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 void vhost_dev_cleanup(struct vhost_dev
*hdev
);
69 int vhost_dev_start(struct vhost_dev
*hdev
, VirtIODevice
*vdev
);
70 void vhost_dev_stop(struct vhost_dev
*hdev
, VirtIODevice
*vdev
);
71 int vhost_dev_enable_notifiers(struct vhost_dev
*hdev
, VirtIODevice
*vdev
);
72 void vhost_dev_disable_notifiers(struct vhost_dev
*hdev
, VirtIODevice
*vdev
);
74 /* Test and clear masked event pending status.
75 * Should be called after unmask to avoid losing events.
77 bool vhost_virtqueue_pending(struct vhost_dev
*hdev
, int n
);
79 /* Mask/unmask events from this vq.
81 void vhost_virtqueue_mask(struct vhost_dev
*hdev
, VirtIODevice
*vdev
, int n
,
83 uint64_t vhost_get_features(struct vhost_dev
*hdev
, const int *feature_bits
,
85 void vhost_ack_features(struct vhost_dev
*hdev
, const int *feature_bits
,
87 bool vhost_has_free_slot(void);