdup(S390_CPU_GET_CLASS(obj)->desc); 960 } 961 962 void s390_cpu_model_class_register_props(ObjectClass *oc) 963 { 964 object_class_property_add_bool(oc, "migration-safe", get_is_migration_safe, 965 NULL, NULL); 966 object_class_property_add_bool(oc, "static", get_is_static, 967 NULL, NULL); 968 object_class_property_add_str(oc, "description", get_description, NULL, 969 NULL); 970 } 971 972 #ifdef CONFIG_KVM 973 static void s390_host_cpu_model_class_init(ObjectClass *oc, void *data) 974 { 975 S390CPUClass *xcc = S390_CPU_CLASS(oc); 976 977 xcc->kvm_required = true; 978 xcc->desc = "KVM only: All recognized features"; 979 } 980 #endif 981 982 static void s390_base_cpu_model_class_init(ObjectClass *oc, void *data) 983 { 984 S390CPUClass *xcc = S390_CPU_CLASS(oc); 985 986 /* all base models are migration safe */ 987 xcc->cpu_def = (const S390CPUDef *) data; 988 xcc->is_migration_safe = true; 989 xcc->is_static = true; 990 xcc->desc = xcc->cpu_def->desc; 991 } 992 993 static void s390_cpu_model_class_init(ObjectClass *oc, void *data) 994 { 995 S390CPUClass *xcc = S390_CPU_CLASS(oc); 996 997 /* model that can change between QEMU versions */ 998 xcc->cpu_def = (const S390CPUDef *) data; 999 xcc->is_migration_safe = true; 1000 xcc->desc = xcc->cpu_def->desc; 1001 } 1002 1003 static void s390_qemu_cpu_model_class_init(ObjectClass *oc, void *data) 1004 { 1005 S390CPUClass *xcc = S390_CPU_CLASS(oc); 1006 1007 xcc->is_migration_safe = true; 1008 xcc->desc = g_strdup_printf("QEMU Virtual CPU version %s", 1009 qemu_hw_version()); 1010 } 1011 1012 #define S390_CPU_TYPE_SUFFIX "-" TYPE_S390_CPU 1013 #define S390_CPU_TYPE_NAME(name) (name S390_CPU_TYPE_SUFFIX) 1014 1015 /* Generate type name for a cpu model. Caller has to free the string. */ 1016 static char *s390_cpu_type_name(const char *model_name) 1017 { 1018 return g_strdup_printf(S390_CPU_TYPE_NAME("%s"), model_name); 1019 } 1020 1021 /* Generate type name for a base cpu model. Caller has to free the string. */ 1022 static char *s390_base_cpu_type_name(const char *model_name) 1023 { 1024 return g_strdup_printf(S390_CPU_TYPE_NAME("%s-base"), model_name); 1025 } 1026 1027 ObjectClass *s390_cpu_class_by_name(const char *name) 1028 { 1029 char *typename = s390_cpu_type_name(name); 1030 ObjectClass *oc; 1031 1032 oc = object_class_by_name(typename); 1033 g_free(typename); 1034 return oc; 1035 } 1036 1037 static const TypeInfo qemu_s390_cpu_type_info = { 1038 .name = S390_CPU_TYPE_NAME("qemu"), 1039 .parent = TYPE_S390_CPU, 1040 .instance_init = s390_qemu_cpu_model_initfn, 1041 .instance_finalize = s390_cpu_model_finalize, 1042 .class_init = s390_qemu_cpu_model_class_init, 1043 }; 1044 1045 #ifdef CONFIG_KVM 1046 static const TypeInfo host_s390_cpu_type_info = { 1047 .name = S390_CPU_TYPE_NAME("host"), 1048 .parent = TYPE_S390_CPU, 1049 .instance_init = s390_host_cpu_model_initfn, 1050 .instance_finalize = s390_cpu_model_finalize, 1051 .class_init = s390_host_cpu_model_class_init, 1052 }; 1053 #endif 1054 1055 static void register_types(void) 1056 { 1057 int i; 1058 1059 /* init all bitmaps from gnerated data initially */ 1060 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 1061 s390_init_feat_bitmap(s390_cpu_defs[i].base_init, 1062 s390_cpu_defs[i].base_feat); 1063 s390_init_feat_bitmap(s390_cpu_defs[i].default_init, 1064 s390_cpu_defs[i].default_feat); 1065 s390_init_feat_bitmap(s390_cpu_defs[i].full_init, 1066 s390_cpu_defs[i].full_feat); 1067 } 1068 1069 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { 1070 char *base_name = s390_base_cpu_type_name(s390_cpu_defs[i].name); 1071 TypeInfo ti_base = { 1072 .name = base_name, 1073 .parent = TYPE_S390_CPU, 1074 .instance_init = s390_cpu_model_initfn, 1075 .instance_finalize = s390_cpu_model_finalize, 1076 .class_init = s390_base_cpu_model_class_init, 1077 .class_data = (void *) &s390_cpu_defs[i], 1078 }; 1079 char *name = s390_cpu_type_name(s390_cpu_defs[i].name); 1080 TypeInfo ti = { 1081 .name = name, 1082 .parent = TYPE_S390_CPU, 1083 .instance_init = s390_cpu_model_initfn, 1084 .instance_finalize = s390_cpu_model_finalize, 1085 .class_init = s390_cpu_model_class_init, 1086 .class_data = (void *) &s390_cpu_defs[i], 1087 }; 1088 1089 type_register_static(&ti_base); 1090 type_register_static(&ti); 1091 g_free(base_name); 1092 g_free(name); 1093 } 1094 1095 type_register_static(&qemu_s390_cpu_type_info); 1096 #ifdef CONFIG_KVM 1097 type_register_static(&host_s390_cpu_type_info); 1098 #endif 1099 } 1100 1101 type_init(register_types) 1102