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Date: Wed, 20 Jan 2010 20:18:30 -0500
From: john cooper <john.cooper@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH] Add definitions for current cpu models..
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To: Chris Wright <chrisw@sous-sol.org>
Cc: "Przywara, Andre" <Andre.Przywara@amd.com>, KVM list <kvm@vger.kernel.org>, john.cooper@redhat.com, qemu-devel@nongnu.org

Chris Wright wrote:
> * Daniel P. Berrange (berrange@redhat.com) wrote:
>> To be honest all possible naming schemes for '-cpu <name>' are just as
>> unfriendly as each other. The only user friendly option is '-cpu host'. 
>>
>> IMHO, we should just pick a concise naming scheme & document it. Given
>> they are all equally unfriendly, the one that has consistency with vmware
>> naming seems like a mild winner.
> 
> Heh, I completely agree, and was just saying the same thing to John
> earlier today.  May as well be -cpu {foo,bar,baz} since the meaning for
> those command line options must be well-documented in the man page.

I can appreciate the concern of wanting to get this
as "correct" as possible.  But ultimately we just
need three unique tags which ideally have some relation
to their associated architectures.  The diatribes
available from /proc/cpuinfo while generally accurate
don't really offer any more of a clue to the model
group, and in their unmodified form are rather unwieldy
as command line flags.

> This is from an EVC kb article[1]:

Here is a pointer to a more detailed version:

   http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1003212


We probably should also add an option to dump out the
full set of qemu-side cpuid flags for the benefit of
users and upper level tools.

-john

-- 
john.cooper@redhat.com