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x86, mce: sysfs entries for new mce options 

Add sysfs interface for admins who want to tweak these options without
rebooting the system.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Hidetoshi Seto 2009-06-15 17:21:36 +09:00 committed by H. Peter Anvin
parent 1020bcbcc7
commit 9af43b54ab
1 changed files with 83 additions and 1 deletions
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84
arch/x86/kernel/cpu/mcheck/mce.c
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@ -1626,6 +1626,26 @@ static void mce_restart(void)
on_each_cpu(mce_cpu_restart, NULL, 1);
}
/* Toggle features for corrected errors */
static void mce_disable_ce(void *all)
{
if (!mce_available(&current_cpu_data))
return;
if (all)
del_timer_sync(&__get_cpu_var(mce_timer));
cmci_clear();
}
static void mce_enable_ce(void *all)
{
if (!mce_available(&current_cpu_data))
return;
cmci_reenable();
cmci_recheck();
if (all)
mce_init_timer();
}
static struct sysdev_class mce_sysclass = {
.suspend = mce_suspend,
.shutdown = mce_shutdown,
@ -1687,6 +1707,52 @@ static ssize_t set_trigger(struct sys_device *s, struct sysdev_attribute *attr,
return len;
}
static ssize_t set_ignore_ce(struct sys_device *s,
struct sysdev_attribute *attr,
const char *buf, size_t size)
{
u64 new;
if (strict_strtoull(buf, 0, &new) < 0)
return -EINVAL;
if (mce_ignore_ce ^ !!new) {
if (new) {
/* disable ce features */
on_each_cpu(mce_disable_ce, (void *)1, 1);
mce_ignore_ce = 1;
} else {
/* enable ce features */
mce_ignore_ce = 0;
on_each_cpu(mce_enable_ce, (void *)1, 1);
}
}
return size;
}
static ssize_t set_cmci_disabled(struct sys_device *s,
struct sysdev_attribute *attr,
const char *buf, size_t size)
{
u64 new;
if (strict_strtoull(buf, 0, &new) < 0)
return -EINVAL;
if (mce_cmci_disabled ^ !!new) {
if (new) {
/* disable cmci */
on_each_cpu(mce_disable_ce, NULL, 1);
mce_cmci_disabled = 1;
} else {
/* enable cmci */
mce_cmci_disabled = 0;
on_each_cpu(mce_enable_ce, NULL, 1);
}
}
return size;
}
static ssize_t store_int_with_restart(struct sys_device *s,
struct sysdev_attribute *attr,
const char *buf, size_t size)
@ -1699,6 +1765,7 @@ static ssize_t store_int_with_restart(struct sys_device *s,
static SYSDEV_ATTR(trigger, 0644, show_trigger, set_trigger);
static SYSDEV_INT_ATTR(tolerant, 0644, tolerant);
static SYSDEV_INT_ATTR(monarch_timeout, 0644, monarch_timeout);
static SYSDEV_INT_ATTR(dont_log_ce, 0644, mce_dont_log_ce);
static struct sysdev_ext_attribute attr_check_interval = {
_SYSDEV_ATTR(check_interval, 0644, sysdev_show_int,
@ -1706,9 +1773,24 @@ static struct sysdev_ext_attribute attr_check_interval = {
&check_interval
};
static struct sysdev_ext_attribute attr_ignore_ce = {
_SYSDEV_ATTR(ignore_ce, 0644, sysdev_show_int, set_ignore_ce),
&mce_ignore_ce
};
static struct sysdev_ext_attribute attr_cmci_disabled = {
_SYSDEV_ATTR(ignore_ce, 0644, sysdev_show_int, set_cmci_disabled),
&mce_cmci_disabled
};
static struct sysdev_attribute *mce_attrs[] = {
&attr_tolerant.attr, &attr_check_interval.attr, &attr_trigger,
&attr_tolerant.attr,
&attr_check_interval.attr,
&attr_trigger,
&attr_monarch_timeout.attr,
&attr_dont_log_ce.attr,
&attr_ignore_ce.attr,
&attr_cmci_disabled.attr,
NULL
};