SWDEV-290384 - Add compilation option for direct disaptch

DISABLE_DIRECT_DISPATCH flag will control compilation.
Default is OFF.

Change-Id: I7d4207b8a79f5e3eb61440c5fbe5034c6ce75cce

hipamd/src/CMakeLists.txt

@@ -40,6 +40,8 @@ if(ADDRESS_SANITIZER)
   set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${ASAN_LINKER_FLAGS}")
 endif()
 
+option(DISABLE_DIRECT_DISPATCH "Disable Direct Dispatch" OFF)
+
 option(BUILD_SHARED_LIBS "Build the shared library" ON)
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")
@@ -148,6 +150,10 @@ else()
   target_include_directories(amdhip64 PRIVATE $<TARGET_PROPERTY:rocclr,INCLUDE_DIRECTORIES>)
 endif()
 
+if(DISABLE_DIRECT_DISPATCH)
+  target_compile_definitions(amdhip64 PRIVATE DISABLE_DIRECT_DISPATCH)
+endif()
+
 # Short-Term solution for pre-compiled headers for online compilation
 # Enable pre compiled header
 if(__HIP_ENABLE_PCH)
@@ -296,7 +302,7 @@ add_custom_command(TARGET amdhip64 POST_BUILD COMMAND
 
 add_library(host INTERFACE)
 target_link_libraries(host INTERFACE amdhip64)
-  
+
 add_library(device INTERFACE)
 target_link_libraries(device INTERFACE host)
 

hipamd/src/hip_context.cpp

@@ -39,8 +39,14 @@ void init() {
   if (!amd::Runtime::initialized()) {
     amd::IS_HIP = true;
     GPU_NUM_MEM_DEPENDENCY = 0;
-    AMD_DIRECT_DISPATCH = flagIsDefault(AMD_DIRECT_DISPATCH) ? IS_LINUX : AMD_DIRECT_DISPATCH;
+#if DISABLE_DIRECT_DISPATCH
+    constexpr bool kDirectDispatch = false;
+#else
+    constexpr bool kDirectDispatch = IS_LINUX;
+#endif
+    AMD_DIRECT_DISPATCH = flagIsDefault(AMD_DIRECT_DISPATCH) ? kDirectDispatch : AMD_DIRECT_DISPATCH;
     amd::Runtime::init();
+    LogPrintfInfo("Direct Dispatch: %d", AMD_DIRECT_DISPATCH);
   }
 
   const std::vector<amd::Device*>& devices = amd::Device::getDevices(CL_DEVICE_TYPE_GPU, false);