/* * Virtio Support * * Copyright IBM, Corp. 2007-2008 * * Authors: * Anthony Liguori <aliguori@us.ibm.com> * Rusty Russell <rusty@rustcorp.com.au> * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. * */ #ifndef _QEMU_VIRTIO_BALLOON_H #define _QEMU_VIRTIO_BALLOON_H #include "virtio.h" #include "pci.h" /* from Linux's linux/virtio_balloon.h */ /* The ID for virtio_balloon */ #define VIRTIO_ID_BALLOON 5 /* The feature bitmap for virtio balloon */ #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */ #define VIRTIO_BALLOON_F_STATS_VQ 1 /* Memory stats virtqueue */ /* Size of a PFN in the balloon interface. */ #define VIRTIO_BALLOON_PFN_SHIFT 12 struct virtio_balloon_config { /* Number of pages host wants Guest to give up. */ uint32_t num_pages; /* Number of pages we've actually got in balloon. */ uint32_t actual; }; /* Memory Statistics */ #define VIRTIO_BALLOON_S_SWAP_IN 0 /* Amount of memory swapped in */ #define VIRTIO_BALLOON_S_SWAP_OUT 1 /* Amount of memory swapped out */ #define VIRTIO_BALLOON_S_MAJFLT 2 /* Number of major faults */ #define VIRTIO_BALLOON_S_MINFLT 3 /* Number of minor faults */ #define VIRTIO_BALLOON_S_MEMFREE 4 /* Total amount of free memory */ #define VIRTIO_BALLOON_S_MEMTOT 5 /* Total amount of memory */ #define VIRTIO_BALLOON_S_NR 6 typedef struct VirtIOBalloonStat { uint16_t tag; uint64_t val; } __attribute__((packed)) VirtIOBalloonStat; #endif