Re: [Qemu-devel] [Xen-devel] [PATCH RFC v2 4/4] xen/MSI: re-expose masking capability

[Jan Beulich]

>>> On 11.12.15 at 17:56, <address@hidden> wrote:
> On Fri, 2015-12-11 at 16:44 +0000, Stefano Stabellini wrote:
>>  
>> It is not possible to do this at runtime. I think we should do this at
>> compile time because in any case it is not supported to run a QEMU built
>> for a given Xen version on a different Xen version.
> 
> I am currently working pretty hard to make this possible in the future, it
> would be a shame to add another reason it wasn't possible at this stage.

And I don't think it's not possible - if anything, the infrastructure to
do so is just missing. I'm definitely not going to make this a build time
check, since I deem it very wrong namely when considering
--with-system-qemu (as in that case there shouldn't be any
dependency on the precise Xen tools versions in use - using plural
intentionally here to point out the possibility of multiple ones being
present).

Jan