From patchwork Sat Dec 5 00:08:38 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: srinivas pandruvada X-Patchwork-Id: 7773441 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 [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 66AB7BEEE1 for ; Sat, 5 Dec 2015 00:09:54 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8DCAF20489 for ; Sat, 5 Dec 2015 00:09:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 90844205E4 for ; Sat, 5 Dec 2015 00:09:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755569AbbLEAJu (ORCPT ); Fri, 4 Dec 2015 19:09:50 -0500 Received: from mga11.intel.com ([192.55.52.93]:50296 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755013AbbLEAJt (ORCPT ); Fri, 4 Dec 2015 19:09:49 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga102.fm.intel.com with ESMTP; 04 Dec 2015 16:09:48 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,382,1444719600"; d="scan'208";a="834636136" Received: from spandruv-desk3.jf.intel.com ([10.7.199.153]) by orsmga001.jf.intel.com with ESMTP; 04 Dec 2015 16:09:47 -0800 From: Srinivas Pandruvada To: rjw@rjwysocki.net, len.brown@intel.com, viresh.kumar@linaro.org Cc: linux-pm@vger.kernel.org, Srinivas Pandruvada Subject: [PATCH 4/4] cpufreq: intel_pstate: Add powersave policy support Date: Fri, 4 Dec 2015 16:08:38 -0800 Message-Id: <1449274118-15575-5-git-send-email-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1449274118-15575-1-git-send-email-srinivas.pandruvada@linux.intel.com> References: <1449274118-15575-1-git-send-email-srinivas.pandruvada@linux.intel.com> 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 Implement support for powersave policy. The powersave policy will limit the max performance to P-State = Maximum Efficiency Ratio. Signed-off-by: Srinivas Pandruvada --- drivers/cpufreq/intel_pstate.c | 49 ++++++++++++++++++++++++++++++++++-------- 1 file changed, 40 insertions(+), 9 deletions(-) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 61b7118..417d020 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -189,8 +189,23 @@ static struct perf_limits ondemand_limits = { .min_sysfs_pct = 0, }; -#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE +static struct perf_limits powersave_limits = { + .no_turbo = 1, + .turbo_disabled = 1, + .max_perf_pct = 0, + .max_perf = int_tofp(1), + .min_perf_pct = 0, + .min_perf = int_tofp(1), + .max_policy_pct = 0, + .max_sysfs_pct = 0, + .min_policy_pct = 0, + .min_sysfs_pct = 0, +}; + +#if defined(CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE) static struct perf_limits *limits = &performance_limits; +#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE) +static struct perf_limits *limits = &powersave_limits; #else static struct perf_limits *limits = &ondemand_limits; #endif @@ -1143,13 +1158,26 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy) return 0; } - pr_debug("intel_pstate: set ondemand\n"); - limits = &ondemand_limits; - limits->min_policy_pct = (policy->min * 100) / policy->cpuinfo.max_freq; - limits->min_policy_pct = clamp_t(int, limits->min_policy_pct, 0 , 100); - limits->max_policy_pct = DIV_ROUND_UP(policy->max * 100, - policy->cpuinfo.max_freq); - limits->max_policy_pct = clamp_t(int, limits->max_policy_pct, 0 , 100); + if (policy->policy == CPUFREQ_POLICY_POWERSAVE) { + pr_debug("intel_pstate: set powersave\n"); + limits = &powersave_limits; + limits->min_policy_pct = (policy->cpuinfo.min_freq * 100) / + policy->cpuinfo.max_freq; + limits->min_policy_pct = clamp_t(int, limits->min_policy_pct, + 0, 100); + limits->max_policy_pct = limits->min_policy_pct; + } else { + pr_debug("intel_pstate: set ondemand\n"); + limits = &ondemand_limits; + limits->min_policy_pct = (policy->min * 100) / + policy->cpuinfo.max_freq; + limits->min_policy_pct = clamp_t(int, limits->min_policy_pct, + 0, 100); + limits->max_policy_pct = DIV_ROUND_UP(policy->max * 100, + policy->cpuinfo.max_freq); + limits->max_policy_pct = clamp_t(int, limits->max_policy_pct, + 0, 100); + } /* Normalize user input to [min_policy_pct, max_policy_pct] */ limits->min_perf_pct = max(limits->min_policy_pct, @@ -1181,7 +1209,8 @@ static int intel_pstate_verify_policy(struct cpufreq_policy *policy) cpufreq_verify_within_cpu_limits(policy); if (policy->policy != CPUFREQ_POLICY_ONDEMAND && - policy->policy != CPUFREQ_POLICY_PERFORMANCE) + policy->policy != CPUFREQ_POLICY_PERFORMANCE && + policy->policy != CPUFREQ_POLICY_POWERSAVE) return -EINVAL; return 0; @@ -1234,6 +1263,8 @@ static int intel_pstate_available_policies(u8 *mask) { *mask = CPUFREQ_POLICY_PERFORMANCE | CPUFREQ_POLICY_ONDEMAND; + if (!hwp_active) + *mask |= CPUFREQ_POLICY_POWERSAVE; return 0; }