Re: [Xen-devel] [PATCH v3] iommu / p2m: add a page_order parameter to iommu_map/unmap_page()...

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Paul Durrant [mailto:paul.durrant@xxxxxxxxxx]
> Sent: Wednesday, October 31, 2018 11:22 PM
> 
> ...and re-name them to iommu_map/unmap() since they no longer
> necessarily
> operate on a single page.
> 
> The P2M code currently contains many loops to deal with the fact that,
> while it may be require to handle page orders greater than 0, the
> IOMMU map and unmap functions do not.
> This patch adds a page_order parameter to those functions and
> implements
> the necessary loops within. This allows the P2M code to be substantially
> simplified.
> 
> This patch also adds emacs boilerplate to xen/iommu.h to avoid tabbing
> problem.
> 
> NOTE: This patch does not modify the underlying vendor IOMMU
>       implementations to deal with more than a single page at once.
> 
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>

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