1 #ifndef __CPUHOTPLUG_H 2 #define __CPUHOTPLUG_H 3 4 #include <linux/types.h> 5 6 /* 7 * CPU-up CPU-down 8 * 9 * BP AP BP AP 10 * 11 * OFFLINE OFFLINE 12 * | ^ 13 * v | 14 * BRINGUP_CPU->AP_OFFLINE BRINGUP_CPU <- AP_IDLE_DEAD (idle thread/play_dead) 15 * | AP_OFFLINE 16 * v (IRQ-off) ,---------------^ 17 * AP_ONLNE | (stop_machine) 18 * | TEARDOWN_CPU <- AP_ONLINE_IDLE 19 * | ^ 20 * v | 21 * AP_ACTIVE AP_ACTIVE 22 */ 23 24 enum cpuhp_state { 25 CPUHP_INVALID = -1, 26 CPUHP_OFFLINE = 0, 27 CPUHP_CREATE_THREADS, 28 CPUHP_PERF_PREPARE, 29 CPUHP_PERF_X86_PREPARE, 30 CPUHP_PERF_X86_AMD_UNCORE_PREP, 31 CPUHP_PERF_BFIN, 32 CPUHP_PERF_POWER, 33 CPUHP_PERF_SUPERH, 34 CPUHP_X86_HPET_DEAD, 35 CPUHP_X86_APB_DEAD, 36 CPUHP_X86_MCE_DEAD, 37 CPUHP_VIRT_NET_DEAD, 38 CPUHP_SLUB_DEAD, 39 CPUHP_MM_WRITEBACK_DEAD, 40 CPUHP_MM_VMSTAT_DEAD, 41 CPUHP_SOFTIRQ_DEAD, 42 CPUHP_NET_MVNETA_DEAD, 43 CPUHP_CPUIDLE_DEAD, 44 CPUHP_ARM64_FPSIMD_DEAD, 45 CPUHP_ARM_OMAP_WAKE_DEAD, 46 CPUHP_IRQ_POLL_DEAD, 47 CPUHP_BLOCK_SOFTIRQ_DEAD, 48 CPUHP_ACPI_CPUDRV_DEAD, 49 CPUHP_S390_PFAULT_DEAD, 50 CPUHP_BLK_MQ_DEAD, 51 CPUHP_FS_BUFF_DEAD, 52 CPUHP_PRINTK_DEAD, 53 CPUHP_MM_MEMCQ_DEAD, 54 CPUHP_PERCPU_CNT_DEAD, 55 CPUHP_RADIX_DEAD, 56 CPUHP_PAGE_ALLOC_DEAD, 57 CPUHP_NET_DEV_DEAD, 58 CPUHP_PCI_XGENE_DEAD, 59 CPUHP_IOMMU_INTEL_DEAD, 60 CPUHP_LUSTRE_CFS_DEAD, 61 CPUHP_WORKQUEUE_PREP, 62 CPUHP_POWER_NUMA_PREPARE, 63 CPUHP_HRTIMERS_PREPARE, 64 CPUHP_PROFILE_PREPARE, 65 CPUHP_X2APIC_PREPARE, 66 CPUHP_SMPCFD_PREPARE, 67 CPUHP_RELAY_PREPARE, 68 CPUHP_SLAB_PREPARE, 69 CPUHP_MD_RAID5_PREPARE, 70 CPUHP_RCUTREE_PREP, 71 CPUHP_CPUIDLE_COUPLED_PREPARE, 72 CPUHP_POWERPC_PMAC_PREPARE, 73 CPUHP_POWERPC_MMU_CTX_PREPARE, 74 CPUHP_XEN_PREPARE, 75 CPUHP_XEN_EVTCHN_PREPARE, 76 CPUHP_ARM_SHMOBILE_SCU_PREPARE, 77 CPUHP_SH_SH3X_PREPARE, 78 CPUHP_NET_FLOW_PREPARE, 79 CPUHP_TOPOLOGY_PREPARE, 80 CPUHP_NET_IUCV_PREPARE, 81 CPUHP_ARM_BL_PREPARE, 82 CPUHP_TRACE_RB_PREPARE, 83 CPUHP_MM_ZS_PREPARE, 84 CPUHP_MM_ZSWP_MEM_PREPARE, 85 CPUHP_MM_ZSWP_POOL_PREPARE, 86 CPUHP_KVM_PPC_BOOK3S_PREPARE, 87 CPUHP_ZCOMP_PREPARE, 88 CPUHP_TIMERS_DEAD, 89 CPUHP_MIPS_SOC_PREPARE, 90 CPUHP_BP_PREPARE_DYN, 91 CPUHP_BP_PREPARE_DYN_END = CPUHP_BP_PREPARE_DYN + 20, 92 CPUHP_BRINGUP_CPU, 93 CPUHP_AP_IDLE_DEAD, 94 CPUHP_AP_OFFLINE, 95 CPUHP_AP_SCHED_STARTING, 96 CPUHP_AP_RCUTREE_DYING, 97 CPUHP_AP_IRQ_GIC_STARTING, 98 CPUHP_AP_IRQ_HIP04_STARTING, 99 CPUHP_AP_IRQ_ARMADA_XP_STARTING, 100 CPUHP_AP_IRQ_BCM2836_STARTING, 101 CPUHP_AP_ARM_MVEBU_COHERENCY, 102 CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING, 103 CPUHP_AP_PERF_X86_STARTING, 104 CPUHP_AP_PERF_X86_AMD_IBS_STARTING, 105 CPUHP_AP_PERF_X86_CQM_STARTING, 106 CPUHP_AP_PERF_X86_CSTATE_STARTING, 107 CPUHP_AP_PERF_XTENSA_STARTING, 108 CPUHP_AP_PERF_METAG_STARTING, 109 CPUHP_AP_MIPS_OP_LOONGSON3_STARTING, 110 CPUHP_AP_ARM_VFP_STARTING, 111 CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING, 112 CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING, 113 CPUHP_AP_PERF_ARM_ACPI_STARTING, 114 CPUHP_AP_PERF_ARM_STARTING, 115 CPUHP_AP_ARM_L2X0_STARTING, 116 CPUHP_AP_ARM_ARCH_TIMER_STARTING, 117 