include/linux/cpuhotplug.h

   1 #ifndef __CPUHOTPLUG_H
   2 #define __CPUHOTPLUG_H
   3
   4 #include <linux/types.h>
   5
   6 enum cpuhp_state {
   7         CPUHP_OFFLINE,
   8         CPUHP_CREATE_THREADS,
   9         CPUHP_PERF_PREPARE,
  10         CPUHP_PERF_X86_PREPARE,
  11         CPUHP_PERF_X86_AMD_UNCORE_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_X86_MCE_DEAD,
  18         CPUHP_VIRT_NET_DEAD,
  19         CPUHP_SLUB_DEAD,
  20         CPUHP_MM_WRITEBACK_DEAD,
  21         CPUHP_MM_VMSTAT_DEAD,
  22         CPUHP_SOFTIRQ_DEAD,
  23         CPUHP_NET_MVNETA_DEAD,
  24         CPUHP_CPUIDLE_DEAD,
  25         CPUHP_ARM64_FPSIMD_DEAD,
  26         CPUHP_ARM_OMAP_WAKE_DEAD,
  27         CPUHP_IRQ_POLL_DEAD,
  28         CPUHP_BLOCK_SOFTIRQ_DEAD,
  29         CPUHP_ACPI_CPUDRV_DEAD,
  30         CPUHP_S390_PFAULT_DEAD,
  31         CPUHP_BLK_MQ_DEAD,
  32         CPUHP_FS_BUFF_DEAD,
  33         CPUHP_PRINTK_DEAD,
  34         CPUHP_MM_MEMCQ_DEAD,
  35         CPUHP_PERCPU_CNT_DEAD,
  36         CPUHP_RADIX_DEAD,
  37         CPUHP_PAGE_ALLOC_DEAD,
  38         CPUHP_NET_DEV_DEAD,
  39         CPUHP_PCI_XGENE_DEAD,
  40         CPUHP_IOMMU_INTEL_DEAD,
  41         CPUHP_LUSTRE_CFS_DEAD,
  42         CPUHP_WORKQUEUE_PREP,
  43         CPUHP_POWER_NUMA_PREPARE,
  44         CPUHP_HRTIMERS_PREPARE,
  45         CPUHP_PROFILE_PREPARE,
  46         CPUHP_X2APIC_PREPARE,
  47         CPUHP_SMPCFD_PREPARE,
  48         CPUHP_RELAY_PREPARE,
  49         CPUHP_SLAB_PREPARE,
  50         CPUHP_MD_RAID5_PREPARE,
  51         CPUHP_RCUTREE_PREP,
  52         CPUHP_CPUIDLE_COUPLED_PREPARE,
  53         CPUHP_POWERPC_PMAC_PREPARE,
  54         CPUHP_POWERPC_MMU_CTX_PREPARE,
  55         CPUHP_XEN_PREPARE,
  56         CPUHP_XEN_EVTCHN_PREPARE,
  57         CPUHP_ARM_SHMOBILE_SCU_PREPARE,
  58         CPUHP_SH_SH3X_PREPARE,
  59         CPUHP_NET_FLOW_PREPARE,
  60         CPUHP_TOPOLOGY_PREPARE,
  61         CPUHP_NET_IUCV_PREPARE,
  62         CPUHP_ARM_BL_PREPARE,
  63         CPUHP_TRACE_RB_PREPARE,
  64         CPUHP_MM_ZS_PREPARE,
  65         CPUHP_MM_ZSWP_MEM_PREPARE,
  66         CPUHP_MM_ZSWP_POOL_PREPARE,
  67         CPUHP_KVM_PPC_BOOK3S_PREPARE,
  68         CPUHP_ZCOMP_PREPARE,
  69         CPUHP_TIMERS_DEAD,
  70         CPUHP_MIPS_SOC_PREPARE,
  71         CPUHP_BP_PREPARE_DYN,
  72         CPUHP_BP_PREPARE_DYN_END                = CPUHP_BP_PREPARE_DYN + 20,
  73         CPUHP_BRINGUP_CPU,
  74         CPUHP_AP_IDLE_DEAD,
  75         CPUHP_AP_OFFLINE,
  76         CPUHP_AP_SCHED_STARTING,
  77         CPUHP_AP_RCUTREE_DYING,
  78         CPUHP_AP_IRQ_GIC_STARTING,
  79         CPUHP_AP_IRQ_HIP04_STARTING,
  80         CPUHP_AP_IRQ_ARMADA_XP_STARTING,
  81         CPUHP_AP_IRQ_BCM2836_STARTING,
  82         CPUHP_AP_ARM_MVEBU_COHERENCY,
  83         CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
  84         CPUHP_AP_PERF_X86_STARTING,
  85         CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
  86         CPUHP_AP_PERF_X86_CQM_STARTING,
  87         CPUHP_AP_PERF_X86_CSTATE_STARTING,
  88         CPUHP_AP_PERF_XTENSA_STARTING,
  89         CPUHP_AP_PERF_METAG_STARTING,
  90         CPUHP_AP_MIPS_OP_LOONGSON3_STARTING,
  91         CPUHP_AP_ARM_VFP_STARTING,
  92         CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING,
  93         CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING,
  94         CPUHP_AP_PERF_ARM_ACPI_STARTING,
  95         CPUHP_AP_PERF_ARM_STARTING,
  96         CPUHP_AP_ARM_L2X0_STARTING,
  97         CPUHP_AP_ARM_ARCH_TIMER_STARTING,
  98         CPUHP_AP_ARM_GLOBAL_TIMER_STARTING,
