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_VIRT_NET_DEAD, 20 CPUHP_SLUB_DEAD, 21 CPUHP_MM_WRITEBACK_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_VIRT_SCSI_DEAD, 30 CPUHP_ACPI_CPUDRV_DEAD, 31 CPUHP_S390_PFAULT_DEAD, 32 CPUHP_BLK_MQ_DEAD, 33 CPUHP_WORKQUEUE_PREP, 34 CPUHP_POWER_NUMA_PREPARE, 35 CPUHP_HRTIMERS_PREPARE, 36 CPUHP_PROFILE_PREPARE, 37 CPUHP_X2APIC_PREPARE, 38 CPUHP_SMPCFD_PREPARE, 39 CPUHP_RELAY_PREPARE, 40 CPUHP_SLAB_PREPARE, 41 CPUHP_MD_RAID5_PREPARE, 42 CPUHP_RCUTREE_PREP, 43 CPUHP_CPUIDLE_COUPLED_PREPARE, 44 CPUHP_POWERPC_PMAC_PREPARE, 45 CPUHP_POWERPC_MMU_CTX_PREPARE, 46 CPUHP_XEN_PREPARE, 47 CPUHP_XEN_EVTCHN_PREPARE, 48 CPUHP_NOTIFY_PREPARE, 49 CPUHP_ARM_SHMOBILE_SCU_PREPARE, 50 CPUHP_SH_SH3X_PREPARE, 51 CPUHP_BLK_MQ_PREPARE, 52 CPUHP_TIMERS_DEAD, 53 CPUHP_NOTF_ERR_INJ_PREPARE, 54 CPUHP_MIPS_SOC_PREPARE, 55 CPUHP_BRINGUP_CPU, 56 CPUHP_AP_IDLE_DEAD, 57 CPUHP_AP_OFFLINE, 58 CPUHP_AP_SCHED_STARTING, 59 CPUHP_AP_RCUTREE_DYING, 60 CPUHP_AP_IRQ_GIC_STARTING, 61 CPUHP_AP_IRQ_GICV3_STARTING, 62 CPUHP_AP_IRQ_HIP04_STARTING, 63 CPUHP_AP_IRQ_ARMADA_XP_STARTING, 64 CPUHP_AP_IRQ_ARMADA_CASC_STARTING, 65 CPUHP_AP_IRQ_BCM2836_STARTING, 66 CPUHP_AP_ARM_MVEBU_COHERENCY, 67 CPUHP_AP_PERF_X86_UNCORE_STARTING, 68 CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING, 69 CPUHP_AP_PERF_X86_STARTING, 70 CPUHP_AP_PERF_X86_AMD_IBS_STARTING, 71 CPUHP_AP_PERF_X86_CQM_STARTING, 72 CPUHP_AP_PERF_X86_CSTATE_STARTING, 73 CPUHP_AP_PERF_XTENSA_STARTING, 74 CPUHP_AP_PERF_METAG_STARTING, 75 CPUHP_AP_MIPS_OP_LOONGSON3_STARTING, 76 CPUHP_AP_ARM_VFP_STARTING, 77 CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING, 78 CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING, 79 CPUHP_AP_PERF_ARM_STARTING, 80 CPUHP_AP_ARM_L2X0_STARTING, 81 CPUHP_AP_ARM_ARCH_TIMER_STARTING, 82 CPUHP_AP_ARM_GLOBAL_TIMER_STARTING, 83 CPUHP_AP_DUMMY_TIMER_STARTING, 84 CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING, 85 CPUHP_AP_ARM_TWD_STARTING, 86 CPUHP_AP_METAG_TIMER_STARTING, 87 CPUHP_AP_QCOM_TIMER_STARTING, 88 CPUHP_AP_ARMADA_TIMER_STARTING, 89 CPUHP_AP_MARCO_TIMER_STARTING, 90 CPUHP_AP_MIPS_GIC_TIMER_STARTING, 91 CPUHP_AP_ARC_TIMER_STARTING, 92 CPUHP_AP_KVM_STARTING, 93 CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING, 94 CPUHP_AP_KVM_ARM_VGIC_STARTING, 95 CPUHP_AP_KVM_ARM_TIMER_STARTING, 96 CPUHP_AP_ARM_XEN_STARTING, 97 CPUHP_AP_ARM_CORESIGHT_STARTING, 98 CPUHP_AP_ARM_CORESIGHT4_STARTING, 99 CPUHP_AP_ARM64_ISNDEP_STARTING, 100 CPUHP_AP_SMPCFD_DYING, 101 CPUHP_AP_X86_TBOOT_DYING, 102 CPUHP_AP_ONLINE, 103 CPUHP_TEARDOWN_CPU, 104 CPUHP_AP_ONLINE_IDLE, 105 CPUHP_AP_SMPBOOT_THREADS, 106 CPUHP_AP_X86_VDSO_VMA_ONLINE, 107 CPUHP_AP_PERF_ONLINE, 108 CPUHP_AP_PERF_X86_ONLINE, 109 CPUHP_AP_PERF_X86_UNCORE_ONLINE, 110 CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE, 111 CPUHP_AP_PERF_X86_AMD_POWER_ONLINE, 112 CPUHP_AP_PERF_X86_RAPL_ONLINE, 113 CPUHP_AP_PERF_X86_CQM_ONLINE, 114 CPUHP_AP_PERF_X86_CSTATE_ONLINE, 115 CPUHP_AP_PERF_S390_CF_ONLINE, 116 CPUHP_AP_PERF_S390_SF_ONLINE, 117 CPUHP_AP_PERF_ARM_CCI_ONLINE, 118 CPUHP_AP_PERF_ARM_CCN_ONLINE, 119 CPUHP_AP_PERF_ARM_L2X0_ONLINE, 120 CPUHP_AP_WORKQUEUE_ONLINE, 121 CPUHP_AP_RCUTREE_ONLINE, 