Hi, You previously helped me with an issue on Z170 with the bios preventing the quirk from kicking in on the root ports, and Gigabyte fixed the bios for me. I must have thought that was more general.
Anyway, here's the correct lspci. https://paste.pound-python.org/show/CgR8EioN3hZoVsp7KYrF/ Let me know if you see anything, Thanks On Thu, Mar 9, 2017 at 9:17 AM, Alex Williamson <alex.l.william...@gmail.com > wrote: > On Thu, Mar 9, 2017 at 12:33 AM, Nick Sarnie <commendsar...@gmail.com> > wrote: > >> I expect Alex to find it's a BIOS bug. Also, the ACS patch does allow the >> groups to be made separating the GPUs(Wendell reported it didn't work), but >> I haven't gotten around to testing actual passthrough to see if there's >> some other issue(Maybe this is what he meant). I'll report if it works >> tomorrow. >> > > What evidence do you have to suggest a BIOS bug? ACS is a hardware > feature, so the only way I can imagine a BIOS bug being a factor is if the > BIOS has some ability to disable it by dropping it from the capability > chain. If you add one more 'x' to make it lspci -xxxx then we can see the > raw dump of the extended capability space, though ACS is a tiny capability, > it might be impossible to positively identify it if the capability ID is > masked. My guess is that it's either an oversight or marketing distinction > reserved for their server lines (we'll see once those ship), and that maybe > we can work with them to create quirks to expose isolation if it exists. > I've already started reaching out to AMD for this. Thanks, > > Alex >
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