Re: [dpdk-dev] vhost [query] : support for multiple ports and non VMDQ devices in vhost switch

[Pankaj Chauhan <pankaj.chauhan@nxp.com>]

On 8/16/2016 8:26 AM, Yuanhan Liu wrote:
> On Tue, Aug 09, 2016 at 04:42:33PM +0530, Pankaj Chauhan wrote:
>>
>> Hi,
>>
>> I am working on an NXP platform where we intend to use user space vhost
>> switch (examples/vhost) as backend for VIRTIO devices. But there are two
>> limitations in current vhost-switch (examples/vhost)that are restricting my
>> use case:
>>
>> 1. The vhost-switch application is tightly integrated with Intel VMDQ. Since
>> my device doesn't have VMDQ i can not use this application directly.
>
> Sorry being late (I was on biz trip last week).
>
> Yes, a vhost example should not do that. We have an internal TODO to
> remove it. Actually, to make it optional, and Jianfeng was working on
> that. Well, seems that you two have already had some discussions.

Yes I had a discussion with Jianfeng and he has sent the work items on 
the list.
>
>> 2. The vhost-switch application supports only one external or physical port
>> (non virtio devices), but my requirement is to have multiple physical ports
>> and multiple virtio devices.
>
> What are you going to achieve? BTW, have you tried testpmd (with vhost-pmd)?
> I'm with impression that it might be a better option to you.
>
> 	--yliu
My use case is that my machine/board which is not sitting as end node of 
network but somewhere in between like an router. So the traffic looks 
something like this:

Physical port 1 -> Enter VM(s) through virtio -> exit from physical port 2

For above use case i need a vhost-back-end which supports multiple 
physical ports.

Thanks for the suggestion of vhost-pmd ( i was not aware of that), i'll 
explore possibility of using it for my use case of multiple physical ports.

thanks,
Pankaj

>