diff --git a/openmp/libomptarget/src/interface.cpp b/openmp/libomptarget/src/interface.cpp
--- a/openmp/libomptarget/src/interface.cpp
+++ b/openmp/libomptarget/src/interface.cpp
@@ -164,6 +164,19 @@
     DP("Use default device id %" PRId64 "\n", device_id);
   }
 
+  // Proposed behavior for OpenMP 5.2 in OpenMP spec github issue 2669.
+  if (omp_get_num_devices() == 0) {
+    DP("omp_get_num_devices() == 0 but offload is manadatory\n");
+    HandleTargetOutcome(false, loc);
+    return;
+  }
+
+  if (device_id == omp_get_initial_device()) {
+    DP("Device is host (%" PRId64 "), returning as if offload is disabled\n",
+       device_id);
+    return;
+  }
+
   if (CheckDeviceAndCtors(device_id) != OFFLOAD_SUCCESS) {
     DP("Failed to get device %" PRId64 " ready\n", device_id);
     HandleTargetOutcome(false, loc);
@@ -246,6 +259,19 @@
     device_id = omp_get_default_device();
   }
 
+  // Proposed behavior for OpenMP 5.2 in OpenMP spec github issue 2669.
+  if (omp_get_num_devices() == 0) {
+    DP("omp_get_num_devices() == 0 but offload is manadatory\n");
+    HandleTargetOutcome(false, loc);
+    return;
+  }
+
+  if (device_id == omp_get_initial_device()) {
+    DP("Device is host (%" PRId64 "), returning as if offload is disabled\n",
+       device_id);
+    return;
+  }
+
   PM->RTLsMtx.lock();
   size_t DevicesSize = PM->Devices.size();
   PM->RTLsMtx.unlock();
@@ -331,6 +357,19 @@
     device_id = omp_get_default_device();
   }
 
+  // Proposed behavior for OpenMP 5.2 in OpenMP spec github issue 2669.
+  if (omp_get_num_devices() == 0) {
+    DP("omp_get_num_devices() == 0 but offload is manadatory\n");
+    HandleTargetOutcome(false, loc);
+    return;
+  }
+
+  if (device_id == omp_get_initial_device()) {
+    DP("Device is host (%" PRId64 "), returning as if offload is disabled\n",
+       device_id);
+    return;
+  }
+
   if (CheckDeviceAndCtors(device_id) != OFFLOAD_SUCCESS) {
     DP("Failed to get device %" PRId64 " ready\n", device_id);
     HandleTargetOutcome(false, loc);
@@ -399,6 +438,20 @@
     device_id = omp_get_default_device();
   }
 
+  // Proposed behavior for OpenMP 5.2 in OpenMP spec github issue 2669.
+  if (omp_get_num_devices() == 0) {
+    DP("omp_get_num_devices() == 0 but offload is manadatory\n");
+    HandleTargetOutcome(false, loc);
+    return OFFLOAD_FAIL;
+  }
+
+  if (device_id == omp_get_initial_device()) {
+    DP("Device is host (%" PRId64 "), returning OFFLOAD_FAIL as if offload is "
+       "disabled\n",
+       device_id);
+    return OFFLOAD_FAIL;
+  }
+
   if (CheckDeviceAndCtors(device_id) != OFFLOAD_SUCCESS) {
     REPORT("Failed to get device %" PRId64 " ready\n", device_id);
     HandleTargetOutcome(false, loc);
@@ -484,6 +537,20 @@
     device_id = omp_get_default_device();
   }
 
+  // Proposed behavior for OpenMP 5.2 in OpenMP spec github issue 2669.
+  if (omp_get_num_devices() == 0) {
+    DP("omp_get_num_devices() == 0 but offload is manadatory\n");
+    HandleTargetOutcome(false, loc);
+    return OFFLOAD_FAIL;
+  }
+
+  if (device_id == omp_get_initial_device()) {
+    DP("Device is host (%" PRId64 "), returning OFFLOAD_FAIL as if offload is "
+       "disabled\n",
+       device_id);
+    return OFFLOAD_FAIL;
+  }
+
   if (CheckDeviceAndCtors(device_id) != OFFLOAD_SUCCESS) {
     REPORT("Failed to get device %" PRId64 " ready\n", device_id);
     HandleTargetOutcome(false, loc);
@@ -563,6 +630,19 @@
     device_id = omp_get_default_device();
   }
 
