4 files changed, 9 insertions, 3 deletions
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 646b122..82ff450 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1273,6 +1273,7 @@ static void cortex_m3_initfn(Object *obj)
     cpu->id_isar3 = 0x01111110;
     cpu->id_isar4 = 0x01310102;
     cpu->id_isar5 = 0x00000000;
+    cpu->id_isar6 = 0x00000000;
 }
 
 static void cortex_m4_initfn(Object *obj)
@@ -1299,6 +1300,7 @@ static void cortex_m4_initfn(Object *obj)
     cpu->id_isar3 = 0x01111110;
     cpu->id_isar4 = 0x01310102;
     cpu->id_isar5 = 0x00000000;
+    cpu->id_isar6 = 0x00000000;
 }
 
 static void cortex_m33_initfn(Object *obj)
@@ -1327,6 +1329,7 @@ static void cortex_m33_initfn(Object *obj)
     cpu->id_isar3 = 0x01111131;
     cpu->id_isar4 = 0x01310132;
     cpu->id_isar5 = 0x00000000;
+    cpu->id_isar6 = 0x00000000;
     cpu->clidr = 0x00000000;
     cpu->ctr = 0x8000c000;
 }
@@ -1377,6 +1380,7 @@ static void cortex_r5_initfn(Object *obj)
     cpu->id_isar3 = 0x01112131;
     cpu->id_isar4 = 0x0010142;
     cpu->id_isar5 = 0x0;
+    cpu->id_isar6 = 0x0;
     cpu->mp_is_up = true;
     cpu->pmsav7_dregion = 16;
     define_arm_cp_regs(cpu, cortexr5_cp_reginfo);
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 7ac9094..e310ffc 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -813,6 +813,7 @@ struct ARMCPU {
     uint32_t id_isar3;
     uint32_t id_isar4;
     uint32_t id_isar5;
+    uint32_t id_isar6;
     uint64_t id_aa64pfr0;
     uint64_t id_aa64pfr1;
     uint64_t id_aa64dfr0;
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 8040493..d0581d5 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -139,6 +139,7 @@ static void aarch64_a57_initfn(Object *obj)
     cpu->id_isar3 = 0x01112131;
     cpu->id_isar4 = 0x00011142;
     cpu->id_isar5 = 0x00011121;
+    cpu->id_isar6 = 0;
     cpu->id_aa64pfr0 = 0x00002222;
     cpu->id_aa64dfr0 = 0x10305106;
     cpu->pmceid0 = 0x00000000;
@@ -199,6 +200,7 @@ static void aarch64_a53_initfn(Object *obj)
     cpu->id_isar3 = 0x01112131;
     cpu->id_isar4 = 0x00011142;
     cpu->id_isar5 = 0x00011121;
+    cpu->id_isar6 = 0;
     cpu->id_aa64pfr0 = 0x00002222;
     cpu->id_aa64dfr0 = 0x10305106;
     cpu->id_aa64isar0 = 0x00011120;
diff --git a/target/arm/helper.c b/target/arm/helper.c
index ae70b87..a2ac960 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -4872,11 +4872,10 @@ void register_cp_regs_for_features(ARMCPU *cpu)
               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 6,
               .access = PL1_R, .type = ARM_CP_CONST,
               .resetvalue = cpu->id_mmfr4 },
-            /* 7 is as yet unallocated and must RAZ */
-            { .name = "ID_ISAR7_RESERVED", .state = ARM_CP_STATE_BOTH,
+            { .name = "ID_ISAR6", .state = ARM_CP_STATE_BOTH,
               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 7,
               .access = PL1_R, .type = ARM_CP_CONST,
-              .resetvalue = 0 },
+              .resetvalue = cpu->id_isar6 },
             REGINFO_SENTINEL
         };
         define_arm_cp_regs(cpu, v6_idregs);