Re: [Xen-devel] [RFC PATCH 2/9] iommu: Add ability to map/unmap the number of pages

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 15.03.17 at 21:05, <olekstysh@xxxxxxxxx> wrote:
> From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
> 
> Extend the IOMMU code with new APIs and platform callbacks.
> These new map_pages/unmap_pages API do almost the same thing
> as existing map_page/unmap_page ones except the formers can
> handle the number of pages. So do new platform callbacks.
> 
> Currently, this patch requires to modify neither
> existing IOMMU drivers nor P2M code.
> But, the patch might be rewritten to replace existing
> single-page stuff with the multi-page one followed by modifications
> of all related parts.

Yes please. However, unless you strictly need a page count, please
instead use an "order" parameter. Doing that has been on my todo
list for quite a while.

Jan


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