From 7e9048b5a1690e9a5b3358f2ed7b1b7919d6c88b Mon Sep 17 00:00:00 2001
From: Antoine Viallon <antoine@lesviallon.fr>
Date: Mon, 27 Feb 2023 19:45:15 +0100
Subject: [PATCH] [Hardware] Fix crashes on AMD Zen 1 CPUs

Caused my Opcache issue.
Only real fix is to RMA the processor, but that is no longer an option
for me.
---
 hardware.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hardware.nix b/hardware.nix
index a1d6d45..6f1d870 100644
--- a/hardware.nix
+++ b/hardware.nix
@@ -3,6 +3,7 @@ with lib;
 let
   cfg = config.aviallon.hardware;
   desktopCfg = config.aviallon.desktop;
+  generalCfg = config.aviallon.general;
 in
 {
   options.aviallon.hardware = {  };
@@ -19,6 +20,13 @@ in
       ++ optional cfg.nvidia.enable pkgs.nvtop-nvidia
     ;
 
+    boot.kernel.sysctl = {
+
+      # Why: https://www.phoronix.com/news/Ryzen-Segv-Response
+      # Workaround: https://forums.gentoo.org/viewtopic-p-2605135.html#2605135
+      "kernel.randomize_va_space" = mkIf (generalCfg.cpuVendor == "amd" && generalCfg.cpuArch == "znver1" ) (warn "Disable Adress Space Layout Randomization on Ryzen 1 CPU" 0);
+    };
+
   };
 
 }