| /* |
| * CPU models for s390x |
| * |
| * Copyright 2016 IBM Corp. |
| * |
| * Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or (at |
| * your option) any later version. See the COPYING file in the top-level |
| * directory. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "cpu.h" |
| #include "gen-features.h" |
| #include "qapi/error.h" |
| #include "qapi/visitor.h" |
| #include "qemu/error-report.h" |
| #include "qapi/qmp/qerror.h" |
| #include "qapi/qobject-input-visitor.h" |
| #include "qapi/qmp/qbool.h" |
| #ifndef CONFIG_USER_ONLY |
| #include "sysemu/arch_init.h" |
| #endif |
| |
| #define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \ |
| { \ |
| .name = _name, \ |
| .type = _type, \ |
| .gen = _gen, \ |
| .ec_ga = _ec_ga, \ |
| .mha_pow = _mha_pow, \ |
| .hmfai = _hmfai, \ |
| .desc = _desc, \ |
| .base_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _BASE }, \ |
| .default_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _DEFAULT }, \ |
| .full_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _FULL }, \ |
| } |
| |
| /* |
| * CPU definiton list in order of release. For now, base features of a |
| * following release are always a subset of base features of the previous |
| * release. Same is correct for the other feature sets. |
| * A BC release always follows the corresponding EC release. |
| */ |
| static S390CPUDef s390_cpu_defs[] = { |
| CPUDEF_INIT(0x2064, 7, 1, 38, 0x00000000U, "z900", "IBM zSeries 900 GA1"), |
| CPUDEF_INIT(0x2064, 7, 2, 38, 0x00000000U, "z900.2", "IBM zSeries 900 GA2"), |
| CPUDEF_INIT(0x2064, 7, 3, 38, 0x00000000U, "z900.3", "IBM zSeries 900 GA3"), |
| CPUDEF_INIT(0x2066, 7, 3, 38, 0x00000000U, "z800", "IBM zSeries 800 GA1"), |
| CPUDEF_INIT(0x2084, 8, 1, 38, 0x00000000U, "z990", "IBM zSeries 990 GA1"), |
| CPUDEF_INIT(0x2084, 8, 2, 38, 0x00000000U, "z990.2", "IBM zSeries 990 GA2"), |
| CPUDEF_INIT(0x2084, 8, 3, 38, 0x00000000U, "z990.3", "IBM zSeries 990 GA3"), |
| CPUDEF_INIT(0x2086, 8, 3, 38, 0x00000000U, "z890", "IBM zSeries 880 GA1"), |
| CPUDEF_INIT(0x2084, 8, 4, 38, 0x00000000U, "z990.4", "IBM zSeries 990 GA4"), |
| CPUDEF_INIT(0x2086, 8, 4, 38, 0x00000000U, "z890.2", "IBM zSeries 880 GA2"), |
| CPUDEF_INIT(0x2084, 8, 5, 38, 0x00000000U, "z990.5", "IBM zSeries 990 GA5"), |
| CPUDEF_INIT(0x2086, 8, 5, 38, 0x00000000U, "z890.3", "IBM zSeries 880 GA3"), |
| CPUDEF_INIT(0x2094, 9, 1, 40, 0x00000000U, "z9EC", "IBM System z9 EC GA1"), |
| CPUDEF_INIT(0x2094, 9, 2, 40, 0x00000000U, "z9EC.2", "IBM System z9 EC GA2"), |
| CPUDEF_INIT(0x2096, 9, 2, 40, 0x00000000U, "z9BC", "IBM System z9 BC GA1"), |
| CPUDEF_INIT(0x2094, 9, 3, 40, 0x00000000U, "z9EC.3", "IBM System z9 EC GA3"), |
| CPUDEF_INIT(0x2096, 9, 3, 40, 0x00000000U, "z9BC.2", "IBM System z9 BC GA2"), |
| CPUDEF_INIT(0x2097, 10, 1, 43, 0x00000000U, "z10EC", "IBM System z10 EC GA1"), |
| CPUDEF_INIT(0x2097, 10, 2, 43, 0x00000000U, "z10EC.2", "IBM System z10 EC GA2"), |
| CPUDEF_INIT(0x2098, 10, 2, 43, 0x00000000U, "z10BC", "IBM System z10 BC GA1"), |
| CPUDEF_INIT(0x2097, 10, 3, 43, 0x00000000U, "z10EC.3", "IBM System z10 EC GA3"), |
| CPUDEF_INIT(0x2098, 10, 3, 43, 0x00000000U, "z10BC.2", "IBM System z10 BC GA2"), |
| CPUDEF_INIT(0x2817, 11, 1, 44, 0x08000000U, "z196", "IBM zEnterprise 196 GA1"), |
| CPUDEF_INIT(0x2817, 11, 2, 44, 0x08000000U, "z196.2", "IBM zEnterprise 196 GA2"), |
| CPUDEF_INIT(0x2818, 11, 2, 44, 0x08000000U, "z114", "IBM zEnterprise 114 GA1"), |
| CPUDEF_INIT(0x2827, 12, 1, 44, 0x08000000U, "zEC12", "IBM zEnterprise EC12 GA1"), |
| CPUDEF_INIT(0x2827, 12, 2, 44, 0x08000000U, "zEC12.2", "IBM zEnterprise EC12 GA2"), |
| CPUDEF_INIT(0x2828, 12, 2, 44, 0x08000000U, "zBC12", "IBM zEnterprise BC12 GA1"), |
| CPUDEF_INIT(0x2964, 13, 1, 47, 0x08000000U, "z13", "IBM z13 GA1"), |
| CPUDEF_INIT(0x2964, 13, 2, 47, 0x08000000U, "z13.2", "IBM z13 GA2"), |
| CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"), |
| }; |
| |
| uint32_t s390_get_hmfai(void) |
| { |
| static S390CPU *cpu; |
| |
| if (!cpu) { |
| cpu = S390_CPU(qemu_get_cpu(0)); |
| } |
| |
| if (!cpu || !cpu->model) { |
| return 0; |
| } |
| return cpu->model->def->hmfai; |
| } |
| |
| uint8_t s390_get_mha_pow(void) |
| { |
| static S390CPU *cpu; |
| |
| if (!cpu) { |
| cpu = S390_CPU(qemu_get_cpu(0)); |
| } |
| |
| if (!cpu || !cpu->model) { |
| return 0; |
| } |
| return cpu->model->def->mha_pow; |
| } |
| |
| uint32_t s390_get_ibc_val(void) |
| { |
| uint16_t unblocked_ibc, lowest_ibc; |
| static S390CPU *cpu; |
| |
| if (!cpu) { |
| cpu = S390_CPU(qemu_get_cpu(0)); |
| } |
| |
| if (!cpu || !cpu->model) { |
