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    SubjectRe: [PATCH 00 of 14] swiotlb/x86: lay groundwork for xen dom0 use of swiotlb
    On Thu, 18 Dec 2008 12:17:54 -0600
    Becky Bruce <> wrote:

    > > Can you be more specific? What architecture is plan to use highmem
    > > support in swiotlb?
    > 32-bit powerpc needs this support - I was actually about to push a
    > similar set of patches. We have several processors that support 36
    > bits of physical address space and do not have any iommu capability.
    > The rest of the kernel support for those processors is now in place,
    > so swiotlb is the last piece of the puzzle for that to be fully
    > functional. I need to take a closer look at this series to see
    > exactly what it's doing and how it differs from what I've been testing.

    Ah, thanks,

    Then I accept that highmem support in lib/swiotbl.c is generically
    useful and we have to live with the ugly complication due to it.

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