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| author | Laura Abbott <lauraa@codeaurora.org> | 2014-08-19 21:41:42 +0200 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2014-09-08 15:39:18 +0200 |
| commit | b6d4f2800b7bad654caf00654f4bff21594ef838 (patch) | |
| tree | 9d6d26aa5587d8c65ea64dd61068db2659a1c2f0 /arch | |
| parent | arm64: convert part of soft_restart() to assembly (diff) | |
| download | linux-b6d4f2800b7bad654caf00654f4bff21594ef838.tar.xz linux-b6d4f2800b7bad654caf00654f4bff21594ef838.zip | |
arm64: Introduce {set,clear}_pte_bit
It's useful to be able to change individual bits in ptes at times.
Introduce functions for this and update existing pte_mk* functions
to use these primatives.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
[will: added missing inline keyword for new header functions]
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index ffe1ba0506d1..d58e40cde88e 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -149,46 +149,51 @@ extern struct page *empty_zero_page; #define pte_valid_not_user(pte) \ ((pte_val(pte) & (PTE_VALID | PTE_USER)) == PTE_VALID) -static inline pte_t pte_wrprotect(pte_t pte) +static inline pte_t clear_pte_bit(pte_t pte, pgprot_t prot) { - pte_val(pte) &= ~PTE_WRITE; + pte_val(pte) &= ~pgprot_val(prot); return pte; } -static inline pte_t pte_mkwrite(pte_t pte) +static inline pte_t set_pte_bit(pte_t pte, pgprot_t prot) { - pte_val(pte) |= PTE_WRITE; + pte_val(pte) |= pgprot_val(prot); return pte; } +static inline pte_t pte_wrprotect(pte_t pte) +{ + return clear_pte_bit(pte, __pgprot(PTE_WRITE)); +} + +static inline pte_t pte_mkwrite(pte_t pte) +{ + return set_pte_bit(pte, __pgprot(PTE_WRITE)); +} + static inline pte_t pte_mkclean(pte_t pte) { - pte_val(pte) &= ~PTE_DIRTY; - return pte; + return clear_pte_bit(pte, __pgprot(PTE_DIRTY)); } static inline pte_t pte_mkdirty(pte_t pte) { - pte_val(pte) |= PTE_DIRTY; - return pte; + return set_pte_bit(pte, __pgprot(PTE_DIRTY)); } static inline pte_t pte_mkold(pte_t pte) { - pte_val(pte) &= ~PTE_AF; - return pte; + return clear_pte_bit(pte, __pgprot(PTE_AF)); } static inline pte_t pte_mkyoung(pte_t pte) { - pte_val(pte) |= PTE_AF; - return pte; + return set_pte_bit(pte, __pgprot(PTE_AF)); } static inline pte_t pte_mkspecial(pte_t pte) { - pte_val(pte) |= PTE_SPECIAL; - return pte; + return set_pte_bit(pte, __pgprot(PTE_SPECIAL)); } static inline void set_pte(pte_t *ptep, pte_t pte) |