1b6d6af21b
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>
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/*
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* PC DIMM device
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*
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* Copyright ProfitBricks GmbH 2012
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* Copyright (C) 2013-2014 Red Hat Inc
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*
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* Authors:
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* Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>
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* Igor Mammedov <imammedo@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_PC_DIMM_H
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#define QEMU_PC_DIMM_H
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#include "exec/memory.h"
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#include "sysemu/hostmem.h"
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#include "hw/qdev.h"
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#include "hw/boards.h"
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#define TYPE_PC_DIMM "pc-dimm"
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#define PC_DIMM(obj) \
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OBJECT_CHECK(PCDIMMDevice, (obj), TYPE_PC_DIMM)
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#define PC_DIMM_CLASS(oc) \
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OBJECT_CLASS_CHECK(PCDIMMDeviceClass, (oc), TYPE_PC_DIMM)
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#define PC_DIMM_GET_CLASS(obj) \
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OBJECT_GET_CLASS(PCDIMMDeviceClass, (obj), TYPE_PC_DIMM)
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#define PC_DIMM_ADDR_PROP "addr"
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#define PC_DIMM_SLOT_PROP "slot"
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#define PC_DIMM_NODE_PROP "node"
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#define PC_DIMM_SIZE_PROP "size"
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#define PC_DIMM_MEMDEV_PROP "memdev"
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#define PC_DIMM_UNASSIGNED_SLOT -1
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/**
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* PCDIMMDevice:
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* @addr: starting guest physical address, where @PCDIMMDevice is mapped.
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* Default value: 0, means that address is auto-allocated.
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* @node: numa node to which @PCDIMMDevice is attached.
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* @slot: slot number into which @PCDIMMDevice is plugged in.
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* Default value: -1, means that slot is auto-allocated.
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* @hostmem: host memory backend providing memory for @PCDIMMDevice
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*/
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typedef struct PCDIMMDevice {
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/* private */
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DeviceState parent_obj;
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/* public */
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uint64_t addr;
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uint32_t node;
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int32_t slot;
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HostMemoryBackend *hostmem;
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} PCDIMMDevice;
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/**
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* PCDIMMDeviceClass:
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* @realize: called after common dimm is realized so that the dimm based
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* devices get the chance to do specified operations.
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* @get_memory_region: returns #MemoryRegion associated with @dimm which
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* is directly mapped into the physical address space of guest.
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* @get_vmstate_memory_region: returns #MemoryRegion which indicates the
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* memory of @dimm should be kept during live migration.
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*/
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typedef struct PCDIMMDeviceClass {
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/* private */
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DeviceClass parent_class;
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/* public */
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void (*realize)(PCDIMMDevice *dimm, Error **errp);
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MemoryRegion *(*get_memory_region)(PCDIMMDevice *dimm, Error **errp);
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MemoryRegion *(*get_vmstate_memory_region)(PCDIMMDevice *dimm);
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} PCDIMMDeviceClass;
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int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
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void pc_dimm_memory_plug(DeviceState *dev, MachineState *machine,
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uint64_t align, Error **errp);
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void pc_dimm_memory_unplug(DeviceState *dev, MachineState *machine);
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#endif
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