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xen/ia64 with the P2M/VP model pseudo physical address(gpaddr) is fully virtualized so it defines xen_features(XENFEAT_auto_translated_physmap) = 1. In this case page_to_phys(page) should return pseudo physical address like pfn_to_mfn() and its families. However dma is not virtualized, it can't be used for pci-dma-xen.c, swiotlb.c. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>