Re: [Xen-devel] [PATCH v8 4/4] xen/arm: grant: Add another entry to map MFN 1:1 in dom0 p2m

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2014-05-21 at 14:54 +0100, Julien Grall wrote:
> On 05/21/2014 02:51 PM, Ian Campbell wrote:
> > On Wed, 2014-05-21 at 14:42 +0100, Julien Grall wrote:
> > 
> >>> Is gnttab the only possible user?
> >>
> >> For ARM yes.
> > [...]
> >> The iommu_map_page could be reuse more generically in long-term. Using
> >> p2m_grant_map_{ro,rw} would be confusing here.
> > 
> > BTW, those statements contradict each other.
> 
> Right. This function could also be used if we want to support per-IOMMU
> p2m rather than sharing with the CPU.

I suspected as much, thanks.

I don't know how likely that is to be a thing which happens.

(I'm not sure what the implications of that are for either the comment
or the p2m type name...)

Ian.





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