From patchwork Fri Nov 28 03:36:15 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ethan zhao X-Patchwork-Id: 5401211 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 11090BEEA8 for ; Fri, 28 Nov 2014 03:38:05 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0D0A92013A for ; Fri, 28 Nov 2014 03:38:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 14CE02012E for ; Fri, 28 Nov 2014 03:38:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751262AbaK1Dg5 (ORCPT ); Thu, 27 Nov 2014 22:36:57 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:31516 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751252AbaK1Dgy (ORCPT ); Thu, 27 Nov 2014 22:36:54 -0500 Received: from acsinet21.oracle.com (acsinet21.oracle.com [141.146.126.237]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id sAS3al5v027861 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 28 Nov 2014 03:36:48 GMT Received: from aserz7022.oracle.com (aserz7022.oracle.com [141.146.126.231]) by acsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id sAS3akAW026388 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL); Fri, 28 Nov 2014 03:36:47 GMT Received: from abhmp0004.oracle.com (abhmp0004.oracle.com [141.146.116.10]) by aserz7022.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id sAS3akYW016458; Fri, 28 Nov 2014 03:36:46 GMT Received: from localhost.localdomain.com (/10.182.70.25) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 27 Nov 2014 19:36:46 -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 , Dirk Brandewie Subject: [PATCH 1/2 V4] intel_pstate: skip this driver if Sun server has _PPC method Date: Fri, 28 Nov 2014 12:36:15 +0900 Message-Id: <1417145777-21897-2-git-send-email-ethan.zhao@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1417145777-21897-1-git-send-email-ethan.zhao@oracle.com> References: <1417145777-21897-1-git-send-email-ethan.zhao@oracle.com> X-Source-IP: acsinet21.oracle.com [141.146.126.237] 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 Signed-off-by: Dirk Brandewie Tested-by: Linda Knippers --- v2: fix break HP Proliant issue. v3: expand the hardware vendor list. v4: refine code. drivers/cpufreq/intel_pstate.c | 45 ++++++++++++++++++++++++++++++++++++++---- 1 file changed, 41 insertions(+), 4 deletions(-) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 27bb6d3..1bb62ca 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -943,15 +943,46 @@ 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; +} + +enum { + PSS, + PCC, +}; + struct hw_vendor_info { u16 valid; char oem_id[ACPI_OEM_ID_SIZE]; char oem_table_id[ACPI_OEM_TABLE_ID_SIZE]; + int oem_pwr_table; }; /* Hardware vendor-specific info that has its own power management modes */ static struct hw_vendor_info vendor_info[] = { - {1, "HP ", "ProLiant"}, + {1, "HP ", "ProLiant", PSS}, + {1, "ORACLE", "X4-2 ", PCC}, + {1, "ORACLE", "X4-2L ", PCC}, + {1, "ORACLE", "X4-2B ", PCC}, + {1, "ORACLE", "X3-2 ", PCC}, + {1, "ORACLE", "X3-2L ", PCC}, + {1, "ORACLE", "X3-2B ", PCC}, + {1, "ORACLE", "X4470M2 ", PCC}, + {1, "ORACLE", "X4270M3 ", PCC}, + {1, "ORACLE", "X4270M2 ", PCC}, + {1, "ORACLE", "X4170M2 ", PCC}, {0, "", ""}, }; @@ -966,15 +997,21 @@ static bool intel_pstate_platform_pwr_mgmt_exists(void) for (v_info = vendor_info; v_info->valid; v_info++) { if (!strncmp(hdr.oem_id, v_info->oem_id, ACPI_OEM_ID_SIZE) && - !strncmp(hdr.oem_table_id, v_info->oem_table_id, ACPI_OEM_TABLE_ID_SIZE) && - intel_pstate_no_acpi_pss()) - return true; + !strncmp(hdr.oem_table_id, v_info->oem_table_id, + ACPI_OEM_TABLE_ID_SIZE)) + switch (v_info->oem_pwr_table) { + case PSS: + return intel_pstate_no_acpi_pss(); + case PCC: + return intel_pstate_has_acpi_ppc(); + } } 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)