LXR qemu/hw/virtio-balloon.h

   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 */
  28#define VIRTIO_BALLOON_F_STATS_VQ 1       /* Memory stats virtqueue */
  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
  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;
  53} __attribute__((packed)) VirtIOBalloonStat;
  54
  55#endif
  56