On Tuesday 12 February 2013, Jason Gunthorpe wrote: > PCI-E hotplug can be supported through the generic /sys/bus/pci/rescan > mechanism, which forces a rediscovery/re-evaluation of all the buses > in the system. The PCI core is smart enough to know what it can/can > not reassign and can move the bridge windows around (IIRC most of the > issues here are resolved these days?). > > For PCI-E, the root port bridge can be placed anywhere in the host > aperture, so as long as the host aperture isn't filled the core can > allocate a memory region for the now active port. > > Thomas's driver should support this as the regions and windows are all > properly dynamic. Ah, so you only allow hotplugging into the root ports, but not behind additional bridges that have active devices on them, right? I guess that is a common limitation for PCIe hotplugging. > This is one reason why re-using the PCI core code is so desirable, it > handles all these complexities. Ok, I'm starting to understand what the entire discussion is about ;) Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
