Re: [Qemu-devel] [libvirt] [PATCH 0/9] i386: query-cpu-model-expansion test script

[David Hildenbrand]

>> Also think about "query-cpu-model-expansion model=host type=static",
>> which will primarily be used by libvirt on s390x. There is no way to
>> expand this into a static cpu model. Faking anything will just hide errors.
> 
> Yes, static expansion of host model must always return an error
> if it's not possible to expand.
> 
>>
>> If "host" can't be expanded, QEMU has to be treated like there is no CPU
>> model support (as for older QEMU versions).
> 
> OK. I will propose a patch updating the query-cpu-model-expansion
> documentation to be more explicit about it.

The only real alternative I see would be disabling the query-cpu-model-*
interface completely if KVM support is not available.

This would however mean, that the same QEMU binary would have the
interface when running under TCG, but not when running under KVM on an
old KVM version.

That also doesn't really feel right, or what do you think?

-- 

David