Hotplugging of PCI bridges is right now pretty much broken. Coldplugging and hotplugging will assign wrong primary bus numbers in some scenarios.
I base my knowledge on how this is supposed to work on http://www.science.unitn.it/~fiorella/guidelinux/tlk/node76.html I did a couple of tests, building whole hierarchies of bridges, both hot and coldplugged. "info pci" as well as the Linux guests showed what I was expecting. David Hildenbrand (2): s390x/pci: Fix primary bus number for PCI bridges s390x/pci: Fix hotplugging of PCI bridges hw/s390x/s390-pci-bus.c | 41 +++++++++++++++++++++++++++-------------- 1 file changed, 27 insertions(+), 14 deletions(-) -- 2.17.2