[Xen-devel] [PATCH 02/10] xen: arm: Add zeroeth level page table macros and defines

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 xen/include/asm-arm/page.h |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/xen/include/asm-arm/page.h b/xen/include/asm-arm/page.h
index 41e9eff..6317090 100644
--- a/xen/include/asm-arm/page.h
+++ b/xen/include/asm-arm/page.h
@@ -337,7 +337,15 @@ static inline int gva_to_ipa(vaddr_t va, paddr_t *paddr)
 #define second_table_offset(va) TABLE_OFFSET(second_linear_offset(va))
 #define third_table_offset(va)  TABLE_OFFSET(third_linear_offset(va))
 
-#define clear_page(page)memset((void *)(page), 0, PAGE_SIZE)
+#ifdef CONFIG_ARM_64
+#define ZEROETH_SHIFT  (FIRST_SHIFT + LPAE_SHIFT)
+#define ZEROETH_SIZE   (1u << ZEROETH_SHIFT)
+#define ZEROETH_MASK   (~(ZEROETH_SIZE - 1))
+#define zeroeth_linear_offset(va) ((va) >> ZEROETH_SHIFT)
+#define zeroeth_table_offset(va)  TABLE_OFFSET(zeroeth_linear_offset(va))
+#endif
+
+#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
 
 #define PAGE_ALIGN(x) (((x) + PAGE_SIZE - 1) & PAGE_MASK)
 
-- 
1.7.2.5


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