From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@qumranet.com>
Subject: Re: [ANNOUNCE] kvm-75 release
Date: Sun, 14 Sep 2008 03:57:46 +0300
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References: <48C7D894.1060304@qumranet.com> <20080913210651.GA25649@psychosis.jim.sh>
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Cc: KVM list <kvm@vger.kernel.org>
To: Jim Paris <jim@jtan.com>
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Jim Paris wrote:
> Avi Kivity wrote:
>   
>> - restore option roms to their original content on reset
>>   - fixes extboot failures after reset
>>     
>
> It doesn't seem to work here:
>
> $ dmesg | grep kvm | tail -1
> [1649282.904413] loaded kvm module (kvm-75)
> $ sudo kvm | head -1
> QEMU PC emulator version 0.9.1 (kvm-75), Copyright (c) 2003-2008 Fabrice Bellard
> $ sudo /usr/bin/kvm -M pc -m 512 -smp 1 -name svn -boot c -drive file=/dev/mapper/raid1-svn,if=virtio,index=0,boot=on
>
> At GRUB, I hit "c" for a command prompt, then type "reboot".
>   

grub is probably booting via int 19 or jumping to the reset vector, so 
kvm doesn't see the reboot.  If that's the case, we can either implement 
the chipset's memory control registers properly and teach the bios to 
program them, or add a hack in the bios to trigger the copying without 
the full reset.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.