{
  "subsystems": [
    {
      "subsystem": "bdev",
      "config": [
        {
          "method": "bdev_virtio_attach_controller",
          "params": {
            "vq_count": 2,
            "traddr": "Malloc.0",
            "dev_type": "blk",
            "vq_size": 512,
            "name": "VirtioBlk0",
            "trtype": "user"
          }
        }
      ]
    }
  ]
}