[PATCH] x86_64: Calibrate APIC timer using PM timer

[powerpc.git] / Documentation / x86_64 / boot-options.txt

diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt
index 654ea4f..153740f 100644 (file)
--- a/Documentation/x86_64/boot-options.txt
+++ b/Documentation/x86_64/boot-options.txt
@@ -47,6 +47,11 @@ APICs
    noapicmaintimer  Don't do time keeping using the APIC timer.
                 Useful when this option was auto selected, but doesn't work.
 
+   apicpmtimer
+                Do APIC timer calibration using the pmtimer. Implies
+                apicmaintimer. Useful when your PIT timer is totally
+                broken.
+
 Early Console
 
    syntax: earlyprintk=vga