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Re: [Qemu-devel] Connecting netdev to emulated nics.


From: sai pavan
Subject: Re: [Qemu-devel] Connecting netdev to emulated nics.
Date: Fri, 16 Oct 2015 10:45:45 +0530

+Peter

Hi Jason,

On Thu, Oct 15, 2015 at 2:44 PM, Jason Wang <address@hidden> wrote:
>
>
> On 10/15/2015 02:36 PM, sai pavan wrote:
>> Hi,
>>
>> I am debugging an issue, where through one of the nics I am not able
>> to connect to dtcp.
>> So to dig in deep, i was going thought net.c files, and ended-up
>> understanding little.
>>
>> So can i know how does a netdev connects to nic.
>>
>> nd_table[] has some pointers for netdev devices. Where are this
>> actually instantiated ? I am missing that part of the code.
>>
>> How do the netdevs and nic's have 1-1 connections.
>
> You may want to have a look at set_netdev().
Thanks this helped to see more regarding netdev.

one more question, there are 4 Ethernet Controllers in the soc im working on
https://github.com/qemu/qemu/blob/master/hw/arm/xlnx-zynqmp.c#L223

Each having configure nic and netdev internally. But only one can
automatically connect to dhcp. Each one is assigned default mac
address, Do each of the mac needs to be pre-registered with internal
dhcp.?

Regards,
Sai Pavan

>
>>
>> And if my SOC has more than 1 sysbus type ethernet chips. How can i
>> connect each one of them from command line ?
>
> You can do this by using hubport as nic's peer e.g:
>
> -netdev hubport,id=port0,hubid=hubid -device e1000,netdev=port0
>
>>
>> Regards,
>> Sai Pavan
>



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