Hi, I am interested in building a rig with 2 PCIE GPU's in pass-through with a Xeon E3 1200 v5 series (not the v3), likely the E3 1275 v5. I was wondering if it supported ACS on root ports or not. Reading the following: http://vfio.blogspot.ca/2015/10/intel-processors-with-acs-support.html, no mention of the v5 series.
Intel's specification update ( https://www-ssl.intel.com/content/dam/www/public/us/en/documents/specification-updates/xeon-e3-1200v3-spec-update.pdf) specifically states the v3 do not have ACS support in PCIE root ports, while for the v5 series, ( https://www-ssl.intel.com/content/dam/www/public/us/en/documents/specification-updates/xeon-e3-1200v5-spec-update.pdf) has no mention. Browsing through the archives, I landed on an message ( https://www.redhat.com/archives/vfio-users/2015-October/msg00211.html) which talks about the v5 but no clear mention of whether or not it supports ACS on root ports. Cheers, Nick
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