diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index e3f8215203..e46a766d77 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1587,6 +1587,12 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
         unset_feature(env, ARM_FEATURE_NEON);
 
         t = cpu->isar.id_aa64isar0;
+        t = FIELD_DP64(t, ID_AA64ISAR0, AES, 0);
+        t = FIELD_DP64(t, ID_AA64ISAR0, SHA1, 0);
+        t = FIELD_DP64(t, ID_AA64ISAR0, SHA2, 0);
+        t = FIELD_DP64(t, ID_AA64ISAR0, SHA3, 0);
+        t = FIELD_DP64(t, ID_AA64ISAR0, SM3, 0);
+        t = FIELD_DP64(t, ID_AA64ISAR0, SM4, 0);
         t = FIELD_DP64(t, ID_AA64ISAR0, DP, 0);
         cpu->isar.id_aa64isar0 = t;
 
@@ -1601,6 +1607,9 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
         cpu->isar.id_aa64pfr0 = t;
 
         u = cpu->isar.id_isar5;
+        u = FIELD_DP32(u, ID_ISAR5, AES, 0);
+        u = FIELD_DP32(u, ID_ISAR5, SHA1, 0);
+        u = FIELD_DP32(u, ID_ISAR5, SHA2, 0);
         u = FIELD_DP32(u, ID_ISAR5, RDM, 0);
         u = FIELD_DP32(u, ID_ISAR5, VCMA, 0);
         cpu->isar.id_isar5 = u;