SunOS 5.8 64bit emulate SUNW, Ultra 2

[Weidemann, Maik (M-SO)]

Hello,

I try do emulate / virtualize a very old Sun Workstation Ultra 2 with a SunOs 5.8 with KVM/qemu.
As host system I use a Ubuntu 17.10 with the qemu packages from  http://ppa.launchpad.net/jacob/virtualisation/ubuntu.
The qemu Version is:
QEMU emulator version 2.11.0(Debian 1:2.11+dfsg-1ubuntu1~ppa0)

I tried to start a virtual machine with the default bios (Version: 1.1.git20161120-2). But I get this error message:
# qemu-system-sparc64 -nographic -drive unit=1,file=sun14_disk.raw,format=raw
OpenBIOS for Sparc64
set_property: NULL phandle
set_property: NULL phandle
Unhandled Exception 0x0000000000000030
PC = 0x00000000ffd0f6b8 NPC = 0x00000000ffd0f6bc
Stopping execution

I see that was some new commits at the git repository, so I clone the repo an build a new openbios-file (https://www.openbios.org/OpenBIOS#Building_OpenBIOS) an start the vm with this new bios. But I get also a error message:
# qemu-system-sparc64 -nographic -drive unit=1,file=sun14_disk.raw,format=raw -L . -bios openbios-builtin.elf 
Unhandled Exception 0x0000000000000030
PC = 0x00000000ffd21368 NPC = 0x00000000ffd2136c
Stopping execution

Is it even possible to emulate a Sun Sparc Ultra 2 with a SunOs 5.8 (64bit)?
SunOS satnw014 5.8 Generic_108528-06 sun4u sparc SUNW,Ultra-2

Best regards
Maik