[PATCH v4 0/2]RAS: add the support for handling UCNA/DEFERRED error

[Chen Yucong <slaoub@gmail.com>]

Hi all,

At the suggestion of Boris, the first patch extends the mce_severity
mechanism for handling UCNA/DEFERRED error.
  Link: https://lkml.org/lkml/2014/10/23/190

v2:
The first patch have also eliminated a big hack to make mce_severity() 
work when called from non-exception context on the advice of Tony and 
Boris.
  Link: https://lkml.org/lkml/2014/10/27/1017

And on the basis of the first patch, the second patch adds the support
for identifying and handling UCNA/DEFERRED error in machine_check_poll.

V3:
According to Boris, the second patch have also split `memory_error' 
from mem_deferred_error so that the memory_error() function can be used
in other code paths separately. 
  Link: https://lkml.org/lkml/2014/11/6/452

Boris also reported the warning about "MCI_STATUS_POISON" and  "MCI_STATUS_POISON"
redefined.

V4:
Like MCIP/RIPV/EIPV bits, MCI_STATUS_EN is specific to "machine check exception".
As Tony suggested, the severity table entry for the "EN" check should have been
skipped when calling from the CMCI/Poll handler.
  Link: https://lkml.org/lkml/2014/11/11/765
  AMD APM Volume 2: 9.3.2 Error-Reporting Register Banks - MCi_STATUS

memory_error() is incomplete for AMD platform. Boris will try to have a
fix.
  Link: https://lkml.org/lkml/2014/11/10/720

thx!
cyc 

[PATCH v4 1/2] x86, mce, severity: extend the the mce_severity
[PATCH v4 2/2] x86, mce: support memory error recovery for both UCNA