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-rw-r--r--Documentation/kernel-parameters.txt7
1 files changed, 6 insertions, 1 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index cef2cb9cbf8a..f87e4bf2ab25 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -4075,9 +4075,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
off - Unconditionally disable mitigations. Is
enforced by spectre_v2=off
+ prctl - Indirect branch speculation is enabled,
+ but mitigation can be enabled via prctl
+ per thread. The mitigation control state
+ is inherited on fork.
+
auto - Kernel selects the mitigation depending on
the available CPU features and vulnerability.
- Default is off.
+ Default is prctl.
Not specifying this option is equivalent to
spectre_v2_user=auto.