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diff --git a/src/VBox/Main/src-server/TrustedPlatformModuleImpl.cpp b/src/VBox/Main/src-server/TrustedPlatformModuleImpl.cpp
new file mode 100644
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+++ b/src/VBox/Main/src-server/TrustedPlatformModuleImpl.cpp
@@ -0,0 +1,367 @@
+/* $Id: TrustedPlatformModuleImpl.cpp $ */
+/** @file
+ * VirtualBox COM class implementation - Machine Trusted Platform Module settings.
+ */
+
+/*
+ * Copyright (C) 2021-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#define LOG_GROUP LOG_GROUP_MAIN_TRUSTEDPLATFORMMODULE
+#include "TrustedPlatformModuleImpl.h"
+#include "MachineImpl.h"
+#include "GuestOSTypeImpl.h"
+
+#include <iprt/cpp/utils.h>
+#include <VBox/settings.h>
+
+#include "AutoStateDep.h"
+#include "AutoCaller.h"
+#include "LoggingNew.h"
+
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// TrustedPlatformModule private data definition
+//
+////////////////////////////////////////////////////////////////////////////////
+
+struct TrustedPlatformModule::Data
+{
+    Data()
+        : pMachine(NULL)
+    { }
+
+    Machine * const                   pMachine;
+    ComObjPtr<TrustedPlatformModule>  pPeer;
+
+    // use the XML settings structure in the members for simplicity
+    Backupable<settings::TpmSettings> bd;
+};
+
+// constructor / destructor
+/////////////////////////////////////////////////////////////////////////////
+
+DEFINE_EMPTY_CTOR_DTOR(TrustedPlatformModule)
+
+HRESULT TrustedPlatformModule::FinalConstruct()
+{
+    return BaseFinalConstruct();
+}
+
+void TrustedPlatformModule::FinalRelease()
+{
+    uninit();
+    BaseFinalRelease();
+}
+
+// public initializer/uninitializer for internal purposes only
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Initializes the BIOS settings object.
+ *
+ * @returns COM result indicator
+ */
+HRESULT TrustedPlatformModule::init(Machine *aParent)
+{
+    LogFlowThisFuncEnter();
+    LogFlowThisFunc(("aParent: %p\n", aParent));
+
+    ComAssertRet(aParent, E_INVALIDARG);
+
+    /* Enclose the state transition NotReady->InInit->Ready */
+    AutoInitSpan autoInitSpan(this);
+    AssertReturn(autoInitSpan.isOk(), E_FAIL);
+
+    m = new Data();
+
+    /* share the parent weakly */
+    unconst(m->pMachine) = aParent;
+
+    m->bd.allocate();
+
+    autoInitSpan.setSucceeded();
+
+    LogFlowThisFuncLeave();
+    return S_OK;
+}
+
+/**
+ *  Initializes the Trusted Platform Module settings object given another Trusted Platform Module settings object
+ *  (a kind of copy constructor). This object shares data with
+ *  the object passed as an argument.
+ *
+ *  @note This object must be destroyed before the original object
+ *  it shares data with is destroyed.
+ */
+HRESULT TrustedPlatformModule::init(Machine *aParent, TrustedPlatformModule *that)
+{
+    LogFlowThisFuncEnter();
+    LogFlowThisFunc(("aParent: %p, that: %p\n", aParent, that));
+
+    ComAssertRet(aParent && that, E_INVALIDARG);
+
+    /* Enclose the state transition NotReady->InInit->Ready */
+    AutoInitSpan autoInitSpan(this);
+    AssertReturn(autoInitSpan.isOk(), E_FAIL);
+
+    m = new Data();
+
+    unconst(m->pMachine) = aParent;
+    m->pPeer = that;
+
+    AutoWriteLock thatlock(that COMMA_LOCKVAL_SRC_POS);
+    m->bd.share(that->m->bd);
+
+    autoInitSpan.setSucceeded();
+
+    LogFlowThisFuncLeave();
+    return S_OK;
+}
+
+/**
+ *  Initializes the guest object given another guest object
+ *  (a kind of copy constructor). This object makes a private copy of data
+ *  of the original object passed as an argument.
+ */
+HRESULT TrustedPlatformModule::initCopy(Machine *aParent, TrustedPlatformModule *that)
+{
+    LogFlowThisFuncEnter();
+    LogFlowThisFunc(("aParent: %p, that: %p\n", aParent, that));
+
+    ComAssertRet(aParent && that, E_INVALIDARG);
+
+    /* Enclose the state transition NotReady->InInit->Ready */
+    AutoInitSpan autoInitSpan(this);
+    AssertReturn(autoInitSpan.isOk(), E_FAIL);
+
+    m = new Data();
+
+    unconst(m->pMachine) = aParent;
+    // mPeer is left null
+
+    AutoWriteLock thatlock(that COMMA_LOCKVAL_SRC_POS);
+    m->bd.attachCopy(that->m->bd);
+
+    autoInitSpan.setSucceeded();
+
+    LogFlowThisFuncLeave();
+    return S_OK;
+}
+
+/**
+ *  Uninitializes the instance and sets the ready flag to FALSE.
+ *  Called either from FinalRelease() or by the parent when it gets destroyed.
