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>
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@ -1626,6 +1626,26 @@ static void mce_restart(void)
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on_each_cpu(mce_cpu_restart, NULL, 1);
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}
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/* Toggle features for corrected errors */
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static void mce_disable_ce(void *all)
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{
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if (!mce_available(¤t_cpu_data))
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return;
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if (all)
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del_timer_sync(&__get_cpu_var(mce_timer));
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cmci_clear();
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}
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static void mce_enable_ce(void *all)
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{
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if (!mce_available(¤t_cpu_data))
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return;
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cmci_reenable();
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cmci_recheck();
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if (all)
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mce_init_timer();
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}
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static struct sysdev_class mce_sysclass = {
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.suspend = mce_suspend,
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.shutdown = mce_shutdown,
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@ -1687,6 +1707,52 @@ static ssize_t set_trigger(struct sys_device *s, struct sysdev_attribute *attr,
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return len;
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}
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static ssize_t set_ignore_ce(struct sys_device *s,
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struct sysdev_attribute *attr,
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const char *buf, size_t size)
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{
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u64 new;
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if (strict_strtoull(buf, 0, &new) < 0)
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return -EINVAL;
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if (mce_ignore_ce ^ !!new) {
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if (new) {
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/* disable ce features */
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on_each_cpu(mce_disable_ce, (void *)1, 1);
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mce_ignore_ce = 1;
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} else {
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/* enable ce features */
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mce_ignore_ce = 0;
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on_each_cpu(mce_enable_ce, (void *)1, 1);
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}
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}
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return size;
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}
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static ssize_t set_cmci_disabled(struct sys_device *s,
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struct sysdev_attribute *attr,
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const char *buf, size_t size)
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{
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u64 new;
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if (strict_strtoull(buf, 0, &new) < 0)
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return -EINVAL;
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if (mce_cmci_disabled ^ !!new) {
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if (new) {
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/* disable cmci */
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on_each_cpu(mce_disable_ce, NULL, 1);
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mce_cmci_disabled = 1;
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} else {
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/* enable cmci */
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mce_cmci_disabled = 0;
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on_each_cpu(mce_enable_ce, NULL, 1);
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}
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}
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return size;
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}
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static ssize_t store_int_with_restart(struct sys_device *s,
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struct sysdev_attribute *attr,
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const char *buf, size_t size)
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@ -1699,6 +1765,7 @@ static ssize_t store_int_with_restart(struct sys_device *s,
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static SYSDEV_ATTR(trigger, 0644, show_trigger, set_trigger);
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static SYSDEV_INT_ATTR(tolerant, 0644, tolerant);
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static SYSDEV_INT_ATTR(monarch_timeout, 0644, monarch_timeout);
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static SYSDEV_INT_ATTR(dont_log_ce, 0644, mce_dont_log_ce);
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static struct sysdev_ext_attribute attr_check_interval = {
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_SYSDEV_ATTR(check_interval, 0644, sysdev_show_int,
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@ -1706,9 +1773,24 @@ static struct sysdev_ext_attribute attr_check_interval = {
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&check_interval
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};
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static struct sysdev_ext_attribute attr_ignore_ce = {
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_SYSDEV_ATTR(ignore_ce, 0644, sysdev_show_int, set_ignore_ce),
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&mce_ignore_ce
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};
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static struct sysdev_ext_attribute attr_cmci_disabled = {
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_SYSDEV_ATTR(ignore_ce, 0644, sysdev_show_int, set_cmci_disabled),
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&mce_cmci_disabled
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};
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static struct sysdev_attribute *mce_attrs[] = {
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&attr_tolerant.attr, &attr_check_interval.attr, &attr_trigger,
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&attr_tolerant.attr,
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&attr_check_interval.attr,
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&attr_trigger,
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&attr_monarch_timeout.attr,
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&attr_dont_log_ce.attr,
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&attr_ignore_ce.attr,
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&attr_cmci_disabled.attr,
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NULL
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};
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