On Wed, Oct 07, 2020 at 08:14:06PM +0200, Daniel Vetter wrote: > Hm, but wouldn't need that the semi-nasty vma_open trick to make sure > that vma doesn't untimely disappear? Or is the idea to look up the > underlying vfio object, and refcount that directly? Ah, the patches Alex was working on had the refcount I think, it does need co-ordination across multiple VFIO instances IIRC. At least a simple check would guarentee we only have exposed PCI BAR pages which is not as bad security wise as the other stuff. Jason
