Add flag to kernel that specifies whether stateless writes are used.

- currently no compiler support yet, hence it returns true.
- minor cleanup of kernel tests.

Change-Id: Ic153810b1a6062d0bae22d6faab5db601764dd98
Signed-off-by: Mrozek, Michal <michal.mrozek@intel.com>

Author: MichalMrozek

runtime/kernel/kernel.h

@@ -393,6 +393,8 @@ class Kernel : public BaseObject<_cl_kernel> {
     void setUnifiedMemoryExecInfo(GraphicsAllocation *argValue);
     void clearUnifiedMemoryExecInfo();
 
+    bool areStatelessWritesUsed() { return containsStatelessWrites; }
+
   protected:
     struct ObjectCounts {
         uint32_t imageCount;
@@ -510,6 +512,7 @@ class Kernel : public BaseObject<_cl_kernel> {
     bool usingSharedObjArgs;
     bool usingImagesOnly = false;
     bool auxTranslationRequired = false;
+    bool containsStatelessWrites = true;
     uint32_t patchedArgumentsNum = 0;
     uint32_t startOffset = 0;
     uint32_t uncacheableArgsCount = 0;

unit_tests/kernel/kernel_tests.cpp

@@ -43,9 +43,6 @@ using namespace DeviceHostQueue;
 
 class KernelTest : public ProgramFromBinaryTest {
   public:
-    KernelTest() {
-    }
-
     ~KernelTest() override = default;
 
   protected:
@@ -101,10 +98,6 @@ TEST_P(KernelTest, getKernelHeap) {
     EXPECT_EQ(pKernel->getKernelInfo().heapInfo.pKernelHeader->KernelHeapSize, pKernel->getKernelHeapSize());
 }
 
-TEST_P(KernelTest, Create_Simple) {
-    // included in the setup of fixture
-}
-
 TEST_P(KernelTest, GetInfo_InvalidParamName) {
     size_t paramValueSizeRet = 0;
 
@@ -2722,6 +2715,12 @@ TEST(KernelTest, givenKernelWithPatchInfoCollectionDisabledWhenPatchWithImplicit
     EXPECT_EQ(0u, kernel.mockKernel->getPatchInfoDataList().size());
 }
 
+TEST(KernelTest, givenDefaultKernelWhenItIsCreatedThenItReportsStatelessWrites) {
+    std::unique_ptr<MockDevice> device(MockDevice::createWithNewExecutionEnvironment<MockDevice>(platformDevices[0]));
+    MockKernelWithInternals kernel(*device);
+    EXPECT_TRUE(kernel.mockKernel->areStatelessWritesUsed());
+}
+
 namespace NEO {
 
 template <typename GfxFamily>