Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Reliability, Availability, Serviceability, and Manageability
54
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
Datasheet Volume Two: Functional Description, February 2014
Several of the RASM features require BIOS/SMM and SW
1
 support. Therefore, system 
architects implementing RASM features are advised to comprehend software 
implications and any feature limitation due to a given software architecture.
7.2
Error Detection and Correction
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family incorporates error 
detection and correction logic within each module to meet the desired reliability 
requirements. 
7.3
Error Reporting via Machine Check Architecture
MCA provides a mechanism to report errors occurring within the processor. MCA applies 
to all the core and uncore modules of the Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 
v2 Product Family processor including the IIO module. There are three MCA modes of 
operation supported by Intel Xeon processor E7 v2 product family:
1. The legacy IA-32 MCA mode
2. The Corrupt Data Containment mode (aka Data Poisoning mode)
3. Viral mode
The legacy IA-32 MCA mode is already supported by several generations of Intel 
processors. It is architecturally defined and supported by most operating systems. The 
Corrupt Data Containment feature was first introduced on the Intel Xeon processor E7 
v2 product family. The Intel Xeon processor E7 v2 product family expands the Corrupt 
Data Containment feature coverage further and offer handling of such errors within the 
core (SRAR type of UCR errors) including features such as MCA Recovery - Execution 
Path and MCA Recovery - Non-execution Path.
The Intel Xeon processor E7 v2 product family also supports viral mode (or viral alert). 
Viral mode takes additional steps in hardware to improve error containment over data 
poisoning mode. Poisoning enables containment for data errors, while viral does the 
same for address, control, or miscellaneous fatal errors. The goal is to contain the error 
and prevent it from being committed to permanent storage or network. 
MCA Error reporting includes two key functions:
1. Error Logging, and
2. Error Signaling
7.3.1
Viral Alert
7.3.1.1
Feature Description
Viral alert is a method of providing enhanced error containment in case of fatal errors. 
Viral is propagated to all sockets and I/O entities for containment. Once an agent 
becomes viral, all future packets from that agent are considered compromised. 
It is important to note that errors that result in a viral condition are not recoverable or 
continuable. A system reset is required. Viral condition is cleared on reset. However, 
error logs in the machine check banks are preserved across warm reset.
1. Here ‘SW’ implies architecturally defined OS specific procedures. For further details, refer to 
Intel
® 
64 and IA-32 Architectures Software Developers’s Manual, Volume 3A: System 
Programming Guide, Part 1
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