> Also, from a guest POV, how is the hw emulated local apic going to be > used? Are we going to route the interrupts from virtual devices > (netfront, blkfront) to the lapic? Or we just want it for the timer and > ditch the PV timer?
Use the event channels for the PV. For PCIe devices (passthrough) use the APIC. > > I can see that this is more interesting for a PVH/HVMlite Dom0, but > still in that case I'm not sure how a guest is supposed to interact with > it. Will the PHYSDEV hypercalls route interrupts to the emulated local > apic instead of pirqs event channels? Will we trap PCI/MSI/MSI-X > configuration and emulate it? The thought I had was that with VT-D posted interrupts would do the heavy lifting. And when the interrupts do get to us and have to vmexit - well we would do the normal HVM path for those that are interested. And for those that want the event callback vector - we can still do that. I hadn't thought much of details on this yet -perhaps this should be discussed next Developer summit to hash some of this out. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
