211  *			(EPP) or energy performance bias (EPB),
213  * @epp_policy:		Last saved policy used to set EPP/EPB
635 	s16 epp;  in intel_pstate_get_epp()  local
640 		 * MSR_HWP_REQUEST, so need to read and get EPP.  in intel_pstate_get_epp()
643 			epp = rdmsrl_on_cpu(cpu_data->cpu, MSR_HWP_REQUEST,  in intel_pstate_get_epp()
645 			if (epp)  in intel_pstate_get_epp()
646 				return epp;  in intel_pstate_get_epp()
648 		epp = (hwp_req_data >> 24) & 0xff;  in intel_pstate_get_epp()
650 		/* When there is no EPP present, HWP uses EPB settings */  in intel_pstate_get_epp()
651 		epp = intel_pstate_get_epb(cpu_data);  in intel_pstate_get_epp()
654 	return epp;  in intel_pstate_get_epp()
676  * EPP/EPB display strings corresponding to EPP index in the
713 	s16 epp;  in intel_pstate_get_energy_pref_index()  local
717 	epp = intel_pstate_get_epp(cpu_data, 0);  in intel_pstate_get_energy_pref_index()
718 	if (epp < 0)  in intel_pstate_get_energy_pref_index()
719 		return epp;  in intel_pstate_get_energy_pref_index()
722 		if (epp == epp_values[EPP_INDEX_PERFORMANCE])  in intel_pstate_get_energy_pref_index()
724 		if (epp == epp_values[EPP_INDEX_BALANCE_PERFORMANCE])  in intel_pstate_get_energy_pref_index()
726 		if (epp == epp_values[EPP_INDEX_BALANCE_POWERSAVE])  in intel_pstate_get_energy_pref_index()
728 		if (epp == epp_values[EPP_INDEX_POWERSAVE])  in intel_pstate_get_energy_pref_index()
730 		*raw_epp = epp;  in intel_pstate_get_energy_pref_index()
743 		index = (epp >> 2) + 1;  in intel_pstate_get_energy_pref_index()
749 static int intel_pstate_set_epp(struct cpudata *cpu, u32 epp)  in intel_pstate_set_epp()  argument
761 	value |= (u64)epp << 24;  in intel_pstate_set_epp()
770 		cpu->epp_cached = epp;  in intel_pstate_set_epp()
779 	int epp = -EINVAL;  in intel_pstate_set_energy_pref_index()  local
783 		epp = cpu_data->epp_default;  in intel_pstate_set_energy_pref_index()
787 			epp = raw_epp;  in intel_pstate_set_energy_pref_index()
788 		else if (epp == -EINVAL)  in intel_pstate_set_energy_pref_index()
789 			epp = epp_values[pref_index];  in intel_pstate_set_energy_pref_index()
792 		 * To avoid confusion, refuse to set EPP to any values different  in intel_pstate_set_energy_pref_index()
796 		if (epp > 0 && cpu_data->policy == CPUFREQ_POLICY_PERFORMANCE)  in intel_pstate_set_energy_pref_index()
799 		ret = intel_pstate_set_epp(cpu_data, epp);  in intel_pstate_set_energy_pref_index()
801 		if (epp == -EINVAL)  in intel_pstate_set_energy_pref_index()
802 			epp = (pref_index - 1) << 2;  in intel_pstate_set_energy_pref_index()
803 		ret = intel_pstate_set_epb(cpu_data->cpu, epp);  in intel_pstate_set_energy_pref_index()
834 	u32 epp = 0;  in store_energy_performance_preference()  local
845 		ret = kstrtouint(buf, 10, &epp);  in store_energy_performance_preference()
849 		if (epp > 255)  in store_energy_performance_preference()
866 		ret = intel_pstate_set_energy_pref_index(cpu, ret, raw, epp);  in store_energy_performance_preference()
870 		 * target CPU before the EPP update and restarted after it,  in store_energy_performance_preference()
875 			epp = ret ? epp_values[ret] : cpu->epp_default;  in store_energy_performance_preference()
877 		if (cpu->epp_cached != epp) {  in store_energy_performance_preference()
881 			ret = intel_pstate_set_epp(cpu, epp);  in store_energy_performance_preference()
1160 	s16 epp;  in intel_pstate_hwp_set()  local
1182 		epp = intel_pstate_get_epp(cpu_data, value);  in intel_pstate_hwp_set()
1183 		cpu_data->epp_powersave = epp;  in intel_pstate_hwp_set()
1184 		/* If EPP read was failed, then don't try to write */  in intel_pstate_hwp_set()
1185 		if (epp < 0)  in intel_pstate_hwp_set()
1188 		epp = 0;  in intel_pstate_hwp_set()
1190 		/* skip setting EPP, when saved value is invalid */  in intel_pstate_hwp_set()
1195 		 * No need to restore EPP when it is not zero. This  in intel_pstate_hwp_set()
1201 		epp = intel_pstate_get_epp(cpu_data, value);  in intel_pstate_hwp_set()
1202 		if (epp)  in intel_pstate_hwp_set()
1205 		epp = cpu_data->epp_powersave;  in intel_pstate_hwp_set()
1209 		value |= (u64)epp << 24;  in intel_pstate_hwp_set()
1211 		intel_pstate_set_epb(cpu, epp);  in intel_pstate_hwp_set()
1229 		 * In case the EPP has been set to "performance" by the  in intel_pstate_hwp_offline()
1231 		 * temporary value with the cached EPP one.  in intel_pstate_hwp_offline()
1236 		 * However, make sure that EPP will be set to "performance" when  in intel_pstate_hwp_offline()
1258 	/* Set EPP to min */  in intel_pstate_hwp_offline()
1950 	 * If the EPP is set by firmware, which means that firmware enabled HWP  in intel_pstate_update_epp_defaults()
1951 	 * - Is equal or less than 0x80 (default balance_perf EPP)  in intel_pstate_update_epp_defaults()
1952 	 * - But less performance oriented than performance EPP  in intel_pstate_update_epp_defaults()
1953 	 *   then use this as new balance_perf EPP.  in intel_pstate_update_epp_defaults()
1963 	 * EPP return.  in intel_pstate_update_epp_defaults()
1970 	 * and default EPP.  in intel_pstate_update_epp_defaults()
3656 	 * Set EPP value as 102, this is the max suggested EPP
3712 		 * Avoid enabling HWP for processors without EPP support,  in intel_pstate_init()