[Intel-wired-lan] PCI ACS quirk for X710/XL710?

Chris Friesen chris.friesen at windriver.com
Tue Dec 1 16:07:48 UTC 2015

Hi all,

The three of you in the "to" list were involved with adding commits d748804 and 
100ebb2 to address the fact that these multi-port NICs will not do peer-to-peer 
between functions, but do not report this via ACS.

We've got an X710 device (PCI device 0x1572, driver version 1.3.1-k, firmware 
4.40) and we're seeing all the ports being assigned to the same IOMMU group.

I'm guessing that this is due to a lack of ACS, and that it would be valid to 
add the X710/XL710 PCI IDs to the pci_dev_acs_enabled table.  Could someone from 
Intel confirm this?

Assuming such a quirk is needed, do we have a suitable list of device IDs?


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