Specifies the number of Logical Processors that are available in the
preboot environment after platform reset, including BSP and APs. Possible
values:

zero (default) - PcdCpuBootLogicalProcessorNumber is ignored, and
PcdCpuApInitTimeOutInMicroSeconds limits the initial AP
detection by the BSP.

nonzero - PcdCpuApInitTimeOutInMicroSeconds is ignored. The initial
AP detection finishes only when the detected CPU count
(BSP plus APs) reaches the value of
PcdCpuBootLogicalProcessorNumber, regardless of how long
that takes.

Number of Logical Processors available after platform reset.

PCD Information

Name	Token Space	Token number	Data Type	Default Value
PcdCpuBootLogicalProcessorNumber	gUefiCpuPkgTokenSpaceGuid	0x00000008	UINT32	0