From 26f4174b0be7dcddf417c01d5c300521e2d4207f Mon Sep 17 00:00:00 2001
From: Felix Albrigtsen <felix@albrigtsen.it>
Date: Thu, 16 Jan 2025 21:51:00 +0100
Subject: [PATCH] challenger: set kernel params to prevent cpu hissy fits

---
 hosts/challenger/hardware-configuration.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hosts/challenger/hardware-configuration.nix b/hosts/challenger/hardware-configuration.nix
index d8e555f..a9b26fb 100644
--- a/hosts/challenger/hardware-configuration.nix
+++ b/hosts/challenger/hardware-configuration.nix
@@ -12,6 +12,12 @@
   boot.initrd.kernelModules = [ ];
   boot.kernelModules = [ "kvm-amd" ];
   boot.extraModulePackages = [ ];
+  boot.kernelParams = [
+    # https://wiki.gentoo.org/wiki/Ryzen#Ryzen_Threadripper
+    "processor.max_cstate=1"
+    "rcu_nocbs=0-11"
+    "idle=nomwait"
+  ];
 
   fileSystems."/" =
     { device = "/dev/disk/by-uuid/ea31d0ea-2949-420a-99ea-7f77c4b7091e";