+  // Proposed behavior for OpenMP 5.2 in OpenMP spec github issue 2669.
+  if (omp_get_num_devices() == 0) {
+    DP("omp_get_num_devices() == 0 but offload is manadatory\n");
+    HandleTargetOutcome(false, loc);
+    return;
+  }
+
+  if (device_id == omp_get_initial_device()) {
+    DP("Device is host (%" PRId64 "), returning as if offload is disabled\n",
+       device_id);
+    return;
+  }
+
   if (CheckDeviceAndCtors(device_id) != OFFLOAD_SUCCESS) {
     DP("Failed to get device %" PRId64 " ready\n", device_id);
     HandleTargetOutcome(false, loc);
diff --git a/openmp/libomptarget/test/offloading/host_as_target.c b/openmp/libomptarget/test/offloading/host_as_target.c
new file mode 100644
--- /dev/null
+++ b/openmp/libomptarget/test/offloading/host_as_target.c
@@ -0,0 +1,153 @@
+// Check that specifying device as omp_get_initial_device():
+// - Doesn't cause the runtime to fail.
+// - Offloads code to the host.
+// - Doesn't transfer data.  In this case, just check that neither host data nor
+//   default device data are affected by the specified transfers.
+// - Works whether it's specified directly or as the default device.
+
+// RUN: %libomptarget-compile-run-and-check-aarch64-unknown-linux-gnu
+// RUN: %libomptarget-compile-run-and-check-powerpc64-ibm-linux-gnu
+// RUN: %libomptarget-compile-run-and-check-powerpc64le-ibm-linux-gnu
+// RUN: %libomptarget-compile-run-and-check-x86_64-pc-linux-gnu
+// RUN: %libomptarget-compile-run-and-check-nvptx64-nvidia-cuda
+
+#include <stdio.h>
+#include <omp.h>
+
+static void check(char *X, int Dev) {
+  printf("  host X = %c\n", *X);
+  #pragma omp target device(Dev)
+  printf("device X = %c\n", *X);
+}
+
+#define CHECK_DATA() check(&X, DevDefault)
+
+int main(void) {
+  int DevDefault = omp_get_default_device();
+  int DevInit = omp_get_initial_device();
+
+  //--------------------------------------------------
+  // Initialize data on the host and default device.
+  //--------------------------------------------------
+
+  //      CHECK:   host X = h
+  // CHECK-NEXT: device X = d
+  char X = 'd';
+  #pragma omp target enter data map(to:X)
+  X = 'h';
+  CHECK_DATA();
+
+  //--------------------------------------------------
+  // Check behavior when specifying host directly.
+  //--------------------------------------------------
+
+  // CHECK-NEXT: omp_is_initial_device() = 1
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target device(DevInit) map(always,tofrom:X)
+  printf("omp_is_initial_device() = %d\n", omp_is_initial_device());
+  CHECK_DATA();
+
+  // CHECK-NEXT: omp_is_initial_device() = 1
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target teams device(DevInit) num_teams(1) map(always,tofrom:X)
+  printf("omp_is_initial_device() = %d\n", omp_is_initial_device());
+  CHECK_DATA();
+
+  // Check that __kmpc_push_target_tripcount doesn't fail.  I'm not sure how to
+  // check that it actually pushes to the initial device.
+  #pragma omp target teams device(DevInit) num_teams(1)
+  #pragma omp distribute
+  for (int i = 0; i < 2; ++i)
+  ;
+
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target data device(DevInit) map(always,tofrom:X)
+  ;
+  CHECK_DATA();
+
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target enter data device(DevInit) map(always,to:X)
+  ;
+  CHECK_DATA();
+
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target exit data device(DevInit) map(always,from:X)
+  ;
+  CHECK_DATA();
+
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target update device(DevInit) to(X)
+  ;
+  CHECK_DATA();
+
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target update device(DevInit) from(X)
+  ;
+  CHECK_DATA();
+
+  //--------------------------------------------------
+  // Check behavior when device defaults to host.
+  //--------------------------------------------------
+
