qemu-e2k/include/hw/mem/pc-dimm.h
David Hildenbrand 1b6d6af21b pc-dimm: factor out capacity and slot checks into MemoryDevice
Move the checks into memory_device_get_free_addr(). This will check
before doing any calculations if we have KVM/vhost slots left and if
the total region size would be exceeded.

Of course, while at it, make it independent of pc-dimm code.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180423165126.15441-7-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-05-07 10:00:02 -03:00

85 lines
2.6 KiB
C

/*
* PC DIMM device
*
* Copyright ProfitBricks GmbH 2012
* Copyright (C) 2013-2014 Red Hat Inc
*
* Authors:
* Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>
* 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.
*
*/
#ifndef QEMU_PC_DIMM_H
#define QEMU_PC_DIMM_H
#include "exec/memory.h"
#include "sysemu/hostmem.h"
#include "hw/qdev.h"
#include "hw/boards.h"
#define TYPE_PC_DIMM "pc-dimm"
#define PC_DIMM(obj) \
OBJECT_CHECK(PCDIMMDevice, (obj), TYPE_PC_DIMM)
#define PC_DIMM_CLASS(oc) \
OBJECT_CLASS_CHECK(PCDIMMDeviceClass, (oc), TYPE_PC_DIMM)
#define PC_DIMM_GET_CLASS(obj) \
OBJECT_GET_CLASS(PCDIMMDeviceClass, (obj), TYPE_PC_DIMM)
#define PC_DIMM_ADDR_PROP "addr"
#define PC_DIMM_SLOT_PROP "slot"
#define PC_DIMM_NODE_PROP "node"
#define PC_DIMM_SIZE_PROP "size"
#define PC_DIMM_MEMDEV_PROP "memdev"
#define PC_DIMM_UNASSIGNED_SLOT -1
/**
* PCDIMMDevice:
* @addr: starting guest physical address, where @PCDIMMDevice is mapped.
* Default value: 0, means that address is auto-allocated.
* @node: numa node to which @PCDIMMDevice is attached.
* @slot: slot number into which @PCDIMMDevice is plugged in.
* Default value: -1, means that slot is auto-allocated.
* @hostmem: host memory backend providing memory for @PCDIMMDevice
*/
typedef struct PCDIMMDevice {
/* private */
DeviceState parent_obj;
/* public */
uint64_t addr;
uint32_t node;
int32_t slot;
HostMemoryBackend *hostmem;
} PCDIMMDevice;
/**
* PCDIMMDeviceClass:
* @realize: called after common dimm is realized so that the dimm based
* devices get the chance to do specified operations.
* @get_memory_region: returns #MemoryRegion associated with @dimm which
* is directly mapped into the physical address space of guest.
* @get_vmstate_memory_region: returns #MemoryRegion which indicates the
* memory of @dimm should be kept during live migration.
*/
typedef struct PCDIMMDeviceClass {
/* private */
DeviceClass parent_class;
/* public */
void (*realize)(PCDIMMDevice *dimm, Error **errp);
MemoryRegion *(*get_memory_region)(PCDIMMDevice *dimm, Error **errp);
MemoryRegion *(*get_vmstate_memory_region)(PCDIMMDevice *dimm);
} PCDIMMDeviceClass;
int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
void pc_dimm_memory_plug(DeviceState *dev, MachineState *machine,
uint64_t align, Error **errp);
void pc_dimm_memory_unplug(DeviceState *dev, MachineState *machine);
#endif