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- /*
- * QEMU CPU cluster
- *
- * Copyright (c) 2018 GreenSocs SAS
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see
- * <http://www.gnu.org/licenses/gpl-2.0.html>
- */
- #include "qemu/osdep.h"
- #include "hw/cpu/cluster.h"
- #include "hw/qdev-properties.h"
- #include "hw/core/cpu.h"
- #include "qapi/error.h"
- #include "qemu/module.h"
- #include "qemu/cutils.h"
- static Property cpu_cluster_properties[] = {
- DEFINE_PROP_UINT32("cluster-id", CPUClusterState, cluster_id, 0),
- DEFINE_PROP_END_OF_LIST()
- };
- typedef struct CallbackData {
- CPUClusterState *cluster;
- int cpu_count;
- } CallbackData;
- static int add_cpu_to_cluster(Object *obj, void *opaque)
- {
- CallbackData *cbdata = opaque;
- CPUState *cpu = (CPUState *)object_dynamic_cast(obj, TYPE_CPU);
- if (cpu) {
- cpu->cluster_index = cbdata->cluster->cluster_id;
- cbdata->cpu_count++;
- }
- return 0;
- }
- static void cpu_cluster_realize(DeviceState *dev, Error **errp)
- {
- /* Iterate through all our CPU children and set their cluster_index */
- CPUClusterState *cluster = CPU_CLUSTER(dev);
- Object *cluster_obj = OBJECT(dev);
- CallbackData cbdata = {
- .cluster = cluster,
- .cpu_count = 0,
- };
- if (cluster->cluster_id >= MAX_CLUSTERS) {
- error_setg(errp, "cluster-id must be less than %d", MAX_CLUSTERS);
- return;
- }
- object_child_foreach_recursive(cluster_obj, add_cpu_to_cluster, &cbdata);
- /*
- * A cluster with no CPUs is a bug in the board/SoC code that created it;
- * if you hit this during development of new code, check that you have
- * created the CPUs and parented them into the cluster object before
- * realizing the cluster object.
- */
- assert(cbdata.cpu_count > 0);
- }
- static void cpu_cluster_class_init(ObjectClass *klass, void *data)
- {
- DeviceClass *dc = DEVICE_CLASS(klass);
- dc->props = cpu_cluster_properties;
- dc->realize = cpu_cluster_realize;
- /* This is not directly for users, CPU children must be attached by code */
- dc->user_creatable = false;
- }
- static const TypeInfo cpu_cluster_type_info = {
- .name = TYPE_CPU_CLUSTER,
- .parent = TYPE_DEVICE,
- .instance_size = sizeof(CPUClusterState),
- .class_init = cpu_cluster_class_init,
- };
- static void cpu_cluster_register_types(void)
- {
- type_register_static(&cpu_cluster_type_info);
- }
- type_init(cpu_cluster_register_types)
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