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_PERF_POWERPC_NEST_IMC_ONLINE, 141 CPUHP_AP_PERF_POWERPC_CORE_IMC_ONLINE, 142 CPUHP_AP_PERF_POWERPC_THREAD_IMC_ONLINE, 143 CPUHP_AP_WORKQUEUE_ONLINE, 144 CPUHP_AP_RCUTREE_ONLINE, 145 CPUHP_AP_ONLINE_DYN, 146 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30, 147 CPUHP_AP_X86_HPET_ONLINE, 148 CPUHP_AP_X86_KVM_CLK_ONLINE, 149 CPUHP_AP_ACTIVE, 150 CPUHP_ONLINE, 151 }; 152 153 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke, 154 int (*startup)(unsigned int cpu), 155 int (*teardown)(unsigned int cpu), bool multi_instance); 156 157 int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name, 158 bool invoke, 159 int (*startup)(unsigned int cpu), 160 int (*teardown)(unsigned int cpu), 161 bool multi_instance); 162 /** 163 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks 164 * @state: The state for which the calls are installed 165 * @name: Name of the callback (will be used in debug output) 166 * @startup: startup callback function 167 * @teardown: teardown callback function 168 * 169 * Installs the callback functions and invokes the startup callback on 170 * the present cpus which have already reached the @state. 171 */ 172 static inline int cpuhp_setup_state(enum cpuhp_state state, 173 const char *name, 174 int (*startup)(unsigned int cpu), 175 int (*teardown)(unsigned int cpu)) 176 { 177 return __cpuhp_setup_state(state, name, true, startup, teardown, false); 178 } 179 180 static inline int cpuhp_setup_state_cpuslocked(enum cpuhp_state state, 181 const char *name, 182 int (*startup)(unsigned int cpu), 183 int (*teardown)(unsigned int cpu)) 184 { 185 return __cpuhp_setup_state_cpuslocked(state, name, true, startup, 186 teardown, false); 187 } 188 189 /** 190 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the 191 * callbacks 192 * @state: The state for which the calls are installed 193 * @name: Name of the callback. 194 * @startup: startup callback function 195 * @teardown: teardown callback function 196 * 197 * Same as @cpuhp_setup_state except that no calls are executed are invoked 198 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n. 199 */ 200 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state, 201 const char *name, 202 int (*startup)(unsigned int cpu), 203 int (*teardown)(unsigned int cpu)) 204 { 205 return __cpuhp_setup_state(state, name, false, startup, teardown, 206 false); 207 } 208 209 static inline int cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state, 210 const char *name, 211 int (*startup)(unsigned int cpu), 212 int (*teardown)(unsigned int cpu)) 213 { 214 return __cpuhp_setup_state_cpuslocked(state, name, false, startup, 215 teardown, false); 216 } 217 218 /** 219 * cpuhp_setup_state_multi - Add callbacks for multi state 220 * @state: The state for which the calls are installed 221 * @name: Name of the callback. 222 * @startup: startup callback function 223 * @teardown: teardown callback function 224 * 225 * Sets the internal multi_instance flag and prepares a state to work as a multi 226 * instance callback. No callbacks are invoked at this point. The callbacks are 227 * invoked once an instance for this state are registered via 228 * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls. 229 */ 230 static inline int cpuhp_setup_state_multi(enum cpuhp_state state, 231 const char *name, 232 int (*startup)(unsigned int cpu, 233 struct hlist_node *node), 234 int (*teardown)(unsigned int cpu, 235 struct hlist_node *node)) 236 { 237 return __cpuhp_setup_state(state, name, false, 238 (void *) startup, 239 (void *) teardown, true); 240 } 241 242 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node, 243 bool invoke); 244 int __cpuhp_state_add_instance_cpuslocked(enum cpuhp_state state, 245 struct hlist_node *node, bool invoke); 246 247 /** 248 * cpuhp_state_add_instance - Add an instance for a state and invoke startup 249 * callback. 250 * @state: The state for which the instance is installed 251 * @node: The node for this individual state. 252 * 253 * Installs the instance for the @state and invokes the startup callback on 254 * the present cpus which have already reached the @state. The @state must have 255 * been earlier marked as multi-instance by @cpuhp_setup_state_multi. 256 */ 257 static inline int cpuhp_state_add_instance(enum cpuhp_state state, 258 struct hlist_node *node) 259 { 260 return __cpuhp_state_add_instance(state, node, true); 261 } 262 263 /** 264 * cpuhp_state_add_instance_nocalls - Add an instance for a state without 265 * invoking the startup callback. 266 * @state: The state for which the instance is installed 267 * @node: The node for this individual state. 268 * 269 * Installs the instance for the @state The @state must have been earlier 270 * marked as multi-instance by @cpuhp_setup_state_multi. 271 */ 272 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state, 273 struct hlist_node *node) 274 { 275 return __cpuhp_state_add_instance(state, node, false); 276 } 277 278 static inline int 279 cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state, 280 struct hlist_node *node) 281 { 282 return __cpuhp_state_add_instance_cpuslocked(state, node, false); 283 } 284 285 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke); 286 void __cpuhp_remove_state_cpuslocked(enum cpuhp_state state, bool invoke); 287 288 /** 289 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown 290 * @state: The state for which the calls are removed 291 * 292 * Removes the callback functions and invokes the teardown callback on 293 * the present cpus which have already reached the @state. 294 */ 295 static inline void cpuhp_remove_state(enum cpuhp_state state) 296 { 297 __cpuhp_remove_state(state, true); 298 } 299 300 /** 301 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking 302 * teardown 303 * @state: The state for which the calls are removed 304 */ 305 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state) 306 { 307 __cpuhp_remove_state(state, false); 308 } 309 310 static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state) 311 { 312 __cpuhp_remove_state_cpuslocked(state, false); 313 } 314 315 /** 316 * cpuhp_remove_multi_state - Remove hotplug multi state callback 317 * @state: The state for which the calls are removed 318 * 319 * Removes the callback functions from a multi state. This is the reverse of 320 * cpuhp_setup_state_multi(). All instances should have been removed before 321 * invoking this function. 322 */ 323 static inline void cpuhp_remove_multi_state(enum cpuhp_state state) 324 { 325 __cpuhp_remove_state(state, false); 326 } 327 328 int __cpuhp_state_remove_instance(enum cpuhp_state state, 329 struct hlist_node *node, bool invoke); 330 331 /** 332 * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke 333 * the teardown callback 334 * @state: The state from which the instance is removed 335 * @node: The node for this individual state. 336 * 337 * Removes the instance and invokes the teardown callback on the present cpus 338 * which have already reached the @state. 339 */ 340 static inline int cpuhp_state_remove_instance(enum cpuhp_state state, 341 struct hlist_node *node) 342 { 343 return __cpuhp_state_remove_instance(state, node, true); 344 } 345 346 /** 347 * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state 348 * without invoking the reatdown callback 349 * @state: The state from which the instance is removed 350 * @node: The node for this individual state. 351 * 352 * Removes the instance without invoking the teardown callback. 353 */ 354 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state, 355 struct hlist_node *node) 356 { 357 return __cpuhp_state_remove_instance(state, node, false); 358 } 359 360 #ifdef CONFIG_SMP 361 void cpuhp_online_idle(enum cpuhp_state state); 362 #else 363 static inline void cpuhp_online_idle(enum cpuhp_state state) { } 364 #endif 365 366 #endif 367