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_UNCORE_PREP, 12 CPUHP_PERF_X86_AMD_UNCORE_PREP, 13 CPUHP_PERF_X86_RAPL_PREP, 14 CPUHP_PERF_BFIN, 15 CPUHP_PERF_POWER, 16 CPUHP_PERF_SUPERH, 17 CPUHP_X86_HPET_DEAD, 18 CPUHP_X86_APB_DEAD, 19 CPUHP_X86_MCE_DEAD, 20 CPUHP_VIRT_NET_DEAD, 21 CPUHP_SLUB_DEAD, 22 CPUHP_MM_WRITEBACK_DEAD, 23 CPUHP_MM_VMSTAT_DEAD, 24 CPUHP_SOFTIRQ_DEAD, 25 CPUHP_NET_MVNETA_DEAD, 26 CPUHP_CPUIDLE_DEAD, 27 CPUHP_ARM64_FPSIMD_DEAD, 28 CPUHP_ARM_OMAP_WAKE_DEAD, 29 CPUHP_IRQ_POLL_DEAD, 30 CPUHP_BLOCK_SOFTIRQ_DEAD, 31 CPUHP_VIRT_SCSI_DEAD, 32 CPUHP_ACPI_CPUDRV_DEAD, 33 CPUHP_S390_PFAULT_DEAD, 34 CPUHP_BLK_MQ_DEAD, 35 CPUHP_FS_BUFF_DEAD, 36 CPUHP_PRINTK_DEAD, 37 CPUHP_MM_MEMCQ_DEAD, 38 CPUHP_PERCPU_CNT_DEAD, 39 CPUHP_RADIX_DEAD, 40 CPUHP_PAGE_ALLOC_DEAD, 41 CPUHP_NET_DEV_DEAD, 42 CPUHP_PCI_XGENE_DEAD, 43 CPUHP_IOMMU_INTEL_DEAD, 44 CPUHP_LUSTRE_CFS_DEAD, 45 CPUHP_SCSI_BNX2FC_DEAD, 46 CPUHP_SCSI_BNX2I_DEAD, 47 CPUHP_WORKQUEUE_PREP, 48 CPUHP_POWER_NUMA_PREPARE, 49 CPUHP_HRTIMERS_PREPARE, 50 CPUHP_PROFILE_PREPARE, 51 CPUHP_X2APIC_PREPARE, 52 CPUHP_SMPCFD_PREPARE, 53 CPUHP_RELAY_PREPARE, 54 CPUHP_SLAB_PREPARE, 55 CPUHP_MD_RAID5_PREPARE, 56 CPUHP_RCUTREE_PREP, 57 CPUHP_CPUIDLE_COUPLED_PREPARE, 58 CPUHP_POWERPC_PMAC_PREPARE, 59 CPUHP_POWERPC_MMU_CTX_PREPARE, 60 CPUHP_XEN_PREPARE, 61 CPUHP_XEN_EVTCHN_PREPARE, 62 CPUHP_ARM_SHMOBILE_SCU_PREPARE, 63 CPUHP_SH_SH3X_PREPARE, 64 CPUHP_BLK_MQ_PREPARE, 65 CPUHP_NET_FLOW_PREPARE, 66 CPUHP_TOPOLOGY_PREPARE, 67 CPUHP_NET_IUCV_PREPARE, 68 CPUHP_ARM_BL_PREPARE, 69 CPUHP_TRACE_RB_PREPARE, 70 CPUHP_MM_ZS_PREPARE, 71 CPUHP_MM_ZSWP_MEM_PREPARE, 72 CPUHP_MM_ZSWP_POOL_PREPARE, 73 CPUHP_KVM_PPC_BOOK3S_PREPARE, 74 CPUHP_ZCOMP_PREPARE, 75 CPUHP_TIMERS_DEAD, 76 CPUHP_MIPS_SOC_PREPARE, 77 CPUHP_BP_PREPARE_DYN, 78 CPUHP_BP_PREPARE_DYN_END = CPUHP_BP_PREPARE_DYN + 20, 79 CPUHP_BRINGUP_CPU, 80 CPUHP_AP_IDLE_DEAD, 81 CPUHP_AP_OFFLINE, 82 CPUHP_AP_SCHED_STARTING, 83 CPUHP_AP_RCUTREE_DYING, 84 CPUHP_AP_IRQ_GIC_STARTING, 85 CPUHP_AP_IRQ_HIP04_STARTING, 86 CPUHP_AP_IRQ_ARMADA_XP_STARTING, 87 CPUHP_AP_IRQ_BCM2836_STARTING, 88 CPUHP_AP_ARM_MVEBU_COHERENCY, 89 CPUHP_AP_PERF_X86_UNCORE_STARTING, 90 CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING, 91 CPUHP_AP_PERF_X86_STARTING, 92 CPUHP_AP_PERF_X86_AMD_IBS_STARTING, 93 CPUHP_AP_PERF_X86_CQM_STARTING, 94 CPUHP_AP_PERF_X86_CSTATE_STARTING, 95 CPUHP_AP_PERF_XTENSA_STARTING, 96 CPUHP_AP_PERF_METAG_STARTING, 97 CPUHP_AP_MIPS_OP_LOONGSON3_STARTING, 98 CPUHP_AP_ARM_VFP_STARTING, 99 CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING, 100 CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING, 101 CPUHP_AP_PERF_ARM_STARTING, 102 CPUHP_AP_ARM_L2X0_STARTING, 103 CPUHP_AP_ARM_ARCH_TIMER_STARTING, 104 CPUHP_AP_ARM_GLOBAL_TIMER_STARTING, 105 CPUHP_AP_JCORE_TIMER_STARTING, 106 CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING, 107 CPUHP_AP_ARM_TWD_STARTING, 108 CPUHP_AP_METAG_TIMER_STARTING, 109 CPUHP_AP_QCOM_TIMER_STARTING, 110 CPUHP_AP_ARMADA_TIMER_STARTING, 111 CPUHP_AP_MARCO_TIMER_STARTING, 112 CPUHP_AP_MIPS_GIC_TIMER_STARTING, 113 CPUHP_AP_ARC_TIMER_STARTING, 114 CPUHP_AP_KVM_STARTING, 115 CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING, 116 CPUHP_AP_KVM_ARM_VGIC_STARTING, 117 CPUHP_AP_KVM_ARM_TIMER_STARTING, 118 /* Must be the last timer callback */ 119 CPUHP_AP_DUMMY_TIMER_STARTING, 120 CPUHP_AP_ARM_XEN_STARTING, 121 