arm/cpu: Store aa64dfr0/1 into the idregs array

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Sebastian Ott <sebott@redhat.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Message-id: 20250617153931.1330449-7-cohuck@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/cpu-features.h b/target/arm/cpu-features.h
index 89c9278639bf9acb90ccb09bfdb452ebc407c75b..9517e8a74c831cd7cd062d2b5e975beb32e5942c 100644 (file)
--- a/target/arm/cpu-features.h
+++ b/target/arm/cpu-features.h
@@ -901,30 +901,30 @@ static inline bool isar_feature_aa64_nv2(const ARMISARegisters *id)
 
 static inline bool isar_feature_aa64_pmuv3p1(const ARMISARegisters *id)
 {
-    return FIELD_EX64(id->id_aa64dfr0, ID_AA64DFR0, PMUVER) >= 4 &&
-        FIELD_EX64(id->id_aa64dfr0, ID_AA64DFR0, PMUVER) != 0xf;
+    return FIELD_EX64_IDREG(id, ID_AA64DFR0, PMUVER) >= 4 &&
+        FIELD_EX64_IDREG(id, ID_AA64DFR0, PMUVER) != 0xf;
 }
 
 static inline bool isar_feature_aa64_pmuv3p4(const ARMISARegisters *id)
 {
-    return FIELD_EX64(id->id_aa64dfr0, ID_AA64DFR0, PMUVER) >= 5 &&
-        FIELD_EX64(id->id_aa64dfr0, ID_AA64DFR0, PMUVER) != 0xf;
+    return FIELD_EX64_IDREG(id, ID_AA64DFR0, PMUVER) >= 5 &&
+        FIELD_EX64_IDREG(id, ID_AA64DFR0, PMUVER) != 0xf;
 }
 
 static inline bool isar_feature_aa64_pmuv3p5(const ARMISARegisters *id)
 {
-    return FIELD_EX64(id->id_aa64dfr0, ID_AA64DFR0, PMUVER) >= 6 &&
-        FIELD_EX64(id->id_aa64dfr0, ID_AA64DFR0, PMUVER) != 0xf;
+    return FIELD_EX64_IDREG(id, ID_AA64DFR0, PMUVER) >= 6 &&
+        FIELD_EX64_IDREG(id, ID_AA64DFR0, PMUVER) != 0xf;
 }
 
 static inline bool isar_feature_aa64_debugv8p2(const ARMISARegisters *id)
 {
-    return FIELD_EX64(id->id_aa64dfr0, ID_AA64DFR0, DEBUGVER) >= 8;
+    return FIELD_EX64_IDREG(id, ID_AA64DFR0, DEBUGVER) >= 8;
 }
 
 static inline bool isar_feature_aa64_doublelock(const ARMISARegisters *id)
 {
-    return FIELD_SEX64(id->id_aa64dfr0, ID_AA64DFR0, DOUBLELOCK) >= 0;
+    return FIELD_SEX64_IDREG(id, ID_AA64DFR0, DOUBLELOCK) >= 0;
 }
 
 static inline bool isar_feature_aa64_sve2(const ARMISARegisters *id)

