diff --git a/include/lib/cpus/aarch64/cortex_x2.h b/include/lib/cpus/aarch64/cortex_x2.h
index 3c315d5..bf1b460 100644
--- a/include/lib/cpus/aarch64/cortex_x2.h
+++ b/include/lib/cpus/aarch64/cortex_x2.h
@@ -15,6 +15,15 @@
 #define CORTEX_X2_CPUECTLR_EL1					S3_0_C15_C1_4
 
 /*******************************************************************************
+ * CPU Extended Control register 2 specific definitions
+ ******************************************************************************/
+#define CORTEX_X2_CPUECTLR2_EL1					S3_0_C15_C1_5
+
+#define CORTEX_X2_CPUECTLR2_EL1_PF_MODE_SHIFT			U(11)
+#define CORTEX_X2_CPUECTLR2_EL1_PF_MODE_WIDTH			U(4)
+#define CORTEX_X2_CPUECTLR2_EL1_PF_MODE_CNSRV			ULL(0x9)
+
+/*******************************************************************************
  * CPU Power Control register specific definitions
  ******************************************************************************/
 #define CORTEX_X2_CPUPWRCTLR_EL1				S3_0_C15_C2_7