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_BRINGUP_CPU, 78 CPUHP_AP_IDLE_DEAD, 79 CPUHP_AP_OFFLINE, 80 CPUHP_AP_SCHED_STARTING, 81 CPUHP_AP_RCUTREE_DYING, 82 CPUHP_AP_IRQ_GIC_STARTING, 83 CPUHP_AP_IRQ_HIP04_STARTING, 84 CPUHP_AP_IRQ_ARMADA_XP_STARTING, 85 CPUHP_AP_IRQ_BCM2836_STARTING, 86 CPUHP_AP_ARM_MVEBU_COHERENCY, 87 CPUHP_AP_PERF_X86_UNCORE_STARTING, 88 CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING, 89 CPUHP_AP_PERF_X86_STARTING, 90 CPUHP_AP_PERF_X86_AMD_IBS_STARTING, 91 CPUHP_AP_PERF_X86_CQM_STARTING, 92 CPUHP_AP_PERF_X86_CSTATE_STARTING, 93 CPUHP_AP_PERF_XTENSA_STARTING, 94 CPUHP_AP_PERF_METAG_STARTING, 95 CPUHP_AP_MIPS_OP_LOONGSON3_STARTING, 96 CPUHP_AP_ARM_VFP_STARTING, 97 CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING, 98 CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING, 99 CPUHP_AP_PERF_ARM_STARTING, 100 CPUHP_AP_ARM_L2X0_STARTING, 101 CPUHP_AP_ARM_ARCH_TIMER_STARTING, 102 CPUHP_AP_ARM_GLOBAL_TIMER_STARTING, 103 CPUHP_AP_JCORE_TIMER_STARTING, 104 CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING, 105 CPUHP_AP_ARM_TWD_STARTING, 106 CPUHP_AP_METAG_TIMER_STARTING, 107 CPUHP_AP_QCOM_TIMER_STARTING, 108 CPUHP_AP_ARMADA_TIMER_STARTING, 109 CPUHP_AP_MARCO_TIMER_STARTING, 110 CPUHP_AP_MIPS_GIC_TIMER_STARTING, 111 CPUHP_AP_ARC_TIMER_STARTING, 112 CPUHP_AP_KVM_STARTING, 113 CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING, 114 CPUHP_AP_KVM_ARM_VGIC_STARTING, 115 CPUHP_AP_KVM_ARM_TIMER_STARTING, 116 /* Must be the last timer callback */ 117 CPUHP_AP_DUMMY_TIMER_STARTING, 118 CPUHP_AP_ARM_XEN_STARTING, 119 CPUHP_AP_ARM_CORESIGHT_STARTING, 120 CPUHP_AP_ARM64_ISNDEP_STARTING, 121 CPUHP_AP_SMPCFD_DYING, 122 CPUHP_AP_X86_TBOOT_DYING, 123 CPUHP_AP_ONLINE, 124 CPUHP_TEARDOWN_CPU, 125 CPUHP_AP_ONLINE_IDLE, 126 CPUHP_AP_SMPBOOT_THREADS, 127 CPUHP_AP_X86_VDSO_VMA_ONLINE, 128 CPUHP_AP_PERF_ONLINE, 129 CPUHP_AP_PERF_X86_ONLINE, 130 CPUHP_AP_PERF_X86_UNCORE_ONLINE, 131 CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE, 132 CPUHP_AP_PERF_X86_AMD_POWER_ONLINE, 133 CPUHP_AP_PERF_X86_RAPL_ONLINE, 134 CPUHP_AP_PERF_X86_CQM_ONLINE, 135 CPUHP_AP_PERF_X86_CSTATE_ONLINE, 136 CPUHP_AP_PERF_S390_CF_ONLINE, 137 CPUHP_AP_PERF_S390_SF_ONLINE, 138 CPUHP_AP_PERF_ARM_CCI_ONLINE, 139 CPUHP_AP_PERF_ARM_CCN_ONLINE, 140 CPUHP_AP_PERF_ARM_L2X0_ONLINE, 141 CPUHP_AP_WORKQUEUE_ONLINE, 142 CPUHP_AP_RCUTREE_ONLINE, 143 CPUHP_AP_ONLINE_DYN, 144 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30, 145 CPUHP_AP_X86_HPET_ONLINE, 146 CPUHP_AP_X86_KVM_CLK_ONLINE, 147 CPUHP_AP_ACTIVE, 148 CPUHP_ONLINE, 149 }; 150 151 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke, 152 int (*startup)(unsigned int cpu), 153 int (*teardown)(unsigned int cpu), bool multi_instance); 154 155 /** 156 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks 157 * @state: The state for which the calls are installed 158 * @name: Name of the callback (will be used in debug output) 159 * @startup: startup callback function 160 * @teardown: teardown callback function 161 * 162 * Installs the callback functions and invokes the startup callback on 163 * the present cpus which have already reached the @state. 164 */ 165 static inline int cpuhp_setup_state(enum cpuhp_state state, 166 const char *name, 167 int (*startup)(unsigned int cpu), 168 int (*teardown)(unsigned int cpu)) 169 { 170 return __cpuhp_setup_state(state, name, true, startup, teardown, false); 171 } 172 173 /** 174 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the 175 * callbacks 176 * @state: The state for which the calls are installed 177 * @name: Name of the callback. 178 * @startup: startup callback function 179 * @teardown: teardown callback function 180 * 181 * Same as @cpuhp_setup_state except that no calls are executed are invoked 182 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n. 183 */ 184 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state, 185 const char *name, 186 int (*startup)(unsigned int cpu), 187 int (*teardown)(unsigned int cpu)) 188 { 189 return __cpuhp_setup_state(state, name, false, startup, teardown, 190 false); 191 } 192 193 /** 194 * cpuhp_setup_state_multi - Add callbacks for multi state 195 * @state: The state for which the calls are installed 196 * @name: Name of the callback. 