Re: [PATCH v5 19/20] kconfig: Activate IOMMUFD for s390x machines

[Matthew Rosato]

On 11/9/23 6:45 AM, Zhenzhong Duan wrote:
> From: Cédric Le Goater <clg@redhat.com>
> 
> Signed-off-by: Cédric Le Goater <clg@redhat.com>
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
> ---
>  hw/s390x/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/hw/s390x/Kconfig b/hw/s390x/Kconfig
> index 4c068d7960..26ad104485 100644
> --- a/hw/s390x/Kconfig
> +++ b/hw/s390x/Kconfig
> @@ -6,6 +6,7 @@ config S390_CCW_VIRTIO
>      imply VFIO_CCW
>      imply WDT_DIAG288
>      imply PCIE_DEVICES
> +    imply IOMMUFD
>      select PCI_EXPRESS
>      select S390_FLIC
>      select S390_FLIC_KVM if KVM

Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>

I also ran tests against vfio-pci (mlx, ism, nvme), vfio-ap and vfio-ccw on 
s390x with an iommufd-enabled host kernel + this series.  Testing included 
having qemu open both fds, passing in one fd and letting qemu open the other, 
and passing in both fds.