diff --git a/openmp/libomptarget/CMakeLists.txt b/openmp/libomptarget/CMakeLists.txt
--- a/openmp/libomptarget/CMakeLists.txt
+++ b/openmp/libomptarget/CMakeLists.txt
@@ -69,7 +69,28 @@
   add_definitions(-DOMPTARGET_DEBUG)
 endif()
 
+# OMPT support for libomptarget
+# Follow host OMPT support and check if host support has been requested.
+# LIBOMP_HAVE_OMPT_SUPPORT indicates whether host OMPT support has been implemented.
+# LIBOMP_OMPT_SUPPORT indicates whether host OMPT support has been requested (default is ON).
+# LIBOMPTARGET_OMPT_SUPPORT indicates whether target OMPT support has been requested (default is ON). 
+set(OMPT_TARGET_DEFAULT FALSE)
+if ((LIBOMP_HAVE_OMPT_SUPPORT) AND (LIBOMP_OMPT_SUPPORT) AND (NOT WIN32))
+  set (OMPT_TARGET_DEFAULT TRUE)
+endif()
+set(LIBOMPTARGET_OMPT_SUPPORT ${OMPT_TARGET_DEFAULT} CACHE BOOL "OMPT-target-support?")
+if ((OMPT_TARGET_DEFAULT) AND (LIBOMPTARGET_OMPT_SUPPORT))
+  add_definitions(-DOMPT_SUPPORT=1)
+  message(STATUS "OMPT target enabled")
+else()
+  message(STATUS "OMPT target disabled")
+endif()
+
+pythonize_bool(LIBOMPTARGET_OMPT_SUPPORT)
+
 set(LIBOMPTARGET_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/include)
+message(STATUS "OpenMP tools dir in libomptarget: ${LIBOMP_OMP_TOOLS_INCLUDE_DIR}")
+include_directories(${LIBOMP_OMP_TOOLS_INCLUDE_DIR})
 
 # Build target agnostic offloading library.
 set(LIBOMPTARGET_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src)
diff --git a/openmp/libomptarget/include/ompt_connector.h b/openmp/libomptarget/include/ompt_connector.h
new file mode 100644
--- /dev/null
+++ b/openmp/libomptarget/include/ompt_connector.h
@@ -0,0 +1,104 @@
+//=== ompt_connector.h - Target independent OpenMP target RTL -- C++ ------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Support used by OMPT implementation to establish communication between
+// various OpenMP runtime libraries: host openmp library, target-independent
+// runtime library, and device-dependent runtime libraries.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _OMPT_CONNECTOR_H
+#define _OMPT_CONNECTOR_H
+
+#ifdef OMPT_SUPPORT
+
+#include "llvm/Support/DynamicLibrary.h"
+
+#include <memory>
+#include <string>
+
+#include "Debug.h"
+#include "omp-tools.h"
+#include "omptarget.h"
+
+#define LIBOMPTARGET_STRINGIFY(s) #s
+
+/// Type for the function to be invoked for connecting two libraries.
+typedef void (*OmptConnectRtnTy)(ompt_start_tool_result_t *result);
+
+/// Establish connection between openmp runtime libraries
+///
+/// This class is used to communicate between an OMPT implementation in
+/// libomptarget and libomp. It is also used to communicate between an
+/// OMPT implementation in a device-specific plugin and
+/// libomptarget. The decision whether OMPT is enabled or not needs to
+/// be made when the library is loaded before any functions in the
+/// library are invoked. For that reason, an instance of this class is
+/// intended to be defined in the constructor for libomptarget or a
+/// plugin so that the decision about whether OMPT is supposed to be
+/// enabled is known before any interface function in the library is
+/// invoked.
+class OmptLibraryConnectorTy {
+public:
+  /// Use \p LibName as the prefix of the global function used for connecting
+  /// two libraries, the source indicated by \p LibName and the destination
+  /// being the one that creates this object.
+  OmptLibraryConnectorTy(const char *Ident) {
+    LibIdent.append(Ident);
+    IsInitialized = false;
+  }
+  OmptLibraryConnectorTy() = delete;
+  /// Use \p OmptResult init to connect the two libraries denoted by this
+  /// object. The init function of \p OmptResult will be used during connection
+  /// and the fini function of \p OmptResult will be used during teardown.
+  void connect(ompt_start_tool_result_t *OmptResult) {
+    initialize();
+    if (!LibConnHandle)
+      return;
+    // Call the function provided by the source library for connect
+    LibConnHandle(OmptResult);
+  }
+
+private:
+  void initialize() {
+    if (IsInitialized)
+      return;
+
+    std::string ErrMsg;
+    std::string LibName = LibIdent;
+    LibName += ".so";
+
+    DP("OMPT: Trying to load library %s\n", LibName.c_str());
+    auto DynLibHandle = std::make_unique<llvm::sys::DynamicLibrary>(
+        llvm::sys::DynamicLibrary::getPermanentLibrary(LibName.c_str(),
+                                                       &ErrMsg));
+    if (!DynLibHandle->isValid()) {
+      // The upper layer will bail out if the handle is null.
+      LibConnHandle = nullptr;
+    } else {
+      auto LibConnRtn = "ompt_" + LibIdent + "_connect";
+      DP("OMPT: Trying to get address of connection routine %s\n",
+         LibConnRtn.c_str());
+      LibConnHandle = reinterpret_cast<OmptConnectRtnTy>(
+          DynLibHandle->getAddressOfSymbol(LibConnRtn.c_str()));
+    }
+    DP("OMPT: Library connection handle = %p\n", LibConnHandle);
+    IsInitialized = true;
+  }
+
+  /// Ensure initialization occurs only once
+  bool IsInitialized;
+  /// Handle of connect routine provided by source library
+  OmptConnectRtnTy LibConnHandle;
+  /// Name of connect routine provided by source library
+  std::string LibIdent;
+};
+
+#endif // OMPT_SUPPORT
+
+#endif // _OMPT_CONNECTOR_H
diff --git a/openmp/libomptarget/src/CMakeLists.txt b/openmp/libomptarget/src/CMakeLists.txt
--- a/openmp/libomptarget/src/CMakeLists.txt
+++ b/openmp/libomptarget/src/CMakeLists.txt
@@ -20,6 +20,7 @@
   interface.cpp
   interop.cpp
   omptarget.cpp
+  ompt_callback.cpp
   rtl.cpp
   LegacyAPI.cpp
 
