Function virtio_configure_intr

dpdk/drivers/net/virtio/virtio_ethdev.c:1354–1407

}

static int
virtio_configure_intr(struct rte_eth_dev *dev)
{
	struct virtio_hw *hw = dev->data->dev_private;
	int ret;

	if (!rte_intr_cap_multiple(dev->intr_handle)) {
		PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
		return -ENOTSUP;
	}

	ret = rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues);
	if (ret < 0) {
		PMD_INIT_LOG(ERR, "Fail to create eventfd");
		return ret;
	}

	ret = rte_intr_vec_list_alloc(dev->intr_handle, "intr_vec",
				      hw->max_queue_pairs);
	if (ret < 0) {
		PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
			     hw->max_queue_pairs);
		return ret;
	}

	if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
		/* Re-register callback to update max_intr */
		rte_intr_callback_unregister(dev->intr_handle,
					     virtio_interrupt_handler,
					     dev);
		rte_intr_callback_register(dev->intr_handle,
					   virtio_interrupt_handler,
					   dev);
	}

	/* DO NOT try to remove this! This function will enable msix, or QEMU
	 * will encounter SIGSEGV when DRIVER_OK is sent.
	 * And for legacy devices, this should be done before queue/vec binding
	 * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
	 * (22) will be ignored.
	 */
	if (virtio_intr_enable(dev) < 0) {
		PMD_DRV_LOG(ERR, "interrupt enable failed");
		return -EINVAL;
	}

	ret = virtio_queues_bind_intr(dev);
	if (ret < 0) {
		PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
		return ret;
	}

	return 0;
}

static void
virtio_get_speed_duplex(struct rte_eth_dev *eth_dev,