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_PERF_SUPERH,
  15         CPUHP_WORKQUEUE_PREP,
  16         CPUHP_NOTIFY_PREPARE,
  17         CPUHP_BRINGUP_CPU,
  18         CPUHP_AP_IDLE_DEAD,
  19         CPUHP_AP_OFFLINE,
  20         CPUHP_AP_SCHED_STARTING,
  21         CPUHP_AP_IRQ_GIC_STARTING,
  22         CPUHP_AP_IRQ_GICV3_STARTING,
  23         CPUHP_AP_IRQ_HIP04_STARTING,
  24         CPUHP_AP_IRQ_ARMADA_XP_STARTING,
  25         CPUHP_AP_IRQ_ARMADA_CASC_STARTING,
  26         CPUHP_AP_IRQ_BCM2836_STARTING,
  27         CPUHP_AP_ARM_MVEBU_COHERENCY,
  28         CPUHP_AP_PERF_X86_UNCORE_STARTING,
  29         CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
  30         CPUHP_AP_PERF_X86_STARTING,
  31         CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
  32         CPUHP_AP_PERF_X86_CQM_STARTING,
  33         CPUHP_AP_PERF_X86_CSTATE_STARTING,
  34         CPUHP_AP_PERF_XTENSA_STARTING,
  35         CPUHP_AP_NOTIFY_STARTING,
  36         CPUHP_AP_ONLINE,
  37         CPUHP_TEARDOWN_CPU,
  38         CPUHP_AP_ONLINE_IDLE,
  39         CPUHP_AP_SMPBOOT_THREADS,
  40         CPUHP_AP_X86_VDSO_VMA_ONLINE,
  41         CPUHP_AP_PERF_ONLINE,
  42         CPUHP_AP_PERF_X86_ONLINE,
  43         CPUHP_AP_PERF_X86_UNCORE_ONLINE,
  44         CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
  45         CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
  46         CPUHP_AP_PERF_X86_RAPL_ONLINE,
  47         CPUHP_AP_PERF_X86_CQM_ONLINE,
  48         CPUHP_AP_PERF_X86_CSTATE_ONLINE,
  49         CPUHP_AP_PERF_S390_CF_ONLINE,
  50         CPUHP_AP_PERF_S390_SF_ONLINE,
  51         CPUHP_AP_PERF_ARM_CCI_ONLINE,
  52         CPUHP_AP_PERF_ARM_CCN_ONLINE,
  53         CPUHP_AP_WORKQUEUE_ONLINE,
  54         CPUHP_AP_NOTIFY_ONLINE,
  55         CPUHP_AP_ONLINE_DYN,
  56         CPUHP_AP_ONLINE_DYN_END         = CPUHP_AP_ONLINE_DYN + 30,
  57         CPUHP_AP_ACTIVE,
  58         CPUHP_ONLINE,
  59 };
  60
  61 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
  62                         int (*startup)(unsigned int cpu),
  63                         int (*teardown)(unsigned int cpu));
  64
  65 /**
  66  * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
  67  * @state:      The state for which the calls are installed
  68  * @name:       Name of the callback (will be used in debug output)
  69  * @startup:    startup callback function
  70  * @teardown:   teardown callback function
  71  *
  72  * Installs the callback functions and invokes the startup callback on
  73  * the present cpus which have already reached the @state.
  74  */
  75 static inline int cpuhp_setup_state(enum cpuhp_state state,
  76                                     const char *name,
  77                                     int (*startup)(unsigned int cpu),
  78                                     int (*teardown)(unsigned int cpu))
  79 {
  80         return __cpuhp_setup_state(state, name, true, startup, teardown);
  81 }
  82
  83 /**
  84  * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
  85  *                             callbacks
  86  * @state:      The state for which the calls are installed
  87  * @name:       Name of the callback.
  88  * @startup:    startup callback function
  89  * @teardown:   teardown callback function
  90  *
  91  * Same as @cpuhp_setup_state except that no calls are executed are invoked
  92  * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
  93  */
  94 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
  95                                             const char *name,
  96                                             int (*startup)(unsigned int cpu),
  97                                             int (*teardown)(unsigned int cpu))
  98 {
  99         return __cpuhp_setup_state(state, name, false, startup, teardown);
 100 }
 101
 102 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
 103
 104 /**
 105  * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
 106  * @state:      The state for which the calls are removed
 107  *
 108  * Removes the callback functions and invokes the teardown callback on
 109  * the present cpus which have already reached the @state.
 110  */
 111 static inline void cpuhp_remove_state(enum cpuhp_state state)
 112 {
 113         __cpuhp_remove_state(state, true);
 114 }
 115
 116 /**
 117  * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
 118  *                              teardown
 119  * @state:      The state for which the calls are removed
 120  */
 121 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
 122 {
 123         __cpuhp_remove_state(state, false);
 124 }
 125
 126 #ifdef CONFIG_SMP
 127 void cpuhp_online_idle(enum cpuhp_state state);
 128 #else
 129 static inline void cpuhp_online_idle(enum cpuhp_state state) { }
 130 #endif
 131
 132 #endif