Sep 12 – 14, 2022
Europe/Dublin timezone

Compute Express Link

Not scheduled
LPC Microconference Track (CLOSED)


Adam Manzanares (Western Digital Research) Ben Widawsky Dan Williams (Intel Open Source Technology Center)


Compute Express Link is a cache coherent fabric that is gaining a lot of
momentum in the industry and subsuming many competing specifications. Several
hardware vendors have begun to ramp up on CXL 2.0 hardware and software must not
lag behind. The current software ecosystem looks promising. Enough components
are mature enough to begin provisioning test systems. While Intel has been on
the forefront of the software enabling for memory expander devices, many other
interested parties are beginning to ask questions about how to participate and
support their hardware.

The Compute Express Link microconference focuses around how to evolve the Linux
CXL kernel driver and userspace for full support of the CXL 2.0 spec (and
beyond). It allows us to open the discussion to incorporate and grow the CXL
community making sure that everyone's needs are met and expectations are set
around what use-cases are expected and will be supported. Finally, it will be a
good opportunity to articulate what the current set of developers have a good
handle on how to support and what needs more brain power.

Suggested topics:
- Ecosystem & Architectural review
- Future kernel work - regions
- QEMU support now and later
- Security: IDE and SPDM
- Avoiding vendor specificity
- Collaboration on Future Spec enhancements
- Type 2 accelerator support (bias flip management)
- Hot remove
- RAS (GPF, AER, Poison handling )
- 1.1 to 2.0 compatibility
- topics currently under embargo (p2p)
- Hot add policy daxctl

Interesting Links

MC leads:
- Ben
- Dan
- Adam

Primary author


Dan Williams (Intel Open Source Technology Center)

Presentation materials

There are no materials yet.