From patchwork Wed Aug 9 07:07:06 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?SsO8cmdlbiBHcm/Dnw==?= X-Patchwork-Id: 9889719 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6DB66602D7 for ; Wed, 9 Aug 2017 07:10:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6148026BE9 for ; Wed, 9 Aug 2017 07:10:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 562A4274D1; Wed, 9 Aug 2017 07:10:26 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B9E8826BE9 for ; Wed, 9 Aug 2017 07:10:25 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dfL6c-0002Fb-1O; Wed, 09 Aug 2017 07:08:38 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dfL6a-0002Ad-Cw for xen-devel@lists.xen.org; Wed, 09 Aug 2017 07:08:36 +0000 Received: from [85.158.137.68] by server-6.bemta-3.messagelabs.com id 0C/0E-02181-3F4BA895; Wed, 09 Aug 2017 07:08:35 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrMLMWRWlGSWpSXmKPExsVyuP0Ov+7nLV2 RBic+sVos+biYxYHR4+ju30wBjFGsmXlJ+RUJrBknljSwFPxWqviz8BBzA+Nk2S5GTg4JASOJ txP/MXUxcnEICSxklOj78okJJMEmoCqx4fopVhBbREBa4trny4wgRcwCj5kkZuxaDlYkLBAiM fH7I2YQmwWo4caeJWBxXgFTiUkbulggNshLdByYDGZzAsWnvNwOViMkYCJx6+w0tgmM3AsYGV YxahSnFpWlFukaG+glFWWmZ5TkJmbm6BoaGOvlphYXJ6an5iQmFesl5+duYgR6uJ6BgXEHY+c Jv0OMkhxMSqK8m7Q7I4X4kvJTKjMSizPii0pzUosPMcpwcChJ8N7c3BUpJFiUmp5akZaZAww1 mLQEB4+SCG81SJq3uCAxtzgzHSJ1ilGX49WE/9+YhFjy8vNSpcR5f4MUCYAUZZTmwY2Ahf0lR lkpYV5GBgYGIZ6C1KLczBJU+VeM4hyMSsK8E0Gm8GTmlcBtegV0BBPQERG+nSBHlCQipKQaGP nWLti4rTNNvrSbtV3y7ZVXJz8s3jTRoTPwpMirleU3vRrX/Nhh3nha/HaAx4xS7fBp/JftQ0Q 52Bw25nDun654f3lGwYSnzGLiTzoVLu+uMLEoFFFdIvA2oO9Gi4hjpuPFmh2ifSuuRDuml9k+ 11CY4e/YddV254uran+Vzc/4sR99kXY3SomlOCPRUIu5qDgRAOp5CxJ2AgAA X-Env-Sender: jgross@suse.com X-Msg-Ref: server-11.tower-31.messagelabs.com!1502262514!78327106!1 X-Originating-IP: [195.135.220.15] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 9.4.45; banners=-,-,- X-VirusChecked: Checked Received: (qmail 59443 invoked from network); 9 Aug 2017 07:08:35 -0000 Received: from mx2.suse.de (HELO mx1.suse.de) (195.135.220.15) by server-11.tower-31.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 9 Aug 2017 07:08:35 -0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id B65C1AF21; Wed, 9 Aug 2017 07:07:34 +0000 (UTC) From: Juergen Gross To: xen-devel@lists.xen.org Date: Wed, 9 Aug 2017 09:07:06 +0200 Message-Id: <20170809070706.13481-53-jgross@suse.com> X-Mailer: git-send-email 2.12.3 In-Reply-To: <20170809070706.13481-1-jgross@suse.com> References: <20170809070706.13481-1-jgross@suse.com> Cc: Juergen Gross , Stefano Stabellini , Wei Liu , George Dunlap , Andrew Cooper , Ian Jackson , Tim Deegan , Jan Beulich Subject: [Xen-devel] [PATCH 52/52] xen: make some console related parameters settable at runtime X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP Support modifying conswitch, console_timestamps, loglvl and guest_loglvl at runtime. Cc: Andrew Cooper Cc: George Dunlap Cc: Ian Jackson Cc: Jan Beulich Cc: Konrad Rzeszutek Wilk Cc: Stefano Stabellini Cc: Tim Deegan Cc: Wei Liu Signed-off-by: Juergen Gross Reviewed-by: Wei Liu --- docs/misc/xen-command-line.markdown | 8 ++++++++ xen/drivers/char/console.c | 14 +++++++++----- 2 files changed, 17 insertions(+), 5 deletions(-) diff --git a/docs/misc/xen-command-line.markdown b/docs/misc/xen-command-line.markdown index 4002eab08b..9797c8db2d 100644 --- a/docs/misc/xen-command-line.markdown +++ b/docs/misc/xen-command-line.markdown @@ -391,6 +391,8 @@ makes sense on its own. > Default: `none` +> Can be modified at runtime + Specify which timestamp format Xen should use for each console line. * `none`: No timestamps @@ -417,6 +419,8 @@ into the console ring buffer. > Default: `conswitch=a` +> Can be modified at runtime + Specify which character should be used to switch serial input between Xen and dom0. The required sequence is CTRL-<switch char> three times. @@ -898,6 +902,8 @@ maximum number of maptrack frames domain. > Default: `guest_loglvl=none/warning` +> Can be modified at runtime + Set the logging level for Xen guests. Any log message with equal more more importance will be printed. @@ -1164,6 +1170,8 @@ if left disabled by the BIOS. > Default: `loglvl=warning` +> Can be modified at runtime + Set the logging level for Xen. Any log message with equal more more importance will be printed. diff --git a/xen/drivers/char/console.c b/xen/drivers/char/console.c index daf0e1878d..283bd3ac6c 100644 --- a/xen/drivers/char/console.c +++ b/xen/drivers/char/console.c @@ -41,6 +41,7 @@ string_param("console", opt_console); /* boots. Any other value, or omitting the char, enables auto-switch */ static unsigned char __read_mostly opt_conswitch[3] = "a"; string_param("conswitch", opt_conswitch); +string_param_runtime("conswitch", opt_conswitch); /* sync_console: force synchronous console output (useful for debugging). */ static bool_t __initdata opt_sync_console; @@ -69,6 +70,7 @@ static enum con_timestamp_mode __read_mostly opt_con_timestamp_mode = TSM_NONE; static int parse_console_timestamps(char *s); custom_param("console_timestamps", parse_console_timestamps); +custom_param_runtime("console_timestamps", parse_console_timestamps); /* conring_size: allows a large console ring than default (16kB). */ static uint32_t __initdata opt_conring_size; @@ -136,6 +138,8 @@ static int parse_guest_loglvl(char *s); */ custom_param("loglvl", parse_loglvl); custom_param("guest_loglvl", parse_guest_loglvl); +custom_param_runtime("loglvl", parse_loglvl); +custom_param_runtime("guest_loglvl", parse_guest_loglvl); static atomic_t print_everything = ATOMIC_INIT(0); @@ -145,7 +149,7 @@ static atomic_t print_everything = ATOMIC_INIT(0); return (lvlnum); \ } -static int __init __parse_loglvl(char *s, char **ps) +static int __parse_loglvl(char *s, char **ps) { ___parse_loglvl(s, ps, "none", 0); ___parse_loglvl(s, ps, "error", 1); @@ -156,7 +160,7 @@ static int __init __parse_loglvl(char *s, char **ps) return 2; /* sane fallback */ } -static int __init _parse_loglvl(char *s, int *lower, int *upper) +static int _parse_loglvl(char *s, int *lower, int *upper) { *lower = *upper = __parse_loglvl(s, &s); if ( *s == '/' ) @@ -167,12 +171,12 @@ static int __init _parse_loglvl(char *s, int *lower, int *upper) return *s ? -EINVAL : 0; } -static int __init parse_loglvl(char *s) +static int parse_loglvl(char *s) { return _parse_loglvl(s, &xenlog_lower_thresh, &xenlog_upper_thresh); } -static int __init parse_guest_loglvl(char *s) +static int parse_guest_loglvl(char *s) { return _parse_loglvl(s, &xenlog_guest_lower_thresh, &xenlog_guest_upper_thresh); @@ -606,7 +610,7 @@ static int printk_prefix_check(char *p, char **pp) ((loglvl < upper_thresh) && printk_ratelimit())); } -static int __init parse_console_timestamps(char *s) +static int parse_console_timestamps(char *s) { switch ( parse_bool(s) ) {