Aggregation of hardware events in multi-node systems

The aggregation of hardware events in multi-node systems is disclosed. An event occurring at a remote node is forwarded to a primary node, by firmware of the remote node writing to a first register of the primary node. The event is propagated from the first register of the primary node to a second register node. In automatic response, an interrupt is generated at the primary node. An interrupt handler of the primary node, in response to generation of the interrupt, then invokes code at the primary node to handle the event occurring at the remote node.