| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __CPUHOTPLUG_H |
| #define __CPUHOTPLUG_H |
| |
| #include <linux/types.h> |
| |
| /* |
| * CPU-up CPU-down |
| * |
| * BP AP BP AP |
| * |
| * OFFLINE OFFLINE |
| * | ^ |
| * v | |
| * BRINGUP_CPU->AP_OFFLINE BRINGUP_CPU <- AP_IDLE_DEAD (idle thread/play_dead) |
| * | AP_OFFLINE |
| * v (IRQ-off) ,---------------^ |
| * AP_ONLNE | (stop_machine) |
| * | TEARDOWN_CPU <- AP_ONLINE_IDLE |
| * | ^ |
| * v | |
| * AP_ACTIVE AP_ACTIVE |
| */ |
| |
| enum cpuhp_state { |
| CPUHP_INVALID = -1, |
| CPUHP_OFFLINE = 0, |
| CPUHP_CREATE_THREADS, |
| CPUHP_PERF_PREPARE, |
| CPUHP_PERF_X86_PREPARE, |
| CPUHP_PERF_X86_AMD_UNCORE_PREP, |
| CPUHP_PERF_POWER, |
| CPUHP_PERF_SUPERH, |
| CPUHP_X86_HPET_DEAD, |
| CPUHP_X86_APB_DEAD, |
| CPUHP_X86_MCE_DEAD, |
| CPUHP_VIRT_NET_DEAD, |
| CPUHP_SLUB_DEAD, |
| CPUHP_DEBUG_OBJ_DEAD, |
| CPUHP_MM_WRITEBACK_DEAD, |
| CPUHP_MM_VMSTAT_DEAD, |
| CPUHP_SOFTIRQ_DEAD, |
| CPUHP_NET_MVNETA_DEAD, |
| CPUHP_CPUIDLE_DEAD, |
| CPUHP_ARM64_FPSIMD_DEAD, |
| CPUHP_ARM_OMAP_WAKE_DEAD, |
| CPUHP_IRQ_POLL_DEAD, |
| CPUHP_BLOCK_SOFTIRQ_DEAD, |
| CPUHP_ACPI_CPUDRV_DEAD, |
| CPUHP_S390_PFAULT_DEAD, |
| CPUHP_BLK_MQ_DEAD, |
| CPUHP_FS_BUFF_DEAD, |
| CPUHP_PRINTK_DEAD, |
| CPUHP_MM_MEMCQ_DEAD, |
| CPUHP_PERCPU_CNT_DEAD, |
| CPUHP_RADIX_DEAD, |
| CPUHP_PAGE_ALLOC_DEAD, |
| CPUHP_NET_DEV_DEAD, |
| CPUHP_PCI_XGENE_DEAD, |
| CPUHP_IOMMU_INTEL_DEAD, |
| CPUHP_LUSTRE_CFS_DEAD, |
| CPUHP_AP_ARM_CACHE_B15_RAC_DEAD, |
| CPUHP_PADATA_DEAD, |
| CPUHP_WORKQUEUE_PREP, |
| CPUHP_POWER_NUMA_PREPARE, |
| CPUHP_HRTIMERS_PREPARE, |
| CPUHP_PROFILE_PREPARE, |
| CPUHP_X2APIC_PREPARE, |
| CPUHP_SMPCFD_PREPARE, |
| CPUHP_RELAY_PREPARE, |
| CPUHP_SLAB_PREPARE, |
| CPUHP_MD_RAID5_PREPARE, |
| CPUHP_RCUTREE_PREP, |
| CPUHP_CPUIDLE_COUPLED_PREPARE, |
| CPUHP_POWERPC_PMAC_PREPARE, |
| CPUHP_POWERPC_MMU_CTX_PREPARE, |
| CPUHP_XEN_PREPARE, |
| CPUHP_XEN_EVTCHN_PREPARE, |
| CPUHP_ARM_SHMOBILE_SCU_PREPARE, |
| CPUHP_SH_SH3X_PREPARE, |
| CPUHP_NET_FLOW_PREPARE, |
| CPUHP_TOPOLOGY_PREPARE, |
| CPUHP_NET_IUCV_PREPARE, |
| CPUHP_ARM_BL_PREPARE, |
| CPUHP_TRACE_RB_PREPARE, |
| CPUHP_MM_ZS_PREPARE, |
| CPUHP_MM_ZSWP_MEM_PREPARE, |
| CPUHP_MM_ZSWP_POOL_PREPARE, |
| CPUHP_KVM_PPC_BOOK3S_PREPARE, |
| CPUHP_ZCOMP_PREPARE, |
| CPUHP_TIMERS_PREPARE, |
| CPUHP_MIPS_SOC_PREPARE, |
| CPUHP_BP_PREPARE_DYN, |
| CPUHP_BP_PREPARE_DYN_END = CPUHP_BP_PREPARE_DYN + 20, |
| CPUHP_BRINGUP_CPU, |
| CPUHP_AP_IDLE_DEAD, |
| CPUHP_AP_OFFLINE, |
| CPUHP_AP_SCHED_STARTING, |
| CPUHP_AP_RCUTREE_DYING, |
| CPUHP_AP_CPU_PM_STARTING, |
| CPUHP_AP_IRQ_GIC_STARTING, |
| CPUHP_AP_IRQ_HIP04_STARTING, |
| CPUHP_AP_IRQ_ARMADA_XP_STARTING, |
| CPUHP_AP_IRQ_BCM2836_STARTING, |
| CPUHP_AP_IRQ_MIPS_GIC_STARTING, |
| CPUHP_AP_IRQ_RISCV_STARTING, |
| CPUHP_AP_IRQ_SIFIVE_PLIC_STARTING, |
| CPUHP_AP_ARM_MVEBU_COHERENCY, |
| CPUHP_AP_MICROCODE_LOADER, |
| CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING, |
| CPUHP_AP_PERF_X86_STARTING, |
| CPUHP_AP_PERF_X86_AMD_IBS_STARTING, |
| CPUHP_AP_PERF_X86_CQM_STARTING, |
| CPUHP_AP_PERF_X86_CSTATE_STARTING, |
| CPUHP_AP_PERF_XTENSA_STARTING, |
| CPUHP_AP_MIPS_OP_LOONGSON3_STARTING, |
| CPUHP_AP_ARM_SDEI_STARTING, |
| CPUHP_AP_ARM_VFP_STARTING, |
| CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING, |
| CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING, |
| CPUHP_AP_PERF_ARM_ACPI_STARTING, |
| CPUHP_AP_PERF_ARM_STARTING, |
| CPUHP_AP_ARM_L2X0_STARTING, |
| CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING, |
| CPUHP_AP_ARM_ARCH_TIMER_STARTING, |
| CPUHP_AP_ARM_GLOBAL_TIMER_STARTING, |
| CPUHP_AP_JCORE_TIMER_STARTING, |
| CPUHP_AP_ARM_TWD_STARTING, |
| CPUHP_AP_QCOM_TIMER_STARTING, |
| CPUHP_AP_TEGRA_TIMER_STARTING, |
| CPUHP_AP_ARMADA_TIMER_STARTING, |
| CPUHP_AP_MARCO_TIMER_STARTING, |
| CPUHP_AP_MIPS_GIC_TIMER_STARTING, |
| CPUHP_AP_ARC_TIMER_STARTING, |
| CPUHP_AP_RISCV_TIMER_STARTING, |
| CPUHP_AP_CLINT_TIMER_STARTING, |
| CPUHP_AP_CSKY_TIMER_STARTING, |
| CPUHP_AP_HYPERV_TIMER_STARTING, |
| CPUHP_AP_KVM_STARTING, |
| CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING, |
| CPUHP_AP_KVM_ARM_VGIC_STARTING, |
| CPUHP_AP_KVM_ARM_TIMER_STARTING, |
| /* Must be the last timer callback */ |
| CPUHP_AP_DUMMY_TIMER_STARTING, |
| CPUHP_AP_ARM_XEN_STARTING, |
| CPUHP_AP_ARM_CORESIGHT_STARTING, |
| CPUHP_AP_ARM_CORESIGHT_CTI_STARTING, |
| CPUHP_AP_ARM64_ISNDEP_STARTING, |
| CPUHP_AP_SMPCFD_DYING, |
| CPUHP_AP_X86_TBOOT_DYING, |
| CPUHP_AP_ARM_CACHE_B15_RAC_DYING, |
| CPUHP_AP_ONLINE, |
| CPUHP_TEARDOWN_CPU, |
| CPUHP_AP_ONLINE_IDLE, |
| CPUHP_AP_SCHED_WAIT_EMPTY, |
| CPUHP_AP_SMPBOOT_THREADS, |
| CPUHP_AP_X86_VDSO_VMA_ONLINE, |
| CPUHP_AP_IRQ_AFFINITY_ONLINE, |
| CPUHP_AP_BLK_MQ_ONLINE, |
| CPUHP_AP_ARM_MVEBU_SYNC_CLOCKS, |
| CPUHP_AP_X86_INTEL_EPB_ONLINE, |
| CPUHP_AP_PERF_ONLINE, |
| CPUHP_AP_PERF_X86_ONLINE, |
| CPUHP_AP_PERF_X86_UNCORE_ONLINE, |
| CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE, |
| CPUHP_AP_PERF_X86_AMD_POWER_ONLINE, |
| CPUHP_AP_PERF_X86_RAPL_ONLINE, |
| CPUHP_AP_PERF_X86_CQM_ONLINE, |
| CPUHP_AP_PERF_X86_CSTATE_ONLINE, |
| CPUHP_AP_PERF_S390_CF_ONLINE, |
| CPUHP_AP_PERF_S390_CFD_ONLINE, |
| CPUHP_AP_PERF_S390_SF_ONLINE, |
| CPUHP_AP_PERF_ARM_CCI_ONLINE, |
| CPUHP_AP_PERF_ARM_CCN_ONLINE, |
| CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE, |
| CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE, |
| CPUHP_AP_PERF_ARM_HISI_L3_ONLINE, |
| CPUHP_AP_PERF_ARM_L2X0_ONLINE, |
| CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE, |
| CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE, |
| CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE, |
| CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE, |
| CPUHP_AP_PERF_POWERPC_NEST_IMC_ONLINE, |
| CPUHP_AP_PERF_POWERPC_CORE_IMC_ONLINE, |
| CPUHP_AP_PERF_POWERPC_THREAD_IMC_ONLINE, |
| CPUHP_AP_PERF_POWERPC_TRACE_IMC_ONLINE, |
| CPUHP_AP_PERF_POWERPC_HV_24x7_ONLINE, |
| CPUHP_AP_PERF_POWERPC_HV_GPCI_ONLINE, |
| CPUHP_AP_PERF_CSKY_ONLINE, |
| CPUHP_AP_WATCHDOG_ONLINE, |
| CPUHP_AP_WORKQUEUE_ONLINE, |
| CPUHP_AP_RCUTREE_ONLINE, |
| CPUHP_AP_BASE_CACHEINFO_ONLINE, |
| CPUHP_AP_ONLINE_DYN, |
| CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30, |
| CPUHP_AP_X86_HPET_ONLINE, |
| CPUHP_AP_X86_KVM_CLK_ONLINE, |
| CPUHP_AP_DTPM_CPU_ONLINE, |
| CPUHP_AP_ACTIVE, |
| CPUHP_ONLINE, |
| }; |
| |
| int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke, |
| int (*startup)(unsigned int cpu), |
| int (*teardown)(unsigned int cpu), bool multi_instance); |
| |
| int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name, |
| bool invoke, |
| int (*startup)(unsigned int cpu), |
| int (*teardown)(unsigned int cpu), |
| bool multi_instance); |
| /** |
| * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks |
| * @state: The state for which the calls are installed |
| * @name: Name of the callback (will be used in debug output) |
| * @startup: startup callback function |