diff --git a/openmp/libomptarget/src/ompt_callback.cpp b/openmp/libomptarget/src/ompt_callback.cpp
new file mode 100644
--- /dev/null
+++ b/openmp/libomptarget/src/ompt_callback.cpp
@@ -0,0 +1,76 @@
+//===-- ompt_callback.cpp - Target independent OpenMP target RTL -- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Implementation of OMPT callback interfaces for target independent layer
+//
+//===----------------------------------------------------------------------===//
+
+#ifdef OMPT_SUPPORT
+
+#include <assert.h>
+#include <atomic>
+#include <cstdlib>
+#include <cstring>
+
+#include "omp-tools.h"
+#include "ompt_connector.h"
+#include "private.h"
+
+#define fnptr_to_ptr(x) ((void *)(uint64_t)x)
+
+/// Used to indicate whether OMPT was enabled for this library
+bool ompt_enabled = false;
+
+/// This is the function called by the higher layer (libomp) responsible
+/// for initializing OMPT in this library. This is passed to libomp
+/// as part of the OMPT connector object.
+/// \p lookup to be used to query callbacks registered with libomp
+/// \p initial_device_num Initial device num provided by libomp
+/// \p tool_data as provided by the tool
+static int ompt_libomptarget_initialize(ompt_function_lookup_t lookup,
+                                        int initial_device_num,
+                                        ompt_data_t *tool_data) {
+  DP("enter ompt_libomptarget_initialize!\n");
+  ompt_enabled = true;
+  // TODO use the parameters to populate callbacks in libomptarget
+  DP("exit ompt_libomptarget_initialize!\n");
+  return 0;
+}
+
+static void ompt_libomptarget_finalize(ompt_data_t *data) {
+  DP("enter ompt_libomptarget_finalize!\n");
+  ompt_enabled = false;
+  DP("exit ompt_libomptarget_finalize!\n");
+}
+
+/*****************************************************************************
+ * constructor
+ *****************************************************************************/
+/// Used to initialize callbacks implemented by the tool. This interface
+/// will lookup the callbacks table in libomp and assign them to the callbacks
+/// maintained in libomptarget. Using priority 102 to have this constructor
+/// run after the init target library constructor with priority 101 (see
+/// rtl.cpp).
+__attribute__((constructor(102))) static void ompt_init(void) {
+  DP("OMPT: Enter ompt_init\n");
+  // Connect with libomp
+  static OmptLibraryConnectorTy LibompConnector("libomp");
+  static ompt_start_tool_result_t OmptResult;
+
+  // Initialize OmptResult with the init and fini functions that will be
+  // called by the connector
+  OmptResult.initialize = ompt_libomptarget_initialize;
+  OmptResult.finalize = ompt_libomptarget_finalize;
+  OmptResult.tool_data.value = 0;
+
+  // Now call connect that causes the above init/fini functions to be called
+  LibompConnector.connect(&OmptResult);
+  DP("OMPT: Exit ompt_init\n");
+}
+
+#endif // OMPT_SUPPORT
diff --git a/openmp/runtime/CMakeLists.txt b/openmp/runtime/CMakeLists.txt
--- a/openmp/runtime/CMakeLists.txt
+++ b/openmp/runtime/CMakeLists.txt
@@ -419,6 +419,7 @@
 # make these variables available for tools:
 set(LIBOMP_LIBRARY_DIR ${LIBOMP_LIBRARY_DIR} PARENT_SCOPE)
 set(LIBOMP_INCLUDE_DIR ${LIBOMP_INCLUDE_DIR} PARENT_SCOPE)
+set(LIBOMP_OMP_TOOLS_INCLUDE_DIR ${LIBOMP_OMP_TOOLS_INCLUDE_DIR} PARENT_SCOPE)
 # make these variables available for tools/libompd:
 set(LIBOMP_SRC_DIR ${LIBOMP_SRC_DIR} PARENT_SCOPE)
 set(LIBOMP_OMPD_SUPPORT ${LIBOMP_OMPD_SUPPORT} PARENT_SCOPE)
diff --git a/openmp/runtime/cmake/config-ix.cmake b/openmp/runtime/cmake/config-ix.cmake
--- a/openmp/runtime/cmake/config-ix.cmake
+++ b/openmp/runtime/cmake/config-ix.cmake
@@ -330,6 +330,8 @@
   endif()
 endif()
 
