Re:_freebsd_14.2_support_amd-vi（amd_8845hs_cpu）

From: Dave Cottlehuber <dch_at_skunkwerks.at>
Date: Mon, 21 Apr 2025 16:34:28 UTC 
On Mon, 21 Apr 2025, at 11:51, PstreeM China wrote:
> hello:
>
> I has upgrade my minipc to amd 8845hs.
> the base system is freebsd 14.2 release.

hi!

> during install new vm (use vm-bhyve), i want passthrough the wlan pcie 
> device to the guest os, there is an notification that : passthrough is 
> not support on this system (no vt-d or amd-vi).

> i checked that svm is enabled in the bios, yes there is.  and there is 
> also have amd-v information in the dmesg, yes there is.

Can you link to your dmesg, and also output of `pciconf -lv` ? this
should help figure out whether bhyve & freebsd aren't detecting the 
right things.

BTW online there are a number of people having issues with some 
miniPCs you may need to ask the miniPC vendor for confirmation.

https://bbs.bee-link.com/d/695-ser8-amd-ryzen-7-8845hs-how-to-enable-svm-mode-in-bios

> another thing is 14.2 has not support radeon 780m, install drm-61 and 
> load the kernel moxel  amdgpu breake the system to reboot.
>
> could you can give some suggestion ?
> 1.  has the freebsd 14.2 support amd-v when the cpu is amd 8845hs ? if 
> yes,.how can i do to fix the problem ?

It should do, lets see the dmesg etc.

> 2.  could freebsd 14.2 can support the radeon 780m gpu? 

should be fine in 14.2-RELEASE, other people are using this in framework
laptops, for example:

https://dmesgd.nycbug.org/index.cgi?do=view&id=8048

Did you follow https://docs.freebsd.org/en/books/handbook/x11/#x-configuration-amd if so is there anything of interest in xorg.log ?

A+
Dave