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-rw-r--r--kernel/arch/powerpc/mm/slb_low.S7
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/arch/powerpc/mm/slb_low.S b/kernel/arch/powerpc/mm/slb_low.S
index 736d18b3c..4c48b4876 100644
--- a/kernel/arch/powerpc/mm/slb_low.S
+++ b/kernel/arch/powerpc/mm/slb_low.S
@@ -113,7 +113,12 @@ BEGIN_FTR_SECTION
END_MMU_FTR_SECTION_IFCLR(MMU_FTR_1T_SEGMENT)
b slb_finish_load_1T
-0:
+0: /*
+ * For userspace addresses, make sure this is region 0.
+ */
+ cmpdi r9, 0
+ bne 8f
+
/* when using slices, we extract the psize off the slice bitmaps
* and then we need to get the sllp encoding off the mmu_psize_defs
* array.