Exit qemu

src/main.rs

@@ -13,9 +13,20 @@ pub extern "C" fn _start() -> ! {
     println!("Hello World{}", "!");
     serial_println!("Hello Host{}", "!");
 
+    unsafe {
+        exit_qemu();
+    }
+
     loop {}
 }
 
+pub unsafe fn exit_qemu() {
+    use x86_64::instructions::port::Port;
+
+    let mut port = Port::<u32>::new(0xf4);
+    port.write(0);
+}
+
 /// This function is called on panic.
 #[cfg(not(test))]
 #[panic_handler]