powerpc/mm: Add 64TB support

Increase max addressable range to 64TB. This is not tested on
real hardware yet.

Reviewed-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/powerpc/mm/slb_low.S b/arch/powerpc/mm/slb_low.S
index f6a262555ef2..1a16ca227757 100644
--- a/arch/powerpc/mm/slb_low.S
+++ b/arch/powerpc/mm/slb_low.S
@@ -56,6 +56,12 @@ _GLOBAL(slb_allocate_realmode)
          */
 _GLOBAL(slb_miss_kernel_load_linear)
         li      r11,0
+        li      r9,0x1
+        /*
+         * for 1T we shift 12 bits more.  slb_finish_load_1T will do
+         * the necessary adjustment
+         */
+        rldimi  r10,r9,(CONTEXT_BITS + USER_ESID_BITS),0
 BEGIN_FTR_SECTION
         b       slb_finish_load
 END_MMU_FTR_SECTION_IFCLR(MMU_FTR_1T_SEGMENT)
@@ -85,6 +91,12 @@ _GLOBAL(slb_miss_kernel_load_vmemmap)
         _GLOBAL(slb_miss_kernel_load_io)
         li      r11,0
 6:
+        li      r9,0x1
+        /*
+         * for 1T we shift 12 bits more.  slb_finish_load_1T will do
+         * the necessary adjustment
+         */
+        rldimi  r10,r9,(CONTEXT_BITS + USER_ESID_BITS),0
 BEGIN_FTR_SECTION
         b       slb_finish_load
 END_MMU_FTR_SECTION_IFCLR(MMU_FTR_1T_SEGMENT)