powerpc/mm: Use the required number of VSID bits in slbmte
ASM_VSID_SCRAMBLE can leave non-zero bits in the high 28 bits of the result
for 256MB segment (40 bits for 1T segment). Properly mask them before using
the values in slbmte
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>
diff --git a/arch/powerpc/mm/slb_low.S b/arch/powerpc/mm/slb_low.S
index e132dc6..3b75f19 100644
--- a/arch/powerpc/mm/slb_low.S
+++ b/arch/powerpc/mm/slb_low.S
@@ -223,7 +223,11 @@
*/
slb_finish_load:
ASM_VSID_SCRAMBLE(r10,r9,256M)
- rldimi r11,r10,SLB_VSID_SHIFT,16 /* combine VSID and flags */
+ /*
+ * bits above VSID_BITS_256M need to be ignored from r10
+ * also combine VSID and flags
+ */
+ rldimi r11,r10,SLB_VSID_SHIFT,(64 - (SLB_VSID_SHIFT + VSID_BITS_256M))
/* r3 = EA, r11 = VSID data */
/*
@@ -287,7 +291,11 @@
slb_finish_load_1T:
srdi r10,r10,40-28 /* get 1T ESID */
ASM_VSID_SCRAMBLE(r10,r9,1T)
- rldimi r11,r10,SLB_VSID_SHIFT_1T,16 /* combine VSID and flags */
+ /*
+ * bits above VSID_BITS_1T need to be ignored from r10
+ * also combine VSID and flags
+ */
+ rldimi r11,r10,SLB_VSID_SHIFT_1T,(64 - (SLB_VSID_SHIFT_1T + VSID_BITS_1T))
li r10,MMU_SEGSIZE_1T
rldimi r11,r10,SLB_VSID_SSIZE_SHIFT,0 /* insert segment size */