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Date: Tue, 26 Jan 2010 08:42:30 -0600
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: [Qemu-devel] Re: KVM call agenda for Jan 26
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To: Avi Kivity <avi@redhat.com>
Cc: Chris Wright <chrisw@redhat.com>, Alexander Graf <agraf@suse.de>, kvm@vger.kernel.org, qemu-devel@nongnu.org

On 01/26/2010 08:37 AM, Avi Kivity wrote:
> People who use discovery tools are probably setting up a migration 
> cluster.  They aren't going to use -cpu host.

BTW, it might be neat to introduce a qemu command line that runs a 
monitor command and exits without creating a VM.  We could then 
introduce a info cpucap command that dumped all of the supported CPU 
features.

Someone setting up a migration cluster would then run qemu -monitor 
command="info cpucap", collect the results, compute an intersection, and 
then use that to generate a -cpu flag.  In fact, providing a tool that 
parsed a bunch of those outputs and generated a -cpu flag would be a 
pretty nice addition.

>>
>> Oh, I was under the impression that the tool was meant to be software 
>> agnostic.  IOW, here are all the virt features your hardware supports.
>
> That's /proc/cpuinfo, we should just extend it, maybe that's what Alex 
> meant, but I'd like to see something more capable.

I definitely think extending /proc/cpuinfo or introducing a 
/proc/virtinfo would be a good idea regardless of any tool we introduce.

Regards,

Anthony Liguori