| return 0; |
| } |
| unblocked_ibc = s390_ibc_from_cpu_model(cpu->model); |
| lowest_ibc = cpu->model->lowest_ibc; |
| /* the lowest_ibc always has to be <= unblocked_ibc */ |
| if (!lowest_ibc || lowest_ibc > unblocked_ibc) { |
| return 0; |
| } |
| return ((uint32_t) lowest_ibc << 16) | unblocked_ibc; |
| } |
| |
| void s390_get_feat_block(S390FeatType type, uint8_t *data) |
| { |
| static S390CPU *cpu; |
| |
| if (!cpu) { |
| cpu = S390_CPU(qemu_get_cpu(0)); |
| } |
| |
| if (!cpu || !cpu->model) { |
| return; |
| } |
| s390_fill_feat_block(cpu->model->features, type, data); |
| } |
| |
| bool s390_has_feat(S390Feat feat) |
| { |
| static S390CPU *cpu; |
| |
| if (!cpu) { |
| cpu = S390_CPU(qemu_get_cpu(0)); |
| } |
| |
| if (!cpu || !cpu->model) { |
| #ifdef CONFIG_KVM |
| if (kvm_enabled()) { |
| if (feat == S390_FEAT_VECTOR) { |
| return kvm_check_extension(kvm_state, |
| KVM_CAP_S390_VECTOR_REGISTERS); |
| } |
| if (feat == S390_FEAT_RUNTIME_INSTRUMENTATION) { |
| return kvm_s390_get_ri(); |
| } |
| if (feat == S390_FEAT_MSA_EXT_3) { |
| return true; |
| } |
| } |
| #endif |
| return 0; |
| } |
| return test_bit(feat, cpu->model->features); |
| } |
| |
| uint8_t s390_get_gen_for_cpu_type(uint16_t type) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { |
| if (s390_cpu_defs[i].type == type) { |
| return s390_cpu_defs[i].gen; |
| } |
| } |
| return 0; |
| } |
| |
| const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga, |
| S390FeatBitmap features) |
| { |
| const S390CPUDef *last_compatible = NULL; |
| const S390CPUDef *matching_cpu_type = NULL; |
| int i; |
| |
| if (!gen) { |
| ec_ga = 0; |
| } |
| if (!gen && type) { |
| gen = s390_get_gen_for_cpu_type(type); |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { |
| const S390CPUDef *def = &s390_cpu_defs[i]; |
| S390FeatBitmap missing; |
| |
| /* don't even try newer generations if we know the generation */ |
| if (gen) { |
| if (def->gen > gen) { |
| break; |
| } else if (def->gen == gen && ec_ga && def->ec_ga > ec_ga) { |
| break; |
| } |
| } |
| |
| if (features) { |
| /* see if the model satisfies the minimum features */ |
| bitmap_andnot(missing, def->base_feat, features, S390_FEAT_MAX); |
| if (!bitmap_empty(missing, S390_FEAT_MAX)) { |
| break; |
| } |
| } |
| |
| /* stop the search if we found the exact model */ |
| if (def->type == type && def->ec_ga == ec_ga) { |
| return def; |
| } |
| /* remember if we've at least seen one with the same cpu type */ |
| if (def->type == type) { |
| matching_cpu_type = def; |
| } |
| last_compatible = def; |
| } |
| /* prefer the model with the same cpu type, esp. don't take the BC for EC */ |
| if (matching_cpu_type) { |
| return matching_cpu_type; |
| } |
| return last_compatible; |
| } |
| |
| struct S390PrintCpuListInfo { |
| FILE *f; |
| fprintf_function print; |
| }; |
| |
| static void print_cpu_model_list(ObjectClass *klass, void *opaque) |
| { |
| struct S390PrintCpuListInfo *info = opaque; |
| S390CPUClass *scc = S390_CPU_CLASS(klass); |
| char *name = g_strdup(object_class_get_name(klass)); |
| const char *details = ""; |
| |
| if (scc->is_static) { |
| details = "(static, migration-safe)"; |
| } else if (scc->is_migration_safe) { |
| details = "(migration-safe)"; |
| } |
| |
| /* strip off the -s390-cpu */ |
| g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0; |
| (*info->print)(info->f, "s390 %-15s %-35s %s\n", name, scc->desc, |
| details); |
| g_free(name); |
| } |
| |
| void s390_cpu_list(FILE *f, fprintf_function print) |
| { |
| struct S390PrintCpuListInfo info = { |
| .f = f, |
| .print = print, |
| }; |
| S390FeatGroup group; |
| S390Feat feat; |
| |
| object_class_foreach(print_cpu_model_list, TYPE_S390_CPU, false, &info); |
| |
| (*print)(f, "\nRecognized feature flags:\n"); |
| for (feat = 0; feat < S390_FEAT_MAX; feat++) { |
| const S390FeatDef *def = s390_feat_def(feat); |
| |
| (*print)(f, "%-20s %-50s\n", def->name, def->desc); |
| } |
| |
| (*print)(f, "\nRecognized feature groups:\n"); |
| for (group = 0; group < S390_FEAT_GROUP_MAX; group++) { |
| const S390FeatGroupDef *def = s390_feat_group_def(group); |
| |
| (*print)(f, "%-20s %-50s\n", def->name, def->desc); |
| } |
| } |
| |
| static S390CPUModel *get_max_cpu_model(Error **errp); |
| |
| #ifndef CONFIG_USER_ONLY |
| static void list_add_feat(const char *name, void *opaque); |
| |
| static void check_unavailable_features(const S390CPUModel *max_model, |
| const S390CPUModel *model, |
| strList **unavailable) |
| { |
| S390FeatBitmap missing; |
| |
| /* check general model compatibility */ |
