217  *			(EPP) or energy performance bias (EPB),
219  * @epp_policy:		Last saved policy used to set EPP/EPB
526 	s16 epp;  in intel_pstate_get_epp()  local
531 		 * MSR_HWP_REQUEST, so need to read and get EPP.  in intel_pstate_get_epp()
534 			epp = rdmsrl_on_cpu(cpu_data->cpu, MSR_HWP_REQUEST,  in intel_pstate_get_epp()
536 			if (epp)  in intel_pstate_get_epp()
537 				return epp;  in intel_pstate_get_epp()
539 		epp = (hwp_req_data >> 24) & 0xff;  in intel_pstate_get_epp()
541 		/* When there is no EPP present, HWP uses EPB settings */  in intel_pstate_get_epp()
542 		epp = intel_pstate_get_epb(cpu_data);  in intel_pstate_get_epp()
545 	return epp;  in intel_pstate_get_epp()
567  * EPP/EPB display strings corresponding to EPP index in the
594 	s16 epp;  in intel_pstate_get_energy_pref_index()  local
598 	epp = intel_pstate_get_epp(cpu_data, 0);  in intel_pstate_get_energy_pref_index()
599 	if (epp < 0)  in intel_pstate_get_energy_pref_index()
600 		return epp;  in intel_pstate_get_energy_pref_index()
603 		if (epp == HWP_EPP_PERFORMANCE)  in intel_pstate_get_energy_pref_index()
605 		if (epp == HWP_EPP_BALANCE_PERFORMANCE)  in intel_pstate_get_energy_pref_index()
607 		if (epp == HWP_EPP_BALANCE_POWERSAVE)  in intel_pstate_get_energy_pref_index()
609 		if (epp == HWP_EPP_POWERSAVE)  in intel_pstate_get_energy_pref_index()
611 		*raw_epp = epp;  in intel_pstate_get_energy_pref_index()
624 		index = (epp >> 2) + 1;  in intel_pstate_get_energy_pref_index()
630 static int intel_pstate_set_epp(struct cpudata *cpu, u32 epp)  in intel_pstate_set_epp()  argument
642 	value |= (u64)epp << 24;  in intel_pstate_set_epp()
651 		cpu->epp_cached = epp;  in intel_pstate_set_epp()
660 	int epp = -EINVAL;  in intel_pstate_set_energy_pref_index()  local
664 		epp = cpu_data->epp_default;  in intel_pstate_set_energy_pref_index()
668 			epp = raw_epp;  in intel_pstate_set_energy_pref_index()
669 		else if (epp == -EINVAL)  in intel_pstate_set_energy_pref_index()
670 			epp = epp_values[pref_index - 1];  in intel_pstate_set_energy_pref_index()
673 		 * To avoid confusion, refuse to set EPP to any values different  in intel_pstate_set_energy_pref_index()
677 		if (epp > 0 && cpu_data->policy == CPUFREQ_POLICY_PERFORMANCE)  in intel_pstate_set_energy_pref_index()
680 		ret = intel_pstate_set_epp(cpu_data, epp);  in intel_pstate_set_energy_pref_index()
682 		if (epp == -EINVAL)  in intel_pstate_set_energy_pref_index()
683 			epp = (pref_index - 1) << 2;  in intel_pstate_set_energy_pref_index()
684 		ret = intel_pstate_set_epb(cpu_data->cpu, epp);  in intel_pstate_set_energy_pref_index()
715 	u32 epp = 0;  in store_energy_performance_preference()  local
726 		ret = kstrtouint(buf, 10, &epp);  in store_energy_performance_preference()
730 		if (epp > 255)  in store_energy_performance_preference()
747 		ret = intel_pstate_set_energy_pref_index(cpu, ret, raw, epp);  in store_energy_performance_preference()
751 		 * target CPU before the EPP update and restarted after it,  in store_energy_performance_preference()
756 			epp = ret ? epp_values[ret - 1] : cpu->epp_default;  in store_energy_performance_preference()
758 		if (cpu->epp_cached != epp) {  in store_energy_performance_preference()
762 			ret = intel_pstate_set_epp(cpu, epp);  in store_energy_performance_preference()
840 	s16 epp;  in intel_pstate_hwp_set()  local
862 		epp = intel_pstate_get_epp(cpu_data, value);  in intel_pstate_hwp_set()
863 		cpu_data->epp_powersave = epp;  in intel_pstate_hwp_set()
864 		/* If EPP read was failed, then don't try to write */  in intel_pstate_hwp_set()
865 		if (epp < 0)  in intel_pstate_hwp_set()
868 		epp = 0;  in intel_pstate_hwp_set()
870 		/* skip setting EPP, when saved value is invalid */  in intel_pstate_hwp_set()
875 		 * No need to restore EPP when it is not zero. This  in intel_pstate_hwp_set()
881 		epp = intel_pstate_get_epp(cpu_data, value);  in intel_pstate_hwp_set()
882 		if (epp)  in intel_pstate_hwp_set()
885 		epp = cpu_data->epp_powersave;  in intel_pstate_hwp_set()
889 		value |= (u64)epp << 24;  in intel_pstate_hwp_set()
891 		intel_pstate_set_epb(cpu, epp);  in intel_pstate_hwp_set()
905 		 * In case the EPP has been set to "performance" by the  in intel_pstate_hwp_offline()
907 		 * temporary value with the cached EPP one.  in intel_pstate_hwp_offline()
921 	/* Set EPP to min */  in intel_pstate_hwp_offline()
3037 		 * Avoid enabling HWP for processors without EPP support,  in intel_pstate_init()