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Diffstat (limited to 'usr/src/man/man4d/usmn.4d')
| -rw-r--r-- | usr/src/man/man4d/usmn.4d | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/usr/src/man/man4d/usmn.4d b/usr/src/man/man4d/usmn.4d new file mode 100644 index 0000000000..165b87cca6 --- /dev/null +++ b/usr/src/man/man4d/usmn.4d @@ -0,0 +1,42 @@ +.\" +.\" 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 2021 Oxide Computer Company +.\" +.Dd July 30, 2021 +.Dt USMN 4D +.Os +.Sh NAME +.Nm usmn +.Nd AMD SMN user access driver +.Sh SYNOPSIS +.Pa /devices/pseudo/amdzen@0/usmn@2:usmn.* +.Sh DESCRIPTION +The +.Nm +driver provides the ability to read and write data from the AMD System +Management Network +.Pq SMN +on AMD Family 17h +.Pq Zen, Zen+, and Zen 2 +and AMD Family 19h +.Pq Zen 3 +processors. +.Pp +This driver is intended strictly for facilitating platform development +and is not recommended for systems that aren't doing kernel and platform +development on AMD Zen platforms. +Arbitrary writes to the SMN can severely damage and destabilize the system. +If you do not need access to the SMN, then this driver should not be +present on the system. +.Sh SEE ALSO +.Xr amdzen 4D , +.Xr zen_udf 4D |