| if (max_model->def->gen < model->def->gen || |
| (max_model->def->gen == model->def->gen && |
| max_model->def->ec_ga < model->def->ec_ga)) { |
| list_add_feat("type", unavailable); |
| } |
| |
| /* detect missing features if any to properly report them */ |
| bitmap_andnot(missing, model->features, max_model->features, |
| S390_FEAT_MAX); |
| if (!bitmap_empty(missing, S390_FEAT_MAX)) { |
| s390_feat_bitmap_to_ascii(missing, unavailable, list_add_feat); |
| } |
| } |
| |
| struct CpuDefinitionInfoListData { |
| CpuDefinitionInfoList *list; |
| S390CPUModel *model; |
| }; |
| |
| static void create_cpu_model_list(ObjectClass *klass, void *opaque) |
| { |
| struct CpuDefinitionInfoListData *cpu_list_data = opaque; |
| CpuDefinitionInfoList **cpu_list = &cpu_list_data->list; |
| CpuDefinitionInfoList *entry; |
| CpuDefinitionInfo *info; |
| char *name = g_strdup(object_class_get_name(klass)); |
| S390CPUClass *scc = S390_CPU_CLASS(klass); |
| |
| /* strip off the -s390-cpu */ |
| g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0; |
| info = g_malloc0(sizeof(*info)); |
| info->name = name; |
| info->has_migration_safe = true; |
| info->migration_safe = scc->is_migration_safe; |
| info->q_static = scc->is_static; |
| info->q_typename = g_strdup(object_class_get_name(klass)); |
| /* check for unavailable features */ |
| if (cpu_list_data->model) { |
| Object *obj; |
| S390CPU *sc; |
| obj = object_new(object_class_get_name(klass)); |
| sc = S390_CPU(obj); |
| if (sc->model) { |
| info->has_unavailable_features = true; |
| check_unavailable_features(cpu_list_data->model, sc->model, |
| &info->unavailable_features); |
| } |
| object_unref(obj); |
| } |
| |
| entry = g_malloc0(sizeof(*entry)); |
| entry->value = info; |
| entry->next = *cpu_list; |
| *cpu_list = entry; |
| } |
| |
| CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp) |
| { |
| struct CpuDefinitionInfoListData list_data = { |
| .list = NULL, |
| }; |
| |
| list_data.model = get_max_cpu_model(errp); |
| if (*errp) { |
| error_free(*errp); |
| *errp = NULL; |
| } |
| |
| object_class_foreach(create_cpu_model_list, TYPE_S390_CPU, false, |
| &list_data); |
| |
| return list_data.list; |
| } |
| |
| static void cpu_model_from_info(S390CPUModel *model, const CpuModelInfo *info, |
| Error **errp) |
| { |
| const QDict *qdict = NULL; |
| const QDictEntry *e; |
| Visitor *visitor; |
| ObjectClass *oc; |
| S390CPU *cpu; |
| Object *obj; |
| |
| if (info->props) { |
| qdict = qobject_to_qdict(info->props); |
| if (!qdict) { |
| error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict"); |
| return; |
| } |
| } |
| |
| oc = cpu_class_by_name(TYPE_S390_CPU, info->name); |
| if (!oc) { |
| error_setg(errp, "The CPU definition \'%s\' is unknown.", info->name); |
| return; |
| } |
| if (S390_CPU_CLASS(oc)->kvm_required && !kvm_enabled()) { |
| error_setg(errp, "The CPU definition '%s' requires KVM", info->name); |
| return; |
| } |
| obj = object_new(object_class_get_name(oc)); |
| cpu = S390_CPU(obj); |
| |
| if (!cpu->model) { |
| error_setg(errp, "Details about the host CPU model are not available, " |
| "it cannot be used."); |
| object_unref(obj); |
| return; |
| } |
| |
| if (qdict) { |
| visitor = qobject_input_visitor_new(info->props); |
| visit_start_struct(visitor, NULL, NULL, 0, errp); |
| if (*errp) { |
| object_unref(obj); |
| return; |
| } |
| for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) { |
| object_property_set(obj, visitor, e->key, errp); |
| if (*errp) { |
| break; |
| } |
| } |
| if (!*errp) { |
| visit_check_struct(visitor, errp); |
| } |
| visit_end_struct(visitor, NULL); |
| visit_free(visitor); |
| if (*errp) { |
| object_unref(obj); |
| return; |
| } |
| } |
| |
| /* copy the model and throw the cpu away */ |
| memcpy(model, cpu->model, sizeof(*model)); |
| object_unref(obj); |
| } |
| |
| static void qdict_add_disabled_feat(const char *name, void *opaque) |
| { |
| qdict_put_bool(opaque, name, false); |
| } |
| |
| static void qdict_add_enabled_feat(const char *name, void *opaque) |
| { |
| qdict_put_bool(opaque, name, true); |
| } |
| |
| /* convert S390CPUDef into a static CpuModelInfo */ |
| static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model, |
| bool delta_changes) |
| { |
| QDict *qdict = qdict_new(); |
| S390FeatBitmap bitmap; |
| |
| /* always fallback to the static base model */ |
| info->name = g_strdup_printf("%s-base", model->def->name); |
| |
| if (delta_changes) { |
| /* features deleted from the base feature set */ |
| bitmap_andnot(bitmap, model->def->base_feat, model->features, |
