4 * Copyright IBM, Corp. 2007-2008
7 * Anthony Liguori <aliguori@us.ibm.com>
8 * Rusty Russell <rusty@rustcorp.com.au>
10 * This work is licensed under the terms of the GNU GPL, version 2. See
11 * the COPYING file in the top-level directory.
15 #ifndef _QEMU_VIRTIO_BALLOON_H
16 #define _QEMU_VIRTIO_BALLOON_H
21 #include "virtio-transport.h"
23 /* from Linux's linux/virtio_balloon.h */
25 /* The ID for virtio_balloon */
26 #define VIRTIO_ID_BALLOON 5
28 /* The feature bitmap for virtio balloon */
29 #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */
30 #define VIRTIO_BALLOON_F_STATS_VQ 1 /* Memory stats virtqueue */
32 /* Size of a PFN in the balloon interface. */
33 #define VIRTIO_BALLOON_PFN_SHIFT 12
35 struct virtio_balloon_config
37 /* Number of pages host wants Guest to give up. */
39 /* Number of pages we've actually got in balloon. */
43 /* Memory Statistics */
44 #define VIRTIO_BALLOON_S_SWAP_IN 0 /* Amount of memory swapped in */
45 #define VIRTIO_BALLOON_S_SWAP_OUT 1 /* Amount of memory swapped out */
46 #define VIRTIO_BALLOON_S_MAJFLT 2 /* Number of major faults */
47 #define VIRTIO_BALLOON_S_MINFLT 3 /* Number of minor faults */
48 #define VIRTIO_BALLOON_S_MEMFREE 4 /* Total amount of free memory */
49 #define VIRTIO_BALLOON_S_MEMTOT 5 /* Total amount of memory */
50 #define VIRTIO_BALLOON_S_NR 6
52 typedef struct VirtIOBalloonStat {
55 } QEMU_PACKED VirtIOBalloonStat;
59 VirtIOTransportLink *trl;
62 #define VIRTIO_BALLOON_FROM_QDEV(dev) DO_UPCAST(VirtIOBaloonState, qdev, dev)