Solved Hyper-V, FreeBSD 11 and pass-through disks

Has anyone gotten pass-through disks to work in Hyper-V with 11? I have it working with Linux but FreeBSD doesn't see the disks. They show up in dmesg when I boot the install DVD but no devices are created and the installer gives up.

Booting the same vm with a Ubuntu 17 install DVD detects the disks fine so I'm thinking it's something with FreeBSD.

Any ideas? Thanks!