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_SCSI_BNX2FC_DEAD, 43 CPUHP_SCSI_BNX2I_DEAD, 44 CPUHP_WORKQUEUE_PREP, 45 CPUHP_POWER_NUMA_PREPARE, 46 CPUHP_HRTIMERS_PREPARE, 47 CPUHP_PROFILE_PREPARE, 48 CPUHP_X2APIC_PREPARE, 49 CPUHP_SMPCFD_PREPARE, 50 CPUHP_RELAY_PREPARE, 51 CPUHP_SLAB_PREPARE, 52 CPUHP_MD_RAID5_PREPARE, 53 CPUHP_RCUTREE_PREP, 54 CPUHP_CPUIDLE_COUPLED_PREPARE, 55 CPUHP_POWERPC_PMAC_PREPARE, 56 CPUHP_POWERPC_MMU_CTX_PREPARE, 57 CPUHP_XEN_PREPARE, 58 CPUHP_XEN_EVTCHN_PREPARE, 59 CPUHP_ARM_SHMOBILE_SCU_PREPARE, 60 CPUHP_SH_SH3X_PREPARE, 61 CPUHP_BLK_MQ_PREPARE, 62 CPUHP_NET_FLOW_PREPARE, 63 CPUHP_TOPOLOGY_PREPARE, 64 CPUHP_NET_IUCV_PREPARE, 65 CPUHP_ARM_BL_PREPARE, 66 CPUHP_TRACE_RB_PREPARE, 67 CPUHP_MM_ZS_PREPARE, 68 CPUHP_MM_ZSWP_MEM_PREPARE, 69 CPUHP_MM_ZSWP_POOL_PREPARE, 70 CPUHP_KVM_PPC_BOOK3S_PREPARE, 71 CPUHP_ZCOMP_PREPARE, 72 CPUHP_TIMERS_DEAD, 73 CPUHP_MIPS_SOC_PREPARE, 74 CPUHP_BP_PREPARE_DYN, 75 CPUHP_BP_PREPARE_DYN_END = CPUHP_BP_PREPARE_DYN + 20, 76 CPUHP_BRINGUP_CPU, 77 CPUHP_AP_IDLE_DEAD, 78 CPUHP_AP_OFFLINE, 79 CPUHP_AP_SCHED_STARTING, 80 CPUHP_AP_RCUTREE_DYING, 81 CPUHP_AP_IRQ_GIC_STARTING, 82 CPUHP_AP_IRQ_HIP04_STARTING, 83 CPUHP_AP_IRQ_ARMADA_XP_STARTING, 84 CPUHP_AP_IRQ_BCM2836_STARTING, 85 CPUHP_AP_ARM_MVEBU_COHERENCY, 86 CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING, 87 CPUHP_AP_PERF_X86_STARTING, 88 CPUHP_AP_PERF_X86_AMD_IBS_STARTING, 89 CPUHP_AP_PERF_X86_CQM_STARTING, 90 CPUHP_AP_PERF_X86_CSTATE_STARTING, 91 CPUHP_AP_PERF_XTENSA_STARTING, 92 CPUHP_AP_PERF_METAG_STARTING, 93 CPUHP_AP_MIPS_OP_LOONGSON3_STARTING, 94 CPUHP_AP_ARM_VFP_STARTING, 95 CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING, 96 CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING, 97 CPUHP_AP_PERF_ARM_ACPI_STARTING, 98 CPUHP_AP_PERF_ARM_STARTING, 99 CPUHP_AP_ARM_L2X0_STARTING, 100 CPUHP_AP_ARM_ARCH_TIMER_STARTING, 101 CPUHP_AP_ARM_GLOBAL_TIMER_STARTING, 102 CPUHP_AP_JCORE_TIMER_STARTING, 103 CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING, 104 CPUHP_AP_ARM_TWD_STARTING, 105 CPUHP_AP_METAG_TIMER_STARTING, 106 CPUHP_AP_QCOM_TIMER_STARTING, 107 CPUHP_AP_ARMADA_TIMER_STARTING, 108 CPUHP_AP_MARCO_TIMER_STARTING, 109 CPUHP_AP_MIPS_GIC_TIMER_STARTING, 110 CPUHP_AP_ARC_TIMER_STARTING, 111 CPUHP_AP_KVM_STARTING, 112 CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING, 113 CPUHP_AP_KVM_ARM_VGIC_STARTING, 114 CPUHP_AP_KVM_ARM_TIMER_STARTING, 115 /* Must be the last timer callback */ 116 CPUHP_AP_DUMMY_TIMER_STARTING, 117 CPUHP_AP_ARM_XEN_STARTING, 118 CPUHP_AP_ARM_CORESIGHT_STARTING, 119 CPUHP_AP_ARM64_ISNDEP_STARTING, 120 CPUHP_AP_SMPCFD_DYING, 121 CPUHP_AP_X86_TBOOT_DYING, 122 CPUHP_AP_ONLINE, 123 CPUHP_TEARDOWN_CPU, 124 CPUHP_AP_ONLINE_IDLE, 125 CPUHP_AP_SMPBOOT_THREADS, 126 CPUHP_AP_X86_VDSO_VMA_ONLINE, 127 CPUHP_AP_PERF_ONLINE, 128 CPUHP_AP_PERF_X86_ONLINE, 129 CPUHP_AP_PERF_X86_UNCORE_ONLINE, 130 CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE, 131 CPUHP_AP_PERF_X86_AMD_POWER_ONLINE, 132 CPUHP_AP_PERF_X86_RAPL_ONLINE, 133 CPUHP_AP_PERF_X86_CQM_ONLINE, 134 CPUHP_AP_PERF_X86_CSTATE_ONLINE, 135 CPUHP_AP_PERF_S390_CF_ONLINE, 136 CPUHP_AP_PERF_S390_SF_ONLINE, 137 CPUHP_AP_PERF_ARM_CCI_ONLINE, 138 CPUHP_AP_PERF_ARM_CCN_ONLINE, 139 CPUHP_AP_PERF_ARM_L2X0_ONLINE, 140 CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE, 141 CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE, 142 CPUHP_AP_WORKQUEUE_ONLINE, 143 CPUHP_AP_RCUTREE_ONLINE, 144 CPUHP_AP_ONLINE_DYN, 145 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30, 146 CPUHP_AP_X86_HPET_ONLINE, 147 CPUHP_AP_X86_KVM_CLK_ONLINE, 148 CPUHP_AP_ACTIVE, 149 CPUHP_ONLINE, 150 }; 151 152 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke, 153 int (*startup)(unsigned int cpu), 154 int (*teardown)(unsigned int cpu), bool multi_instance); 155 156 /** 157 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks 158 * @state: The state for which the calls are installed 159 * @name: Name of the callback (will be used in debug output) 160 * @startup: startup callback function 161 * @teardown: teardown callback function 162 * 163 * Installs the callback functions and invokes the startup callback on 164 * the present cpus which have already reached the @state. 165 */ 166 static inline int cpuhp_setup_state(enum cpuhp_state state, 167 const char *name, 168 int (*startup)(unsigned int cpu), 169 int (*teardown)(unsigned int cpu)) 170 { 171 return __cpuhp_setup_state(state, name, true, startup, teardown, false); 172 } 173 174 /** 175 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the 176 * callbacks 177 * @state: The state for which the calls are installed 178 * @name: Name of the callback. 179 * @startup: startup callback function 180 * @teardown: teardown callback function 181 * 182 * Same as @cpuhp_setup_state except that no calls are executed are invoked 183 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n. 184 */ 185 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state, 186 const char *name, 187 int (*startup)(unsigned int cpu), 188 int (*teardown)(unsigned int cpu)) 189 { 190 return __cpuhp_setup_state(state, name, false, startup, teardown, 191 false); 192 } 193 194 /** 195 * cpuhp_setup_state_multi - Add callbacks for multi state 196 * @state: The state for which the calls are installed 197 * @name: Name of the callback. 198 * @startup: startup callback function 199 * @teardown: teardown callback function 200 * 201 * Sets the internal multi_instance flag and prepares a state to work as a multi 202 * instance callback. No callbacks are invoked at this point. The callbacks are 203 * invoked once an instance for this state are registered via 204 * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls. 205 */ 206 static inline int cpuhp_setup_state_multi(enum cpuhp_state state, 207 const char *name, 208 int (*startup)(unsigned int cpu, 209 struct hlist_node *node), 210 int (*teardown)(unsigned int cpu, 211 struct hlist_node *node)) 212 { 213 return __cpuhp_setup_state(state, name, false, 214 (void *) startup, 215 (void *) teardown, true); 216 } 217 218 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node, 219 bool invoke); 220 221 /** 222 * cpuhp_state_add_instance - Add an instance for a state and invoke startup 223 * callback. 224 * @state: The state for which the instance is installed 225 * @node: The node for this individual state. 226 * 227 * Installs the instance for the @state and invokes the startup callback on 228 * the present cpus which have already reached the @state. The @state must have 229 * been earlier marked as multi-instance by @cpuhp_setup_state_multi. 