Re: [Xen-devel] iommu=dom0-passthrough behavior

["Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx>]

> So after I implemented a draft patch for this yesterday, my attention now
> was directed to phantom functions permitted by the PCIe spec (of which I
> was entirely unaware so far). While Linux to date doesn't enable them, I can't
> exclude that the BIOS might be (requested respective data to find out). And
> even if it doesn't, adding proper support for that functionality, and then
> putting a quirk on top of that would seem the much cleaner solution (pretty
> likely me_wifi_quirk() could then also be made fit in there).
> 
> Thoughts?
Agree, Xen doesn't have phantom functions supported with VT-d, so it is  better 
to create a quirk to fix such issues.  
Xiantao

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