Compute Express Link: Proposed Enhancements to UEFI and ACPI Specifications

Presented by

Mahesh Natu (Intel) and Thanu Rangarajan (Arm)

About this talk

Compute Express Link (CXL) is a new high-speed CPU-to-Device and CPU-to-Memory interconnect designed to accelerate next-generation data center performance. CXL is designed to be an industry open standard interface for high-speed communications, as accelerators and memory expanders are increasingly used to complement CPUs in support of emerging applications. The CXL 1.1 specification is already available, with work on future versions underway. CXL reinforces the need for standardization, with focus on technologies such as UEFI, ACPI and PCIe to provide the necessary interfaces between the firmware and the operating systems to support CXL new use cases of accelerators and memory expansion across different implementations. This presentation will first briefly introduce CXL 1.1 standard. It will then delve into the technical details of the proposed enhancements to the UEFI and ACPI specifications required for operating systems to manage CXL devices and ports in a system.

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