Commit 43505646 authored by Tony Luck's avatar Tony Luck Committed by Borislav Petkov
Browse files

x86/mce: Add mce=print_all option 



Sometimes, when logs are getting lost, it's nice to just
have everything dumped to the serial console.

Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Tested-by: default avatarTony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20200214222720.13168-7-tony.luck@intel.com
parent 925946cf

arch/x86/kernel/cpu/mce/core.c

+6 −1
Original line number Diff line number Diff line
@@ -591,7 +591,7 @@ static int mce_default_notifier(struct notifier_block *nb, unsigned long val, 
	if (!m)

		return NOTIFY_DONE;



	if (!m->kflags)

	if (mca_cfg.print_all || !m->kflags)

		__print_mce(m);



	return NOTIFY_DONE;
@@ -1962,6 +1962,7 @@ void mce_disable_bank(int bank) 
 * mce=no_cmci Disables CMCI

 * mce=no_lmce Disables LMCE

 * mce=dont_log_ce Clears corrected events silently, no log created for CEs.

 * mce=print_all Print all machine check logs to console

 * 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
@@ -1990,6 +1991,8 @@ static int __init mcheck_enable(char *str) 
		cfg->lmce_disabled = 1;

	else if (!strcmp(str, "dont_log_ce"))

		cfg->dont_log_ce = true;

	else if (!strcmp(str, "print_all"))

		cfg->print_all = true;

	else if (!strcmp(str, "ignore_ce"))

		cfg->ignore_ce = true;

	else if (!strcmp(str, "bootlog") || !strcmp(str, "nobootlog"))
@@ -2256,6 +2259,7 @@ static ssize_t store_int_with_restart(struct device *s, 
static DEVICE_INT_ATTR(tolerant, 0644, mca_cfg.tolerant);

static DEVICE_INT_ATTR(monarch_timeout, 0644, mca_cfg.monarch_timeout);

static DEVICE_BOOL_ATTR(dont_log_ce, 0644, mca_cfg.dont_log_ce);

static DEVICE_BOOL_ATTR(print_all, 0644, mca_cfg.print_all);



static struct dev_ext_attribute dev_attr_check_interval = {

	__ATTR(check_interval, 0644, device_show_int, store_int_with_restart),
@@ -2280,6 +2284,7 @@ static struct device_attribute *mce_device_attrs[] = { 
#endif

	&dev_attr_monarch_timeout.attr,

	&dev_attr_dont_log_ce.attr,

	&dev_attr_print_all.attr,

	&dev_attr_ignore_ce.attr,

	&dev_attr_cmci_disabled.attr,

	NULL

arch/x86/kernel/cpu/mce/internal.h

+1 −0
Original line number Diff line number Diff line
@@ -119,6 +119,7 @@ struct mca_config { 
	bool dont_log_ce;

	bool cmci_disabled;

	bool ignore_ce;

	bool print_all;



	__u64 lmce_disabled		: 1,

	      disabled			: 1,