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Diffstat (limited to 'include/asm-s390/mmu_context.h')
-rw-r--r--include/asm-s390/mmu_context.h50
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 */
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