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Release 4.15 include/linux/cpuhotplug.h

Directory: include/linux
/* 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_BFIN,
	
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_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_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_PERF_METAG_STARTING,
	
CPUHP_AP_MIPS_OP_LOONGSON3_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_ARM_ARCH_TIMER_STARTING,
	
CPUHP_AP_ARM_GLOBAL_TIMER_STARTING,
	
CPUHP_AP_JCORE_TIMER_STARTING,
	
CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
	
CPUHP_AP_ARM_TWD_STARTING,
	
CPUHP_AP_METAG_TIMER_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_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_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_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_WORKQUEUE_ONLINE,
	
CPUHP_AP_RCUTREE_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); }

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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); }

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/** * 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); }

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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); }

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/** * 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); }

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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); }

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/** * 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); }

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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); }

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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); }

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/** * 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); }

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static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state) { __cpuhp_remove_state_cpuslocked(state, false); }

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/** * 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); }

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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); }

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/** * 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); }

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#ifdef CONFIG_SMP void cpuhp_online_idle(enum cpuhp_state state); #else
static inline void cpuhp_online_idle(enum cpuhp_state state) { }

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#endif #endif

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Thomas Gleixner59759.46%2921.01%
Sebastian Andrzej Siewior29229.08%5640.58%
Richard Cochran535.28%2518.12%
Anna-Maria Gleixner141.39%75.07%
Peter Zijlstra80.80%21.45%
Richard Weinberger60.60%21.45%
Anju T60.60%32.17%
Shaokun Zhang60.60%32.17%
Paul Burton50.50%21.45%
Will Deacon40.40%21.45%
Mark Rutland40.40%21.45%
Agustin Vega-Frias20.20%10.72%
Rich Felker20.20%10.72%
Neil Leeder20.20%10.72%
Boris Ostrovsky20.20%10.72%
Greg Kroah-Hartman10.10%10.72%
Total1004100.00%138100.00%
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