Page fault support to be controlled with the registry key

Signed-off-by: Milczarek, Slawomir <slawomir.milczarek@intel.com>

shared/source/os_interface/linux/CMakeLists.txt

@@ -41,7 +41,6 @@ set(NEO_CORE_OS_INTERFACE_LINUX
     ${CMAKE_CURRENT_SOURCE_DIR}/drm_memory_operations_handler_default.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/drm_memory_operations_handler_default.h
     ${CMAKE_CURRENT_SOURCE_DIR}/drm_memory_manager_create_multi_host_allocation.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}${BRANCH_DIR_SUFFIX}drm_query.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/hw_info_config_drm.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/hw_device_id.h
     ${CMAKE_CURRENT_SOURCE_DIR}/hw_device_id_linux.cpp

shared/source/os_interface/linux/drm_neo.cpp

@@ -1211,6 +1211,14 @@ void Drm::queryPageFaultSupport() {
     }
 }
 
+bool Drm::hasPageFaultSupport() const {
+    if (DebugManager.flags.EnableRecoverablePageFaults.get() != -1) {
+        return !!DebugManager.flags.EnableRecoverablePageFaults.get();
+    }
+
+    return false;
+}
+
 unsigned int Drm::bindDrmContext(uint32_t drmContextId, uint32_t deviceIndex, aub_stream::EngineType engineType, bool engineInstancedDevice) {
     auto engineInfo = this->engineInfo.get();
     if (!engineInfo) {

shared/source/os_interface/linux/drm_query.cpp

@@ -1,16 +0,0 @@
-/*
- * Copyright (C) 2020-2022 Intel Corporation
- *
- * SPDX-License-Identifier: MIT
- *
- */
-
-#include "shared/source/os_interface/linux/drm_neo.h"
-
-namespace NEO {
-
-bool Drm::hasPageFaultSupport() const {
-    return false;
-}
-
-} // namespace NEO

shared/test/common/libult/linux/drm_mock.h

@@ -131,6 +131,10 @@ class DrmMock : public Drm {
     }
 
     bool hasPageFaultSupport() const override {
+        if (DebugManager.flags.EnableRecoverablePageFaults.get() != -1) {
+            return !!DebugManager.flags.EnableRecoverablePageFaults.get();
+        }
+
         return pageFaultSupported;
     }