diff options
Diffstat (limited to 'arch/powerpc/include/asm/mmu_context.h')
| -rw-r--r-- | arch/powerpc/include/asm/mmu_context.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mmu_context.h b/arch/powerpc/include/asm/mmu_context.h index 3a15b6db9501..1835ca1505d6 100644 --- a/arch/powerpc/include/asm/mmu_context.h +++ b/arch/powerpc/include/asm/mmu_context.h @@ -60,12 +60,51 @@ extern int hash__alloc_context_id(void); extern void hash__reserve_context_id(int id); extern void __destroy_context(int context_id); static inline void mmu_context_init(void) { } + +static inline int alloc_extended_context(struct mm_struct *mm, + unsigned long ea) +{ + int context_id; + + int index = ea >> MAX_EA_BITS_PER_CONTEXT; + + context_id = hash__alloc_context_id(); + if (context_id < 0) + return context_id; + + VM_WARN_ON(mm->context.extended_id[index]); + mm->context.extended_id[index] = context_id; + return context_id; +} + +static inline bool need_extra_context(struct mm_struct *mm, unsigned long ea) +{ + int context_id; + + context_id = get_ea_context(&mm->context, ea); + if (!context_id) + return true; + return false; +} + #else extern void switch_mmu_context(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk); extern unsigned long __init_new_context(void); extern void __destroy_context(unsigned long context_id); extern void mmu_context_init(void); +static inline int alloc_extended_context(struct mm_struct *mm, + unsigned long ea) +{ + /* non book3s_64 should never find this called */ + WARN_ON(1); + return -ENOMEM; +} + +static inline bool need_extra_context(struct mm_struct *mm, unsigned long ea) +{ + return false; +} #endif #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE) && defined(CONFIG_PPC_RADIX_MMU) |