target/s390x/cpu_models.c

   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 "internal.h"
  16 #include "kvm_s390x.h"
  17 #include "sysemu/kvm.h"
  18 #include "sysemu/tcg.h"
  19 #include "qapi/error.h"
  20 #include "qapi/visitor.h"
  21 #include "qemu/error-report.h"
  22 #include "qemu/module.h"
  23 #include "qemu/qemu-print.h"
  24 #include "qapi/qmp/qerror.h"
  25 #include "qapi/qobject-input-visitor.h"
  26 #include "qapi/qmp/qdict.h"
  27 #ifndef CONFIG_USER_ONLY
  28 #include "sysemu/arch_init.h"
  29 #include "hw/pci/pci.h"
  30 #endif
  31 #include "qapi/qapi-commands-machine-target.h"
  32
  33 #define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \
  34     {                                                                    \
  35         .name = _name,                                                   \
  36         .type = _type,                                                   \
  37         .gen = _gen,                                                     \
  38         .ec_ga = _ec_ga,                                                 \
  39         .mha_pow = _mha_pow,                                             \
  40         .hmfai = _hmfai,                                                 \
  41         .desc = _desc,                                                   \
  42         .base_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _BASE },  \
  43         .default_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _DEFAULT },  \
  44         .full_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _FULL },  \
  45     }
  46
  47 /*
  48  * CPU definition list in order of release. Up to generation 14 base features
  49  * of a following release have been a superset of the previous release. With
  50  * generation 15 one base feature and one optional feature have been deprecated.
  51  */
  52 static S390CPUDef s390_cpu_defs[] = {
  53     CPUDEF_INIT(0x2064, 7, 1, 38, 0x00000000U, "z900", "IBM zSeries 900 GA1"),
  54     CPUDEF_INIT(0x2064, 7, 2, 38, 0x00000000U, "z900.2", "IBM zSeries 900 GA2"),
  55     CPUDEF_INIT(0x2064, 7, 3, 38, 0x00000000U, "z900.3", "IBM zSeries 900 GA3"),
  56     CPUDEF_INIT(0x2066, 7, 3, 38, 0x00000000U, "z800", "IBM zSeries 800 GA1"),
  57     CPUDEF_INIT(0x2084, 8, 1, 38, 0x00000000U, "z990", "IBM zSeries 990 GA1"),
  58     CPUDEF_INIT(0x2084, 8, 2, 38, 0x00000000U, "z990.2", "IBM zSeries 990 GA2"),
  59     CPUDEF_INIT(0x2084, 8, 3, 38, 0x00000000U, "z990.3", "IBM zSeries 990 GA3"),
  60     CPUDEF_INIT(0x2086, 8, 3, 38, 0x00000000U, "z890", "IBM zSeries 880 GA1"),
  61     CPUDEF_INIT(0x2084, 8, 4, 38, 0x00000000U, "z990.4", "IBM zSeries 990 GA4"),
  62     CPUDEF_INIT(0x2086, 8, 4, 38, 0x00000000U, "z890.2", "IBM zSeries 880 GA2"),
  63     CPUDEF_INIT(0x2084, 8, 5, 38, 0x00000000U, "z990.5", "IBM zSeries 990 GA5"),
  64     CPUDEF_INIT(0x2086, 8, 5, 38, 0x00000000U, "z890.3", "IBM zSeries 880 GA3"),
  65     CPUDEF_INIT(0x2094, 9, 1, 40, 0x00000000U, "z9EC", "IBM System z9 EC GA1"),
  66     CPUDEF_INIT(0x2094, 9, 2, 40, 0x00000000U, "z9EC.2", "IBM System z9 EC GA2"),
  67     CPUDEF_INIT(0x2096, 9, 2, 40, 0x00000000U, "z9BC", "IBM System z9 BC GA1"),
  68     CPUDEF_INIT(0x2094, 9, 3, 40, 0x00000000U, "z9EC.3", "IBM System z9 EC GA3"),
  69     CPUDEF_INIT(0x2096, 9, 3, 40, 0x00000000U, "z9BC.2", "IBM System z9 BC GA2"),
  70     CPUDEF_INIT(0x2097, 10, 1, 43, 0x00000000U, "z10EC", "IBM System z10 EC GA1"),
  71     CPUDEF_INIT(0x2097, 10, 2, 43, 0x00000000U, "z10EC.2", "IBM System z10 EC GA2"),
  72     CPUDEF_INIT(0x2098, 10, 2, 43, 0x00000000U, "z10BC", "IBM System z10 BC GA1"),
  73     CPUDEF_INIT(0x2097, 10, 3, 43, 0x00000000U, "z10EC.3", "IBM System z10 EC GA3"),
  74     CPUDEF_INIT(0x2098, 10, 3, 43, 0x00000000U, "z10BC.2", "IBM System z10 BC GA2"),
  75     CPUDEF_INIT(0x2817, 11, 1, 44, 0x08000000U, "z196", "IBM zEnterprise 196 GA1"),
  76     CPUDEF_INIT(0x2817, 11, 2, 44, 0x08000000U, "z196.2", "IBM zEnterprise 196 GA2"),
  77     CPUDEF_INIT(0x2818, 11, 2, 44, 0x08000000U, "z114", "IBM zEnterprise 114 GA1"),
  78     CPUDEF_INIT(0x2827, 12, 1, 44, 0x08000000U, "zEC12", "IBM zEnterprise EC12 GA1"),
  79     CPUDEF_INIT(0x2827, 12, 2, 44, 0x08000000U, "zEC12.2", "IBM zEnterprise EC12 GA2"),
  80     CPUDEF_INIT(0x2828, 12, 2, 44, 0x08000000U, "zBC12", "IBM zEnterprise BC12 GA1"),
  81     CPUDEF_INIT(0x2964, 13, 1, 47, 0x08000000U, "z13", "IBM z13 GA1"),
  82     CPUDEF_INIT(0x2964, 13, 2, 47, 0x08000000U, "z13.2", "IBM z13 GA2"),
  83     CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"),
  84     CPUDEF_INIT(0x3906, 14, 1, 47, 0x08000000U, "z14", "IBM z14 GA1"),
  85     CPUDEF_INIT(0x3906, 14, 2, 47, 0x08000000U, "z14.2", "IBM z14 GA2"),
  86     CPUDEF_INIT(0x3907, 14, 1, 47, 0x08000000U, "z14ZR1", "IBM z14 Model ZR1 GA1"),
  87     CPUDEF_INIT(0x8561, 15, 1, 47, 0x08000000U, "gen15a", "IBM 8561 GA1"),
  88     CPUDEF_INIT(0x8562, 15, 1, 47, 0x08000000U, "gen15b", "IBM 8562 GA1"),
  89 };
  90
  91 #define QEMU_MAX_CPU_TYPE 0x2964
  92 #define QEMU_MAX_CPU_GEN 13
  93 #define QEMU_MAX_CPU_EC_GA 2
  94 static const S390FeatInit qemu_max_cpu_feat_init = { S390_FEAT_LIST_QEMU_MAX };
  95 static S390FeatBitmap qemu_max_cpu_feat;
  96
  97 /* features part of a base model but not relevant for finding a base model */
  98 S390FeatBitmap ignored_base_feat;
  99
 100 void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat)
 101 {
 102     const S390CPUDef *def;
 103
 104     def = s390_find_cpu_def(0, gen, ec_ga, NULL);
 105     clear_bit(feat, (unsigned long *)&def->default_feat);
 106 }
 107
 108 void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat)
 109 {
 110     int i;
 111
 112     for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
 113         const S390CPUDef *def = &s390_cpu_defs[i];
 114
 115         if (def->gen < gen) {
 116             continue;
 117         }
 118         if (def->gen == gen && def->ec_ga < ec_ga) {
 119             continue;
 120         }
 121
 122         clear_bit(feat, (unsigned long *)&def->default_feat);
 123     }
 124 }
 125
 126 void s390_cpudef_group_featoff_greater(uint8_t gen, uint8_t ec_ga,
 127                                        S390FeatGroup group)
 128 {
 129     const S390FeatGroupDef *group_def = s390_feat_group_def(group);
 130     S390FeatBitmap group_def_off;
 131     int i;
 132
 133     bitmap_complement(group_def_off, group_def->feat, S390_FEAT_MAX);
 134
