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