Re: [Qemu-devel] [PATCH 00/17] s390x emulation support

[Alexander Graf <agraf@suse.de>]

On 03/24/2011 04:58 PM, Alexander Graf wrote:
> We've had support for running s390x guests with KVM for a
> while now. This patch set also enables support for running
> s390x guests in system as well as linux-user mode in emulation!
>
> Within this scope, I again want to stress that this is _not_
> supposed to replace Hercules - the s390 emulator - in any way.
> The only target supported by qemu is Linux. You can only run
> Linux applications with linux-user emulation and Linux guest OSs
> with the system emulation. All the device logic (and 24 bit mode)
> for running legacy stuff is missing. Use Hercules for those!
>
> I have successfully run the following guest OSs:
>
>    - SUSE Linux Enterprise Server 11 SP1
>    - Debian Lenny
>
> Both of which work just fine on x86_64 and ppc hosts. Other hosts
> should also work. The only thing that did not work for me is network.
> Somehow networking only works with KVM enabled, so there is probably
> some bug involved still.
>
> Either way - rejoice! As with this patch set you can finally fulfill
> your mainframe desires on your local workstation. And - most importantly -
> finally test patches to virtio against s390!
>
> For images, I'm hoping for Aurelien to provide Debian images that run
> in qemu. Other distributions only provide S390x target support in their
> enterprise variants, keeping me from redistributing images :(.
>
> If you're trying to get things rolling yourself, make sure to use a
> recent kernel that has support for the virtio architecture and virtio
> console support - otherwise you won't see output.
>
> The linux user mode emulation part only support 64bit binaries, so
> running Debian binaries with that one is out of question for now. Use
> the system emulation mode if you really need to run Debian binaries.

I forgot the most important piece of information:

   git://repo.or.cz/qemu/agraf.git s390-tcg-v1



Alex