.\" .\" This file and its contents are supplied under the terms of the .\" Common Development and Distribution License ("CDDL"), version 1.0. .\" You may only use this file in accordance with the terms of version .\" 1.0 of the CDDL. .\" .\" A full copy of the text of the CDDL should have accompanied this .\" source. A copy of the CDDL is also available via the Internet at .\" http://www.illumos.org/license/CDDL. .\" .\" .\" Copyright 2023 Oxide Computer Company .\" .Dd February 26, 2023 .Dt AMDZEN 4D .Os .Sh NAME .Nm amdzen , .Nm amdzen_stub .Nd AMD Zen Nexus Driver .Sh DESCRIPTION The .Nm driver provides access to the Northbridge, Data Fabric, and System Management Network .Pq SMN for a number of AMD processor lines, including AMD Ryzen CPUs and APUs, ThreadRipper CPUs, and EPYC CPUs from the following families: .Bl -bullet .It AMD Zen Naples, Summit Ridge, Whitehaven .Pq Family 17h .It AMD Zen+ Colfax, Picasso, and Pinnacle Ridge .Pq Family 17h .It AMD Zen 2 Castle Peak, Matisse, Mendocino, Rome, Renoir, and Van Gogh .Pq Family 17h .It AMD Zen 3 Cezanne, Milan, and Vermeer .Pq Family 19h .It AMD Zen 3+ Rembrandt .Pq Family 19h .It AMD Zen 4 Genoa, Bergamo, Raphael, and Phoenix .Pq Family 19h .El .Pp This driver is a nexus driver and facilitates access to the northbridge, data fabric, and SMN between various other devices such as .Xr smntemp 4D . The various processor devices that make up the northbridge and data fabric have the .Sy amdzen_stub driver attached to them. The different devices are all amalgamated and a single uniform view is provided by the .Sy amdzen driver. .Pp The .Nm driver is a nexus driver that has the following children: .Bl -tag -width "smntemp(4D)" .It Xr smntemp 4D Provides access to on-die temperature sensors. .It Xr usmn 4D Provides read access to the SMN. This driver is intended for development purposes. .It Xr zen_udf 4D Provides read access to the data fabric. This driver is intended for development purposes. .El .Sh ARCHITECTURE The .Sy amdzen and .Sy amdzen_stub drivers are limited to .Sy x86 platforms with AMD Family 17h and 19h processors. .Sh SEE ALSO .Xr smntemp 4D , .Xr usmn 4D , .Xr zen_udf 4D