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-rw-r--r--Documentation/x86_64/boot-options.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt
index 654ea4fccff88..153740f460a6c 100644
--- 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