|  | #ifndef _LINUX_VIRTIO_BALLOON_H | 
|  | #define _LINUX_VIRTIO_BALLOON_H | 
|  | /* This header is BSD licensed so anyone can use the definitions to implement | 
|  | * compatible drivers/servers. */ | 
|  | #include <linux/virtio_config.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 */ | 
|  |  | 
|  | struct virtio_balloon_config | 
|  | { | 
|  | /* Number of pages host wants Guest to give up. */ | 
|  | __le32 num_pages; | 
|  | /* Number of pages we've actually got in balloon. */ | 
|  | __le32 actual; | 
|  | }; | 
|  | #endif /* _LINUX_VIRTIO_BALLOON_H */ |