]> git.proxmox.com Git - qemu.git/blame - hw/virtio-balloon.h
Merge remote-tracking branch 'kraxel/usb.31' into staging
[qemu.git] / hw / virtio-balloon.h
CommitLineData
bd322087
AL
1/*
2 * Virtio Support
3 *
4 * Copyright IBM, Corp. 2007-2008
5 *
6 * Authors:
7 * Anthony Liguori <aliguori@us.ibm.com>
8 * Rusty Russell <rusty@rustcorp.com.au>
9 *
10 * This work is licensed under the terms of the GNU GPL, version 2. See
11 * the COPYING file in the top-level directory.
12 *
13 */
14
15#ifndef _QEMU_VIRTIO_BALLOON_H
16#define _QEMU_VIRTIO_BALLOON_H
17
18#include "virtio.h"
19#include "pci.h"
20
21/* from Linux's linux/virtio_balloon.h */
22
23/* The ID for virtio_balloon */
24#define VIRTIO_ID_BALLOON 5
25
26/* The feature bitmap for virtio balloon */
27#define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */
625a5bef 28#define VIRTIO_BALLOON_F_STATS_VQ 1 /* Memory stats virtqueue */
bd322087
AL
29
30/* Size of a PFN in the balloon interface. */
31#define VIRTIO_BALLOON_PFN_SHIFT 12
32
33struct virtio_balloon_config
34{
35 /* Number of pages host wants Guest to give up. */
36 uint32_t num_pages;
37 /* Number of pages we've actually got in balloon. */
38 uint32_t actual;
39};
40
625a5bef
AL
41/* Memory Statistics */
42#define VIRTIO_BALLOON_S_SWAP_IN 0 /* Amount of memory swapped in */
43#define VIRTIO_BALLOON_S_SWAP_OUT 1 /* Amount of memory swapped out */
44#define VIRTIO_BALLOON_S_MAJFLT 2 /* Number of major faults */
45#define VIRTIO_BALLOON_S_MINFLT 3 /* Number of minor faults */
46#define VIRTIO_BALLOON_S_MEMFREE 4 /* Total amount of free memory */
47#define VIRTIO_BALLOON_S_MEMTOT 5 /* Total amount of memory */
48#define VIRTIO_BALLOON_S_NR 6
49
50typedef struct VirtIOBalloonStat {
51 uint16_t tag;
52 uint64_t val;
541dc0d4 53} QEMU_PACKED VirtIOBalloonStat;
625a5bef 54
bd322087 55#endif