qemu-system-sparc64 not booting install of debian sparc64

[Connor McLaughlan <cont6pro3@gmail.com>]

Hi,

i am trying to run debian sparc64 on qemu to have another possibility
to test, run and compile stuff.
However i can not get the recent iso to create a running debian
installation on qemu.

I am using an x86_64 machine with debian buster.
Qemu version is:
EMU emulator version 3.1.0 (Debian 1:3.1+dfsg-8+deb10u5) Copyright (c)
2003-2018 Fabrice Bellard and the QEMU Project developers

I am doing pretty standard stuff, that works for other systems:

First, i create an image file:
qemu-img create -f qcow2 debian-sparc64.qcow2 60G

Then i run qemu with the debian iso to boot, partition and install debian:
qemu-system-sparc64 -nographic -m 4G -hda ./debian-sparc64.qcow2
-cdrom ./debian-10.0.0-sparc64-NETINST-1.iso

This works how  it should right to the end, at which the first strange
thing happens:

The system is going down NOW!
Sent SIGTERM to all processes ? [16300.898259] twice on console to
return to the boot prom [16300.899563] ---[ end Kernel panic - not
syncing: Reboot failed! ]---

But as this is right at the end, i think it should be ok.

Then when i try to boot the freshly installed system, grub comes up
and tries to boot which leads directly to this exception:
error: canonicalise devname failed.
Unhandled Exception 0x0000000000000030 PC = 0x00000000ffd0f16c NPC =
0x00000000ffd0f170 Stopping execution

Also within the grub console i am unable to execute "ls" to list
attached drives:

grub> ls
Unhandled Exception 0x0000000000000030 PC = 0x00000000ffd0f16c NPC =
0x00000000ffd0f170 Stopping execution


Has anyone actually got it running and some idea what is wrong?

Regards,
Connor