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