[vfio-users] How to choose a compatible motherboard?

[Alex Williamson]

On Thu, Oct 22, 2015 at 5:29 PM, Nick Sukharev <nicksukharev at gmail.com>
wrote:

> Here you go:
> http://pastebin.com/He3EUWkn
>

00:01.0 PCI bridge: Intel Corporation Xeon E5 v3/Core i7 PCI Express Root
Port 1 (rev 02) (prog-if 00 [Normal decode])
        ....
        Capabilities: [110 v1] Access Control Services
                ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+
UpstreamFwd+ EgressCtrl- DirectTrans-
                ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+
UpstreamFwd+ EgressCtrl- DirectTrans-

00:01.1 PCI bridge: Intel Corporation Xeon E5 v3/Core i7 PCI Express Root
Port 1 (rev 02) (prog-if 00 [Normal decode])
        ....
        Capabilities: [110 v1] Access Control Services
                ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+
UpstreamFwd+ EgressCtrl- DirectTrans-
                ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+
UpstreamFwd+ EgressCtrl- DirectTrans-

00:03.0 PCI bridge: Intel Corporation Xeon E5 v3/Core i7 PCI Express Root
Port 3 (rev 02) (prog-if 00 [Normal decode])
        ....
        Capabilities: [110 v1] Access Control Services
                ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+
UpstreamFwd+ EgressCtrl- DirectTrans-
                ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+
UpstreamFwd+ EgressCtrl- DirectTrans-

Well, your processor root ports do support ACS, so you're right, a Xeon
wouldn't offer you an advantage in this space.  This goes against what I've
heard from Intel.  I don't know how to predict which Core processors will
include this feature.  Can others double check their processors for ACS and
report if they find it?  Anyone else with a Haswell-E as reported by ark or
a "High End Desktop Processor" as reported by ark that does or does not
expose ACS like above?
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