Re: [Xen-devel] [Q] Is qemu used when we use VTd?

[Yuji Shimada <shimada-yxb@xxxxxxxxxxxxxxx>]

> I suspect MMCONFIG is needed to access Extended PCI
> configuration space of PCI-Express. Probably PCI-Express card
> can work without those access.
> But we can't use full features of PCI-Express cards, right?

Yes. For example, guest software can't use AER (Advanced Error
Reporting).

To use full features of PCI-Express, we need to implement Root Port
emulator into qemu, in addition to MMCONFIG.

Thanks,

--
Yuji Shimada

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