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_NOTIFY_STARTING,
  27         CPUHP_AP_ONLINE,
  28         CPUHP_TEARDOWN_CPU,
  29         CPUHP_AP_ONLINE_IDLE,
  30         CPUHP_AP_SMPBOOT_THREADS,
  31         CPUHP_AP_X86_VDSO_VMA_ONLINE,
  32         CPUHP_AP_PERF_ONLINE,
  33         CPUHP_AP_PERF_X86_ONLINE,
  34         CPUHP_AP_PERF_X86_UNCORE_ONLINE,
  35         CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
  36         CPUHP_AP_NOTIFY_ONLINE,
  37         CPUHP_AP_ONLINE_DYN,
  38         CPUHP_AP_ONLINE_DYN_END         = CPUHP_AP_ONLINE_DYN + 30,
  39         CPUHP_AP_ACTIVE,
  40         CPUHP_ONLINE,
  41 };
  42
  43 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
  44                         int (*startup)(unsigned int cpu),
  45                         int (*teardown)(unsigned int cpu));
  46
  47 /**
  48  * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
  49  * @state:      The state for which the calls are installed
  50  * @name:       Name of the callback (will be used in debug output)
  51  * @startup:    startup callback function
  52  * @teardown:   teardown callback function
  53  *
  54  * Installs the callback functions and invokes the startup callback on
  55  * the present cpus which have already reached the @state.
  56  */
  57 static inline int cpuhp_setup_state(enum cpuhp_state state,
  58                                     const char *name,
  59                                     int (*startup)(unsigned int cpu),
  60                                     int (*teardown)(unsigned int cpu))
  61 {
  62         return __cpuhp_setup_state(state, name, true, startup, teardown);
  63 }
  64
  65 /**
  66  * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
  67  *                             callbacks
  68  * @state:      The state for which the calls are installed
  69  * @name:       Name of the callback.
  70  * @startup:    startup callback function
  71  * @teardown:   teardown callback function
  72  *
  73  * Same as @cpuhp_setup_state except that no calls are executed are invoked
  74  * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
  75  */
  76 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
  77                                             const char *name,
  78                                             int (*startup)(unsigned int cpu),
  79                                             int (*teardown)(unsigned int cpu))
  80 {
  81         return __cpuhp_setup_state(state, name, false, startup, teardown);
  82 }
  83
  84 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
  85
  86 /**
  87  * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
  88  * @state:      The state for which the calls are removed
  89  *
  90  * Removes the callback functions and invokes the teardown callback on
  91  * the present cpus which have already reached the @state.
  92  */
  93 static inline void cpuhp_remove_state(enum cpuhp_state state)
  94 {
  95         __cpuhp_remove_state(state, true);
  96 }
  97
  98 /**
  99  * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
 100  *                              teardown
 101  * @state:      The state for which the calls are removed
 102  */
 103 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
 104 {
 105         __cpuhp_remove_state(state, false);
 106 }
 107
 108 #ifdef CONFIG_SMP
 109 void cpuhp_online_idle(enum cpuhp_state state);
 110 #else
 111 static inline void cpuhp_online_idle(enum cpuhp_state state) { }
 112 #endif
 113
 114 #endif