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x86: unify paravirt pagetable accessors

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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>
This commit is contained in:
Jeremy Fitzhardinge
2008-01-30 13:32:58 +01:00
committed by Ingo Molnar
parent 8405b122ad
commit 4891645e76
5 changed files with 136 additions and 87 deletions
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30
include/asm-x86/pgtable-2level.h
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@@ -15,29 +15,31 @@ static inline void native_set_pte(pte_t *ptep , pte_t pte)
{
*ptep = pte;
}
static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep , pte_t pte)
{
native_set_pte(ptep, pte);
}
static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
{
*pmdp = pmd;
}
#ifndef CONFIG_PARAVIRT
#define set_pte(pteptr, pteval) native_set_pte(pteptr, pteval)
#define set_pte_at(mm,addr,ptep,pteval) native_set_pte_at(mm, addr, ptep, pteval)
#define set_pmd(pmdptr, pmdval) native_set_pmd(pmdptr, pmdval)
#endif
#define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval)
#define set_pte_present(mm,addr,ptep,pteval) set_pte_at(mm,addr,ptep,pteval)
static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte)
{
native_set_pte(ptep, pte);
}
#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
static inline void native_set_pte_present(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte)
{
native_set_pte(ptep, pte);
}
static inline void native_pmd_clear(pmd_t *pmdp)
{
native_set_pmd(pmdp, __pmd(0));
}
static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *xp)
{
*xp = __pte(0);
*xp = native_make_pte(0);
}
#ifdef CONFIG_SMP