197 * @startup: startup callback function 198 * @teardown: teardown callback function 199 * 200 * Sets the internal multi_instance flag and prepares a state to work as a multi 201 * instance callback. No callbacks are invoked at this point. The callbacks are 202 * invoked once an instance for this state are registered via 203 * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls. 204 */ 205 static inline int cpuhp_setup_state_multi(enum cpuhp_state state, 206 const char *name, 207 int (*startup)(unsigned int cpu, 208 struct hlist_node *node), 209 int (*teardown)(unsigned int cpu, 210 struct hlist_node *node)) 211 { 212 return __cpuhp_setup_state(state, name, false, 213 (void *) startup, 214 (void *) teardown, true); 215 } 216 217 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node, 218 bool invoke); 219 220 /** 221 * cpuhp_state_add_instance - Add an instance for a state and invoke startup 222 * callback. 223 * @state: The state for which the instance is installed 224 * @node: The node for this individual state. 225 * 226 * Installs the instance for the @state and invokes the startup callback on 227 * the present cpus which have already reached the @state. The @state must have 228 * been earlier marked as multi-instance by @cpuhp_setup_state_multi. 229 */ 230 static inline int cpuhp_state_add_instance(enum cpuhp_state state, 231 struct hlist_node *node) 232 { 233 return __cpuhp_state_add_instance(state, node, true); 234 } 235 236 /** 237 * cpuhp_state_add_instance_nocalls - Add an instance for a state without 238 * invoking the startup callback. 239 * @state: The state for which the instance is installed 240 * @node: The node for this individual state. 241 * 242 * Installs the instance for the @state The @state must have been earlier 243 * marked as multi-instance by @cpuhp_setup_state_multi. 244 */ 245 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state, 246 struct hlist_node *node) 247 { 248 return __cpuhp_state_add_instance(state, node, false); 249 } 250 251 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke); 252 253 /** 254 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown 255 * @state: The state for which the calls are removed 256 * 257 * Removes the callback functions and invokes the teardown callback on 258 * the present cpus which have already reached the @state. 259 */ 260 static inline void cpuhp_remove_state(enum cpuhp_state state) 261 { 262 __cpuhp_remove_state(state, true); 263 } 264 265 /** 266 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking 267 * teardown 268 * @state: The state for which the calls are removed 269 */ 270 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state) 271 { 272 __cpuhp_remove_state(state, false); 273 } 274 275 /** 276 * cpuhp_remove_multi_state - Remove hotplug multi state callback 277 * @state: The state for which the calls are removed 278 * 279 * Removes the callback functions from a multi state. This is the reverse of 280 * cpuhp_setup_state_multi(). All instances should have been removed before 281 * invoking this function. 282 */ 283 static inline void cpuhp_remove_multi_state(enum cpuhp_state state) 284 { 285 __cpuhp_remove_state(state, false); 286 } 287 288 int __cpuhp_state_remove_instance(enum cpuhp_state state, 289 struct hlist_node *node, bool invoke); 290 291 /** 292 * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke 293 * the teardown callback 294 * @state: The state from which the instance is removed 295 * @node: The node for this individual state. 296 * 297 * Removes the instance and invokes the teardown callback on the present cpus 298 * which have already reached the @state. 299 */ 300 static inline int cpuhp_state_remove_instance(enum cpuhp_state state, 301 struct hlist_node *node) 302 { 303 return __cpuhp_state_remove_instance(state, node, true); 304 } 305 306 /** 307 * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state 308 * without invoking the reatdown callback 309 * @state: The state from which the instance is removed 310 * @node: The node for this individual state. 311 * 312 * Removes the instance without invoking the teardown callback. 313 */ 314 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state, 315 struct hlist_node *node) 316 { 317 return __cpuhp_state_remove_instance(state, node, false); 318 } 319 320 #ifdef CONFIG_SMP 321 void cpuhp_online_idle(enum cpuhp_state state); 322 #else 323 static inline void cpuhp_online_idle(enum cpuhp_state state) { } 324 #endif 325 326 #endif 327