Marcel Apfelbaum <marcel.apfelb...@gmail.com> 于2018年9月20日周四 下午2:41写道： > > Hi Zihan, Gerd > > On 09/20/2018 09:09 AM, Gerd Hoffmann wrote: > >>>> As for the management, will some checks when adding mcfg be enough for > >>>> management? Or I can maintain a variable to indicate how many space > >>>> have been consumed and warn the user if they exceed the threshold? > >>>> The latter allows us to do the check when the pxb-pcie is initializing. > >>> I think qemu should not apply any restrictions here. > >> But will that confuse users when their device is not listed in guest os > >> while qemu does not throw any error/warning? > > Well, that can happen anyway. For example when using an old seabios > > version without pci domain support, or other firmware without pci domain > > support (coreboot, ovmf). And there is no easy way for qemu to figure > > this beforehand. > > > > You can detect this later, when generating the acpi tables, that there > > are expander bridges where the hidden pci bar wasn't configured by the > > firmware. Logging a warning in that case - pointing out the missing > > firmware support - is probably a good idea. > > Logging a warning if the pxb-pci was not configured is enough I think. > It will also help in case QEMU uses other firmware not supporting > multiple PCI domains at all, e.g. OVMF (for now), or an older SeaBIOS.
OK, will be added in next version. > > Thanks, > Marcel > > > cheers, > > Gerd > > >
