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

[Avi Kivity <avi@redhat.com>]

On 01/26/2010 04:32 PM, Anthony Liguori wrote:
>>>> It would need to know which cpuid bits qemu supports.  Only qemu 
>>>> knows that.
>>>
>>> I'm not sure I understand why.  Can you elaborate?
>>>
>>
>> If qemu doesn't recognize -cpu qemu64,+nx, then no amount of hardware 
>> and kvm.ko support will allow the user to enable nx in a guest.
>
>
> Does -cpu host filter out flags that we don't know about?  I'm pretty 
> sure it doesn't.  Since we're planning on moving to -cpu host by 
> default for KVM, does it really matter?

People who use discovery tools are probably setting up a migration 
cluster.  They aren't going to use -cpu host.

>
> 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.

-- 
error compiling committee.c: too many arguments to function