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/*
* Dimm device for Memory Hotplug
*
* Copyright ProfitBricks GmbH 2012
* Copyright (C) 2014 Red Hat Inc
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>
*/
#include "hw/mem/pc-dimm.h"
#include "qemu/config-file.h"
#include "qapi/visitor.h"
static Property pc_dimm_properties[] = {
DEFINE_PROP_UINT64(PC_DIMM_ADDR_PROP, PCDIMMDevice, addr, 0),
DEFINE_PROP_UINT32(PC_DIMM_NODE_PROP, PCDIMMDevice, node, 0),
DEFINE_PROP_INT32(PC_DIMM_SLOT_PROP, PCDIMMDevice, slot,
PC_DIMM_UNASSIGNED_SLOT),
DEFINE_PROP_END_OF_LIST(),
};
static void pc_dimm_get_size(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
int64_t value;
MemoryRegion *mr;
PCDIMMDevice *dimm = PC_DIMM(obj);
mr = host_memory_backend_get_memory(dimm->hostmem, errp);
value = memory_region_size(mr);
visit_type_int(v, &value, name, errp);
}
static void pc_dimm_check_memdev_is_busy(Object *obj, const char *name,
Object *val, Error **errp)
{
MemoryRegion *mr;
mr = host_memory_backend_get_memory(MEMORY_BACKEND(val), errp);
if (memory_region_is_mapped(mr)) {
char *path = object_get_canonical_path_component(val);
error_setg(errp, "can't use already busy memdev: %s", path);
g_free(path);
} else {
qdev_prop_allow_set_link_before_realize(obj, name, val, errp);
}
}
static void pc_dimm_init(Object *obj)
{
PCDIMMDevice *dimm = PC_DIMM(obj);
object_property_add(obj, PC_DIMM_SIZE_PROP, "int", pc_dimm_get_size,
NULL, NULL, NULL, &error_abort);
object_property_add_link(obj, PC_DIMM_MEMDEV_PROP, TYPE_MEMORY_BACKEND,
(Object **)&dimm->hostmem,
pc_dimm_check_memdev_is_busy,
OBJ_PROP_LINK_UNREF_ON_RELEASE,
&error_abort);
}
static void pc_dimm_realize(DeviceState *dev, Error **errp)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
if (!dimm->hostmem) {
error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set");
return;
}
}
static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm)
{
return host_memory_backend_get_memory(dimm->hostmem, &error_abort);
}
static void pc_dimm_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc);
dc->realize = pc_dimm_realize;
dc->props = pc_dimm_properties;
ddc->get_memory_region = pc_dimm_get_memory_region;
}
static TypeInfo pc_dimm_info = {
.name = TYPE_PC_DIMM,
.parent = TYPE_DEVICE,
.instance_size = sizeof(PCDIMMDevice),
.instance_init = pc_dimm_init,
.class_init = pc_dimm_class_init,
.class_size = sizeof(PCDIMMDeviceClass),
};
static void pc_dimm_register_types(void)
{
type_register_static(&pc_dimm_info);
}
type_init(pc_dimm_register_types)
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