RE: [PATCH vfio 11/11] vfio/virtio: Introduce a vfio driver over virtio devices

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> From: Jason Gunthorpe <jgg@xxxxxxxxxx>
> Sent: Friday, September 22, 2023 5:53 PM

> > And what's more, using MMIO BAR0 then it can work for legacy.
> Oh? How? Our team didn't think so.

It does not. It was already discussed.
The device reset in legacy is not synchronous.
The drivers do not wait for reset to complete; it was written for the sw backend.
Hence MMIO BAR0 is not the best option in real implementations.
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