Lines Matching +full:1 +full:- +full:cpu
1 // SPDX-License-Identifier: GPL-2.0-or-later
10 * PowerPC-64 Support added by Dave Engebretsen, Peter Bergner, and
29 #include <linux/cpu.h>
59 #include <asm/asm-prototypes.h>
73 /* State of each CPU during hotplug phases */
102 #define THREAD_GROUP_SHARE_L1 1
111 * On big-cores system, cpu_l1_cache_map for each CPU corresponds to
112 * the set its siblings that share the L1-cache.
122 int smt_enabled_at_boot = 1;
125 * Returns 1 if the specified cpu should be brought up during boot.
131 /* Special case - we inhibit secondary thread startup in smp_generic_cpu_bootable()
142 return 1; in smp_generic_cpu_bootable()
150 return -EINVAL; in smp_generic_kick_cpu()
154 * cpu_start field to become non-zero After we set cpu_start, in smp_generic_kick_cpu()
157 if (!paca_ptrs[nr]->cpu_start) { in smp_generic_kick_cpu()
158 paca_ptrs[nr]->cpu_start = 1; in smp_generic_kick_cpu()
165 * Ok it's not there, so it might be soft-unplugged, let's in smp_generic_kick_cpu()
217 * The NMI IPI is a fallback and not truly non-maskable. It is simpler
225 [PPC_MSG_TICK_BROADCAST] = "ipi tick-broadcast",
238 return -EINVAL; in smp_request_message_ipi()
241 return 1; in smp_request_message_ipi()
259 void smp_muxed_ipi_set_message(int cpu, int msg) in smp_muxed_ipi_set_message() argument
261 struct cpu_messages *info = &per_cpu(ipi_message, cpu); in smp_muxed_ipi_set_message()
262 char *message = (char *)&info->messages; in smp_muxed_ipi_set_message()
268 message[msg] = 1; in smp_muxed_ipi_set_message()
271 void smp_muxed_ipi_message_pass(int cpu, int msg) in smp_muxed_ipi_message_pass() argument
273 smp_muxed_ipi_set_message(cpu, msg); in smp_muxed_ipi_message_pass()
279 smp_ops->cause_ipi(cpu); in smp_muxed_ipi_message_pass()
283 #define IPI_MESSAGE(A) (1uL << ((BITS_PER_LONG - 8) - 8 * (A)))
285 #define IPI_MESSAGE(A) (1uL << (8 * (A)))
295 /* sync-free variant. Callers should ensure synchronization */
303 all = xchg(&info->messages, 0); in smp_ipi_demux_relaxed()
327 } while (info->messages); in smp_ipi_demux_relaxed()
333 static inline void do_message_pass(int cpu, int msg) in do_message_pass() argument
335 if (smp_ops->message_pass) in do_message_pass()
336 smp_ops->message_pass(cpu, msg); in do_message_pass()
339 smp_muxed_ipi_message_pass(cpu, msg); in do_message_pass()
343 void smp_send_reschedule(int cpu) in smp_send_reschedule() argument
346 do_message_pass(cpu, PPC_MSG_RESCHEDULE); in smp_send_reschedule()
350 void arch_send_call_function_single_ipi(int cpu) in arch_send_call_function_single_ipi() argument
352 do_message_pass(cpu, PPC_MSG_CALL_FUNCTION); in arch_send_call_function_single_ipi()
357 unsigned int cpu; in arch_send_call_function_ipi_mask() local
359 for_each_cpu(cpu, mask) in arch_send_call_function_ipi_mask()
360 do_message_pass(cpu, PPC_MSG_CALL_FUNCTION); in arch_send_call_function_ipi_mask()
374 * concurrency or re-entrancy.
394 while (atomic_cmpxchg(&__nmi_ipi_lock, 0, 1) == 1) { in nmi_ipi_lock_start()
404 while (atomic_cmpxchg(&__nmi_ipi_lock, 0, 1) == 1) in nmi_ipi_lock()
411 WARN_ON(atomic_read(&__nmi_ipi_lock) != 1); in nmi_ipi_unlock()
441 ret = 1; in smp_handle_nmi_ipi()
451 static void do_smp_send_nmi_ipi(int cpu, bool safe) in do_smp_send_nmi_ipi() argument
453 if (!safe && smp_ops->cause_nmi_ipi && smp_ops->cause_nmi_ipi(cpu)) in do_smp_send_nmi_ipi()
456 if (cpu >= 0) { in do_smp_send_nmi_ipi()
457 do_message_pass(cpu, PPC_MSG_NMI_IPI); in do_smp_send_nmi_ipi()
470 * - cpu is the target CPU (must not be this CPU), or NMI_IPI_ALL_OTHERS.
