1 #ifndef _LINUX_VIRTIO_BALLOON_H 2 #define _LINUX_VIRTIO_BALLOON_H 3 /* This header is BSD licensed so anyone can use the definitions to implement 4 * compatible drivers/servers. */ 5 #include <linux/virtio_config.h> 6 7 /* The ID for virtio_balloon */ 8 #define VIRTIO_ID_BALLOON 5 9 10 /* The feature bitmap for virtio balloon */ 11 #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */ 12 13 /* Size of a PFN in the balloon interface. */ 14 #define VIRTIO_BALLOON_PFN_SHIFT 12 15 16 struct virtio_balloon_config 17 { 18 /* Number of pages host wants Guest to give up. */ 19 __le32 num_pages; 20 /* Number of pages we've actually got in balloon. */ 21 __le32 actual; 22 }; 23 #endif /* _LINUX_VIRTIO_BALLOON_H */ 24