Using a AMD Ryzen ThreadRipper with Fedora 27

Here's a collection of things that are useful to know if you are using a Ryzen ThreadRipper processor with Fedora.

• SVM works fine, nSVM currently does not. However, virt-manager on Fedora 27 wants to use the EPYC processor type. This gives me odd warnings in dmesg, like
  
  smpboot: do_boot_cpu failed(-1) to wakeup CPU#1
  
  
  To get rid of these, I use Opteron_G2 as my processor type, which seems to work fine.
  
• on the MSI x399 mainboard, if you want to read out your hardware sensors, you have to:

modprobe nct6775 force_id=0xd352

If you want to keep this after a reboot, do:

echo "options nct6775 force_id=0xd352" > /etc/modprobe.d/nct6775.conf
echo "nct6775" > /etc/modules-load.d/nct6775.conf

More to come :)