diff --git a/sdk/xtdk/amd64/ketypes.h b/sdk/xtdk/amd64/ketypes.h
index 91097bc..7514926 100644
--- a/sdk/xtdk/amd64/ketypes.h
+++ b/sdk/xtdk/amd64/ketypes.h
@@ -52,6 +52,19 @@
 #define AMD64_INTERRUPT_GATE                      0xE
 #define AMD64_TRAP_GATE                           0xF
 
+/* Interrupt request levels definitions */
+#define PASSIVE_LEVEL                             0
+#define LOW_LEVEL                                 0
+#define APC_LEVEL                                 1
+#define DISPATCH_LEVEL                            2
+#define CMC_LEVEL                                 5
+#define CLOCK_LEVEL                               13
+#define IPI_LEVEL                                 14
+#define DRS_LEVEL                                 14
+#define POWER_LEVEL                               14
+#define PROFILE_LEVEL                             15
+#define HIGH_LEVEL                                15
+
 /* Size of the exception area */
 #define EXCEPTION_AREA_SIZE               64