diff --git a/src/mem/hbm_ctrl.cc b/src/mem/hbm_ctrl.cc
index 99618c4b5f..747e714f57 100644
--- a/src/mem/hbm_ctrl.cc
+++ b/src/mem/hbm_ctrl.cc
@@ -150,6 +150,21 @@ HBMCtrl::recvAtomicBackdoor(PacketPtr pkt, MemBackdoorPtr &backdoor)
     return latency;
 }
 
+void
+HBMCtrl::recvMemBackdoorReq(const MemBackdoorReq &req,
+        MemBackdoorPtr &backdoor)
+{
+    auto &range = req.range();
+    if (pc0Int && pc0Int->getAddrRange().isSubset(range)) {
+        pc0Int->getBackdoor(backdoor);
+    } else if (pc1Int && pc1Int->getAddrRange().isSubset(range)) {
+        pc1Int->getBackdoor(backdoor);
+    }
+    else {
+        panic("Can't handle address range for range %s\n", range.to_string());
+    }
+}
+
 bool
 HBMCtrl::writeQueueFullPC0(unsigned int neededEntries) const
 {
diff --git a/src/mem/hbm_ctrl.hh b/src/mem/hbm_ctrl.hh
index c9045f0ae7..a6ecf6c589 100644
--- a/src/mem/hbm_ctrl.hh
+++ b/src/mem/hbm_ctrl.hh
@@ -259,6 +259,8 @@ class HBMCtrl : public MemCtrl
     Tick recvAtomic(PacketPtr pkt) override;
     Tick recvAtomicBackdoor(PacketPtr pkt, MemBackdoorPtr &backdoor) override;
     void recvFunctional(PacketPtr pkt) override;
+    void recvMemBackdoorReq(const MemBackdoorReq &req,
+            MemBackdoorPtr &_backdoor) override;
     bool recvTimingReq(PacketPtr pkt) override;
 
 };
diff --git a/src/mem/thread_bridge.cc b/src/mem/thread_bridge.cc
index 3f76ef49b3..efaf19a0e2 100644
--- a/src/mem/thread_bridge.cc
+++ b/src/mem/thread_bridge.cc
@@ -84,6 +84,14 @@ ThreadBridge::IncomingPort::recvFunctional(PacketPtr pkt)
     device_.out_port_.sendFunctional(pkt);
 }
 
+void
+ThreadBridge::IncomingPort::recvMemBackdoorReq(const MemBackdoorReq &req,
+                                               MemBackdoorPtr &backdoor)
+{
+    EventQueue::ScopedMigration migrate(device_.eventQueue());
+    device_.out_port_.sendMemBackdoorReq(req, backdoor);
+}
+
 ThreadBridge::OutgoingPort::OutgoingPort(const std::string &name,
                                          ThreadBridge &device)
     : RequestPort(name, &device), device_(device)
diff --git a/src/mem/thread_bridge.hh b/src/mem/thread_bridge.hh
index 28c959193c..92cb078dd1 100644
--- a/src/mem/thread_bridge.hh
+++ b/src/mem/thread_bridge.hh
@@ -61,6 +61,8 @@ class ThreadBridge : public SimObject
 
         // FunctionalResponseProtocol
         void recvFunctional(PacketPtr pkt) override;
+        void recvMemBackdoorReq(const MemBackdoorReq &req,
+                                MemBackdoorPtr &backdoor) override;
 
       private:
         ThreadBridge &device_;