1 // SPDX-License-Identifier: GPL-2.0-only
7 #include <linux/cpufreq.h>
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96 		       base + policy->cpu * PER_CPU_OFFSET + REG_SET_PERF_STATE_OFFSET);  in virt_cpufreq_set_perf()
122 	freqs.old = policy->cur;  in virt_cpufreq_target()
138 	cur_perf_domain = readl_relaxed(base + policy->cpu *  in virt_cpufreq_get_sharing_cpus()
150 			cpumask_set_cpu(cpu, policy->cpus);  in virt_cpufreq_get_sharing_cpus()
161 	num_perftbl_entries = per_cpu(perftbl_num_entries, policy->cpu);  in virt_cpufreq_get_freq_info()
164 		policy->cpuinfo.min_freq = 1;  in virt_cpufreq_get_freq_info()
165 		policy->cpuinfo.max_freq = virt_cpufreq_get_perftbl_entry(policy->cpu, 0);  in virt_cpufreq_get_freq_info()
167 		policy->min = policy->cpuinfo.min_freq;  in virt_cpufreq_get_freq_info()
168 		policy->max = policy->cpuinfo.max_freq;  in virt_cpufreq_get_freq_info()
170 		policy->cur = policy->max;  in virt_cpufreq_get_freq_info()
176 		return -ENOMEM;  in virt_cpufreq_get_freq_info()
179 		table[idx].frequency = virt_cpufreq_get_perftbl_entry(policy->cpu, idx);  in virt_cpufreq_get_freq_info()
182 	policy->freq_table = table;  in virt_cpufreq_get_freq_info()
192 	cpu_dev = get_cpu_device(policy->cpu);  in virt_cpufreq_cpu_init()
194 		return -ENODEV;  in virt_cpufreq_cpu_init()
198 		dev_warn(cpu_dev, "failed to get cpufreq info\n");  in virt_cpufreq_cpu_init()
212 	 * settings) need to be updated. This simplifies the VMM (Virtual  in virt_cpufreq_cpu_init()
216 	policy->dvfs_possible_from_any_cpu = false;  in virt_cpufreq_cpu_init()
217 	policy->fast_switch_possible = true;  in virt_cpufreq_cpu_init()
227 	topology_set_scale_freq_source(&virt_sfd, policy->cpus);  in virt_cpufreq_cpu_init()
234 	topology_clear_scale_freq_source(SCALE_FREQ_SOURCE_VIRT, policy->related_cpus);  in virt_cpufreq_cpu_exit()
235 	kfree(policy->freq_table);  in virt_cpufreq_cpu_exit()
252 	if (policy->freq_table)  in virt_cpufreq_verify_policy()
253 		return cpufreq_frequency_table_verify(policy, policy->freq_table);  in virt_cpufreq_verify_policy()
260 	.name		= "virt-cpufreq",
285 			return -ENODEV;  in virt_cpufreq_driver_probe()
292 		dev_err(&pdev->dev, "Virtual CPUFreq driver failed to register: %d\n", ret);  in virt_cpufreq_driver_probe()
296 	dev_dbg(&pdev->dev, "Virtual CPUFreq driver initialized\n");  in virt_cpufreq_driver_probe()
306 	{ .compatible = "qemu,virtual-cpufreq", .data = NULL},
315 		.name = "virt-cpufreq",
332 MODULE_DESCRIPTION("Virtual cpufreq driver");