SCSI passthrough request for the Virtio block driver

configname: CONFIG_VIRTIO_BLK_SCSI

Linux Kernel Configuration
└─>Device Drivers
└─>Block devices
└─>SCSI passthrough request for the Virtio block driver
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Enable support for SCSI passthrough (e.g. the SG_IO ioctl) on
virtio-blk devices. This is only supported for the legacy
virtio protocol and not enabled by default by any hypervisor.
You probably want to use virtio-scsi instead.