Re:_**[Help]_bhyve:_bootrom_alloc:_vm_mmap_mapseg:_I nvalid_argument_—_NVIDIA_passthrough_with_Corvin's_branch_ on_FreeBSD_15.0**

---> NVIDIA GPU passthrough should work with stock 15.0, no patches
required.

Hello my friend. Unfortunately it does not. Not even with 15.0-p9. With my
system it didn't work. If you go on the FreeBSD forums you see people
saying that they are still using the passthru on FreeBSD 14. One user
offered a patch that I have applied,but it didn't work. So I worked with
Claude to fix the bug and after some days of work,we developed the correct
patches. Now it is working fine. I attach them here,if you want to give a
look.

On Fri, Jun 5, 2026 at 8:34 AM Corvin Köhne <corvink@freebsd.org> wrote:

> On Thu, 2026-06-04 at 13:23 +0200, Mario Marietto wrote:
> >         Hi everyone,
> >  I'm trying to get NVIDIA GPU passthrough working with bhyve on FreeBSD
> 15.0-
> > RELEASE-p5, using Corvin Köhne's nvidia-wip branch:
> >
> https://github.com/Beckhoff/freebsd-src/tree/phab/corvink/15.0/nvidia-wip
> >  The VM fails to start with the following error before the guest even
> boots:
> >  bhyve: bootrom_alloc: vm_mmap_mapseg: Invalid argument
>
> NVIDIA GPU passthrough should work with stock 15.0, no patches required.
>
>
> --
> Best regards,
> Corvin
>


-- 
Mario.