 135     for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
 136         const S390CPUDef *cpu_def = &s390_cpu_defs[i];
 137
 138         if (cpu_def->gen < gen) {
 139             continue;
 140         }
 141         if (cpu_def->gen == gen && cpu_def->ec_ga < ec_ga) {
 142             continue;
 143         }
 144
 145         bitmap_and((unsigned long *)&cpu_def->default_feat,
 146                    cpu_def->default_feat, group_def_off, S390_FEAT_MAX);
 147     }
 148 }
 149
 150 uint32_t s390_get_hmfai(void)
 151 {
 152     static S390CPU *cpu;
 153
 154     if (!cpu) {
 155         cpu = S390_CPU(qemu_get_cpu(0));
 156     }
 157
 158     if (!cpu || !cpu->model) {
 159         return 0;
 160     }
 161     return cpu->model->def->hmfai;
 162 }
 163
 164 uint8_t s390_get_mha_pow(void)
 165 {
 166     static S390CPU *cpu;
 167
 168     if (!cpu) {
 169         cpu = S390_CPU(qemu_get_cpu(0));
 170     }
 171
 172     if (!cpu || !cpu->model) {
 173         return 0;
 174     }
 175     return cpu->model->def->mha_pow;
 176 }
 177
 178 uint32_t s390_get_ibc_val(void)
 179 {
 180     uint16_t unblocked_ibc, lowest_ibc;
 181     static S390CPU *cpu;
 182
 183     if (!cpu) {
 184         cpu = S390_CPU(qemu_get_cpu(0));
 185     }
 186
 187     if (!cpu || !cpu->model) {
 188         return 0;
 189     }
 190     unblocked_ibc = s390_ibc_from_cpu_model(cpu->model);
 191     lowest_ibc = cpu->model->lowest_ibc;
 192     /* the lowest_ibc always has to be <= unblocked_ibc */
 193     if (!lowest_ibc || lowest_ibc > unblocked_ibc) {
 194         return 0;
 195     }
 196     return ((uint32_t) lowest_ibc << 16) | unblocked_ibc;
 197 }
 198
 199 void s390_get_feat_block(S390FeatType type, uint8_t *data)
 200 {
 201     static S390CPU *cpu;
 202
 203     if (!cpu) {
 204         cpu = S390_CPU(qemu_get_cpu(0));
 205     }
 206
 207     if (!cpu || !cpu->model) {
 208         return;
 209     }
 210     s390_fill_feat_block(cpu->model->features, type, data);
 211 }
 212
 213 bool s390_has_feat(S390Feat feat)
 214 {
 215     static S390CPU *cpu;
 216
 217     if (!cpu) {
 218         cpu = S390_CPU(qemu_get_cpu(0));
 219     }
 220
 221     if (!cpu || !cpu->model) {
 222 #ifdef CONFIG_KVM
 223         if (kvm_enabled()) {
 224             if (feat == S390_FEAT_VECTOR) {
 225                 return kvm_check_extension(kvm_state,
 226                                            KVM_CAP_S390_VECTOR_REGISTERS);
 227             }
 228             if (feat == S390_FEAT_RUNTIME_INSTRUMENTATION) {
 229                 return kvm_s390_get_ri();
 230             }
 231             if (feat == S390_FEAT_MSA_EXT_3) {
 232                 return true;
 233             }
 234         }
 235 #endif
 236         if (feat == S390_FEAT_ZPCI) {
 237             return true;
 238         }
 239         return 0;
 240     }
 241     return test_bit(feat, cpu->model->features);
 242 }
 243
 244 uint8_t s390_get_gen_for_cpu_type(uint16_t type)
 245 {
 246     int i;
 247
 248     for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
 249         if (s390_cpu_defs[i].type == type) {
 250             return s390_cpu_defs[i].gen;
 251         }
 252     }
 253     return 0;
 254 }
 255
 256 const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
 257                                     S390FeatBitmap features)
 258 {
 259     const S390CPUDef *last_compatible = NULL;
 260     const S390CPUDef *matching_cpu_type = NULL;
 261     int i;
 262
 263     if (!gen) {
 264         ec_ga = 0;
 265     }
 266     if (!gen && type) {
 267         gen = s390_get_gen_for_cpu_type(type);
 268     }
 269
 270     for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
 271         const S390CPUDef *def = &s390_cpu_defs[i];
 272         S390FeatBitmap missing;
 273
 274         /* don't even try newer generations if we know the generation */
 275         if (gen) {
 276             if (def->gen > gen) {
 277                 break;
 278             } else if (def->gen == gen && ec_ga && def->ec_ga > ec_ga) {
 279                 break;
 280             }
 281         }
 282
 283         if (features) {
 284             /* see if the model satisfies the minimum features */
 285             bitmap_andnot(missing, def->base_feat, features, S390_FEAT_MAX);
 286             /*
 287              * Ignore certain features that are in the base model, but not
 288              * relevant for the search (esp. MSA subfunctions).
 289              */
 290             bitmap_andnot(missing, missing, ignored_base_feat, S390_FEAT_MAX);
 291             if (!bitmap_empty(missing, S390_FEAT_MAX)) {
 292                 break;
 293             }
 294         }
 295
 296         /* stop the search if we found the exact model */
 297         if (def->type == type && def->ec_ga == ec_ga) {
 298             return def;
 299         }
 300         /* remember if we've at least seen one with the same cpu type */
 301         if (def->type == type) {
 302             matching_cpu_type = def;
 303         }
 304         last_compatible = def;
 305     }
 306     /* prefer the model with the same cpu type, esp. don't take the BC for EC */
 307     if (matching_cpu_type) {
 308         return matching_cpu_type;
 309     }
 310     return last_compatible;
 311 }
 312
 313 static void s390_print_cpu_model_list_entry(gpointer data, gpointer user_data)
 314 {
 315     const S390CPUClass *scc = S390_CPU_CLASS((ObjectClass *)data);
 316     char *name = g_strdup(object_class_get_name((ObjectClass *)data));
 317     const char *details = "";
 318
 319     if (scc->is_static) {
 320         details = "(static, migration-safe)";
 321     } else if (scc->is_migration_safe) {
 322         details = "(migration-safe)";
 323     }
 324
 325     /* strip off the -s390x-cpu */
 326     g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0;
 327     qemu_printf("s390 %-15s %-35s %s\n", name, scc->desc, details);
 328     g_free(name);
 329 }
 330
 331 static gint s390_cpu_list_compare(gconstpointer a, gconstpointer b)
 332 {
 333     const S390CPUClass *cc_a = S390_CPU_CLASS((ObjectClass *)a);
 334     const S390CPUClass *cc_b = S390_CPU_CLASS((ObjectClass *)b);
 335     const char *name_a = object_class_get_name((ObjectClass *)a);
 336     const char *name_b = object_class_get_name((ObjectClass *)b);
 337
 338     /*
 339      * Move qemu, host and max to the top of the list, qemu first, host second,
 340      * max third.
