Messages in this thread Patch in this message | | | From | Tony Luck <> | Subject | [PATCH v2 6/7] x86/mce: Add mce=print_all option | Date | Fri, 14 Feb 2020 14:27:19 -0800 |
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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> --- arch/x86/kernel/cpu/mce/core.c | 7 ++++++- arch/x86/kernel/cpu/mce/internal.h | 1 + 2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 066d3903ef97..22925fd5e189 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -590,7 +590,7 @@ 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; @@ -1950,6 +1950,7 @@ 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 @@ -1978,6 +1979,8 @@ 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")) @@ -2244,6 +2247,7 @@ 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), @@ -2268,6 +2272,7 @@ 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 b785c0d0b590..bf09b8aa8184 100644 --- a/arch/x86/kernel/cpu/mce/internal.h +++ b/arch/x86/kernel/cpu/mce/internal.h @@ -114,6 +114,7 @@ struct mca_config { bool dont_log_ce; bool cmci_disabled; bool ignore_ce; + bool print_all; __u64 lmce_disabled : 1, disabled : 1, -- 2.21.1
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