Patent ID: 7934121

Claim:
A method of transparently replacing a processor with a replacement processor in a partitioned computing device containing a plurality of partition units, each of which includes a processor that is capable of responding to interrupts, the method comprising: determining that a processor is to be replaced; selecting a replacement processor; temporarily restricting the interrupts that interrupt the processor to be replaced; activating the replacement processor; setting a partition ID of the replacement processor to a partition ID of the processor to be replaced; transferring a state of the processor to be replaced to the replacement processor; and mapping the replacement processor to an identifier of the processor to be replaced using logical mode delivery, wherein logical mode delivery comprises: (a) configuring the computing device such that the computing device uses logical APIC IDs; (b) using the logical APIC IDs as remapping registers; and (c) inserting a logical APIC ID of the processor to be replaced into the replacement processor.