| #ifndef VHOST_H |
| #define VHOST_H |
| |
| #include "hw/hw.h" |
| #include "hw/virtio/vhost-backend.h" |
| #include "hw/virtio/virtio.h" |
| #include "exec/memory.h" |
| |
| /* Generic structures common for any vhost based device. */ |
| struct vhost_virtqueue { |
| int kick; |
| int call; |
| void *desc; |
| void *avail; |
| void *used; |
| int num; |
| unsigned long long used_phys; |
| unsigned used_size; |
| void *ring; |
| unsigned long long ring_phys; |
| unsigned ring_size; |
| EventNotifier masked_notifier; |
| }; |
| |
| typedef unsigned long vhost_log_chunk_t; |
| #define VHOST_LOG_PAGE 0x1000 |
| #define VHOST_LOG_BITS (8 * sizeof(vhost_log_chunk_t)) |
| #define VHOST_LOG_CHUNK (VHOST_LOG_PAGE * VHOST_LOG_BITS) |
| #define VHOST_INVALID_FEATURE_BIT (0xff) |
| |
| struct vhost_log { |
| unsigned long long size; |
| int refcnt; |
| int fd; |
| vhost_log_chunk_t *log; |
| }; |
| |
| struct vhost_memory; |
| struct vhost_dev { |
| MemoryListener memory_listener; |
| struct vhost_memory *mem; |
| int n_mem_sections; |
| MemoryRegionSection *mem_sections; |
| struct vhost_virtqueue *vqs; |
| int nvqs; |
| /* the first virtqueue which would be used by this vhost dev */ |
| int vq_index; |
| uint64_t features; |
| uint64_t acked_features; |
| uint64_t backend_features; |
| uint64_t protocol_features; |
| uint64_t max_queues; |
| bool started; |
| bool log_enabled; |
| uint64_t log_size; |
| Error *migration_blocker; |
| bool memory_changed; |
| hwaddr mem_changed_start_addr; |
| hwaddr mem_changed_end_addr; |
| const VhostOps *vhost_ops; |
| void *opaque; |
| struct vhost_log *log; |
| QLIST_ENTRY(vhost_dev) entry; |
| }; |
| |
| int vhost_dev_init(struct vhost_dev *hdev, void *opaque, |
| VhostBackendType backend_type); |
| void vhost_dev_cleanup(struct vhost_dev *hdev); |
| int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev); |
| void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev); |
| int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev); |
| void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev); |
| |
| /* Test and clear masked event pending status. |
| * Should be called after unmask to avoid losing events. |
| */ |
| bool vhost_virtqueue_pending(struct vhost_dev *hdev, int n); |
| |
| /* Mask/unmask events from this vq. |
| */ |
| void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n, |
| bool mask); |
| uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits, |
| uint64_t features); |
| void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits, |
| uint64_t features); |
| bool vhost_has_free_slot(void); |
| #endif |