Re: [PATCH] s390x/pci: set kvm_msi_via_irqfd_allowed

[Eric Farman <farman@linux.ibm.com>]

On Wed, 2025-10-01 at 16:05 -0400, Matthew Rosato wrote:
> Allow irqfd to be used for virtio-pci on s390x if the kernel supports
> it.
> 
> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
> ---
>  hw/s390x/s390-pci-bus.c | 1 +
>  1 file changed, 1 insertion(+)

As Matt alluded to in another reply, this is probably just historical oversight.

Reviewed-by: Eric Farman <farman@linux.ibm.com>

> 
> diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
> index e8e41c8a9a..88852acf45 100644
> --- a/hw/s390x/s390-pci-bus.c
> +++ b/hw/s390x/s390-pci-bus.c
> @@ -900,6 +900,7 @@ static void s390_pcihost_realize(DeviceState *dev, Error **errp)
>      s390_pci_init_default_group();
>      css_register_io_adapters(CSS_IO_ADAPTER_PCI, true, false,
>                               S390_ADAPTER_SUPPRESSIBLE, errp);
> +    kvm_msi_via_irqfd_allowed = kvm_irqfds_enabled();
>  }
>  
>  static void s390_pcihost_unrealize(DeviceState *dev)