Hello Alex, As mentioned recently, I can reproduce an emulation failure on POWER5 with PR KVM on openSUSE Factory a few seconds after reset: $ uname -a Linux power5 3.4.0-10-ppc64 #1 SMP Wed May 23 13:59:25 UTC 2012 (a3c5f2c) ppc64 ppc64 ppc64 GNU/Linux # ppc-softmmu/qemu-system-ppc -enable-kvm -nographic >> ============================================================= >> OpenBIOS 1.0 [May 30 2012 16:55] >> Configuration device id QEMU version 1 machine id 2 >> CPUs: 1 >> Memory: 128M >> UUID: 00000000-0000-0000-0000-000000000000 >> CPU type PowerPC,750 Welcome to OpenBIOS v1.0 built on May 30 2012 16:55 Trying hd:,\\:tbxi... Trying hd:,\ppc\bootinfo.txt... No valid state has been set by load or init-program 0 > reset-all >> ============================================================= >> OpenBIOS 1.0 [May 30 2012 16:55] >> Configuration device id QEMU version 1 machine id 2 >> CPUs: 1 >> Memory: 128M >> UUID: 00000000-0000-0000-0000-000000000000 >> CPU type PowerPC,750 Welcome to OpenBIOS v1.0 built on May 30 2012 16:55 Trying hd:,\\:tbxi... Trying hd:,\ppc\bootinfo.txt... No valid state has been set by load or init-program 0 > KVM: unknown exit, hardware reason 80893020 NIP 00000700 LR fff19d24 CTR fff19d04 XER 20000000 MSR 00000000 HID0 00000000 HF 00000000 idx 1 TB 00000000 00000000 DECR 00000000 GPR00 0000000000000004 0000000007df7e10 0000000000000000 0000000080893020 GPR04 00000000fffb3f80 0000000000000000 0000000000000000 0000000000000000 GPR08 0000000000000000 00000000fffb0000 00000000fffb4710 0000000000000000 GPR12 0000000000000000 0000000000000000 00000000fffb3f8c 00000000fff2f7dc GPR16 00000000fff2f7ee 00000000fffb4710 00000000fff2ef81 0000000000000009 GPR20 00000000fff2f7cf 00000000fff2ef81 00000000fff2ef6f 00000000fff2eeef GPR24 00000000fff2ef77 00000000fffb3630 000000000000000d 0000000007c5a888 GPR28 0000000000000008 0000000000000001 0000000007c5b090 00000000fff44e54 CR 42000044 [ G E - - - - G G ] RES ffffffff FPR00 0000000000000000 0000000000000000 0000000000000000 0000000000000000 FPR04 0000000000000000 0000000000000000 0000000000000000 0000000000000000 FPR08 0000000000000000 0000000000000000 0000000000000000 0000000000000000 FPR12 0000000000000000 0000000000000000 0000000000000000 0000000000000000 FPR16 0000000000000000 0000000000000000 0000000000000000 0000000000000000 FPR20 0000000000000000 0000000000000000 0000000000000000 0000000000000000 FPR24 0000000000000000 0000000000000000 0000000000000000 0000000000000000 FPR28 0000000000000000 0000000000000000 0000000000000000 0000000000000000 FPSCR 00000000 SRR0 fff19d48 SRR1 00000030 PVR 00080301 VRSAVE 00000000 SPRG0 07e00000 SPRG1 07df75f0 SPRG2 22000048 SPRG3 00000000 SPRG4 00000000 SPRG5 00000000 SPRG6 00000000 SPRG7 00000000 SDR1 07e00000 Message from syslogd@power5 at Jun 15 14:48:11 ... kernel:kvmppc_emulate_mmio: emulation failed (4bfff991) dmesg has this: Couldn't emulate instruction 0xffffffff (op 63 xop 1023) kvmppc_emulate_mmio: emulation failed (4bfff991) My first steps with PowerKVM. Any advice for debugging this? Thanks, Andreas -- SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html