Optional extension for green context (#9231)

sgl-kernel/csrc/spatial_extension.cc

@@ -0,0 +1,29 @@
+/* Copyright 2025 SGLang Team. 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.
+==============================================================================*/
+
+#include <torch/all.h>
+#include <torch/library.h>
+
+#include "sgl_kernel_ops.h"
+
+TORCH_LIBRARY_FRAGMENT(sgl_kernel, m) {
+  /*
+   * From csrc/spatial
+   */
+  m.def("create_greenctx_stream_by_value(int smA, int smB, int device) -> int[]");
+  m.impl("create_greenctx_stream_by_value", &create_greenctx_stream_by_value);
+}
+
+REGISTER_EXTENSION(spatial_ops)