This is a note to let you know that I've just added the patch titled
doc, xen: Mention 'earlyprintk=xen' in the documentation.
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
doc-xen-mention-earlyprintk-xen-in-the-documentation.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2482a92e7d17187301d7313cfe5021b13393a0b4 Mon Sep 17 00:00:00 2001
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Date: Mon, 25 Feb 2013 15:54:08 -0500
Subject: doc, xen: Mention 'earlyprintk=xen' in the documentation.
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
commit 2482a92e7d17187301d7313cfe5021b13393a0b4 upstream.
The earlyprintk for Xen PV guests utilizes a simple hypercall
(console_io) to provide output to Xen emergency console.
Note that the Xen hypervisor should be booted with 'loglevel=all'
to output said information.
Reported-by: H. Peter Anvin <hpa@xxxxxxxxx>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1361825650-14031-2-git-send-email-konrad.wilk@xxxxxxxxxx
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
Documentation/kernel-parameters.txt | 3 +++
1 file changed, 3 insertions(+)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -742,6 +742,7 @@ bytes respectively. Such letter suffixes
earlyprintk= [X86,SH,BLACKFIN]
earlyprintk=vga
+ earlyprintk=xen
earlyprintk=serial[,ttySn[,baudrate]]
earlyprintk=ttySn[,baudrate]
earlyprintk=dbgp[debugController#]
@@ -759,6 +760,8 @@ bytes respectively. Such letter suffixes
The VGA output is eventually overwritten by the real
console.
+ The xen output can only be used by Xen PV guests.
+
ekgdboc= [X86,KGDB] Allow early kernel console debugging
ekgdboc=kbd
Patches currently in stable-queue which might be from konrad.wilk@xxxxxxxxxx are
queue-3.4/doc-kernel-parameters-document-console-hvc-n.patch
queue-3.4/doc-xen-mention-earlyprintk-xen-in-the-documentation.patch
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