| * @teardown: teardown callback function |
| * |
| * Installs the callback functions and invokes the startup callback on |
| * the present cpus which have already reached the @state. |
| */ |
| static inline int cpuhp_setup_state(enum cpuhp_state state, |
| const char *name, |
| int (*startup)(unsigned int cpu), |
| int (*teardown)(unsigned int cpu)) |
| { |
| return __cpuhp_setup_state(state, name, true, startup, teardown, false); |
| } |
| |
| static inline int cpuhp_setup_state_cpuslocked(enum cpuhp_state state, |
| const char *name, |
| int (*startup)(unsigned int cpu), |
| int (*teardown)(unsigned int cpu)) |
| { |
| return __cpuhp_setup_state_cpuslocked(state, name, true, startup, |
| teardown, false); |
| } |
| |
| /** |
| * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the |
| * callbacks |
| * @state: The state for which the calls are installed |
| * @name: Name of the callback. |
| * @startup: startup callback function |
| * @teardown: teardown callback function |
| * |
| * Same as @cpuhp_setup_state except that no calls are executed are invoked |
| * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n. |
| */ |
| static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state, |
| const char *name, |
| int (*startup)(unsigned int cpu), |
| int (*teardown)(unsigned int cpu)) |
| { |
| return __cpuhp_setup_state(state, name, false, startup, teardown, |
| false); |
| } |
| |
| static inline int cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state, |
| const char *name, |
| int (*startup)(unsigned int cpu), |
| int (*teardown)(unsigned int cpu)) |
| { |
| return __cpuhp_setup_state_cpuslocked(state, name, false, startup, |
| teardown, false); |
| } |
| |
| /** |
| * cpuhp_setup_state_multi - Add callbacks for multi state |
| * @state: The state for which the calls are installed |
| * @name: Name of the callback. |
| * @startup: startup callback function |
| * @teardown: teardown callback function |
| * |
| * Sets the internal multi_instance flag and prepares a state to work as a multi |
| * instance callback. No callbacks are invoked at this point. The callbacks are |
| * invoked once an instance for this state are registered via |
| * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls. |
| */ |
| static inline int cpuhp_setup_state_multi(enum cpuhp_state state, |
| const char *name, |
| int (*startup)(unsigned int cpu, |
| struct hlist_node *node), |
| int (*teardown)(unsigned int cpu, |
| struct hlist_node *node)) |
| { |
| return __cpuhp_setup_state(state, name, false, |
| (void *) startup, |
| (void *) teardown, true); |
| } |
| |
| int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node, |
| bool invoke); |
| int __cpuhp_state_add_instance_cpuslocked(enum cpuhp_state state, |
| struct hlist_node *node, bool invoke); |
| |
| /** |
| * cpuhp_state_add_instance - Add an instance for a state and invoke startup |
| * callback. |
| * @state: The state for which the instance is installed |
| * @node: The node for this individual state. |
| * |
| * Installs the instance for the @state and invokes the startup callback on |
| * the present cpus which have already reached the @state. The @state must have |
| * been earlier marked as multi-instance by @cpuhp_setup_state_multi. |
| */ |
| static inline int cpuhp_state_add_instance(enum cpuhp_state state, |
| struct hlist_node *node) |
| { |
| return __cpuhp_state_add_instance(state, node, true); |
| } |
| |
| /** |
