Emulating execution of an instruction for discovering virtual topology of a logical partitioned computer system

摘要

In a logically partitioned host computer system comprising host processors (host CPUs), a facility and instruction for discovering topology of one or more guest processors (guest CPUs) of a guest configuration comprises a guest processor of the guest configuration fetching and executing a STORE SYSTEM INFORMATION instruction that obtains topology information of the computer configuration. The topology information comprising nesting information of processors of the configuration and the degree of dedication a host processor provides to a corresponding guest processor. The information is preferably stored in a single table in memory.

主权项

1. In a logically partitioned host computer system comprising host processors (host CPUs), a method for discovering topology of one or more guest processors (guest CPUs) of a guest configuration, the method comprising:
executing a STORE SYSTEM INFORMATION instruction by a logical processor of a logical partition, wherein the STORE SYSTEM INFORMATION instruction defined for a computer architecture is executed by a central processing unit of an alternate computer architecture, the execution comprising: obtaining topology information of the guest configuration wherein the topology information comprises nesting information of logical processors of the logical partition, the nesting information comprising an indication of a maximum number of containers for each nesting level, wherein a container specifies groups of processors or groups of containers; and storing the topology information in a configuration topology table.