Fix(cpu): Add riscv64 to chunked_prefill exclusion list

Signed-off-by: lyd1992 <liuyudong@iscas.ac.cn>
Signed-off-by: ihb2032 <1355790728@qq.com>

Author: ihb2032

vllm/engine/arg_utils.py

@@ -1162,9 +1162,10 @@ def create_engine_config(
         self._set_default_args(usage_context, model_config)
         # Disable chunked prefill for POWER (ppc64le)/ARM/s390x CPUs in V1
         if current_platform.is_cpu() and current_platform.get_cpu_architecture(
-        ) in (CpuArchEnum.POWERPC, CpuArchEnum.S390X, CpuArchEnum.ARM):
-            logger.info("Chunked prefill is not supported for ARM and POWER "
-                        "and S390X CPUs; "
+        ) in (CpuArchEnum.POWERPC, CpuArchEnum.S390X, CpuArchEnum.ARM,
+        CpuArchEnum.RISCV):
+            logger.info("Chunked prefill is not supported for ARM and POWER, "
+                        "S390X and RISC-V CPUs; "
                         "disabling it for V1 backend.")
             self.enable_chunked_prefill = False
         assert self.enable_chunked_prefill is not None