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index d39e8dc956044997fbce9e3d4b4551c8112e05f2..400bee84943903f7494b4502b5aa415c76c83eea 100644 (file)
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -2347,8 +2347,7 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
                 cpu);
 #endif
     } else {
-        cpu->isar.id_aa64dfr0 =
-            FIELD_DP64(cpu->isar.id_aa64dfr0, ID_AA64DFR0, PMUVER, 0);
+        FIELD_DP64_IDREG(isar, ID_AA64DFR0, PMUVER, 0);
         cpu->isar.id_dfr0 = FIELD_DP32(cpu->isar.id_dfr0, ID_DFR0, PERFMON, 0);
         cpu->pmceid0 = 0;
         cpu->pmceid1 = 0;
@@ -2408,19 +2407,15 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
          * try to access the non-existent system registers for them.
          */
         /* FEAT_SPE (Statistical Profiling Extension) */
-        cpu->isar.id_aa64dfr0 =
-            FIELD_DP64(cpu->isar.id_aa64dfr0, ID_AA64DFR0, PMSVER, 0);
+        FIELD_DP64_IDREG(isar, ID_AA64DFR0, PMSVER, 0);
         /* FEAT_TRBE (Trace Buffer Extension) */
-        cpu->isar.id_aa64dfr0 =
-            FIELD_DP64(cpu->isar.id_aa64dfr0, ID_AA64DFR0, TRACEBUFFER, 0);
+        FIELD_DP64_IDREG(isar, ID_AA64DFR0, TRACEBUFFER, 0);
         /* FEAT_TRF (Self-hosted Trace Extension) */
-        cpu->isar.id_aa64dfr0 =
-            FIELD_DP64(cpu->isar.id_aa64dfr0, ID_AA64DFR0, TRACEFILT, 0);
+        FIELD_DP64_IDREG(isar, ID_AA64DFR0, TRACEFILT, 0);
         cpu->isar.id_dfr0 =
             FIELD_DP32(cpu->isar.id_dfr0, ID_DFR0, TRACEFILT, 0);
         /* Trace Macrocell system register access */
-        cpu->isar.id_aa64dfr0 =
-            FIELD_DP64(cpu->isar.id_aa64dfr0, ID_AA64DFR0, TRACEVER, 0);
+        FIELD_DP64_IDREG(isar, ID_AA64DFR0, TRACEVER, 0);
         cpu->isar.id_dfr0 =
             FIELD_DP32(cpu->isar.id_dfr0, ID_DFR0, COPTRC, 0);
         /* Memory mapped trace */

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index df9b7cc8c84cb9352f368c731e329f97cf6fcd38..c7935377c6f8c1fee6d31ee5cb89487cb08f6ca8 100644 (file)
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1074,8 +1074,6 @@ struct ArchCPU {
         uint32_t dbgdidr;
         uint32_t dbgdevid;
         uint32_t dbgdevid1;
-        uint64_t id_aa64dfr0;
-        uint64_t id_aa64dfr1;
         uint64_t id_aa64smfr0;
         uint64_t reset_pmcr_el0;
         uint64_t idregs[NUM_ID_IDX];

diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 500f3646bfadc7c4a5dda714e570e6d700120d47..a215ba8b479c9be4775fa683606203d3e772506a 100644 (file)
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -671,7 +671,7 @@ static void aarch64_a57_initfn(Object *obj)
     cpu->isar.id_isar5 = 0x00011121;
     cpu->isar.id_isar6 = 0;
     SET_IDREG(isar, ID_AA64PFR0, 0x00002222);
-    cpu->isar.id_aa64dfr0 = 0x10305106;
+    SET_IDREG(isar, ID_AA64DFR0, 0x10305106);
     SET_IDREG(isar, ID_AA64ISAR0, 0x00011120);
     SET_IDREG(isar, ID_AA64MMFR0, 0x00001124);
     cpu->isar.dbgdidr = 0x3516d000;
@@ -733,7 +733,7 @@ static void aarch64_a53_initfn(Object *obj)
     cpu->isar.id_isar5 = 0x00011121;
     cpu->isar.id_isar6 = 0;
     SET_IDREG(isar, ID_AA64PFR0, 0x00002222);
-    cpu->isar.id_aa64dfr0 = 0x10305106;
+    SET_IDREG(isar, ID_AA64DFR0, 0x10305106);
     SET_IDREG(isar, ID_AA64ISAR0, 0x00011120);
     SET_IDREG(isar, ID_AA64MMFR0, 0x00001122); /* 40 bit physical addr */
     cpu->isar.dbgdidr = 0x3516d000;

