Re: [PATCHv3 RFC] virtio-pci: flexible configuration layout

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On Mon, 28 Nov 2011 11:15:31 +0200, Sasha Levin <levinsasha928@xxxxxxxxx> wrote:
> On Mon, 2011-11-28 at 11:25 +1030, Rusty Russell wrote:
> > I'd like to see kvmtools remove support for legacy mode altogether,
> > but they probably have existing users.
> 
> While we can't simply remove it right away, instead of mixing our
> implementation for both legacy and new spec in the same code we can
> split the virtio-pci implementation into two:
> 
> 	- virtio/virtio-pci-legacy.c
> 	- virtio/virtio-pci.c
> 
> At that point we can #ifdef the entire virtio-pci-legacy.c for now and
> remove it at the same time legacy virtio-pci is removed from the kernel.

Hmm, that might be neat, but we can't tell the driver core to try
virtio-pci before virtio-pci-legacy, so we need detection code in both
modules (and add a "force" flag to virtio-pci-legacy to tell it to
accept the device even if it's not a legacy-only one).

Then it should work...
Cheers,
Rusty.

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