修改QEMU virtio記錄

修改版本為1.7.1

目前在

hw/virtio

新增 virtio-mydevice.h, virtio-mydevice.c

include/hw/virtio/virtio-mydevice.h

新增

typedef struct VirtIOmydevice {
    VirtIODevice parent_obj;
    //VirtQueue *ivq, *dvq, *svq;
    VirtQueue *vq[2];  //new
    uint32_t num_pages;
    uint32_t actual;
    uint64_t stats[VIRTIO_MYDEVICE_S_NR];
    VirtQueueElement stats_vq_elem;
    size_t stats_vq_offset;
    QEMUTimer *stats_timer;
    int64_t stats_last_update;
    int64_t stats_poll_interval;
    int status; //new

} VirtIOmydevice;

hw/virtio/virtio-mydevice.c 的 virtio_mydevice_device_init() 裡面去add virtio queue:

s->vq[0] = virtio_add_queue(vdev, 1024, virtio_mydevice_handle_output); 
s->vq[1] = virtio_add_queue(vdev, 1024, virtio_mydevice_handle_output); 

然後在virtio_mydevice_handle_output裡面去virtqueue_pop, virtqueue_push