ASID (Address Space ID) or as Intel calls it PCID (Process Context ID). The OS juggles these based on what processes are resident on CPU and the various active

ASID (Address Space ID) or as Intel calls it PCID (Process Context ID). The OS juggles these based on what processes are resident on CPU and the various active mappings then uses INVPCID[0] during a context switch. [0]: https://www.felixcloutier.com/x86/invpcid https://www.felixcloutier.com/x86/invpcid