[PATCH] ia64: sba_iommu update
This patch does a couple things: * Allows iommu page size different than PAGE_SIZE. This was largely done by Bjorn. The motivation for this is that sx1000 hardware officially only supports use of the iommu with a 4k page size. Thus the default is now 4k for sx1000 and PAGE_SIZE for zx1. * Cleanup the runtime statistics gathering such that we can turn it on for some info w/o impacting runtime performance.
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