diff --git a/ansible/roles/cpu/files/cpu_set_perf_perc_linux_amd b/ansible/roles/cpu/files/cpu_set_perf_perc_linux_amd
index 74d04b1..1b38de7 100644
--- a/ansible/roles/cpu/files/cpu_set_perf_perc_linux_amd
+++ b/ansible/roles/cpu/files/cpu_set_perf_perc_linux_amd
@@ -8,6 +8,14 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 perc=$1
 
+if [ "$perc" -gt 80 ]; then
+    echo performance | tee /sys/firmware/acpi/platform_profile
+elif [ "$perc" -ge 20 ]; then
+    echo balanced | tee /sys/firmware/acpi/platform_profile
+else
+    echo low-power | tee /sys/firmware/acpi/platform_profile
+fi
+
 if [ "$perc" -ge 80 ]; then
     echo "performance" | tee /sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference
 elif [ "$perc" -ge 60 ]; then
diff --git a/ansible/roles/cpu/files/platform_profile_tmpfiles.conf b/ansible/roles/cpu/files/platform_profile_tmpfiles.conf
new file mode 100644
index 0000000..326a808
--- /dev/null
+++ b/ansible/roles/cpu/files/platform_profile_tmpfiles.conf
@@ -0,0 +1,2 @@
+# Favor energy efficiency for platform profile (EC / system, not CPU)
+w- /sys/firmware/acpi/platform_profile - - - - low-power
diff --git a/ansible/roles/cpu/tasks/linux_amd.yaml b/ansible/roles/cpu/tasks/linux_amd.yaml
index fa1c279..5305a6a 100644
--- a/ansible/roles/cpu/tasks/linux_amd.yaml
+++ b/ansible/roles/cpu/tasks/linux_amd.yaml
@@ -4,18 +4,29 @@
       - powertop
     state: present
 
-- name: Favor energy efficiency for Speed Shift
+- name: Favor energy efficiency for hardware p-states
   when: hwpstate is defined and hwpstate and cores is defined
   template:
     src: "templates/{{ item.src }}.j2"
     dest: "{{ item.dest }}"
-    mode: 0755
+    mode: 0644
     owner: root
     group: wheel
   loop:
     - src: energy_performance_preference.conf
       dest: /etc/tmpfiles.d/energy_performance_preference.conf
 
+- name: Install tmpfiles.d configuration
+  when: hwpstate is defined and hwpstate and cores is defined
+  copy:
+    src: "files/{{ item }}_tmpfiles.conf"
+    dest: "/etc/tmpfiles.d/{{ item }}.conf"
+    mode: 0644
+    owner: root
+    group: wheel
+  loop:
+    - platform_profile
+
 - name: Install scripts
   when: hwpstate is defined and hwpstate
   copy:
diff --git a/ansible/roles/cpu/tasks/linux_intel.yaml b/ansible/roles/cpu/tasks/linux_intel.yaml
index 6cac6c5..03ec383 100644
--- a/ansible/roles/cpu/tasks/linux_intel.yaml
+++ b/ansible/roles/cpu/tasks/linux_intel.yaml
@@ -19,7 +19,7 @@
   template:
     src: "templates/{{ item.src }}.j2"
     dest: "{{ item.dest }}"
-    mode: 0755
+    mode: 0644
     owner: root
     group: wheel
   loop: