335d52f457
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.michel@greensocs.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Message-id: 20181207090135.7651-2-luc.michel@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/*
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* QEMU CPU cluster
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*
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* Copyright (c) 2018 GreenSocs SAS
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see
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* <http://www.gnu.org/licenses/gpl-2.0.html>
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*/
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#ifndef HW_CPU_CLUSTER_H
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#define HW_CPU_CLUSTER_H
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#include "qemu/osdep.h"
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#include "hw/qdev.h"
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/*
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* CPU Cluster type
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*
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* A cluster is a group of CPUs which are all identical and have the same view
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* of the rest of the system. It is mainly an internal QEMU representation and
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* does not necessarily match with the notion of clusters on the real hardware.
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*
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* If CPUs are not identical (for example, Cortex-A53 and Cortex-A57 CPUs in an
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* Arm big.LITTLE system) they should be in different clusters. If the CPUs do
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* not have the same view of memory (for example the main CPU and a management
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* controller processor) they should be in different clusters.
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*/
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#define TYPE_CPU_CLUSTER "cpu-cluster"
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#define CPU_CLUSTER(obj) \
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OBJECT_CHECK(CPUClusterState, (obj), TYPE_CPU_CLUSTER)
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/**
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* CPUClusterState:
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* @cluster_id: The cluster ID. This value is for internal use only and should
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* not be exposed directly to the user or to the guest.
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*
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* State of a CPU cluster.
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*/
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typedef struct CPUClusterState {
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/*< private >*/
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DeviceState parent_obj;
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/*< public >*/
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uint32_t cluster_id;
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} CPUClusterState;
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#endif
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