471 * - fn is the target callback function.
472 * - delay_us > 0 is the delay before giving up waiting for targets to
475 static int __smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), in __smp_send_nmi_ipi() argument
480 int ret = 1; in __smp_send_nmi_ipi()
482 BUG_ON(cpu == me); in __smp_send_nmi_ipi()
483 BUG_ON(cpu < 0 && cpu != NMI_IPI_ALL_OTHERS); in __smp_send_nmi_ipi()
499 if (cpu < 0) { in __smp_send_nmi_ipi()
504 cpumask_set_cpu(cpu, &nmi_ipi_pending_mask); in __smp_send_nmi_ipi()
511 do_smp_send_nmi_ipi(cpu, safe); in __smp_send_nmi_ipi()
517 udelay(1); in __smp_send_nmi_ipi()
520 delay_us--; in __smp_send_nmi_ipi()
540 int smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us) in smp_send_nmi_ipi() argument
542 return __smp_send_nmi_ipi(cpu, fn, delay_us, false); in smp_send_nmi_ipi()
545 int smp_send_safe_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us) in smp_send_safe_nmi_ipi() argument
547 return __smp_send_nmi_ipi(cpu, fn, delay_us, true); in smp_send_safe_nmi_ipi()
554 unsigned int cpu; in tick_broadcast() local
556 for_each_cpu(cpu, mask) in tick_broadcast()
557 do_message_pass(cpu, PPC_MSG_TICK_BROADCAST); in tick_broadcast()
576 int cpu; in crash_send_ipi() local
580 for_each_present_cpu(cpu) { in crash_send_ipi()
581 if (cpu_online(cpu)) in crash_send_ipi()
592 do_smp_send_nmi_ipi(cpu, false); in crash_send_ipi()
605 * Just busy wait here and avoid marking CPU as offline to ensure in crash_stop_this_cpu()
608 while (1) in crash_stop_this_cpu()
618 * on ibm,os-term rtas call. Skip IPI callbacks to other CPUs before in crash_smp_send_stop()
646 while (1) in nmi_stop_this_cpu()
670 while (1) in stop_this_cpu()
700 = (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1; in smp_store_cpu_info()
705 * Relationships between CPUs are maintained in a set of per-cpu cpumasks so
707 * returns the that cpumask for the given CPU.
725 * Extends set_cpus_related. Instead of setting one CPU at a time in
747 * parse_thread_groups: Parses the "ibm,thread-groups" device tree
748 * property for the CPU device node @dn and stores
750 * structure @tg if the ibm,thread-groups[0]
753 * @dn: The device node of the CPU device.
755 * output of "ibm,thread-groups" is stored.
756 * @property: The property of the thread-group that the caller is
759 * ibm,thread-groups[0..N-1] array defines which group of threads in
760 * the CPU-device node can be grouped together based on the property.
762 * ibm,thread-groups[0] tells us the property based on which the
763 * threads are being grouped together. If this value is 1, it implies
766 * ibm,thread-groups[1] tells us how many such thread groups exist.
768 * ibm,thread-groups[2] tells us the number of threads in each such
771 * ibm,thread-groups[3..N-1] is the list of threads identified by
772 * "ibm,ppc-interrupt-server#s" arranged as per their membership in
775 * Example: If ibm,thread-groups = [1,2,4,5,6,7,8,9,10,11,12] it
779 * The "ibm,ppc-interrupt-server#s" of the first group is {5,6,7,8}
780 * and the "ibm,ppc-interrupt-server#s" of the second group is {9, 10,
783 * Returns 0 on success, -EINVAL if the property does not exist,
784 * -ENODATA if property does not have a value, and -EOVERFLOW if the
797 ret = of_property_read_u32_array(dn, "ibm,thread-groups", in parse_thread_groups()
802 tg->property = thread_group_array[0]; in parse_thread_groups()
803 tg->nr_groups = thread_group_array[1]; in parse_thread_groups()
804 tg->threads_per_group = thread_group_array[2]; in parse_thread_groups()
805 if (tg->property != property || in parse_thread_groups()
806 tg->nr_groups < 1 || in parse_thread_groups()
807 tg->threads_per_group < 1) in parse_thread_groups()
808 return -ENODATA; in parse_thread_groups()
810 total_threads = tg->nr_groups * tg->threads_per_group; in parse_thread_groups()
812 ret = of_property_read_u32_array(dn, "ibm,thread-groups", in parse_thread_groups()
821 tg->thread_list[i] = thread_list[i]; in parse_thread_groups()
827 * get_cpu_thread_group_start : Searches the thread group in tg->thread_list
828 * that @cpu belongs to.
