How to write a zIPL section in IPL2 record on a raw disk

[Mike Stramba]

I have a CKD file, created with the Hercules dasdinit program.

It's a  (hercules) 3350 uncompressed file.

I've put a small "hello world" IPL program on it, and it works fine with Hercules

When I try to run it with qemu-system-s390x I get :

LOADPARM=[        ]
Using virtio-blk.
Using guessed DASD geometry.
Using ECKD scheme (block size  4096), CDL
No zIPL section in IPL2 record.   <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
zIPL load failed.
Could not find a suitable boot device (none specified)
Failed to load OS from hard disk

The qemu script is :

qemu-system-s390x -m 16 -drive format=raw,file=test-ipl.3350.un,if=virtio -nographic

I found this link re:  the zipl command.

https://www.ibm.com/docs/en/linux-on-systems?topic=u-modes-syntax-overview

Where is that command   and  / or its source ?

Mike