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    SubjectRe: [PATCH v4 2/7] iommu/core: split mapping to page sizes as supported by the hardware
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    On Sat, Nov 12, 2011 at 11:04 AM, Stepan Moskovchenko
    <stepanm@codeaurora.org> 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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