AMD_CPPC_EPP_PERFORMANCE
ret = amd_pstate_set_epp(policy, AMD_CPPC_EPP_PERFORMANCE);
epp = AMD_CPPC_EPP_PERFORMANCE;
[EPP_INDEX_PERFORMANCE] = AMD_CPPC_EPP_PERFORMANCE,
case AMD_CPPC_EPP_PERFORMANCE:
cpudata->epp_default_ac = AMD_CPPC_EPP_PERFORMANCE;