From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7874FC43381 for ; Thu, 28 Feb 2019 17:59:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5620320857 for ; Thu, 28 Feb 2019 17:59:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388369AbfB1R7F (ORCPT ); Thu, 28 Feb 2019 12:59:05 -0500 Received: from mga07.intel.com ([134.134.136.100]:62019 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726214AbfB1R7E (ORCPT ); Thu, 28 Feb 2019 12:59:04 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 28 Feb 2019 09:59:03 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,423,1544515200"; d="scan'208";a="147405164" Received: from chenyu-office.sh.intel.com ([10.239.158.163]) by fmsmga002.fm.intel.com with ESMTP; 28 Feb 2019 09:59:02 -0800 From: Chen Yu To: "Rafael J. Wysocki" , Viresh Kumar , Srinivas Pandruvada , Len Brown Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, yu.chen.surf@gmail.com, Chen Yu Subject: [PATCH 1/2][RFC v2] ACPI: add "processor.broadcast_ppc" hook to broadcast _PPC Date: Fri, 1 Mar 2019 02:07:47 +0800 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On some problematic platforms, the _PPC notifier is only delivered to one CPU, which might cause information inconsistent between CPUs within the package. Thus introduce a boot up parameter to broadcast this _PPC notifier onto all online CPUs. Signed-off-by: Chen Yu --- drivers/acpi/processor_perflib.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c index a303fd0e108c..737dbf5aa7f7 100644 --- a/drivers/acpi/processor_perflib.c +++ b/drivers/acpi/processor_perflib.c @@ -63,6 +63,10 @@ module_param(ignore_ppc, int, 0644); MODULE_PARM_DESC(ignore_ppc, "If the frequency of your machine gets wrongly" \ "limited by BIOS, this should help"); +static int broadcast_ppc; +module_param(broadcast_ppc, int, 0644); +MODULE_PARM_DESC(broadcast_ppc, "Broadcast the ppc to all online CPUs"); + #define PPC_REGISTERED 1 #define PPC_IN_USE 2 @@ -180,8 +184,16 @@ void acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag) else acpi_processor_ppc_ost(pr->handle, 0); } - if (ret >= 0) - cpufreq_update_policy(pr->id); + if (ret >= 0) { + if (broadcast_ppc) { + int cpu; + + for_each_possible_cpu(cpu) + cpufreq_update_policy(cpu); + } else { + cpufreq_update_policy(pr->id); + } + } } int acpi_processor_get_bios_limit(int cpu, unsigned int *limit) -- 2.17.1