[ACPI] document processor.nocst parameter

Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 5dffcfefc3c715698eca24b519df8eab6d8a799d..6e9f1dc26884d6bf06f63406dd7b38dac4b89b92 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1160,6 +1160,10 @@ running once the system is up.
                        Limit processor to maximum C-state
                        max_cstate=9 overrides any DMI blacklist limit.
 
+       processor.nocst [HW,ACPI]
+                       Ignore the _CST method to determine C-states,
+                       instead using the legacy FADT method
+
        prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk
                        before loading.
                        See Documentation/ramdisk.txt.