1# SPDX-License-Identifier: GPL-2.0-only 2menu "CPU Idle" 3 4config CPU_IDLE 5 bool "CPU idle PM support" 6 default y if ACPI || PPC_PSERIES 7 select CPU_IDLE_GOV_LADDER if (!NO_HZ && !NO_HZ_IDLE) 8 select CPU_IDLE_GOV_MENU if (NO_HZ || NO_HZ_IDLE) && !CPU_IDLE_GOV_TEO 9 help 10 CPU idle is a generic framework for supporting software-controlled 11 idle processor power management. It includes modular cross-platform 12 governors that can be swapped during runtime. 13 14 If you're using an ACPI-enabled platform, you should say Y here. 15 16if CPU_IDLE 17 18config CPU_IDLE_MULTIPLE_DRIVERS 19 bool 20 21config CPU_IDLE_GOV_LADDER 22 bool "Ladder governor (for periodic timer tick)" 23 24config CPU_IDLE_GOV_MENU 25 bool "Menu governor (for tickless system)" 26 27config CPU_IDLE_GOV_TEO 28 bool "Timer events oriented (TEO) governor (for tickless systems)" 29 help 30 This governor implements a simplified idle state selection method 31 focused on timer events and does not do any interactivity boosting. 32 33 Some workloads benefit from using it and it generally should be safe 34 to use. Say Y here if you are not happy with the alternatives. 35 36config CPU_IDLE_GOV_HALTPOLL 37 bool "Haltpoll governor (for virtualized systems)" 38 depends on KVM_GUEST 39 help 40 This governor implements haltpoll idle state selection, to be 41 used in conjunction with the haltpoll cpuidle driver, allowing 42 for polling for a certain amount of time before entering idle 43 state. 44 45 Some virtualized workloads benefit from using it. 46 47config DT_IDLE_STATES 48 bool 49 50config DT_IDLE_GENPD 51 depends on PM_GENERIC_DOMAINS_OF 52 bool 53 54menu "ARM CPU Idle Drivers" 55depends on ARM || ARM64 56source "drivers/cpuidle/Kconfig.arm" 57endmenu 58 59menu "MIPS CPU Idle Drivers" 60depends on MIPS 61source "drivers/cpuidle/Kconfig.mips" 62endmenu 63 64menu "POWERPC CPU Idle Drivers" 65depends on PPC 66source "drivers/cpuidle/Kconfig.powerpc" 67endmenu 68 69menu "RISC-V CPU Idle Drivers" 70depends on RISCV 71source "drivers/cpuidle/Kconfig.riscv" 72endmenu 73 74config HALTPOLL_CPUIDLE 75 tristate "Halt poll cpuidle driver" 76 depends on X86 && KVM_GUEST 77 default y 78 help 79 This option enables halt poll cpuidle driver, which allows to poll 80 before halting in the guest (more efficient than polling in the 81 host via halt_poll_ns for some scenarios). 82 83endif 84 85config ARCH_NEEDS_CPU_IDLE_COUPLED 86 def_bool n 87endmenu 88