+set(LIBOMP_HAVE_OMPT_SUPPORT ${LIBOMP_HAVE_OMPT_SUPPORT} PARENT_SCOPE)
+
 # Check if HWLOC support is available
 if(${LIBOMP_USE_HWLOC})
   find_path(LIBOMP_HWLOC_INCLUDE_DIR NAMES hwloc.h HINTS ${LIBOMP_HWLOC_INSTALL_DIR} PATH_SUFFIXES include)
diff --git a/openmp/runtime/src/CMakeLists.txt b/openmp/runtime/src/CMakeLists.txt
--- a/openmp/runtime/src/CMakeLists.txt
+++ b/openmp/runtime/src/CMakeLists.txt
@@ -391,6 +391,7 @@
   install(FILES ${CMAKE_CURRENT_BINARY_DIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH})
   # install under legacy name ompt.h
   install(FILES ${CMAKE_CURRENT_BINARY_DIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH} RENAME ompt.h)
+  set(LIBOMP_OMP_TOOLS_INCLUDE_DIR ${CMAKE_CURRENT_BINARY_DIR} PARENT_SCOPE)
 endif()
 if(${LIBOMP_FORTRAN_MODULES})
   install(FILES
diff --git a/openmp/runtime/src/exports_so.txt b/openmp/runtime/src/exports_so.txt
--- a/openmp/runtime/src/exports_so.txt
+++ b/openmp/runtime/src/exports_so.txt
@@ -26,6 +26,7 @@
         # OMPT API
         #
         ompt_start_tool;     # OMPT start interface
+        ompt_libomp_connect; # OMPT libomptarget interface
 
         ompc_*;    # omp.h renames some standard functions to ompc_*.
         kmp_*;     # Intel extensions.
diff --git a/openmp/runtime/src/ompt-general.cpp b/openmp/runtime/src/ompt-general.cpp
--- a/openmp/runtime/src/ompt-general.cpp
+++ b/openmp/runtime/src/ompt-general.cpp
@@ -110,6 +110,9 @@
 #define OMPT_DLCLOSE(Lib) dlclose(Lib)
 #endif
 
+/// Used to track the initializer and the finalizer provided by libomptarget
+static ompt_start_tool_result_t *libomptarget_ompt_result = NULL;
+
 /*****************************************************************************
  * forward declarations
  ****************************************************************************/
@@ -456,7 +459,7 @@
   if (verbose_init && verbose_file != stderr && verbose_file != stdout)
     fclose(verbose_file);
 #if OMPT_DEBUG
-  printf("ompt_pre_init(): ompt_enabled = %d\n", ompt_enabled);
+  printf("ompt_pre_init(): ompt_enabled = %d\n", ompt_enabled.enabled);
 #endif
 }
 
