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SubjectRe: [PATCH 2/5] iommu/amd: Implement DOMAIN_ATTR_GEOMETRY attribute
On Thu, Jan 19, 2012 at 04:46:13PM +0100, Laurent Pinchart wrote:
> > +struct iommu_domain_geometry {
> > + u64 aperture_start; /* First address that can be mapped */
> > + u64 aperture_end; /* Last address that can be mapped */
>
> Would it make sense to use a platform-dependent type that represents physical
> addresses instead of u64 ?

Well, u64 is a catch-all datatype which should suit all drivers. Is this
a problem at ARM? We can also go the more complicated way of introducing
an iova_addr_t or something. But if possible I would like to avoid that.

> > @@ -62,7 +70,8 @@ enum iommu_attr {
> > * @unmap: unmap a physically contiguous memory region from an iommu
> > domain * @iova_to_phys: translate iova to physical address
> > * @domain_has_cap: domain capabilities query
> > - * @commit: commit iommu domain
> > + * @domain_get_attr: Query domain attributes
> > + * @domain_set_attr: Change domain attributes
>
> This belongs to the previous patch.

Right, I change that.


Joerg

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AMD Operating System Research Center

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General Managers: Alberto Bozzo
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