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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 1C09FC3F2D7 for ; Thu, 5 Mar 2020 22:45:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F3204206E6 for ; Thu, 5 Mar 2020 22:45:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726413AbgCEWps (ORCPT ); Thu, 5 Mar 2020 17:45:48 -0500 Received: from mga18.intel.com ([134.134.136.126]:5017 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726565AbgCEWpr (ORCPT ); Thu, 5 Mar 2020 17:45:47 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Mar 2020 14:45:47 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,519,1574150400"; d="scan'208";a="234674606" Received: from minkleyx-mobl1.amr.corp.intel.com (HELO spandruv-mobl.amr.corp.intel.com) ([10.252.207.66]) by fmsmga008.fm.intel.com with ESMTP; 05 Mar 2020 14:45:46 -0800 From: Srinivas Pandruvada To: andriy.shevchenko@linux.intel.com Cc: platform-driver-x86@vger.kernel.org, prarit@redhat.com, linux-kernel@vger.kernel.org, Srinivas Pandruvada Subject: [PATCH 05/27] tools/power/x86/intel-speed-select: Special handling for CPU 0 online/offline Date: Thu, 5 Mar 2020 14:45:16 -0800 Message-Id: <20200305224538.490864-6-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200305224538.490864-1-srinivas.pandruvada@linux.intel.com> References: <20200305224538.490864-1-srinivas.pandruvada@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When "-o" option for force online/offline is used with command: perf-profile set-config-level If the config level calls for CPU 0 online/offline, then call fails as there is special kernel setup required for CPU 0 online/offline and the currently not setup for that. But when call is for online CPU 0, then don't fail. Just warn that this system is not setup for CPU 0 online/offline. Signed-off-by: Srinivas Pandruvada --- tools/power/x86/intel-speed-select/isst-config.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c index 405b03cba248..b8f4846d7c78 100644 --- a/tools/power/x86/intel-speed-select/isst-config.c +++ b/tools/power/x86/intel-speed-select/isst-config.c @@ -220,8 +220,14 @@ static void set_cpu_online_offline(int cpu, int state) "/sys/devices/system/cpu/cpu%d/online", cpu); fd = open(buffer, O_WRONLY); - if (fd < 0) + if (fd < 0) { + if (!cpu && state) { + fprintf(stderr, "This system is not configured for CPU 0 online/offline\n"); + fprintf(stderr, "Ignoring online request for CPU 0 as this is already online\n"); + return; + } err(-1, "%s open failed", buffer); + } if (state) ret = write(fd, "1\n", 2); -- 2.24.1