It's difficult to tell as you haven't posted your complete command line, however it looks as if you're missing the path to the rom images:
https://qemu.weilnetz.de/doc/qemu-doc.html#Sparc64-System-emulator https://wiki.qemu.org/Documentation/Platforms/SPARC#Compatibility ATB, Mark. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1670170 Title: `qemu-system-sparc64 -M Niagara` Aborted (core dumped) Status in QEMU: Fix Released Bug description: > qemu-system-sparc64 -M Niagara qemu: fatal: Trap 0x0064 while trap level (6) >= MAXTL (6), Error state pc: 0000000000004c80 npc: 0000000000004c84 %g0-3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %g4-7: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %o0-3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %o4-7: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %l0-3: 0000000007f00000 000001ff00000000 000001fff0080000 0000000000000000 %l4-7: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %i0-3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %i4-7: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f00: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f24: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f32: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f40: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f48: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f56: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 pstate: 00000414 ccr: 44 (icc: -Z-- xcc: -Z--) asi: 00 tl: 6 pil: 0 cansave: 6 canrestore: 0 otherwin: 0 wstate: 0 cleanwin: 6 cwp: 7 fsr: 0000000000000000 y: 0000000000000000 fprs: 0000000000000000 Aborted (core dumped) > qemu-system-sparc64 -M help Supported machines are: Niagara Sun4v platform, Niagara none empty machine sun4u Sun4u platform (default) sun4v Sun4v platform > qemu-system-sparc64 -version QEMU emulator version 2.8.0(Virtualization:Staging / SLE_12_SP2) from https://build.opensuse.org/package/show/Virtualization:Staging/qemu on openSUSE Leap 42.2. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1670170/+subscriptions