From patchwork Mon Nov 24 07:50:58 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ethan zhao X-Patchwork-Id: 5363791 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id C26E19F2F5 for ; Mon, 24 Nov 2014 07:52:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F28DD20375 for ; Mon, 24 Nov 2014 07:52:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 23096202FF for ; Mon, 24 Nov 2014 07:52:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752824AbaKXHwZ (ORCPT ); Mon, 24 Nov 2014 02:52:25 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:22624 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752176AbaKXHwY (ORCPT ); Mon, 24 Nov 2014 02:52:24 -0500 Received: from ucsinet22.oracle.com (ucsinet22.oracle.com [156.151.31.94]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id sAO7qDoG009281 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 24 Nov 2014 07:52:13 GMT Received: from aserz7022.oracle.com (aserz7022.oracle.com [141.146.126.231]) by ucsinet22.oracle.com (8.14.5+Sun/8.14.5) with ESMTP id sAO7qCmO027618 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL); Mon, 24 Nov 2014 07:52:13 GMT Received: from abhmp0007.oracle.com (abhmp0007.oracle.com [141.146.116.13]) by aserz7022.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id sAO7qCeN029140; Mon, 24 Nov 2014 07:52:12 GMT Received: from localhost.localdomain.com (/10.182.70.25) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sun, 23 Nov 2014 23:52:11 -0800 From: Ethan Zhao To: linda.knippers@hp.com, viresh.kumar@linaro.org, rjw@rjwysocki.net, corbet@lwn.net, dirk.j.brandewie@intel.com Cc: linux-doc@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, ethan.kernel@gmail.com, Ethan Zhao Subject: [PATCH 2/2 v2] intel_pstate: add kernel parameter to enable loading on Sun X86 servers. Date: Mon, 24 Nov 2014 16:50:58 +0900 Message-Id: <1416815458-25312-3-git-send-email-ethan.zhao@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1416815458-25312-1-git-send-email-ethan.zhao@oracle.com> References: <1416815458-25312-1-git-send-email-ethan.zhao@oracle.com> X-Source-IP: ucsinet22.oracle.com [156.151.31.94] Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP To force loading on Oracle Sun X86 servers, provide one kernel command line parameter intel_pstate = onora For those who be aware of the risk doing so. Signed-off-by: Ethan Zhao v2: change the command line parameter naming to specific to Oracle Sun servers. --- Documentation/kernel-parameters.txt | 3 +++ drivers/cpufreq/intel_pstate.c | 6 +++++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 479f332..e4b1b81 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1446,6 +1446,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted. disable Do not enable intel_pstate as the default scaling driver for the supported processors + onora + Enable loading intel_pstate on Oracle Sun Servers(X86). + only for those who be aware of the risk. intremap= [X86-64, Intel-IOMMU] on enable Interrupt Remapping (default) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index dacc15a..f28c725 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -866,6 +866,7 @@ static struct cpufreq_driver intel_pstate_driver = { }; static int __initdata no_load; +static unsigned int load_on_sun; static int intel_pstate_msrs_not_valid(void) { @@ -987,7 +988,8 @@ static bool intel_pstate_platform_pwr_mgmt_exists(void) return true; } if (!strncmp(hdr.oem_id, vendor_info[1].oem_id, ACPI_OEM_ID_SIZE) && - intel_pstate_has_acpi_ppc()) + intel_pstate_has_acpi_ppc() && + !load_on_sun) return true; return false; @@ -1061,6 +1063,8 @@ static int __init intel_pstate_setup(char *str) if (!strcmp(str, "disable")) no_load = 1; + if (!strcmp(str, "onora")) + load_on_sun = 1; return 0; } early_param("intel_pstate", intel_pstate_setup);