On Sat, Sep 30, 2017 at 02:30:16PM +0530, Abhishek Shah wrote: > > On a similar note, we also break CMB usage in virutalization with direct > > assigned devices: the guest doesn't know the host physical bus address, > > so it sets the CMB queue address incorrectly there, too. I don't know of > > a way to fix that other than disabling CMB. > > I don't have much idea on CMB usage in virtualization... will let > someone else comment on this. It's okay, I think it's a gap in the NVMe specification that would allow such usage.