230 */ 231 static inline int cpuhp_state_add_instance(enum cpuhp_state state, 232 struct hlist_node *node) 233 { 234 return __cpuhp_state_add_instance(state, node, true); 235 } 236 237 /** 238 * cpuhp_state_add_instance_nocalls - Add an instance for a state without 239 * invoking the startup callback. 240 * @state: The state for which the instance is installed 241 * @node: The node for this individual state. 242 * 243 * Installs the instance for the @state The @state must have been earlier 244 * marked as multi-instance by @cpuhp_setup_state_multi. 245 */ 246 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state, 247 struct hlist_node *node) 248 { 249 return __cpuhp_state_add_instance(state, node, false); 250 } 251 252 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke); 253 254 /** 255 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown 256 * @state: The state for which the calls are removed 257 * 258 * Removes the callback functions and invokes the teardown callback on 259 * the present cpus which have already reached the @state. 260 */ 261 static inline void cpuhp_remove_state(enum cpuhp_state state) 262 { 263 __cpuhp_remove_state(state, true); 264 } 265 266 /** 267 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking 268 * teardown 269 * @state: The state for which the calls are removed 270 */ 271 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state) 272 { 273 __cpuhp_remove_state(state, false); 274 } 275 276 /** 277 * cpuhp_remove_multi_state - Remove hotplug multi state callback 278 * @state: The state for which the calls are removed 279 * 280 * Removes the callback functions from a multi state. This is the reverse of 281 * cpuhp_setup_state_multi(). All instances should have been removed before 282 * invoking this function. 283 */ 284 static inline void cpuhp_remove_multi_state(enum cpuhp_state state) 285 { 286 __cpuhp_remove_state(state, false); 287 } 288 289 int __cpuhp_state_remove_instance(enum cpuhp_state state, 290 struct hlist_node *node, bool invoke); 291 292 /** 293 * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke 294 * the teardown callback 295 * @state: The state from which the instance is removed 296 * @node: The node for this individual state. 297 * 298 * Removes the instance and invokes the teardown callback on the present cpus 299 * which have already reached the @state. 300 */ 301 static inline int cpuhp_state_remove_instance(enum cpuhp_state state, 302 struct hlist_node *node) 303 { 304 return __cpuhp_state_remove_instance(state, node, true); 305 } 306 307 /** 308 * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state 309 * without invoking the reatdown callback 310 * @state: The state from which the instance is removed 311 * @node: The node for this individual state. 312 * 313 * Removes the instance without invoking the teardown callback. 314 */ 315 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state, 316 struct hlist_node *node) 317 { 318 return __cpuhp_state_remove_instance(state, node, false); 319 } 320 321 #ifdef CONFIG_SMP 322 void cpuhp_online_idle(enum cpuhp_state state); 323 #else 324 static inline void cpuhp_online_idle(enum cpuhp_state state) { } 325 #endif 326 327 #endif 328