  99         CPUHP_AP_JCORE_TIMER_STARTING,
 100         CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
 101         CPUHP_AP_ARM_TWD_STARTING,
 102         CPUHP_AP_METAG_TIMER_STARTING,
 103         CPUHP_AP_QCOM_TIMER_STARTING,
 104         CPUHP_AP_ARMADA_TIMER_STARTING,
 105         CPUHP_AP_MARCO_TIMER_STARTING,
 106         CPUHP_AP_MIPS_GIC_TIMER_STARTING,
 107         CPUHP_AP_ARC_TIMER_STARTING,
 108         CPUHP_AP_KVM_STARTING,
 109         CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING,
 110         CPUHP_AP_KVM_ARM_VGIC_STARTING,
 111         CPUHP_AP_KVM_ARM_TIMER_STARTING,
 112         /* Must be the last timer callback */
 113         CPUHP_AP_DUMMY_TIMER_STARTING,
 114         CPUHP_AP_ARM_XEN_STARTING,
 115         CPUHP_AP_ARM_CORESIGHT_STARTING,
 116         CPUHP_AP_ARM64_ISNDEP_STARTING,
 117         CPUHP_AP_SMPCFD_DYING,
 118         CPUHP_AP_X86_TBOOT_DYING,
 119         CPUHP_AP_ONLINE,
 120         CPUHP_TEARDOWN_CPU,
 121         CPUHP_AP_ONLINE_IDLE,
 122         CPUHP_AP_SMPBOOT_THREADS,
 123         CPUHP_AP_X86_VDSO_VMA_ONLINE,
 124         CPUHP_AP_IRQ_AFFINITY_ONLINE,
 125         CPUHP_AP_PERF_ONLINE,
 126         CPUHP_AP_PERF_X86_ONLINE,
 127         CPUHP_AP_PERF_X86_UNCORE_ONLINE,
 128         CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
 129         CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
 130         CPUHP_AP_PERF_X86_RAPL_ONLINE,
 131         CPUHP_AP_PERF_X86_CQM_ONLINE,
 132         CPUHP_AP_PERF_X86_CSTATE_ONLINE,
 133         CPUHP_AP_PERF_S390_CF_ONLINE,
 134         CPUHP_AP_PERF_S390_SF_ONLINE,
 135         CPUHP_AP_PERF_ARM_CCI_ONLINE,
 136         CPUHP_AP_PERF_ARM_CCN_ONLINE,
 137         CPUHP_AP_PERF_ARM_L2X0_ONLINE,
 138         CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE,
 139         CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE,
 140         CPUHP_AP_WORKQUEUE_ONLINE,
 141         CPUHP_AP_RCUTREE_ONLINE,
 142         CPUHP_AP_ONLINE_DYN,
 143         CPUHP_AP_ONLINE_DYN_END         = CPUHP_AP_ONLINE_DYN + 30,
 144         CPUHP_AP_X86_HPET_ONLINE,
 145         CPUHP_AP_X86_KVM_CLK_ONLINE,
 146         CPUHP_AP_ACTIVE,
 147         CPUHP_ONLINE,
 148 };
 149
 150 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
 151                         int (*startup)(unsigned int cpu),
 152                         int (*teardown)(unsigned int cpu), bool multi_instance);
 153
 154 int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name,
 155                                    bool invoke,
 156                                    int (*startup)(unsigned int cpu),
 157                                    int (*teardown)(unsigned int cpu),
 158                                    bool multi_instance);
 159 /**
 160  * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
 161  * @state:      The state for which the calls are installed
 162  * @name:       Name of the callback (will be used in debug output)
 163  * @startup:    startup callback function
 164  * @teardown:   teardown callback function
 165  *
 166  * Installs the callback functions and invokes the startup callback on
 167  * the present cpus which have already reached the @state.
 168  */
 169 static inline int cpuhp_setup_state(enum cpuhp_state state,
 170                                     const char *name,
 171                                     int (*startup)(unsigned int cpu),
 172                                     int (*teardown)(unsigned int cpu))
 173 {
 174         return __cpuhp_setup_state(state, name, true, startup, teardown, false);
