VFIO PCI extensions for s390x KVM passthrough

configname: CONFIG_VFIO_PCI_ZDEV_KVM

Linux Kernel Configuration
└─>Device Drivers
└─>VFIO Non-Privileged userspace driver framework
└─>PCI support
└─>VFIO support for PCI devices
└─>VFIO PCI extensions for s390x KVM passthrough
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Support s390x-specific extensions to enable support for enhancements
to KVM passthrough capabilities, such as interpretive execution of
zPCI instructions.

To enable s390x KVM vfio-pci extensions, say Y.