830 * @cpu : The logical CPU whose thread group is being searched.
831 * @tg : The thread-group structure of the CPU node which @cpu belongs
834 * Returns the index to tg->thread_list that points to the the start
835 * of the thread_group that @cpu belongs to.
837 * Returns -1 if cpu doesn't belong to any of the groups pointed to by
838 * tg->thread_list.
840 static int get_cpu_thread_group_start(int cpu, struct thread_groups *tg) in get_cpu_thread_group_start() argument
842 int hw_cpu_id = get_hard_smp_processor_id(cpu); in get_cpu_thread_group_start()
845 for (i = 0; i < tg->nr_groups; i++) { in get_cpu_thread_group_start()
846 int group_start = i * tg->threads_per_group; in get_cpu_thread_group_start()
848 for (j = 0; j < tg->threads_per_group; j++) { in get_cpu_thread_group_start()
851 if (tg->thread_list[idx] == hw_cpu_id) in get_cpu_thread_group_start()
856 return -1; in get_cpu_thread_group_start()
859 static int init_cpu_l1_cache_map(int cpu) in init_cpu_l1_cache_map() argument
862 struct device_node *dn = of_get_cpu_node(cpu, NULL); in init_cpu_l1_cache_map()
866 int first_thread = cpu_first_thread_sibling(cpu); in init_cpu_l1_cache_map()
867 int i, cpu_group_start = -1, err = 0; in init_cpu_l1_cache_map()
870 return -ENODATA; in init_cpu_l1_cache_map()
876 cpu_group_start = get_cpu_thread_group_start(cpu, &tg); in init_cpu_l1_cache_map()
878 if (unlikely(cpu_group_start == -1)) { in init_cpu_l1_cache_map()
879 WARN_ON_ONCE(1); in init_cpu_l1_cache_map()
880 err = -ENODATA; in init_cpu_l1_cache_map()
884 zalloc_cpumask_var_node(&per_cpu(cpu_l1_cache_map, cpu), in init_cpu_l1_cache_map()
885 GFP_KERNEL, cpu_to_node(cpu)); in init_cpu_l1_cache_map()
890 if (unlikely(i_group_start == -1)) { in init_cpu_l1_cache_map()
891 WARN_ON_ONCE(1); in init_cpu_l1_cache_map()
892 err = -ENODATA; in init_cpu_l1_cache_map()
897 cpumask_set_cpu(i, per_cpu(cpu_l1_cache_map, cpu)); in init_cpu_l1_cache_map()
934 * returns a non-const pointer and the compiler barfs on that.
