diff options
Diffstat (limited to 'arch/powerpc/mm/mmu_context_hash64.c')
| -rw-r--r-- | arch/powerpc/mm/mmu_context_hash64.c | 43 |
1 files changed, 35 insertions, 8 deletions
diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c index 9ca6fe16cb29..b5288b460bef 100644 --- a/arch/powerpc/mm/mmu_context_hash64.c +++ b/arch/powerpc/mm/mmu_context_hash64.c @@ -58,6 +58,17 @@ again: return index; } EXPORT_SYMBOL_GPL(__init_new_context); +static int radix__init_new_context(struct mm_struct *mm, int index) +{ + unsigned long rts_field; + + /* + * set the process table entry, + */ + rts_field = 3ull << PPC_BITLSHIFT(2); + process_tb[index].prtb0 = cpu_to_be64(rts_field | __pa(mm->pgd) | RADIX_PGD_INDEX_SIZE); + return 0; +} int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { @@ -67,13 +78,18 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm) if (index < 0) return index; - /* The old code would re-promote on fork, we don't do that - * when using slices as it could cause problem promoting slices - * that have been forced down to 4K - */ - if (slice_mm_new_context(mm)) - slice_set_user_psize(mm, mmu_virtual_psize); - subpage_prot_init_new_context(mm); + if (radix_enabled()) { + radix__init_new_context(mm, index); + } else { + + /* The old code would re-promote on fork, we don't do that + * when using slices as it could cause problem promoting slices + * that have been forced down to 4K + */ + if (slice_mm_new_context(mm)) + slice_set_user_psize(mm, mmu_virtual_psize); + subpage_prot_init_new_context(mm); + } mm->context.id = index; #ifdef CONFIG_PPC_ICSWX mm->context.cop_lockp = kmalloc(sizeof(spinlock_t), GFP_KERNEL); @@ -144,8 +160,19 @@ void destroy_context(struct mm_struct *mm) mm->context.cop_lockp = NULL; #endif /* CONFIG_PPC_ICSWX */ + if (radix_enabled()) + process_tb[mm->context.id].prtb1 = 0; + else + subpage_prot_free(mm); destroy_pagetable_page(mm); __destroy_context(mm->context.id); - subpage_prot_free(mm); mm->context.id = MMU_NO_CONTEXT; } + +#ifdef CONFIG_PPC_RADIX_MMU +void radix__switch_mmu_context(struct mm_struct *prev, struct mm_struct *next) +{ + mtspr(SPRN_PID, next->context.id); + asm volatile("isync": : :"memory"); +} +#endif |