Re: [Xen-devel] [PATCH v7 07/10] xen/common: move the memory_mapping DOMCTL hypercall to common code

[Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>]

On Tue, 2014-05-06 at 09:40 +0100, Jan Beulich wrote:
> >>> On 05.05.14 at 17:54, <avanzini.arianna@xxxxxxxxx> wrote:
> >     v7:
> >         - Change the name of tmp_rc to rc. Also, do not uselessly 
> > initialize it.
> >         - ifdef out the invocation of memory_type_changed() to be called 
> > only
> >           if the architecture is x86 instead of adding an useless empty stub
> >           for ARM.
> 
> Was this requested by one of the ARM maintainers?

I don't think it was me.

> Do memory types not exist at all on ARM?

This is types in "MTRR" sense rather than p2m type sense I think? These
are part of the PT mappings, so I would expect something like this to
probably be needed for any IOMMU stuff at some point.

>  I would have expected the function to be
> empty only until someone would get to implement it properly...

Me too.

>  Other
> architectures (ia64 at least, since that's the one I know next best after
> x86) would surely have needed this too.
> 
> Jan
> 



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