Re: [PATCH v4 06/17] PCI: add SIOV and IMS capability detection

[Jason Gunthorpe]

On Wed, Nov 11, 2020 at 03:03:21PM -0800, Raj, Ashok wrote:

> By default the DVSEC is not presented to guest even when the full PF is
> presented to guest. I believe VFIO only builds and presents known standard
> capabilities and specific extended capabilities. I'm a bit weak but maybe
> @AlexWilliamson can confirm if I'm off track.

This also need to work on Hyper-V and all other cases, you can't just
assume everything is vfio and kvm.

It is horrible to ask people to go back an retroactively change their
config space in a device just to work around all the design failings
Thomas eloquantly describes :(

Jason