122 CPUHP_AP_NOTIFY_ONLINE, 123 CPUHP_AP_ONLINE_DYN, 124 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30, 125 CPUHP_AP_X86_HPET_ONLINE, 126 CPUHP_AP_X86_KVM_CLK_ONLINE, 127 CPUHP_AP_ACTIVE, 128 CPUHP_ONLINE, 129 }; 130 131 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke, 132 int (*startup)(unsigned int cpu), 133 int (*teardown)(unsigned int cpu), bool multi_instance); 134 135 /** 136 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks 137 * @state: The state for which the calls are installed 138 * @name: Name of the callback (will be used in debug output) 139 * @startup: startup callback function 140 * @teardown: teardown callback function 141 * 142 * Installs the callback functions and invokes the startup callback on 143 * the present cpus which have already reached the @state. 144 */ 145 static inline int cpuhp_setup_state(enum cpuhp_state state, 146 const char *name, 147 int (*startup)(unsigned int cpu), 148 int (*teardown)(unsigned int cpu)) 149 { 150 return __cpuhp_setup_state(state, name, true, startup, teardown, false); 151 } 152 153 /** 154 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the 155 * callbacks 156 * @state: The state for which the calls are installed 157 * @name: Name of the callback. 158 * @startup: startup callback function 159 * @teardown: teardown callback function 160 * 161 * Same as @cpuhp_setup_state except that no calls are executed are invoked 162 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n. 163 */ 164 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state, 165 const char *name, 166 int (*startup)(unsigned int cpu), 167 int (*teardown)(unsigned int cpu)) 168 { 169 return __cpuhp_setup_state(state, name, false, startup, teardown, 170 false); 171 } 172 173 /** 174 * cpuhp_setup_state_multi - Add callbacks for multi state 175 * @state: The state for which the calls are installed 176 * @name: Name of the callback. 177 * @startup: startup callback function 178 * @teardown: teardown callback function 179 * 180 * Sets the internal multi_instance flag and prepares a state to work as a multi 181 * instance callback. No callbacks are invoked at this point. The callbacks are 182 * invoked once an instance for this state are registered via 183 * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls. 184 */ 185 static inline int cpuhp_setup_state_multi(enum cpuhp_state state, 186 const char *name, 187 int (*startup)(unsigned int cpu, 188 struct hlist_node *node), 189 int (*teardown)(unsigned int cpu, 190 struct hlist_node *node)) 191 { 192 return __cpuhp_setup_state(state, name, false, 193 (void *) startup, 194 (void *) teardown, true); 195 } 196 197 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node, 198 bool invoke); 199 200 /** 201 * cpuhp_state_add_instance - Add an instance for a state and invoke startup 202 * callback. 203 * @state: The state for which the instance is installed 204 * @node: The node for this individual state. 205 * 206 * Installs the instance for the @state and invokes the startup callback on 207 * the present cpus which have already reached the @state. The @state must have 208 * been earlier marked as multi-instance by @cpuhp_setup_state_multi. 