Re: [PATCH 3/3] Use UEFI MAC device as default configured by net_bootp6

[Andrei Borzenkov]

On Fri, Apr 17, 2015 at 9:41 AM, Michael Chang <address@hidden> wrote:
>>
>> Right now I am not even able to netboot in QEMU. Booting from CD and
>> attempting to read anything over net results in random failure.
>
> Are you using OVMF from openSUSE Factory

Virtualization repo.

 >
I was actually using it to
> test and verify the UEFI netboot, it works for me without problem for
> IPv4 and IPv6 network.
>

This is highly timing dependent so may differ for host, qemu, number
and speed of CPU versions etc.

>>
>> There is patch suggested in bug report
>> https://savannah.gnu.org/bugs/index.php?41731 but it currently crashes
>> OVMF so I cannot test it. Also it effectively makes multiple efinet on
>> single HW card useless anyway (it will open exclusively IPv4 instance
>> thus blocking any access to MAC device using SNP).
>
> Yes, I have to skip that patch to test IPv6 netboot, somehow it doesn't
> work with it ...
>

Try to enable serial console (-serial stdio) and see if OVMF crashed.

>>
>> So it looks like efinet needs redesign anyway.
>
> Agreed, but I'm not dare to do that so that's why I created this
> workaround patch.
>
> Let me know should I continue carrying it in the patch set or not? In my
> tests, without it somehow the net transfer stalls a lot due to multiple
> efinet card instance is configured ...
>

I have an idea what happens, I'll try to work on it at weekend. It
should make your patch unnecessary.