[PATCH 38/65] powerpc/mm/radix: Add MMU_FTR_RADIX

[Aneesh Kumar K.V]

We are going to add asm changes in the follow up patches. Add the
feature bit now so that we can get it all build. We will enable radix
in the last patch using cpu table.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>
---
 arch/powerpc/include/asm/book3s/64/mmu.h | 3 ++-
 arch/powerpc/include/asm/mmu.h           | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/book3s/64/mmu.h b/arch/powerpc/include/asm/book3s/64/mmu.h
index a526642f1c02..0835a8f9904b 100644
--- a/arch/powerpc/include/asm/book3s/64/mmu.h
+++ b/arch/powerpc/include/asm/book3s/64/mmu.h
@@ -23,7 +23,8 @@ struct mmu_psize_def {
 };
 extern struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT];
 
-#define radix_enabled() (0)
+#define radix_enabled() mmu_has_feature(MMU_FTR_RADIX)
+
 #endif /* __ASSEMBLY__ */
 
 /* 64-bit classic hash table MMU */
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 34070e982f1d..9e8c05f9c562 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -87,6 +87,10 @@
 /* 1T segments available
  */
 #define MMU_FTR_1T_SEGMENT		ASM_CONST(0x40000000)
+/*
+ * Radix page table available
+ */
+#define MMU_FTR_RADIX                  ASM_CONST(0x80000000)
 
 /* MMU feature bit sets for various CPUs */
 #define MMU_FTRS_DEFAULT_HPTE_ARCH_V2	\
-- 
2.5.0