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-rw-r--r--Documentation/admin-guide/kernel-parameters.txt21
1 files changed, 15 insertions, 6 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 3b335c1f8441..f24ee1c99412 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1501,12 +1501,21 @@
in crypto/hash_info.h.
ima_policy= [IMA]
- The builtin measurement policy to load during IMA
- setup. Specyfing "tcb" as the value, measures all
- programs exec'd, files mmap'd for exec, and all files
- opened with the read mode bit set by either the
- effective uid (euid=0) or uid=0.
- Format: "tcb"
+ The builtin policies to load during IMA setup.
+ Format: "tcb | appraise_tcb | secure_boot"
+
+ The "tcb" policy measures all programs exec'd, files
+ mmap'd for exec, and all files opened with the read
+ mode bit set by either the effective uid (euid=0) or
+ uid=0.
+
+ The "appraise_tcb" policy appraises the integrity of
+ all files owned by root. (This is the equivalent
+ of ima_appraise_tcb.)
+
+ The "secure_boot" policy appraises the integrity
+ of files (eg. kexec kernel image, kernel modules,
+ firmware, policy, etc) based on file signatures.
ima_tcb [IMA] Deprecated. Use ima_policy= instead.
Load a policy which meets the needs of the Trusted