From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Wed, 30 Jan 2008 12:33:15 +0000 (+0100)
Subject: x86/paravirt: make set_pte operations common
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4eed80cd7a1668df6ddd884f9474beccc81ef3f7;p=openwrt%2Fstaging%2Fblogic.git

x86/paravirt: make set_pte operations common

Remove duplicate set_pte* operations.  PAE still needs to have special
variants of some of these because it can't atomically update a 64-bit
pte, so there's still some duplication.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 3593211e345b..ba1b94334144 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -978,6 +978,66 @@ static inline pgdval_t pgd_val(pgd_t pgd)
 	return ret;
 }
 
+static inline void set_pte(pte_t *ptep, pte_t pte)
+{
+	if (sizeof(pteval_t) > sizeof(long))
+		PVOP_VCALL3(pv_mmu_ops.set_pte, ptep,
+			    pte.pte, (u64)pte.pte >> 32);
+	else
+		PVOP_VCALL2(pv_mmu_ops.set_pte, ptep,
+			    pte.pte);
+}
+
+static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
+			      pte_t *ptep, pte_t pte)
+{
+	if (sizeof(pteval_t) > sizeof(long))
+		/* 5 arg words */
+		pv_mmu_ops.set_pte_at(mm, addr, ptep, pte);
+	else
+		PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte);
+}
+
+#ifdef CONFIG_X86_PAE
+/* Special-case pte-setting operations for PAE, which can't update a
+   64-bit pte atomically */
+static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
+{
+	PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep,
+		    pte.pte, pte.pte >> 32);
+}
+
+static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
+				   pte_t *ptep, pte_t pte)
+{
+	/* 5 arg words */
+	pv_mmu_ops.set_pte_present(mm, addr, ptep, pte);
+}
+
+static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
+			     pte_t *ptep)
+{
+	PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep);
+}
+#else  /* !CONFIG_X86_PAE */
+static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
+{
+	set_pte(ptep, pte);
+}
+
+static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
+				   pte_t *ptep, pte_t pte)
+{
+	set_pte(ptep, pte);
+}
+
+static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
+			     pte_t *ptep)
+{
+	set_pte_at(mm, addr, ptep, __pte(0));
+}
+#endif	/* CONFIG_X86_PAE */
+
 #if PAGETABLE_LEVELS >= 3
 static inline pmd_t __pmd(pmdval_t val)
 {
@@ -1010,31 +1070,6 @@ static inline pmdval_t pmd_val(pmd_t pmd)
 
 #ifdef CONFIG_X86_PAE
 
-static inline void set_pte(pte_t *ptep, pte_t pteval)
-{
-	PVOP_VCALL3(pv_mmu_ops.set_pte, ptep, pteval.pte_low, pteval.pte_high);
-}
-
-static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
-			      pte_t *ptep, pte_t pteval)
-{
-	/* 5 arg words */
-	pv_mmu_ops.set_pte_at(mm, addr, ptep, pteval);
-}
-
-static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
-{
-	PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep,
-		    pteval.pte_low, pteval.pte_high);
-}
-
-static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
-				   pte_t *ptep, pte_t pte)
-{
-	/* 5 arg words */
-	pv_mmu_ops.set_pte_present(mm, addr, ptep, pte);
-}
-
 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
 {
 	PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp,
@@ -1047,11 +1082,6 @@ static inline void set_pud(pud_t *pudp, pud_t pudval)
 		    pudval.pgd.pgd, pudval.pgd.pgd >> 32);
 }
 
-static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
-	PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep);
-}
-
 static inline void pmd_clear(pmd_t *pmdp)
 {
 	PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp);
@@ -1059,17 +1089,6 @@ static inline void pmd_clear(pmd_t *pmdp)
 
 #else  /* !CONFIG_X86_PAE */
 
-static inline void set_pte(pte_t *ptep, pte_t pteval)
-{
-	PVOP_VCALL2(pv_mmu_ops.set_pte, ptep, pteval.pte_low);
-}
-
-static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
-			      pte_t *ptep, pte_t pteval)
-{
-	PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pteval.pte_low);
-}
-
 static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
 {
 	PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, pmdval.pud.pgd.pgd);
@@ -1080,21 +1099,6 @@ static inline void pmd_clear(pmd_t *pmdp)
 	set_pmd(pmdp, __pmd(0));
 }
 
-static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
-	set_pte_at(mm, addr, ptep, __pte(0));
-}
-
-static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
-{
-	set_pte(ptep, pte);
-}
-
-static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
-				   pte_t *ptep, pte_t pte)
-{
-	set_pte(ptep, pte);
-}
 #endif	/* CONFIG_X86_PAE */
 
 /* Lazy mode for batching updates / context switch */