From: Luc Michel <luc.mic...@greensocs.com> This commit adds the cpu-cluster type. It aims at gathering CPUs from the same cluster in a machine.
For now it only has a `cluster-id` property. Documentation in cluster.h written with the help of Peter Maydell. Signed-off-by: Luc Michel <luc.mic...@greensocs.com> Reviewed-by: Alistair Francis <alistair.fran...@wdc.com> Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com> Tested-by: Philippe Mathieu-Daudé <phi...@redhat.com> Reviewed-by: Edgar E. Iglesias <edgar.igles...@xilinx.com> Message-id: 20181207090135.7651-2-luc.mic...@greensocs.com Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> --- hw/cpu/Makefile.objs | 2 +- include/hw/cpu/cluster.h | 58 ++++++++++++++++++++++++++++++++++++++++ hw/cpu/cluster.c | 50 ++++++++++++++++++++++++++++++++++ MAINTAINERS | 2 ++ 4 files changed, 111 insertions(+), 1 deletion(-) create mode 100644 include/hw/cpu/cluster.h create mode 100644 hw/cpu/cluster.c diff --git a/hw/cpu/Makefile.objs b/hw/cpu/Makefile.objs index cd52d20b652..8db9e8a7b3c 100644 --- a/hw/cpu/Makefile.objs +++ b/hw/cpu/Makefile.objs @@ -2,4 +2,4 @@ obj-$(CONFIG_ARM11MPCORE) += arm11mpcore.o obj-$(CONFIG_REALVIEW) += realview_mpcore.o obj-$(CONFIG_A9MPCORE) += a9mpcore.o obj-$(CONFIG_A15MPCORE) += a15mpcore.o -common-obj-y += core.o +common-obj-y += core.o cluster.o diff --git a/include/hw/cpu/cluster.h b/include/hw/cpu/cluster.h new file mode 100644 index 00000000000..73818232437 --- /dev/null +++ b/include/hw/cpu/cluster.h @@ -0,0 +1,58 @@ +/* + * 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> + */ +#ifndef HW_CPU_CLUSTER_H +#define HW_CPU_CLUSTER_H + +#include "qemu/osdep.h" +#include "hw/qdev.h" + +/* + * CPU Cluster type + * + * A cluster is a group of CPUs which are all identical and have the same view + * of the rest of the system. It is mainly an internal QEMU representation and + * does not necessarily match with the notion of clusters on the real hardware. + * + * If CPUs are not identical (for example, Cortex-A53 and Cortex-A57 CPUs in an + * Arm big.LITTLE system) they should be in different clusters. If the CPUs do + * not have the same view of memory (for example the main CPU and a management + * controller processor) they should be in different clusters. + */ + +#define TYPE_CPU_CLUSTER "cpu-cluster" +#define CPU_CLUSTER(obj) \ + OBJECT_CHECK(CPUClusterState, (obj), TYPE_CPU_CLUSTER) + +/** + * CPUClusterState: + * @cluster_id: The cluster ID. This value is for internal use only and should + * not be exposed directly to the user or to the guest. + * + * State of a CPU cluster. + */ +typedef struct CPUClusterState { + /*< private >*/ + DeviceState parent_obj; + + /*< public >*/ + uint32_t cluster_id; +} CPUClusterState; + +#endif diff --git a/hw/cpu/cluster.c b/hw/cpu/cluster.c new file mode 100644 index 00000000000..9d50a235d5c --- /dev/null +++ b/hw/cpu/cluster.c @@ -0,0 +1,50 @@ +/* + * 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 "qapi/error.h" +#include "qemu/module.h" + +static Property cpu_cluster_properties[] = { + DEFINE_PROP_UINT32("cluster-id", CPUClusterState, cluster_id, 0), + DEFINE_PROP_END_OF_LIST() +}; + +static void cpu_cluster_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->props = cpu_cluster_properties; +} + +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) diff --git a/MAINTAINERS b/MAINTAINERS index 19792cfb2da..471161742de 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1195,7 +1195,9 @@ M: Marcel Apfelbaum <marcel.apfelb...@gmail.com> S: Supported F: hw/core/machine.c F: hw/core/null-machine.c +F: hw/cpu/cluster.c F: include/hw/boards.h +F: include/hw/cpu/cluster.h T: git https://github.com/ehabkost/qemu.git machine-next Xtensa Machines -- 2.19.2
