Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (37 commits)
  [S390] Avoid excessive inlining.
  [S390] Mark kernel text section read-only.
  [S390] Convert memory detection into C code.
  [S390] Calibrate delay and bogomips.
  [S390] Hypervisor filesystem (s390_hypfs) for z/VM
  [S390] Add crypto support for 3592 tape devices
  [S390] boot from NSS support
  [S390] Support for s390 Pseudo Random Number Generator
  [S390] ETR support.
  [S390] noexec protection
  [S390] move crypto options and some cleanup.
  [S390] cio: Don't spam debug feature.
  [S390] Cleanup of CHSC event handling.
  [S390] cio: declare hardware structures packed.
  [S390] Add set_fs(USER_DS) to start_thread().
  [S390] cio: Catch operand exceptions on stsch.
  [S390] Fix register usage description.
  [S390] kretprobe_trampoline_holder() in wrong section.
  [S390] Fix kprobes breakpoint handling.
  [S390] Update maintainers file.
  ...

1 files changed, 33 insertions, 17 deletions

diff --git a/include/asm-s390/mmu_context.h b/include/asm-s390/mmu_context.h
index bcf24a8..1d21da2 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 */