Remote command invocation using a register for storing a command and an attention bit indicating command has been issued

摘要

Technical solutions are described for a supervisory processor to pass an out-of-band communication to a target processor in a multiprocessor system. For example, a first processor in a multi-processor system includes a register configured to store a command from a second processor of the multi-processor system, and to store a response to the command from the second processor. The first processor determines that the second processor has issued the command for execution by the first processor based on a first portion of the register being set to a first state, which is a predetermined state. The first processor also, responsively, reads the command from the second processor by parsing a second portion of the register. The first processor includes executes the command and stores the response for the command in the register.