diff --git a/.gitmodules b/.gitmodules
index 8a5585b..37bd5ca 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,6 @@
 [submodule "rocket-chip"]
 	path = rocket-chip
-	url = git@github.com:chipsalliance/rocket-chip.git
+url=git@github.com:whutddk/Rocketchip-sub4Rtpp.git
 [submodule "rocket-chip-blocks"]
 	path = rocket-chip-blocks
-	url = git@github.com:chipsalliance/rocket-chip-blocks.git
+	url = git@github.com:chipsalliance/rocket-chip-blocks.git
\ No newline at end of file
diff --git a/rocket-chip b/rocket-chip
index 7cb3904..4543a40 160000
--- a/rocket-chip
+++ b/rocket-chip
@@ -1 +1 @@
-Subproject commit 7cb39049b9778bfc9dd4f66bb7c4abaede9606c9
+Subproject commit 4543a408ca691a3ba277d0c3a01611f3ceb92957