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_dev; 41 struct vhost_iommu { 42 struct vhost_dev *hdev; 43 MemoryRegion *mr; 44 hwaddr iommu_offset; 45 IOMMUNotifier n; 46 QLIST_ENTRY(vhost_iommu) iommu_next; 47 }; 48 49 struct vhost_memory; 50 struct vhost_dev { 51 VirtIODevice *vdev; 52 MemoryListener memory_listener; 53 MemoryListener iommu_listener; 54 struct vhost_memory *mem; 55 int n_mem_sections; 56 MemoryRegionSection *mem_sections; 57 struct vhost_virtqueue *vqs; 58 int nvqs; 59 /* the first virtqueue which would be used by this vhost dev */ 60 int vq_index; 61 uint64_t features; 62 uint64_t acked_features; 63 uint64_t backend_features; 64 uint64_t protocol_features; 65 uint64_t max_queues; 66 bool started; 67 bool log_enabled; 68 uint64_t log_size; 69 Error *migration_blocker; 70 bool memory_changed; 71 hwaddr mem_changed_start_addr; 72 hwaddr mem_changed_end_addr; 73 const VhostOps *vhost_ops; 74 void *opaque; 75 struct vhost_log *log; 76 QLIST_ENTRY(vhost_dev) entry; 77 QLIST_HEAD(, vhost_iommu) iommu_list; 78 IOMMUNotifier n; 79 }; 80 81 int vhost_dev_init(struct vhost_dev *hdev, void *opaque, 82 VhostBackendType backend_type, 83 uint32_t busyloop_timeout); 84 void vhost_dev_cleanup(struct vhost_dev *hdev); 85 int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev); 86 void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev); 87 int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev); 88 void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev); 89 90 /* Test and clear masked event pending status. 91 * Should be called after unmask to avoid losing events. 92 */ 93 bool vhost_virtqueue_pending(struct vhost_dev *hdev, int n); 94 95 /* Mask/unmask events from this vq. 96 */ 97 void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n, 98 bool mask); 99 uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits, 100 uint64_t features); 101 void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits, 102 uint64_t features); 103 bool vhost_has_free_slot(void); 104 105 int vhost_net_set_backend(struct vhost_dev *hdev, 106 struct vhost_vring_file *file); 107 108 int vhost_device_iotlb_miss(struct vhost_dev *dev, uint64_t iova, int write); 109 #endif 110