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cpu: Abstract CPU core type

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Add an abstract CPU core type that could be used by machines that want
to define and hotplug CPUs in core granularity.

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
               [Integer core property]
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
[dwg: changed property names to 'core-id' and 'nr-threads']
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Bharata B Rao 2016-05-12 09:18:16 +05:30 committed by David Gibson
parent 41346263c4
commit f1020c2c26
3 changed files with 120 additions and 0 deletions
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1
hw/cpu/Makefile.objs
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@ -2,4 +2,5 @@ obj-$(CONFIG_ARM11MPCORE) += arm11mpcore.o
obj-$(CONFIG_REALVIEW) += realview_mpcore.o
obj-$(CONFIG_A9MPCORE) += a9mpcore.o
obj-$(CONFIG_A15MPCORE) += a15mpcore.o
obj-y += core.o

88
hw/cpu/core.c Normal file
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@ -0,0 +1,88 @@
/*
* CPU core abstract device
*
* Copyright (C) 2016 Bharata B Rao <bharata@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "hw/cpu/core.h"
#include "qapi/visitor.h"
#include "qapi/error.h"
#include "sysemu/cpus.h"
static void core_prop_get_core_id(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
CPUCore *core = CPU_CORE(obj);
int64_t value = core->core_id;
visit_type_int(v, name, &value, errp);
}
static void core_prop_set_core_id(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
CPUCore *core = CPU_CORE(obj);
Error *local_err = NULL;
int64_t value;
visit_type_int(v, name, &value, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
core->core_id = value;
}
static void core_prop_get_nr_threads(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
CPUCore *core = CPU_CORE(obj);
int64_t value = core->nr_threads;
visit_type_int(v, name, &value, errp);
}
static void core_prop_set_nr_threads(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
CPUCore *core = CPU_CORE(obj);
Error *local_err = NULL;
int64_t value;
visit_type_int(v, name, &value, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
core->nr_threads = value;
}
static void cpu_core_instance_init(Object *obj)
{
CPUCore *core = CPU_CORE(obj);
object_property_add(obj, "core-id", "int", core_prop_get_core_id,
core_prop_set_core_id, NULL, NULL, NULL);
object_property_add(obj, "nr-threads", "int", core_prop_get_nr_threads,
core_prop_set_nr_threads, NULL, NULL, NULL);
core->nr_threads = smp_threads;
}
static const TypeInfo cpu_core_type_info = {
.name = TYPE_CPU_CORE,
.parent = TYPE_DEVICE,
.abstract = true,
.instance_size = sizeof(CPUCore),
.instance_init = cpu_core_instance_init,
};
static void cpu_core_register_types(void)
{
type_register_static(&cpu_core_type_info);
}
type_init(cpu_core_register_types)

31
include/hw/cpu/core.h Normal file
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@ -0,0 +1,31 @@
/*
* CPU core abstract device
*
* Copyright (C) 2016 Bharata B Rao <bharata@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef HW_CPU_CORE_H
#define HW_CPU_CORE_H
#include "qemu/osdep.h"
#include "hw/qdev.h"
#define TYPE_CPU_CORE "cpu-core"
#define CPU_CORE(obj) \
OBJECT_CHECK(CPUCore, (obj), TYPE_CPU_CORE)
typedef struct CPUCore {
/*< private >*/
DeviceState parent_obj;
/*< public >*/
int core_id;
int nr_threads;
} CPUCore;
#define CPU_CORE_PROP_CORE_ID "core-id"
#endif