[dpdk-dev] [PATCH v4 17/26] virtio: Use port IO to get PCI resource.

[Ouyang, Changchun]

> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen at networkplumber.org]
> Sent: Wednesday, February 11, 2015 12:33 PM
> To: Ouyang, Changchun
> Cc: dev at dpdk.org; Xie, Huawei; Cao, Waterman; Xu, Qian Q
> Subject: Re: [PATCH v4 17/26] virtio: Use port IO to get PCI resource.
> 
> On Mon,  9 Feb 2015 09:14:06 +0800
> Ouyang Changchun <changchun.ouyang at intel.com> wrote:
> 
> > Make virtio not require UIO for some security reasons, this is to match
> 6Wind's virtio-net-pmd.
> >
> > Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com>
> 
> This breaks applications that use link state interrupt.
> 
> If the non-UIO mode is used link state interrupt fd is not available.

If application use link state interrupt, then let it work in uio mode rather than proc/ioports mode,
As we know proc/ioports hasn't interrupt, 6wind implementation also don't introduce interrupt in it.

Thanks
Changchun