+ */
+void TrustedPlatformModule::uninit()
+{
+    LogFlowThisFuncEnter();
+
+    /* Enclose the state transition Ready->InUninit->NotReady */
+    AutoUninitSpan autoUninitSpan(this);
+    if (autoUninitSpan.uninitDone())
+        return;
+
+    m->bd.free();
+
+    unconst(m->pPeer) = NULL;
+    unconst(m->pMachine) = NULL;
+
+    delete m;
+    m = NULL;
+
+    LogFlowThisFuncLeave();
+}
+
+// ITrustedPlatformModule properties
+/////////////////////////////////////////////////////////////////////////////
+
+
+HRESULT TrustedPlatformModule::getType(TpmType_T *aType)
+{
+    AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
+
+    *aType = m->bd->tpmType;
+
+    return S_OK;
+}
+
+HRESULT TrustedPlatformModule::setType(TpmType_T aType)
+{
+    /* the machine needs to be mutable */
+    AutoMutableStateDependency adep(m->pMachine);
+    if (FAILED(adep.hrc())) return adep.hrc();
+
+    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
+
+    m->bd.backup();
+    m->bd->tpmType = aType;
+
+    alock.release();
+    AutoWriteLock mlock(m->pMachine COMMA_LOCKVAL_SRC_POS);  // mParent is const, needs no locking
+    m->pMachine->i_setModified(Machine::IsModified_TrustedPlatformModule);
+
+    return S_OK;
+}
+
+HRESULT TrustedPlatformModule::getLocation(com::Utf8Str &location)
+{
+    AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
+
+    location = m->bd->strLocation;
+    return S_OK;
+}
+
+HRESULT TrustedPlatformModule::setLocation(const com::Utf8Str &location)
+{
+    /* the machine needs to be mutable */
+    AutoMutableStateDependency adep(m->pMachine);
+    if (FAILED(adep.hrc())) return adep.hrc();
+
+    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
+
+    m->bd.backup();
+    m->bd->strLocation = location;
+
+    alock.release();
+    AutoWriteLock mlock(m->pMachine COMMA_LOCKVAL_SRC_POS);  // mParent is const, needs no locking
+    m->pMachine->i_setModified(Machine::IsModified_TrustedPlatformModule);
+
+    return S_OK;
+}
+
+
+// ITrustedPlatformModule methods
+/////////////////////////////////////////////////////////////////////////////
+
+// public methods only for internal purposes
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ *  Loads settings from the given machine node.
+ *  May be called once right after this object creation.
+ *
+ *  @param data Configuration settings.
+ *
+ *  @note Locks this object for writing.
+ */
+HRESULT TrustedPlatformModule::i_loadSettings(const settings::TpmSettings &data)
+{
+    AutoCaller autoCaller(this);
+    AssertComRCReturnRC(autoCaller.hrc());
+
+    AutoReadLock mlock(m->pMachine COMMA_LOCKVAL_SRC_POS);
+    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
+
+    // simply copy
+    m->bd.assignCopy(&data);
+    return S_OK;
+}
+
+/**
+ *  Saves settings to the given machine node.
+ *
+ *  @param data Configuration settings.
+ *
+ *  @note Locks this object for reading.
+ */
+HRESULT TrustedPlatformModule::i_saveSettings(settings::TpmSettings &data)
+{
+    AutoCaller autoCaller(this);
+    AssertComRCReturnRC(autoCaller.hrc());
+
+    AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
+
+    data = *m->bd.data();
+
+    return S_OK;
+}
+
+void TrustedPlatformModule::i_rollback()
+{
+    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
+    m->bd.rollback();
+}
+
+void TrustedPlatformModule::i_commit()
+{
+    /* sanity */
+    AutoCaller autoCaller(this);
+    AssertComRCReturnVoid(autoCaller.hrc());
+
+    /* sanity too */
+    AutoCaller peerCaller(m->pPeer);
+    AssertComRCReturnVoid(peerCaller.hrc());
+
+    /* lock both for writing since we modify both (mPeer is "master" so locked
+     * first) */
+    AutoMultiWriteLock2 alock(m->pPeer, this COMMA_LOCKVAL_SRC_POS);
+
+    if (m->bd.isBackedUp())
+    {
+        m->bd.commit();
+        if (m->pPeer)
+        {
+            /* attach new data to the peer and reshare it */
+            AutoWriteLock peerlock(m->pPeer COMMA_LOCKVAL_SRC_POS);
+            m->pPeer->m->bd.attach(m->bd);
+        }
+    }
+}
+
+void TrustedPlatformModule::i_copyFrom(TrustedPlatformModule *aThat)
+{
+    AssertReturnVoid(aThat != NULL);
+
+    /* sanity */
+    AutoCaller autoCaller(this);
+    AssertComRCReturnVoid(autoCaller.hrc());
+
+    /* sanity too */
+    AutoCaller thatCaller(aThat);
+    AssertComRCReturnVoid(thatCaller.hrc());
+
+    /* peer is not modified, lock it for reading (aThat is "master" so locked
+     * first) */
+    AutoReadLock rl(aThat COMMA_LOCKVAL_SRC_POS);
+    AutoWriteLock wl(this COMMA_LOCKVAL_SRC_POS);
+
+    /* this will back up current data */
+    m->bd.assignCopy(aThat->m->bd);
+}
+
+void TrustedPlatformModule::i_applyDefaults(GuestOSType *aOsType)
+{
+    /* sanity */
+    AutoCaller autoCaller(this);
+    AssertComRCReturnVoid(autoCaller.hrc());
+
+    AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
+
+    /* Initialize default TPM settings here */
+    if (aOsType)
+        m->bd->tpmType = aOsType->i_recommendedTpm2() ? TpmType_v2_0 : TpmType_None;
+    else
+        m->bd->tpmType = TpmType_None;
+}
+
+/* vi: set tabstop=4 shiftwidth=4 expandtab: */