On Fri, Feb 10, 2017 at 6:29 PM, Thomas Huth <th...@redhat.com> wrote: > On 10.02.2017 14:49, Thomas Huth wrote: >> Hi, >> >> is it just me, or could it be that the sun4v machine is currently broken? >> I get the following error when I try to run QEMU with this machine: >> >> qemu-system-sparc64 -nographic -M sun4v >> qemu: fatal: Trap 0x0010 while trap level (6) >= MAXTL (6), Error state >> pc: 0000000000000200 npc: 0000000000000204 >> %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: 00000014 ccr: 44 (icc: -Z-- xcc: -Z--) asi: 00 tl: 6 pil: 0 gl: 8 >> tbr: 0000000000000000 hpstate: 0000000000000004 htba: 0000000000000000 >> cansave: 6 canrestore: 0 otherwin: 0 wstate: 0 cleanwin: 6 cwp: 7 >> fsr: 0000000000000000 y: 0000000000000000 fprs: 0000000000000000 >> >> Aborted (core dumped) >> >> It works for when I use an older version of QEMU (version 2.7)... > > FWIW, it's also still working when I use QEMU 2.8, so this must be a > recent regression...
Oh. This is surprising. Sun4v practically wasn't implemented before my niagara series. So, OpenBIOS worked because -M sun4v was like -M sun4u with some sun4v instructions. Now sun4v is closer to a real sun4v - it has sun4v MMU, so OpenBIOS is not compatible with it anymore. The proper fix would be adding sun4v support to OpenBIOS, but it may take some time. -- Regards, Artyom Tarasenko SPARC and PPC PReP under qemu blog: http://tyom.blogspot.com/search/label/qemu
