IOMMU_PAGE_MASK    28 arch/powerpc/include/asm/iommu.h #define IOMMU_PAGE_MASK(tblptr) (~((1 << (tblptr)->it_page_shift) - 1))
IOMMU_PAGE_MASK   363 drivers/iommu/amd_iommu_types.h #define IOMMU_PAGE_MASK (((1ULL << 52) - 1) & ~0xfffULL)