936 static const struct cpumask *shared_cache_mask(int cpu) in shared_cache_mask() argument
938 return per_cpu(cpu_l2_cache_map, cpu); in shared_cache_mask()
942 static const struct cpumask *smallcore_smt_mask(int cpu) in smallcore_smt_mask() argument
944 return cpu_smallcore_mask(cpu); in smallcore_smt_mask()
948 static struct cpumask *cpu_coregroup_mask(int cpu) in cpu_coregroup_mask() argument
950 return per_cpu(cpu_coregroup_map, cpu); in cpu_coregroup_mask()
958 static const struct cpumask *cpu_mc_mask(int cpu) in cpu_mc_mask() argument
960 return cpu_coregroup_mask(cpu); in cpu_mc_mask()
975 int cpu; in init_big_cores() local
977 for_each_possible_cpu(cpu) { in init_big_cores()
978 int err = init_cpu_l1_cache_map(cpu); in init_big_cores()
983 zalloc_cpumask_var_node(&per_cpu(cpu_smallcore_map, cpu), in init_big_cores()
985 cpu_to_node(cpu)); in init_big_cores()
994 unsigned int cpu; in smp_prepare_cpus() local
999 * setup_cpu may need to be called on the boot cpu. We havent in smp_prepare_cpus()
1004 /* Fixup boot cpu */ in smp_prepare_cpus()
1006 cpu_callin_map[boot_cpuid] = 1; in smp_prepare_cpus()
1008 for_each_possible_cpu(cpu) { in smp_prepare_cpus()
1009 zalloc_cpumask_var_node(&per_cpu(cpu_sibling_map, cpu), in smp_prepare_cpus()
1010 GFP_KERNEL, cpu_to_node(cpu)); in smp_prepare_cpus()
1011 zalloc_cpumask_var_node(&per_cpu(cpu_l2_cache_map, cpu), in smp_prepare_cpus()
1012 GFP_KERNEL, cpu_to_node(cpu)); in smp_prepare_cpus()
1013 zalloc_cpumask_var_node(&per_cpu(cpu_core_map, cpu), in smp_prepare_cpus()
1014 GFP_KERNEL, cpu_to_node(cpu)); in smp_prepare_cpus()
1016 zalloc_cpumask_var_node(&per_cpu(cpu_coregroup_map, cpu), in smp_prepare_cpus()
1017 GFP_KERNEL, cpu_to_node(cpu)); in smp_prepare_cpus()
1023 if (cpu_present(cpu)) { in smp_prepare_cpus()
1024 set_cpu_numa_node(cpu, numa_cpu_lookup_table[cpu]); in smp_prepare_cpus()
1025 set_cpu_numa_mem(cpu, in smp_prepare_cpus()
1026 local_memory_node(numa_cpu_lookup_table[cpu])); in smp_prepare_cpus()
1031 /* Init the cpumasks so the boot CPU is related to itself */ in smp_prepare_cpus()
1045 if (smp_ops && smp_ops->probe) in smp_prepare_cpus()
1046 smp_ops->probe(); in smp_prepare_cpus()
1053 paca_ptrs[boot_cpuid]->__current = current; in smp_prepare_boot_cpu()
1063 unsigned int cpu = smp_processor_id(); in generic_cpu_disable() local
1065 if (cpu == boot_cpuid) in generic_cpu_disable()
1066 return -EBUSY; in generic_cpu_disable()
1068 set_cpu_online(cpu, false); in generic_cpu_disable()
1070 vdso_data->processorCount--; in generic_cpu_disable()
1072 /* Update affinity of all IRQs previously aimed at this CPU */ in generic_cpu_disable()
1077 * that one of the interrupts we just migrated away from this CPU is in generic_cpu_disable()
1078 * actually already pending on this CPU. If we leave it in that state in generic_cpu_disable()
1081 * be received (and EOI'ed), before we take this CPU offline. in generic_cpu_disable()
1084 mdelay(1); in generic_cpu_disable()
1090 void generic_cpu_die(unsigned int cpu) in generic_cpu_die() argument
1096 if (is_cpu_dead(cpu)) in generic_cpu_die()
1100 printk(KERN_ERR "CPU%d didn't die...\n", cpu); in generic_cpu_die()
1103 void generic_set_cpu_dead(unsigned int cpu) in generic_set_cpu_dead() argument
1105 per_cpu(cpu_state, cpu) = CPU_DEAD; in generic_set_cpu_dead()
1113 void generic_set_cpu_up(unsigned int cpu) in generic_set_cpu_up() argument
1115 per_cpu(cpu_state, cpu) = CPU_UP_PREPARE; in generic_set_cpu_up()
