Add capability to enable/disable local memory via debug flags.

Change-Id: Ica388751f4be3afbd2c78a0f169576d2654e1a0f

Author: MichalMrozek

runtime/device/device_caps.cpp

@@ -53,11 +53,11 @@ bool Device::getEnabled64kbPages() {
 };
 
 bool Device::getEnableLocalMemory() {
-    if (DebugManager.flags.EnableLocalMemory.get() == true) {
-        return true;
-    } else {
-        return OSInterface::osEnableLocalMemory && getHardwareCapabilities().localMemorySupported;
+    if (DebugManager.flags.EnableLocalMemory.get() != -1) {
+        return DebugManager.flags.EnableLocalMemory.get();
     }
+
+    return OSInterface::osEnableLocalMemory && getHardwareCapabilities().localMemorySupported;
 };
 
 void Device::setupFp64Flags() {

runtime/os_interface/debug_variables_base.inl

@@ -88,7 +88,7 @@ DECLARE_DEBUG_VARIABLE(bool, EnableComputeWorkSizeSquared, false, "Enables algor
 DECLARE_DEBUG_VARIABLE(bool, EnableVaLibCalls, true, "Enable cl-va sharing lib calls")
 DECLARE_DEBUG_VARIABLE(bool, AddClGlSharing, false, "Add cl-gl extension")
 DECLARE_DEBUG_VARIABLE(bool, EnablePassInlineData, false, "Enable passing of inline data")
-DECLARE_DEBUG_VARIABLE(bool, EnableLocalMemory, false, "Allows allocating graphics memory in Local Memory")
+DECLARE_DEBUG_VARIABLE(int32_t, EnableLocalMemory, -1, "-1: default behavior, 0: disabled, 1: enabled, Allows allocating graphics memory in Local Memory")
 DECLARE_DEBUG_VARIABLE(int32_t, EnableStatelessToStatefulBufferOffsetOpt, -1, "-1: dont override, 0: disable, 1: enable, Enables buffer-offset improvement of the stateless to stateful optimization")
 DECLARE_DEBUG_VARIABLE(int32_t, CreateMultipleDevices, 0, "0: default - disable, 1+: Driver will create multiple (N) devices during initialization.")
 DECLARE_DEBUG_VARIABLE(int32_t, LimitAmountOfReturnedDevices, 0, "0: default - disable, 1+: Driver will limit the number of devices returned from clGetDeviceIds to N.")

unit_tests/device/device_caps_tests.cpp

@@ -863,7 +863,7 @@ TEST_F(DeviceCapsWithModifiedHwInfoTest, GivenLocalMemorySupportedAndOsEnableLoc
     std::unique_ptr<MockDevice> device(MockDevice::createWithNewExecutionEnvironment<MockDevice>(&hwInfoHelper.hwInfo));
     bool orgHwCapsLocalMemorySupported = device->getHardwareCapabilities().localMemorySupported;
 
-    DebugManager.flags.EnableLocalMemory.set(false);
+    DebugManager.flags.EnableLocalMemory.set(0);
 
     device->setHWCapsLocalMemorySupported(false);
     OSInterface::osEnableLocalMemory = false;
@@ -879,9 +879,21 @@ TEST_F(DeviceCapsWithModifiedHwInfoTest, GivenLocalMemorySupportedAndOsEnableLoc
 
     device->setHWCapsLocalMemorySupported(true);
     OSInterface::osEnableLocalMemory = true;
+    EXPECT_FALSE(device->getEnableLocalMemory());
+
+    DebugManager.flags.EnableLocalMemory.set(-1);
     EXPECT_TRUE(device->getEnableLocalMemory());
 
-    DebugManager.flags.EnableLocalMemory.set(true);
+    OSInterface::osEnableLocalMemory = false;
+    EXPECT_FALSE(device->getEnableLocalMemory());
+
+    device->setHWCapsLocalMemorySupported(false);
+    EXPECT_FALSE(device->getEnableLocalMemory());
+
+    DebugManager.flags.EnableLocalMemory.set(1);
+    device->setHWCapsLocalMemorySupported(false);
+    OSInterface::osEnableLocalMemory = false;
+
     EXPECT_TRUE(device->getEnableLocalMemory());
 
     device->setHWCapsLocalMemorySupported(orgHwCapsLocalMemorySupported);

unit_tests/test_files/igdrcl.config

@@ -90,7 +90,7 @@ AddClGlSharing = 0
 EnablePassInlineData = false
 LimitAmountOfReturnedDevices = 0
 UseMallocToObtainHeap32Base = false
-EnableLocalMemory = false
+EnableLocalMemory = -1
 UseAubStream = true
 AubDumpOverrideMmioRegister = 0
 AubDumpOverrideMmioRegisterValue = 0