Subject: Re: report on debian-9.0-sparc64-NETINST-1.iso
with qemu



On Thu, Jan 26, 2017 at 10:16 PM, Bruno Haible <[email protected]> wrote:
> Mark Cave-Ayland wrote:
>> >> The hardware emulated by QEMU on this platform is
>> >> hub 0
>> >> \ hub0port1: user.0: index=0,type=user,net=10.0.2.0,restrict=off
>> >> \ hub0port0: ne2k_pci.0:
>> >> index=0,type=nic,model=ne2k_pci,macaddr=52:54:00:12:34:56
>> >> Does anyone happen to know?
>> >
>> > You should ask Mark Cave-Ayland or Artyom Tarasenko who are the
>> > maintainers for
>> > the SPARC target in qemu.
>>
>> I can confirm that virtio does work in QEMU, but only in legacy (0.9)
>> mode - for some reason if 1.0 mode is used then we seem to hang because
>> we're missing an interrupt. I've managed to recreate this locally but
>> not had the time to dig into the details yet - any help always
>> appreciated :)
>>
>> The command line you need for virtio on QEMU looks something like this:
>>
>> ./qemu-system-sparc64 -drive
>> file=debian-9.0-sparc64-NETINST-1.iso,if=none,index=0,id=cd,media=cdrom
>> -device virtio-blk-pci,disable-modern=on,drive=cd -nographic
>
> Thanks for the attempt to help. But I don't have a need for virtio for
> the disk or cdrom - the default works perfectly fine there. The problem I
> have is with the network card: the default doesn't work, and virtio
> (as recommended by Artyom) crashes qemu.

To be more specific, it's not crashing qemu. It just brings the
emulated system in a condition in which it won't function (trap after
the maximal trap level is reached). So it's not necessarily a...

qemu
bug. Can be a virtio/kernel bug as well.

But there is a point in Marks reply: maybe nowadays virtio-net also
has to be switched into the legacy mode.
Instead of "-net nic,model=virtio -net user" can you please try:

-netdev user,id=hostnet0 -device
virtio-net-pci,disable-modern=off,disable-legacy=off,disable-modern=on,netdev=hostnet0

--
Regards,
Artyom Tarasenko

SPARC and PPC PReP under qemu blog: http://tyom.blogspot.com/search/label/qemu



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