diff --git a/src/gallium/frontends/nine/nine_state.c b/src/gallium/frontends/nine/nine_state.c
index d6a13622146..6f57b19e1aa 100644
--- a/src/gallium/frontends/nine/nine_state.c
+++ b/src/gallium/frontends/nine/nine_state.c
@@ -317,6 +317,17 @@ nine_context_get_pipe_release( struct NineDevice9 *device )
     nine_csmt_resume(device);
 }
 
+bool
+nine_context_is_worker( struct NineDevice9 *device )
+{
+    struct csmt_context *ctx = device->csmt_ctx;
+
+    if (!device->csmt_active)
+        return false;
+
+    return u_thread_is_self(ctx->worker);
+}
+
 /* Nine state functions */
 
 /* Check if some states need to be set dirty */
diff --git a/src/gallium/frontends/nine/nine_state.h b/src/gallium/frontends/nine/nine_state.h
index d0cf121867b..ab732c9ced9 100644
--- a/src/gallium/frontends/nine/nine_state.h
+++ b/src/gallium/frontends/nine/nine_state.h
@@ -672,4 +672,7 @@ nine_context_get_pipe_acquire( struct NineDevice9 *device );
 void
 nine_context_get_pipe_release( struct NineDevice9 *device );
 
+bool
+nine_context_is_worker( struct NineDevice9 *device );
+
 #endif /* _NINE_STATE_H_ */