 341      */
 342     if (name_a[0] == 'q') {
 343         return -1;
 344     } else if (name_b[0] == 'q') {
 345         return 1;
 346     } else if (name_a[0] == 'h') {
 347         return -1;
 348     } else if (name_b[0] == 'h') {
 349         return 1;
 350     } else if (name_a[0] == 'm') {
 351         return -1;
 352     } else if (name_b[0] == 'm') {
 353         return 1;
 354     }
 355
 356     /* keep the same order we have in our table (sorted by release date) */
 357     if (cc_a->cpu_def != cc_b->cpu_def) {
 358         return cc_a->cpu_def - cc_b->cpu_def;
 359     }
 360
 361     /* exact same definition - list base model first */
 362     return cc_a->is_static ? -1 : 1;
 363 }
 364
 365 void s390_cpu_list(void)
 366 {
 367     S390FeatGroup group;
 368     S390Feat feat;
 369     GSList *list;
 370
 371     list = object_class_get_list(TYPE_S390_CPU, false);
 372     list = g_slist_sort(list, s390_cpu_list_compare);
 373     g_slist_foreach(list, s390_print_cpu_model_list_entry, NULL);
 374     g_slist_free(list);
 375
 376     qemu_printf("\nRecognized feature flags:\n");
 377     for (feat = 0; feat < S390_FEAT_MAX; feat++) {
 378         const S390FeatDef *def = s390_feat_def(feat);
 379
 380         qemu_printf("%-20s %-50s\n", def->name, def->desc);
 381     }
 382
 383     qemu_printf("\nRecognized feature groups:\n");
 384     for (group = 0; group < S390_FEAT_GROUP_MAX; group++) {
 385         const S390FeatGroupDef *def = s390_feat_group_def(group);
 386
 387         qemu_printf("%-20s %-50s\n", def->name, def->desc);
 388     }
 389 }
 390
 391 static S390CPUModel *get_max_cpu_model(Error **errp);
 392
 393 #ifndef CONFIG_USER_ONLY
 394 static void list_add_feat(const char *name, void *opaque);
 395
 396 static void check_unavailable_features(const S390CPUModel *max_model,
 397                                        const S390CPUModel *model,
 398                                        strList **unavailable)
 399 {
 400     S390FeatBitmap missing;
 401
 402     /* check general model compatibility */
 403     if (max_model->def->gen < model->def->gen ||
 404         (max_model->def->gen == model->def->gen &&
 405          max_model->def->ec_ga < model->def->ec_ga)) {
 406         list_add_feat("type", unavailable);
 407     }
 408
 409     /* detect missing features if any to properly report them */
 410     bitmap_andnot(missing, model->features, max_model->features,
 411                   S390_FEAT_MAX);
 412     if (!bitmap_empty(missing, S390_FEAT_MAX)) {
 413         s390_feat_bitmap_to_ascii(missing, unavailable, list_add_feat);
 414     }
 415 }
 416
 417 struct CpuDefinitionInfoListData {
 418     CpuDefinitionInfoList *list;
 419     S390CPUModel *model;
 420 };
 421
 422 static void create_cpu_model_list(ObjectClass *klass, void *opaque)
 423 {
 424     struct CpuDefinitionInfoListData *cpu_list_data = opaque;
 425     CpuDefinitionInfoList **cpu_list = &cpu_list_data->list;
 426     CpuDefinitionInfoList *entry;
 427     CpuDefinitionInfo *info;
 428     char *name = g_strdup(object_class_get_name(klass));
 429     S390CPUClass *scc = S390_CPU_CLASS(klass);
 430
 431     /* strip off the -s390x-cpu */
 432     g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0;
 433     info = g_new0(CpuDefinitionInfo, 1);
 434     info->name = name;
 435     info->has_migration_safe = true;
 436     info->migration_safe = scc->is_migration_safe;
 437     info->q_static = scc->is_static;
 438     info->q_typename = g_strdup(object_class_get_name(klass));
 439     /* check for unavailable features */
 440     if (cpu_list_data->model) {
 441         Object *obj;
 442         S390CPU *sc;
 443         obj = object_new(object_class_get_name(klass));
 444         sc = S390_CPU(obj);
 445         if (sc->model) {
 446             info->has_unavailable_features = true;
 447             check_unavailable_features(cpu_list_data->model, sc->model,
 448                                        &info->unavailable_features);
 449         }
 450         object_unref(obj);
 451     }
 452
 453     entry = g_new0(CpuDefinitionInfoList, 1);
 454     entry->value = info;
 455     entry->next = *cpu_list;
 456     *cpu_list = entry;
 457 }
 458
 459 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
 460 {
 461     struct CpuDefinitionInfoListData list_data = {
 462         .list = NULL,
 463     };
 464
 465     list_data.model = get_max_cpu_model(errp);
 466     if (*errp) {
 467         error_free(*errp);
 468         *errp = NULL;
 469     }
 470
 471     object_class_foreach(create_cpu_model_list, TYPE_S390_CPU, false,
 472                          &list_data);
 473
 474     return list_data.list;
 475 }
 476
 477 static void cpu_model_from_info(S390CPUModel *model, const CpuModelInfo *info,
 478                                 Error **errp)
 479 {
 480     const QDict *qdict = NULL;
 481     const QDictEntry *e;
 482     Visitor *visitor;
 483     ObjectClass *oc;
 484     S390CPU *cpu;
 485     Object *obj;
 486
 487     if (info->props) {
 488         qdict = qobject_to(QDict, info->props);
 489         if (!qdict) {
 490             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 491             return;
 492         }
 493     }
 494
 495     oc = cpu_class_by_name(TYPE_S390_CPU, info->name);
 496     if (!oc) {
 497         error_setg(errp, "The CPU definition \'%s\' is unknown.", info->name);
 498         return;
 499     }
 500     if (S390_CPU_CLASS(oc)->kvm_required && !kvm_enabled()) {
 501         error_setg(errp, "The CPU definition '%s' requires KVM", info->name);
 502         return;
 503     }
 504     obj = object_new(object_class_get_name(oc));
 505     cpu = S390_CPU(obj);
 506
 507     if (!cpu->model) {
 508         error_setg(errp, "Details about the host CPU model are not available, "
 509                          "it cannot be used.");
 510         object_unref(obj);
 511         return;
 512     }
 513
 514     if (qdict) {
 515         visitor = qobject_input_visitor_new(info->props);
 516         visit_start_struct(visitor, NULL, NULL, 0, errp);
 517         if (*errp) {
 518             object_unref(obj);
 519             return;
 520         }
 521         for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
 522             object_property_set(obj, visitor, e->key, errp);
 523             if (*errp) {
 524                 break;
 525             }
 526         }
 527         if (!*errp) {
 528             visit_check_struct(visitor, errp);
 529         }
 530         visit_end_struct(visitor, NULL);
 531         visit_free(visitor);
 532         if (*errp) {
 533             object_unref(obj);
 534             return;
 535         }
 536     }
 537
 538     /* copy the model and throw the cpu away */
 539     memcpy(model, cpu->model, sizeof(*model));
 540     object_unref(obj);
 541 }
 542
 543 static void qdict_add_disabled_feat(const char *name, void *opaque)
 544 {
 545     qdict_put_bool(opaque, name, false);
 546 }
 547
 548 static void qdict_add_enabled_feat(const char *name, void *opaque)
 549 {
 550     qdict_put_bool(opaque, name, true);
 551 }
 552
 553 /* convert S390CPUDef into a static CpuModelInfo */
 554 static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model,
 555                                 bool delta_changes)
 556 {
 557     QDict *qdict = qdict_new();
