1 // SPDX-License-Identifier: GPL-2.0
11 #include <linux/cpufreq.h>
47 	 * want to update the scale factor with information from CPUFREQ.  in topology_set_freq_scale()
83 	return sysfs_emit(buf, "%lu\n", topology_get_cpu_scale(cpu->dev.id));  in cpu_capacity_show()
118  * Updating the sched_domains can't be done directly from cpufreq callbacks
176 	ret = of_property_read_u32(cpu_node, "capacity-dmips-mhz",  in topology_parse_cpu_capacity()
194 		 * For non-clk CPU DVFS mechanism, there's no way to get the  in topology_parse_cpu_capacity()
237 		 cpumask_pr_args(policy->related_cpus),  in init_cpu_capacity_callback()
240 	cpumask_andnot(cpus_to_visit, cpus_to_visit, policy->related_cpus);  in init_cpu_capacity_callback()
242 	for_each_cpu(cpu, policy->related_cpus)  in init_cpu_capacity_callback()
243 		per_cpu(freq_factor, cpu) = policy->cpuinfo.max_freq / 1000;  in init_cpu_capacity_callback()
265 	 * on ACPI-based systems we need to use the default cpu capacity  in register_cpufreq_notifier()
267 	 * skip registering cpufreq notifier.  in register_cpufreq_notifier()
270 		return -EINVAL;  in register_cpufreq_notifier()
273 		return -ENOMEM;  in register_cpufreq_notifier()
303  * (2) -ENODEV when the device tree(DT) node is valid and found in the DT but
307  * (3) -1 if the node does not exist in the device tree
316 		return -1;  in get_cpu_for_node()
348 			} else if (cpu != -ENODEV) {  in parse_core()
351 				return -EINVAL;  in parse_core()
363 			return -EINVAL;  in parse_core()
368 	} else if (leaf && cpu != -ENODEV) {  in parse_core()
370 		return -EINVAL;  in parse_core()
376 static int __init parse_cluster(struct device_node *cluster, int depth)  in parse_cluster()  argument
393 		snprintf(name, sizeof(name), "cluster%d", i);  in parse_cluster()
394 		c = of_get_child_by_name(cluster, name);  in parse_cluster()
409 		c = of_get_child_by_name(cluster, name);  in parse_cluster()
414 				pr_err("%pOF: cpu-map children should be clusters\n",  in parse_cluster()
417 				return -EINVAL;  in parse_cluster()
423 				pr_err("%pOF: Non-leaf cluster with core %s\n",  in parse_cluster()
424 				       cluster, name);  in parse_cluster()
425 				ret = -EINVAL;  in parse_cluster()
436 		pr_warn("%pOF: empty cluster\n", cluster);  in parse_cluster()
457 	 * When topology is provided cpu-map is essentially a root  in parse_dt_topology()
458 	 * cluster with restricted subnodes.  in parse_dt_topology()
460 	map = of_get_child_by_name(cn, "cpu-map");  in parse_dt_topology()
475 		if (cpu_topology[cpu].package_id == -1)  in parse_dt_topology()
476 			ret = -EINVAL;  in parse_dt_topology()
501 	if (cpu_topology[cpu].llc_id != -1) {  in cpu_coregroup_mask()
518 		if (cpu_topo->llc_id != -1 && cpuid_topo->llc_id == cpu_topo->llc_id) {  in update_siblings_masks()
519 			cpumask_set_cpu(cpu, &cpuid_topo->llc_sibling);  in update_siblings_masks()
520 			cpumask_set_cpu(cpuid, &cpu_topo->llc_sibling);  in update_siblings_masks()
523 		if (cpuid_topo->package_id != cpu_topo->package_id)  in update_siblings_masks()
526 		cpumask_set_cpu(cpuid, &cpu_topo->core_sibling);  in update_siblings_masks()
527 		cpumask_set_cpu(cpu, &cpuid_topo->core_sibling);  in update_siblings_masks()
529 		if (cpuid_topo->core_id != cpu_topo->core_id)  in update_siblings_masks()
532 		cpumask_set_cpu(cpuid, &cpu_topo->thread_sibling);  in update_siblings_masks()
533 		cpumask_set_cpu(cpu, &cpuid_topo->thread_sibling);  in update_siblings_masks()
541 	cpumask_clear(&cpu_topo->llc_sibling);  in clear_cpu_topology()
542 	cpumask_set_cpu(cpu, &cpu_topo->llc_sibling);  in clear_cpu_topology()
544 	cpumask_clear(&cpu_topo->core_sibling);  in clear_cpu_topology()
545 	cpumask_set_cpu(cpu, &cpu_topo->core_sibling);  in clear_cpu_topology()
546 	cpumask_clear(&cpu_topo->thread_sibling);  in clear_cpu_topology()
547 	cpumask_set_cpu(cpu, &cpu_topo->thread_sibling);  in clear_cpu_topology()
557 		cpu_topo->thread_id = -1;  in reset_cpu_topology()
558 		cpu_topo->core_id = -1;  in reset_cpu_topology()
559 		cpu_topo->package_id = -1;  in reset_cpu_topology()
560 		cpu_topo->llc_id = -1;  in reset_cpu_topology()
604 	if (cpuid_topo->package_id != -1)  in store_cpu_topology()
607 	cpuid_topo->thread_id = -1;  in store_cpu_topology()
608 	cpuid_topo->core_id = cpuid;  in store_cpu_topology()
609 	cpuid_topo->package_id = cpu_to_node(cpuid);  in store_cpu_topology()
612 		 cpuid, cpuid_topo->package_id, cpuid_topo->core_id,  in store_cpu_topology()
613 		 cpuid_topo->thread_id);  in store_cpu_topology()