98  * AMD Energy Preference Performance (EPP)
99  * The EPP is used in the CCLK DPM controller to drive
101  * short periods of activity. EPP values will be utilized for
103  * display strings corresponding to EPP index in the
212 	u64 epp;  in shmem_get_epp()  local
215 	ret = cppc_get_epp_perf(cpudata->cpu, &epp);  in shmem_get_epp()
221 	return FIELD_GET(AMD_CPPC_EPP_PERF_MASK, epp);  in shmem_get_epp()
225 			   u8 des_perf, u8 max_perf, u8 epp, bool fast_switch)  in msr_update_perf()  argument
236 	value |= FIELD_PREP(AMD_CPPC_EPP_PERF_MASK, epp);  in msr_update_perf()
252 	WRITE_ONCE(cpudata->epp_cached, epp);  in msr_update_perf()
261 					  u8 max_perf, u8 epp,  in amd_pstate_update_perf()  argument
265 						   max_perf, epp, fast_switch);  in amd_pstate_update_perf()
268 static int msr_set_epp(struct amd_cpudata *cpudata, u8 epp)  in msr_set_epp()  argument
275 	value |= FIELD_PREP(AMD_CPPC_EPP_PERF_MASK, epp);  in msr_set_epp()
287 	WRITE_ONCE(cpudata->epp_cached, epp);  in msr_set_epp()
295 static inline int amd_pstate_set_epp(struct amd_cpudata *cpudata, u8 epp)  in amd_pstate_set_epp()  argument
297 	return static_call(amd_pstate_set_epp)(cpudata, epp);  in amd_pstate_set_epp()
300 static int shmem_set_epp(struct amd_cpudata *cpudata, u8 epp)  in shmem_set_epp()  argument
305 	if (epp == cpudata->epp_cached)  in shmem_set_epp()
308 	perf_ctrls.energy_perf = epp;  in shmem_set_epp()
314 	WRITE_ONCE(cpudata->epp_cached, epp);  in shmem_set_epp()
323 	u8 epp;  in amd_pstate_set_energy_pref_index()  local
326 		epp = cpudata->epp_default;  in amd_pstate_set_energy_pref_index()
328 		epp = epp_values[pref_index];  in amd_pstate_set_energy_pref_index()
330 	if (epp > 0 && cpudata->policy == CPUFREQ_POLICY_PERFORMANCE) {  in amd_pstate_set_energy_pref_index()
331 		pr_debug("EPP cannot be set under performance policy\n");  in amd_pstate_set_energy_pref_index()
337 					  epp,  in amd_pstate_set_energy_pref_index()
343 	return amd_pstate_set_epp(cpudata, epp);  in amd_pstate_set_energy_pref_index()
391 		/* Enable autonomous mode for EPP */  in shmem_cppc_enable()
393 			/* Set desired perf as zero to allow EPP firmware control */  in shmem_cppc_enable()
483 			     u8 des_perf, u8 max_perf, u8 epp, bool fast_switch)  in shmem_update_perf()  argument
488 		int ret = shmem_set_epp(cpudata, epp);  in shmem_update_perf()
1557 	u8 epp;  in amd_pstate_epp_update_limit()  local
1562 		epp = 0;  in amd_pstate_epp_update_limit()
1564 		epp = READ_ONCE(cpudata->epp_cached);  in amd_pstate_epp_update_limit()
1567 		trace_amd_pstate_epp_perf(cpudata->cpu, cpudata->highest_perf, epp,  in amd_pstate_epp_update_limit()
1574 				      cpudata->max_limit_perf, epp, false);  in amd_pstate_epp_update_limit()
1667 	/* avoid suspending when EPP is not enabled */  in amd_pstate_epp_suspend()
1728 	.name		= "amd-pstate-epp",