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96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/*
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* Virtio MEM device
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*
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* Copyright (C) 2020 Red Hat, Inc.
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*
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* Authors:
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* David Hildenbrand <david@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef HW_VIRTIO_MEM_H
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#define HW_VIRTIO_MEM_H
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#include "standard-headers/linux/virtio_mem.h"
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#include "hw/virtio/virtio.h"
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#include "qapi/qapi-types-misc.h"
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#include "sysemu/hostmem.h"
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#include "qom/object.h"
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#define TYPE_VIRTIO_MEM "virtio-mem"
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OBJECT_DECLARE_TYPE(VirtIOMEM, VirtIOMEMClass,
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VIRTIO_MEM)
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#define VIRTIO_MEM_MEMDEV_PROP "memdev"
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#define VIRTIO_MEM_NODE_PROP "node"
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#define VIRTIO_MEM_SIZE_PROP "size"
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#define VIRTIO_MEM_REQUESTED_SIZE_PROP "requested-size"
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#define VIRTIO_MEM_BLOCK_SIZE_PROP "block-size"
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#define VIRTIO_MEM_ADDR_PROP "memaddr"
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#define VIRTIO_MEM_UNPLUGGED_INACCESSIBLE_PROP "unplugged-inaccessible"
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#define VIRTIO_MEM_PREALLOC_PROP "prealloc"
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struct VirtIOMEM {
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VirtIODevice parent_obj;
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/* guest -> host request queue */
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VirtQueue *vq;
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/* bitmap used to track unplugged memory */
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int32_t bitmap_size;
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unsigned long *bitmap;
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/* assigned memory backend and memory region */
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HostMemoryBackend *memdev;
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/* NUMA node */
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uint32_t node;
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/* assigned address of the region in guest physical memory */
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uint64_t addr;
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/* usable region size (<= region_size) */
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uint64_t usable_region_size;
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/* actual size (how much the guest plugged) */
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uint64_t size;
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/* requested size */
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uint64_t requested_size;
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/* block size and alignment */
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uint64_t block_size;
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/*
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* Whether we indicate VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE to the guest.
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* For !x86 targets this will always be "on" and consequently indicate
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* VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE.
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*/
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OnOffAuto unplugged_inaccessible;
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/* whether to prealloc memory when plugging new blocks */
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bool prealloc;
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/* notifiers to notify when "size" changes */
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NotifierList size_change_notifiers;
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/* listeners to notify on plug/unplug activity. */
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QLIST_HEAD(, RamDiscardListener) rdl_list;
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};
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struct VirtIOMEMClass {
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/* private */
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VirtIODevice parent;
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/* public */
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void (*fill_device_info)(const VirtIOMEM *vmen, VirtioMEMDeviceInfo *vi);
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MemoryRegion *(*get_memory_region)(VirtIOMEM *vmem, Error **errp);
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void (*add_size_change_notifier)(VirtIOMEM *vmem, Notifier *notifier);
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void (*remove_size_change_notifier)(VirtIOMEM *vmem, Notifier *notifier);
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};
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#endif
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