CPUHP_AP_ARM_CORESIGHT_STARTING, 122 CPUHP_AP_ARM64_ISNDEP_STARTING, 123 CPUHP_AP_SMPCFD_DYING, 124 CPUHP_AP_X86_TBOOT_DYING, 125 CPUHP_AP_ONLINE, 126 CPUHP_TEARDOWN_CPU, 127 CPUHP_AP_ONLINE_IDLE, 128 CPUHP_AP_SMPBOOT_THREADS, 129 CPUHP_AP_X86_VDSO_VMA_ONLINE, 130 CPUHP_AP_PERF_ONLINE, 131 CPUHP_AP_PERF_X86_ONLINE, 132 CPUHP_AP_PERF_X86_UNCORE_ONLINE, 133 CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE, 134 CPUHP_AP_PERF_X86_AMD_POWER_ONLINE, 135 CPUHP_AP_PERF_X86_RAPL_ONLINE, 136 CPUHP_AP_PERF_X86_CQM_ONLINE, 137 CPUHP_AP_PERF_X86_CSTATE_ONLINE, 138 CPUHP_AP_PERF_S390_CF_ONLINE, 139 CPUHP_AP_PERF_S390_SF_ONLINE, 140 CPUHP_AP_PERF_ARM_CCI_ONLINE, 141 CPUHP_AP_PERF_ARM_CCN_ONLINE, 142 CPUHP_AP_PERF_ARM_L2X0_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 /** 158 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks 159 * @state: The state for which the calls are installed 160 * @name: Name of the callback (will be used in debug output) 161 * @startup: startup callback function 162 * @teardown: teardown callback function 163 * 164 * Installs the callback functions and invokes the startup callback on 165 * the present cpus which have already reached the @state. 166 */ 167 static inline int cpuhp_setup_state(enum cpuhp_state state, 168 const char *name, 169 int (*startup)(unsigned int cpu), 170 int (*teardown)(unsigned int cpu)) 171 { 172 return __cpuhp_setup_state(state, name, true, startup, teardown, false); 173 } 174 175 /** 176 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the 177 * callbacks 178 * @state: The state for which the calls are installed 179 * @name: Name of the callback. 180 * @startup: startup callback function 181 * @teardown: teardown callback function 182 * 183 * Same as @cpuhp_setup_state except that no calls are executed are invoked 184 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n. 185 */ 186 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state, 187 const char *name, 188 int (*startup)(unsigned int cpu), 189 int (*teardown)(unsigned int cpu)) 190 { 191 return __cpuhp_setup_state(state, name, false, startup, teardown, 192 false); 193 } 194 195 /** 196 * cpuhp_setup_state_multi - Add callbacks for multi state 197 * @state: The state for which the calls are installed 198 * @name: Name of the callback. 199 * @startup: startup callback function 200 * @teardown: teardown callback function 201 * 202 * Sets the internal multi_instance flag and prepares a state to work as a multi 203 * instance callback. No callbacks are invoked at this point. The callbacks are 204 * invoked once an instance for this state are registered via 205 * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls. 206 */ 207 static inline int cpuhp_setup_state_multi(enum cpuhp_state state, 208 const char *name, 209 int (*startup)(unsigned int cpu, 210 struct hlist_node *node), 211 int (*teardown)(unsigned int cpu, 212 struct hlist_node *node)) 213 { 214 return __cpuhp_setup_state(state, name, false, 215 (void *) startup, 216 (void *) teardown, true); 217 } 218 219 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node, 220 bool invoke); 221 222 /** 223 * cpuhp_state_add_instance - Add an instance for a state and invoke startup 224 * callback. 225 * @state: The state for which the instance is installed 226 * @node: The node for this individual state. 