Virtual Boot Processor
The virtual processor that is created with the index of zero is the virtual boot processor for the partition that the virtual processor is related to. This virtual processor will be the only virtual processor with the BSP flag set in the IA32_APIC_BASE_MSR register. Virtual processors that are created with nonzero indices are virtual application processors. Both the virtual boot processor and virtual application processors can be created or deleted at any time.
Build date: 11/16/2013