RE: [Qemu-devel] Graphics Device Passthrough

[Stefano Stabellini]

On Sun, 23 May 2010, address@hidden wrote:
> In the options for qemu, I did see an option that allowed me to define a host 
> bus:dev:fn number to be accessible to the guest. This was not one of the USB 
> options I believe. So I assumed some kind of pass-through support is present.
> 
> For a PCI pass-through, we probably would not need to emulate the device 
> completely (or else what is the need of pass-through). We can emulate just a 
> few of the capabilities, and the command/INT registers that are needed to be 
> emulated. Even VMware pass-throughs the rest AFAIK. I didn’t realize qemu-kvm 
> did not have this support yet.
> 
> PS: I have read papers that read about similar experiments people have 
> carried on qemu. Didn't realize no code was checked back in the source tree. 
> Thanks for letting me know.
> 

Xen supports graphic device passthrought since version 4.0, if you are
interested the wiki page is here:

http://wiki.xensource.com/xenwiki/XenVGAPassthrough

depending on the device you want to passthrough it might be easy or very
difficult though...