| S390_FEAT_MAX); |
| if (!bitmap_empty(bitmap, S390_FEAT_MAX)) { |
| s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat); |
| } |
| |
| /* features added to the base feature set */ |
| bitmap_andnot(bitmap, model->features, model->def->base_feat, |
| S390_FEAT_MAX); |
| if (!bitmap_empty(bitmap, S390_FEAT_MAX)) { |
| s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_enabled_feat); |
| } |
| } else { |
| /* expand all features */ |
| s390_feat_bitmap_to_ascii(model->features, qdict, |
| qdict_add_enabled_feat); |
| bitmap_complement(bitmap, model->features, S390_FEAT_MAX); |
| s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat); |
| } |
| |
| if (!qdict_size(qdict)) { |
| QDECREF(qdict); |
| } else { |
| info->props = QOBJECT(qdict); |
| info->has_props = true; |
| } |
| } |
| |
| CpuModelExpansionInfo *arch_query_cpu_model_expansion(CpuModelExpansionType type, |
| CpuModelInfo *model, |
| Error **errp) |
| { |
| CpuModelExpansionInfo *expansion_info = NULL; |
| S390CPUModel s390_model; |
| bool delta_changes = false; |
| |
| /* convert it to our internal representation */ |
| cpu_model_from_info(&s390_model, model, errp); |
| if (*errp) { |
| return NULL; |
| } |
| |
| if (type == CPU_MODEL_EXPANSION_TYPE_STATIC) { |
| delta_changes = true; |
| } else if (type != CPU_MODEL_EXPANSION_TYPE_FULL) { |
| error_setg(errp, "The requested expansion type is not supported."); |
| return NULL; |
| } |
| |
| /* convert it back to a static representation */ |
| expansion_info = g_malloc0(sizeof(*expansion_info)); |
| expansion_info->model = g_malloc0(sizeof(*expansion_info->model)); |
| cpu_info_from_model(expansion_info->model, &s390_model, delta_changes); |
| return expansion_info; |
| } |
| |
| static void list_add_feat(const char *name, void *opaque) |
| { |
| strList **last = (strList **) opaque; |
| strList *entry; |
| |
| entry = g_malloc0(sizeof(*entry)); |
| entry->value = g_strdup(name); |
| entry->next = *last; |
| *last = entry; |
| } |
| |
| CpuModelCompareInfo *arch_query_cpu_model_comparison(CpuModelInfo *infoa, |
| CpuModelInfo *infob, |
| Error **errp) |
| { |
| CpuModelCompareResult feat_result, gen_result; |
| CpuModelCompareInfo *compare_info; |
| S390FeatBitmap missing, added; |
| S390CPUModel modela, modelb; |
| |
| /* convert both models to our internal representation */ |
| cpu_model_from_info(&modela, infoa, errp); |
| if (*errp) { |
| return NULL; |
| } |
| cpu_model_from_info(&modelb, infob, errp); |
| if (*errp) { |
| return NULL; |
| } |
| compare_info = g_malloc0(sizeof(*compare_info)); |
| |
| /* check the cpu generation and ga level */ |
| if (modela.def->gen == modelb.def->gen) { |
| if (modela.def->ec_ga == modelb.def->ec_ga) { |
| /* ec and corresponding bc are identical */ |
| gen_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL; |
| } else if (modela.def->ec_ga < modelb.def->ec_ga) { |
| gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET; |
| } else { |
| gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET; |
| } |
| } else if (modela.def->gen < modelb.def->gen) { |
| gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET; |
| } else { |
| gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET; |
| } |
| if (gen_result != CPU_MODEL_COMPARE_RESULT_IDENTICAL) { |
| /* both models cannot be made identical */ |
| list_add_feat("type", &compare_info->responsible_properties); |
| } |
| |
| /* check the feature set */ |
| if (bitmap_equal(modela.features, modelb.features, S390_FEAT_MAX)) { |
| feat_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL; |
| } else { |
| bitmap_andnot(missing, modela.features, modelb.features, S390_FEAT_MAX); |
| s390_feat_bitmap_to_ascii(missing, |
| &compare_info->responsible_properties, |
| list_add_feat); |
| bitmap_andnot(added, modelb.features, modela.features, S390_FEAT_MAX); |
| s390_feat_bitmap_to_ascii(added, &compare_info->responsible_properties, |
| list_add_feat); |
| if (bitmap_empty(missing, S390_FEAT_MAX)) { |
| feat_result = CPU_MODEL_COMPARE_RESULT_SUBSET; |
| } else if (bitmap_empty(added, S390_FEAT_MAX)) { |
| feat_result = CPU_MODEL_COMPARE_RESULT_SUPERSET; |
| } else { |
| feat_result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE; |
| } |
| } |
| |
| /* combine the results */ |
| if (gen_result == feat_result) { |
| compare_info->result = gen_result; |
| } else if (feat_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) { |
| compare_info->result = gen_result; |
| } else if (gen_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) { |
