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/*
* QEMU Host Memory Backend
*
* Copyright (C) 2013-2014 Red Hat Inc
*
* Authors:
* Igor Mammedov <imammedo@redhat.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 "sysemu/hostmem.h"
#include "sysemu/sysemu.h"
#include "qapi/visitor.h"
#include "qapi/qmp/qerror.h"
#include "qemu/config-file.h"
#include "qom/object_interfaces.h"
static void
hostmemory_backend_get_size(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
uint64_t value = backend->size;
visit_type_size(v, &value, name, errp);
}
static void
hostmemory_backend_set_size(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
Error *local_err = NULL;
uint64_t value;
if (memory_region_size(&backend->mr)) {
error_setg(&local_err, "cannot change property value");
goto out;
}
visit_type_size(v, &value, name, &local_err);
if (local_err) {
goto out;
}
if (!value) {
error_setg(&local_err, "Property '%s.%s' doesn't take value '%"
PRIu64 "'", object_get_typename(obj), name, value);
goto out;
}
backend->size = value;
out:
error_propagate(errp, local_err);
}
static void hostmemory_backend_init(Object *obj)
{
object_property_add(obj, "size", "int",
hostmemory_backend_get_size,
hostmemory_backend_set_size, NULL, NULL, NULL);
}
static void hostmemory_backend_finalize(Object *obj)
{
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
if (memory_region_size(&backend->mr)) {
memory_region_destroy(&backend->mr);
}
}
MemoryRegion *
host_memory_backend_get_memory(HostMemoryBackend *backend, Error **errp)
{
return memory_region_size(&backend->mr) ? &backend->mr : NULL;
}
static const TypeInfo hostmemory_backend_info = {
.name = TYPE_MEMORY_BACKEND,
.parent = TYPE_OBJECT,
.abstract = true,
.class_size = sizeof(HostMemoryBackendClass),
.instance_size = sizeof(HostMemoryBackend),
.instance_init = hostmemory_backend_init,
.instance_finalize = hostmemory_backend_finalize,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
}
};
static void register_types(void)
{
type_register_static(&hostmemory_backend_info);
}
type_init(register_types);
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