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.
25 #include <linux/kernel.h>
29 #include <linux/amd-pstate.h>
35  * amd_pstate_ut: used as a shortform for AMD P-State unit test.
50  * Kernel module for testing the AMD P-State unit test
127 	struct cpufreq_policy *policy = NULL;  in amd_pstate_ut_check_perf()  local
131 		policy = cpufreq_cpu_get(cpu);  in amd_pstate_ut_check_perf()
132 		if (!policy)  in amd_pstate_ut_check_perf()
134 		cpudata = policy->driver_data;  in amd_pstate_ut_check_perf()
162 		if ((highest_perf != READ_ONCE(cpudata->highest_perf)) ||  in amd_pstate_ut_check_perf()
163 			(nominal_perf != READ_ONCE(cpudata->nominal_perf)) ||  in amd_pstate_ut_check_perf()
164 			(lowest_nonlinear_perf != READ_ONCE(cpudata->lowest_nonlinear_perf)) ||  in amd_pstate_ut_check_perf()
165 			(lowest_perf != READ_ONCE(cpudata->lowest_perf))) {  in amd_pstate_ut_check_perf()
168 				__func__, cpu, highest_perf, cpudata->highest_perf,  in amd_pstate_ut_check_perf()
169 				nominal_perf, cpudata->nominal_perf,  in amd_pstate_ut_check_perf()
170 				lowest_nonlinear_perf, cpudata->lowest_nonlinear_perf,  in amd_pstate_ut_check_perf()
171 				lowest_perf, cpudata->lowest_perf);  in amd_pstate_ut_check_perf()
185 		cpufreq_cpu_put(policy);  in amd_pstate_ut_check_perf()
191 	cpufreq_cpu_put(policy);  in amd_pstate_ut_check_perf()
202 	struct cpufreq_policy *policy = NULL;  in amd_pstate_ut_check_freq()  local
206 		policy = cpufreq_cpu_get(cpu);  in amd_pstate_ut_check_freq()
207 		if (!policy)  in amd_pstate_ut_check_freq()
209 		cpudata = policy->driver_data;  in amd_pstate_ut_check_freq()
211 		if (!((cpudata->max_freq >= cpudata->nominal_freq) &&  in amd_pstate_ut_check_freq()
212 			(cpudata->nominal_freq > cpudata->lowest_nonlinear_freq) &&  in amd_pstate_ut_check_freq()
213 			(cpudata->lowest_nonlinear_freq > cpudata->min_freq) &&  in amd_pstate_ut_check_freq()
214 			(cpudata->min_freq > 0))) {  in amd_pstate_ut_check_freq()
217 				__func__, cpu, cpudata->max_freq, cpudata->nominal_freq,  in amd_pstate_ut_check_freq()
218 				cpudata->lowest_nonlinear_freq, cpudata->min_freq);  in amd_pstate_ut_check_freq()
222 		if (cpudata->min_freq != policy->min) {  in amd_pstate_ut_check_freq()
225 				__func__, cpu, cpudata->min_freq, policy->min);  in amd_pstate_ut_check_freq()
229 		if (cpudata->boost_supported) {  in amd_pstate_ut_check_freq()
230 			if ((policy->max == cpudata->max_freq) ||  in amd_pstate_ut_check_freq()
231 					(policy->max == cpudata->nominal_freq))  in amd_pstate_ut_check_freq()
236 					__func__, cpu, policy->max, cpudata->max_freq,  in amd_pstate_ut_check_freq()
237 					cpudata->nominal_freq);  in amd_pstate_ut_check_freq()
245 		cpufreq_cpu_put(policy);  in amd_pstate_ut_check_freq()
251 	cpufreq_cpu_put(policy);  in amd_pstate_ut_check_freq()
262 			pr_info("%-4d %-20s\t success!\n", i+1, amd_pstate_ut_cases[i].name);  in amd_pstate_ut_init()
266 			pr_info("%-4d %-20s\t fail!\n", i+1, amd_pstate_ut_cases[i].name);  in amd_pstate_ut_init()
282 MODULE_DESCRIPTION("AMD P-state driver Test module");