1 #ifndef VHOST_H 2 #define VHOST_H 3 4 #include "hw/hw.h" 5 #include "hw/virtio/vhost-backend.h" 6 #include "hw/virtio/virtio.h" 7 #include "exec/memory.h" 8 9 /* Generic structures common for any vhost based device. */ 10 struct vhost_virtqueue { 11 int kick; 12 int call; 13 void *desc; 14 void *avail; 15 void *used; 16 int num; 17 unsigned long long desc_phys; 18 unsigned desc_size; 19 unsigned long long avail_phys; 20 unsigned avail_size; 21 unsigned long long used_phys; 22 unsigned used_size; 23 EventNotifier masked_notifier; 24 struct vhost_dev *dev; 25 }; 26 27 typedef unsigned long vhost_log_chunk_t; 28 #define VHOST_LOG_PAGE 0x1000 29 #define VHOST_LOG_BITS (8 * sizeof(vhost_log_chunk_t)) 30 #define VHOST_LOG_CHUNK (VHOST_LOG_PAGE * VHOST_LOG_BITS) 31 #define VHOST_INVALID_FEATURE_BIT (0xff) 32 33 struct vhost_log { 34 unsigned long long size; 35 int refcnt; 36 int fd; 37 vhost_log_chunk_t *log; 38 }; 39 40 struct vhost_memory; 41 struct vhost_dev { 42 VirtIODevice *vdev; 43 MemoryListener memory_listener; 44 struct vhost_memory *mem; 45 int n_mem_sections; 46 MemoryRegionSection *mem_sections; 47 struct vhost_virtqueue *vqs; 48 int nvqs; 49 /* the first virtqueue which would be used by this vhost dev */ 50 int vq_index; 51 uint64_t features; 52 uint64_t acked_features; 53 uint64_t backend_features; 54 uint64_t protocol_features; 55 uint64_t max_queues; 56 bool started; 57 bool log_enabled; 58 uint64_t log_size; 59 Error *migration_blocker; 60 bool memory_changed; 61 hwaddr mem_changed_start_addr; 62 hwaddr mem_changed_end_addr; 63 const VhostOps *vhost_ops; 64 void *opaque; 65 struct vhost_log *log; 66 QLIST_ENTRY(vhost_dev) entry; 67 IOMMUNotifier n; 68 }; 69 70 int vhost_dev_init(struct vhost_dev *hdev, void *opaque, 71 VhostBackendType backend_type, 72 uint32_t busyloop_timeout); 73 void vhost_dev_cleanup(struct vhost_dev *hdev); 74 int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev); 75 void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev); 76 int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev); 77 void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev); 78 79 /* Test and clear masked event pending status. 80 * Should be called after unmask to avoid losing events. 81 */ 82 bool vhost_virtqueue_pending(struct vhost_dev *hdev, int n); 83 84 /* Mask/unmask events from this vq. 85 */ 86 void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n, 87 bool mask); 88 uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits, 89 uint64_t features); 90 void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits, 91 uint64_t features); 92 bool vhost_has_free_slot(void); 93 94 int vhost_net_set_backend(struct vhost_dev *hdev, 95 struct vhost_vring_file *file); 96 97 void vhost_device_iotlb_miss(struct vhost_dev *dev, uint64_t iova, int write); 98 #endif 99