 175 }
 176
 177 static inline int cpuhp_setup_state_cpuslocked(enum cpuhp_state state,
 178                                                const char *name,
 179                                                int (*startup)(unsigned int cpu),
 180                                                int (*teardown)(unsigned int cpu))
 181 {
 182         return __cpuhp_setup_state_cpuslocked(state, name, true, startup,
 183                                               teardown, false);
 184 }
 185
 186 /**
 187  * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
 188  *                             callbacks
 189  * @state:      The state for which the calls are installed
 190  * @name:       Name of the callback.
 191  * @startup:    startup callback function
 192  * @teardown:   teardown callback function
 193  *
 194  * Same as @cpuhp_setup_state except that no calls are executed are invoked
 195  * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
 196  */
 197 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
 198                                             const char *name,
 199                                             int (*startup)(unsigned int cpu),
 200                                             int (*teardown)(unsigned int cpu))
 201 {
 202         return __cpuhp_setup_state(state, name, false, startup, teardown,
 203                                    false);
 204 }
 205
 206 static inline int cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state,
 207                                                      const char *name,
 208                                                      int (*startup)(unsigned int cpu),
 209                                                      int (*teardown)(unsigned int cpu))
 210 {
 211         return __cpuhp_setup_state_cpuslocked(state, name, false, startup,
 212                                             teardown, false);
 213 }
 214
 215 /**
 216  * cpuhp_setup_state_multi - Add callbacks for multi state
 217  * @state:      The state for which the calls are installed
 218  * @name:       Name of the callback.
 219  * @startup:    startup callback function
 220  * @teardown:   teardown callback function
 221  *
 222  * Sets the internal multi_instance flag and prepares a state to work as a multi
 223  * instance callback. No callbacks are invoked at this point. The callbacks are
 224  * invoked once an instance for this state are registered via
 225  * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls.
 226  */
 227 static inline int cpuhp_setup_state_multi(enum cpuhp_state state,
 228                                           const char *name,
 229                                           int (*startup)(unsigned int cpu,
 230                                                          struct hlist_node *node),
 231                                           int (*teardown)(unsigned int cpu,
 232                                                           struct hlist_node *node))
 233 {
 234         return __cpuhp_setup_state(state, name, false,
 235                                    (void *) startup,
 236                                    (void *) teardown, true);
 237 }
 238
 239 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
 240                                bool invoke);
 241 int __cpuhp_state_add_instance_cpuslocked(enum cpuhp_state state,
 242                                           struct hlist_node *node, bool invoke);
 243
 244 /**
 245  * cpuhp_state_add_instance - Add an instance for a state and invoke startup
 246  *                            callback.
 247  * @state:      The state for which the instance is installed
 248  * @node:       The node for this individual state.
 249  *
 250  * Installs the instance for the @state and invokes the startup callback on
 251  * the present cpus which have already reached the @state. The @state must have
 252  * been earlier marked as multi-instance by @cpuhp_setup_state_multi.
 253  */
 254 static inline int cpuhp_state_add_instance(enum cpuhp_state state,
 255                                            struct hlist_node *node)
 256 {
 257         return __cpuhp_state_add_instance(state, node, true);
 258 }
 259
 260 /**
 261  * cpuhp_state_add_instance_nocalls - Add an instance for a state without
 262  *                                    invoking the startup callback.
 263  * @state:      The state for which the instance is installed
 264  * @node:       The node for this individual state.
 265  *
 266  * Installs the instance for the @state The @state must have been earlier
 267  * marked as multi-instance by @cpuhp_setup_state_multi.
 268  */
 269 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state,
 270                                                    struct hlist_node *node)
 271 {
 272         return __cpuhp_state_add_instance(state, node, false);
 273 }
 274
 275 static inline int
 276 cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state,
 277                                             struct hlist_node *node)
 278 {
 279         return __cpuhp_state_add_instance_cpuslocked(state, node, false);
 280 }
 281
 282 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
 283 void __cpuhp_remove_state_cpuslocked(enum cpuhp_state state, bool invoke);
 284
 285 /**
 286  * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
 287  * @state:      The state for which the calls are removed
 288  *
 289  * Removes the callback functions and invokes the teardown callback on
 290  * the present cpus which have already reached the @state.
 291  */
 292 static inline void cpuhp_remove_state(enum cpuhp_state state)
 293 {
 294         __cpuhp_remove_state(state, true);
 295 }
 296
 297 /**
 298  * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
 299  *                              teardown
 300  * @state:      The state for which the calls are removed
 301  */
 302 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
 303 {
 304         __cpuhp_remove_state(state, false);
 305 }
 306
 307 static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state)
 308 {
 309         __cpuhp_remove_state_cpuslocked(state, false);
 310 }
 311
 312 /**
 313  * cpuhp_remove_multi_state - Remove hotplug multi state callback
 314  * @state:      The state for which the calls are removed
 315  *
 316  * Removes the callback functions from a multi state. This is the reverse of
 317  * cpuhp_setup_state_multi(). All instances should have been removed before
 318  * invoking this function.
 319  */
 320 static inline void cpuhp_remove_multi_state(enum cpuhp_state state)
 321 {
 322         __cpuhp_remove_state(state, false);
 323 }
 324
 325 int __cpuhp_state_remove_instance(enum cpuhp_state state,
 326                                   struct hlist_node *node, bool invoke);
 327
 328 /**
 329  * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke
 330  *                               the teardown callback
 331  * @state:      The state from which the instance is removed
 332  * @node:       The node for this individual state.
 333  *
 334  * Removes the instance and invokes the teardown callback on the present cpus
 335  * which have already reached the @state.
 336  */
 337 static inline int cpuhp_state_remove_instance(enum cpuhp_state state,
 338                                               struct hlist_node *node)
 339 {
 340         return __cpuhp_state_remove_instance(state, node, true);
 341 }
 342
 343 /**
 344  * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state
 345  *                                       without invoking the reatdown callback
 346  * @state:      The state from which the instance is removed
 347  * @node:       The node for this individual state.
 348  *
 349  * Removes the instance without invoking the teardown callback.
 350  */
 351 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state,
 352                                                       struct hlist_node *node)
 353 {
 354         return __cpuhp_state_remove_instance(state, node, false);
 355 }
 356
 357 #ifdef CONFIG_SMP
 358 void cpuhp_online_idle(enum cpuhp_state state);
 359 #else
 360 static inline void cpuhp_online_idle(enum cpuhp_state state) { }
 361 #endif
 362
 363 #endif