From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: regression in v3.9? a guest stuck in BIOS if emulate_invalid_guest_state=Y Date: Wed, 08 May 2013 10:29:57 +0200 Message-ID: <518A0D05.9040207@redhat.com> References: <5188CF8B.8040809@ce.jp.nec.com> <20130507103520.GL12349@redhat.com> <5188DFF7.1090808@ce.jp.nec.com> <20130507120611.GM12349@redhat.com> <518913BE.8060300@redhat.com> <5189C4D8.6060705@ce.jp.nec.com> <5189FFEB.9000503@ce.jp.nec.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Gleb Natapov , kvm@vger.kernel.org To: Jun'ichi Nomura Return-path: Received: from mail-we0-f177.google.com ([74.125.82.177]:47732 "EHLO mail-we0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752399Ab3EHIaC (ORCPT ); Wed, 8 May 2013 04:30:02 -0400 Received: by mail-we0-f177.google.com with SMTP id q58so1447907wes.8 for ; Wed, 08 May 2013 01:30:00 -0700 (PDT) In-Reply-To: <5189FFEB.9000503@ce.jp.nec.com> Sender: kvm-owner@vger.kernel.org List-ID: Il 08/05/2013 09:34, Jun'ichi Nomura ha scritto: > On 05/08/13 12:22, Jun'ichi Nomura wrote: >>> Il 07/05/2013 14:06, Gleb Natapov ha scritto: >>>> What is the output of "virsh qemu-monitor-command vm12 --hmp x/i $pc" >>>> when it hangs? >> >> # virsh qemu-monitor-command vm12 --hmp x/4i \$pc >> 0x00000000000c06ca: aam $0xa >> 0x00000000000c06cc: mov %ax,%bx >> 0x00000000000c06ce: mov %bh,%al >> 0x00000000000c06d0: aam $0xa >> >> # virsh qemu-monitor-command vm12 --hmp x/8b \$pc >> 00000000000c06ca: 0xd4 0x0a 0x89 0xc3 0x88 0xf8 0xd4 0x0a >> >> (qemu) x/8b $pc >> x/8b $pc >> 00000000000c0564: 0xd7 0x1f 0x24 0x7f 0x88 0xc4 0x88 0xd0 >> (qemu) >> (qemu) x/i $pc >> x/i $pc >> 0x00000000000c0564: xlat %ds:(%bx) Both of these sequences are found in sgabios. The second goes on as follows: popw %ds andb $0x7f, %al movb %al, %ah movb %dl, %al Thanks for the report! Paolo