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Intel

Xeon

Processor E7-8800/4800/2800 Product Families 29

Specification Update September 2012

Intel

Xeon

Processor E7-8800/

4800/2800 Product Families BIOS

ACM Errata

AC1. BIOS ACM Exit INIT (LockConfig) Call May Fail on Certain IOH Bus

Configurations

Problem: With certain IOH bus configurations, the BIOS ACM Exit Init (LockConfig) call may be

unable to lock the IOHs and the call will fail.

Implication: When this erratum occurs, the TXT.HEAP.BASE and TXT.HEAP.SIZE registers will be

locked, and BIOS will be unable to setup TXT heap memory for MLE (Measured Launch

Environment) boot.

Workaround: On single IOH configurations, the IOH can use bus 0x00-0x7F to avoid this erratum. On

dual IOH configurations, IOH0 can use bus 00-0x7F and IOH1 can use bus 0x80-0xF7

to avoid this erratum.

Status: Fixed in BIOS ACM 1.1.

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Intel AT80615007245AA Scheda Tecnica Pagina 29