x86, random: Verify RDRAND functionality and allow it to be disabled

[firefly-linux-kernel-4.4.55.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index aa47be71df4c12ddeb15f7abead764279b20f113..397ee05132a36d1aec542ba9d9e2b67967df8f0a 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1764,6 +1764,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        noresidual      [PPC] Don't use residual data on PReP machines.
 
+       nordrand        [X86] Disable the direct use of the RDRAND
+                       instruction even if it is supported by the
+                       processor.  RDRAND is still available to user
+                       space applications.
+
        noresume        [SWSUSP] Disables resume and restores original swap
                        space.