@@ -509,12 +512,13 @@
 }
 
 void ompt_fini() {
-  if (ompt_enabled.enabled
-#if OMPD_SUPPORT
-      && ompt_start_tool_result && ompt_start_tool_result->finalize
-#endif
-  ) {
-    ompt_start_tool_result->finalize(&(ompt_start_tool_result->tool_data));
+  if (ompt_enabled.enabled) {
+    if (ompt_start_tool_result && ompt_start_tool_result->finalize) {
+      ompt_start_tool_result->finalize(&(ompt_start_tool_result->tool_data));
+    }
+    if (libomptarget_ompt_result && libomptarget_ompt_result->finalize) {
+      libomptarget_ompt_result->finalize(NULL);
+    }
   }
 
   if (ompt_tool_module)
@@ -869,5 +873,50 @@
 
   FOREACH_OMPT_INQUIRY_FN(ompt_interface_fn)
 
+#undef ompt_interface_fn
+
   return NULL;
 }
+
+/// Lookup function to query libomp callbacks registered by the tool
+static ompt_interface_fn_t ompt_libomp_target_fn_lookup(const char *s) {
+#define ompt_interface_fn(fn, type, code)                                      \
+  if (strcmp(s, #fn) == 0)                                                     \
+    return (ompt_interface_fn_t)ompt_callbacks.ompt_callback(fn);
+
+  FOREACH_OMPT_DEVICE_EVENT(ompt_interface_fn)
+  FOREACH_OMPT_EMI_EVENT(ompt_interface_fn)
+  FOREACH_OMPT_NOEMI_EVENT(ompt_interface_fn)
+
+#undef ompt_interface_fn
+
+  return (ompt_interface_fn_t)0;
+}
+
+/// This function is called by the libomptarget connector to assign
+/// callbacks already registered with libomp.
+_OMP_EXTERN void ompt_libomp_connect(ompt_start_tool_result_t *result) {
+  OMPT_VERBOSE_INIT_PRINT("libomp --> OMPT: Enter libomp_ompt_connect\n");
+
+  // Ensure libomp callbacks have been added if not already
+  __ompt_force_initialization();
+
+  if (ompt_enabled.enabled &&
+      // Callbacks are initiated only if the device initialize callback
+      // has been registered by the tool
+      ompt_callbacks.ompt_callback(ompt_callback_device_initialize)) {
+    if (result) {
+      OMPT_VERBOSE_INIT_PRINT(
+          "libomp --> OMPT: Connecting with libomptarget\n");
+      // Pass in the libomp lookup function so that the already registered
+      // functions can be extracted and assigned to the callbacks in
+      // libomptarget
+      result->initialize(ompt_libomp_target_fn_lookup,
+                         0 /* initial_device_num */, nullptr /* tool_data */);
+      // Track the object provided by libomptarget so that the finalizer can be
+      // called during OMPT finalization
+      libomptarget_ompt_result = result;
+    }
+  }
+  OMPT_VERBOSE_INIT_PRINT("libomp --> OMPT: Exit libomp_ompt_connect\n");
+}
diff --git a/openmp/runtime/src/ompt-specific.h b/openmp/runtime/src/ompt-specific.h
--- a/openmp/runtime/src/ompt-specific.h
+++ b/openmp/runtime/src/ompt-specific.h
@@ -20,6 +20,10 @@
  * forward declarations
  ****************************************************************************/
 
+/// Entrypoint used by libomptarget to register callbacks in libomp, if not
+/// done already
+void __ompt_force_initialization();
+
 void __ompt_team_assign_id(kmp_team_t *team, ompt_data_t ompt_pid);
 void __ompt_thread_assign_wait_id(void *variable);
 
diff --git a/openmp/runtime/src/ompt-specific.cpp b/openmp/runtime/src/ompt-specific.cpp
--- a/openmp/runtime/src/ompt-specific.cpp
+++ b/openmp/runtime/src/ompt-specific.cpp
@@ -188,6 +188,11 @@
 //******************************************************************************
 // interface operations
 //******************************************************************************
+//----------------------------------------------------------
+// initialization support
+//----------------------------------------------------------
+
+void __ompt_force_initialization() { __kmp_serial_initialize(); }
 
 //----------------------------------------------------------
 // thread support