| compare_info->result = feat_result; |
| } else { |
| compare_info->result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE; |
| } |
| return compare_info; |
| } |
| |
| CpuModelBaselineInfo *arch_query_cpu_model_baseline(CpuModelInfo *infoa, |
| CpuModelInfo *infob, |
| Error **errp) |
| { |
| CpuModelBaselineInfo *baseline_info; |
| S390CPUModel modela, modelb, model; |
| uint16_t cpu_type; |
| uint8_t max_gen_ga; |
| uint8_t max_gen; |
| |
| /* convert both models to our internal representation */ |
| cpu_model_from_info(&modela, infoa, errp); |
| if (*errp) { |
| return NULL; |
| } |
| |
| cpu_model_from_info(&modelb, infob, errp); |
| if (*errp) { |
| return NULL; |
| } |
| |
| /* features both models support */ |
| bitmap_and(model.features, modela.features, modelb.features, S390_FEAT_MAX); |
| |
| /* detect the maximum model not regarding features */ |
| if (modela.def->gen == modelb.def->gen) { |
| if (modela.def->type == modelb.def->type) { |
| cpu_type = modela.def->type; |
| } else { |
| cpu_type = 0; |
| } |
| max_gen = modela.def->gen; |
| max_gen_ga = MIN(modela.def->ec_ga, modelb.def->ec_ga); |
| } else if (modela.def->gen > modelb.def->gen) { |
| cpu_type = modelb.def->type; |
| max_gen = modelb.def->gen; |
| max_gen_ga = modelb.def->ec_ga; |
| } else { |
| cpu_type = modela.def->type; |
| max_gen = modela.def->gen; |
| max_gen_ga = modela.def->ec_ga; |
| } |
| |
| model.def = s390_find_cpu_def(cpu_type, max_gen, max_gen_ga, |
| model.features); |
| /* strip off features not part of the max model */ |
| bitmap_and(model.features, model.features, model.def->full_feat, |
| S390_FEAT_MAX); |
| |
| baseline_info = g_malloc0(sizeof(*baseline_info)); |
| baseline_info->model = g_malloc0(sizeof(*baseline_info->model)); |
| cpu_info_from_model(baseline_info->model, &model, true); |
| return baseline_info; |
| } |
| #endif |
| |
| static void check_consistency(const S390CPUModel *model) |
| { |
| static int dep[][2] = { |
| { S390_FEAT_IPTE_RANGE, S390_FEAT_DAT_ENH }, |
| { S390_FEAT_IDTE_SEGMENT, S390_FEAT_DAT_ENH }, |
| { S390_FEAT_IDTE_REGION, S390_FEAT_DAT_ENH }, |
| { S390_FEAT_IDTE_REGION, S390_FEAT_IDTE_SEGMENT }, |
| { S390_FEAT_LOCAL_TLB_CLEARING, S390_FEAT_DAT_ENH}, |
| { S390_FEAT_LONG_DISPLACEMENT_FAST, S390_FEAT_LONG_DISPLACEMENT }, |
| { S390_FEAT_DFP_FAST, S390_FEAT_DFP }, |
| { S390_FEAT_TRANSACTIONAL_EXE, S390_FEAT_STFLE_49 }, |
| { S390_FEAT_EDAT_2, S390_FEAT_EDAT}, |
| { S390_FEAT_MSA_EXT_5, S390_FEAT_KIMD_SHA_512 }, |
| { S390_FEAT_MSA_EXT_5, S390_FEAT_KLMD_SHA_512 }, |
| { S390_FEAT_MSA_EXT_4, S390_FEAT_MSA_EXT_3 }, |
| { S390_FEAT_SIE_CMMA, S390_FEAT_CMM }, |
| { S390_FEAT_SIE_CMMA, S390_FEAT_SIE_GSLS }, |
| { S390_FEAT_SIE_PFMFI, S390_FEAT_EDAT }, |
| }; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(dep); i++) { |
| if (test_bit(dep[i][0], model->features) && |
| !test_bit(dep[i][1], model->features)) { |
| error_report("Warning: \'%s\' requires \'%s\'.", |
| s390_feat_def(dep[i][0])->name, |
| s390_feat_def(dep[i][1])->name); |
| } |
| } |
| } |
| |
| static void error_prepend_missing_feat(const char *name, void *opaque) |
| { |
| error_prepend((Error **) opaque, "%s ", name); |
| } |
| |
| static void check_compatibility(const S390CPUModel *max_model, |
| const S390CPUModel *model, Error **errp) |
| { |
| S390FeatBitmap missing; |
| |
| if (model->def->gen > max_model->def->gen) { |
| error_setg(errp, "Selected CPU generation is too new. Maximum " |
| "supported model in the configuration: \'%s\'", |
| max_model->def->name); |
| return; |
| } else if (model->def->gen == max_model->def->gen && |
| model->def->ec_ga > max_model->def->ec_ga) { |
| error_setg(errp, "Selected CPU GA level is too new. Maximum " |
| "supported model in the configuration: \'%s\'", |
| max_model->def->name); |
| return; |
| } |
| |
| /* detect the missing features to properly report them */ |
| bitmap_andnot(missing, model->features, max_model->features, S390_FEAT_MAX); |
| if (bitmap_empty(missing, S390_FEAT_MAX)) { |
| return; |
| } |
| |
| error_setg(errp, " "); |
| s390_feat_bitmap_to_ascii(missing, errp, error_prepend_missing_feat); |
| error_prepend(errp, "Some features requested in the CPU model are not " |
| "available in the configuration: "); |
| } |
| |
| /** |
| * The base TCG CPU model "qemu" is based on the z900. However, we already |
| * can also emulate some additional features of later CPU generations, so |
| * we add these additional feature bits here. |
| */ |
| static void add_qemu_cpu_model_features(S390FeatBitmap fbm) |
| { |
| static const int feats[] = { |
