diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 5339721f4..c79d58954 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -8205,6 +8205,30 @@ system and gives an overview of their function and contents.
       filesystem image extension found in :term:`DEPLOY_DIR_IMAGE`. For example:
       ``ext4.zst``.
 
+   :term:`QB_FSINFO`
+
+      The :term:`QB_FSINFO` variable provides additional filesystem metadata to
+      ``runqemu`` as a space-separated list of ``fstype:flag`` entries. For
+      example::
+
+         QB_FSINFO = "wic:no-kernel-in-fs tar:rootfs-dbg"
+
+      The currently supported ``fstype`` and ``flag`` entries are:
+
+      -  ``wic``:
+
+         -  ``no-kernel-in-fs``: Specifies that the kernel is not included in
+            the WIC image. In this case, ``runqemu`` loads the kernel separately.
+
+         -  ``kernel-in-fs``: Specifies that the kernel is included in the
+            WIC image. In this case, ``runqemu`` does not load a separate kernel.
+
+      -  ``tar``:
+
+         -  ``rootfs-dbg``: Makes ``runqemu`` use the debug root filesystem
+            image when extracting a tarball for NFS by appending ``-dbg`` to
+            :term:`IMAGE_LINK_NAME`.
+
    :term:`QB_DEFAULT_KERNEL`
 
       When using ``runqemu``, the :term:`QB_DEFAULT_KERNEL` variable controls