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, 7 insertions, 4 deletions

diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index c1055a150b88..707fbfde1324 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -102,7 +102,8 @@ BEGIN_FW_FTR_SECTION
         /* if from user, see if there are any DTL entries to process */
         ld      r10,PACALPPACAPTR(r13)  /* get ptr to VPA */
         ld      r11,PACA_DTL_RIDX(r13)  /* get log read index */
-        ld      r10,LPPACA_DTLIDX(r10)  /* get log write index */
+        addi    r10,r10,LPPACA_DTLIDX
+        LDX_BE  r10,0,r10               /* get log write index */
         cmpd    cr1,r11,r10
         beq+    cr1,33f
         bl      .accumulate_stolen_time
@@ -531,9 +532,11 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_1T_SEGMENT)
          */
         ld      r9,PACA_SLBSHADOWPTR(r13)
         li      r12,0
-        std     r12,SLBSHADOW_STACKESID(r9) /* Clear ESID */
-        std     r7,SLBSHADOW_STACKVSID(r9)  /* Save VSID */
-        std     r0,SLBSHADOW_STACKESID(r9)  /* Save ESID */
+        std     r12,SLBSHADOW_STACKESID(r9)     /* Clear ESID */
+        li      r12,SLBSHADOW_STACKVSID
+        STDX_BE r7,r12,r9                       /* Save VSID */
+        li      r12,SLBSHADOW_STACKESID
+        STDX_BE r0,r12,r9                       /* Save ESID */
 
         /* No need to check for MMU_FTR_NO_SLBIE_B here, since when
          * we have 1TB segments, the only CPUs known to have the errata