227 * 228 * Installs the instance for the @state and invokes the startup callback on 229 * the present cpus which have already reached the @state. The @state must have 230 * been earlier marked as multi-instance by @cpuhp_setup_state_multi. 231 */ 232 static inline int cpuhp_state_add_instance(enum cpuhp_state state, 233 struct hlist_node *node) 234 { 235 return __cpuhp_state_add_instance(state, node, true); 236 } 237 238 /** 239 * cpuhp_state_add_instance_nocalls - Add an instance for a state without 240 * invoking the startup callback. 241 * @state: The state for which the instance is installed 242 * @node: The node for this individual state. 243 * 244 * Installs the instance for the @state The @state must have been earlier 245 * marked as multi-instance by @cpuhp_setup_state_multi. 246 */ 247 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state, 248 struct hlist_node *node) 249 { 250 return __cpuhp_state_add_instance(state, node, false); 251 } 252 253 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke); 254 255 /** 256 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown 257 * @state: The state for which the calls are removed 258 * 259 * Removes the callback functions and invokes the teardown callback on 260 * the present cpus which have already reached the @state. 261 */ 262 static inline void cpuhp_remove_state(enum cpuhp_state state) 263 { 264 __cpuhp_remove_state(state, true); 265 } 266 267 /** 268 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking 269 * teardown 270 * @state: The state for which the calls are removed 271 */ 272 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state) 273 { 274 __cpuhp_remove_state(state, false); 275 } 276 277 /** 278 * cpuhp_remove_multi_state - Remove hotplug multi state callback 279 * @state: The state for which the calls are removed 280 * 281 * Removes the callback functions from a multi state. This is the reverse of 282 * cpuhp_setup_state_multi(). All instances should have been removed before 283 * invoking this function. 284 */ 285 static inline void cpuhp_remove_multi_state(enum cpuhp_state state) 286 { 287 __cpuhp_remove_state(state, false); 288 } 289 290 int __cpuhp_state_remove_instance(enum cpuhp_state state, 291 struct hlist_node *node, bool invoke); 292 293 /** 294 * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke 295 * the teardown callback 296 * @state: The state from which the instance is removed 297 * @node: The node for this individual state. 298 * 299 * Removes the instance and invokes the teardown callback on the present cpus 300 * which have already reached the @state. 301 */ 302 static inline int cpuhp_state_remove_instance(enum cpuhp_state state, 303 struct hlist_node *node) 304 { 305 return __cpuhp_state_remove_instance(state, node, true); 306 } 307 308 /** 309 * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state 310 * without invoking the reatdown callback 311 * @state: The state from which the instance is removed 312 * @node: The node for this individual state. 313 * 314 * Removes the instance without invoking the teardown callback. 315 */ 316 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state, 317 struct hlist_node *node) 318 { 319 return __cpuhp_state_remove_instance(state, node, false); 320 } 321 322 #ifdef CONFIG_SMP 323 void cpuhp_online_idle(enum cpuhp_state state); 324 #else 325 static inline void cpuhp_online_idle(enum cpuhp_state state) { } 326 #endif 327 328 #endif 329