diff --git a/src/arch/arm/isa/formats/aarch64.isa b/src/arch/arm/isa/formats/aarch64.isa
index 0c6764531b..3c30be6905 100644
--- a/src/arch/arm/isa/formats/aarch64.isa
+++ b/src/arch/arm/isa/formats/aarch64.isa
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2020 ARM Limited
+// Copyright (c) 2011-2021 Arm Limited
 // All rights reserved
 //
 // The license below extends only to copyright in the software and shall
@@ -401,7 +401,16 @@ namespace Aarch64
                           case 0x2:
                             return new Clrex64(machInst);
                           case 0x4:
-                            return new Dsb64(machInst);
+                            switch (bits(crm, 3, 2)) {
+                              case 0x1: // Non-Shareable
+                                return new Dsb64Local(machInst);
+                              case 0x0: // OuterShareable
+                              case 0x2: // InnerShareable
+                              case 0x3: // FullSystem
+                                return new Dsb64Shareable(machInst);
+                              default:
+                                GEM5_UNREACHABLE;
+                            }
                           case 0x5:
                             return new Dmb64(machInst);
                           case 0x6:
diff --git a/src/arch/arm/isa/insts/misc64.isa b/src/arch/arm/isa/insts/misc64.isa
index d516c53374..9151b886b8 100644
--- a/src/arch/arm/isa/insts/misc64.isa
+++ b/src/arch/arm/isa/insts/misc64.isa
@@ -1,6 +1,6 @@
 // -*- mode:c++ -*-
 
-// Copyright (c) 2011-2013, 2016-2018, 2020 ARM Limited
+// Copyright (c) 2011-2013, 2016-2018, 2020-2021 Arm Limited
 // All rights reserved
 //
 // The license below extends only to copyright in the software and shall
@@ -172,12 +172,19 @@ let {{
     decoder_output += BasicConstructor64.subst(isbIop)
     exec_output += BasicExecute.subst(isbIop)
 
-    dsbIop = ArmInstObjParams("dsb", "Dsb64", "ArmStaticInst", "",
-                              ['IsReadBarrier', 'IsWriteBarrier',
-                               'IsSerializeAfter'])
-    header_output += BasicDeclare.subst(dsbIop)
-    decoder_output += BasicConstructor64.subst(dsbIop)
-    exec_output += BasicExecute.subst(dsbIop)
+    dsbLocalIop = ArmInstObjParams("dsb", "Dsb64Local", "ArmStaticInst", "",
+                                   ['IsReadBarrier', 'IsWriteBarrier',
+                                   'IsSerializeAfter'])
+    header_output += BasicDeclare.subst(dsbLocalIop)
+    decoder_output += BasicConstructor64.subst(dsbLocalIop)
+    exec_output += BasicExecute.subst(dsbLocalIop)
+
+    dsbShareableIop = ArmInstObjParams("dsb", "Dsb64Shareable", "ArmStaticInst", "",
+                                       ['IsReadBarrier', 'IsWriteBarrier',
+                                       'IsSerializeAfter'])
+    header_output += BasicDeclare.subst(dsbShareableIop)
+    decoder_output += BasicConstructor64.subst(dsbShareableIop)
+    exec_output += BasicExecute.subst(dsbShareableIop)
 
     dmbIop = ArmInstObjParams("dmb", "Dmb64", "ArmStaticInst", "",
                               ['IsReadBarrier', 'IsWriteBarrier'])