diff --git a/src/arch/arm/ArmISA.py b/src/arch/arm/ArmISA.py
index 31ecbcbd15..fbd93b6bf6 100644
--- a/src/arch/arm/ArmISA.py
+++ b/src/arch/arm/ArmISA.py
@@ -54,6 +54,7 @@ class ArmDefaultSERelease(ArmRelease):
         "FEAT_RDM",
         # Armv8.2
         "FEAT_F32MM",
+        "FEAT_F64MM",
         "FEAT_SVE",
         # Armv8.3
         "FEAT_FCMA",
diff --git a/src/arch/arm/ArmSystem.py b/src/arch/arm/ArmSystem.py
index 5a7ae799b7..49dab3e0e2 100644
--- a/src/arch/arm/ArmSystem.py
+++ b/src/arch/arm/ArmSystem.py
@@ -79,6 +79,7 @@ class ArmExtension(ScopedEnum):
         "FEAT_LVA",  # Optional in Armv8.2
         "FEAT_LPA",  # Optional in Armv8.2
         "FEAT_F32MM",  # Optional in Armv8.2
+        "FEAT_F64MM",  # Optional in Armv8.2
         # Armv8.3
         "FEAT_FCMA",
         "FEAT_JSCVT",
@@ -165,6 +166,7 @@ class ArmDefaultRelease(Armv8):
         "FEAT_LPA",
         "FEAT_SVE",
         "FEAT_F32MM",
+        "FEAT_F64MM",
         # Armv8.3
         "FEAT_FCMA",
         "FEAT_JSCVT",
@@ -199,6 +201,7 @@ class Armv82(Armv81):
         "FEAT_LPA",
         "FEAT_SVE",
         "FEAT_F32MM",
+        "FEAT_F64MM",
     ]
 
 
diff --git a/src/arch/arm/process.cc b/src/arch/arm/process.cc
index 24e1250da9..be8dfff330 100644
--- a/src/arch/arm/process.cc
+++ b/src/arch/arm/process.cc
@@ -322,6 +322,7 @@ ArmProcess64::armHwcapImpl2() const
 
     const AA64ZFR0 zf_r0 = tc->readMiscReg(MISCREG_ID_AA64ZFR0_EL1);
     hwcap |= (zf_r0.f32mm >= 1) ? Arm_Svef32mm : Arm_None;
+    hwcap |= (zf_r0.f64mm >= 1) ? Arm_Svef64mm : Arm_None;
 
     return hwcap;
 }
diff --git a/src/arch/arm/regs/misc.cc b/src/arch/arm/regs/misc.cc
index 8925bc00d6..7e53e0dc24 100644
--- a/src/arch/arm/regs/misc.cc
+++ b/src/arch/arm/regs/misc.cc
@@ -5406,6 +5406,7 @@ ISA::initializeMiscRegMetadata()
         .reset([this](){
             AA64ZFR0 zfr0_el1 = 0;
             zfr0_el1.f32mm = release->has(ArmExtension::FEAT_F32MM) ? 1 : 0;
+            zfr0_el1.f64mm = release->has(ArmExtension::FEAT_F64MM) ? 1 : 0;
             return zfr0_el1;
         }())
         .faultRead(EL0, faultIdst)