MSR_AMD_CPPC_REQUEST
error = rdmsr_safe(MSR_AMD_CPPC_REQUEST, &data->req);
error = rdmsr_safe(MSR_AMD_CPPC_REQUEST, &val);
error = wrmsr_safe(MSR_AMD_CPPC_REQUEST, new_req);
error = wrmsr_safe(MSR_AMD_CPPC_REQUEST, data->request);