| * cpuhp_state_add_instance_nocalls - Add an instance for a state without |
| * invoking the startup callback. |
| * @state: The state for which the instance is installed |
| * @node: The node for this individual state. |
| * |
| * Installs the instance for the @state The @state must have been earlier |
| * marked as multi-instance by @cpuhp_setup_state_multi. |
| */ |
| static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state, |
| struct hlist_node *node) |
| { |
| return __cpuhp_state_add_instance(state, node, false); |
| } |
| |
| static inline int |
| cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state, |
| struct hlist_node *node) |
| { |
| return __cpuhp_state_add_instance_cpuslocked(state, node, false); |
| } |
| |
| void __cpuhp_remove_state(enum cpuhp_state state, bool invoke); |
| void __cpuhp_remove_state_cpuslocked(enum cpuhp_state state, bool invoke); |
| |
| /** |
| * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown |
| * @state: The state for which the calls are removed |
| * |
| * Removes the callback functions and invokes the teardown callback on |
| * the present cpus which have already reached the @state. |
| */ |
| static inline void cpuhp_remove_state(enum cpuhp_state state) |
| { |
| __cpuhp_remove_state(state, true); |
| } |
| |
| /** |
| * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking |
| * teardown |
| * @state: The state for which the calls are removed |
| */ |
| static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state) |
| { |
| __cpuhp_remove_state(state, false); |
| } |
| |
| static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state) |
| { |
| __cpuhp_remove_state_cpuslocked(state, false); |
| } |
| |
| /** |
| * cpuhp_remove_multi_state - Remove hotplug multi state callback |
| * @state: The state for which the calls are removed |
| * |
| * Removes the callback functions from a multi state. This is the reverse of |
| * cpuhp_setup_state_multi(). All instances should have been removed before |
| * invoking this function. |
| */ |
| static inline void cpuhp_remove_multi_state(enum cpuhp_state state) |
| { |
| __cpuhp_remove_state(state, false); |
| } |
| |
| int __cpuhp_state_remove_instance(enum cpuhp_state state, |
| struct hlist_node *node, bool invoke); |
| |
| /** |
| * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke |
| * the teardown callback |
| * @state: The state from which the instance is removed |
| * @node: The node for this individual state. |
| * |
| * Removes the instance and invokes the teardown callback on the present cpus |
| * which have already reached the @state. |
| */ |
| static inline int cpuhp_state_remove_instance(enum cpuhp_state state, |
| struct hlist_node *node) |
| { |
| return __cpuhp_state_remove_instance(state, node, true); |
| } |
| |
| /** |
| * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state |
| * without invoking the reatdown callback |
| * @state: The state from which the instance is removed |
| * @node: The node for this individual state. |
| * |
| * Removes the instance without invoking the teardown callback. |
| */ |
| static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state, |
| struct hlist_node *node) |
| { |
| return __cpuhp_state_remove_instance(state, node, false); |
| } |
| |
| #ifdef CONFIG_SMP |
| void cpuhp_online_idle(enum cpuhp_state state); |
| #else |
| static inline void cpuhp_online_idle(enum cpuhp_state state) { } |
| #endif |
| |
| #endif |