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Re: [Xen-devel] [PATCH v12 1/9] iommu: introduce the concept of DFN...
Hi Paul,
On 09/27/2018 03:33 PM, Paul Durrant wrote:
...meaning 'device DMA frame number' i.e. a frame number mapped in the IOMMU
(rather than the MMU) and hence used for DMA address translation.
This patch is a largely cosmetic change that substitutes the terms 'gfn'
and 'gaddr' for 'dfn' and 'daddr' in all the places where the frame number
or address relate to a device rather than the CPU.
The parts that are not purely cosmetic are:
- the introduction of a type-safe declaration of dfn_t and definition of
INVALID_DFN to make the substitution of gfn_x(INVALID_GFN) mechanical.
- the introduction of __dfn_to_daddr and __daddr_to_dfn (and type-safe
variants without the leading __) with some use of the former.
Subsequent patches will convert code to make use of type-safe DFNs.
Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
For the ARM bits:
Acked-by: Julien Grall <julien.grall@xxxxxxx>
Cheers,
--
Julien Grall
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