kgdboc: Add ekgdboc for early use of the kernel debugger

The ekgdboc= differs from kgdboc= in that you can begin debuggin as
soon as the exceptions are setup and the kgdb I/O driver is available,
instead of waiting until the tty subsystem is available.

CC: kgdb-bugreport@lists.sourceforge.net
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index bdce359820bb..4c44d01c67f4 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -713,6 +713,12 @@ and is between 256 and 4096 characters. It is defined in the file
                         The VGA output is eventually overwritten by the real
                         console.
 
+        ekgdboc=        [X86,KGDB] Allow early kernel console debugging
+                        ekgdboc=kbd
+
+                        This is desgined to be used in conjunction with
+                        the boot argument: earlyprintk=vga
+
         eata=           [HW,SCSI]
 
         edd=            [EDD]