On Tue, Jan 5, 2016 at 2:30 PM, Nicolas Blais <[email protected]> wrote:
> 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. > http://ark.intel.com/products/88177/Intel-Xeon-Processor-E3-1275-v5-8M-Cache-3_60-GHz Ark calls this a Skylake processor, which means it's based off the desktop processors just like previous generation E3. We know that Skylake does not have ACS on the processor root ports, so I'd put my money on no ACS support for E3 v5. Thanks, Alex
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