diff --git a/include/lib/aarch32/arch.h b/include/lib/aarch32/arch.h
index 3e5e3fb..fa6e5db 100644
--- a/include/lib/aarch32/arch.h
+++ b/include/lib/aarch32/arch.h
@@ -132,6 +132,7 @@
 #define SCTLR_TRE_BIT		(U(1) << 28)
 #define SCTLR_AFE_BIT		(U(1) << 29)
 #define SCTLR_TE_BIT		(U(1) << 30)
+#define SCTLR_DSSBS_BIT		(U(1) << 31)
 #define SCTLR_RESET_VAL         (SCTLR_RES1 | SCTLR_NTWE_BIT |		\
 				SCTLR_NTWI_BIT | SCTLR_CP15BEN_BIT)
 
diff --git a/include/lib/aarch64/arch.h b/include/lib/aarch64/arch.h
index d7867bc..97595e9 100644
--- a/include/lib/aarch64/arch.h
+++ b/include/lib/aarch64/arch.h
@@ -198,6 +198,12 @@
 #define ID_AA64MMFR0_EL1_TGRAN16_SUPPORTED	ULL(0x1)
 #define ID_AA64MMFR0_EL1_TGRAN16_NOT_SUPPORTED	ULL(0x0)
 
+/* ID_AA64PFR1_EL1 definitions */
+#define ID_AA64PFR1_EL1_SSBS_SHIFT	U(4)
+#define ID_AA64PFR1_EL1_SSBS_MASK	ULL(0xf)
+
+#define SSBS_UNAVAILABLE	ULL(0)	/* No architectural SSBS support */
+
 /* ID_PFR1_EL1 definitions */
 #define ID_PFR1_VIRTEXT_SHIFT	U(12)
 #define ID_PFR1_VIRTEXT_MASK	U(0xf)
@@ -219,29 +225,30 @@
 			(U(1) << 22) | (U(1) << 18) | (U(1) << 16) | \
 			(U(1) << 11) | (U(1) << 5) | (U(1) << 4))
 
-#define SCTLR_M_BIT		(U(1) << 0)
-#define SCTLR_A_BIT		(U(1) << 1)
-#define SCTLR_C_BIT		(U(1) << 2)
-#define SCTLR_SA_BIT		(U(1) << 3)
-#define SCTLR_SA0_BIT		(U(1) << 4)
-#define SCTLR_CP15BEN_BIT	(U(1) << 5)
-#define SCTLR_ITD_BIT		(U(1) << 7)
-#define SCTLR_SED_BIT		(U(1) << 8)
-#define SCTLR_UMA_BIT		(U(1) << 9)
-#define SCTLR_I_BIT		(U(1) << 12)
-#define SCTLR_V_BIT		(U(1) << 13)
-#define SCTLR_DZE_BIT		(U(1) << 14)
-#define SCTLR_UCT_BIT		(U(1) << 15)
-#define SCTLR_NTWI_BIT		(U(1) << 16)
-#define SCTLR_NTWE_BIT		(U(1) << 18)
-#define SCTLR_WXN_BIT		(U(1) << 19)
-#define SCTLR_UWXN_BIT		(U(1) << 20)
-#define SCTLR_E0E_BIT		(U(1) << 24)
-#define SCTLR_EE_BIT		(U(1) << 25)
-#define SCTLR_UCI_BIT		(U(1) << 26)
-#define SCTLR_TRE_BIT		(U(1) << 28)
-#define SCTLR_AFE_BIT		(U(1) << 29)
-#define SCTLR_TE_BIT		(U(1) << 30)
+#define SCTLR_M_BIT		(ULL(1) << 0)
+#define SCTLR_A_BIT		(ULL(1) << 1)
+#define SCTLR_C_BIT		(ULL(1) << 2)
+#define SCTLR_SA_BIT		(ULL(1) << 3)
+#define SCTLR_SA0_BIT		(ULL(1) << 4)
+#define SCTLR_CP15BEN_BIT	(ULL(1) << 5)
+#define SCTLR_ITD_BIT		(ULL(1) << 7)
+#define SCTLR_SED_BIT		(ULL(1) << 8)
+#define SCTLR_UMA_BIT		(ULL(1) << 9)
+#define SCTLR_I_BIT		(ULL(1) << 12)
+#define SCTLR_V_BIT		(ULL(1) << 13)
+#define SCTLR_DZE_BIT		(ULL(1) << 14)
+#define SCTLR_UCT_BIT		(ULL(1) << 15)
+#define SCTLR_NTWI_BIT		(ULL(1) << 16)
+#define SCTLR_NTWE_BIT		(ULL(1) << 18)
+#define SCTLR_WXN_BIT		(ULL(1) << 19)
+#define SCTLR_UWXN_BIT		(ULL(1) << 20)
+#define SCTLR_E0E_BIT		(ULL(1) << 24)
+#define SCTLR_EE_BIT		(ULL(1) << 25)
+#define SCTLR_UCI_BIT		(ULL(1) << 26)
+#define SCTLR_TRE_BIT		(ULL(1) << 28)
+#define SCTLR_AFE_BIT		(ULL(1) << 29)
+#define SCTLR_TE_BIT		(ULL(1) << 30)
+#define SCTLR_DSSBS_BIT		(ULL(1) << 44)
 #define SCTLR_RESET_VAL		SCTLR_EL3_RES1
 
 /* CPACR_El1 definitions */