Il 26/10/2012 12:37, Benjamin Herrenschmidt ha scritto: >> > Wiring which MSI-X interrupts go to which source controllers. If you >> > have one source controller per PCI bridge, you need to tell the kernel >> > the mapping between MSI messages interrupts and PCI bridges, and update >> > it whenever the MSI masking changes. > Not sure I get it. Are you talking in the context of PCI pass-through ? Not just that, it's also for emulated devices that do MSI-X (virtio-pci does). > > The other problem is configuring the redirection table. If you need >64 > > sources you need ioctls like KVM_GET/SET_IRQCHIP_ONE_REG. > Well, all of that is totally specific to the IO-APIC design & > limitations as far as I can tell. What is the "redirection table" ? The wiring between source and presentation controllers, roughly. I suppose that's what Paul referred to when he said there's 64 bits of config info per source in the source controllers. Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
