I did some testing on a Haswell Xeon, and on a laptop with working
suspend/resume. I tested both i386 and amd64 on the laptop, but
do not own any 32-bit Intel CPUs. I plan to send a CFT.
To test the patch, we only need to tell the loader to load a file of type
"cpu_microcode". For instance, in loader.conf:
ucode_load="YES"
ucode_name="/boot/firmware/06-3f-02.6f"
ucode_type="cpu_microcode"