Avi Kivity wrote: > > I dislike strings. They make it look as if you have a nice extensible > interface, where in reality you have a poorly documented interface which > leads to poor interoperability. Its not really a full fledged interface, but rather just a simple id mechanism. A decentralized id mechanism with less administrative burden. On the flip side, a centralized namespace has the advantage of controlling collisions at the expense of administrative overhead. After designing systems both ways in the past, I prefer to reduce the admin burden, but that is just me. > PCI means that you can reuse all of the platform's infrastructure for > irq allocation, discovery, device hotplug, and management. Its tempting to use, yes. However, most of that infrastructure is completely inappropriate for a PV implementation, IMHO. You are probably better off designing something that is PV specific instead of shoehorning it in to fit a different model (at least for the things I have in mind). Its not a heck of a lot of code to write a pv-centric version of these facilities. > You can write it for new guests but backporting it to older guests will be a > huge task. > > We will support non-pci for s390, but in order to support Windows and > older Linux PCI is necessary. I don't know if I would agree with "necessary". "Easier" perhaps. ;) By definition once you are PV you are hypervisor aware. Now its just a matter of plugging in the appropriate plumbing to bridge the hypervisor to the guest-os. Some might be easier than others, sure. But all should be extensible to a degree. But I digress. I haven't really had much of a chance to follow the latest developments here as I have been lost in -rt land for a few months now. But I know Anthony and Rusty are top-notch, so I'm sure you guys have it under control. Hopefully, one day soon I will be able to join you guys again (perhaps to the KVM team's dismay ;). Regards, -Greg _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
