1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * AMD Processor P-state Frequency Driver Unit Test
9  * The AMD P-State Unit Test is a test module for testing the amd-pstate
11  * (SBIOS/Firmware or Hardware). 2) Kernel can have a basic function
12  * test to avoid the kernel regression during the update. 3) We can
19  * See Documentation/admin-guide/pm/amd-pstate.rst Unit Tests for
20  * amd-pstate to get more detail.
26 #include <linux/kernel.h>
34 #include "amd-pstate.h"
43  * Kernel module for testing the AMD P-State unit test
76 		return -EINVAL;  in amd_pstate_ut_acpi_cpc_valid()
101 		return -EINVAL;  in amd_pstate_ut_check_enabled()
120 		struct cpufreq_policy *policy __free(put_cpufreq_policy) = NULL;  in amd_pstate_ut_check_perf()
123 		policy = cpufreq_cpu_get(cpu);  in amd_pstate_ut_check_perf()
124 		if (!policy)  in amd_pstate_ut_check_perf()
126 		cpudata = policy->driver_data;  in amd_pstate_ut_check_perf()
152 		cur_perf = READ_ONCE(cpudata->perf);  in amd_pstate_ut_check_perf()
153 		if (highest_perf != cur_perf.highest_perf && !cpudata->hw_prefcore) {  in amd_pstate_ut_check_perf()
156 			return -EINVAL;  in amd_pstate_ut_check_perf()
165 			return -EINVAL;  in amd_pstate_ut_check_perf()
175 			return -EINVAL;  in amd_pstate_ut_check_perf()
192 		struct cpufreq_policy *policy __free(put_cpufreq_policy) = NULL;  in amd_pstate_ut_check_freq()
195 		policy = cpufreq_cpu_get(cpu);  in amd_pstate_ut_check_freq()
196 		if (!policy)  in amd_pstate_ut_check_freq()
198 		cpudata = policy->driver_data;  in amd_pstate_ut_check_freq()
200 		if (!((policy->cpuinfo.max_freq >= cpudata->nominal_freq) &&  in amd_pstate_ut_check_freq()
201 			(cpudata->nominal_freq > cpudata->lowest_nonlinear_freq) &&  in amd_pstate_ut_check_freq()
202 			(cpudata->lowest_nonlinear_freq >= policy->cpuinfo.min_freq) &&  in amd_pstate_ut_check_freq()
203 			(policy->cpuinfo.min_freq > 0))) {  in amd_pstate_ut_check_freq()
205 				__func__, cpu, policy->cpuinfo.max_freq, cpudata->nominal_freq,  in amd_pstate_ut_check_freq()
206 				cpudata->lowest_nonlinear_freq, policy->cpuinfo.min_freq);  in amd_pstate_ut_check_freq()
207 			return -EINVAL;  in amd_pstate_ut_check_freq()
210 		if (cpudata->lowest_nonlinear_freq != policy->min) {  in amd_pstate_ut_check_freq()
212 				__func__, cpu, cpudata->lowest_nonlinear_freq, policy->min);  in amd_pstate_ut_check_freq()
213 			return -EINVAL;  in amd_pstate_ut_check_freq()
216 		if (cpudata->boost_supported) {  in amd_pstate_ut_check_freq()
217 			if ((policy->max != policy->cpuinfo.max_freq) &&  in amd_pstate_ut_check_freq()
218 			    (policy->max != cpudata->nominal_freq)) {  in amd_pstate_ut_check_freq()
220 					__func__, cpu, policy->max, policy->cpuinfo.max_freq,  in amd_pstate_ut_check_freq()
221 					cpudata->nominal_freq);  in amd_pstate_ut_check_freq()
222 				return -EINVAL;  in amd_pstate_ut_check_freq()
226 			return -EINVAL;  in amd_pstate_ut_check_freq()
237 	pr_debug("->setting mode to %s\n", mode_str);  in amd_pstate_set_mode()
255 				pr_err("%s: failed to update status for %s->%s\n", __func__,  in amd_pstate_ut_check_driver()
274 			pr_err("%-4d %-20s\t fail: %d!\n", i+1, amd_pstate_ut_cases[i].name, ret);  in amd_pstate_ut_init()
276 			pr_info("%-4d %-20s\t success!\n", i+1, amd_pstate_ut_cases[i].name);  in amd_pstate_ut_init()
290 MODULE_DESCRIPTION("AMD P-state driver Test module");