On Wed, Aug 28, 2024 at 06:49:27AM -0500, Doug Miller wrote: > > Typically in cases like this you'd paravirtualize some of the VF > > before sticking it in the VM so that there is a tidy channel between > > the VF driver and the VMM to do whatever this coordination is. There > > are many examples, but it is hard to see if you don't know the device > > architectures in detail. > > Can you give more detail on how this paravirtualization is accomplished? > Or point to an example? Not sure I have easy examples, several devices I've seen proxy things through their FW/HW. I think some of the Intel NICs were working like this. Some have full vfio-mdevs or qemu modules to intercept registers and build it. > It seems to me that rpmsg would be a cleaner solution, at least > until I can see how paravirtualization is implemented for > comparison. I think you will find it very hard to connect such a thing up throughout all the peices of software. Having two related devices across everything is not easy. Jason
