Re: [PATCH v4 2/7] iommu/core: split mapping to page sizes assupported by the hardware

[KyongHo Cho]

On Sat, Nov 12, 2011 at 11:04 AM, Stepan Moskovchenko
<stepanm@xxxxxxxxxxxxxx> wrote:
> Yes, the scatterlist is allowed to have different page sizes. But, they are
> required to have a length that is a multiple of 4K. If a page in the list is

An element in scatterlist may not be aligned by 4K but I think IOMMU driver
must round it up to 4K if IOMMU API support iommu_map_range().

The first element in scatterlist is often not aligned by 4K if the pages are
provided from userspace. Length + offset of  the element must be
aligned by 4K, though.

Thank you,
KyongHo.
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