[Qemu-devel] [RFC PATCH 0/4] MSI affinity for assigned devices

[Alex Williamson <alex.williamson@redhat.com>]

This is post-1.3 material, so I'll just post it as an RFC for now.

MSI routing updates aren't currently handled by pci-assign or
vfio-pci (when using KVM acceleration), which means that trying to
set interrupt SMP affinity in the guest has no effect unless MSI is
completely disabled and re-enabled.  This series fixes this for both
device assignment backends using similar schemes.  We store the last
MSIMessage programmed to KVM and do updates to the MSI route when it
changes.  pci-assign takes a little bit of refactoring to make this
happen cleanly.  Thanks,

Alex

---

Alex Williamson (4):
      kvm: Stub kvm_irqchip_update_msi_route
      vfio-pci: Add support for MSI affinity
      pci-assign: Refactor MSI virq array
      pci-assign: Add MSI affinity support


 hw/kvm/pci-assign.c |   80 +++++++++++++++++++++++++++++++++++----------------
 hw/vfio_pci.c       |   31 ++++++++++++++++++--
 kvm-all.c           |    5 +++
 kvm-stub.c          |    5 +++
 4 files changed, 93 insertions(+), 28 deletions(-)