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;
34 vhost_log_chunk_t log[0];
39 MemoryListener memory_listener;
40 struct vhost_memory *mem;
42 MemoryRegionSection *mem_sections;
43 struct vhost_virtqueue *vqs;
45 /* the first virtqueue which would be used by this vhost dev */
47 unsigned long long features;
48 unsigned long long acked_features;
49 unsigned long long backend_features;
52 unsigned long long log_size;
53 Error *migration_blocker;
55 hwaddr mem_changed_start_addr;
56 hwaddr mem_changed_end_addr;
57 const VhostOps *vhost_ops;
59 struct vhost_log *log;
62 int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
63 VhostBackendType backend_type);
64 void vhost_dev_cleanup(struct vhost_dev *hdev);
65 bool vhost_dev_query(struct vhost_dev *hdev, VirtIODevice *vdev);
66 int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev);
67 void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev);
68 int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev);
69 void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev);
71 /* Test and clear masked event pending status.
72 * Should be called after unmask to avoid losing events.
74 bool vhost_virtqueue_pending(struct vhost_dev *hdev, int n);
76 /* Mask/unmask events from this vq.
78 void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n,
80 uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
82 void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits,