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Unlike proprietary solutions such as NVLink (NVIDIA) or > Infinity Fabric (AMD), UALink is a cross=E2=80=91vendor standard and was = recently > recognized at FMS 2025. >=20 > I would like to present a proposal on what UALink support could look like= in > the upstream Linux kernel. >=20 > Key areas for discussion: > - Core driver design: proposed start under drivers/misc/ual/ for discover= y, > =C2=A0 topology, and resource management. > - Memory semantics: same=E2=80=91OS and multi=E2=80=91OS rack scenarios, = leveraging dma_buf, > =C2=A0 HMM, and NUMA. > - Control path: AUX bus for vendor extensions, offloading real=E2=80=91ti= me sequences > =C2=A0 to device microcontrollers, generic UALink interface. > - Security: confidential compute support and a userspace daemon for topol= ogy > =C2=A0 and authentication. > - Upstreaming strategy: begin with a minimal core driver, then incrementa= lly > =C2=A0 extend toward MM integration, dma_buf support, security, and > =C2=A0 cross=E2=80=91subsystem work. >=20 > The goal is to decide how UALink should be represented as a first=E2=80= =91class > interconnect in Linux, complementing CXL while remaining vendor=E2=80=91n= eutral, > ABI=E2=80=91stable, and maintainable. Hi Konstantin, Please do also consider submitting this as a topic for the Device Memory Microconference (https://lpc.events/event/19/contributions/2009/). Many of folks with experience with CXL, NVLink, Infinity Fabric, RDMA, HMM, NUMA, dma_buf, Confidential Computing etc... will also be in the room for a focused topic like this.=