From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexander Graf <agraf@suse.de>
Date: Thu, 28 Jun 2012 13:28:51 +0000
Subject: Re: -M g3beige KVM emulation failure on reset
Message-Id: <4FEC5C13.9090201@suse.de>
List-Id: <kvm-ppc.vger.kernel.org>
References: <4FDB316D.5090900@suse.de>
In-Reply-To: <4FDB316D.5090900@suse.de>
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To: kvm-ppc@vger.kernel.org

On 06/15/2012 02:58 PM, Andreas F=E4rber wrote:
> 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
>
>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D>>> 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
>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D>>> 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?

Hrm. I suppose we don't handle reset properly? :)

Does it work without KVM?


Alex