@@ -34,10 +34,15 @@
#define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */
#define VIRTIO_BALLOON_F_STATS_VQ 1 /* Memory Stats virtqueue */
#define VIRTIO_BALLOON_F_DEFLATE_ON_OOM 2 /* Deflate balloon on OOM */
+#define VIRTIO_BALLOON_F_PAGE_RANGE 3 /* Send page info with ranges */
+#define VIRTIO_BALLOON_F_HOST_REQ_VQ 4 /* Host request virtqueue */
/* Size of a PFN in the balloon interface. */
#define VIRTIO_BALLOON_PFN_SHIFT 12
+/* Bits width for the length of the pfn range */
+#define VIRTIO_BALLOON_NR_PFN_BITS 12
+
struct virtio_balloon_config {
/* Number of pages host wants Guest to give up. */
uint32_t num_pages;
@@ -82,4 +87,33 @@ struct virtio_balloon_stat {
__virtio64 val;
} QEMU_PACKED;
+/* Response header structure */
+struct virtio_balloon_resp_hdr {
+ uint64_t cmd : 8; /* Distinguish different requests type */
+ uint64_t flag: 8; /* Mark status for a specific request type */
+ uint64_t id : 16; /* Distinguish requests of a specific type */
+ uint64_t data_len: 32; /* Length of the following data, in bytes */
+};
+
+enum virtio_balloon_req_id {
+ /* Get unused page information */
+ BALLOON_GET_UNUSED_PAGES,
+};
+
+enum virtio_balloon_flag {
+ /* Have more data for a request */
+ BALLOON_FLAG_CONT,
+ /* No more data for a request */
+ BALLOON_FLAG_DONE,
+};
+
+struct virtio_balloon_req_hdr {
+ /* Used to distinguish different requests */
+ uint16_t cmd;
+ /* Reserved */
+ uint16_t reserved[3];
+ /* Request parameter */
+ uint64_t param;
+};
+
#endif /* _LINUX_VIRTIO_BALLOON_H */
Update the linux head file to keep consistent with kernel side. The new definition will be used in the following patches. Signed-off-by: Liang Li <liang.z.li@intel.com> --- include/standard-headers/linux/virtio_balloon.h | 34 +++++++++++++++++++++++++ 1 file changed, 34 insertions(+)