diff --git a/qemu-common.h b/qemu-common.h
index 2ce47aa..44870fe52 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -341,6 +341,12 @@
     return res.ll;
 }
 
+/* Round number down to multiple */
+#define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m))
+
+/* Round number up to multiple */
+#define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m))
+
 #include "module.h"
 
 #endif