CPUHP_AP_ARM_GLOBAL_TIMER_STARTING, 118 CPUHP_AP_JCORE_TIMER_STARTING, 119 CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING, 120 CPUHP_AP_ARM_TWD_STARTING, 121 CPUHP_AP_METAG_TIMER_STARTING, 122 CPUHP_AP_QCOM_TIMER_STARTING, 123 CPUHP_AP_ARMADA_TIMER_STARTING, 124 CPUHP_AP_MARCO_TIMER_STARTING, 125 CPUHP_AP_MIPS_GIC_TIMER_STARTING, 126 CPUHP_AP_ARC_TIMER_STARTING, 127 CPUHP_AP_KVM_STARTING, 128 CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING, 129 CPUHP_AP_KVM_ARM_VGIC_STARTING, 130 CPUHP_AP_KVM_ARM_TIMER_STARTING, 131 /* Must be the last timer callback */ 132 CPUHP_AP_DUMMY_TIMER_STARTING, 133 CPUHP_AP_ARM_XEN_STARTING, 134 CPUHP_AP_ARM_CORESIGHT_STARTING, 135 CPUHP_AP_ARM64_ISNDEP_STARTING, 136 CPUHP_AP_SMPCFD_DYING, 137 CPUHP_AP_X86_TBOOT_DYING, 138 CPUHP_AP_ONLINE, 139 CPUHP_TEARDOWN_CPU, 140 CPUHP_AP_ONLINE_IDLE, 141 CPUHP_AP_SMPBOOT_THREADS, 142 CPUHP_AP_X86_VDSO_VMA_ONLINE, 143 CPUHP_AP_IRQ_AFFINITY_ONLINE, 144 CPUHP_AP_PERF_ONLINE, 145 CPUHP_AP_PERF_X86_ONLINE, 146 CPUHP_AP_PERF_X86_UNCORE_ONLINE, 147 CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE, 148 CPUHP_AP_PERF_X86_AMD_POWER_ONLINE, 149 CPUHP_AP_PERF_X86_RAPL_ONLINE, 150 CPUHP_AP_PERF_X86_CQM_ONLINE, 151 CPUHP_AP_PERF_X86_CSTATE_ONLINE, 152 CPUHP_AP_PERF_S390_CF_ONLINE, 153 CPUHP_AP_PERF_S390_SF_ONLINE, 154 CPUHP_AP_PERF_ARM_CCI_ONLINE, 155 CPUHP_AP_PERF_ARM_CCN_ONLINE, 156 CPUHP_AP_PERF_ARM_L2X0_ONLINE, 157 CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE, 158 CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE, 159 CPUHP_AP_PERF_POWERPC_NEST_IMC_ONLINE, 160 CPUHP_AP_PERF_POWERPC_CORE_IMC_ONLINE, 161 CPUHP_AP_PERF_POWERPC_THREAD_IMC_ONLINE, 162 CPUHP_AP_WORKQUEUE_ONLINE, 163 CPUHP_AP_RCUTREE_ONLINE, 164 CPUHP_AP_ONLINE_DYN, 165 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30, 166 CPUHP_AP_X86_HPET_ONLINE, 167 CPUHP_AP_X86_KVM_CLK_ONLINE, 168 CPUHP_AP_ACTIVE, 169 CPUHP_ONLINE, 170 }; 171 172 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke, 173 int (*startup)(unsigned int cpu), 174 int (*teardown)(unsigned int cpu), bool multi_instance); 175 176 int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name, 177 bool invoke, 178 int (*startup)(unsigned int cpu), 179 int (*teardown)(unsigned int cpu), 180 bool multi_instance); 181 /** 182 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks 183 * @state: The state for which the calls are installed 184 * @name: Name of the callback (will be used in debug output) 185 * @startup: startup callback function 186 * @teardown: teardown callback function 187 * 188 * Installs the callback functions and invokes the startup callback on 189 * the present cpus which have already reached the @state. 190 */ 191 static inline int cpuhp_setup_state(enum cpuhp_state state, 192 const char *name, 193 int (*startup)(unsigned int cpu), 194 int (*teardown)(unsigned int cpu)) 195 { 196 return __cpuhp_setup_state(state, name, true, startup, teardown, false); 197 } 198 199 static inline int cpuhp_setup_state_cpuslocked(enum cpuhp_state state, 200 const char *name, 201 int (*startup)(unsigned int cpu), 202 int (*teardown)(unsigned int cpu)) 203 { 204 return __cpuhp_setup_state_cpuslocked(state, name, true, startup, 205 teardown, false); 206 } 207 208 /** 209 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the 210 * callbacks 211 * @state: The state for which the calls are installed 212 * @name: Name of the callback. 