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