#define SYS_MVFR1_EL1                  sys_reg(3, 0, 0, 3, 1)
 #define SYS_MVFR2_EL1                  sys_reg(3, 0, 0, 3, 2)
 
-#define SYS_ID_AA64PFR1_EL1            sys_reg(3, 0, 0, 4, 1)
-
 #define SYS_ID_AA64DFR0_EL1            sys_reg(3, 0, 0, 5, 0)
 #define SYS_ID_AA64DFR1_EL1            sys_reg(3, 0, 0, 5, 1)
 
 #define ID_AA64PFR0_EL1_ELx_64BIT_ONLY         0x1
 #define ID_AA64PFR0_EL1_ELx_32BIT_64BIT                0x2
 
-/* id_aa64pfr1 */
-#define ID_AA64PFR1_EL1_SME_SHIFT      24
-#define ID_AA64PFR1_EL1_MPAM_frac_SHIFT        16
-#define ID_AA64PFR1_EL1_RAS_frac_SHIFT 12
-#define ID_AA64PFR1_EL1_MTE_SHIFT      8
-#define ID_AA64PFR1_EL1_SSBS_SHIFT     4
-#define ID_AA64PFR1_EL1_BT_SHIFT       0
-
-#define ID_AA64PFR1_EL1_SSBS_NI                0
-#define ID_AA64PFR1_EL1_SSBS_IMP       1
-#define ID_AA64PFR1_EL1_SSBS_SSBS2     2
-#define ID_AA64PFR1_EL1_BT_IMP         0x1
-#define ID_AA64PFR1_EL1_SME_IMP                1
-
-#define ID_AA64PFR1_EL1_MTE_NI         0x0
-#define ID_AA64PFR1_EL1_MTE_IMP                0x1
-#define ID_AA64PFR1_EL1_MTE_MTE2       0x2
-#define ID_AA64PFR1_EL1_MTE_MTE3       0x3
-
 /* id_aa64mmfr0 */
 #define ID_AA64MMFR0_EL1_TGRAN4_SUPPORTED_MIN  0x0
 #define ID_AA64MMFR0_EL1_TGRAN4_SUPPORTED_MAX  0x7