chore: import upstream snapshot with attribution

paddle/phi/backends/all_context.h

@@ -0,0 +1,35 @@
+/* Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#pragma once
+
+// Note: Some scenarios need to include all types of Context declarations.
+// In order to avoid including the header files of each backend in turn,
+// add this header file
+// Note: Limit the entry of DeviceContext to backends to avoid multiple include
+// path replacement after implementing phi DeviceContext
+
+#include "paddle/phi/backends/cpu/cpu_context.h"
+#ifdef PADDLE_WITH_CUSTOM_DEVICE
+#include "paddle/phi/backends/custom/custom_context.h"
+#endif
+#if defined(PADDLE_WITH_CUDA) || defined(PADDLE_WITH_HIP)
+#include "paddle/phi/backends/gpu/gpu_context.h"
+#endif
+#include "paddle/phi/backends/onednn/onednn_context.h"
+#ifdef PADDLE_WITH_XPU
+#include "paddle/phi/backends/xpu/xpu_context.h"
+#endif
+
+namespace phi {}  // namespace phi