[Xen-devel] [PATCH v8 2/4] xen: iommu: Define PAGE_{SHIFT, SIZE, ALIGN, MASK)_64K

[Julien Grall <julien.grall@xxxxxxxxxx>]

Also add IOMMU_PAGE_* helper macros to help creating PAGE_* defines.

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>

---
    Changes in v7:
        - Drop pointless parentheses

    Changes in v6:
        - Patch added
---
 xen/include/xen/iommu.h |   15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/xen/include/xen/iommu.h b/xen/include/xen/iommu.h
index 2ec7834..8eb764a 100644
--- a/xen/include/xen/iommu.h
+++ b/xen/include/xen/iommu.h
@@ -35,10 +35,19 @@ extern bool_t iommu_hap_pt_share;
 extern bool_t iommu_debug;
 extern bool_t amd_iommu_perdev_intremap;
 
+#define IOMMU_PAGE_SIZE(sz) (1UL << PAGE_SHIFT_##sz)
+#define IOMMU_PAGE_MASK(sz) (~(u64)0 << PAGE_SHIFT_##sz)
+#define IOMMU_PAGE_ALIGN(sz, addr)  (((addr) + ~PAGE_MASK_##sz) & 
PAGE_MASK_##sz)
+
 #define PAGE_SHIFT_4K       (12)
-#define PAGE_SIZE_4K        (1UL << PAGE_SHIFT_4K)
-#define PAGE_MASK_4K        (((u64)-1) << PAGE_SHIFT_4K)
-#define PAGE_ALIGN_4K(addr) (((addr) + PAGE_SIZE_4K - 1) & PAGE_MASK_4K)
+#define PAGE_SIZE_4K        IOMMU_PAGE_SIZE(4K)
+#define PAGE_MASK_4K        IOMMU_PAGE_MASK(4K)
+#define PAGE_ALIGN_4K(addr) IOMMU_PAGE_ALIGN(4K, addr)
+
+#define PAGE_SHIFT_64K          (16)
+#define PAGE_SIZE_64K           IOMMU_PAGE_SIZE(64K)
+#define PAGE_MASK_64K           IOMMU_PAGE_MASK(64K)
+#define PAGE_ALIGN_64K(addr)    IOMMU_PAGE_ALIGN(64K, addr)
 
 int iommu_setup(void);
 
-- 
1.7.10.4


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