| S390_FEAT_DAT_ENH, |
| S390_FEAT_STFLE, |
| S390_FEAT_EXTENDED_IMMEDIATE, |
| S390_FEAT_EXTENDED_TRANSLATION_2, |
| S390_FEAT_LONG_DISPLACEMENT, |
| S390_FEAT_LONG_DISPLACEMENT_FAST, |
| S390_FEAT_ETF2_ENH, |
| S390_FEAT_STORE_CLOCK_FAST, |
| S390_FEAT_MOVE_WITH_OPTIONAL_SPEC, |
| S390_FEAT_GENERAL_INSTRUCTIONS_EXT, |
| S390_FEAT_EXECUTE_EXT, |
| S390_FEAT_FLOATING_POINT_SUPPPORT_ENH, |
| S390_FEAT_STFLE_45, |
| S390_FEAT_STFLE_49, |
| S390_FEAT_LOCAL_TLB_CLEARING, |
| S390_FEAT_STFLE_53, |
| }; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(feats); i++) { |
| set_bit(feats[i], fbm); |
| } |
| } |
| |
| static S390CPUModel *get_max_cpu_model(Error **errp) |
| { |
| static S390CPUModel max_model; |
| static bool cached; |
| |
| if (cached) { |
| return &max_model; |
| } |
| |
| if (kvm_enabled()) { |
| kvm_s390_get_host_cpu_model(&max_model, errp); |
| } else { |
| /* TCG emulates a z900 (with some optional additional features) */ |
| max_model.def = &s390_cpu_defs[0]; |
| bitmap_copy(max_model.features, max_model.def->default_feat, |
| S390_FEAT_MAX); |
| add_qemu_cpu_model_features(max_model.features); |
| } |
| if (!*errp) { |
| cached = true; |
| return &max_model; |
| } |
| return NULL; |
| } |
| |
| static inline void apply_cpu_model(const S390CPUModel *model, Error **errp) |
| { |
| #ifndef CONFIG_USER_ONLY |
| static S390CPUModel applied_model; |
| static bool applied; |
| |
| /* |
| * We have the same model for all VCPUs. KVM can only be configured before |
| * any VCPUs are defined in KVM. |
| */ |
| if (applied) { |
| if (model && memcmp(&applied_model, model, sizeof(S390CPUModel))) { |
| error_setg(errp, "Mixed CPU models are not supported on s390x."); |
| } |
| return; |
| } |
| |
| if (kvm_enabled()) { |
| kvm_s390_apply_cpu_model(model, errp); |
| } |
| |
| if (!*errp) { |
| applied = true; |
| if (model) { |
| applied_model = *model; |
| } |
| } |
| #endif |
| } |
| |
| void s390_realize_cpu_model(CPUState *cs, Error **errp) |
| { |
| S390CPUClass *xcc = S390_CPU_GET_CLASS(cs); |
| S390CPU *cpu = S390_CPU(cs); |
| const S390CPUModel *max_model; |
| |
| if (xcc->kvm_required && !kvm_enabled()) { |
| error_setg(errp, "CPU definition requires KVM"); |
| return; |
| } |
| |
| if (!cpu->model) { |
| /* no host model support -> perform compatibility stuff */ |
| apply_cpu_model(NULL, errp); |
| return; |
| } |
| |
| max_model = get_max_cpu_model(errp); |
| if (*errp) { |
| error_prepend(errp, "CPU models are not available: "); |
| return; |
| } |
| |
| /* copy over properties that can vary */ |
| cpu->model->lowest_ibc = max_model->lowest_ibc; |
| cpu->model->cpu_id = max_model->cpu_id; |
| cpu->model->cpu_id_format = max_model->cpu_id_format; |
| cpu->model->cpu_ver = max_model->cpu_ver; |
| |
| check_consistency(cpu->model); |
| check_compatibility(max_model, cpu->model, errp); |
| if (*errp) { |
| return; |
| } |
| |
| apply_cpu_model(cpu->model, errp); |
| |
| cpu->env.cpuid = s390_cpuid_from_cpu_model(cpu->model); |
| if (tcg_enabled()) { |
| /* basic mode, write the cpu address into the first 4 bit of the ID */ |
| cpu->env.cpuid = deposit64(cpu->env.cpuid, 54, 4, cpu->env.cpu_num); |
| } |
| } |
| |
| static void get_feature(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| S390Feat feat = (S390Feat) opaque; |
| S390CPU *cpu = S390_CPU(obj); |
| bool value; |
| |
| if (!cpu->model) { |
| error_setg(errp, "Details about the host CPU model are not available, " |
| "features cannot be queried."); |
| return; |
| } |
| |
| value = test_bit(feat, cpu->model->features); |
| visit_type_bool(v, name, &value, errp); |
| } |
| |
| static void set_feature(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| S390Feat feat = (S390Feat) opaque; |
| DeviceState *dev = DEVICE(obj); |
| S390CPU *cpu = S390_CPU(obj); |
| bool value; |
| |
| if (dev->realized) { |
| error_setg(errp, "Attempt to set property '%s' on '%s' after " |
| "it was realized", name, object_get_typename(obj)); |
| return; |
| } else if (!cpu->model) { |
| error_setg(errp, "Details about the host CPU model are not available, " |
| "features cannot be changed."); |
| return; |
| } |
| |
| visit_type_bool(v, name, &value, errp); |
| if (*errp) { |
| return; |
| } |
| if (value) { |
| if (!test_bit(feat, cpu->model->def->full_feat)) { |
| error_setg(errp, "Feature '%s' is not available for CPU model '%s'," |
| " it was introduced with later models.", |
| name, cpu->model->def->name); |
| return; |
| } |
| set_bit(feat, cpu->model->features); |
| } else { |
| clear_bit(feat, cpu->model->features); |
| } |
| } |
| |
