On Tue, Jan 28, 2025 at 07:57:03PM +0100, David Hildenbrand wrote: > This is based-on [1], which adds MSI-X support to virtio-balloon-pci, > but can be applied independently. > > Turns out it is fairly easy to get virtio-mem-pci running on s390x. We > only have to add MSI-X support to virtio-mem-pci, and wire-up the > (un)plugging in the machine. > > Tried some simple stuff (hotplug/hotunplug/resize/reboot), and all seems > to be working as expected. > > The kernel in the VM needs both, CONFIG_VIRTIO_PCI and CONFIG_VIRTIO_MEM > for it to work. > > [1] https://lkml.kernel.org/r/20250115161425.246348-1-ar...@linux.ibm.com
Fails CI: https://gitlab.com/mstredhat/qemu/-/jobs/9202574981 > v1 -> v2: > * There are no transitional/non_transitional devices for virtio-mem > * Spell out removal of "return;" in second patch > > Cc: Eduardo Habkost <edua...@habkost.net> > Cc: Marcel Apfelbaum <marcel.apfelb...@gmail.com> > Cc: Richard Henderson <richard.hender...@linaro.org> > Cc: David Hildenbrand <da...@redhat.com> > Cc: Ilya Leoshkevich <i...@linux.ibm.com> > Cc: Halil Pasic <pa...@linux.ibm.com> > Cc: Christian Borntraeger <borntrae...@linux.ibm.com> > Cc: Eric Farman <far...@linux.ibm.com> > Cc: Thomas Huth <th...@redhat.com> > Cc: "Michael S. Tsirkin" <m...@redhat.com> > Cc: Cornelia Huck <coh...@redhat.com> > Cc: Boris Fiuczynski <fiu...@linux.ibm.com> > Cc: Michal Privoznik <mpriv...@redhat.com> > Cc: Mario Casquero <mcasq...@redhat.com> > > David Hildenbrand (2): > virtio-mem-pci: Allow setting nvectors, so we can use MSI-X > s390x/s390-virtio-ccw: Support plugging PCI-based virtio memory > devices > > hw/core/machine.c | 1 + > hw/s390x/s390-virtio-ccw.c | 20 ++++++++++++++------ > hw/virtio/virtio-mem-pci.c | 12 ++++++++++++ > 3 files changed, 27 insertions(+), 6 deletions(-) > > -- > 2.48.1
