1 // SPDX-License-Identifier: GPL-2.0-only
11 #include <linux/kernel.h>
15 #include <linux/percpu-defs.h>
39 static unsigned int amd_powersave_bias_target(struct cpufreq_policy *policy,  in amd_powersave_bias_target()  argument
46 	struct cpu_data_t *data = &per_cpu(cpu_data, policy->cpu);  in amd_powersave_bias_target()
47 	struct policy_dbs_info *policy_dbs = policy->governor_data;  in amd_powersave_bias_target()
48 	struct dbs_data *od_data = policy_dbs->dbs_data;  in amd_powersave_bias_target()
49 	struct od_dbs_tuners *od_tuners = od_data->tuners;  in amd_powersave_bias_target()
51 	if (!policy->freq_table)  in amd_powersave_bias_target()
54 	rdmsr_on_cpu(policy->cpu, MSR_AMD64_FREQ_SENSITIVITY_ACTUAL,  in amd_powersave_bias_target()
56 	rdmsr_on_cpu(policy->cpu, MSR_AMD64_FREQ_SENSITIVITY_REFERENCE,  in amd_powersave_bias_target()
62 	if (actual.q < data->actual || reference.q < data->reference) {  in amd_powersave_bias_target()
63 		freq_next = policy->cur;  in amd_powersave_bias_target()
67 	d_actual = actual.q - data->actual;  in amd_powersave_bias_target()
68 	d_reference = reference.q - data->reference;  in amd_powersave_bias_target()
72 		freq_next = policy->cur;  in amd_powersave_bias_target()
76 	sensitivity = POWERSAVE_BIAS_MAX -  in amd_powersave_bias_target()
77 		(POWERSAVE_BIAS_MAX * (d_reference - d_actual) / d_reference);  in amd_powersave_bias_target()
82 	if (sensitivity < od_tuners->powersave_bias) {  in amd_powersave_bias_target()
83 		if (data->freq_prev == policy->cur)  in amd_powersave_bias_target()
84 			freq_next = policy->cur;  in amd_powersave_bias_target()
86 		if (freq_next > policy->cur)  in amd_powersave_bias_target()
87 			freq_next = policy->cur;  in amd_powersave_bias_target()
88 		else if (freq_next < policy->cur)  in amd_powersave_bias_target()
89 			freq_next = policy->min;  in amd_powersave_bias_target()
93 			index = cpufreq_table_find_index_h(policy,  in amd_powersave_bias_target()
94 							   policy->cur - 1,  in amd_powersave_bias_target()
96 			freq_next = policy->freq_table[index].frequency;  in amd_powersave_bias_target()
99 		data->freq_prev = freq_next;  in amd_powersave_bias_target()
101 		data->freq_prev = 0;  in amd_powersave_bias_target()
104 	data->actual = actual.q;  in amd_powersave_bias_target()
105 	data->reference = reference.q;  in amd_powersave_bias_target()
120 		return -ENODEV;  in amd_freq_sensitivity_init()
127 			return -ENODEV;  in amd_freq_sensitivity_init()
133 		return -ENODEV;  in amd_freq_sensitivity_init()
136 		return -ENODEV;  in amd_freq_sensitivity_init()