Re: [Qemu-devel] Re: [PATCH] Add VirtIO Frame Buffer Support

[Avi Kivity]

On 11/04/2009 06:35 PM, Anthony Liguori wrote:
> Vincent Hanquez wrote:
> > On Tue, Nov 03, 2009 at 11:38:18AM +0200, Avi Kivity wrote:
> > > On 11/03/2009 01:25 PM, Vincent Hanquez wrote:
> > > > not sure if i'm missing the point here, but couldn't it be 
> > > > hypothetically
> > > > extended to stuff 3d (or video&  more 2d accel ?) commands too ? I 
> > > > can't
> > > > imagine the cirrus or stdvga driver be able to do that ever ;)
> > > cirrus has pretty good 2d acceleration.  3D is a mega-project though.
> >
> > absolutely huge indeed, but still alexander's code is pretty much the
> > only way, to start such a project. with maybe added benefits on more
> > and easier 2d acceleration.
> >
> > or otherwise wait for SR-IOV graphics cards (or similar tech)...
>
> I think the real question is do we paravirtualize a VGA device or a 
> framebuffer.
>
> Obviously, the advantage of doing a framebuffer is that it works for 
> s390.
>
> A VGA device has better backwards compatibility on PCs although it's 
> obviously more complex.  In an ideal world, we could expose the virtio 
> framebuffer device as part of PCI device that was also VGA capable 
> (virtio-pci-vga transport?).
>
> But then there's QXL on the horizon which complicates matters further.

qxl is vga compatible.

> I'd say that virtio-fb should just focus on the s390 use case for 
> now.  Let things evolve as needed.

Sure.

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