On Wed, Sep 16, 2020 at 12:07:54PM -0300, Jason Gunthorpe wrote: > On Tue, Sep 15, 2020 at 05:22:26PM -0700, Jacob Pan (Jun) wrote: > > > If user space wants to bind page tables, create the PASID with > > > /dev/sva, use ioctls there to setup the page table the way it wants, > > > then pass the now configured PASID to a driver that can use it. > > > > Are we talking about bare metal SVA? > > What a weird term. Glad you noticed it at v7 :-) Any suggestions on something less weird than Shared Virtual Addressing? There is a reason why we moved from SVM to SVA. > > > If so, I don't see the need for userspace to know there is a > > PASID. All user space need is that my current mm is bound to a > > device by the driver. So it can be a one-step process for user > > instead of two. > > You've missed the entire point of the conversation, VDPA already needs > more than "my current mm is bound to a device" You mean current version of vDPA? or a potential future version of vDPA? Cheers, Ashok
