Just random info point, but i can pass thru and intel arc card to bhyve just fine if I tell the driver to not attempt ReBAR in the guest

Aside form the workaround, way more pleasant than nvidia quadro's

[illumos-gate] 15511 zfs: Unify mount and share for 'zfs create/clone' -- Brian Behlendorf <behlendorf1⊙lg>