Add intel_xpu to DETERMINISTIC_ATTENTION_BACKEND_CHOICES (#29143)

Co-authored-by: vshekhawat-hlab <vshekhawat@habana.ai>

test/registered/attention/test_deterministic.py

@@ -9,17 +9,29 @@ test into unit tests so that's easily reproducible in CI.
 
 import unittest
 
-from sglang.test.ci.ci_register import register_amd_ci, register_cuda_ci
+from sglang.srt.utils import is_xpu
+from sglang.test.ci.ci_register import (
+    register_amd_ci,
+    register_cuda_ci,
+    register_xpu_ci,
+)
 from sglang.test.test_deterministic_utils import (
     COMMON_SERVER_ARGS,
     TestDeterministicBase,
 )
-from sglang.test.test_utils import is_in_amd_ci
+from sglang.test.test_utils import (
+    DEFAULT_SMALL_MODEL_NAME_FOR_TEST_QWEN,
+    is_in_amd_ci,
+)
 
 register_cuda_ci(est_time=207, stage="base-b", runner_config="1-gpu-large")
 register_amd_ci(est_time=278, suite="stage-b-test-1-gpu-small-amd")
+register_xpu_ci(est_time=207, suite="stage-b-test-1-gpu-xpu")
+
+_is_xpu = is_xpu()
 
 
+@unittest.skipIf(_is_xpu, "CUDA runner only")
 @unittest.skipIf(is_in_amd_ci(), "Skip for AMD CI.")
 class TestFlashinferDeterministic(TestDeterministicBase):
     # Test with flashinfer attention backend
@@ -35,6 +47,7 @@ class TestFlashinferDeterministic(TestDeterministicBase):
         return args
 
 
+@unittest.skipIf(_is_xpu, "CUDA runner only")
 @unittest.skipIf(is_in_amd_ci(), "Skip for AMD CI.")
 class TestFa3Deterministic(TestDeterministicBase):
     # Test with fa3 attention backend
@@ -50,6 +63,7 @@ class TestFa3Deterministic(TestDeterministicBase):
         return args
 
 
+@unittest.skipIf(_is_xpu, "CUDA/AMD runner only")
 class TestTritonDeterministic(TestDeterministicBase):
     # Test with triton attention backend
     @classmethod
@@ -64,5 +78,29 @@ class TestTritonDeterministic(TestDeterministicBase):
         return args
 
 
+@unittest.skipUnless(_is_xpu, "XPU runner only")
+class TestIntelXPUDeterministic(TestDeterministicBase):
+    # Test with intel_xpu attention backend using smaller model to avoid OOM
+    @classmethod
+    def get_model(cls):
+        # Use smaller model for XPU to avoid OOM
+        return DEFAULT_SMALL_MODEL_NAME_FOR_TEST_QWEN
+
+    @classmethod
+    def get_server_args(cls):
+        args = COMMON_SERVER_ARGS
+        args.extend(
+            [
+                "--attention-backend",
+                "intel_xpu",
+                "--device",
+                "xpu",
+                "--mem-fraction-static",
+                "0.80",
+            ]
+        )
+        return args
+
+
 if __name__ == "__main__":
     unittest.main()