No, it's not..... It's scsi-generic nature, I think.
Proof:
On hypervisor:
# /usr/bin/kvm -id 500 \
........... output skipped ..............
-drive file=iscsi://192.168.107.23/iqn.2005-05.com.sdsys1:pool2t/4,if=none,id=drive-scsi3,iops_rd=50,iops_wr=50,aio=native,cache=none,detect-zeroes=on \...