| static void get_feature_group(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| S390FeatGroup group = (S390FeatGroup) opaque; |
| const S390FeatGroupDef *def = s390_feat_group_def(group); |
| S390CPU *cpu = S390_CPU(obj); |
| S390FeatBitmap tmp; |
| bool value; |
| |
| if (!cpu->model) { |
| error_setg(errp, "Details about the host CPU model are not available, " |
| "features cannot be queried."); |
| return; |
| } |
| |
| /* a group is enabled if all features are enabled */ |
| bitmap_and(tmp, cpu->model->features, def->feat, S390_FEAT_MAX); |
| value = bitmap_equal(tmp, def->feat, S390_FEAT_MAX); |
| visit_type_bool(v, name, &value, errp); |
| } |
| |
| static void set_feature_group(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| S390FeatGroup group = (S390FeatGroup) opaque; |
| const S390FeatGroupDef *def = s390_feat_group_def(group); |
| DeviceState *dev = DEVICE(obj); |
| S390CPU *cpu = S390_CPU(obj); |
| bool value; |
| |
| if (dev->realized) { |
| error_setg(errp, "Attempt to set property '%s' on '%s' after " |
| "it was realized", name, object_get_typename(obj)); |
| return; |
| } else if (!cpu->model) { |
| error_setg(errp, "Details about the host CPU model are not available, " |
| "features cannot be changed."); |
| return; |
| } |
| |
| visit_type_bool(v, name, &value, errp); |
| if (*errp) { |
| return; |
| } |
| if (value) { |
| /* groups are added in one shot, so an intersect is sufficient */ |
| if (!bitmap_intersects(def->feat, cpu->model->def->full_feat, |
| S390_FEAT_MAX)) { |
| error_setg(errp, "Group '%s' is not available for CPU model '%s'," |
| " it was introduced with later models.", |
| name, cpu->model->def->name); |
| return; |
| } |
| bitmap_or(cpu->model->features, cpu->model->features, def->feat, |
| S390_FEAT_MAX); |
| } else { |
| bitmap_andnot(cpu->model->features, cpu->model->features, def->feat, |
| S390_FEAT_MAX); |
| } |
| } |
| |
| void s390_cpu_model_register_props(Object *obj) |
| { |
| S390FeatGroup group; |
| S390Feat feat; |
| |
| for (feat = 0; feat < S390_FEAT_MAX; feat++) { |
| const S390FeatDef *def = s390_feat_def(feat); |
| object_property_add(obj, def->name, "bool", get_feature, |
| set_feature, NULL, (void *) feat, NULL); |
| object_property_set_description(obj, def->name, def->desc , NULL); |
| } |
| for (group = 0; group < S390_FEAT_GROUP_MAX; group++) { |
| const S390FeatGroupDef *def = s390_feat_group_def(group); |
| object_property_add(obj, def->name, "bool", get_feature_group, |
| set_feature_group, NULL, (void *) group, NULL); |
| object_property_set_description(obj, def->name, def->desc , NULL); |
| } |
| } |
| |
| static void s390_cpu_model_initfn(Object *obj) |
| { |
| S390CPU *cpu = S390_CPU(obj); |
| S390CPUClass *xcc = S390_CPU_GET_CLASS(cpu); |
| |
| cpu->model = g_malloc0(sizeof(*cpu->model)); |
| /* copy the model, so we can modify it */ |
| cpu->model->def = xcc->cpu_def; |
| if (xcc->is_static) { |
| /* base model - features will never change */ |
| bitmap_copy(cpu->model->features, cpu->model->def->base_feat, |
| S390_FEAT_MAX); |
| } else { |
| /* latest model - features can change */ |
| bitmap_copy(cpu->model->features, |
| cpu->model->def->default_feat, S390_FEAT_MAX); |
| } |
| } |
| |
| #ifdef CONFIG_KVM |
| static void s390_host_cpu_model_initfn(Object *obj) |
| { |
| S390CPU *cpu = S390_CPU(obj); |
| Error *err = NULL; |
| |
| if (!kvm_enabled() || !kvm_s390_cpu_models_supported()) { |
| return; |
| } |
| |
| cpu->model = g_malloc0(sizeof(*cpu->model)); |
| kvm_s390_get_host_cpu_model(cpu->model, &err); |
| if (err) { |
| error_report_err(err); |
| g_free(cpu->model); |
| /* fallback to unsupported cpu models */ |
| cpu->model = NULL; |
| } |
| } |
| #endif |
| |
| static void s390_qemu_cpu_model_initfn(Object *obj) |
| { |
| static S390CPUDef s390_qemu_cpu_defs; |
| S390CPU *cpu = S390_CPU(obj); |
| |
| cpu->model = g_malloc0(sizeof(*cpu->model)); |
| /* TCG emulates a z900 (with some optional additional features) */ |
| memcpy(&s390_qemu_cpu_defs, &s390_cpu_defs[0], sizeof(s390_qemu_cpu_defs)); |
| add_qemu_cpu_model_features(s390_qemu_cpu_defs.full_feat); |
| cpu->model->def = &s390_qemu_cpu_defs; |
| bitmap_copy(cpu->model->features, cpu->model->def->default_feat, |
| S390_FEAT_MAX); |
| } |
| |
| static void s390_cpu_model_finalize(Object *obj) |
| { |
| S390CPU *cpu = S390_CPU(obj); |
| |
| g_free(cpu->model); |
| cpu->model = NULL; |
| } |
| |
| static bool get_is_migration_safe(Object *obj, Error **errp) |
| { |
| return S390_CPU_GET_CLASS(obj)->is_migration_safe; |
| } |
| |
