On 11/10/2017 14:20, Cornelia Huck wrote:
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.
OK, thanks, I give it a try and propose a v2 on this basis.
--
Pierre Morel
Linux/KVM/QEMU in Böblingen - Germany
