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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2018-10-09 16:52:12 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-10-14 10:04:09 +0300 |
| commit | a0da4bc166f21d88400ec91e01b815054561804e (patch) | |
| tree | d51c133ef5b51cf601412bcbf7bde36833d84ee6 /arch/powerpc/include/asm/nohash/pgtable.h | |
| parent | 6c5d2d3fd376c6b4b8d8624b53dbdda966ce762b (diff) | |
| download | linux-a0da4bc166f21d88400ec91e01b815054561804e.tar.xz | |
powerpc/mm: Allow platforms to redefine some helpers
The 40xx defines _PAGE_HWWRITE while others don't.
The 8xx defines _PAGE_RO instead of _PAGE_RW.
The 8xx defines _PAGE_PRIVILEGED instead of _PAGE_USER.
The 8xx defines _PAGE_HUGE and _PAGE_NA while others don't.
Lets those platforms redefine pte_write(), pte_wrprotect() and
pte_mkwrite() and get _PAGE_RO and _PAGE_HWWRITE off the common
helpers.
Lets the 8xx redefine pte_user(), pte_mkprivileged() and pte_mkuser()
and get rid of _PAGE_PRIVILEGED and _PAGE_USER default values.
Lets the 8xx redefine pte_mkhuge() and get rid of
_PAGE_HUGE default value.
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/nohash/pgtable.h')
| -rw-r--r-- | arch/powerpc/include/asm/nohash/pgtable.h | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/arch/powerpc/include/asm/nohash/pgtable.h b/arch/powerpc/include/asm/nohash/pgtable.h index eeb4f891f362..04e9f0922ad4 100644 --- a/arch/powerpc/include/asm/nohash/pgtable.h +++ b/arch/powerpc/include/asm/nohash/pgtable.h @@ -39,10 +39,12 @@ #ifndef __ASSEMBLY__ /* Generic accessors to PTE bits */ +#ifndef pte_write static inline int pte_write(pte_t pte) { - return (pte_val(pte) & (_PAGE_RW | _PAGE_RO)) != _PAGE_RO; + return pte_val(pte) & _PAGE_RW; } +#endif static inline int pte_read(pte_t pte) { return 1; } static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; } @@ -84,10 +86,12 @@ static inline bool pte_hw_valid(pte_t pte) * and PTE_64BIT, PAGE_KERNEL_X contains _PAGE_BAP_SR which is also in * _PAGE_USER. Need to explicitly match _PAGE_BAP_UR bit in that case too. */ +#ifndef pte_user static inline bool pte_user(pte_t pte) { - return (pte_val(pte) & (_PAGE_USER | _PAGE_PRIVILEGED)) == _PAGE_USER; + return (pte_val(pte) & _PAGE_USER) == _PAGE_USER; } +#endif /* * We only find page table entry in the last level @@ -127,10 +131,12 @@ static inline pte_t pte_exprotect(pte_t pte) return __pte(pte_val(pte) & ~_PAGE_EXEC); } +#ifndef pte_mkclean static inline pte_t pte_mkclean(pte_t pte) { - return __pte(pte_val(pte) & ~(_PAGE_DIRTY | _PAGE_HWWRITE)); + return __pte(pte_val(pte) & ~_PAGE_DIRTY); } +#endif static inline pte_t pte_mkold(pte_t pte) { @@ -147,20 +153,26 @@ static inline pte_t pte_mkspecial(pte_t pte) return __pte(pte_val(pte) | _PAGE_SPECIAL); } +#ifndef pte_mkhuge static inline pte_t pte_mkhuge(pte_t pte) { - return __pte(pte_val(pte) | _PAGE_HUGE); + return __pte(pte_val(pte)); } +#endif +#ifndef pte_mkprivileged static inline pte_t pte_mkprivileged(pte_t pte) { - return __pte((pte_val(pte) & ~_PAGE_USER) | _PAGE_PRIVILEGED); + return __pte(pte_val(pte) & ~_PAGE_USER); } +#endif +#ifndef pte_mkuser static inline pte_t pte_mkuser(pte_t pte) { - return __pte((pte_val(pte) & ~_PAGE_PRIVILEGED) | _PAGE_USER); + return __pte(pte_val(pte) | _PAGE_USER); } +#endif static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { |