On Tue, 10 Oct 2017 18:01:53 +0200 Pierre Morel <pmo...@linux.vnet.ibm.com> wrote:
> Since in the case we have no AIS in KVM only PCI is impacted, do you > think we can fence IRQFD for MSI with > > kvm_msi_via_irqfd_allowed = false; > > in kvm_arch_init_irq_routing() ? Hm, it seems we never set that for s390x... does that imply that we never support irqfd for pci anyway? > > In fact, if we also verify the AIS availability in the same routine we > can avoid the ugly include of vfio/pci.h If we can get the serialization right (and setting that value to false does indeed have the desired effect), that's probably the way to go.
