[Qemu-devel] Re: KVM call agenda for Jan 26

[Anthony Liguori]

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