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authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>2013-07-01 21:08:47 +0530
committerTony Luck <tony.luck@intel.com>2013-07-08 11:53:01 -0700
commitc3d1fb567a634dcdff4c6f6095b2053260988336 (patch)
treebe2b0f39a3b489c4aa4b39d6c527be0c63146b92 /Documentation/x86
parent8bb495e3f02401ee6f76d1b1d77f3ac9f079e376 (diff)
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mce: acpi/apei: Honour Firmware First for MCA banks listed in APEI HEST CMC
The Corrected Machine Check structure (CMC) in HEST has a flag which can be set by the firmware to indicate to the OS that it prefers to process the corrected error events first. In this scenario, the OS is expected to not monitor for corrected errors (through CMCI/polling). Instead, the firmware notifies the OS on corrected error events through GHES. Linux already has support for GHES. This patch adds support for parsing CMC structure and to disable CMCI/polling if the firmware first flag is set. Further, the list of machine check bank structures at the end of CMC is used to determine which MCA banks function in FF mode, so that we continue to monitor error events on the other banks. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Borislav Petkov <bp@suse.de> Signed-off-by: Tony Luck <tony.luck@intel.com>
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