 558     S390FeatBitmap bitmap;
 559
 560     /* always fallback to the static base model */
 561     info->name = g_strdup_printf("%s-base", model->def->name);
 562
 563     if (delta_changes) {
 564         /* features deleted from the base feature set */
 565         bitmap_andnot(bitmap, model->def->base_feat, model->features,
 566                       S390_FEAT_MAX);
 567         if (!bitmap_empty(bitmap, S390_FEAT_MAX)) {
 568             s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat);
 569         }
 570
 571         /* features added to the base feature set */
 572         bitmap_andnot(bitmap, model->features, model->def->base_feat,
 573                       S390_FEAT_MAX);
 574         if (!bitmap_empty(bitmap, S390_FEAT_MAX)) {
 575             s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_enabled_feat);
 576         }
 577     } else {
 578         /* expand all features */
 579         s390_feat_bitmap_to_ascii(model->features, qdict,
 580                                   qdict_add_enabled_feat);
 581         bitmap_complement(bitmap, model->features, S390_FEAT_MAX);
 582         s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat);
 583     }
 584
 585     if (!qdict_size(qdict)) {
 586         qobject_unref(qdict);
 587     } else {
 588         info->props = QOBJECT(qdict);
 589         info->has_props = true;
 590     }
 591 }
 592
 593 CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
 594                                                       CpuModelInfo *model,
 595                                                       Error **errp)
 596 {
 597     CpuModelExpansionInfo *expansion_info = NULL;
 598     S390CPUModel s390_model;
 599     bool delta_changes = false;
 600
 601     /* convert it to our internal representation */
 602     cpu_model_from_info(&s390_model, model, errp);
 603     if (*errp) {
 604         return NULL;
 605     }
 606
 607     if (type == CPU_MODEL_EXPANSION_TYPE_STATIC) {
 608         delta_changes = true;
 609     } else if (type != CPU_MODEL_EXPANSION_TYPE_FULL) {
 610         error_setg(errp, "The requested expansion type is not supported.");
 611         return NULL;
 612     }
 613
 614     /* convert it back to a static representation */
 615     expansion_info = g_new0(CpuModelExpansionInfo, 1);
 616     expansion_info->model = g_malloc0(sizeof(*expansion_info->model));
 617     cpu_info_from_model(expansion_info->model, &s390_model, delta_changes);
 618     return expansion_info;
 619 }
 620
 621 static void list_add_feat(const char *name, void *opaque)
 622 {
 623     strList **last = (strList **) opaque;
 624     strList *entry;
 625
 626     entry = g_new0(strList, 1);
 627     entry->value = g_strdup(name);
 628     entry->next = *last;
 629     *last = entry;
 630 }
 631
 632 CpuModelCompareInfo *qmp_query_cpu_model_comparison(CpuModelInfo *infoa,
 633                                                      CpuModelInfo *infob,
 634                                                      Error **errp)
 635 {
 636     CpuModelCompareResult feat_result, gen_result;
 637     CpuModelCompareInfo *compare_info;
 638     S390FeatBitmap missing, added;
 639     S390CPUModel modela, modelb;
 640
 641     /* convert both models to our internal representation */
 642     cpu_model_from_info(&modela, infoa, errp);
 643     if (*errp) {
 644         return NULL;
 645     }
 646     cpu_model_from_info(&modelb, infob, errp);
 647     if (*errp) {
 648         return NULL;
 649     }
 650     compare_info = g_new0(CpuModelCompareInfo, 1);
 651
 652     /* check the cpu generation and ga level */
 653     if (modela.def->gen == modelb.def->gen) {
 654         if (modela.def->ec_ga == modelb.def->ec_ga) {
 655             /* ec and corresponding bc are identical */
 656             gen_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL;
 657         } else if (modela.def->ec_ga < modelb.def->ec_ga) {
 658             gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET;
 659         } else {
 660             gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET;
 661         }
 662     } else if (modela.def->gen < modelb.def->gen) {
 663         gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET;
 664     } else {
 665         gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET;
 666     }
 667     if (gen_result != CPU_MODEL_COMPARE_RESULT_IDENTICAL) {
 668         /* both models cannot be made identical */
 669         list_add_feat("type", &compare_info->responsible_properties);
 670     }
 671
 672     /* check the feature set */
 673     if (bitmap_equal(modela.features, modelb.features, S390_FEAT_MAX)) {
 674         feat_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL;
 675     } else {
 676         bitmap_andnot(missing, modela.features, modelb.features, S390_FEAT_MAX);
 677         s390_feat_bitmap_to_ascii(missing,
 678                                   &compare_info->responsible_properties,
 679                                   list_add_feat);
 680         bitmap_andnot(added, modelb.features, modela.features, S390_FEAT_MAX);
 681         s390_feat_bitmap_to_ascii(added, &compare_info->responsible_properties,
 682                                   list_add_feat);
 683         if (bitmap_empty(missing, S390_FEAT_MAX)) {
 684             feat_result = CPU_MODEL_COMPARE_RESULT_SUBSET;
 685         } else if (bitmap_empty(added, S390_FEAT_MAX)) {
 686             feat_result = CPU_MODEL_COMPARE_RESULT_SUPERSET;
 687         } else {
 688             feat_result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE;
 689         }
 690     }
 691
 692     /* combine the results */
 693     if (gen_result == feat_result) {
 694         compare_info->result = gen_result;
 695     } else if (feat_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) {
 696         compare_info->result = gen_result;
 697     } else if (gen_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) {
 698         compare_info->result = feat_result;
 699     } else {
 700         compare_info->result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE;
 701     }
 702     return compare_info;
 703 }
 704
 705 CpuModelBaselineInfo *qmp_query_cpu_model_baseline(CpuModelInfo *infoa,
 706                                                     CpuModelInfo *infob,
 707                                                     Error **errp)
 708 {
 709     CpuModelBaselineInfo *baseline_info;
 710     S390CPUModel modela, modelb, model;
 711     uint16_t cpu_type;
 712     uint8_t max_gen_ga;
 713     uint8_t max_gen;
 714
 715     /* convert both models to our internal representation */
 716     cpu_model_from_info(&modela, infoa, errp);
 717     if (*errp) {
 718         return NULL;
 719     }
 720
 721     cpu_model_from_info(&modelb, infob, errp);
 722     if (*errp) {
 723         return NULL;
 724     }
 725
 726     /* features both models support */
 727     bitmap_and(model.features, modela.features, modelb.features, S390_FEAT_MAX);
 728
 729     /* detect the maximum model not regarding features */
 730     if (modela.def->gen == modelb.def->gen) {
 731         if (modela.def->type == modelb.def->type) {
 732             cpu_type = modela.def->type;
 733         } else {
 734             cpu_type = 0;
 735         }
 736         max_gen = modela.def->gen;
