[Xen-devel] Retry 2: Use i386 swiotlb code in lib/swiotlb-xen.c [1/2]

["Langsdorf, Mark" <mark.langsdorf@xxxxxxx>]

Move the arch/i386/kernel/swiotlb.c code to lib/swiotlb-xen.c
code in order to simplify maintenance of Xen in the future.

The first patch simplies moves the code to lib/swiotlb-xen.c;
the second patch adds the necessary changes to the Xen code
base to allow x86_64 systems to boot with SWIOTLB and the
dma_ops framework.

Signed-off-by: Mark Langsdorf <mark.langsdorf@xxxxxxx>



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