Add debug flag to disable aux translation

Change-Id: I1f3a2941de44e9fe793ef3f1c6425c80293cc63a
Signed-off-by: Dunajski, Bartosz <[email protected]>

Author: BartoszDunajski

runtime/kernel/kernel.cpp

@@ -352,6 +352,10 @@ cl_int Kernel::initialize() {
             }
         }
 
+        if (DebugManager.flags.DisableAuxTranslation.get()) {
+            auxTranslationRequired = false;
+        }
+
         if (usingImages && !usingBuffers) {
             usingImagesOnly = true;
         }

runtime/os_interface/debug_variables_base.inl

@@ -49,6 +49,7 @@ DECLARE_DEBUG_VARIABLE(bool, RebuildPrecompiledKernels, false, "forces driver to
 DECLARE_DEBUG_VARIABLE(bool, LoopAtPlatformInitialize, false, "Adds endless loop in platform initalize, useful for debugging.")
 DECLARE_DEBUG_VARIABLE(bool, DoNotRegisterTrimCallback, false, "When set to true driver is not registering trim callback.")
 DECLARE_DEBUG_VARIABLE(bool, OverrideInvalidEngineWithDefault, false, "When set to true driver chooses engine 0 if no engine is found.")
+DECLARE_DEBUG_VARIABLE(bool, DisableAuxTranslation, false, "Disable aux translation when required by Kernel.")
 
 /*LOGGING FLAGS*/
 DECLARE_DEBUG_VARIABLE(bool, PrintDebugSettings, false, "Enables dumping debug variables settings to text file")

unit_tests/kernel/kernel_tests.cpp

@@ -2395,6 +2395,8 @@ TEST(KernelTest, givenKernelWithKernelInfoWith64bitPointerSizeThenReport64bit) {
 }
 
 TEST(KernelTest, givenFtrRenderCompressedBuffersWhenInitializingArgsWithNonStatefulAccessThenMarkKernelForAuxTranslation) {
+    DebugManagerStateRestore restore;
+    DebugManager.flags.DisableAuxTranslation.set(false);
     std::unique_ptr<MockDevice> device(MockDevice::createWithNewExecutionEnvironment<MockDevice>(nullptr));
     auto hwInfo = device->getExecutionEnvironment()->getMutableHardwareInfo();
     auto &capabilityTable = hwInfo->capabilityTable;
@@ -2416,6 +2418,10 @@ TEST(KernelTest, givenFtrRenderCompressedBuffersWhenInitializingArgsWithNonState
     capabilityTable.ftrRenderCompressedBuffers = true;
     kernel.mockKernel->initialize();
     EXPECT_TRUE(kernel.mockKernel->isAuxTranslationRequired());
+
+    DebugManager.flags.DisableAuxTranslation.set(true);
+    kernel.mockKernel->initialize();
+    EXPECT_FALSE(kernel.mockKernel->isAuxTranslationRequired());
 }
 
 TEST(KernelTest, givenDebugVariableSetWhenKernelHasStatefulBufferAccessThenMarkKernelForAuxTranslation) {

unit_tests/test_files/igdrcl.config

@@ -112,3 +112,4 @@ OverrideInvalidEngineWithDefault = 0
 EnableFormatQuery = 0
 AllowOpenFdOperations = 0
 EnableBlitterOperationsForReadWriteBuffers = 0
+DisableAuxTranslation = 0