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RE: [Qemu-devel] Graphics Device Passthrough
From: |
Stefano Stabellini |
Subject: |
RE: [Qemu-devel] Graphics Device Passthrough |
Date: |
Mon, 24 May 2010 09:59:51 +0100 |
User-agent: |
Alpine 2.00 (DEB 1167 2008-08-23) |
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...