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