diff --git a/target/arm/helper.c b/target/arm/helper.c
index fe0bda749f44b8442411495679a731dc95c61164..2ac132c1db8342b0ab60c9584ec4fe8325f62ee7 100644 (file)
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7963,12 +7963,12 @@ void register_cp_regs_for_features(ARMCPU *cpu)
               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 0,
               .access = PL1_R, .type = ARM_CP_CONST,
               .accessfn = access_aa64_tid3,
-              .resetvalue = cpu->isar.id_aa64dfr0 },
+              .resetvalue = GET_IDREG(isar, ID_AA64DFR0) },
             { .name = "ID_AA64DFR1_EL1", .state = ARM_CP_STATE_AA64,
               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 1,
               .access = PL1_R, .type = ARM_CP_CONST,
               .accessfn = access_aa64_tid3,
-              .resetvalue = cpu->isar.id_aa64dfr1 },
+              .resetvalue = GET_IDREG(isar, ID_AA64DFR1) },
             { .name = "ID_AA64DFR2_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 2,
               .access = PL1_R, .type = ARM_CP_CONST,

diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 37a6303ec2a4f5572eaeaef6698f484870c625bd..5c95ccc5b8db6f2ba21b0324e1f1c9b14fa333d6 100644 (file)
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -868,8 +868,8 @@ static bool hvf_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
     } regs[] = {
         { HV_SYS_REG_ID_AA64PFR0_EL1, &host_isar.idregs[ID_AA64PFR0_EL1_IDX] },
         { HV_SYS_REG_ID_AA64PFR1_EL1, &host_isar.idregs[ID_AA64PFR1_EL1_IDX] },
-        { HV_SYS_REG_ID_AA64DFR0_EL1, &host_isar.id_aa64dfr0 },
-        { HV_SYS_REG_ID_AA64DFR1_EL1, &host_isar.id_aa64dfr1 },
+        { HV_SYS_REG_ID_AA64DFR0_EL1, &host_isar.idregs[ID_AA64DFR0_EL1_IDX] },
+        { HV_SYS_REG_ID_AA64DFR1_EL1, &host_isar.idregs[ID_AA64DFR1_EL1_IDX] },
         { HV_SYS_REG_ID_AA64ISAR0_EL1, &host_isar.idregs[ID_AA64ISAR0_EL1_IDX] },
         { HV_SYS_REG_ID_AA64ISAR1_EL1, &host_isar.idregs[ID_AA64ISAR1_EL1_IDX] },
         /* Add ID_AA64ISAR2_EL1 here when HVF supports it */

diff --git a/target/arm/internals.h b/target/arm/internals.h
index 3360de9150f7ca33ba5930ca2614b3bbc6414c8d..6216f68c94f1bb81e4e84bf1e99ea804388dbf31 100644 (file)
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1175,7 +1175,7 @@ static inline bool regime_using_lpae_format(CPUARMState *env, ARMMMUIdx mmu_idx)
 static inline int arm_num_brps(ARMCPU *cpu)
 {
     if (arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) {
-        return FIELD_EX64(cpu->isar.id_aa64dfr0, ID_AA64DFR0, BRPS) + 1;
+        return FIELD_EX64_IDREG(&cpu->isar, ID_AA64DFR0, BRPS) + 1;
     } else {
         return FIELD_EX32(cpu->isar.dbgdidr, DBGDIDR, BRPS) + 1;
     }
@@ -1189,7 +1189,7 @@ static inline int arm_num_brps(ARMCPU *cpu)
 static inline int arm_num_wrps(ARMCPU *cpu)
 {
     if (arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) {
-        return FIELD_EX64(cpu->isar.id_aa64dfr0, ID_AA64DFR0, WRPS) + 1;
+        return FIELD_EX64_IDREG(&cpu->isar, ID_AA64DFR0, WRPS) + 1;
     } else {
         return FIELD_EX32(cpu->isar.dbgdidr, DBGDIDR, WRPS) + 1;
     }
@@ -1203,7 +1203,7 @@ static inline int arm_num_wrps(ARMCPU *cpu)
 static inline int arm_num_ctx_cmps(ARMCPU *cpu)
 {
     if (arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) {
-        return FIELD_EX64(cpu->isar.id_aa64dfr0, ID_AA64DFR0, CTX_CMPS) + 1;
+        return FIELD_EX64_IDREG(&cpu->isar, ID_AA64DFR0, CTX_CMPS) + 1;
     } else {
         return FIELD_EX32(cpu->isar.dbgdidr, DBGDIDR, CTX_CMPS) + 1;
     }

diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index 1dde96fbbda7ca107591faca26fa404025db8d57..479e5860e024db11305990aa8ec0a51fcebd8a6f 100644 (file)
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -316,10 +316,8 @@ static bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
         err |= get_host_cpu_reg(fd, ahcf, ID_AA64PFR1_EL1_IDX);
         err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64smfr0,
                               ARM64_SYS_REG(3, 0, 0, 4, 5));
-        err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64dfr0,
-                              ARM64_SYS_REG(3, 0, 0, 5, 0));
-        err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64dfr1,
-                              ARM64_SYS_REG(3, 0, 0, 5, 1));
+        err |= get_host_cpu_reg(fd, ahcf, ID_AA64DFR0_EL1_IDX);
+        err |= get_host_cpu_reg(fd, ahcf, ID_AA64DFR1_EL1_IDX);
         err |= get_host_cpu_reg(fd, ahcf, ID_AA64ISAR0_EL1_IDX);
         err |= get_host_cpu_reg(fd, ahcf, ID_AA64ISAR1_EL1_IDX);
         err |= get_host_cpu_reg(fd, ahcf, ID_AA64ISAR2_EL1_IDX);
@@ -390,10 +388,10 @@ static bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
          * We only do this if the CPU supports AArch32 at EL1.
          */
         if (FIELD_EX32_IDREG(&ahcf->isar, ID_AA64PFR0, EL1) >= 2) {
-            int wrps = FIELD_EX64(ahcf->isar.id_aa64dfr0, ID_AA64DFR0, WRPS);
-            int brps = FIELD_EX64(ahcf->isar.id_aa64dfr0, ID_AA64DFR0, BRPS);
+            int wrps = FIELD_EX64_IDREG(&ahcf->isar, ID_AA64DFR0, WRPS);
+            int brps = FIELD_EX64_IDREG(&ahcf->isar, ID_AA64DFR0, BRPS);
             int ctx_cmps =
-                FIELD_EX64(ahcf->isar.id_aa64dfr0, ID_AA64DFR0, CTX_CMPS);
+                FIELD_EX64_IDREG(&ahcf->isar, ID_AA64DFR0, CTX_CMPS);
             int version = 6; /* ARMv8 debug architecture */
             bool has_el3 =
                 !!FIELD_EX32_IDREG(&ahcf->isar, ID_AA64PFR0, EL3);