213 * @startup: startup callback function 214 * @teardown: teardown callback function 215 * 216 * Same as @cpuhp_setup_state except that no calls are executed are invoked 217 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n. 218 */ 219 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state, 220 const char *name, 221 int (*startup)(unsigned int cpu), 222 int (*teardown)(unsigned int cpu)) 223 { 224 return __cpuhp_setup_state(state, name, false, startup, teardown, 225 false); 226 } 227 228 static inline int cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state, 229 const char *name, 230 int (*startup)(unsigned int cpu), 231 int (*teardown)(unsigned int cpu)) 232 { 233 return __cpuhp_setup_state_cpuslocked(state, name, false, startup, 234 teardown, false); 235 } 236 237 /** 238 * cpuhp_setup_state_multi - Add callbacks for multi state 239 * @state: The state for which the calls are installed 240 * @name: Name of the callback. 241 * @startup: startup callback function 242 * @teardown: teardown callback function 243 * 244 * Sets the internal multi_instance flag and prepares a state to work as a multi 245 * instance callback. No callbacks are invoked at this point. The callbacks are 246 * invoked once an instance for this state are registered via 247 * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls. 248 */ 249 static inline int cpuhp_setup_state_multi(enum cpuhp_state state, 250 const char *name, 251 int (*startup)(unsigned int cpu, 252 struct hlist_node *node), 253 int (*teardown)(unsigned int cpu, 254 struct hlist_node *node)) 255 { 256 return __cpuhp_setup_state(state, name, false, 257 (void *) startup, 258 (void *) teardown, true); 259 } 260 261 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node, 262 bool invoke); 263 int __cpuhp_state_add_instance_cpuslocked(enum cpuhp_state state, 264 struct hlist_node *node, bool invoke); 265 266 /** 267 * cpuhp_state_add_instance - Add an instance for a state and invoke startup 268 * callback. 269 * @state: The state for which the instance is installed 270 * @node: The node for this individual state. 271 * 272 * Installs the instance for the @state and invokes the startup callback on 273 * the present cpus which have already reached the @state. The @state must have 274 * been earlier marked as multi-instance by @cpuhp_setup_state_multi. 275 */ 276 static inline int cpuhp_state_add_instance(enum cpuhp_state state, 277 struct hlist_node *node) 278 { 279 return __cpuhp_state_add_instance(state, node, true); 280 } 281 282 /** 283 * cpuhp_state_add_instance_nocalls - Add an instance for a state without 284 * invoking the startup callback. 285 * @state: The state for which the instance is installed 286 * @node: The node for this individual state. 287 * 288 * Installs the instance for the @state The @state must have been earlier 289 * marked as multi-instance by @cpuhp_setup_state_multi. 