Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758027Ab3CDEGy (ORCPT ); Sun, 3 Mar 2013 23:06:54 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:32815 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756240Ab3CDDna (ORCPT ); Sun, 3 Mar 2013 22:43:30 -0500 Message-Id: <20130304033717.804996924@decadent.org.uk> User-Agent: quilt/0.60-1 Date: Mon, 04 Mar 2013 03:38:50 +0000 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: akpm@linux-foundation.org, Konrad Rzeszutek Wilk , "H. Peter Anvin" , "H. Peter Anvin" Subject: [ 103/153] doc, xen: Mention earlyprintk=xen in the documentation. In-Reply-To: <20130304033707.648729212@decadent.org.uk> X-SA-Exim-Connect-IP: 2001:470:1f08:1539:a11:96ff:fec6:70c4 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1655 Lines: 49 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Konrad Rzeszutek Wilk 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 Signed-off-by: Konrad Rzeszutek Wilk Link: http://lkml.kernel.org/r/1361825650-14031-2-git-send-email-konrad.wilk@oracle.com Signed-off-by: H. Peter Anvin Signed-off-by: Ben Hutchings --- Documentation/kernel-parameters.txt | 3 +++ 1 file changed, 3 insertions(+) --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -703,6 +703,7 @@ bytes respectively. Such letter suffixes earlyprintk= [X86,SH,BLACKFIN] earlyprintk=vga + earlyprintk=xen earlyprintk=serial[,ttySn[,baudrate]] earlyprintk=ttySn[,baudrate] earlyprintk=dbgp[debugController#] @@ -720,6 +721,8 @@ 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/