New flag: disable_global_lock - Disables global lock usage in guest code.

src/xenia/cpu/cpu_flags.cc

@@ -28,6 +28,10 @@ DEFINE_bool(trace_function_references, false,
 DEFINE_bool(trace_function_data, false,
             "Generate tracing for function result data.");
 
+DEFINE_bool(
+    disable_global_lock, false,
+    "Disables global lock usage in guest code. Does not affect host code.");
+
 DEFINE_bool(validate_hir, false,
             "Perform validation checks on the HIR during compilation.");