+  omp_set_default_device(DevInit);
+
+  // CHECK-NEXT: omp_is_initial_device() = 1
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target map(always,tofrom:X)
+  printf("omp_is_initial_device() = %d\n", omp_is_initial_device());
+  CHECK_DATA();
+
+  // CHECK-NEXT: omp_is_initial_device() = 1
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target teams num_teams(1) map(always,tofrom:X)
+  printf("omp_is_initial_device() = %d\n", omp_is_initial_device());
+  CHECK_DATA();
+
+  // Check that __kmpc_push_target_tripcount doesn't fail.  I'm not sure how to
+  // check that it actually pushes to the initial device.
+  #pragma omp target teams num_teams(1)
+  #pragma omp distribute
+  for (int i = 0; i < 2; ++i)
+  ;
+
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target data map(always,tofrom:X)
+  ;
+  CHECK_DATA();
+
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target enter data map(always,to:X)
+  ;
+  CHECK_DATA();
+
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target exit data map(always,from:X)
+  ;
+  CHECK_DATA();
+
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target update to(X)
+  ;
+  CHECK_DATA();
+
+  // CHECK-NEXT:   host X = h
+  // CHECK-NEXT: device X = d
+  #pragma omp target update from(X)
+  ;
+  CHECK_DATA();
+
+  return 0;
+}
diff --git a/openmp/libomptarget/test/offloading/mandatory_but_no_devices.c b/openmp/libomptarget/test/offloading/mandatory_but_no_devices.c
new file mode 100644
--- /dev/null
+++ b/openmp/libomptarget/test/offloading/mandatory_but_no_devices.c
@@ -0,0 +1,54 @@
+// Check that mandatory offloading causes various offloading directives to fail
+// when omp_get_num_devices() == 0 even if the requested device is the initial
+// device.  This behavior is proposed for OpenMP 5.2 in OpenMP spec github
+// issue 2669.
+
+// RUN: %libomptarget-compile-nvptx64-nvidia-cuda -DDIR=target
+// RUN: env OMP_TARGET_OFFLOAD=mandatory CUDA_VISIBLE_DEVICES= \
+// RUN:   %libomptarget-run-fail-nvptx64-nvidia-cuda 2>&1 | \
+// RUN:   %fcheck-nvptx64-nvidia-cuda
+
+// RUN: %libomptarget-compile-nvptx64-nvidia-cuda -DDIR='target teams'
+// RUN: env OMP_TARGET_OFFLOAD=mandatory CUDA_VISIBLE_DEVICES= \
+// RUN:   %libomptarget-run-fail-nvptx64-nvidia-cuda 2>&1 | \
+// RUN:   %fcheck-nvptx64-nvidia-cuda
+
+// RUN: %libomptarget-compile-nvptx64-nvidia-cuda -DDIR='target data map(X)'
+// RUN: env OMP_TARGET_OFFLOAD=mandatory CUDA_VISIBLE_DEVICES= \
+// RUN:   %libomptarget-run-fail-nvptx64-nvidia-cuda 2>&1 | \
+// RUN:   %fcheck-nvptx64-nvidia-cuda
+
+// RUN: %libomptarget-compile-nvptx64-nvidia-cuda \
+// RUN:   -DDIR='target enter data map(to:X)'
+// RUN: env OMP_TARGET_OFFLOAD=mandatory CUDA_VISIBLE_DEVICES= \
+// RUN:   %libomptarget-run-fail-nvptx64-nvidia-cuda 2>&1 | \
+// RUN:   %fcheck-nvptx64-nvidia-cuda
+
+// RUN: %libomptarget-compile-nvptx64-nvidia-cuda \
+// RUN:   -DDIR='target exit data map(from:X)'
+// RUN: env OMP_TARGET_OFFLOAD=mandatory CUDA_VISIBLE_DEVICES= \
+// RUN:   %libomptarget-run-fail-nvptx64-nvidia-cuda 2>&1 | \
+// RUN:   %fcheck-nvptx64-nvidia-cuda
+
+// RUN: %libomptarget-compile-nvptx64-nvidia-cuda \
+// RUN:   -DDIR='target update to(X)'
+// RUN: env OMP_TARGET_OFFLOAD=mandatory CUDA_VISIBLE_DEVICES= \
+// RUN:   %libomptarget-run-fail-nvptx64-nvidia-cuda 2>&1 | \
+// RUN:   %fcheck-nvptx64-nvidia-cuda
+
+// RUN: %libomptarget-compile-nvptx64-nvidia-cuda \
+// RUN:   -DDIR='target update from(X)'
+// RUN: env OMP_TARGET_OFFLOAD=mandatory CUDA_VISIBLE_DEVICES= \
+// RUN:   %libomptarget-run-fail-nvptx64-nvidia-cuda 2>&1 | \
+// RUN:   %fcheck-nvptx64-nvidia-cuda
+
+#include <omp.h>
+#include <stdio.h>
+
+// CHECK: Libomptarget fatal error 1: failure of target construct while offloading is mandatory
+int main(void) {
+  int X;
+  #pragma omp DIR device(omp_get_initial_device())
+  ;
+  return 0;
+}