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Re: [Qemu-discuss] Trying to test qemu-system-s390

From: Mike Lovell
Subject: Re: [Qemu-discuss] Trying to test qemu-system-s390
Date: Wed, 06 Jun 2012 13:21:32 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1

On 06/06/2012 01:15 PM, Jorge Ventura wrote:
I am a newbie with qemu and I am starting with s390x. This is because the idea is to test KVM in a z9 mainframe already

I am trying to use qemu-system-s390 (version 1.1.0-1 emulated on x86_64) with a linux image and root filesystem at initramfs what means that I don't use any dasd or filesystem at this time, the plan is to increase the complexity progressively.

The command I am using is:

$ bin/qemu-system-s390x -m 4096 -kernel bzImage -initrd initramfs_data.cpio.gz

What I understand as 4Gb memory, kernel image is the file bzImage and the initrd the file initramfs_data.cpio.gz, all tested under hercules (I didn't test directly under z9 yet) and working perfectly.

After the command above, I get a window with a prompt (qemu) and that is all. What I have to do at this point to continue the linux boot ???

i've never used the s390x target myself but a co-worker recently did. i think the trick is that usually a z-series usually uses a serial port for the console and not a graphical display and so you need to interact with the virtual serial port qemu uses. try pressing ctrl-alt-2 after you have started the guest. if that doesn't show you anything try using other numbers like 1 or 3. the (qemu) prompt is for the qemu monitor.


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