Target computer processor unit (cpu) determination during cache injection using input/output (i/o) hub/chipset resources

A system for target computer processor unit (CPU) determination during cache injection using input/output (I/O) hub/chipset resources, comprising:

• an I/O hub/chipset in communication with a processor complex;
• and
• logic executing on the hub/chipset, the logic performing:
• initializing a cache injection indirection table on the hub/chipset, the cache injection indirection table including fields for address or address ranges, CPU identifier, and cache type;
• and
• in response to receiving an input/output (I/O) transaction, the hub/chipset performs:
• reading the address in an address field of the I/O transaction;
• looking up the address in the cache injection indirection table;
• and
• injecting the address and data of the I/O transaction to a target cache associated with a CPU as identified in the CPU identifier field when, in response to the look up, the address is present in the address field of the cache injection indirection table.

A computer program product for target computer processor unit (CPU) determination during cache injection using input/output (I/O) hub/chipset resources, the computer program product comprising:

• a storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for implementing a method, the method comprising:
• creating a cache injection indirection table on the input/output (I/O) hub/chipset that comprises one of an input/output (I/O) hub and a system chipset, the cache injection indirection table including fields for address or address range, CPU identifier, and cache type;
• and
• in response to receiving an input/output (I/O) transaction, the I/O hub/chipset performs:
• reading the address in an address field of the I/O transaction;
• looking up the address in the cache injection indirection table;
• and
• injecting the address and data of the I/O transaction to a target cache associated with a CPU as identified in the CPU identifier field when, in response to the look up, the address is present in the address field of the cache injection indirection table.