[Feat][LMCache] Support LMCache mp mode (#24089)

Signed-off-by: Shaoting-Feng <stfeng@uw.edu>

docs_new/docs/advanced_features/hicache_design.mdx

@@ -163,6 +163,8 @@ Specifically, **LMCache**, an efficient KV cache layer for enterprise-scale LLM
 
 - **`--enable-lmcache`**: Using LMCache as an alternative hierarchical cache solution.
 
+- **`--lmcache-config-file`**: Path to the LMCache YAML configuration file.
+
 - **`--hicache-storage-backend-extra-config HICACHE_STORAGE_BACKEND_EXTRA_CONFIG`**: the extra config can be either
   - a JSON string containing extra configuration for the storage backend, e.g., `--hicache-storage-backend-extra-config '{"prefetch_threshold":512, "prefetch_timeout_base": 0.5, "prefetch_timeout_per_ki_token": 0.25}' `, or
   - a TOML or JSON or YAML file specifying the extra configuration for the storage backend (to differentiate from the JSON string input, prepend a `@` in front of the file name), e.g., `--hicache-storage-backend-extra-config "@config.toml"` where `config.toml` is the config file containing the complex configurations. This can be useful when the configuration consists of many or complex key-value pairs (for instance, it is preferred to use a config file for NIXL backend as its configurations can be complex).

docs_new/docs/advanced_features/server_arguments.mdx

@@ -1756,6 +1756,12 @@ Please consult the documentation below and [server_args.py](https://github.com/s
       <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.02)"}}>`False`</td>
       <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.05)"}}>bool flag (set to enable)</td>
     </tr>
+    <tr>
+      <td style={{padding: "9px 12px", fontWeight: 500, backgroundColor: "rgba(255,255,255,0.02)"}}>`--lmcache-config-file`</td>
+      <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.05)"}}>Path to the LMCache YAML configuration file</td>
+      <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.02)"}}>`None`</td>
+      <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.05)"}}>Type: str</td>
+    </tr>
   </tbody>
 </table>
 

docs_new/docs/hardware-platforms/ascend-npus/ascend_npu_support_features.mdx

@@ -1751,6 +1751,12 @@ click [Server Arguments](../../advanced_features/server_arguments).
       <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.02)"}}>bool flag<br/> (set to enable)</td>
       <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.05)"}}>Special for GPU</td>
     </tr>
+    <tr>
+      <td style={{padding: "9px 12px", fontWeight: 500, backgroundColor: "rgba(255,255,255,0.02)"}}>`--lmcache-config-file`</td>
+      <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.05)"}}>`None`</td>
+      <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.02)"}}>Type: str</td>
+      <td style={{padding: "9px 12px", backgroundColor: "rgba(255,255,255,0.05)"}}>Special for GPU</td>
+    </tr>
   </tbody>
 </table>