1118 int generic_check_cpu_restart(unsigned int cpu) in generic_check_cpu_restart() argument
1120 return per_cpu(cpu_state, cpu) == CPU_UP_PREPARE; in generic_check_cpu_restart()
1123 int is_cpu_dead(unsigned int cpu) in is_cpu_dead() argument
1125 return per_cpu(cpu_state, cpu) == CPU_DEAD; in is_cpu_dead()
1139 static void cpu_idle_thread_init(unsigned int cpu, struct task_struct *idle) in cpu_idle_thread_init() argument
1142 paca_ptrs[cpu]->__current = idle; in cpu_idle_thread_init()
1143 paca_ptrs[cpu]->kstack = (unsigned long)task_stack_page(idle) + in cpu_idle_thread_init()
1144 THREAD_SIZE - STACK_FRAME_OVERHEAD; in cpu_idle_thread_init()
1146 idle->cpu = cpu; in cpu_idle_thread_init()
1147 secondary_current = current_set[cpu] = idle; in cpu_idle_thread_init()
1150 int __cpu_up(unsigned int cpu, struct task_struct *tidle) in __cpu_up() argument
1157 if (threads_per_core > 1 && secondaries_inhibited() && in __cpu_up()
1158 cpu_thread_in_subcore(cpu)) in __cpu_up()
1159 return -EBUSY; in __cpu_up()
1162 (smp_ops->cpu_bootable && !smp_ops->cpu_bootable(cpu))) in __cpu_up()
1163 return -EINVAL; in __cpu_up()
1165 cpu_idle_thread_init(cpu, tidle); in __cpu_up()
1169 * up the CPU in __cpu_up()
1171 if (smp_ops->prepare_cpu) { in __cpu_up()
1172 rc = smp_ops->prepare_cpu(cpu); in __cpu_up()
1177 /* Make sure callin-map entry is 0 (can be leftover a CPU in __cpu_up()
1180 cpu_callin_map[cpu] = 0; in __cpu_up()
1189 DBG("smp: kicking cpu %d\n", cpu); in __cpu_up()
1190 rc = smp_ops->kick_cpu(cpu); in __cpu_up()
1192 pr_err("smp: failed starting cpu %d (rc %d)\n", cpu, rc); in __cpu_up()
1197 * wait to see if the cpu made a callin (is actually up). in __cpu_up()
1199 * -- Cort in __cpu_up()
1202 for (c = 50000; c && !cpu_callin_map[cpu]; c--) in __cpu_up()
1210 for (c = 5000; c && !cpu_callin_map[cpu]; c--) in __cpu_up()
1211 msleep(1); in __cpu_up()
1214 if (!cpu_callin_map[cpu]) { in __cpu_up()
1215 printk(KERN_ERR "Processor %u is stuck.\n", cpu); in __cpu_up()
1216 return -ENOENT; in __cpu_up()
1219 DBG("Processor %u found.\n", cpu); in __cpu_up()
1221 if (smp_ops->give_timebase) in __cpu_up()
1222 smp_ops->give_timebase(); in __cpu_up()
1224 /* Wait until cpu puts itself in the online & active maps */ in __cpu_up()
1225 spin_until_cond(cpu_online(cpu)); in __cpu_up()
1231 * logical cpu.
1233 int cpu_to_core_id(int cpu) in cpu_to_core_id() argument
1237 int id = -1; in cpu_to_core_id()
1239 np = of_get_cpu_node(cpu, NULL); in cpu_to_core_id()
1254 /* Helper routines for cpu to core mapping */
1255 int cpu_core_index_of_thread(int cpu) in cpu_core_index_of_thread() argument
1257 return cpu >> threads_shift; in cpu_core_index_of_thread()
1268 * i.e. during cpu online or offline.
1270 static struct device_node *cpu_to_l2cache(int cpu) in cpu_to_l2cache() argument
1275 if (!cpu_present(cpu)) in cpu_to_l2cache()
1278 np = of_get_cpu_node(cpu, NULL); in cpu_to_l2cache()
1289 static bool update_mask_by_l2(int cpu, cpumask_var_t *mask) in update_mask_by_l2() argument
1298 l2_cache = cpu_to_l2cache(cpu); in update_mask_by_l2()
1300 /* Assume only core siblings share cache with this CPU */ in update_mask_by_l2()
1301 for_each_cpu(i, submask_fn(cpu)) in update_mask_by_l2()
1302 set_cpus_related(cpu, i, cpu_l2_cache_mask); in update_mask_by_l2()
1307 cpumask_and(*mask, cpu_online_mask, cpu_cpu_mask(cpu)); in update_mask_by_l2()
1309 /* Update l2-cache mask with all the CPUs that are part of submask */ in update_mask_by_l2()
