diff options
Diffstat (limited to 'target/s390x/cpu_models_sysemu.c')
| -rw-r--r-- | target/s390x/cpu_models_sysemu.c | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/target/s390x/cpu_models_sysemu.c b/target/s390x/cpu_models_sysemu.c new file mode 100644 index 0000000000..05c3ccaaff --- /dev/null +++ b/target/s390x/cpu_models_sysemu.c @@ -0,0 +1,426 @@ +/* + * CPU models for s390x - System Emulation-only + * + * 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 "s390x-internal.h" +#include "kvm/kvm_s390x.h" +#include "sysemu/kvm.h" +#include "sysemu/tcg.h" +#include "qapi/error.h" +#include "qapi/visitor.h" +#include "qapi/qmp/qerror.h" +#include "qapi/qobject-input-visitor.h" +#include "qapi/qmp/qdict.h" +#include "qapi/qapi-commands-machine-target.h" + +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; + CpuDefinitionInfo *info; + char *name = g_strdup(object_class_get_name(klass)); + S390CPUClass *scc = S390_CPU_CLASS(klass); + + /* strip off the -s390x-cpu */ + g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0; + info = g_new0(CpuDefinitionInfo, 1); + 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_with_class(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); + } + + QAPI_LIST_PREPEND(*cpu_list, info); +} + +CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp) +{ + struct CpuDefinitionInfoListData list_data = { + .list = NULL, + }; + + list_data.model = get_max_cpu_model(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) +{ + Error *err = NULL; + 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_with_class(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); + if (!visit_start_struct(visitor, NULL, NULL, 0, errp)) { + visit_free(visitor); + object_unref(obj); + return; + } + for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) { + if (!object_property_set(obj, e->key, visitor, &err)) { + break; + } + } + if (!err) { + visit_check_struct(visitor, &err); + } + visit_end_struct(visitor, NULL); + visit_free(visitor); + if (err) { + error_propagate(errp, err); + 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)) { + qobject_unref(qdict); + } else { + info->props = QOBJECT(qdict); + info->has_props = true; + } +} + +CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type, + CpuModelInfo *model, + Error **errp) +{ + Error *err = NULL; + CpuModelExpansionInfo *expansion_info = NULL; + S390CPUModel s390_model; + bool delta_changes = false; + + /* convert it to our internal representation */ + cpu_model_from_info(&s390_model, model, &err); + if (err) { + error_propagate(errp, err); + 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_new0(CpuModelExpansionInfo, 1); + 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; + + QAPI_LIST_PREPEND(*last, g_strdup(name)); +} + +CpuModelCompareInfo *qmp_query_cpu_model_comparison(CpuModelInfo *infoa, + CpuModelInfo *infob, + Error **errp) +{ + Error *err = NULL; + 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, &err); + if (err) { + error_propagate(errp, err); + return NULL; + } + cpu_model_from_info(&modelb, infob, &err); + if (err) { + error_propagate(errp, err); + return NULL; + } + compare_info = g_new0(CpuModelCompareInfo, 1); + + /* 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 *qmp_query_cpu_model_baseline(CpuModelInfo *infoa, + CpuModelInfo *infob, + Error **errp) +{ + Error *err = NULL; + 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, &err); + if (err) { + error_propagate(errp, err); + return NULL; + } + + cpu_model_from_info(&modelb, infob, &err); + if (err) { + error_propagate(errp, err); + 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); + + /* models without early base features (esan3) are bad */ + if (!model.def) { + error_setg(errp, "No compatible CPU model could be created as" + " important base features are disabled"); + return NULL; + } + + /* 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_new0(CpuModelBaselineInfo, 1); + baseline_info->model = g_malloc0(sizeof(*baseline_info->model)); + cpu_info_from_model(baseline_info->model, &model, true); + return baseline_info; +} + +void apply_cpu_model(const S390CPUModel *model, Error **errp) +{ + Error *err = NULL; + 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, &err); + if (err) { + error_propagate(errp, err); + return; + } + } + + applied = true; + if (model) { + applied_model = *model; + } +} |