Re: [Xen-devel] [PATCH v12 05/11] x86/mm: add HYPERVISOR_memory_op to acquire guest resources

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 19.10.17 at 16:49, <Paul.Durrant@xxxxxxxxxx> wrote:
>> > I'd prefer to make the whole thing x86-only since that's the only platform
>> on which I can test it, and indeed the code used to be x86-only. Jan objected
>> to this so all I'm trying to achieve is that it builds for ARM. Please can 
>> you and
>> Jan reach agreement on where the code should live and how, if at all, it
>> should be #ifdef-ed?
>> 
>> I am quite surprised of "it is tools-only" so it is fine to not protect
>> it even if it is x86 only. That's probably going to bite us in the future.
>> 
> 
> So, this appears to have reached an impasse. I don't know how to proceed 
> without having to also fix priv mapping for x86, which is a yak far too large 
> for me to shave at the moment.

Julien,

why is it that you are making refcounting on p2m insertion / removal
a requirement for this series? We all know it's not there right now
(and similarly also not for the IOMMU, which might affect ARM as well
unless you always use shared page tables), and it's - as Paul validly
says - unrelated to his series.

Jan


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