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