2016-12-29 17:14, Stephen Hemminger: > On Thu, 29 Dec 2016 20:41:21 +0000 > "Walker, Benjamin" <benjamin.wal...@intel.com> wrote: > > My second question is whether the user should be allowed to > > mix uio and vfio usage simultaneously. For vfio, the > > physical addresses are really DMA addresses and are best > > when arbitrarily chosen to appear sequential relative to > > their virtual addresses. For uio, they are physical > > addresses and are not chosen at all. It seems that these two > > things are in conflict and that it will be difficult, ugly, > > and maybe impossible to resolve the simultaneous use of > > both. > > Unless application is running as privileged user (ie root), UIO > is not going to work. Therefore don't worry about mixed environment.
Yes, mixing UIO and VFIO is possible only as root. However, what is the benefit of mixing them?