diff --git a/target/arm/tcg/cpu64.c b/target/arm/tcg/cpu64.c
index 9efb7f0ce800f661c72ffeee2cc418b62c09bc4b..7e18d31a25359ac0d997cda88ec3274fd10ab05f 100644 (file)
--- a/target/arm/tcg/cpu64.c
+++ b/target/arm/tcg/cpu64.c
@@ -65,8 +65,8 @@ static void aarch64_a35_initfn(Object *obj)
     cpu->isar.id_isar5 = 0x00011121;
     SET_IDREG(isar, ID_AA64PFR0, 0x00002222);
     SET_IDREG(isar, ID_AA64PFR1, 0);
-    cpu->isar.id_aa64dfr0 = 0x10305106;
-    cpu->isar.id_aa64dfr1 = 0;
+    SET_IDREG(isar, ID_AA64DFR0, 0x10305106);
+    SET_IDREG(isar, ID_AA64DFR1, 0);
     SET_IDREG(isar, ID_AA64ISAR0, 0x00011120);
     SET_IDREG(isar, ID_AA64ISAR1, 0);
     SET_IDREG(isar, ID_AA64MMFR0, 0x00101122);
@@ -219,7 +219,7 @@ static void aarch64_a55_initfn(Object *obj)
     cpu->clidr = 0x82000023;
     cpu->ctr = 0x84448004; /* L1Ip = VIPT */
     cpu->dcz_blocksize = 4; /* 64 bytes */
-    cpu->isar.id_aa64dfr0  = 0x0000000010305408ull;
+    SET_IDREG(isar, ID_AA64DFR0, 0x0000000010305408ull);
     SET_IDREG(isar, ID_AA64ISAR0, 0x0000100010211120ull);
     SET_IDREG(isar, ID_AA64ISAR1, 0x0000000000100001ull);
     SET_IDREG(isar, ID_AA64MMFR0, 0x0000000000101122ull);
@@ -310,7 +310,7 @@ static void aarch64_a72_initfn(Object *obj)
     cpu->isar.id_isar4 = 0x00011142;
     cpu->isar.id_isar5 = 0x00011121;
     SET_IDREG(isar, ID_AA64PFR0, 0x00002222);
-    cpu->isar.id_aa64dfr0 = 0x10305106;
+    SET_IDREG(isar, ID_AA64DFR0, 0x10305106);
     SET_IDREG(isar, ID_AA64ISAR0, 0x00011120);
     SET_IDREG(isar, ID_AA64MMFR0, 0x00001124);
     cpu->isar.dbgdidr = 0x3516d000;
@@ -352,7 +352,7 @@ static void aarch64_a76_initfn(Object *obj)
     cpu->clidr = 0x82000023;
     cpu->ctr = 0x8444C004;
     cpu->dcz_blocksize = 4;
-    cpu->isar.id_aa64dfr0  = 0x0000000010305408ull;
+    SET_IDREG(isar, ID_AA64DFR0, 0x0000000010305408ull),
     SET_IDREG(isar, ID_AA64ISAR0, 0x0000100010211120ull);
     SET_IDREG(isar, ID_AA64ISAR1, 0x0000000000100001ull);
     SET_IDREG(isar, ID_AA64MMFR0, 0x0000000000101122ull);
@@ -426,8 +426,8 @@ static void aarch64_a64fx_initfn(Object *obj)
     cpu->reset_sctlr = 0x30000180;
     SET_IDREG(isar, ID_AA64PFR0, 0x0000000101111111); /* No RAS Extensions */
     SET_IDREG(isar, ID_AA64PFR1, 0x0000000000000000);
-    cpu->isar.id_aa64dfr0 = 0x0000000010305408;
-    cpu->isar.id_aa64dfr1 = 0x0000000000000000;
+    SET_IDREG(isar, ID_AA64DFR0, 0x0000000010305408),
+    SET_IDREG(isar, ID_AA64DFR1, 0x0000000000000000),
     cpu->id_aa64afr0 = 0x0000000000000000;
     cpu->id_aa64afr1 = 0x0000000000000000;
     SET_IDREG(isar, ID_AA64MMFR0, 0x0000000000001122);
@@ -600,7 +600,7 @@ static void aarch64_neoverse_n1_initfn(Object *obj)
     cpu->clidr = 0x82000023;
     cpu->ctr = 0x8444c004;
