1 // SPDX-License-Identifier: GPL-2.0-only
42 #include <asm/processor.h>
75 	 * SGI8-15 can be reserved by secure firmware, and thus may
113 	return cpu_vtable[cpu] ? 0 : -ENOMEM;  in secondary_biglittle_prepare()
118 	init_proc_vtable(lookup_processor(read_cpuid_id())->proc);  in secondary_biglittle_init()
136 		return -ENOSYS;  in __cpu_up()
172 			ret = -EIO;  in __cpu_up()
250  * __cpu_disable runs on the processor to be shutdown.
273 	 * OK - migrate IRQs away from this CPU  in __cpu_disable()
282 	 * to write-back dirty lines to unified caches shared by all CPUs.  in __cpu_disable()
313  * Note that we disable IRQs here, but do not re-enable them
315  * of the other hotplug-cpu capable cores, so presumably coming
329 	 * before platform_cpu_kill() gets called - which may disable  in arch_cpu_idle_dead()
368 	 * Do not return to the idle loop - jump back to the secondary  in arch_cpu_idle_dead()
377 		: "r" (task_stack_page(current) + THREAD_SIZE - 8),  in arch_cpu_idle_dead()
387  * per-processor storage.
393 	cpu_info->loops_per_jiffy = loops_per_jiffy;  in smp_store_cpu_info()
394 	cpu_info->cpuid = read_cpuid_id();  in smp_store_cpu_info()
423 	cpu_switch_mm(mm->pgd, mm);  in secondary_start_kernel()
434 	current->active_mm = mm;  in secondary_start_kernel()
442 	pr_debug("CPU%u: Booted secondary processor\n", cpu);  in secondary_start_kernel()
463 	 * before we continue - which happens after __cpu_up returns.  in secondary_start_kernel()
520 		 * re-initialize the map in the platforms smp_prepare_cpus()  in smp_prepare_cpus()
554 		seq_printf(p, "%*s%u:%s", prec - 1, "IPI", i,  in show_ipi_list()
597  * ipi_cpu_stop - handle IPI from smp_send_stop()
632  * Main handler for inter-processor interrupts
703 	do_handle_IPI(irq - ipi_irq_base);  in ipi_handler()
765 	while (num_online_cpus() > 1 && timeout--)  in smp_send_stop()
798 	struct cpumask *cpus = freq->policy->cpus;  in cpufreq_callback()
802 	if (freq->flags & CPUFREQ_CONST_LOOPS)  in cpufreq_callback()
809 			per_cpu(l_p_j_ref_freq, cpu) = freq->old;  in cpufreq_callback()
814 			global_l_p_j_ref_freq = freq->old;  in cpufreq_callback()
818 	if ((val == CPUFREQ_PRECHANGE  && freq->old < freq->new) ||  in cpufreq_callback()
819 	    (val == CPUFREQ_POSTCHANGE && freq->old > freq->new)) {  in cpufreq_callback()
822 						freq->new);  in cpufreq_callback()
825 				    per_cpu(l_p_j_ref_freq, first), freq->new);  in cpufreq_callback()