209 */ 210 static inline int cpuhp_state_add_instance(enum cpuhp_state state, 211 struct hlist_node *node) 212 { 213 return __cpuhp_state_add_instance(state, node, true); 214 } 215 216 /** 217 * cpuhp_state_add_instance_nocalls - Add an instance for a state without 218 * invoking the startup callback. 219 * @state: The state for which the instance is installed 220 * @node: The node for this individual state. 221 * 222 * Installs the instance for the @state The @state must have been earlier 223 * marked as multi-instance by @cpuhp_setup_state_multi. 224 */ 225 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state, 226 struct hlist_node *node) 227 { 228 return __cpuhp_state_add_instance(state, node, false); 229 } 230 231 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke); 232 233 /** 234 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown 235 * @state: The state for which the calls are removed 236 * 237 * Removes the callback functions and invokes the teardown callback on 238 * the present cpus which have already reached the @state. 239 */ 240 static inline void cpuhp_remove_state(enum cpuhp_state state) 241 { 242 __cpuhp_remove_state(state, true); 243 } 244 245 /** 246 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking 247 * teardown 248 * @state: The state for which the calls are removed 249 */ 250 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state) 251 { 252 __cpuhp_remove_state(state, false); 253 } 254 255 /** 256 * cpuhp_remove_multi_state - Remove hotplug multi state callback 257 * @state: The state for which the calls are removed 258 * 259 * Removes the callback functions from a multi state. This is the reverse of 260 * cpuhp_setup_state_multi(). All instances should have been removed before 261 * invoking this function. 262 */ 263 static inline void cpuhp_remove_multi_state(enum cpuhp_state state) 264 { 265 __cpuhp_remove_state(state, false); 266 } 267 268 int __cpuhp_state_remove_instance(enum cpuhp_state state, 269 struct hlist_node *node, bool invoke); 270 271 /** 272 * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke 273 * the teardown callback 274 * @state: The state from which the instance is removed 275 * @node: The node for this individual state. 276 * 277 * Removes the instance and invokes the teardown callback on the present cpus 278 * which have already reached the @state. 279 */ 280 static inline int cpuhp_state_remove_instance(enum cpuhp_state state, 281 struct hlist_node *node) 282 { 283 return __cpuhp_state_remove_instance(state, node, true); 284 } 285 286 /** 287 * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state 288 * without invoking the reatdown callback 289 * @state: The state from which the instance is removed 290 * @node: The node for this individual state. 291 * 292 * Removes the instance without invoking the teardown callback. 293 */ 294 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state, 295 struct hlist_node *node) 296 { 297 return __cpuhp_state_remove_instance(state, node, false); 298 } 299 300 #ifdef CONFIG_SMP 301 void cpuhp_online_idle(enum cpuhp_state state); 302 #else 303 static inline void cpuhp_online_idle(enum cpuhp_state state) { } 304 #endif 305 306 #endif 307