On Mon, 21 Jan 2019 14:42:48 +0100 David Hildenbrand <da...@redhat.com> wrote:
> PCI on s390x is really weird and how it was modeled in QEMU might not have > been the right choice. Anyhow, right now it is the case that: > - Hotplugging a PCI device will silently create a zPCI device > (if none is provided) > - Hotunplugging a zPCI device will unplug the PCI device (if any) > - Hotunplugging a PCI device will unplug also the zPCI device > As far as I can see, we can no longer change this behavior. But we > should fix it. > > Both device types are handled via a single hotplug handler call. This > is problematic for various reasons: > 1. Unplugging via the zPCI device allows to unplug PCI bridges as > checks are not performed - bad. Maybe I'm confused here, but how can a zPCI device couple with a bridge?
