diff --git a/.gitmodules b/.gitmodules
index d604f52b..c28c829b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -3,16 +3,4 @@
     url = https://github.com/rcore-os/rcore-user.git
 [submodule "rboot"]
 	path = rboot
-	url = https://github.com/rcore-os/rboot.git
-[submodule "submodules/rcore-fs"]
-	path = submodules/rcore-fs
-	url = https://github.com/rcore-os/rcore-fs
-[submodule "submodules/RVM"]
-	path = submodules/RVM
-	url = https://github.com/rcore-riscv-hypervisor-dev/RVM
-[submodule "submodules/riscv"]
-	path = submodules/riscv
-	url = https://github.com/rcore-riscv-hypervisor-dev/riscv
-[submodule "submodules/riscv-hypervisor-extension"]
-	path = submodules/riscv-hypervisor-extension
-	url = https://github.com/rcore-riscv-hypervisor-dev/riscv-hypervisor-extension
+	url = https://github.com/rcore-os/rboot.git
\ No newline at end of file
diff --git a/submodules/RVM b/submodules/RVM
deleted file mode 160000
index 024d95bd..00000000
--- a/submodules/RVM
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 024d95bd307ae65ebdcc8ec69ed113b3b2fd6155
diff --git a/submodules/rcore-fs b/submodules/rcore-fs
deleted file mode 160000
index 517af47f..00000000
--- a/submodules/rcore-fs
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 517af47ff3f632f05b91b9ea73a047aa8df363f3
diff --git a/submodules/riscv b/submodules/riscv
deleted file mode 160000
index 5b88df36..00000000
--- a/submodules/riscv
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 5b88df3698906d0926949a8f8917a1d68ac12b99
diff --git a/submodules/riscv-hypervisor-extension b/submodules/riscv-hypervisor-extension
deleted file mode 160000
index 88f03d4c..00000000
--- a/submodules/riscv-hypervisor-extension
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 88f03d4c6d806a1359ae9d095ab284d609aeeabe
diff --git a/user b/user
index 94620bd6..9251d3d5 160000
--- a/user
+++ b/user
@@ -1 +1 @@
-Subproject commit 94620bd696ac61b40129d845671cde83001fdf61
+Subproject commit 9251d3d5535d9ceff6d4d36e3f203a190e9f708c