On Wed, Jun 02, 2021 at 10:56:48AM +0200, Enrico Weigelt, metux IT consult wrote: > If I understand this correctly, /dev/ioasid is a kind of "common supplier" > to other APIs / devices. Why can't the fd be acquired by the > consumer APIs (eg. kvm, vfio, etc) ? /dev/ioasid would be similar to /dev/vfio, and everything already deals with exposing /dev/vfio and /dev/vfio/N together I don't see it as a problem, just more work. Having FDs spawn other FDs is pretty ugly, it defeats the "everything is a file" model of UNIX. Jason