[Bug 248514] jedec_dimm(4) and imcsmb(4): support of memory controllers in Skylake and newer Intel CPUs

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248514

            Bug ID: 248514
           Summary: jedec_dimm(4) and imcsmb(4): support of memory
                    controllers in Skylake and newer Intel CPUs
           Product: Base System
           Version: 12.1-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: vvd at unislabs.com
                CC: avg at FreeBSD.org, rpokala at FreeBSD.org

I have 1st generation Xeon Scalable 3104 (Skylake) and after "kldload smb
imcsmb jedec_dimm" can't find any related sysctl variables, which are described
in the manuals.

Datasheets:

* Skylake:
xeon-scalable-mem-ds-vol2-336062-r003.pdf:
https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-scalable-datasheet-vol-1.pdf
xeon-scalable-family-vol-1-ds-336063-002.pdf:
https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-scalable-datasheet-vol-2.pdf
(messed order)

* Cascade Lake:
2nd-gen-xeon-scalable-datasheet-vol-1.pdf:
https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/2nd-gen-xeon-scalable-datasheet-vol-1.pdf
2nd-gen-xeon-scalable-datasheet-vol-2.pdf:
https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/2nd-gen-xeon-scalable-datasheet-vol-2.pdf

* Cooper Lake:
Can't find datasheets for 3rd gen of Xeon Scalable.

Thanks!

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