diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a394f345e421..43c1be9d636d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2016-08-01  Virendra Pathak  <virendra.pathak@broadcom.com>
+
+	* config/aarch64/aarch64.c (vulcan_tunings): Update
+	vulcan L1 cache_line_size.
+
 2016-07-30  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
 	* config/rs6000/rs6000-protos.h (rs6000_adjust_vec_address): New
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index e56398a3e355..61f5f58844e0 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -768,7 +768,7 @@ static const struct tune_params vulcan_tunings =
   2,	/* min_div_recip_mul_sf.  */
   2,	/* min_div_recip_mul_df.  */
   0,	/* max_case_values.  */
-  0,	/* cache_line_size.  */
+  64,	/* cache_line_size.  */
   tune_params::AUTOPREFETCHER_OFF,	/* autoprefetcher_model.  */
   (AARCH64_EXTRA_TUNE_NONE)	/* tune_flags.  */
 };