path: root/Documentation
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authorLinus Torvalds <torvalds@linux-foundation.org>2014-01-20 12:10:27 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-20 12:10:27 -0800
commitfab5669d556200c4dd119af705bff14085845d1e (patch)
tree366d05fc858fc599177d687f37b227a4832c2f48 /Documentation
parent74e8ee8262c3f93bbc41804037b43f07b95897bb (diff)
parentb769e014f3ae4af8a56c6327077b3c40410dedad (diff)
Merge branch 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 RAS changes from Ingo Molnar: - SCI reporting for other error types not only correctable ones - GHES cleanups - Add the functionality to override error reporting agents as some machines are sporting a new extended error logging capability which, if done properly in the BIOS, makes a corresponding EDAC module redundant - PCIe AER tracepoint severity levels fix - Error path correction for the mce device init - MCE timer fix - Add more flexibility to the error injection (EINJ) debugfs interface * 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, mce: Fix mce_start_timer semantics ACPI, APEI, GHES: Cleanup ghes memory error handling ACPI, APEI: Cleanup alignment-aware accesses ACPI, APEI, GHES: Do not report only correctable errors with SCI ACPI, APEI, EINJ: Changes to the ACPI/APEI/EINJ debugfs interface ACPI, eMCA: Combine eMCA/EDAC event reporting priority EDAC, sb_edac: Modify H/W event reporting policy EDAC: Add an edac_report parameter to EDAC PCI, AER: Fix severity usage in aer trace event x86, mce: Call put_device on device_register failure
Diffstat (limited to 'Documentation')
2 files changed, 26 insertions, 1 deletions
diff --git a/Documentation/acpi/apei/einj.txt b/Documentation/acpi/apei/einj.txt
index a58b63da1a36..f51861bcb07b 100644
--- a/Documentation/acpi/apei/einj.txt
+++ b/Documentation/acpi/apei/einj.txt
@@ -45,11 +45,22 @@ directory apei/einj. The following files are provided.
injection. Before this, please specify all necessary error
+- flags
+ Present for kernel version 3.13 and above. Used to specify which
+ of param{1..4} are valid and should be used by BIOS during injection.
+ Value is a bitmask as specified in ACPI5.0 spec for the
+ Bit 0 - Processor APIC field valid (see param3 below)
+ Bit 1 - Memory address and mask valid (param1 and param2)
+ Bit 2 - PCIe (seg,bus,dev,fn) valid (param4 below)
+ If set to zero, legacy behaviour is used where the type of injection
+ specifies just one bit set, and param1 is multiplexed.
- param1
This file is used to set the first error parameter value. Effect of
parameter depends on error_type specified. For example, if error
type is memory related type, the param1 should be a valid physical
- memory address.
+ memory address. [Unless "flag" is set - see above]
- param2
This file is used to set the second error parameter value. Effect of
@@ -58,6 +69,12 @@ directory apei/einj. The following files are provided.
address mask. Linux requires page or narrower granularity, say,
+- param3
+ Used when the 0x1 bit is set in "flag" to specify the APIC id
+- param4
+ Used when the 0x4 bit is set in "flag" to specify target PCIe device
- notrigger
The EINJ mechanism is a two step process. First inject the error, then
perform some actions to trigger it. Setting "notrigger" to 1 skips the
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 4eb5fff022b4..092cfd139065 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -890,6 +890,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
The xen output can only be used by Xen PV guests.
+ edac_report= [HW,EDAC] Control how to report EDAC event
+ Format: {"on" | "off" | "force"}
+ on: enable EDAC to report H/W event. May be overridden
+ by other higher priority error reporting module.
+ off: disable H/W event reporting through EDAC.
+ force: enforce the use of EDAC to report H/W event.
+ default: on.
ekgdboc= [X86,KGDB] Allow early kernel console debugging