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SubjectRe: [PATCH 2/6] iommu/amd: Implement DOMAIN_ATTR_GEOMETRY attribute
On Fri, Jan 27, 2012 at 3:03 PM, Joerg Roedel <> wrote:
> Note that only the read-side is handled by the core. An IOMMU driver may
> decide to implement a write-side for the geometry which would be not in
> the core then. Having a dedicated function for the write-side does not
> make sense because (for now) there is only one upcoming driver requiring
> this.

I'd still go with a type-safe interface here, but maybe it's only me.

> I think dedicated functions also make the API harder to use because a
> developer first needs to find out if a property is read/written by a
> dedicated function or the set/get-attr interface.

I'm not so sure how would drivers use these "hardware-specific api
attr extensions" in general.

Is the intention that only hardware-specific drivers will use them ? I
guess that generic drivers won't be able to use them, because their
behavior will not be well-defined across all hardware implementations.


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