diff options
Diffstat (limited to 'include/asm-s390/mmu_context.h')
| -rw-r--r-- | include/asm-s390/mmu_context.h | 50 |
1 files changed, 33 insertions, 17 deletions
diff --git a/include/asm-s390/mmu_context.h b/include/asm-s390/mmu_context.h index bcf24a873874..1d21da220d49 100644 --- a/include/asm-s390/mmu_context.h +++ b/include/asm-s390/mmu_context.h @@ -9,6 +9,7 @@ #ifndef __S390_MMU_CONTEXT_H #define __S390_MMU_CONTEXT_H +#include <asm/pgalloc.h> /* * get a new mmu context.. S390 don't know about contexts. */ @@ -16,29 +17,44 @@ #define destroy_context(mm) do { } while (0) +#ifndef __s390x__ +#define LCTL_OPCODE "lctl" +#define PGTABLE_BITS (_SEGMENT_TABLE|USER_STD_MASK) +#else +#define LCTL_OPCODE "lctlg" +#define PGTABLE_BITS (_REGION_TABLE|USER_STD_MASK) +#endif + static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) { } static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, - struct task_struct *tsk) + struct task_struct *tsk) { - if (prev != next) { -#ifndef __s390x__ - S390_lowcore.user_asce = (__pa(next->pgd)&PAGE_MASK) | - (_SEGMENT_TABLE|USER_STD_MASK); - /* Load home space page table origin. */ - asm volatile("lctl 13,13,%0" - : : "m" (S390_lowcore.user_asce) ); -#else /* __s390x__ */ - S390_lowcore.user_asce = (__pa(next->pgd) & PAGE_MASK) | - (_REGION_TABLE|USER_STD_MASK); - /* Load home space page table origin. */ - asm volatile("lctlg 13,13,%0" - : : "m" (S390_lowcore.user_asce) ); -#endif /* __s390x__ */ - } + pgd_t *shadow_pgd = get_shadow_pgd(next->pgd); + + if (prev != next) { + S390_lowcore.user_asce = (__pa(next->pgd) & PAGE_MASK) | + PGTABLE_BITS; + if (shadow_pgd) { + /* Load primary/secondary space page table origin. */ + S390_lowcore.user_exec_asce = + (__pa(shadow_pgd) & PAGE_MASK) | PGTABLE_BITS; + asm volatile(LCTL_OPCODE" 1,1,%0\n" + LCTL_OPCODE" 7,7,%1" + : : "m" (S390_lowcore.user_exec_asce), + "m" (S390_lowcore.user_asce) ); + } else if (switch_amode) { + /* Load primary space page table origin. */ + asm volatile(LCTL_OPCODE" 1,1,%0" + : : "m" (S390_lowcore.user_asce) ); + } else + /* Load home space page table origin. */ + asm volatile(LCTL_OPCODE" 13,13,%0" + : : "m" (S390_lowcore.user_asce) ); + } cpu_set(smp_processor_id(), next->cpu_vm_mask); } @@ -51,4 +67,4 @@ static inline void activate_mm(struct mm_struct *prev, set_fs(current->thread.mm_segment); } -#endif +#endif /* __S390_MMU_CONTEXT_H */ |
