Add support for speedshift (hardware p-states).

ansible/environments/home/host_vars/homeserver

@@ -11,3 +11,4 @@ network_rc: "homeserver_network.conf"
 rc_conf: "homeserver_rc.conf"
 loader_conf: "homeserver_loader.conf"
 cputype: "intel"
+hwpstate: false

ansible/environments/laptop/host_vars/odofreebsd

@@ -12,3 +12,4 @@ rc_conf: "odofreebsd_rc.conf"
 loader_conf: "odofreebsd_loader.conf"
 cputype: "intel"
 hwpstate: true
+cores: 8

ansible/roles/cpu/files/cpu_set_perf_perc

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+#
+# Tell speedshift whether to maximize CPU performance (100) or energy
+# efficiency (0).
+set -euo pipefail
+IFS=$'\n\t'
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+perc=$1
+epp=$((100 - perc))
+
+sysctl -N dev.hwpstate_intel | grep -E 'dev.hwpstate_intel.[0-9]+.epp' | while read var; do
+    sysctl "$var=$epp"
+done

ansible/roles/cpu/files/percorespeedshift_loader.conf

@@ -0,0 +1,2 @@
+# Control each core individually
+machdep.hwpstate_pkg_ctrl=0

ansible/roles/cpu/tasks/freebsd_intel.yaml

@@ -46,3 +46,35 @@
   with_items:
     - src: powerdxxrc.conf
       dest: /etc/rc.conf.d/powerdxx
+
+- name: Favor energy efficiency for Speed Shift
+  when: hwpstate is defined and hwpstate and cores is defined
+  sysctl:
+    name: "dev.hwpstate_intel.{{ item }}.epp"
+    value: 100
+    state: present
+    sysctl_file: "/etc/sysctl.conf.local"
+  loop: "{{ range(0, cores, 1)|list }}"
+
+- name: Install scripts
+  when: hwpstate is defined and hwpstate
+  copy:
+    src: "files/{{ item.src }}"
+    dest: "{{ item.dest }}"
+    mode: 0755
+    owner: root
+    group: wheel
+  loop:
+    - src: cpu_set_perf_perc
+      dest: /usr/local/bin/cpu_set_perf_perc
+
+- name: Install loader.conf
+  when: hwpstate is defined and hwpstate
+  copy:
+    src: "files/{{ item }}_loader.conf"
+    dest: "/boot/loader.conf.d/{{ item }}.conf"
+    mode: 0644
+    owner: root
+    group: wheel
+  loop:
+    - percorespeedshift