diff --git a/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c b/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c
index 6b1e7e6490..9f30df2973 100644
--- a/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c
+++ b/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c
@@ -2,6 +2,9 @@
   X86 specific implementation of QemuLoadImageLib library class interface
   with support for loading mixed mode images and non-EFI stub images
 
+  Note that this implementation reads the cmdline (and possibly kernel, setup
+  data, and initrd in the legacy boot mode) from fw_cfg directly.
+
   Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
   Copyright (c) 2020, ARM Ltd. All rights reserved.<BR>
 
diff --git a/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.inf b/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.inf
index e1615badd2..c7ec041cb7 100644
--- a/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.inf
+++ b/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.inf
@@ -2,6 +2,9 @@
 #  X86 specific implementation of QemuLoadImageLib library class interface
 #  with support for loading mixed mode images and non-EFI stub images
 #
+#  Note that this implementation reads the cmdline (and possibly kernel, setup
+#  data, and initrd in the legacy boot mode) from fw_cfg directly.
+#
 #  Copyright (c) 2020, ARM Ltd. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent