diff options
Diffstat (limited to '')
| -rw-r--r-- | include/linux/cpuhotplug.h | 399 |
1 files changed, 399 insertions, 0 deletions
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h new file mode 100644 index 000000000..60efd9810 --- /dev/null +++ b/include/linux/cpuhotplug.h @@ -0,0 +1,399 @@ +/* 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_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_RANDOM_PREPARE, + 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_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_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_OMAP_DM_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_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_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_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_SMPBOOT_THREADS, + CPUHP_AP_X86_VDSO_VMA_ONLINE, + CPUHP_AP_IRQ_AFFINITY_ONLINE, + CPUHP_AP_ARM_MVEBU_SYNC_CLOCKS, + 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_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_POWERPC_NEST_IMC_ONLINE, + CPUHP_AP_PERF_POWERPC_CORE_IMC_ONLINE, + CPUHP_AP_PERF_POWERPC_THREAD_IMC_ONLINE, + CPUHP_AP_WATCHDOG_ONLINE, + CPUHP_AP_WORKQUEUE_ONLINE, + CPUHP_AP_RANDOM_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_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 |