| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 17 Jun 2011 17:41:43 +0200
From: Borislav Petkov <bp@...64.org>
To: Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"x86@...nel.org" <x86@...nel.org>, Ingo Molnar <mingo@...e.hu>,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
"Luck, Tony" <tony.luck@...el.com>
Subject: Re: [PATCH 4/8] x86, mce: rename bootparam parser
On Fri, Jun 17, 2011 at 04:44:18AM -0400, Hidetoshi Seto wrote:
> Rename them with comprehensible prefix mcheck_setup.
The relocation is causing unneeded churn for no apparent reason.
> (at least it looks better than current misleading name)
> And relocate to put together setup codes.
>
> Before: After:
> mcheck_enable mcheck_setup
Nah, let's call it mcheck_parse_boot_param...
> mcheck_disable mcheck_setup_old
and leave this like this. "nomce" is the same as "mce=off" and frankly,
I'd like to remove this redundancy, thus no need to do the code
relocation. In addition, I don't think there are lots of systems running
with "nomce" so I really think we should drop it.
So Ingo, hpa, what is the proper way to remove early setup params? Maybe
through Documentation/feature-removal-schedule.txt?
>
> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
> ---
> arch/x86/kernel/cpu/mcheck/mce.c | 91 +++++++++++++++++++-------------------
> 1 files changed, 45 insertions(+), 46 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
> index c3dad64..ad0e9fb 100644
> --- a/arch/x86/kernel/cpu/mcheck/mce.c
> +++ b/arch/x86/kernel/cpu/mcheck/mce.c
> @@ -1662,50 +1662,6 @@ static struct miscdevice mce_chrdev_device = {
> &mce_chrdev_ops,
> };
>
> -/*
> - * mce=off Disables machine check
> - * mce=no_cmci Disables CMCI
> - * mce=dont_log_ce Clears corrected events silently, no log created for CEs.
> - * mce=ignore_ce Disables polling and CMCI, corrected events are not cleared.
> - * mce=TOLERANCELEVEL[,monarchtimeout] (number, see above)
> - * monarchtimeout is how long to wait for other CPUs on machine
> - * check, or 0 to not wait
> - * mce=bootlog Log MCEs from before booting. Disabled by default on AMD.
Please remove "Disabled by default on AMD." while you're at it, since
this is not true anymore.
> - * mce=nobootlog Don't log MCEs from before booting.
> - */
> -static int __init mcheck_enable(char *str)
> -{
> - if (*str == 0) {
> - enable_p5_mce();
> - return 1;
> - }
> - if (*str == '=')
> - str++;
> - if (!strcmp(str, "off"))
> - mce_disabled = 1;
> - else if (!strcmp(str, "no_cmci"))
> - mce_cmci_disabled = 1;
> - else if (!strcmp(str, "dont_log_ce"))
> - mce_dont_log_ce = 1;
> - else if (!strcmp(str, "ignore_ce"))
> - mce_ignore_ce = 1;
> - else if (!strcmp(str, "bootlog") || !strcmp(str, "nobootlog"))
> - mce_bootlog = (str[0] == 'b');
> - else if (isdigit(str[0])) {
> - get_option(&str, &tolerant);
> - if (*str == ',') {
> - ++str;
> - get_option(&str, &monarch_timeout);
> - }
> - } else {
> - printk(KERN_INFO "mce argument %s ignored. Please use /sys\n",
> - str);
> - return 0;
> - }
> - return 1;
> -}
> -__setup("mce", mcheck_enable);
> -
> int __init mcheck_init(void)
> {
> mcheck_intel_therm_init();
> @@ -2120,14 +2076,57 @@ static __init int mcheck_init_device(void)
> device_initcall(mcheck_init_device);
>
> /*
> + * mce=off Disables machine check
> + * mce=no_cmci Disables CMCI
> + * mce=dont_log_ce Clears corrected events silently, no log created for CEs.
> + * mce=ignore_ce Disables polling and CMCI, corrected events are not cleared.
> + * mce=TOLERANCELEVEL[,monarchtimeout] (number, see above)
> + * monarchtimeout is how long to wait for other CPUs on machine
> + * check, or 0 to not wait
> + * mce=bootlog Log MCEs from before booting. Disabled by default on AMD.
> + * mce=nobootlog Don't log MCEs from before booting.
> + */
> +static int __init mcheck_setup(char *str)
> +{
> + if (*str == 0) {
> + enable_p5_mce();
> + return 1;
> + }
> + if (*str == '=')
> + str++;
> + if (!strcmp(str, "off"))
> + mce_disabled = 1;
> + else if (!strcmp(str, "no_cmci"))
> + mce_cmci_disabled = 1;
> + else if (!strcmp(str, "dont_log_ce"))
> + mce_dont_log_ce = 1;
> + else if (!strcmp(str, "ignore_ce"))
> + mce_ignore_ce = 1;
> + else if (!strcmp(str, "bootlog") || !strcmp(str, "nobootlog"))
> + mce_bootlog = (str[0] == 'b');
> + else if (isdigit(str[0])) {
> + get_option(&str, &tolerant);
> + if (*str == ',') {
> + ++str;
> + get_option(&str, &monarch_timeout);
> + }
> + } else {
> + pr_info("mce argument %s ignored. Please use /sys\n", str);
> + return 0;
> + }
> + return 1;
> +}
> +__setup("mce", mcheck_setup);
> +
> +/*
> * Old style boot options parsing. Only for compatibility.
> */
> -static int __init mcheck_disable(char *str)
> +static int __init mcheck_setup_old(char *str)
> {
> mce_disabled = 1;
> return 1;
> }
> -__setup("nomce", mcheck_disable);
> +__setup("nomce", mcheck_setup_old);
>
> #ifdef CONFIG_DEBUG_FS
> struct dentry *mce_get_debugfs_dir(void)
> --
> 1.7.1
>
>
>
--
Regards/Gruss,
Boris.
Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach
GM: Alberto Bozzo
Reg: Dornach, Landkreis Muenchen
HRB Nr. 43632 WEEE Registernr: 129 19551
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists