From patchwork Thu Jul 8 10:09:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Donnefort X-Patchwork-Id: 471613 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=-17.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, 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 B403EC07E99 for ; Thu, 8 Jul 2021 10:09:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8DD6061009 for ; Thu, 8 Jul 2021 10:09:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231460AbhGHKMH (ORCPT ); Thu, 8 Jul 2021 06:12:07 -0400 Received: from foss.arm.com ([217.140.110.172]:55324 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231324AbhGHKMH (ORCPT ); Thu, 8 Jul 2021 06:12:07 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 949B711D4; Thu, 8 Jul 2021 03:09:25 -0700 (PDT) Received: from e120877-lin.cambridge.arm.com (e120877-lin.cambridge.arm.com [10.1.194.43]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 1C9113F5A1; Thu, 8 Jul 2021 03:09:24 -0700 (PDT) From: Vincent Donnefort To: peterz@infradead.org, rjw@rjwysocki.net, viresh.kumar@linaro.org, vincent.guittot@linaro.org, qperret@google.com Cc: linux-pm@vger.kernel.org, ionela.voinescu@arm.com, lukasz.luba@arm.com, dietmar.eggemann@arm.com, mka@chromium.org, Vincent Donnefort Subject: [PATCH v4 3/9] PM / EM: Extend em_perf_domain with a flag field Date: Thu, 8 Jul 2021 11:09:00 +0100 Message-Id: <1625738946-295849-4-git-send-email-vincent.donnefort@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1625738946-295849-1-git-send-email-vincent.donnefort@arm.com> References: <1625738946-295849-1-git-send-email-vincent.donnefort@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Merge the current "milliwatts" option into a "flag" field. This intends to prepare the extension of this structure for inefficient states support in the Energy Model. Signed-off-by: Vincent Donnefort Reviewed-by: Lukasz Luba diff --git a/include/linux/energy_model.h b/include/linux/energy_model.h index 7ca4f9cc8baf..1deb727245be 100644 --- a/include/linux/energy_model.h +++ b/include/linux/energy_model.h @@ -40,8 +40,7 @@ struct em_perf_state { * em_perf_domain - Performance domain * @table: List of performance states, in ascending order * @nr_perf_states: Number of performance states - * @milliwatts: Flag indicating the power values are in milli-Watts - * or some other scale. + * @flags: See "em_perf_domain flags" * @cpus: Cpumask covering the CPUs of the domain. It's here * for performance reasons to avoid potential cache * misses during energy calculations in the scheduler @@ -56,10 +55,18 @@ struct em_perf_state { struct em_perf_domain { struct em_perf_state *table; int nr_perf_states; - int milliwatts; + unsigned long flags; unsigned long cpus[]; }; +/* + * em_perf_domain flags: + * + * EM_PERF_DOMAIN_MILLIWATTS: The power values are in milli-Watts or some + * other scale. + */ +#define EM_PERF_DOMAIN_MILLIWATTS BIT(0) + #define em_span_cpus(em) (to_cpumask((em)->cpus)) #ifdef CONFIG_ENERGY_MODEL diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c index 30ab73ab6439..3ab0b913bcfa 100644 --- a/kernel/power/energy_model.c +++ b/kernel/power/energy_model.c @@ -56,7 +56,8 @@ DEFINE_SHOW_ATTRIBUTE(em_debug_cpus); static int em_debug_units_show(struct seq_file *s, void *unused) { struct em_perf_domain *pd = s->private; - char *units = pd->milliwatts ? "milliWatts" : "bogoWatts"; + char *units = (pd->flags & EM_PERF_DOMAIN_MILLIWATTS) ? + "milliWatts" : "bogoWatts"; seq_printf(s, "%s\n", units); @@ -343,7 +344,8 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states, if (ret) goto unlock; - dev->em_pd->milliwatts = milliwatts; + if (milliwatts) + dev->em_pd->flags |= EM_PERF_DOMAIN_MILLIWATTS; em_debug_create_pd(dev); dev_info(dev, "EM: created perf domain\n");