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  1. 27 8月, 2009 1 次提交
    • H
      x86, mce: CE in last bank prevents panic by unknown MCE · 680b6cfd
      由 Hidetoshi Seto 提交于 
      If MCE handler is called but none of mces_seen have machine
check event which might signal the MCE (i.e. event higher than
MCE_KEEP_SEVERITY), panic with "Machine check from unknown
source" will be taken since the MCE is assumed to be signaled
from external agent or so.

Usually mces_seen never point MCE_KEEP_SEVERITY event such as
CE. But it can happen because initial value of mces_seen is
accidentally modified by mce_no_way_out() - in case if
mce_no_way_out() run through all banks and the last bank has
the CE, mces_seen points the CE and the "panic by unknown" will
not be taken.

This patch fixes this undesired behavior, and clarifies the logic.
Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Dongming <jin.dongming@np.css.fujitsu.com>
LKML-Reference: <4A94E244.3020301@jp.fujitsu.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Reported-by: NJin Dongming <jin.dongming@np.css.fujitsu.com>
      680b6cfd
  3. 11 8月, 2009 4 次提交
  5. 30 7月, 2009 5 次提交
  7. 10 7月, 2009 5 次提交
  9. 21 6月, 2009 1 次提交
  11. 18 6月, 2009 3 次提交
  13. 17 6月, 2009 19 次提交
  15. 11 6月, 2009 2 次提交
    • H
      x86, mce: Add boot options for corrected errors · 62fdac59
      由 Hidetoshi Seto 提交于 
      This patch introduces three boot options (no_cmci, dont_log_ce
and ignore_ce) to control handling for corrected errors.

The "mce=no_cmci" boot option disables the CMCI feature.

Since CMCI is a new feature so having boot controls to disable
it will be a help if the hardware is misbehaving.

The "mce=dont_log_ce" boot option disables logging for corrected
errors. All reported corrected errors will be cleared silently.
This option will be useful if you never care about corrected
errors.

The "mce=ignore_ce" boot option disables features for corrected
errors, i.e. polling timer and cmci.  All corrected events are
not cleared and kept in bank MSRs.

Usually this disablement is not recommended, however it will be
a help if there are some conflict with the BIOS or hardware
monitoring applications etc., that clears corrected events in
banks instead of OS.

[ And trivial cleanup (space -> tab) for doc is included. ]
Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Reviewed-by: NAndi Kleen <ak@linux.intel.com>
LKML-Reference: <4A30ACDF.5030408@jp.fujitsu.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      62fdac59
    • H
      x86, mce: Fix mce printing · 77e26cca
      由 Hidetoshi Seto 提交于 
      This patch:

 - Adds print_mce_head() instead of first flag
 - Makes the header to be printed always
 - Stops double printing of corrected errors

[ This portion originates from Huang Ying's patch ]

Originally-From: Huang Ying <ying.huang@intel.com>
Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
LKML-Reference: <4A30AC83.5010708@jp.fujitsu.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      77e26cca