Re: [Xen-users] Xen handling of graphics card

[Jean-Eric Cuendet <jec@xxxxxxxx>]

> In any form of VT/SVM system, as of right now, the entire system's
> hardware accesses are routed to an emulator (qemu for most operations,
> internal hypervisor emulator for a few select hardware items, such as
> the interrupt controller & timer). So Windows, or any other OS, will
> have a QEMU graphics window that displays it's output. So it's a "faked
> card bridged by Xen" in your words. 
>
> When Xen 3.x re-implements the Dom0 device hiding, you could, at least
> in theory, have two graphics cards and use one directly in Windows. 
But would it be possible to tell Xen to "give" the entire card to 
Windows and then get it back to dom0 and then back to Linux X11 domU and 
then to Windows domU, etc... ?
What you explain is that the only way of "sharing" the card between 2 
domU OSes is through a QEmu windows so no *Real* full screen neither 
full Windows acceleration. That means the desktop Linux/Windows in Xen 
will be hard to do.
-jec


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