x86: unify paravirt pagetable accessors
Put all the defines for mapping pagetable operations to their native
versions (for the non-paravirt case) into one place. Make the
corresponding changes to paravirt.h.
The tricky part here is that when a pagetable entry can't be updated
atomically (ie, 32-bit PAE), we need special handlers for pte_clear,
set_pte_atomic and set_pte_present. However, the other two modes
don't need special handling for these, and can use a common
set_pte(_at) path.
[ mingo@elte.hu: fixes ]
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 24385de..4aa06b9 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -1039,6 +1039,27 @@
{
PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, pmdval.pud.pgd.pgd);
}
+
+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 */