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Diffstat (limited to 'include/hw/virtio/virtio-balloon.h')
| -rw-r--r-- | include/hw/virtio/virtio-balloon.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/include/hw/virtio/virtio-balloon.h b/include/hw/virtio/virtio-balloon.h new file mode 100644 index 0000000000..3b459bbdd7 --- /dev/null +++ b/include/hw/virtio/virtio-balloon.h @@ -0,0 +1,72 @@ +/* + * 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 "hw/virtio/virtio.h" +#include "hw/pci/pci.h" + +#define TYPE_VIRTIO_BALLOON "virtio-balloon" +#define VIRTIO_BALLOON(obj) \ + OBJECT_CHECK(VirtIOBalloon, (obj), TYPE_VIRTIO_BALLOON) + +/* 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; +} QEMU_PACKED VirtIOBalloonStat; + +typedef struct VirtIOBalloon { + VirtIODevice parent_obj; + VirtQueue *ivq, *dvq, *svq; + uint32_t num_pages; + uint32_t actual; + uint64_t stats[VIRTIO_BALLOON_S_NR]; + VirtQueueElement stats_vq_elem; + size_t stats_vq_offset; + QEMUTimer *stats_timer; + int64_t stats_last_update; + int64_t stats_poll_interval; +} VirtIOBalloon; + +#endif |