Re: [PATCH V1 vfio 9/9] vfio/virtio: Introduce a vfio driver over virtio devices

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On Wed, Oct 25, 2023 at 05:35:51PM +0300, Yishai Hadas wrote:
> > Do we want to make this only probe the correct subsystem vendor ID or do
> > we want to emulate the subsystem vendor ID as well?  I don't see this is
> > correct without one of those options.
> 
> Looking in the 1.x spec we can see the below.
> 
> Legacy Interfaces: A Note on PCI Device Discovery
> 
> "Transitional devices MUST have the PCI Subsystem
> Device ID matching the Virtio Device ID, as indicated in section 5 ...
> This is to match legacy drivers."
> 
> However, there is no need to enforce Subsystem Vendor ID.
> 
> This is what we followed here.
> 
> Makes sense ?

Won't work for legacy windows drivers.

-- 
MST

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