powerpc: Fix little endian lppaca, slb_shadow and dtl_entry

The lppaca, slb_shadow and dtl_entry hypervisor structures are
big endian, so we have to byte swap them in little endian builds.

LE KVM hosts will also need to be fixed but for now add an #error
to remind us.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 6 insertions, 3 deletions

diff --git a/arch/powerpc/mm/slb.c b/arch/powerpc/mm/slb.c
index a538c80db2df..9d1d33cd2be5 100644
--- a/arch/powerpc/mm/slb.c
+++ b/arch/powerpc/mm/slb.c
@@ -66,8 +66,10 @@ static inline void slb_shadow_update(unsigned long ea, int ssize,
          * we only update the current CPU's SLB shadow buffer.
          */
         get_slb_shadow()->save_area[entry].esid = 0;
-        get_slb_shadow()->save_area[entry].vsid = mk_vsid_data(ea, ssize, flags);
-        get_slb_shadow()->save_area[entry].esid = mk_esid_data(ea, ssize, entry);
+        get_slb_shadow()->save_area[entry].vsid =
+                                cpu_to_be64(mk_vsid_data(ea, ssize, flags));
+        get_slb_shadow()->save_area[entry].esid =
+                                cpu_to_be64(mk_esid_data(ea, ssize, entry));
 }
 
 static inline void slb_shadow_clear(unsigned long entry)
@@ -112,7 +114,8 @@ static void __slb_flush_and_rebolt(void)
         } else {
                 /* Update stack entry; others don't change */
                 slb_shadow_update(get_paca()->kstack, mmu_kernel_ssize, lflags, 2);
-                ksp_vsid_data = get_slb_shadow()->save_area[2].vsid;
+                ksp_vsid_data =
+                        be64_to_cpu(get_slb_shadow()->save_area[2].vsid);
         }
 
         /* We need to do this all in asm, so we're sure we don't touch