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_X86_HPET_DEAD,
  16         CPUHP_X86_APB_DEAD,
  17         CPUHP_WORKQUEUE_PREP,
  18         CPUHP_NOTIFY_PREPARE,
  19         CPUHP_BRINGUP_CPU,
  20         CPUHP_AP_IDLE_DEAD,
  21         CPUHP_AP_OFFLINE,
  22         CPUHP_AP_SCHED_STARTING,
  23         CPUHP_AP_IRQ_GIC_STARTING,
  24         CPUHP_AP_IRQ_GICV3_STARTING,
  25         CPUHP_AP_IRQ_HIP04_STARTING,
  26         CPUHP_AP_IRQ_ARMADA_XP_STARTING,
  27         CPUHP_AP_IRQ_ARMADA_CASC_STARTING,
  28         CPUHP_AP_IRQ_BCM2836_STARTING,
  29         CPUHP_AP_ARM_MVEBU_COHERENCY,
  30         CPUHP_AP_PERF_X86_UNCORE_STARTING,
  31         CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
  32         CPUHP_AP_PERF_X86_STARTING,
  33         CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
  34         CPUHP_AP_PERF_X86_CQM_STARTING,
  35         CPUHP_AP_PERF_X86_CSTATE_STARTING,
  36         CPUHP_AP_PERF_XTENSA_STARTING,
  37         CPUHP_AP_PERF_METAG_STARTING,
  38         CPUHP_AP_MIPS_OP_LOONGSON3_STARTING,
  39         CPUHP_AP_ARM_VFP_STARTING,
  40         CPUHP_AP_PERF_ARM_STARTING,
  41         CPUHP_AP_ARM_L2X0_STARTING,
  42         CPUHP_AP_ARM_ARCH_TIMER_STARTING,
  43         CPUHP_AP_DUMMY_TIMER_STARTING,
  44         CPUHP_AP_ARM_TWD_STARTING,
  45         CPUHP_AP_METAG_TIMER_STARTING,
  46         CPUHP_AP_QCOM_TIMER_STARTING,
  47         CPUHP_AP_MIPS_GIC_TIMER_STARTING,
  48         CPUHP_AP_KVM_STARTING,
  49         CPUHP_AP_KVM_ARM_VGIC_STARTING,
  50         CPUHP_AP_KVM_ARM_TIMER_STARTING,
  51         CPUHP_AP_ARM_XEN_STARTING,
  52         CPUHP_AP_ARM_CORESIGHT_STARTING,
  53         CPUHP_AP_LEDTRIG_STARTING,
  54         CPUHP_AP_NOTIFY_STARTING,
  55         CPUHP_AP_ONLINE,
  56         CPUHP_TEARDOWN_CPU,
  57         CPUHP_AP_ONLINE_IDLE,
  58         CPUHP_AP_SMPBOOT_THREADS,
  59         CPUHP_AP_X86_VDSO_VMA_ONLINE,
  60         CPUHP_AP_PERF_ONLINE,
  61         CPUHP_AP_PERF_X86_ONLINE,
  62         CPUHP_AP_PERF_X86_UNCORE_ONLINE,
  63         CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
  64         CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
  65         CPUHP_AP_PERF_X86_RAPL_ONLINE,
  66         CPUHP_AP_PERF_X86_CQM_ONLINE,
  67         CPUHP_AP_PERF_X86_CSTATE_ONLINE,
  68         CPUHP_AP_PERF_S390_CF_ONLINE,
  69         CPUHP_AP_PERF_S390_SF_ONLINE,
  70         CPUHP_AP_PERF_ARM_CCI_ONLINE,
  71         CPUHP_AP_PERF_ARM_CCN_ONLINE,
  72         CPUHP_AP_WORKQUEUE_ONLINE,
  73         CPUHP_AP_NOTIFY_ONLINE,
  74         CPUHP_AP_ONLINE_DYN,
  75         CPUHP_AP_ONLINE_DYN_END         = CPUHP_AP_ONLINE_DYN + 30,
  76         CPUHP_AP_X86_HPET_ONLINE,
  77         CPUHP_AP_X86_KVM_CLK_ONLINE,
  78         CPUHP_AP_ACTIVE,
  79         CPUHP_ONLINE,
  80 };
  81
  82 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
  83                         int (*startup)(unsigned int cpu),
  84                         int (*teardown)(unsigned int cpu));
  85
  86 /**
  87  * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
  88  * @state:      The state for which the calls are installed
  89  * @name:       Name of the callback (will be used in debug output)
  90  * @startup:    startup callback function
  91  * @teardown:   teardown callback function
  92  *
  93  * Installs the callback functions and invokes the startup callback on
  94  * the present cpus which have already reached the @state.
  95  */
  96 static inline int cpuhp_setup_state(enum cpuhp_state state,
  97                                     const char *name,
  98                                     int (*startup)(unsigned int cpu),
  99                                     int (*teardown)(unsigned int cpu))
 100 {
 101         return __cpuhp_setup_state(state, name, true, startup, teardown);
 102 }
 103
 104 /**
 105  * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
 106  *                             callbacks
 107  * @state:      The state for which the calls are installed
 108  * @name:       Name of the callback.
 109  * @startup:    startup callback function
 110  * @teardown:   teardown callback function
 111  *
 112  * Same as @cpuhp_setup_state except that no calls are executed are invoked
 113  * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
 114  */
 115 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
 116                                             const char *name,
 117                                             int (*startup)(unsigned int cpu),
 118                                             int (*teardown)(unsigned int cpu))
 119 {
 120         return __cpuhp_setup_state(state, name, false, startup, teardown);
 121 }
 122
 123 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
 124
 125 /**
 126  * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
 127  * @state:      The state for which the calls are removed
 128  *
 129  * Removes the callback functions and invokes the teardown callback on
 130  * the present cpus which have already reached the @state.
 131  */
 132 static inline void cpuhp_remove_state(enum cpuhp_state state)
 133 {
 134         __cpuhp_remove_state(state, true);
 135 }
 136
 137 /**
 138  * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
 139  *                              teardown
 140  * @state:      The state for which the calls are removed
 141  */
 142 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
 143 {
 144         __cpuhp_remove_state(state, false);
 145 }
 146
 147 #ifdef CONFIG_SMP
 148 void cpuhp_online_idle(enum cpuhp_state state);
 149 #else
 150 static inline void cpuhp_online_idle(enum cpuhp_state state) { }
 151 #endif
 152
 153 #endif