x86: page.h: move and unify types for pagetable entry, #5

based on:

 Subject: x86: page.h: move and unify types for pagetable entry
 From: Jeremy Fitzhardinge <jeremy@goop.org>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 72 insertions, 0 deletions

diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index 530439e0d340..014f087d7c27 100644
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -181,6 +181,78 @@ static void inline copy_user_page(void *to, void *from, unsigned long vaddr,
         alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
 
+#ifdef CONFIG_X86_64
+typedef struct { pgdval_t pgd; } pgd_t;
+typedef struct { pgprotval_t pgprot; } pgprot_t;
+
+static inline pgd_t native_make_pgd(pgdval_t val)
+{
+        return (pgd_t) { val };
+}
+
+static inline pgdval_t native_pgd_val(pgd_t pgd)
+{
+        return pgd.pgd;
+}
+
+#if PAGETABLE_LEVELS >= 3
+#if PAGETABLE_LEVELS == 4
+typedef struct { pudval_t pud; } pud_t;
+
+static inline pud_t native_make_pud(pmdval_t val)
+{
+        return (pud_t) { val };
+}
+
+static inline pudval_t native_pud_val(pud_t pud)
+{
+        return pud.pud;
+}
+#else   /* PAGETABLE_LEVELS == 3 */
+#include <asm-generic/pgtable-nopud.h>
+#endif  /* PAGETABLE_LEVELS == 4 */
+
+typedef struct { pmdval_t pmd; } pmd_t;
+
+static inline pmd_t native_make_pmd(pmdval_t val)
+{
+        return (pmd_t) { val };
+}
+
+static inline pmdval_t native_pmd_val(pmd_t pmd)
+{
+        return pmd.pmd;
+}
+#else  /* PAGETABLE_LEVELS == 2 */
+#include <asm-generic/pgtable-nopmd.h>
+#endif  /* PAGETABLE_LEVELS >= 3 */
+
+#define pgprot_val(x)   ((x).pgprot)
+#define __pgprot(x)     ((pgprot_t) { (x) } )
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else  /* !CONFIG_PARAVIRT */
+
+#define pgd_val(x)      native_pgd_val(x)
+#define __pgd(x)        native_make_pgd(x)
+
+#ifndef __PAGETABLE_PUD_FOLDED
+#define pud_val(x)      native_pud_val(x)
+#define __pud(x)        native_make_pud(x)
+#endif
+
+#ifndef __PAGETABLE_PMD_FOLDED
+#define pmd_val(x)      native_pmd_val(x)
+#define __pmd(x)        native_make_pmd(x)
+#endif
+
+#define pte_val(x)      native_pte_val(x)
+#define __pte(x)        native_make_pte(x)
+
+#endif  /* CONFIG_PARAVIRT */
+
+#endif /* CONFIG_X86_64 */
 #endif  /* __ASSEMBLY__ */