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-.\"
-.\" 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 2019 Joyent, Inc.
-.\"
-.Dd June 25, 2019
-.Dt IMC 7D
-.Os
-.Sh NAME
-.Nm imc
-.Nd Intel memory controller driver
-.Sh SYNOPSIS
-.Pa /dev/mc/mc*
-.Sh DESCRIPTION
-The
-.Nm
-driver interfaces with the memory controller found on certain
-generations of Intel CPUs and provides a means for decoding physical
-addresses to the corresponding memory device.
-The
-.Nm
-driver plugs into the operating systems fault management framework
-providing additional details to the system about the memory topology and
-the ability to decode physical addresses into the corresponding portion
-of the memory hierarchy.
-.Pp
-The
-.Nm
-driver is supported on the following Intel processors:
-.Bl -bullet -offset indent -width Sy
-.It
-Sandy Bridge E5 and E7 Xeon Processors
-.It
-Ivy Bridge E5 and E7 Xeon Processors
-.It
-Haswell E5 and E7 Xeon Processors
-.It
-Broadwell E5 and E7 Xeon Processors
-.It
-Skylake Xeon Scalable Processors
-.It
-Cascade Lake Xeon Scalable Processors
-.It
-Broadwell and Skylake Xeon-D processors
-.El
-.Pp
-Other lines involving the above microarchitectures, such as Xeon E3
-branded processors, are not supported as they do not provide the
-necessary hardware support.
-.Pp
-The
-.Nm
-driver is a pseudo-device driver that amalgamates all of the different
-.Xr imcstub 7D
-instances into a coherent view.
-The
-.Xr imcstub 7D
-driver attaches to all of the different PCI devices that the processor
-exposes.
-.Pp
-One challenge with the
-.Nm
-driver is the Intel Enhanced Machine Check Architecture v2
-.Pq EMCAv2 .
-Many vendors use EMCAv2 to hide memory errors from the operating system.
-Such systems limit the effectiveness of the
-.Nm
-driver and the fault management architecture by hiding correctable and
-uncorrectable DIMM errors from the operating system.
-.Pp
-The
-.Nm
-driver has a few limitations.
-Currently it does not always properly handle lockstep and mirroring
-mode, particularly in variants that are common on Skylake and newer
-systems.
-It also does not properly handle cases where Intel Optane NVDIMMs are in
-use on the memory bus.
-.Sh ARCHITECTURE
-The
-.Nm
-driver is only supported on specific Intel
-.Sy x86
-systems.
-.Sh FILES
-.Bl -tag -width Pa
-.It Pa /platform/i86pc/kernel/drv/amd64/imc
-64-bit device driver (x86).
-.It Pa /platform/i86pc/kernel/drv/imc.conf
-Driver configuration file.
-.El
-.Sh SEE ALSO
-.Xr fmadm 1M ,
-.Xr fmdump 1M ,
-.Xr imcstub 7D