1310 or_cpumasks_related(cpu, cpu, submask_fn, cpu_l2_cache_mask); in update_mask_by_l2()
1312 /* Skip all CPUs already part of current CPU l2-cache mask */ in update_mask_by_l2()
1313 cpumask_andnot(*mask, *mask, cpu_l2_cache_mask(cpu)); in update_mask_by_l2()
1317 * when updating the marks the current CPU has not been marked in update_mask_by_l2()
1322 /* Skip all CPUs already part of current CPU l2-cache */ in update_mask_by_l2()
1324 or_cpumasks_related(cpu, i, submask_fn, cpu_l2_cache_mask); in update_mask_by_l2()
1338 static void remove_cpu_from_masks(int cpu) in remove_cpu_from_masks() argument
1343 unmap_cpu_from_node(cpu); in remove_cpu_from_masks()
1348 for_each_cpu(i, mask_fn(cpu)) { in remove_cpu_from_masks()
1349 set_cpus_unrelated(cpu, i, cpu_l2_cache_mask); in remove_cpu_from_masks()
1350 set_cpus_unrelated(cpu, i, cpu_sibling_mask); in remove_cpu_from_masks()
1352 set_cpus_unrelated(cpu, i, cpu_smallcore_mask); in remove_cpu_from_masks()
1355 for_each_cpu(i, cpu_core_mask(cpu)) in remove_cpu_from_masks()
1356 set_cpus_unrelated(cpu, i, cpu_core_mask); in remove_cpu_from_masks()
1359 for_each_cpu(i, cpu_coregroup_mask(cpu)) in remove_cpu_from_masks()
1360 set_cpus_unrelated(cpu, i, cpu_coregroup_mask); in remove_cpu_from_masks()
1365 static inline void add_cpu_to_smallcore_masks(int cpu) in add_cpu_to_smallcore_masks() argument
1372 cpumask_set_cpu(cpu, cpu_smallcore_mask(cpu)); in add_cpu_to_smallcore_masks()
1374 for_each_cpu(i, per_cpu(cpu_l1_cache_map, cpu)) { in add_cpu_to_smallcore_masks()
1376 set_cpus_related(i, cpu, cpu_smallcore_mask); in add_cpu_to_smallcore_masks()
1380 static void update_coregroup_mask(int cpu, cpumask_var_t *mask) in update_coregroup_mask() argument
1383 int coregroup_id = cpu_to_coregroup_id(cpu); in update_coregroup_mask()
1390 /* Assume only siblings are part of this CPU's coregroup */ in update_coregroup_mask()
1391 for_each_cpu(i, submask_fn(cpu)) in update_coregroup_mask()
1392 set_cpus_related(cpu, i, cpu_coregroup_mask); in update_coregroup_mask()
1397 cpumask_and(*mask, cpu_online_mask, cpu_cpu_mask(cpu)); in update_coregroup_mask()
1400 or_cpumasks_related(cpu, cpu, submask_fn, cpu_coregroup_mask); in update_coregroup_mask()
1403 cpumask_andnot(*mask, *mask, cpu_coregroup_mask(cpu)); in update_coregroup_mask()
1408 or_cpumasks_related(cpu, i, submask_fn, cpu_coregroup_mask); in update_coregroup_mask()
1416 static void add_cpu_to_masks(int cpu) in add_cpu_to_masks() argument
1419 int first_thread = cpu_first_thread_sibling(cpu); in add_cpu_to_masks()
1420 int chip_id = cpu_to_chip_id(cpu); in add_cpu_to_masks()
1426 * This CPU will not be in the online mask yet so we need to manually in add_cpu_to_masks()
1429 map_cpu_to_node(cpu, cpu_to_node(cpu)); in add_cpu_to_masks()
1430 cpumask_set_cpu(cpu, cpu_sibling_mask(cpu)); in add_cpu_to_masks()
1431 cpumask_set_cpu(cpu, cpu_core_mask(cpu)); in add_cpu_to_masks()
1435 set_cpus_related(i, cpu, cpu_sibling_mask); in add_cpu_to_masks()
1437 add_cpu_to_smallcore_masks(cpu); in add_cpu_to_masks()
1439 /* In CPU-hotplug path, hence use GFP_ATOMIC */ in add_cpu_to_masks()
1440 ret = alloc_cpumask_var_node(&mask, GFP_ATOMIC, cpu_to_node(cpu)); in add_cpu_to_masks()
1441 update_mask_by_l2(cpu, &mask); in add_cpu_to_masks()
1444 update_coregroup_mask(cpu, &mask); in add_cpu_to_masks()
1450 or_cpumasks_related(cpu, cpu, submask_fn, cpu_core_mask); in add_cpu_to_masks()
