diff --git a/man7/kernel_lockdown.7 b/man7/kernel_lockdown.7
index 04de4d1fe..5aedd96e9 100644
--- a/man7/kernel_lockdown.7
+++ b/man7/kernel_lockdown.7
@@ -104,4 +104,17 @@ whether or not they are specified on the command line,
 for both the built-in and custom policies in secure boot lockdown mode.
 .SH VERSIONS
 The Kernel Lockdown feature was added in Linux 5.4.
+.SH NOTES
+The Kernel Lockdown feature is enabled by CONFIG_SECURITY_LOCKDOWN_LSM.
+The
+.I lsm=lsm1,...,lsmN
+command line parameter controls the sequence of the initialization of
+Linux Security Modules.
+It must contain the string
+.I lockdown
+to enable the Kernel Lockdown feature.
+If the command line parameter is not specified,
+the initialization falls back to the value of the deprecated
+.I security=
+command line parameter and further to the value of CONFIG_LSM.
 .\" commit 000d388ed3bbed745f366ce71b2bb7c2ee70f449