 737         max_gen_ga = MIN(modela.def->ec_ga, modelb.def->ec_ga);
 738     } else if (modela.def->gen > modelb.def->gen) {
 739         cpu_type = modelb.def->type;
 740         max_gen = modelb.def->gen;
 741         max_gen_ga = modelb.def->ec_ga;
 742     } else {
 743         cpu_type = modela.def->type;
 744         max_gen = modela.def->gen;
 745         max_gen_ga = modela.def->ec_ga;
 746     }
 747
 748     model.def = s390_find_cpu_def(cpu_type, max_gen, max_gen_ga,
 749                                   model.features);
 750
 751     /* models without early base features (esan3) are bad */
 752     if (!model.def) {
 753         error_setg(errp, "No compatible CPU model could be created as"
 754                    " important base features are disabled");
 755         return NULL;
 756     }
 757
 758     /* strip off features not part of the max model */
 759     bitmap_and(model.features, model.features, model.def->full_feat,
 760                S390_FEAT_MAX);
 761
 762     baseline_info = g_new0(CpuModelBaselineInfo, 1);
 763     baseline_info->model = g_malloc0(sizeof(*baseline_info->model));
 764     cpu_info_from_model(baseline_info->model, &model, true);
 765     return baseline_info;
 766 }
 767 #endif
 768
 769 static void check_consistency(const S390CPUModel *model)
 770 {
 771     static int dep[][2] = {
 772         { S390_FEAT_IPTE_RANGE, S390_FEAT_DAT_ENH },
 773         { S390_FEAT_IDTE_SEGMENT, S390_FEAT_DAT_ENH },
 774         { S390_FEAT_IDTE_REGION, S390_FEAT_DAT_ENH },
 775         { S390_FEAT_IDTE_REGION, S390_FEAT_IDTE_SEGMENT },
 776         { S390_FEAT_LOCAL_TLB_CLEARING, S390_FEAT_DAT_ENH},
 777         { S390_FEAT_LONG_DISPLACEMENT_FAST, S390_FEAT_LONG_DISPLACEMENT },
 778         { S390_FEAT_DFP_FAST, S390_FEAT_DFP },
 779         { S390_FEAT_TRANSACTIONAL_EXE, S390_FEAT_STFLE_49 },
 780         { S390_FEAT_EDAT_2, S390_FEAT_EDAT},
 781         { S390_FEAT_MSA_EXT_5, S390_FEAT_KIMD_SHA_512 },
 782         { S390_FEAT_MSA_EXT_5, S390_FEAT_KLMD_SHA_512 },
 783         { S390_FEAT_MSA_EXT_4, S390_FEAT_MSA_EXT_3 },
 784         { S390_FEAT_SIE_CMMA, S390_FEAT_CMM },
 785         { S390_FEAT_SIE_CMMA, S390_FEAT_SIE_GSLS },
 786         { S390_FEAT_SIE_PFMFI, S390_FEAT_EDAT },
 787         { S390_FEAT_MSA_EXT_8, S390_FEAT_MSA_EXT_3 },
 788         { S390_FEAT_MSA_EXT_9, S390_FEAT_MSA_EXT_3 },
 789         { S390_FEAT_MSA_EXT_9, S390_FEAT_MSA_EXT_4 },
 790         { S390_FEAT_MULTIPLE_EPOCH, S390_FEAT_TOD_CLOCK_STEERING },
 791         { S390_FEAT_VECTOR_PACKED_DECIMAL, S390_FEAT_VECTOR },
 792         { S390_FEAT_VECTOR_ENH, S390_FEAT_VECTOR },
 793         { S390_FEAT_INSTRUCTION_EXEC_PROT, S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2 },
 794         { S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2, S390_FEAT_ESOP },
 795         { S390_FEAT_CMM_NT, S390_FEAT_CMM },
 796         { S390_FEAT_GUARDED_STORAGE, S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2 },
 797         { S390_FEAT_MULTIPLE_EPOCH, S390_FEAT_STORE_CLOCK_FAST },
 798         { S390_FEAT_MULTIPLE_EPOCH, S390_FEAT_TOD_CLOCK_STEERING },
 799         { S390_FEAT_SEMAPHORE_ASSIST, S390_FEAT_STFLE_49 },
 800         { S390_FEAT_KIMD_SHA3_224, S390_FEAT_MSA },
 801         { S390_FEAT_KIMD_SHA3_256, S390_FEAT_MSA },
 802         { S390_FEAT_KIMD_SHA3_384, S390_FEAT_MSA },
 803         { S390_FEAT_KIMD_SHA3_512, S390_FEAT_MSA },
 804         { S390_FEAT_KIMD_SHAKE_128, S390_FEAT_MSA },
 805         { S390_FEAT_KIMD_SHAKE_256, S390_FEAT_MSA },
 806         { S390_FEAT_KLMD_SHA3_224, S390_FEAT_MSA },
 807         { S390_FEAT_KLMD_SHA3_256, S390_FEAT_MSA },
 808         { S390_FEAT_KLMD_SHA3_384, S390_FEAT_MSA },
 809         { S390_FEAT_KLMD_SHA3_512, S390_FEAT_MSA },
 810         { S390_FEAT_KLMD_SHAKE_128, S390_FEAT_MSA },
 811         { S390_FEAT_KLMD_SHAKE_256, S390_FEAT_MSA },
 812         { S390_FEAT_PRNO_TRNG_QRTCR, S390_FEAT_MSA_EXT_5 },
 813         { S390_FEAT_PRNO_TRNG, S390_FEAT_MSA_EXT_5 },
 814         { S390_FEAT_SIE_KSS, S390_FEAT_SIE_F2 },
 815         { S390_FEAT_AP_QUERY_CONFIG_INFO, S390_FEAT_AP },
 816         { S390_FEAT_AP_FACILITIES_TEST, S390_FEAT_AP },
 817         { S390_FEAT_PTFF_QSIE, S390_FEAT_MULTIPLE_EPOCH },
 818         { S390_FEAT_PTFF_QTOUE, S390_FEAT_MULTIPLE_EPOCH },
 819         { S390_FEAT_PTFF_STOE, S390_FEAT_MULTIPLE_EPOCH },
 820         { S390_FEAT_PTFF_STOUE, S390_FEAT_MULTIPLE_EPOCH },
 821         { S390_FEAT_AP_QUEUE_INTERRUPT_CONTROL, S390_FEAT_AP },
 822     };
 823     int i;
 824
 825     for (i = 0; i < ARRAY_SIZE(dep); i++) {
 826         if (test_bit(dep[i][0], model->features) &&
 827             !test_bit(dep[i][1], model->features)) {
 828             warn_report("\'%s\' requires \'%s\'.",
 829                         s390_feat_def(dep[i][0])->name,
 830                         s390_feat_def(dep[i][1])->name);
 831         }
 832     }
 833 }
 834
 835 static void error_prepend_missing_feat(const char *name, void *opaque)
 836 {
 837     error_prepend((Error **) opaque, "%s ", name);
 838 }
 839
 840 static void check_compatibility(const S390CPUModel *max_model,
 841                                 const S390CPUModel *model, Error **errp)
 842 {
 843     S390FeatBitmap missing;
 844
 845     if (model->def->gen > max_model->def->gen) {
 846         error_setg(errp, "Selected CPU generation is too new. Maximum "
 847                    "supported model in the configuration: \'%s\'",
 848                    max_model->def->name);
 849         return;
 850     } else if (model->def->gen == max_model->def->gen &&
 851                model->def->ec_ga > max_model->def->ec_ga) {
 852         error_setg(errp, "Selected CPU GA level is too new. Maximum "
 853                    "supported model in the configuration: \'%s\'",
 854                    max_model->def->name);
 855         return;
 856     }
 857
 858     /* detect the missing features to properly report them */
 859     bitmap_andnot(missing, model->features, max_model->features, S390_FEAT_MAX);
 860     if (bitmap_empty(missing, S390_FEAT_MAX)) {
 861         return;
 862     }
 863
 864     error_setg(errp, " ");
 865     s390_feat_bitmap_to_ascii(missing, errp, error_prepend_missing_feat);
 866     error_prepend(errp, "Some features requested in the CPU model are not "
 867                   "available in the configuration: ");
 868 }
 869
 870 static S390CPUModel *get_max_cpu_model(Error **errp)
 871 {
 872     static S390CPUModel max_model;
 873     static bool cached;
 874
 875     if (cached) {
 876         return &max_model;
 877     }
 878
 879     if (kvm_enabled()) {
 880         kvm_s390_get_host_cpu_model(&max_model, errp);
 881     } else {
 882         max_model.def = s390_find_cpu_def(QEMU_MAX_CPU_TYPE, QEMU_MAX_CPU_GEN,
 883                                           QEMU_MAX_CPU_EC_GA, NULL);
 884         bitmap_copy(max_model.features, qemu_max_cpu_feat, S390_FEAT_MAX);
 885    }
 886     if (!*errp) {
 887         cached = true;
 888         return &max_model;
 889     }
 890     return NULL;
 891 }
 892
 893 static inline void apply_cpu_model(const S390CPUModel *model, Error **errp)
 894 {
 895 #ifndef CONFIG_USER_ONLY
 896     static S390CPUModel applied_model;
 897     static bool applied;
 898
 899     /*
 900      * We have the same model for all VCPUs. KVM can only be configured before
 901      * any VCPUs are defined in KVM.
 902      */
 903     if (applied) {
 904         if (model && memcmp(&applied_model, model, sizeof(S390CPUModel))) {
 905             error_setg(errp, "Mixed CPU models are not supported on s390x.");
 906         }
 907         return;
 908     }
 909
 910     if (kvm_enabled()) {
 911         kvm_s390_apply_cpu_model(model, errp);
 912     }
 913
 914     if (!*errp) {
 915         applied = true;
 916         if (model) {
 917             applied_model = *model;
 918         }
 919     }
 920 #endif
 921 }
 922
 923 void s390_realize_cpu_model(CPUState *cs, Error **errp)
 924 {
 925     S390CPUClass *xcc = S390_CPU_GET_CLASS(cs);
 926     S390CPU *cpu = S390_CPU(cs);
 927     const S390CPUModel *max_model;
 928
 929     if (xcc->kvm_required && !kvm_enabled()) {
 930         error_setg(errp, "CPU definition requires KVM");
 931         return;
 932     }
 933
 934     if (!cpu->model) {
 935         /* no host model support -> perform compatibility stuff */
 936         apply_cpu_model(NULL, errp);
 937         return;
 938     }
 939
 940     max_model = get_max_cpu_model(errp);
 941     if (*errp) {
 942         error_prepend(errp, "CPU models are not available: ");
 943         return;
 944     }
 945
 946     /* copy over properties that can vary */
 947     cpu->model->lowest_ibc = max_model->lowest_ibc;
 948     cpu->model->cpu_id = max_model->cpu_id;
 949     cpu->model->cpu_id_format = max_model->cpu_id_format;
 950     cpu->model->cpu_ver = max_model->cpu_ver;
 951
 952     check_consistency(cpu->model);
 953     check_compatibility(max_model, cpu->model, errp);
 954     if (*errp) {
 955         return;
 956     }
 957
 958     apply_cpu_model(cpu->model, errp);
 959
 960 #if !defined(CONFIG_USER_ONLY)
 961     cpu->env.cpuid = s390_cpuid_from_cpu_model(cpu->model);
 962     if (tcg_enabled()) {
 963         /* basic mode, write the cpu address into the first 4 bit of the ID */
 964         cpu->env.cpuid = deposit64(cpu->env.cpuid, 54, 4, cpu->env.core_id);
 965     }
 966 #endif
 967 }
 968
 969 static void get_feature(Object *obj, Visitor *v, const char *name,
 970                         void *opaque, Error **errp)
 971 {
 972     S390Feat feat = (S390Feat) opaque;
 973     S390CPU *cpu = S390_CPU(obj);
 974     bool value;
 975
 976     if (!cpu->model) {
 977         error_setg(errp, "Details about the host CPU model are not available, "
 978                          "features cannot be queried.");
 979         return;
 980     }
 981
 982     value = test_bit(feat, cpu->model->features);
 983     visit_type_bool(v, name, &value, errp);
 984 }
 985
 986 static void set_feature(Object *obj, Visitor *v, const char *name,
 987                         void *opaque, Error **errp)
 988 {
 989     S390Feat feat = (S390Feat) opaque;
 990     DeviceState *dev = DEVICE(obj);
 991     S390CPU *cpu = S390_CPU(obj);
 992     bool value;
 993
 994     if (dev->realized) {
 995         error_setg(errp, "Attempt to set property '%s' on '%s' after "
 996                    "it was realized", name, object_get_typename(obj));
 997         return;
 998     } else if (!cpu->model) {
 999         error_setg(errp, "Details about the host CPU model are not available, "
1000                          "features cannot be changed.");
1001         return;
1002     }
1003
1004     visit_type_bool(v, name, &value, errp);
1005     if (*errp) {
1006         return;
1007     }
1008     if (value) {
1009         if (!test_bit(feat, cpu->model->def->full_feat)) {
1010             error_setg(errp, "Feature '%s' is not available for CPU model '%s',"
1011                        " it was introduced with later models.",
1012                        name, cpu->model->def->name);
1013             return;
1014         }
1015         set_bit(feat, cpu->model->features);
1016     } else {
1017         clear_bit(feat, cpu->model->features);
1018     }
1019 }
1020
1021 static void get_feature_group(Object *obj, Visitor *v, const char *name,
1022                               void *opaque, Error **errp)
1023 {
1024     S390FeatGroup group = (S390FeatGroup) opaque;
1025     const S390FeatGroupDef *def = s390_feat_group_def(group);
1026     S390CPU *cpu = S390_CPU(obj);
1027     S390FeatBitmap tmp;
1028     bool value;
1029
1030     if (!cpu->model) {
1031         error_setg(errp, "Details about the host CPU model are not available, "
1032                          "features cannot be queried.");
1033         return;
1034     }
1035
1036     /* a group is enabled if all features are enabled */
1037     bitmap_and(tmp, cpu->model->features, def->feat, S390_FEAT_MAX);
1038     value = bitmap_equal(tmp, def->feat, S390_FEAT_MAX);
1039     visit_type_bool(v, name, &value, errp);
1040 }
1041
1042 static void set_feature_group(Object *obj, Visitor *v, const char *name,
1043                               void *opaque, Error **errp)
1044 {
1045     S390FeatGroup group = (S390FeatGroup) opaque;
1046     const S390FeatGroupDef *def = s390_feat_group_def(group);
1047     DeviceState *dev = DEVICE(obj);
1048     S390CPU *cpu = S390_CPU(obj);
1049     bool value;
1050
1051     if (dev->realized) {
1052         error_setg(errp, "Attempt to set property '%s' on '%s' after "
1053                    "it was realized", name, object_get_typename(obj));
1054         return;
1055     } else if (!cpu->model) {
1056         error_setg(errp, "Details about the host CPU model are not available, "
1057                          "features cannot be changed.");
1058         return;
1059     }
1060
1061     visit_type_bool(v, name, &value, errp);
1062     if (*errp) {
1063         return;
1064     }
1065     if (value) {
1066         /* groups are added in one shot, so an intersect is sufficient */
1067         if (!bitmap_intersects(def->feat, cpu->model->def->full_feat,
1068                                S390_FEAT_MAX)) {
1069             error_setg(errp, "Group '%s' is not available for CPU model '%s',"
1070                        " it was introduced with later models.",
1071                        name, cpu->model->def->name);
1072             return;
1073         }
1074         bitmap_or(cpu->model->features, cpu->model->features, def->feat,
1075                   S390_FEAT_MAX);
1076     } else {
1077         bitmap_andnot(cpu->model->features, cpu->model->features, def->feat,
1078                       S390_FEAT_MAX);
1079     }
1080 }
1081
1082 void s390_cpu_model_register_props(Object *obj)
1083 {
1084     S390FeatGroup group;
1085     S390Feat feat;
1086
1087     for (feat = 0; feat < S390_FEAT_MAX; feat++) {
1088         const S390FeatDef *def = s390_feat_def(feat);
