We will leverage this macro in the NVMe driver, which needs to know the configured IOMMU page shift to properly configure its device's page size.
Signed-off-by: Nishanth Aravamudan <n...@linux.vnet.ibm.com> --- Given this is available, it seems reasonable to expose -- and it doesn't really make sense to make the driver do a log2 call on the existing IOMMU_PAGE_SIZE() value. diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h index ca18cff..6fdf857 100644 --- a/arch/powerpc/include/asm/iommu.h +++ b/arch/powerpc/include/asm/iommu.h @@ -36,6 +36,7 @@ #define IOMMU_PAGE_MASK_4K (~((1 << IOMMU_PAGE_SHIFT_4K) - 1)) #define IOMMU_PAGE_ALIGN_4K(addr) _ALIGN_UP(addr, IOMMU_PAGE_SIZE_4K) +#define IOMMU_PAGE_SHIFT(tblptr) (tblptr)->it_page_shift #define IOMMU_PAGE_SIZE(tblptr) (ASM_CONST(1) << (tblptr)->it_page_shift) #define IOMMU_PAGE_MASK(tblptr) (~((1 << (tblptr)->it_page_shift) - 1)) #define IOMMU_PAGE_ALIGN(addr, tblptr) _ALIGN_UP(addr, IOMMU_PAGE_SIZE(tblptr)) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
