diff options
Diffstat (limited to 'include/asm-s390/mmu_context.h')
| -rw-r--r-- | include/asm-s390/mmu_context.h | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/include/asm-s390/mmu_context.h b/include/asm-s390/mmu_context.h index a77d4ba3c8e..b5a34c6f91a 100644 --- a/include/asm-s390/mmu_context.h +++ b/include/asm-s390/mmu_context.h @@ -10,15 +10,19 @@ #define __S390_MMU_CONTEXT_H #include <asm/pgalloc.h> +#include <asm/uaccess.h> #include <asm-generic/mm_hooks.h> static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { - mm->context = _ASCE_TABLE_LENGTH | _ASCE_USER_BITS; + mm->context.asce_bits = _ASCE_TABLE_LENGTH | _ASCE_USER_BITS; #ifdef CONFIG_64BIT - mm->context |= _ASCE_TYPE_REGION3; + mm->context.asce_bits |= _ASCE_TYPE_REGION3; #endif + mm->context.noexec = s390_noexec; + mm->context.asce_limit = STACK_TOP_MAX; + crst_table_init((unsigned long *) mm->pgd, pgd_entry_type(mm)); return 0; } @@ -32,24 +36,25 @@ static inline int init_new_context(struct task_struct *tsk, static inline void update_mm(struct mm_struct *mm, struct task_struct *tsk) { - S390_lowcore.user_asce = mm->context | __pa(mm->pgd); + pgd_t *pgd = mm->pgd; + + S390_lowcore.user_asce = mm->context.asce_bits | __pa(pgd); if (switch_amode) { /* Load primary space page table origin. */ - pgd_t *shadow_pgd = get_shadow_table(mm->pgd) ? : mm->pgd; - S390_lowcore.user_exec_asce = mm->context | __pa(shadow_pgd); + pgd = mm->context.noexec ? get_shadow_table(pgd) : pgd; + S390_lowcore.user_exec_asce = mm->context.asce_bits | __pa(pgd); asm volatile(LCTL_OPCODE" 1,1,%0\n" : : "m" (S390_lowcore.user_exec_asce) ); } else /* Load home space page table origin. */ asm volatile(LCTL_OPCODE" 13,13,%0" : : "m" (S390_lowcore.user_asce) ); + set_fs(current->thread.mm_segment); } static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) { - if (unlikely(prev == next)) - return; cpu_set(smp_processor_id(), next->cpu_vm_mask); update_mm(next, tsk); } @@ -61,7 +66,6 @@ static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next) { switch_mm(prev, next, current); - set_fs(current->thread.mm_segment); } #endif /* __S390_MMU_CONTEXT_H */ |