1452 /* Skip all CPUs already part of current CPU core mask */ in add_cpu_to_masks()
1453 cpumask_andnot(mask, cpu_online_mask, cpu_core_mask(cpu)); in add_cpu_to_masks()
1455 /* If chip_id is -1; limit the cpu_core_mask to within DIE*/ in add_cpu_to_masks()
1456 if (chip_id == -1) in add_cpu_to_masks()
1457 cpumask_and(mask, mask, cpu_cpu_mask(cpu)); in add_cpu_to_masks()
1461 or_cpumasks_related(cpu, i, submask_fn, cpu_core_mask); in add_cpu_to_masks()
1474 unsigned int cpu = raw_smp_processor_id(); in start_secondary() local
1477 current->active_mm = &init_mm; in start_secondary()
1479 smp_store_cpu_info(cpu); in start_secondary()
1481 rcu_cpu_starting(cpu); in start_secondary()
1482 cpu_callin_map[cpu] = 1; in start_secondary()
1484 if (smp_ops->setup_cpu) in start_secondary()
1485 smp_ops->setup_cpu(cpu); in start_secondary()
1486 if (smp_ops->take_timebase) in start_secondary()
1487 smp_ops->take_timebase(); in start_secondary()
1493 vdso_data->processorCount++; in start_secondary()
1497 set_numa_node(numa_cpu_lookup_table[cpu]); in start_secondary()
1498 set_numa_mem(local_memory_node(numa_cpu_lookup_table[cpu])); in start_secondary()
1500 /* Update topology CPU masks */ in start_secondary()
1501 add_cpu_to_masks(cpu); in start_secondary()
1505 * per-core basis because one core in the pair might be disabled. in start_secondary()
1509 struct cpumask *mask = cpu_l2_cache_mask(cpu); in start_secondary()
1514 if (cpumask_weight(mask) > cpumask_weight(sibling_mask(cpu))) in start_secondary()
1519 notify_cpu_starting(cpu); in start_secondary()
1520 set_cpu_online(cpu, true); in start_secondary()
1558 * - Dont consolidate if masks are different. in fixup_topology()
1559 * - Dont consolidate if sd_flags exists and are different. in fixup_topology()
1561 for (i = 1; i <= die_idx; i++) { in fixup_topology()
1562 if (powerpc_topology[i].mask != powerpc_topology[i - 1].mask) in fixup_topology()
1565 if (powerpc_topology[i].sd_flags && powerpc_topology[i - 1].sd_flags && in fixup_topology()
1566 powerpc_topology[i].sd_flags != powerpc_topology[i - 1].sd_flags) in fixup_topology()
1569 if (!powerpc_topology[i - 1].sd_flags) in fixup_topology()
1570 powerpc_topology[i - 1].sd_flags = powerpc_topology[i].sd_flags; in fixup_topology()
1572 powerpc_topology[i].mask = powerpc_topology[i + 1].mask; in fixup_topology()
1573 powerpc_topology[i].sd_flags = powerpc_topology[i + 1].sd_flags; in fixup_topology()
1575 powerpc_topology[i].name = powerpc_topology[i + 1].name; in fixup_topology()
1583 * We are running pinned to the boot CPU, see rest_init(). in smp_cpus_done()
1585 if (smp_ops && smp_ops->setup_cpu) in smp_cpus_done()
1586 smp_ops->setup_cpu(boot_cpuid); in smp_cpus_done()
1588 if (smp_ops && smp_ops->bringup_done) in smp_cpus_done()
1589 smp_ops->bringup_done(); in smp_cpus_done()
1600 int cpu = smp_processor_id(); in __cpu_disable() local
1603 if (!smp_ops->cpu_disable) in __cpu_disable()
1604 return -ENOSYS; in __cpu_disable()
1608 err = smp_ops->cpu_disable(); in __cpu_disable()
1613 remove_cpu_from_masks(cpu); in __cpu_disable()
1618 void __cpu_die(unsigned int cpu) in __cpu_die() argument
1620 if (smp_ops->cpu_die) in __cpu_die()
1621 smp_ops->cpu_die(cpu); in __cpu_die()
1627 * Disable on the down path. This will be re-enabled by in arch_cpu_idle_dead()
1632 if (smp_ops->cpu_offline_self) in arch_cpu_idle_dead()
1633 smp_ops->cpu_offline_self(); in arch_cpu_idle_dead()
1635 /* If we return, we re-enter start_secondary */ in arch_cpu_idle_dead()