1089         object_property_add(obj, def->name, "bool", get_feature,
1090                             set_feature, NULL, (void *) feat, NULL);
1091         object_property_set_description(obj, def->name, def->desc , NULL);
1092     }
1093     for (group = 0; group < S390_FEAT_GROUP_MAX; group++) {
1094         const S390FeatGroupDef *def = s390_feat_group_def(group);
1095         object_property_add(obj, def->name, "bool", get_feature_group,
1096                             set_feature_group, NULL, (void *) group, NULL);
1097         object_property_set_description(obj, def->name, def->desc , NULL);
1098     }
1099 }
1100
1101 static void s390_cpu_model_initfn(Object *obj)
1102 {
1103     S390CPU *cpu = S390_CPU(obj);
1104     S390CPUClass *xcc = S390_CPU_GET_CLASS(cpu);
1105
1106     cpu->model = g_malloc0(sizeof(*cpu->model));
1107     /* copy the model, so we can modify it */
1108     cpu->model->def = xcc->cpu_def;
1109     if (xcc->is_static) {
1110         /* base model - features will never change */
1111         bitmap_copy(cpu->model->features, cpu->model->def->base_feat,
1112                     S390_FEAT_MAX);
1113     } else {
1114         /* latest model - features can change */
1115         bitmap_copy(cpu->model->features,
1116                     cpu->model->def->default_feat, S390_FEAT_MAX);
1117     }
1118 }
1119
1120 static S390CPUDef s390_qemu_cpu_def;
1121 static S390CPUModel s390_qemu_cpu_model;
1122
1123 /* Set the qemu CPU model (on machine initialization). Must not be called
1124  * once CPUs have been created.
1125  */
1126 void s390_set_qemu_cpu_model(uint16_t type, uint8_t gen, uint8_t ec_ga,
1127                              const S390FeatInit feat_init)
1128 {
1129     const S390CPUDef *def = s390_find_cpu_def(type, gen, ec_ga, NULL);
1130
1131     g_assert(def);
1132     g_assert(QTAILQ_EMPTY_RCU(&cpus));
1133
1134     /* TCG emulates some features that can usually not be enabled with
1135      * the emulated machine generation. Make sure they can be enabled
1136      * when using the QEMU model by adding them to full_feat. We have
1137      * to copy the definition to do that.
1138      */
1139     memcpy(&s390_qemu_cpu_def, def, sizeof(s390_qemu_cpu_def));
1140     bitmap_or(s390_qemu_cpu_def.full_feat, s390_qemu_cpu_def.full_feat,
1141               qemu_max_cpu_feat, S390_FEAT_MAX);
1142
1143     /* build the CPU model */
1144     s390_qemu_cpu_model.def = &s390_qemu_cpu_def;
1145     bitmap_zero(s390_qemu_cpu_model.features, S390_FEAT_MAX);
1146     s390_init_feat_bitmap(feat_init, s390_qemu_cpu_model.features);
1147 }
1148
1149 static void s390_qemu_cpu_model_initfn(Object *obj)
1150 {
1151     S390CPU *cpu = S390_CPU(obj);
1152
1153     cpu->model = g_malloc0(sizeof(*cpu->model));
1154     /* copy the CPU model so we can modify it */
1155     memcpy(cpu->model, &s390_qemu_cpu_model, sizeof(*cpu->model));
1156 }
1157
1158 static void s390_max_cpu_model_initfn(Object *obj)
1159 {
1160     const S390CPUModel *max_model;
1161     S390CPU *cpu = S390_CPU(obj);
1162     Error *local_err = NULL;
1163
1164     if (kvm_enabled() && !kvm_s390_cpu_models_supported()) {
1165         /* "max" and "host" always work, even without CPU model support */
1166         return;
1167     }
1168
1169     max_model = get_max_cpu_model(&local_err);
1170     if (local_err) {
1171         /* we expect errors only under KVM, when actually querying the kernel */
1172         g_assert(kvm_enabled());
1173         error_report_err(local_err);
1174         /* fallback to unsupported CPU models */
1175         return;
1176     }
1177
1178     cpu->model = g_new(S390CPUModel, 1);
1179     /* copy the CPU model so we can modify it */
1180     memcpy(cpu->model, max_model, sizeof(*cpu->model));
1181 }
1182
1183 static void s390_cpu_model_finalize(Object *obj)
1184 {
1185     S390CPU *cpu = S390_CPU(obj);
1186
1187     g_free(cpu->model);
1188     cpu->model = NULL;
1189 }
1190
1191 static bool get_is_migration_safe(Object *obj, Error **errp)
1192 {
1193     return S390_CPU_GET_CLASS(obj)->is_migration_safe;
1194 }
1195
1196 static bool get_is_static(Object *obj, Error **errp)
1197 {
1198     return S390_CPU_GET_CLASS(obj)->is_static;
1199 }
1200
1201 static char *get_description(Object *obj, Error **errp)
1202 {
1203     return g_strdup(S390_CPU_GET_CLASS(obj)->desc);
1204 }
1205
1206 void s390_cpu_model_class_register_props(ObjectClass *oc)
1207 {
1208     object_class_property_add_bool(oc, "migration-safe", get_is_migration_safe,
1209                                    NULL, NULL);
1210     object_class_property_add_bool(oc, "static", get_is_static,
1211                                    NULL, NULL);
1212     object_class_property_add_str(oc, "description", get_description, NULL,
1213                                   NULL);
1214 }
1215
1216 #ifdef CONFIG_KVM
1217 static void s390_host_cpu_model_class_init(ObjectClass *oc, void *data)
1218 {
1219     S390CPUClass *xcc = S390_CPU_CLASS(oc);
1220
1221     xcc->kvm_required = true;
1222     xcc->desc = "KVM only: All recognized features";
1223 }
1224 #endif
1225
1226 static void s390_base_cpu_model_class_init(ObjectClass *oc, void *data)
1227 {
1228     S390CPUClass *xcc = S390_CPU_CLASS(oc);
1229
1230     /* all base models are migration safe */
1231     xcc->cpu_def = (const S390CPUDef *) data;
1232     xcc->is_migration_safe = true;
1233     xcc->is_static = true;
1234     xcc->desc = xcc->cpu_def->desc;
1235 }
1236
1237 static void s390_cpu_model_class_init(ObjectClass *oc, void *data)
1238 {
1239     S390CPUClass *xcc = S390_CPU_CLASS(oc);
1240
1241     /* model that can change between QEMU versions */
1242     xcc->cpu_def = (const S390CPUDef *) data;
1243     xcc->is_migration_safe = true;
1244     xcc->desc = xcc->cpu_def->desc;
1245 }
1246
1247 static void s390_qemu_cpu_model_class_init(ObjectClass *oc, void *data)
1248 {
1249     S390CPUClass *xcc = S390_CPU_CLASS(oc);
1250
1251     xcc->is_migration_safe = true;
1252     xcc->desc = g_strdup_printf("QEMU Virtual CPU version %s",
1253                                 qemu_hw_version());
1254 }
1255
1256 static void s390_max_cpu_model_class_init(ObjectClass *oc, void *data)
1257 {
1258     S390CPUClass *xcc = S390_CPU_CLASS(oc);
1259
1260     /*
1261      * The "max" model is neither static nor migration safe. Under KVM
1262      * it represents the "host" model. Under TCG it represents some kind of
1263      * "qemu" CPU model without compat handling and maybe with some additional
1264      * CPU features that are not yet unlocked in the "qemu" model.
