Linux Gen-Z Sub-system

Explore the design and challenges of implementing a Gen-Z kernel subsystem for Linux in this comprehensive conference talk from the Linux Plumbers Conference. Delve into the intricacies of Gen-Z, a scalable fabric interconnect technology, and learn about its key features including registration and enumeration services, Gen-Z Memory Management Unit (ZMMU), Region Keys (R-Keys), Process Address Space Identifier (PASID), data movers, UUIDs, and interrupt handling. Examine the proposed block diagram for the Gen-Z subsystem and understand the importance of user space discovery and management in fabric management. Discover how the speakers leverage their experience with various Gen-Z hardware bridges to design an efficient Linux subsystem. Gain insights into the interfaces required for management services, including read/write access to component control space, notification of management events, and communication of component events using generic Netlink messages.