diff options
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/pgtable.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/pgtable.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index 60e84260a07d..b609729e0d76 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -187,7 +187,7 @@ extern struct page *pgd_page(pgd_t pgd); static inline bool pte_user(pte_t pte) { - return !!(pte_val(pte) & _PAGE_USER); + return !(pte_val(pte) & _PAGE_PRIVILEGED); } #ifdef CONFIG_MEM_SOFT_DIRTY @@ -211,6 +211,22 @@ static inline pte_t pte_swp_clear_soft_dirty(pte_t pte) } #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ +static inline bool check_pte_access(unsigned long access, unsigned long ptev) +{ + /* + * This check for _PAGE_RWX and _PAGE_PRESENT bits + */ + if (access & ~ptev) + return false; + /* + * This check for access to privilege space + */ + if ((access & _PAGE_PRIVILEGED) != (ptev & _PAGE_PRIVILEGED)) + return false; + + return true; +} + void pgtable_cache_add(unsigned shift, void (*ctor)(void *)); void pgtable_cache_init(void); |