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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2018 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package builtin
const cpuControlSummary = `allows setting CPU tunables`
const cpuControlBaseDeclarationSlots = `
cpu-control:
allow-installation:
slot-snap-type:
- core
deny-auto-connection: true
`
const cpuControlConnectedPlugAppArmor = `
# Description: This interface allows for setting CPU tunables
/sys/devices/system/cpu/**/ r,
/sys/devices/system/cpu/cpu*/online rw,
/sys/devices/system/cpu/smt/* r,
/sys/devices/system/cpu/smt/control w,
/sys/module/cpu_boost/parameters/input_boost_freq rw,
/sys/module/cpu_boost/parameters/input_boost_ms rw,
/sys/devices/system/cpu/cpu[0-9]*/cpufreq/scaling_min_freq rw,
/sys/devices/system/cpu/cpu[0-9]*/cpufreq/scaling_max_freq rw,
/sys/devices/system/cpu/cpu[0-9]*/core_ctl/min_cpus rw,
/sys/devices/system/cpu/cpu[0-9]*/core_ctl/busy_up_thres rw,
/sys/devices/system/cpu/cpu[0-9]*/core_ctl/busy_down_thres rw,
/sys/devices/system/cpu/cpu[0-9]*/core_ctl/offline_delay_ms rw,
/sys/devices/system/cpu/cpu[0-9]*/core_ctl/task_thres rw,
/sys/devices/system/cpu/cpu[0-9]*/core_ctl/nr_prev_assist_thresh rw,
/sys/devices/system/cpu/cpu[0-9]*/core_ctl/enable rw,
# 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*/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/policy*/schedutil/up_rate_limit_us rw,
/sys/devices/system/cpu/cpufreq/policy*/schedutil/down_rate_limit_us rw,
/sys/devices/system/cpu/cpufreq/policy*/schedutil/hispeed_freq rw,
/sys/devices/system/cpu/cpufreq/policy*/schedutil/pl rw,
/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/intel_pstate/{,*} r,
/sys/devices/system/cpu/intel_pstate/hwp_dynamic_boost w,
/sys/devices/system/cpu/intel_pstate/max_perf_pct w,
/sys/devices/system/cpu/intel_pstate/min_perf_pct w,
/sys/devices/system/cpu/intel_pstate/no_turbo w,
/sys/devices/system/cpu/intel_pstate/status w,
/proc/sys/kernel/sched_upmigrate rw,
/proc/sys/kernel/sched_downmigrate rw,
/proc/sys/kernel/sched_group_upmigrate rw,
/proc/sys/kernel/sched_group_downmigrate rw,
/proc/sys/kernel/sched_walt_rotate_big_tasks rw,
/proc/sys/kernel/sched_boost rw,
# see https://www.osadl.org/monitoring/add-on-patches/4.16.7-rt1...4.16.15-rt7/sched-add-per-cpu-load-measurement.patch.html
/proc/idleruntime/{all,cpu[0-9]*}/data r,
/proc/idleruntime/{all,cpu[0-9]*}/reset w,
# Allow control CPU C-states switching see: https://docs.kernel.org/power/pm_qos_interface.html#pm-qos-framework
/dev/cpu_dma_latency rw,
# Allow interrupt affinity settings, see https://www.kernel.org/doc/html/latest/core-api/irq/irq-affinity.html
/sys/kernel/irq{/,/[0-9]**} r,
/proc/interrupts r,
/proc/irq/[0-9]*/smp_affinity rwk,
/proc/irq/[0-9]*/smp_affinity_list rwk,
/proc/irq/default_smp_affinity rwk,
`
var cpuControlConnectedPlugUDev = []string{
`SUBSYSTEM=="misc", KERNEL=="cpu_dma_latency"`,
}
func init() {
registerIface(&commonInterface{
name: "cpu-control",
summary: cpuControlSummary,
implicitOnCore: true,
implicitOnClassic: true,
baseDeclarationSlots: cpuControlBaseDeclarationSlots,
connectedPlugAppArmor: cpuControlConnectedPlugAppArmor,
connectedPlugUDev: cpuControlConnectedPlugUDev,
})
}
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