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