[coreboot] KGPE-D16 SR-IOV problems (iommu groups) - Anyone else tried this?

[Taiidan at gmx.com]

On 01/23/2017 09:23 AM, Timothy Pearson wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On 01/21/2017 02:57 AM, Taiidan at gmx.com wrote:
>> It seems the PCI-e root ports on the KGPE-D16 have ARI which is needed
>> for SR-IOV, however it is not reported via # lspci -vv
>> I assume that is why the VF's are not assigned to IOMMU groups and thus
>> can't be assigned.
>>
>> I am running coreboot v4.5 (I forgot to note this as it is another late
>> night)
>>
>> Tim was the ARI feature implemented when you guys did the programming?
>> https://support.amd.com/TechDocs/44549.pdf
> We did not explicitly enable nor verify the ARI feature as we did not
> need it for our internal machines.  As always, this is something that we
> could definitely work on under contract, and I am always happy to review
> patches on Gerrit if you choose to tackle this on your own!
>
> - -- 
> Timothy Pearson
> Raptor Engineering
> +1 (415) 727-8645 (direct line)
> +1 (512) 690-0200 (switchboard)
> https://www.raptorengineering.com
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
>
> iQEcBAEBAgAGBQJYhhHzAAoJEK+E3vEXDOFbwP0IAIbCI5HLMEYNmDOeYyO/IYQT
> eVFMs+Bd2Q9bJA+x6e0D8MXL6LQzCOjxcg8qbeS4UuI6Kq6HszHqmKKH6rusmPqD
> Ew2DCffmoQnvsshmL/YvqPSL1SZhYWjjNCdUrBNCAvJAZLEh9Tef4eKpVp9aHjt4
> WBvrttU7uFyTf5zbWAPsOFfe2aQ0TNGlCgl+EOqJQWeIaHw+8gu6MPDOIc7aorJ/
> 2wC6ReI9iybAAlI0ZfYvsYFtuypqmJEOYmC/9uaU8xYtKOvrNumRPeJw1gB/m1yD
> Z1joJMC9WQ/1b9+L9D9wRnhFrYp00e5GVZYXWbSM31v81zjg+GKThsAZYwpTnO4=
> =haoQ
> -----END PGP SIGNATURE-----
TY for info.

I finally found some real info on ARI.
https://us-east.manta.joyent.com/jmc/public/opensolaris/ARChive/FWARC/2010/063/Materials/ari-support.txt
Apparently SR-IOV doesn't actually require it, it is only needed for 
more than 8 total functions per device.
I will continue troubleshooting and get back to you, SR-IOV is an 
important feature for today's modern servers so I will try to figure it out.

I would DIY but hardware engineering is currently above my paygrade, but 
when I get a job I am definitely going to do some bankrollin'