hw/vhost.h

   1 #ifndef VHOST_H
   2 #define VHOST_H
   3
   4 #include "hw/hw.h"
   5 #include "hw/virtio.h"
   6
   7 /* Generic structures common for any vhost based device. */
   8 struct vhost_virtqueue {
   9     int kick;
  10     int call;
  11     void *desc;
  12     void *avail;
  13     void *used;
  14     int num;
  15     unsigned long long used_phys;
  16     unsigned used_size;
  17     void *ring;
  18     unsigned long long ring_phys;
  19     unsigned ring_size;
  20 };
  21
  22 typedef unsigned long vhost_log_chunk_t;
  23 #define VHOST_LOG_PAGE 0x1000
  24 #define VHOST_LOG_BITS (8 * sizeof(vhost_log_chunk_t))
  25 #define VHOST_LOG_CHUNK (VHOST_LOG_PAGE * VHOST_LOG_BITS)
  26
  27 struct vhost_memory;
  28 struct vhost_dev {
  29     CPUPhysMemoryClient client;
  30     int control;
  31     struct vhost_memory *mem;
  32     struct vhost_virtqueue *vqs;
  33     int nvqs;
  34     unsigned long long features;
  35     unsigned long long acked_features;
  36     unsigned long long backend_features;
  37     bool started;
  38     bool log_enabled;
  39     vhost_log_chunk_t *log;
  40     unsigned long long log_size;
  41 };
  42
  43 int vhost_dev_init(struct vhost_dev *hdev, int devfd);
  44 void vhost_dev_cleanup(struct vhost_dev *hdev);
  45 int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev);
  46 void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev);
  47
  48 #endif