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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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15
include/asm-x86/pgtable-3level.h
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@ -39,11 +39,6 @@ static inline void native_set_pte(pte_t *ptep, pte_t pte)
smp_wmb();
ptep->pte_low = pte.pte_low;
}
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);
}
/*
* Since this is only called on user PTEs, and the page fault handler
@ -94,16 +89,6 @@ static inline void native_pmd_clear(pmd_t *pmd)
*(tmp + 1) = 0;
}
#ifndef CONFIG_PARAVIRT
#define set_pte(ptep, pte) native_set_pte(ptep, pte)
#define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
#define set_pte_present(mm, addr, ptep, pte) native_set_pte_present(mm, addr, ptep, pte)
#define set_pte_atomic(ptep, pte) native_set_pte_atomic(ptep, pte)
#define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd)
#define set_pud(pudp, pud) native_set_pud(pudp, pud)
#define pmd_clear(pmd) native_pmd_clear(pmd)
#endif
/*
* Pentium-II erratum A13: in PAE mode we explicitly have to flush
* the TLB via cr3 if the top-level pgd is changed...