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This talk examines support for Compute Express Link in Linux and QEMU, including device enumeration, memory regions, and decoder programming. It also reviews the pre-silicon state of the art and PCIe eXpander Bridge options.
Syllabus
Introduction
CXL Features
Usage Models
Form Factors
SW Enumerable Components
Linux Drivers
Enumeration Timeline
Volatile vs. Persistent
Regions
Region Validation
Decoder Programming
Linux Interfaces
Review Goals
Pre-silicon State of the Art
CXL Arch Review
Options
PCI eXpander Bridge (PXB)
November 10th 2020
What to do
Taught by
Linux Plumbers Conference