1265      */
1266     xcc->desc =
1267         "Enables all features supported by the accelerator in the current host";
1268 }
1269
1270 /* Generate type name for a cpu model. Caller has to free the string. */
1271 static char *s390_cpu_type_name(const char *model_name)
1272 {
1273     return g_strdup_printf(S390_CPU_TYPE_NAME("%s"), model_name);
1274 }
1275
1276 /* Generate type name for a base cpu model. Caller has to free the string. */
1277 static char *s390_base_cpu_type_name(const char *model_name)
1278 {
1279     return g_strdup_printf(S390_CPU_TYPE_NAME("%s-base"), model_name);
1280 }
1281
1282 ObjectClass *s390_cpu_class_by_name(const char *name)
1283 {
1284     char *typename = s390_cpu_type_name(name);
1285     ObjectClass *oc;
1286
1287     oc = object_class_by_name(typename);
1288     g_free(typename);
1289     return oc;
1290 }
1291
1292 static const TypeInfo qemu_s390_cpu_type_info = {
1293     .name = S390_CPU_TYPE_NAME("qemu"),
1294     .parent = TYPE_S390_CPU,
1295     .instance_init = s390_qemu_cpu_model_initfn,
1296     .instance_finalize = s390_cpu_model_finalize,
1297     .class_init = s390_qemu_cpu_model_class_init,
1298 };
1299
1300 static const TypeInfo max_s390_cpu_type_info = {
1301     .name = S390_CPU_TYPE_NAME("max"),
1302     .parent = TYPE_S390_CPU,
1303     .instance_init = s390_max_cpu_model_initfn,
1304     .instance_finalize = s390_cpu_model_finalize,
1305     .class_init = s390_max_cpu_model_class_init,
1306 };
1307
1308 #ifdef CONFIG_KVM
1309 static const TypeInfo host_s390_cpu_type_info = {
1310     .name = S390_CPU_TYPE_NAME("host"),
1311     .parent = S390_CPU_TYPE_NAME("max"),
1312     .class_init = s390_host_cpu_model_class_init,
1313 };
1314 #endif
1315
1316 static void init_ignored_base_feat(void)
1317 {
1318     static const int feats[] = {
1319          /* MSA subfunctions that could not be available on certain machines */
1320          S390_FEAT_KMAC_DEA,
1321          S390_FEAT_KMAC_TDEA_128,
1322          S390_FEAT_KMAC_TDEA_192,
1323          S390_FEAT_KMC_DEA,
1324          S390_FEAT_KMC_TDEA_128,
1325          S390_FEAT_KMC_TDEA_192,
1326          S390_FEAT_KM_DEA,
1327          S390_FEAT_KM_TDEA_128,
1328          S390_FEAT_KM_TDEA_192,
1329          S390_FEAT_KIMD_SHA_1,
1330          S390_FEAT_KLMD_SHA_1,
1331          /* CSSKE is deprecated on newer generations */
1332          S390_FEAT_CONDITIONAL_SSKE,
1333     };
1334     int i;
1335
1336     for (i = 0; i < ARRAY_SIZE(feats); i++) {
1337         set_bit(feats[i], ignored_base_feat);
1338     }
1339 }
1340
1341 static void register_types(void)
1342 {
1343     static const S390FeatInit qemu_latest_init = { S390_FEAT_LIST_QEMU_LATEST };
1344     int i;
1345
1346     init_ignored_base_feat();
1347
1348     /* init all bitmaps from gnerated data initially */
1349     s390_init_feat_bitmap(qemu_max_cpu_feat_init, qemu_max_cpu_feat);
1350     for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
1351         s390_init_feat_bitmap(s390_cpu_defs[i].base_init,
1352                               s390_cpu_defs[i].base_feat);
1353         s390_init_feat_bitmap(s390_cpu_defs[i].default_init,
1354                               s390_cpu_defs[i].default_feat);
1355         s390_init_feat_bitmap(s390_cpu_defs[i].full_init,
1356                               s390_cpu_defs[i].full_feat);
1357     }
1358
1359     /* initialize the qemu model with latest definition */
1360     s390_set_qemu_cpu_model(QEMU_MAX_CPU_TYPE, QEMU_MAX_CPU_GEN,
1361                             QEMU_MAX_CPU_EC_GA, qemu_latest_init);
1362
1363     for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
1364         char *base_name = s390_base_cpu_type_name(s390_cpu_defs[i].name);
1365         TypeInfo ti_base = {
1366             .name = base_name,
1367             .parent = TYPE_S390_CPU,
1368             .instance_init = s390_cpu_model_initfn,
1369             .instance_finalize = s390_cpu_model_finalize,
1370             .class_init = s390_base_cpu_model_class_init,
1371             .class_data = (void *) &s390_cpu_defs[i],
1372         };
1373         char *name = s390_cpu_type_name(s390_cpu_defs[i].name);
1374         TypeInfo ti = {
1375             .name = name,
1376             .parent = TYPE_S390_CPU,
1377             .instance_init = s390_cpu_model_initfn,
1378             .instance_finalize = s390_cpu_model_finalize,
1379             .class_init = s390_cpu_model_class_init,
1380             .class_data = (void *) &s390_cpu_defs[i],
1381         };
1382
1383         type_register_static(&ti_base);
1384         type_register_static(&ti);
1385         g_free(base_name);
1386         g_free(name);
1387     }
1388
1389     type_register_static(&qemu_s390_cpu_type_info);
1390     type_register_static(&max_s390_cpu_type_info);
1391 #ifdef CONFIG_KVM
1392     type_register_static(&host_s390_cpu_type_info);
1393 #endif
1394 }
1395
1396 type_init(register_types)