Chapter 4: UEFI BIOS
109
DCU IP Prefetcher
This feature allows the system to use the sequential load history, which is based on the
instruction pointer of previous loads, to determine whether the system will prefetch additional
lines. The options are Enable and Disable.
LLC Prefetch
If this feature is set to Enable, LLC (hardware cache) prefetching on all threads will be
supported. The options are Disable and Enable.
Extended APIC (Extended Advanced Programmable Interrupt Controller)
Based on the Intel Hyper-Threading technology, each logical processor (thread) is assigned
256 APIC IDs (APIDs) in 8-bit bandwidth. When this feature is set to Enable, the APIC ID will
be expanded from 8 bits to 16 bits to provide 512 APIDs to each thread for CPU performance
enhancement. The options are Disable and Enable.
Intel Virtualization Technology
Select Enable to enable the Intel Vanderpool Technology for Virtualization platform support,
which will allow multiple operating systems to run simultaneously on the same computer to
maximize system resources for performance enhancement. The options are Disable and
Enable.
Note:
Enable SMX
Select Enable to support Safer Mode Extensions (SMX) which provides a programming
interface for system software to establish a controlled environment to support the trusted
to run. The options are Disable and Enable.
PPIN Control
Select Unlock/Enable to use the Protected Processor Inventory Number (PPIN) in the system.
The PPIN is a unique number set for tracking a given Intel Xeon server processor. The options
are Lock/Disable and Unlock/Enable.
AES-NI
Select Enable to use the Intel Advanced Encryption Standard (AES) New Instructions (NI) to
ensure data security. The options are Disable and Enable.
Limit CPU PA to 46 Bits
Select Enable to limit CPU physical address to 46 bits to support the older Hyper-v CPU
platform. The options are Disable and Enable.
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