powerpc/mm: Abstraction for switch_mmu_context()
How we switch MMU context differs between hash and radix. For hash we
need to switch the SLB details and for radix we need to switch the PID
SPR.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/include/asm/mmu_context.h b/arch/powerpc/include/asm/mmu_context.h
index 4eaab40..4e2a294 100644
--- a/arch/powerpc/include/asm/mmu_context.h
+++ b/arch/powerpc/include/asm/mmu_context.h
@@ -33,16 +33,23 @@
extern long mm_iommu_mapped_inc(struct mm_iommu_table_group_mem_t *mem);
extern void mm_iommu_mapped_dec(struct mm_iommu_table_group_mem_t *mem);
#endif
-
-extern void switch_mmu_context(struct mm_struct *prev, struct mm_struct *next);
extern void switch_slb(struct task_struct *tsk, struct mm_struct *mm);
extern void set_context(unsigned long id, pgd_t *pgd);
#ifdef CONFIG_PPC_BOOK3S_64
+static inline void switch_mmu_context(struct mm_struct *prev,
+ struct mm_struct *next,
+ struct task_struct *tsk)
+{
+ return switch_slb(tsk, next);
+}
+
extern int __init_new_context(void);
extern void __destroy_context(int context_id);
static inline void mmu_context_init(void) { }
#else
+extern void switch_mmu_context(struct mm_struct *prev, struct mm_struct *next,
+ struct task_struct *tsk);
extern unsigned long __init_new_context(void);
extern void __destroy_context(unsigned long context_id);
extern void mmu_context_init(void);
@@ -88,17 +95,11 @@
if (cpu_has_feature(CPU_FTR_ALTIVEC))
asm volatile ("dssall");
#endif /* CONFIG_ALTIVEC */
-
- /* The actual HW switching method differs between the various
- * sub architectures.
+ /*
+ * The actual HW switching method differs between the various
+ * sub architectures. Out of line for now
*/
-#ifdef CONFIG_PPC_STD_MMU_64
- switch_slb(tsk, next);
-#else
- /* Out of line for now */
- switch_mmu_context(prev, next);
-#endif
-
+ switch_mmu_context(prev, next, tsk);
}
#define deactivate_mm(tsk,mm) do { } while (0)