Add helper function to detect if hw mode is selected

Related-To: NEO-4208
Change-Id: Iac34e9e9cea36d7ab354d7d5b5c716e8ea3a483d
Signed-off-by: Mateusz Jablonski <mateusz.jablonski@intel.com>

core/os_interface/device_factory.cpp

@@ -64,4 +64,15 @@ bool DeviceFactory::getDevicesForProductFamilyOverride(size_t &numDevices, Execu
     return true;
 }
 
+bool DeviceFactory::isHwModeSelected() {
+    int32_t csr = DebugManager.flags.SetCommandStreamReceiver.get();
+    switch (csr) {
+    case CSR_AUB:
+    case CSR_TBX:
+    case CSR_TBX_WITH_AUB:
+        return false;
+    default:
+        return true;
+    }
+}
 } // namespace NEO

core/os_interface/device_factory.h

@@ -17,6 +17,7 @@ class DeviceFactory {
     static bool getDevices(size_t &numDevices, ExecutionEnvironment &executionEnvironment);
     static bool getDevicesForProductFamilyOverride(size_t &numDevices, ExecutionEnvironment &executionEnvironment);
     static void releaseDevices();
+    static bool isHwModeSelected();
 
   protected:
     static size_t numDevices;

runtime/command_stream/create_command_stream_impl.cpp

@@ -48,25 +48,10 @@ CommandStreamReceiver *createCommandStreamImpl(ExecutionEnvironment &executionEn
 }
 
 bool getDevicesImpl(size_t &numDevicesReturned, ExecutionEnvironment &executionEnvironment) {
-    bool result;
+    if (DeviceFactory::isHwModeSelected()) {
-    int32_t csr = DebugManager.flags.SetCommandStreamReceiver.get();
-    if (csr < 0) {
-        csr = CommandStreamReceiverType::CSR_HW;
-    }
-    switch (csr) {
-    case CSR_HW:
-        result = DeviceFactory::getDevices(numDevicesReturned, executionEnvironment);
-        DEBUG_BREAK_IF(!result);
-        return result;
-    case CSR_AUB:
-    case CSR_TBX:
-    case CSR_TBX_WITH_AUB:
-        return DeviceFactory::getDevicesForProductFamilyOverride(numDevicesReturned, executionEnvironment);
-    case CSR_HW_WITH_AUB:
         return DeviceFactory::getDevices(numDevicesReturned, executionEnvironment);
-    default:
-        return false;
     }
+    return DeviceFactory::getDevicesForProductFamilyOverride(numDevicesReturned, executionEnvironment);
 }
 
 } // namespace NEO

unit_tests/os_interface/device_factory_tests.cpp

@@ -227,3 +227,21 @@ TEST_F(DeviceFactoryTest, givenGetDevicesCallWhenItIsDoneThenOsInterfaceIsAlloca
     EXPECT_TRUE(success);
     EXPECT_NE(nullptr, executionEnvironment->rootDeviceEnvironments[0]->osInterface);
 }
+
+TEST(DeviceFactory, givenHwModeSelectedWhenIsHwModeSelectedIsCalledThenTrueIsReturned) {
+    DebugManagerStateRestore stateRestore;
+    constexpr int32_t hwModes[] = {-1, CommandStreamReceiverType::CSR_HW, CommandStreamReceiverType::CSR_HW_WITH_AUB};
+    for (const auto &hwMode : hwModes) {
+        DebugManager.flags.SetCommandStreamReceiver.set(hwMode);
+        EXPECT_TRUE(DeviceFactory::isHwModeSelected());
+    }
+}
+
+TEST(DeviceFactory, givenNonHwModeSelectedWhenIsHwModeSelectedIsCalledThenFalseIsReturned) {
+    DebugManagerStateRestore stateRestore;
+    constexpr int32_t nonHwModes[] = {CommandStreamReceiverType::CSR_AUB, CommandStreamReceiverType::CSR_TBX, CommandStreamReceiverType::CSR_TBX_WITH_AUB};
+    for (const auto &nonHwMode : nonHwModes) {
+        DebugManager.flags.SetCommandStreamReceiver.set(nonHwMode);
+        EXPECT_FALSE(DeviceFactory::isHwModeSelected());
+    }
+}