Re: [RFC] /dev/ioasid uAPI proposal

Jason Gunthorpe
2021-06-02T17:24:32Z

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