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, 5 insertions, 1 deletions

diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 8726779e1409..76d8e7cc7805 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -443,8 +443,12 @@ good_area:
                                       regs, address);
 #ifdef CONFIG_PPC_SMLPAR
                         if (firmware_has_feature(FW_FEATURE_CMO)) {
+                                u32 page_ins;
+
                                 preempt_disable();
-                                get_lppaca()->page_ins += (1 << PAGE_FACTOR);
+                                page_ins = be32_to_cpu(get_lppaca()->page_ins);
+                                page_ins += 1 << PAGE_FACTOR;
+                                get_lppaca()->page_ins = cpu_to_be32(page_ins);
                                 preempt_enable();
                         }
 #endif /* CONFIG_PPC_SMLPAR */