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Re: [Qemu-devel] [PULL 09/20] s390x/ipl: Remove redundant usage of gr7

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PULL 09/20] s390x/ipl: Remove redundant usage of gr7
Date: Wed, 18 May 2016 12:37:04 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0

On 18/05/2016 12:09, Christian Borntraeger wrote:
>> > This probably breaks reboot after migration from 2.6.
>> > 
>> > If that's fine, all the better. :)
> Our BIOS is in RAM and usually overwritten by the guest.
> On reboot this is reloaded from whatever BIOS is on the target,
> so migration should still work.

Indeed if the BIOS is not in its own RAMBlock then it's fine.



> I have verified that migration between 2.4 and 2.6  plus these
> patches forth and back still allows to reboot.
> In other words the bios and the code in ipl.c have to be updated
> in lockstep, then everything is fine.

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