[dpdk-dev] [PATCH v4] pci: support both PIO and MMIO BAR for legacy virtio on x86

[谢华伟(此时此刻）]

>   	switch (p->dev->kdrv) {
>   #ifdef VFIO_PRESENT
>   	case RTE_PCI_KDRV_VFIO:
> -		pci_vfio_ioport_read(p, data, len, offset);
> +		pci_uio_ioport_read(p, data, len, offset);
>   		break;
>   #endif
>   	case RTE_PCI_KDRV_IGB_UIO:
> -		pci_uio_ioport_read(p, data, len, offset);
> -		break;
>   	case RTE_PCI_KDRV_UIO_GENERIC:
>   		pci_uio_ioport_read(p, data, len, offset);
>   }


Maxime:

With this patch, virtio PIO/MMIO port RW is directly through user space 
instruction instead of vfio ioctl syscall.

/huawei