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    SubjectRe: [PATCH 00 of 14] swiotlb/x86: lay groundwork for xen dom0 use of swiotlb

    * FUJITA Tomonori <> wrote:

    > 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.

    Great! And we of course want to make the best possible job here - so
    whenever you notice any area that could be done better and less
    intrusively, please mention it.


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