diff --git a/kernel/Cargo.lock b/kernel/Cargo.lock
index 9f9bc730..dcafa37a 100644
--- a/kernel/Cargo.lock
+++ b/kernel/Cargo.lock
@@ -472,7 +472,7 @@ dependencies = [
  "log",
  "rlibc",
  "uefi",
- "x86_64 0.11.7",
+ "x86_64",
  "xmas-elf",
 ]
 
@@ -523,7 +523,7 @@ dependencies = [
  "virtio-drivers",
  "volatile",
  "woke",
- "x86_64 0.11.7",
+ "x86_64",
  "xmas-elf",
 ]
 
@@ -681,7 +681,7 @@ dependencies = [
 [[package]]
 name = "rvm"
 version = "1.2.0"
-source = "git+https://github.com/rcore-riscv-hypervisor-dev/RVM?rev=5cde71c#5cde71c7f4c1a691e12adbe542d28b381bc8e383"
+source = "git+https://github.com/rcore-riscv-hypervisor-dev/RVM?rev=5ccac8b#5ccac8ba6529cf06d5dabb8c137227c36f5ad2eb"
 dependencies = [
  "bit-set",
  "bit_field 0.10.1",
@@ -695,13 +695,13 @@ dependencies = [
  "rvm_macros",
  "spin",
  "x86 0.36.0",
- "x86_64 0.13.6",
+ "x86_64",
 ]
 
 [[package]]
 name = "rvm_macros"
 version = "0.1.0"
-source = "git+https://github.com/rcore-riscv-hypervisor-dev/RVM?rev=5cde71c#5cde71c7f4c1a691e12adbe542d28b381bc8e383"
+source = "git+https://github.com/rcore-riscv-hypervisor-dev/RVM?rev=5ccac8b#5ccac8ba6529cf06d5dabb8c137227c36f5ad2eb"
 dependencies = [
  "quote",
  "syn",
@@ -777,7 +777,7 @@ version = "0.4.3"
 source = "git+https://github.com/rcore-os/trapframe-rs?rev=bdfe5aa#bdfe5aaebcdd64636c8831c2b8c17e4fede40c0b"
 dependencies = [
  "raw-cpuid 8.0.0",
- "x86_64 0.11.7",
+ "x86_64",
 ]
 
 [[package]]
@@ -793,7 +793,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e58fc40dc1712664fc9b0a7bd8ca2f21ab49960924fb245a80a05e1e92f3dfe9"
 dependencies = [
  "bitflags",
- "x86_64 0.11.7",
+ "x86_64",
 ]
 
 [[package]]
@@ -937,16 +937,6 @@ dependencies = [
  "bitflags",
 ]
 
-[[package]]
-name = "x86_64"
-version = "0.13.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "021b49a4cb0a0d9490265cc169ca816014cbf61d3f3b75424815912977b81871"
-dependencies = [
- "bit_field 0.9.0",
- "bitflags",
-]
-
 [[package]]
 name = "xmas-elf"
 version = "0.7.0"
diff --git a/kernel/Cargo.toml b/kernel/Cargo.toml
index cab9773b..3268076d 100644
--- a/kernel/Cargo.toml
+++ b/kernel/Cargo.toml
@@ -77,7 +77,7 @@ virtio-drivers = { git = "https://github.com/rcore-riscv-hypervisor-dev/virtio-d
 volatile = "0.2"
 woke = "0.0.2"
 xmas-elf = "0.7"
-rvm = { git = "https://github.com/rcore-riscv-hypervisor-dev/RVM", rev = "5cde71c", optional = true }
+rvm = { git = "https://github.com/rcore-riscv-hypervisor-dev/RVM", rev = "5ccac8b", optional = true }
 
 [target.'cfg(target_arch = "x86_64")'.dependencies]
 apic = { git = "https://github.com/rcore-os/apic-rs", rev = "fb86bd7" }
diff --git a/kernel/src/rvm/inode.rs b/kernel/src/rvm/inode.rs
index dc38245e..2d274e5a 100644
--- a/kernel/src/rvm/inode.rs
+++ b/kernel/src/rvm/inode.rs
@@ -26,10 +26,15 @@ const RVM_VCPU_READ_STATE: u32 = RVM_IO + 0x13;
 const RVM_VCPU_WRITE_STATE: u32 = RVM_IO + 0x14;
 const RVM_VCPU_INTERRUPT: u32 = RVM_IO + 0x15;
 
-const RVM_RISCV_SET_SSIP: u32 = 0;
-const RVM_RISCV_CLEAR_SSIP: u32 = 1;
-const RVM_RISCV_SET_SEIP: u32 = 2;
-const RVM_RISCV_CLEAR_SEIP: u32 = 3;
+#[cfg(any(target_arch = "riscv64", target_arch = "riscv32"))]
+mod riscv_intr_constants {
+    pub const RVM_RISCV_SET_SSIP: u32 = 0;
+    pub const RVM_RISCV_CLEAR_SSIP: u32 = 1;
+    pub const RVM_RISCV_SET_SEIP: u32 = 2;
+    pub const RVM_RISCV_CLEAR_SEIP: u32 = 3;
+}
+#[cfg(any(target_arch = "riscv64", target_arch = "riscv32"))]
+use riscv_intr_constants::*;
 
 pub struct RvmINode {
     guests: RwLock<BTreeMap<usize, Guest>>,
diff --git a/kernel/src/rvm/mod.rs b/kernel/src/rvm/mod.rs
index ad89114f..26116240 100644
--- a/kernel/src/rvm/mod.rs
+++ b/kernel/src/rvm/mod.rs
@@ -55,12 +55,16 @@ mod rvm_extern_fn {
     }
 
     #[cfg(target_arch = "x86_64")]
-    #[rvm::extern_fn(x86_all_traps_handler_addr)]
-    unsafe fn rvm_x86_all_traps_handler_addr() -> usize {
-        extern "C" {
-            fn __alltraps();
-        }
-        __alltraps as usize
+    #[rvm::extern_fn(is_host_timer_interrupt)]
+    fn rvm_x86_is_host_timer_interrupt(_vec: u8) -> bool {
+        // TODO: fill in the blanks.
+        false
+    }
+    #[cfg(target_arch = "x86_64")]
+    #[rvm::extern_fn(is_host_serial_interrupt)]
+    fn rvm_x86_is_host_serial_interrupt(_vec: u8) -> bool {
+        // TODO: fill in the blanks.
+        false
     }
 
     #[cfg(any(target_arch = "riscv64", target_arch = "riscv32"))]
diff --git a/user b/user
index b4a7bd80..1c5e883f 160000
--- a/user
+++ b/user
@@ -1 +1 @@
-Subproject commit b4a7bd80a9dd34a9e4fe37fc623f0c33e6e23880
+Subproject commit 1c5e883fcfb0dc18895dce7b1931d7cf3a4261b1