1 files changed, 28 insertions, 0 deletions

diff --git a/arch/x86/include/asm/pgtable-3level-defs.h b/arch/x86/include/asm/pgtable-3level-defs.h
new file mode 100644
index 000000000000..c05fe6ff3720
--- /dev/null
+++ b/arch/x86/include/asm/pgtable-3level-defs.h
@@ -0,0 +1,28 @@
+#ifndef ASM_X86__PGTABLE_3LEVEL_DEFS_H
+#define ASM_X86__PGTABLE_3LEVEL_DEFS_H
+
+#ifdef CONFIG_PARAVIRT
+#define SHARED_KERNEL_PMD       (pv_info.shared_kernel_pmd)
+#else
+#define SHARED_KERNEL_PMD       1
+#endif
+
+/*
+ * PGDIR_SHIFT determines what a top-level page table entry can map
+ */
+#define PGDIR_SHIFT     30
+#define PTRS_PER_PGD    4
+
+/*
+ * PMD_SHIFT determines the size of the area a middle-level
+ * page table can map
+ */
+#define PMD_SHIFT       21
+#define PTRS_PER_PMD    512
+
+/*
+ * entries per page directory level
+ */
+#define PTRS_PER_PTE    512
+
+#endif /* ASM_X86__PGTABLE_3LEVEL_DEFS_H */