From patchwork Tue Nov 18 08:27:27 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ethan zhao X-Patchwork-Id: 5326301 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B16A7C11AC for ; Tue, 18 Nov 2014 08:30:50 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EBDEF2018E for ; Tue, 18 Nov 2014 08:30:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0411A20179 for ; Tue, 18 Nov 2014 08:30:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753402AbaKRIaZ (ORCPT ); Tue, 18 Nov 2014 03:30:25 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:32893 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753794AbaKRI2j (ORCPT ); Tue, 18 Nov 2014 03:28:39 -0500 Received: from acsinet22.oracle.com (acsinet22.oracle.com [141.146.126.238]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id sAI8SU0Q020173 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 18 Nov 2014 08:28:31 GMT Received: from userz7022.oracle.com (userz7022.oracle.com [156.151.31.86]) by acsinet22.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id sAI8STSK021287 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 18 Nov 2014 08:28:29 GMT Received: from abhmp0016.oracle.com (abhmp0016.oracle.com [141.146.116.22]) by userz7022.oracle.com (8.14.5+Sun/8.14.4) with ESMTP id sAI8SR9N019809; Tue, 18 Nov 2014 08:28:28 GMT Received: from localhost.localdomain.com (/10.182.70.25) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 18 Nov 2014 00:28:27 -0800 From: Ethan Zhao To: dirk.j.brandewie@intel.com, viresh.kumar@linaro.org, rjw@rjwysocki.net, corbet@lwn.net Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, ethan.kernel@gmail.com, joe.jin@oracle.com, brian.maly@oracle.com, Ethan Zhao Subject: [PATCH] intel_pstate: skip the driver if Sun server has ACPI _PPC method Date: Tue, 18 Nov 2014 17:27:27 +0900 Message-Id: <1416299253-14912-2-git-send-email-ethan.zhao@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1416299253-14912-1-git-send-email-ethan.zhao@oracle.com> References: <1416299253-14912-1-git-send-email-ethan.zhao@oracle.com> X-Source-IP: acsinet22.oracle.com [141.146.126.238] 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 Oracle Sun X86 servers have dynamic power capping capability that works via ACPI _PPC method etc, so skip loading this driver if Sun server has ACPI _PPC enabled. Signed-off-by: Ethan Zhao --- drivers/cpufreq/intel_pstate.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 27bb6d3..5498eb0 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -943,6 +943,21 @@ static bool intel_pstate_no_acpi_pss(void) return true; } +static bool intel_pstate_has_acpi_ppc(void) +{ + int i; + + for_each_possible_cpu(i) { + struct acpi_processor *pr = per_cpu(processors, i); + + if (!pr) + continue; + if (acpi_has_method(pr->handle, "_PPC")) + return true; + } + return false; +} + struct hw_vendor_info { u16 valid; char oem_id[ACPI_OEM_ID_SIZE]; @@ -952,6 +967,7 @@ struct hw_vendor_info { /* Hardware vendor-specific info that has its own power management modes */ static struct hw_vendor_info vendor_info[] = { {1, "HP ", "ProLiant"}, + {1, "ORACLE", ""}, {0, "", ""}, }; @@ -969,12 +985,16 @@ static bool intel_pstate_platform_pwr_mgmt_exists(void) !strncmp(hdr.oem_table_id, v_info->oem_table_id, ACPI_OEM_TABLE_ID_SIZE) && intel_pstate_no_acpi_pss()) return true; + if (!strncmp(hdr.oem_id, v_info->oem_id, ACPI_OEM_ID_SIZE) && + intel_pstate_has_acpi_ppc()) + return true; } return false; } #else /* CONFIG_ACPI not enabled */ static inline bool intel_pstate_platform_pwr_mgmt_exists(void) { return false; } +static inline bool intel_pstate_has_acpi_ppc(void) { return false; } #endif /* CONFIG_ACPI */ static int __init intel_pstate_init(void)