290 */ 291 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state, 292 struct hlist_node *node) 293 { 294 return __cpuhp_state_add_instance(state, node, false); 295 } 296 297 static inline int 298 cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state, 299 struct hlist_node *node) 300 { 301 return __cpuhp_state_add_instance_cpuslocked(state, node, false); 302 } 303 304 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke); 305 void __cpuhp_remove_state_cpuslocked(enum cpuhp_state state, bool invoke); 306 307 /** 308 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown 309 * @state: The state for which the calls are removed 310 * 311 * Removes the callback functions and invokes the teardown callback on 312 * the present cpus which have already reached the @state. 313 */ 314 static inline void cpuhp_remove_state(enum cpuhp_state state) 315 { 316 __cpuhp_remove_state(state, true); 317 } 318 319 /** 320 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking 321 * teardown 322 * @state: The state for which the calls are removed 323 */ 324 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state) 325 { 326 __cpuhp_remove_state(state, false); 327 } 328 329 static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state) 330 { 331 __cpuhp_remove_state_cpuslocked(state, false); 332 } 333 334 /** 335 * cpuhp_remove_multi_state - Remove hotplug multi state callback 336 * @state: The state for which the calls are removed 337 * 338 * Removes the callback functions from a multi state. This is the reverse of 339 * cpuhp_setup_state_multi(). All instances should have been removed before 340 * invoking this function. 341 */ 342 static inline void cpuhp_remove_multi_state(enum cpuhp_state state) 343 { 344 __cpuhp_remove_state(state, false); 345 } 346 347 int __cpuhp_state_remove_instance(enum cpuhp_state state, 348 struct hlist_node *node, bool invoke); 349 350 /** 351 * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke 352 * the teardown callback 353 * @state: The state from which the instance is removed 354 * @node: The node for this individual state. 355 * 356 * Removes the instance and invokes the teardown callback on the present cpus 357 * which have already reached the @state. 358 */ 359 static inline int cpuhp_state_remove_instance(enum cpuhp_state state, 360 struct hlist_node *node) 361 { 362 return __cpuhp_state_remove_instance(state, node, true); 363 } 364 365 /** 366 * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state 367 * without invoking the reatdown callback 368 * @state: The state from which the instance is removed 369 * @node: The node for this individual state. 370 * 371 * Removes the instance without invoking the teardown callback. 372 */ 373 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state, 374 struct hlist_node *node) 375 { 376 return __cpuhp_state_remove_instance(state, node, false); 377 } 378 379 #ifdef CONFIG_SMP 380 void cpuhp_online_idle(enum cpuhp_state state); 381 #else 382 static inline void cpuhp_online_idle(enum cpuhp_state state) { } 383 #endif 384 385 #endif 386