diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-01-30 15:32:58 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 15:32:58 +0300 |
| commit | 4891645e764d2e181b834509a689fcd12e890c10 (patch) | |
| tree | f347227c2d5a5b112bca8fe76b149ccc5157ef84 /include/asm-x86/pgtable.h | |
| parent | 8405b122ad0dd75354b3bfed4de9a96514fd40cb (diff) | |
| download | linux-4891645e764d2e181b834509a689fcd12e890c10.tar.xz | |
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/pgtable.h')
| -rw-r--r-- | include/asm-x86/pgtable.h | 63 |
1 files changed, 49 insertions, 14 deletions
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h index eb14a70a4728..a1eeacdf9d8c 100644 --- a/include/asm-x86/pgtable.h +++ b/include/asm-x86/pgtable.h @@ -178,6 +178,39 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) return __pte(val); } +#ifdef CONFIG_PARAVIRT +#include <asm/paravirt.h> +#else /* !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) + +#ifndef __PAGETABLE_PUD_FOLDED +#define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) +#define pgd_clear(pgd) native_pgd_clear(pgd) +#endif + +#ifndef set_pud +# define set_pud(pudp, pud) native_set_pud(pudp, pud) +#endif + +#ifndef __PAGETABLE_PMD_FOLDED +#define pud_clear(pud) native_pud_clear(pud) +#endif + +#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) +#define pmd_clear(pmd) native_pmd_clear(pmd) + +#define pte_update(mm, addr, ptep) do { } while (0) +#define pte_update_defer(mm, addr, ptep) do { } while (0) +#endif /* CONFIG_PARAVIRT */ + #endif /* __ASSEMBLY__ */ #ifdef CONFIG_X86_32 @@ -188,6 +221,22 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) #ifndef __ASSEMBLY__ +/* local pte updates need not use xchg for locking */ +static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) +{ + pte_t res = *ptep; + + /* Pure native function needs no input for mm, addr */ + native_pte_clear(NULL, 0, ptep); + return res; +} + +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); +} + #ifndef CONFIG_PARAVIRT /* * Rules for using pte_update - it must be called after any PTE update which @@ -206,16 +255,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) #define pte_update_defer(mm, addr, ptep) do { } while (0) #endif -/* local pte updates need not use xchg for locking */ -static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) -{ - pte_t res = *ptep; - - /* Pure native function needs no input for mm, addr */ - native_pte_clear(NULL, 0, ptep); - return res; -} - /* * We only update the dirty/accessed state if we set * the dirty bit by hand in the kernel, since the hardware @@ -287,10 +326,6 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_update(mm, addr, ptep); } -#ifndef CONFIG_PARAVIRT -#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) -#endif /* !CONFIG_PARAVIRT */ - #include <asm-generic/pgtable.h> #endif /* __ASSEMBLY__ */ |