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| author | Tony Luck <tony.luck@intel.com> | 2020-02-14 14:27:19 -0800 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-04-14 16:00:30 +0200 |
| commit | 43505646941bee217b91d064756975aa1ab6ee3b (patch) | |
| tree | 8cf5f1dc00a35ea103f340be6c1f554c07547ac2 | |
| parent | 925946cfa715a5a71639528f82b98e58f14dd4cb (diff) | |
| download | linux-43505646941bee217b91d064756975aa1ab6ee3b.tar.gz linux-43505646941bee217b91d064756975aa1ab6ee3b.tar.bz2 linux-43505646941bee217b91d064756975aa1ab6ee3b.zip | |
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: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20200214222720.13168-7-tony.luck@intel.com
| -rw-r--r-- | arch/x86/kernel/cpu/mce/core.c | 7 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mce/internal.h | 1 |
2 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index fc879b6669d5..4efe6c128887 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -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 diff --git a/arch/x86/kernel/cpu/mce/internal.h b/arch/x86/kernel/cpu/mce/internal.h index 74a01829c4f4..55f5c7b755f2 100644 --- a/arch/x86/kernel/cpu/mce/internal.h +++ b/arch/x86/kernel/cpu/mce/internal.h @@ -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, |