ADLINK aTCA-9300 - Manual (Page 55)

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Active Processor Core
Number of cores to enable in each processor package.
Set this value to All / 1 / 2 / 3.
Limit CPUID Maximum
When the computer is boots, the operating system executes its CPUID instruction to
identify the processor and its capabilities. Before it can do so, it must first query the
processor to find out the highest input value the CPUID recognizes. This determines
the kind of basic information CPUID can provide the operating system. This option
allows you to circumvent problems with older operating systems.
When Enabled, the processor will limit the maximum CPUID input value to 03h when
queried, even if the processor supports a higher CPUID input value. When Disabled,
the processor will return the actual maximum CPUID input value of the processor
when queried.
Execute Disable Bit
XD can prevent certain classes of malicious buffer overflow attacks when combined
with a supporting OS.(Windows Server 2003 SP1, Windows XP SP2, SuSE Linux
9.2 Red Hat Enterprise 3 Update 3.)
Intel Virtualization Technology
When Enabled, a VMM can utilize the additional hardware capability provided by
Vanderpool Technology. Set this value to Enable/Disable.