bhyve PCI pass-through to Linux guest

[Sergey Manucharian]

Hello,

I have a working Linux guest in bhyve (Debian). Trying to pass through a
PCI device (USB controller) by adding a couple of options:

# bhyve -S ... -s 7,passthru,0/20/0 ...

That causes bhyve termination right away with error:
Unable to setup memory (17)

Exactly the same option with passing the same USB controller to Windows 2012
guest works perfectly.

The only difference (by my understanding) is that I load UEFI for Windows
and use grub-bhyve for Linux.

What should I check?

Thanks,
Sergey