From 93177aa622da9c386335a351cfbcd5b68f96959b Mon Sep 17 00:00:00 2001
From: Nathan McCarty <nathan@mccarty.io>
Date: Thu, 8 Jun 2023 22:05:35 -0400
Subject: [PATCH] perf enable

---
 modules/linux/base.nix    | 10 ++++++++++
 modules/linux/default.nix |  1 +
 2 files changed, 11 insertions(+)

diff --git a/modules/linux/base.nix b/modules/linux/base.nix
index 164b72a..18c0230 100644
--- a/modules/linux/base.nix
+++ b/modules/linux/base.nix
@@ -26,6 +26,16 @@ with lib; {
         let unstable = inputs.nixpkgs-unstable.legacyPackages.${pkgs.system};
         in unstable.linuxKernel.packages.linux_lqx;
     })
+    (mkIf ((!config.nathan.config.harden) && config.nathan.config.isDesktop
+      && config.nathan.programs.perf) {
+        # Install perf and related tools
+        environment.systemPackages =
+          let unstable = inputs.nixpkgs-unstable.legacyPackages.${pkgs.system};
+          in [ unstable.linuxKernel.packages.linux_lqx.perf ];
+        # Allow users to use it
+        boot.kernel.sysctl."kernel.perf_event_paranoid" = -1;
+        boot.kernel.sysctl."kernel.kptr_restrict" = lib.mkForce 0;
+      })
     (mkIf config.nathan.config.isDesktop {
       # Setup frequency scaling
       powerManagement = {
diff --git a/modules/linux/default.nix b/modules/linux/default.nix
index e40618e..3e1e6ec 100644
--- a/modules/linux/default.nix
+++ b/modules/linux/default.nix
@@ -118,6 +118,7 @@ in {
             # Enabled by default on desktop
             binfmt = mkDefaultOption "binfmt" config.nathan.config.isDesktop;
           };
+          perf = mkDefaultOption "perf" config.nathan.config.isDesktop;
         };
         # Control enabling of hardware support
         hardware = {