Merge branch 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (80 commits)
  x86, mce: Add boot options for corrected errors
  x86, mce: Fix mce printing
  x86, mce: fix for mce counters
  x86, mce: support action-optional machine checks
  x86, mce: define MCE_VECTOR
  x86, mce: rename mce_notify_user to mce_notify_irq
  x86: fix panic with interrupts off (needed for MCE)
  x86, mce: export MCE severities coverage via debugfs
  x86, mce: implement new status bits
  x86, mce: print header/footer only once for multiple MCEs
  x86, mce: default to panic timeout for machine checks
  x86, mce: improve mce_get_rip
  x86, mce: make non Monarch panic message "Fatal machine check" too
  x86, mce: switch x86 machine check handler to Monarch election.
  x86, mce: implement panic synchronization
  x86, mce: implement bootstrapping for machine check wakeups
  x86, mce: check early in exception handler if panic is needed
  x86, mce: add table driven machine check grading
  x86, mce: remove TSC print heuristic
  x86, mce: log corrected errors when panicing
  ...

4 files changed, 69 insertions, 8 deletions

diff --git a/Documentation/Changes b/Documentation/Changes
index b95082be4d5e..d21b3b5aa543 100644
--- a/Documentation/Changes
+++ b/Documentation/Changes
@@ -48,6 +48,7 @@ o  procps                 3.2.0                   # ps --version
 o  oprofile               0.9                     # oprofiled --version
 o  udev                   081                     # udevinfo -V
 o  grub                   0.93                    # grub --version
+o  mcelog                 0.6
 
 Kernel compilation
 ==================
@@ -276,6 +277,16 @@ before running exportfs or mountd.  It is recommended that all NFS
 services be protected from the internet-at-large by a firewall where
 that is possible.
 
+mcelog
+------
+
+In Linux 2.6.31+ the i386 kernel needs to run the mcelog utility
+as a regular cronjob similar to the x86-64 kernel to process and log
+machine check events when CONFIG_X86_NEW_MCE is enabled. Machine check
+events are errors reported by the CPU. Processing them is strongly encouraged.
+All x86-64 kernels since 2.6.4 require the mcelog utility to
+process machine checks.
+
 Getting updated software
 ========================
 
@@ -365,6 +376,10 @@ FUSE
 ----
 o <http://sourceforge.net/projects/fuse>
 
+mcelog
+------
+o <ftp://ftp.kernel.org/pub/linux/utils/cpu/mce/mcelog/>
+
 Networking
 **********
 
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index de491a3e2313..ec9ef5d0d7b3 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -437,3 +437,13 @@ Why:	Superseded by tdfxfb. I2C/DDC support used to live in a separate
         driver but this caused driver conflicts.
 Who:    Jean Delvare <khali@linux-fr.org>
         Krzysztof Helt <krzysztof.h1@wp.pl>
+
+----------------------------
+
+What:   CONFIG_X86_OLD_MCE
+When:   2.6.32
+Why:    Remove the old legacy 32bit machine check code. This has been
+        superseded by the newer machine check code from the 64bit port,
+        but the old version has been kept around for easier testing. Note this
+        doesn't impact the old P5 and WinChip machine check handlers.
+Who:    Andi Kleen <andi@firstfloor.org>
diff --git a/Documentation/x86/x86_64/boot-options.txt b/Documentation/x86/x86_64/boot-options.txt
index 2db5893d6c97..29a6ff8bc7d3 100644
--- a/Documentation/x86/x86_64/boot-options.txt
+++ b/Documentation/x86/x86_64/boot-options.txt
@@ -5,21 +5,51 @@ only the AMD64 specific ones are listed here.
 
 Machine check
 
-   mce=off disable machine check
-   mce=bootlog Enable logging of machine checks left over from booting.
-               Disabled by default on AMD because some BIOS leave bogus ones.
-               If your BIOS doesn't do that it's a good idea to enable though
-               to make sure you log even machine check events that result
-               in a reboot. On Intel systems it is enabled by default.
+   Please see Documentation/x86/x86_64/machinecheck for sysfs runtime tunables.
+
+   mce=off
+                Disable machine check
+   mce=no_cmci
+                Disable CMCI(Corrected Machine Check Interrupt) that
+                Intel processor supports.  Usually this disablement is
+                not recommended, but it might be handy if your hardware
+                is misbehaving.
+                Note that you'll get more problems without CMCI than with
+                due to the shared banks, i.e. you might get duplicated
+                error logs.
+   mce=dont_log_ce
+                Don't make logs for corrected errors.  All events reported
+                as corrected are silently cleared by OS.
+                This option will be useful if you have no interest in any
+                of corrected errors.
+   mce=ignore_ce
+                Disable features for corrected errors, e.g. polling timer
+                and CMCI.  All events reported as corrected are not cleared
+                by OS and remained in its error banks.
+                Usually this disablement is not recommended, however if
+                there is an agent checking/clearing corrected errors
+                (e.g. BIOS or hardware monitoring applications), conflicting
+                with OS's error handling, and you cannot deactivate the agent,
+                then this option will be a help.
+   mce=bootlog
+                Enable logging of machine checks left over from booting.
+                Disabled by default on AMD because some BIOS leave bogus ones.
+                If your BIOS doesn't do that it's a good idea to enable though
+                to make sure you log even machine check events that result
+                in a reboot. On Intel systems it is enabled by default.
    mce=nobootlog
                 Disable boot machine check logging.
-   mce=tolerancelevel (number)
+   mce=tolerancelevel[,monarchtimeout] (number,number)
+                tolerance levels:
                 0: always panic on uncorrected errors, log corrected errors
                 1: panic or SIGBUS on uncorrected errors, log corrected errors
                 2: SIGBUS or log uncorrected errors, log corrected errors
                 3: never panic or SIGBUS, log all errors (for testing only)
                 Default is 1
                 Can be also set using sysfs which is preferable.
+                monarchtimeout:
+                Sets the time in us to wait for other CPUs on machine checks. 0
+                to disable.
 
    nomce (for compatibility with i386): same as mce=off
 
diff --git a/Documentation/x86/x86_64/machinecheck b/Documentation/x86/x86_64/machinecheck
index a05e58e7b159..b1fb30273286 100644
--- a/Documentation/x86/x86_64/machinecheck
+++ b/Documentation/x86/x86_64/machinecheck
@@ -41,7 +41,9 @@ check_interval
         the polling interval.  When the poller stops finding MCEs, it
         triggers an exponential backoff (poll less often) on the polling
         interval. The check_interval variable is both the initial and
-        maximum polling interval.
+        maximum polling interval. 0 means no polling for corrected machine
+        check errors (but some corrected errors might be still reported
+        in other ways)
 
 tolerant
         Tolerance level. When a machine check exception occurs for a non
@@ -67,6 +69,10 @@ trigger
         Program to run when a machine check event is detected.
         This is an alternative to running mcelog regularly from cron
         and allows to detect events faster.
+monarch_timeout
+        How long to wait for the other CPUs to machine check too on a
+        exception. 0 to disable waiting for other CPUs.
+        Unit: us
 
 TBD document entries for AMD threshold interrupt configuration