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Re: [Qemu-devel] [Qemu PATCH v2] add a boot option to do strict boot

From: Eric Blake
Subject: Re: [Qemu-devel] [Qemu PATCH v2] add a boot option to do strict boot
Date: Tue, 22 Jan 2013 09:00:30 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2

On 01/22/2013 08:52 AM, Amos Kong wrote:

>>> Libvirt will need to expose an attribute that lets the user control
>>> whether to use this new option; how do we probe via QMP whether the
>>> new
>>> -boot strict=on command-line option is available?
>> Hi all,
>> How about add new info/query command?
>> (hmp) info strict-boot
>>       on
>> (qmp) {"execute": "query-strict-boot"}
>>       {"return": {"state": true}}
> It might be not a good solution, I already updated qemu-options.hx,
> we can check help message to know if this new option is added or not.

Having libvirt probe the -help output is out of the question.  We
already declared that for qemu 1.3 and beyond, ALL command line behavior
must ALSO be probe-able via QMP.  I think Anthony had a trick for
testing for existence of various command line options without needing to
add a new query-strict-boot command, but I don't remember what that
trick was.

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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