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 available.
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.
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 ???