diff --git a/include/arch/aarch64/arch.h b/include/arch/aarch64/arch.h
index e55d33f..37caf09 100644
--- a/include/arch/aarch64/arch.h
+++ b/include/arch/aarch64/arch.h
@@ -261,6 +261,15 @@
 #define ID_AA64ISAR1_SB_SUPPORTED	ULL(0x1)
 #define ID_AA64ISAR1_SB_NOT_SUPPORTED	ULL(0x0)
 
+/* ID_AA64ISAR2_EL1 definitions */
+#define ID_AA64ISAR2_EL1		S3_0_C0_C6_2
+
+#define ID_AA64ISAR2_GPA3_SHIFT		U(8)
+#define ID_AA64ISAR2_GPA3_MASK		ULL(0xf)
+
+#define ID_AA64ISAR2_APA3_SHIFT		U(12)
+#define ID_AA64ISAR2_APA3_MASK		ULL(0xf)
+
 /* ID_AA64MMFR0_EL1 definitions */
 #define ID_AA64MMFR0_EL1_PARANGE_SHIFT	U(0)
 #define ID_AA64MMFR0_EL1_PARANGE_MASK	ULL(0xf)