From e4d6723c8c56349eb7dcf2528acdfc0f25f3f965 Mon Sep 17 00:00:00 2001
From: Josh Lay <me@jlay.io>
Date: Sat, 9 Nov 2024 04:04:25 -0600
Subject: [PATCH] ensure 'tuned-ppd' is absent (Fedora 41), +gamescope RT

---
 roles/tuned_amdgpu/files/rt_gamescope.sh | 33 ++++++++++++++++++++++++
 roles/tuned_amdgpu/tasks/main.yml        | 15 +++++++++++
 2 files changed, 48 insertions(+)
 create mode 100755 roles/tuned_amdgpu/files/rt_gamescope.sh

diff --git a/roles/tuned_amdgpu/files/rt_gamescope.sh b/roles/tuned_amdgpu/files/rt_gamescope.sh
new file mode 100755
index 0000000..82ad68b
--- /dev/null
+++ b/roles/tuned_amdgpu/files/rt_gamescope.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+#
+# script run by 'tuned' to ensure gamescope has the proper capability
+
+# Check for arguments
+if [ $# -eq 0 ]; then
+    echo "Usage: $0 {verify|start}"
+    exit 1
+fi
+
+function verify_cap() {
+        /usr/sbin/getcap "$(which gamescope)" |& grep 'sys_nice=eip'
+        return $?
+}
+
+function set_cap() {
+        /usr/sbin/setcap 'CAP_SYS_NICE=eip' "$(which gamescope)"
+}
+
+# Handle arguments
+case "$1" in
+    verify)
+        verify_cap
+        ;;
+    start)
+        set_cap
+        ;;
+    *)
+        echo "Invalid argument. Use 'verify' or 'start'."
+        exit 1
+        ;;
+esac
+
diff --git a/roles/tuned_amdgpu/tasks/main.yml b/roles/tuned_amdgpu/tasks/main.yml
index d22e160..9518ae3 100644
--- a/roles/tuned_amdgpu/tasks/main.yml
+++ b/roles/tuned_amdgpu/tasks/main.yml
@@ -22,6 +22,12 @@
     state: present
   become: true
 
+- name: Ensure 'tuned-ppd' is absent
+  ansible.builtin.package:
+    name: tuned-ppd
+    state: absent
+  become: true
+
 - name: Find bundled 'tuned' profiles
   ansible.builtin.find:
     paths:
@@ -85,6 +91,15 @@
   notify: Restart tuned
   become: true
 
+- name: Copy gamescope RT capability script
+  ansible.builtin.copy:
+    src: rt_gamescope.sh
+    dest: /etc/tuned/rt_gamescope.sh
+    owner: root
+    group: root
+    mode: '0755'
+  become: true
+
 - name: Template tuned.conf for custom profiles
   ansible.builtin.template:
     src: templates/tuned.conf.j2