CONFIG_S390_GUEST is not available for thedefaultarchitecture x86.
Result is shown for architecture s390
s390 support for virtio devices
modulename: virtio_ccw.ko
configname: CONFIG_S390_GUEST
Linux Kernel Configuration
└─>Virtualization
└─>s390 support for virtio devices
In linux kernel since version 2.6.26 (release Date: 2008-07-13)
Enabling this option adds support for virtio based paravirtual device
drivers on s390.
Select this option if you want to run the kernel as a guest under
the KVM hypervisor.
drivers on s390.
Select this option if you want to run the kernel as a guest under
the KVM hypervisor.