On Fri, 2012-06-08 at 16:47 +0200, Dominic Eschweiler wrote: > Am Freitag, den 08.06.2012, 08:16 -0600 schrieb Alex Williamson: > > Yes, thanks Jan. This is exactly what VFIO does. VFIO provides > > secure config space access, resource access, DMA mapping services, and > > full interrupt support to userspace. > > I know about VFIO, but we need some support for that stuff relatively > soon. That's the reason why I'm currently working on it to make UIO DMA > capable. My extensions probably do not play well with IOMMUs and they > therefore won't make it to mainline anyhow (i learned that today ;-). Yeah, VFIO was originally started by Tom Lyon as a uio extension to support DMA mapping and more extensive interrupt handling, but it became an entire re-write of uio. Now we've had to extend in to iommu grouping to get the DMA protection that we're really after. > > I'm currently working to get this upstream, probably targeting 3.6 at > > this point, and would love to have more users to help make that > > happen. > > Yes, you are faster than I'm able to ask. 3.6 is a good target and > really would like to support that. > > > Please take a look at the vfio-3.4 branch in the tree above. See this > > tree for Qemu's usage of VFIO for device assignment ... > > OK, I take look at it and report back (off the list). Please write me an > email if you need support. Thanks, Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
