> From: Michael S. Tsirkin <mst@xxxxxxxxxx> > Sent: Tuesday, September 26, 2023 12:06 AM > One can thinkably do that wait in hardware, though. Just defer completion until > read is done. > Once OASIS does such new interface and if some hw vendor _actually_ wants to do such complex hw, may be vfio driver can adopt to it. When we worked with you, we discussed that there such hw does not have enough returns and hence technical committee choose to proceed with admin commands. I will skip re-discussing all over it again here. The current virto spec is delivering the best trade-offs of functionality, performance and light weight implementation with future forward path towards more features as Jason explained such as migration. All with near zero driver, qemu and sw involvement for rapidly growing feature set...
