#define SYS_ID_AA64AFR0_EL1            sys_reg(3, 0, 0, 5, 4)
 #define SYS_ID_AA64AFR1_EL1            sys_reg(3, 0, 0, 5, 5)
 
-#define SYS_ID_AA64ISAR1_EL1           sys_reg(3, 0, 0, 6, 1)
 #define SYS_ID_AA64ISAR2_EL1           sys_reg(3, 0, 0, 6, 2)
 
 #define SYS_ID_AA64MMFR0_EL1           sys_reg(3, 0, 0, 7, 0)
 /* Position the attr at the correct index */
 #define MAIR_ATTRIDX(attr, idx)                ((attr) << ((idx) * 8))
 
-/* id_aa64isar1 */
-#define ID_AA64ISAR1_EL1_I8MM_SHIFT            52
-#define ID_AA64ISAR1_EL1_DGH_SHIFT             48
-#define ID_AA64ISAR1_EL1_BF16_SHIFT            44
-#define ID_AA64ISAR1_EL1_SPECRES_SHIFT         40
-#define ID_AA64ISAR1_EL1_SB_SHIFT              36
-#define ID_AA64ISAR1_EL1_FRINTTS_SHIFT         32
-#define ID_AA64ISAR1_EL1_GPI_SHIFT             28
-#define ID_AA64ISAR1_EL1_GPA_SHIFT             24
-#define ID_AA64ISAR1_EL1_LRCPC_SHIFT           20
-#define ID_AA64ISAR1_EL1_FCMA_SHIFT            16
-#define ID_AA64ISAR1_EL1_JSCVT_SHIFT           12
-#define ID_AA64ISAR1_EL1_API_SHIFT             8
-#define ID_AA64ISAR1_EL1_APA_SHIFT             5
-#define ID_AA64ISAR1_EL1_DPB_SHIFT             0
-
-#define ID_AA64ISAR1_EL1_APA_NI                        0x0
-#define ID_AA64ISAR1_EL1_APA_PAuth             0x1
-#define ID_AA64ISAR1_EL1_APA_ARCH_EPAC         0x2
-#define ID_AA64ISAR1_EL1_APA_Pauth2            0x3
-#define ID_AA64ISAR1_EL1_APA_FPAC              0x4
-#define ID_AA64ISAR1_EL1_APA_FPACCOMBINE       0x5
-#define ID_AA64ISAR1_EL1_API_NI                        0x0
-#define ID_AA64ISAR1_EL1_API_PAuth             0x1
-#define ID_AA64ISAR1_EL1_API_EPAC              0x2
-#define ID_AA64ISAR1_EL1_API_PAuth2            0x3
-#define ID_AA64ISAR1_EL1_API_FPAC              0x4
-#define ID_AA64ISAR1_EL1_API_FPACCOMBINE       0x5
-#define ID_AA64ISAR1_EL1_GPA_NI                        0x0
-#define ID_AA64ISAR1_EL1_GPA_IMP               0x1
-#define ID_AA64ISAR1_EL1_GPI_NI                        0x0
-#define ID_AA64ISAR1_EL1_GPI_IMP               0x1
-
 /* id_aa64isar2 */
 #define ID_AA64ISAR2_EL1_BC_SHIFT              28
 #define ID_AA64ISAR2_EL1_APA3_SHIFT            12