include/linux/cpuhotplug.h

   1 #ifndef __CPUHOTPLUG_H
   2 #define __CPUHOTPLUG_H
   3
   4 enum cpuhp_state {
   5         CPUHP_OFFLINE,
   6         CPUHP_CREATE_THREADS,
   7         CPUHP_PERF_PREPARE,
   8         CPUHP_PERF_X86_PREPARE,
   9         CPUHP_PERF_X86_UNCORE_PREP,
  10         CPUHP_PERF_X86_AMD_UNCORE_PREP,
  11         CPUHP_PERF_X86_RAPL_PREP,
  12         CPUHP_PERF_BFIN,
  13         CPUHP_PERF_POWER,
  14         CPUHP_PERF_SUPERH,
  15         CPUHP_X86_HPET_DEAD,
  16         CPUHP_X86_APB_DEAD,
  17         CPUHP_WORKQUEUE_PREP,
  18         CPUHP_NOTIFY_PREPARE,
  19         CPUHP_BRINGUP_CPU,
  20         CPUHP_AP_IDLE_DEAD,
  21         CPUHP_AP_OFFLINE,
  22         CPUHP_AP_SCHED_STARTING,
  23         CPUHP_AP_IRQ_GIC_STARTING,
  24         CPUHP_AP_IRQ_GICV3_STARTING,
  25         CPUHP_AP_IRQ_HIP04_STARTING,
  26         CPUHP_AP_IRQ_ARMADA_XP_STARTING,
  27         CPUHP_AP_IRQ_ARMADA_CASC_STARTING,
  28         CPUHP_AP_IRQ_BCM2836_STARTING,
  29         CPUHP_AP_ARM_MVEBU_COHERENCY,
  30         CPUHP_AP_PERF_X86_UNCORE_STARTING,
  31         CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
  32         CPUHP_AP_PERF_X86_STARTING,
  33         CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
  34         CPUHP_AP_PERF_X86_CQM_STARTING,
  35         CPUHP_AP_PERF_X86_CSTATE_STARTING,
  36         CPUHP_AP_PERF_XTENSA_STARTING,
  37         CPUHP_AP_ARM_VFP_STARTING,
  38         CPUHP_AP_NOTIFY_STARTING,
  39         CPUHP_AP_ONLINE,
  40         CPUHP_TEARDOWN_CPU,
  41         CPUHP_AP_ONLINE_IDLE,
  42         CPUHP_AP_SMPBOOT_THREADS,
  43         CPUHP_AP_X86_VDSO_VMA_ONLINE,
  44         CPUHP_AP_PERF_ONLINE,
  45         CPUHP_AP_PERF_X86_ONLINE,
  46         CPUHP_AP_PERF_X86_UNCORE_ONLINE,
  47         CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
  48         CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
  49         CPUHP_AP_PERF_X86_RAPL_ONLINE,
  50         CPUHP_AP_PERF_X86_CQM_ONLINE,
  51         CPUHP_AP_PERF_X86_CSTATE_ONLINE,
  52         CPUHP_AP_PERF_S390_CF_ONLINE,
  53         CPUHP_AP_PERF_S390_SF_ONLINE,
  54         CPUHP_AP_PERF_ARM_CCI_ONLINE,
  55         CPUHP_AP_PERF_ARM_CCN_ONLINE,
  56         CPUHP_AP_WORKQUEUE_ONLINE,
  57         CPUHP_AP_NOTIFY_ONLINE,
  58         CPUHP_AP_ONLINE_DYN,
  59         CPUHP_AP_ONLINE_DYN_END         = CPUHP_AP_ONLINE_DYN + 30,
  60         CPUHP_AP_X86_HPET_ONLINE,
  61         CPUHP_AP_X86_KVM_CLK_ONLINE,
  62         CPUHP_AP_ACTIVE,
  63         CPUHP_ONLINE,
  64 };
  65
  66 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
  67                         int (*startup)(unsigned int cpu),
  68                         int (*teardown)(unsigned int cpu));
  69
  70 /**
  71  * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
  72  * @state:      The state for which the calls are installed
  73  * @name:       Name of the callback (will be used in debug output)
  74  * @startup:    startup callback function
  75  * @teardown:   teardown callback function
  76  *
  77  * Installs the callback functions and invokes the startup callback on
  78  * the present cpus which have already reached the @state.
  79  */
  80 static inline int cpuhp_setup_state(enum cpuhp_state state,
  81                                     const char *name,
  82                                     int (*startup)(unsigned int cpu),
  83                                     int (*teardown)(unsigned int cpu))
  84 {
  85         return __cpuhp_setup_state(state, name, true, startup, teardown);
  86 }
  87
  88 /**
  89  * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
  90  *                             callbacks
  91  * @state:      The state for which the calls are installed
  92  * @name:       Name of the callback.
  93  * @startup:    startup callback function
  94  * @teardown:   teardown callback function
  95  *
  96  * Same as @cpuhp_setup_state except that no calls are executed are invoked
  97  * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
  98  */
  99 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
 100                                             const char *name,
 101                                             int (*startup)(unsigned int cpu),
 102                                             int (*teardown)(unsigned int cpu))
 103 {
 104         return __cpuhp_setup_state(state, name, false, startup, teardown);
 105 }
 106
 107 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
 108
 109 /**
 110  * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
 111  * @state:      The state for which the calls are removed
 112  *
 113  * Removes the callback functions and invokes the teardown callback on
 114  * the present cpus which have already reached the @state.
 115  */
 116 static inline void cpuhp_remove_state(enum cpuhp_state state)
 117 {
 118         __cpuhp_remove_state(state, true);
 119 }
 120
 121 /**
 122  * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
 123  *                              teardown
 124  * @state:      The state for which the calls are removed
 125  */
 126 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
 127 {
 128         __cpuhp_remove_state(state, false);
 129 }
 130
 131 #ifdef CONFIG_SMP
 132 void cpuhp_online_idle(enum cpuhp_state state);
 133 #else
 134 static inline void cpuhp_online_idle(enum cpuhp_state state) { }
 135 #endif
 136
 137 #endif