Virtio input driver

modulename: virtio_input.ko

configname: CONFIG_VIRTIO_INPUT

Linux Kernel Configuration
└─>Device Drivers
└─>Virtio drivers
└─>Virtio input driver
In linux kernel since version 4.1 (release Date: 2015-06-21)  
This driver supports virtio input devices such as
keyboards, mice and tablets.

If unsure, say M.

source code:
drivers/virtio/virtio_input.c