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