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author | 2018-10-09 13:51:52 +0000 | |
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committer | 2018-10-14 18:04:09 +1100 | |
commit | daba790242dfbdf6ef1bcabf3d6ed4c88cccf59a (patch) | |
tree | be059bd53316d760086967beb318af465ee69cf9 /arch/powerpc/include/asm/nohash/32/pgtable.h | |
parent | powerpc/mm: move some nohash pte helpers in nohash/[32:64]/pgtable.h (diff) | |
download | wireguard-linux-daba790242dfbdf6ef1bcabf3d6ed4c88cccf59a.tar.xz wireguard-linux-daba790242dfbdf6ef1bcabf3d6ed4c88cccf59a.zip |
powerpc/mm: add pte helpers to query and change pte flags
In order to avoid using generic _PAGE_XXX flags in powerpc
core functions, define helpers for all needed flags:
- pte_mkuser() and pte_mkprivileged() to set/unset and/or
unset/set _PAGE_USER and/or _PAGE_PRIVILEGED
- pte_hashpte() to check if _PAGE_HASHPTE is set.
- pte_ci() check if cache is inhibited (already existing on book3s/64)
- pte_exprotect() to protect against execution
- pte_exec() and pte_mkexec() to query and set page execution
- pte_mkpte() to set _PAGE_PTE flag.
- pte_hw_valid() to check _PAGE_PRESENT since pte_present does
something different on book3s/64.
On book3s/32 there is no exec protection, so pte_mkexec() and
pte_exprotect() are nops and pte_exec() returns always true.
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/32/pgtable.h')
-rw-r--r-- | arch/powerpc/include/asm/nohash/32/pgtable.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h index 4373f8c44b6d..6fecfd7854f5 100644 --- a/arch/powerpc/include/asm/nohash/32/pgtable.h +++ b/arch/powerpc/include/asm/nohash/32/pgtable.h @@ -164,6 +164,11 @@ static inline pte_t pte_wrprotect(pte_t pte) return __pte(ptev); } +static inline pte_t pte_mkexec(pte_t pte) +{ + return __pte(pte_val(pte) | _PAGE_EXEC); +} + #define pmd_none(pmd) (!pmd_val(pmd)) #define pmd_bad(pmd) (pmd_val(pmd) & _PMD_BAD) #define pmd_present(pmd) (pmd_val(pmd) & _PMD_PRESENT_MASK) |