On Wed, 23 Jan 2019 12:08:37 +0100 David Hildenbrand <da...@redhat.com> wrote:
> On 23.01.19 12:03, Cornelia Huck wrote: > > 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? > > > > I was confused, bridges don't attach to a zPCI device. So this remark is > invalid. Thanks! > Ok, I can remove point 1 when applying.
