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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-01-30 13:32:58 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:32:58 +0100 |
| commit | 4891645e764d2e181b834509a689fcd12e890c10 (patch) | |
| tree | f347227c2d5a5b112bca8fe76b149ccc5157ef84 /include/asm-x86/paravirt.h | |
| parent | 8405b122ad0dd75354b3bfed4de9a96514fd40cb (diff) | |
| download | kernel-crypto-4891645e764d2e181b834509a689fcd12e890c10.tar.gz kernel-crypto-4891645e764d2e181b834509a689fcd12e890c10.tar.xz kernel-crypto-4891645e764d2e181b834509a689fcd12e890c10.zip | |
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>
Diffstat (limited to 'include/asm-x86/paravirt.h')
| -rw-r--r-- | include/asm-x86/paravirt.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index 24385decbd4..4aa06b929e4 100644 --- a/include/asm-x86/paravirt.h +++ b/include/asm-x86/paravirt.h @@ -1039,6 +1039,27 @@ static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval) { 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 */ |