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



Can someone sitting in front of their computer please put that information up
on the Debian Wiki in the sparc64 section. I'd appreciate that a lot :).

Adrian
(currently on mobile)

> On Jan 27, 2017, at 7:52 PM, Bruno Haible <[email protected]> wrote:
>
> Artyom Tarasenko wrote on 27.01.2017:
>>> 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
>
> Yeah! This works! The machine now can connect to the internet.
> The ifconfig output now is:
>
> # /target/sbin/ifconfig
> enp0s5: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
> inet 10.0.2.15 netmask 255.255.255.0 broadcast 0.0.0.0
> inet6 fec0::5054:ff:fe12:3456 prefixlen 64 scopeid 0x40<site>
> inet6 fe80::5054:ff:fe12:3456 prefixlen 64 scopeid 0x20<link>
> ether 52:54:00:12:34:56 txqueuelen 1000 (Ethernet)
> RX packets 291 bytes 263098 (256.9 KiB)
> RX errors 0 dropped 0 overruns 0 frame 0
> TX packets 174 bytes 15608 (15.2 KiB)
> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>
> lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
> inet 127.0.0.1 netmask 255.0.0.0
> inet6 ::1 prefixlen 128 scopeid 0x10<host>
> loop txqueuelen 1 (Local Loopback)
> RX packets 0 bytes 0 (0.0 B)
> RX errors 0 dropped 0 overruns 0 frame 0
> TX packets 0 bytes 0 (0.0 B)
> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>
> # lsmod | grep virt
> virtio_net 24168 0
> virtio_pci 14583 0
> virtio_ring 12099 2 virtio_net,virtio_pci
> virtio 6188 2 virtio_net,virtio_pci
>
> (qemu) info network
> virtio-net-pci.0:
> index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:12:34:56
> \ hostnet0: index=0,type=user,net=10.0.2.0,restrict=off
>
> Thanks a lot!
>
> Bruno



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