On Thu, Oct 29, 2020 at 11:07:27AM +0100, Vincent Whitchurch wrote: > On Wed, Oct 28, 2020 at 04:50:36PM +0100, Arnd Bergmann wrote: > > I think we should try to do something on top of the PCIe endpoint subsystem > > to make it work across arbitrary combinations of host and device > > implementations, > > and provide a superset of what the MIC driver, (out-of-tree) Bluefield > > endpoint > > driver, and the NTB subsystem as well as a couple of others used to do, > > each of them tunneling block/network/serial/... over a PCIe link of some > > sort, usually with virtio. > > VOP is not PCIe-specific (as demonstrated by the vop-loopback patches I > posted a while ago [1]), and it would be a shame for a replacement to be > tied to the PCIe endpoint subsystem. There are many SOCs out there > which have multiple Linux-capable processors without cache-coherency > between them. VOP is (or should I say was since I guess it's being > deleted) the closest we have in mainline to easily get generic virtio > (and not just rpmsg) running between these kind of Linux instances. If > a new replacement framework were to be PCIe-exclusive then we'd have to > invent one more framework for non-PCIe links to do pretty much the same > thing. > > [1] > https://lore.kernel.org/lkml/20190403104746.16063-1-vincent.whitchu...@axis.com/
If this works well, please restore the existing code and move it to a new directory and we can take it from there, right? thanks, greg k-h
