IBM Mainframe s390x can not PXE boot under MAAS direction

Dear MAAS team, I’m deploying IBM Mainframe LPAR but they are not able to PXE boot from the MAAS. I added LPAR to the MAAS as a new machine and I configured MAC address of the interface which performs PXE boot + set architecture s390x. Boot messages from the LPAR boot attempt are here: OpenID transaction in progress It looks like there are some problems with configuring BOOTIF. Could anyone suggest corrective actions? OS to install is Jammy 22.04 (both hwe and generic).

This is tracked in a bug report already: Bug #2112637 “MAAS does not set BOOTIF mac address for IBM s390s...” : Bugs : MAAS