5 #include "hw/virtio/vhost-backend.h"
6 #include "hw/virtio/virtio.h"
7 #include "exec/memory.h"
9 /* Generic structures common for any vhost based device. */
10 struct vhost_virtqueue {
17 unsigned long long used_phys;
20 unsigned long long ring_phys;
22 EventNotifier masked_notifier;
25 typedef unsigned long vhost_log_chunk_t;
26 #define VHOST_LOG_PAGE 0x1000
27 #define VHOST_LOG_BITS (8 * sizeof(vhost_log_chunk_t))
28 #define VHOST_LOG_CHUNK (VHOST_LOG_PAGE * VHOST_LOG_BITS)
29 #define VHOST_INVALID_FEATURE_BIT (0xff)
32 unsigned long long size;
35 vhost_log_chunk_t *log;
40 MemoryListener memory_listener;
41 struct vhost_memory *mem;
43 MemoryRegionSection *mem_sections;
44 struct vhost_virtqueue *vqs;
46 /* the first virtqueue which would be used by this vhost dev */
49 uint64_t acked_features;
50 uint64_t backend_features;
51 uint64_t protocol_features;
56 Error *migration_blocker;
58 hwaddr mem_changed_start_addr;
59 hwaddr mem_changed_end_addr;
60 const VhostOps *vhost_ops;
62 struct vhost_log *log;
63 QLIST_ENTRY(vhost_dev) entry;
66 int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
67 VhostBackendType backend_type,
68 uint32_t busyloop_timeout);
69 void vhost_dev_cleanup(struct vhost_dev *hdev);
70 int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev);
71 void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev);
72 int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev);
73 void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev);
75 /* Test and clear masked event pending status.
76 * Should be called after unmask to avoid losing events.
78 bool vhost_virtqueue_pending(struct vhost_dev *hdev, int n);
80 /* Mask/unmask events from this vq.
82 void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n,
84 uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
86 void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits,
88 bool vhost_has_free_slot(void);
90 int vhost_net_set_backend(struct vhost_dev *hdev,
91 struct vhost_vring_file *file);