| static bool get_is_static(Object *obj, Error **errp) |
| { |
| return S390_CPU_GET_CLASS(obj)->is_static; |
| } |
| |
| static char *get_description(Object *obj, Error **errp) |
| { |
| return g_strdup(S390_CPU_GET_CLASS(obj)->desc); |
| } |
| |
| void s390_cpu_model_class_register_props(ObjectClass *oc) |
| { |
| object_class_property_add_bool(oc, "migration-safe", get_is_migration_safe, |
| NULL, NULL); |
| object_class_property_add_bool(oc, "static", get_is_static, |
| NULL, NULL); |
| object_class_property_add_str(oc, "description", get_description, NULL, |
| NULL); |
| } |
| |
| #ifdef CONFIG_KVM |
| static void s390_host_cpu_model_class_init(ObjectClass *oc, void *data) |
| { |
| S390CPUClass *xcc = S390_CPU_CLASS(oc); |
| |
| xcc->kvm_required = true; |
| xcc->desc = "KVM only: All recognized features"; |
| } |
| #endif |
| |
| static void s390_base_cpu_model_class_init(ObjectClass *oc, void *data) |
| { |
| S390CPUClass *xcc = S390_CPU_CLASS(oc); |
| |
| /* all base models are migration safe */ |
| xcc->cpu_def = (const S390CPUDef *) data; |
| xcc->is_migration_safe = true; |
| xcc->is_static = true; |
| xcc->desc = xcc->cpu_def->desc; |
| } |
| |
| static void s390_cpu_model_class_init(ObjectClass *oc, void *data) |
| { |
| S390CPUClass *xcc = S390_CPU_CLASS(oc); |
| |
| /* model that can change between QEMU versions */ |
| xcc->cpu_def = (const S390CPUDef *) data; |
| xcc->is_migration_safe = true; |
| xcc->desc = xcc->cpu_def->desc; |
| } |
| |
| static void s390_qemu_cpu_model_class_init(ObjectClass *oc, void *data) |
| { |
| S390CPUClass *xcc = S390_CPU_CLASS(oc); |
| |
| xcc->is_migration_safe = true; |
| xcc->desc = g_strdup_printf("QEMU Virtual CPU version %s", |
| qemu_hw_version()); |
| } |
| |
| #define S390_CPU_TYPE_SUFFIX "-" TYPE_S390_CPU |
| #define S390_CPU_TYPE_NAME(name) (name S390_CPU_TYPE_SUFFIX) |
| |
| /* Generate type name for a cpu model. Caller has to free the string. */ |
| static char *s390_cpu_type_name(const char *model_name) |
| { |
| return g_strdup_printf(S390_CPU_TYPE_NAME("%s"), model_name); |
| } |
| |
| /* Generate type name for a base cpu model. Caller has to free the string. */ |
| static char *s390_base_cpu_type_name(const char *model_name) |
| { |
| return g_strdup_printf(S390_CPU_TYPE_NAME("%s-base"), model_name); |
| } |
| |
| ObjectClass *s390_cpu_class_by_name(const char *name) |
| { |
| char *typename = s390_cpu_type_name(name); |
| ObjectClass *oc; |
| |
| oc = object_class_by_name(typename); |
| g_free(typename); |
| return oc; |
| } |
| |
| static const TypeInfo qemu_s390_cpu_type_info = { |
| .name = S390_CPU_TYPE_NAME("qemu"), |
| .parent = TYPE_S390_CPU, |
| .instance_init = s390_qemu_cpu_model_initfn, |
| .instance_finalize = s390_cpu_model_finalize, |
| .class_init = s390_qemu_cpu_model_class_init, |
| }; |
| |
| #ifdef CONFIG_KVM |
| static const TypeInfo host_s390_cpu_type_info = { |
| .name = S390_CPU_TYPE_NAME("host"), |
| .parent = TYPE_S390_CPU, |
| .instance_init = s390_host_cpu_model_initfn, |
| .instance_finalize = s390_cpu_model_finalize, |
| .class_init = s390_host_cpu_model_class_init, |
| }; |
| #endif |
| |
| static void register_types(void) |
| { |
| int i; |
| |
| /* init all bitmaps from gnerated data initially */ |
| for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { |
| s390_init_feat_bitmap(s390_cpu_defs[i].base_init, |
| s390_cpu_defs[i].base_feat); |
| s390_init_feat_bitmap(s390_cpu_defs[i].default_init, |
| s390_cpu_defs[i].default_feat); |
| s390_init_feat_bitmap(s390_cpu_defs[i].full_init, |
| s390_cpu_defs[i].full_feat); |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { |
| char *base_name = s390_base_cpu_type_name(s390_cpu_defs[i].name); |
| TypeInfo ti_base = { |
| .name = base_name, |
| .parent = TYPE_S390_CPU, |
| .instance_init = s390_cpu_model_initfn, |
| .instance_finalize = s390_cpu_model_finalize, |
| .class_init = s390_base_cpu_model_class_init, |
| .class_data = (void *) &s390_cpu_defs[i], |
| }; |
| char *name = s390_cpu_type_name(s390_cpu_defs[i].name); |
| TypeInfo ti = { |
| .name = name, |
| .parent = TYPE_S390_CPU, |
| .instance_init = s390_cpu_model_initfn, |
| .instance_finalize = s390_cpu_model_finalize, |
| .class_init = s390_cpu_model_class_init, |
| .class_data = (void *) &s390_cpu_defs[i], |
| }; |
| |
| type_register_static(&ti_base); |
| type_register_static(&ti); |
| g_free(base_name); |
| g_free(name); |
| } |
| |
| type_register_static(&qemu_s390_cpu_type_info); |
| #ifdef CONFIG_KVM |
| type_register_static(&host_s390_cpu_type_info); |
| #endif |
| } |
| |
| type_init(register_types) |
