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
12  * test to avoid the kernel regression during the update. 3) We can
17  * additional test cases to improve the depth and coverage of the test.
19  * See Documentation/admin-guide/pm/amd-pstate.rst Unit Tests for
20  * amd-pstate to get more detail.
36 #include "amd-pstate.h"
45  * Kernel module for testing the AMD P-State unit test
78 		return -EINVAL;  in amd_pstate_ut_acpi_cpc_valid()
103 		return -EINVAL;  in amd_pstate_ut_check_enabled()
115 	int cpu = 0, ret = 0;  in amd_pstate_ut_check_perf()  local
121 	for_each_online_cpu(cpu) {  in amd_pstate_ut_check_perf()
125 		policy = cpufreq_cpu_get(cpu);  in amd_pstate_ut_check_perf()
128 		cpudata = policy->driver_data;  in amd_pstate_ut_check_perf()
131 			ret = cppc_get_perf_caps(cpu, &cppc_perf);  in amd_pstate_ut_check_perf()
142 			ret = rdmsrq_safe_on_cpu(cpu, MSR_AMD_CPPC_CAP1, &cap1);  in amd_pstate_ut_check_perf()
154 		cur_perf = READ_ONCE(cpudata->perf);  in amd_pstate_ut_check_perf()
155 		if (highest_perf != cur_perf.highest_perf && !cpudata->hw_prefcore) {  in amd_pstate_ut_check_perf()
156 			pr_err("%s cpu%d highest=%d %d highest perf doesn't match\n",  in amd_pstate_ut_check_perf()
157 				__func__, cpu, highest_perf, cur_perf.highest_perf);  in amd_pstate_ut_check_perf()
158 			return -EINVAL;  in amd_pstate_ut_check_perf()
163 			pr_err("%s cpu%d nominal=%d %d lowest_nonlinear=%d %d lowest=%d %d, they should be equal!\n",  in amd_pstate_ut_check_perf()
164 				__func__, cpu, nominal_perf, cur_perf.nominal_perf,  in amd_pstate_ut_check_perf()
167 			return -EINVAL;  in amd_pstate_ut_check_perf()
174 …pr_err("%s cpu%d highest=%d >= nominal=%d > lowest_nonlinear=%d > lowest=%d > 0, the formula is in…  in amd_pstate_ut_check_perf()
175 				__func__, cpu, highest_perf, nominal_perf,  in amd_pstate_ut_check_perf()
177 			return -EINVAL;  in amd_pstate_ut_check_perf()
191 	int cpu = 0;  in amd_pstate_ut_check_freq()  local
193 	for_each_online_cpu(cpu) {  in amd_pstate_ut_check_freq()
197 		policy = cpufreq_cpu_get(cpu);  in amd_pstate_ut_check_freq()
200 		cpudata = policy->driver_data;  in amd_pstate_ut_check_freq()
202 		if (!((policy->cpuinfo.max_freq >= cpudata->nominal_freq) &&  in amd_pstate_ut_check_freq()
203 			(cpudata->nominal_freq > cpudata->lowest_nonlinear_freq) &&  in amd_pstate_ut_check_freq()
204 			(cpudata->lowest_nonlinear_freq >= policy->cpuinfo.min_freq) &&  in amd_pstate_ut_check_freq()
205 			(policy->cpuinfo.min_freq > 0))) {  in amd_pstate_ut_check_freq()
206 …pr_err("%s cpu%d max=%d >= nominal=%d > lowest_nonlinear=%d > min=%d > 0, the formula is incorrect…  in amd_pstate_ut_check_freq()
207 				__func__, cpu, policy->cpuinfo.max_freq, cpudata->nominal_freq,  in amd_pstate_ut_check_freq()
208 				cpudata->lowest_nonlinear_freq, policy->cpuinfo.min_freq);  in amd_pstate_ut_check_freq()
209 			return -EINVAL;  in amd_pstate_ut_check_freq()
212 		if (cpudata->lowest_nonlinear_freq != policy->min) {  in amd_pstate_ut_check_freq()
213 			pr_err("%s cpu%d cpudata_lowest_nonlinear_freq=%d policy_min=%d, they should be equal!\n",  in amd_pstate_ut_check_freq()
214 				__func__, cpu, cpudata->lowest_nonlinear_freq, policy->min);  in amd_pstate_ut_check_freq()
215 			return -EINVAL;  in amd_pstate_ut_check_freq()
218 		if (cpudata->boost_supported) {  in amd_pstate_ut_check_freq()
219 			if ((policy->max != policy->cpuinfo.max_freq) &&  in amd_pstate_ut_check_freq()
220 			    (policy->max != cpudata->nominal_freq)) {  in amd_pstate_ut_check_freq()
221 				pr_err("%s cpu%d policy_max=%d should be equal cpu_max=%d or cpu_nominal=%d !\n",  in amd_pstate_ut_check_freq()
222 					__func__, cpu, policy->max, policy->cpuinfo.max_freq,  in amd_pstate_ut_check_freq()
223 					cpudata->nominal_freq);  in amd_pstate_ut_check_freq()
224 				return -EINVAL;  in amd_pstate_ut_check_freq()
227 			pr_err("%s cpu%d must support boost!\n", __func__, cpu);  in amd_pstate_ut_check_freq()
228 			return -EINVAL;  in amd_pstate_ut_check_freq()
239 	pr_debug("->setting mode to %s\n", mode_str);  in amd_pstate_set_mode()
265 		pr_warn("%s: failed to update status for %s->%s: %d\n", __func__,  in amd_pstate_ut_check_driver()
281 			pr_err("%-4d %-20s\t fail: %d!\n", i+1, amd_pstate_ut_cases[i].name, ret);  in amd_pstate_ut_init()
283 			pr_info("%-4d %-20s\t success!\n", i+1, amd_pstate_ut_cases[i].name);  in amd_pstate_ut_init()
297 MODULE_DESCRIPTION("AMD P-state driver Test module");