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Re: [libvirt] [PATCH 0/4] allow OVMF users to disable qemu's "-boot strict=on"



On 01/22/2014 12:45 PM, Daniel P. Berrange wrote:
> On Wed, Jan 22, 2014 at 01:33:18AM +0100, Laszlo Ersek wrote:
>> Recently,
>>
>>   commit 96fddee322c7d39a57cfdc5e7be71326d597d30a
>>   Author: Laine Stump <laine laine org>
>>   Date:   Mon Dec 2 14:07:12 2013 +0200
>>
>>       qemu: add "-boot strict" to commandline whenever possible
>>
>> introduced a regression for OVMF guests. The symptoms and causes are
>> described in patch 3/4, and in
>>
>>   https://bugzilla.redhat.com/show_bug.cgi?id=1056258
>>
>> Let's allow users to opt-out of "-boot strict=on" while preserving it as
>> default.
> I don't really get from that bug description why this can't be
> made to work as desired in OVMF. It seems like its is just a
> bug in the OVMF impl that it doesn't work.

I was on the verge of making that same comment in question form. From
the information in the patches and the BZ, it sounds like either "--boot
strict" is implemented incorrectly for OVMF, or OVMF doesn't do the
proper thing with the "HALT".

What does OVMF do with bootable devices that aren't given a specific
boot order? For seabios, those devices are all on the boot list
following those with specific orders; this is what necessitates --boot
strict. The behavior of the option should be consistent regardless of
BIOS choice.


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