diff options
Diffstat (limited to 'arch/powerpc/include/asm/mmu_context.h')
| -rw-r--r-- | arch/powerpc/include/asm/mmu_context.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mmu_context.h b/arch/powerpc/include/asm/mmu_context.h index 492d8140a395..6177d43f0ce8 100644 --- a/arch/powerpc/include/asm/mmu_context.h +++ b/arch/powerpc/include/asm/mmu_context.h @@ -78,6 +78,52 @@ extern void switch_cop(struct mm_struct *next); extern int use_cop(unsigned long acop, struct mm_struct *mm); extern void drop_cop(unsigned long acop, struct mm_struct *mm); +#ifdef CONFIG_PPC_BOOK3S_64 +static inline void inc_mm_active_cpus(struct mm_struct *mm) +{ + atomic_inc(&mm->context.active_cpus); +} + +static inline void dec_mm_active_cpus(struct mm_struct *mm) +{ + atomic_dec(&mm->context.active_cpus); +} + +static inline void mm_context_add_copro(struct mm_struct *mm) +{ + /* + * On hash, should only be called once over the lifetime of + * the context, as we can't decrement the active cpus count + * and flush properly for the time being. + */ + inc_mm_active_cpus(mm); +} + +static inline void mm_context_remove_copro(struct mm_struct *mm) +{ + /* + * Need to broadcast a global flush of the full mm before + * decrementing active_cpus count, as the next TLBI may be + * local and the nMMU and/or PSL need to be cleaned up. + * Should be rare enough so that it's acceptable. + * + * Skip on hash, as we don't know how to do the proper flush + * for the time being. Invalidations will remain global if + * used on hash. + */ + if (radix_enabled()) { + flush_all_mm(mm); + dec_mm_active_cpus(mm); + } +} +#else +static inline void inc_mm_active_cpus(struct mm_struct *mm) { } +static inline void dec_mm_active_cpus(struct mm_struct *mm) { } +static inline void mm_context_add_copro(struct mm_struct *mm) { } +static inline void mm_context_remove_copro(struct mm_struct *mm) { } +#endif + + extern void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk); @@ -119,9 +165,13 @@ static inline void arch_dup_mmap(struct mm_struct *oldmm, { } +#ifndef CONFIG_PPC_BOOK3S_64 static inline void arch_exit_mmap(struct mm_struct *mm) { } +#else +extern void arch_exit_mmap(struct mm_struct *mm); +#endif static inline void arch_unmap(struct mm_struct *mm, struct vm_area_struct *vma, |