interfaces/cpu-control: allow to control cpufreq tunables

Signed-off-by: Alex Murray <alex.murray@canonical.com>

interfaces/builtin/cpu_control.go

@@ -35,6 +35,24 @@ const cpuControlConnectedPlugAppArmor = `
 /sys/devices/system/cpu/cpu*/online rw,
 /sys/devices/system/cpu/smt/*       r,
 /sys/devices/system/cpu/smt/control w,
+
+# https://www.kernel.org/doc/html/latest/admin-guide/pm/cpufreq.html#policy-interface-in-sysfs
+/sys/devices/system/cpu/cpufreq/* r,
+/sys/devices/system/cpu/cpufreq/policy*/* r,
+/sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference w,
+/sys/devices/system/cpu/cpufreq/policy*/scaling_governor w,
+/sys/devices/system/cpu/cpufreq/policy*/scaling_max_freq w,
+/sys/devices/system/cpu/cpufreq/policy*/scaling_min_freq w,
+/sys/devices/system/cpu/cpufreq/policy*/scaling_setspeed w,
+/sys/devices/system/cpu/cpufreq/boost w,
+
+# https://www.kernel.org/doc/html/latest/admin-guide/pm/intel_pstate.html#user-space-interface-in-sysfs
+/sys/devices/system/cpu/cpufreq/intel_pstate/* r,
+/sys/devices/system/cpu/cpufreq/intel_pstate/hwp_dynamic_boost w,
+/sys/devices/system/cpu/cpufreq/intel_pstate/max_perf_pct w,
+/sys/devices/system/cpu/cpufreq/intel_pstate/min_perf_pct w,
+/sys/devices/system/cpu/cpufreq/intel_pstate/no_turbo w,
+/sys/devices/system/cpu/cpufreq/intel_pstate/status w,
 `
 
 func init() {