Re: [Qemu-devel] Arm virtual machine networking problem with build for 64bit host

["mar.krzeminski" <mar.krzeminski@gmail.com>]

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Hello,

Problem solved, there was bug in my gmac model, that cause writes 
outside my gmac device state structure.
That leads to such (undefined) behaviour.

Regards,
Marcin


W dniu 10.10.2015 o 22:34, mar.krzeminski pisze:
> Hello,
>
> I have my own virtual machine (already asked some questions about that 
> here).
> I also have my own gmac model. I am building qemu (version 2.4.0.1) 
> for 32 and 64 linux hosts.
> The problem is with 64 bit binary. If I run as guest under qemu linux, 
> I could not even ping my machine.
> In 32 bit version it works fine. And if I run in this 64 bit host 
> u-boot pingf from u-boot qorks fine.
> From debugging it seems that under linux (32 bit arm) started on 64 
> linux host can_receive function from my model,
> is called only once when virtual machine is booting, there is no 
> furthers call so that is why I can not ping.
> I am running qemu in this way (based on yocto scripts):
>
> /qemu-system-arm -kernel zImage.bin -net nic,vlan=0 -net 
> tap,vlan=0,ifname=tap0,script=no,downscript=no -M macine-a9 -dtb 
> zImage.dtb -serial null -serial null -serial null -serial mon:stdio 
> -serial null -nographic -smp 2 -readconfig config -m 512 --append 
> "ip=192.168.7.2::192.168.7.1:255.255.255.0 noinitrd 
> console=ttyS3,19200 earlyprintk debug=31"/
>
> As there is lack of documentation (or maybe there is but I haven't got 
> it ), my question is where should I start debugging what is going wrong?
> As for now it seems that my model does not receive ping and it is not 
> asked if can receive one. Situation is same when I ping from quest the 
> host's tap,
> or from host guest machine.
>
> Regards,
> Marcin


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