     cpu->dcz_blocksize = 4;
-    cpu->isar.id_aa64dfr0  = 0x0000000110305408ull;
+    SET_IDREG(isar, ID_AA64DFR0, 0x0000000110305408ull);
     SET_IDREG(isar, ID_AA64ISAR0, 0x0000100010211120ull);
     SET_IDREG(isar, ID_AA64ISAR1, 0x0000000000100001ull);
     SET_IDREG(isar, ID_AA64MMFR0, 0x0000000000101125ull);
@@ -678,8 +678,8 @@ static void aarch64_neoverse_v1_initfn(Object *obj)
     cpu->dcz_blocksize = 4;
     cpu->id_aa64afr0 = 0x00000000;
     cpu->id_aa64afr1 = 0x00000000;
-    cpu->isar.id_aa64dfr0  = 0x000001f210305519ull;
-    cpu->isar.id_aa64dfr1 = 0x00000000;
+    SET_IDREG(isar, ID_AA64DFR0, 0x000001f210305519ull),
+    SET_IDREG(isar, ID_AA64DFR1, 0x00000000),
     SET_IDREG(isar, ID_AA64ISAR0, 0x1011111110212120ull); /* with FEAT_RNG */
     SET_IDREG(isar, ID_AA64ISAR1, 0x0011000001211032ull);
     SET_IDREG(isar, ID_AA64MMFR0, 0x0000000000101125ull);
@@ -925,8 +925,8 @@ static void aarch64_a710_initfn(Object *obj)
     SET_IDREG(isar, ID_AA64PFR0, 0x1201111120111112ull); /* GIC filled in later */
     SET_IDREG(isar, ID_AA64PFR1, 0x0000000000000221ull);
     SET_IDREG(isar, ID_AA64ZFR0, 0x0000110100110021ull); /* with Crypto */
-    cpu->isar.id_aa64dfr0  = 0x000011f010305619ull;
-    cpu->isar.id_aa64dfr1  = 0;
+    SET_IDREG(isar, ID_AA64DFR0, 0x000011f010305619ull);
+    SET_IDREG(isar, ID_AA64DFR1, 0);
     cpu->id_aa64afr0       = 0;
     cpu->id_aa64afr1       = 0;
     SET_IDREG(isar, ID_AA64ISAR0, 0x0221111110212120ull); /* with Crypto */
@@ -1027,8 +1027,8 @@ static void aarch64_neoverse_n2_initfn(Object *obj)
     SET_IDREG(isar, ID_AA64PFR0, 0x1201111120111112ull); /* GIC filled in later */
     SET_IDREG(isar, ID_AA64PFR1, 0x0000000000000221ull);
     SET_IDREG(isar, ID_AA64ZFR0, 0x0000110100110021ull); /* with Crypto */
-    cpu->isar.id_aa64dfr0  = 0x000011f210305619ull;
-    cpu->isar.id_aa64dfr1  = 0;
+    SET_IDREG(isar, ID_AA64DFR0, 0x000011f210305619ull);
+    SET_IDREG(isar, ID_AA64DFR1, 0);
     cpu->id_aa64afr0       = 0;
     cpu->id_aa64afr1       = 0;
     SET_IDREG(isar, ID_AA64ISAR0, 0x1221111110212120ull); /* with Crypto and FEAT_RNG */
@@ -1261,11 +1261,11 @@ void aarch64_max_tcg_initfn(Object *obj)
     t = FIELD_DP64(t, ID_AA64ZFR0, F64MM, 1);     /* FEAT_F64MM */
     SET_IDREG(isar, ID_AA64ZFR0, t);
 
-    t = cpu->isar.id_aa64dfr0;
+    t = GET_IDREG(isar, ID_AA64DFR0);
     t = FIELD_DP64(t, ID_AA64DFR0, DEBUGVER, 10); /* FEAT_Debugv8p8 */
     t = FIELD_DP64(t, ID_AA64DFR0, PMUVER, 6);    /* FEAT_PMUv3p5 */
     t = FIELD_DP64(t, ID_AA64DFR0, HPMN0, 1);     /* FEAT_HPMN0 */
-    cpu->isar.id_aa64dfr0 = t;
+    SET_IDREG(isar, ID_AA64DFR0, t);
 
     t = cpu->isar.id_aa64smfr0;
     t = FIELD_DP64(t, ID_AA64SMFR0, F32F32, 1);   /* FEAT_SME */