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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 EB47CC432C3 for ; Fri, 15 Nov 2019 17:33:07 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C05DE2073B for ; Fri, 15 Nov 2019 17:33:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="d4mDBS2Q" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C05DE2073B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=buf9Q+qZ1J9ESVkezhZQuj07sGbdEd/gQPTr9LXsBa8=; b=d4mDBS2Qj7xZhP 4CNbXuuxFdVzqF9qFTOExddAToyNXsLKtwtl8pK9sIoaBESyqpKK6SM+gbNigvywvhAwsi1NsVRXq 80URkTD5ijwJ4iDOIo/lw7ALWdf4f++oYTvciR3T3EGEBj5FYBY2RwyPjiZqhY/dg0zZDCb7vGiUc FP+p2f5Ly7k1fEMSNPjOLQwRdYTRRqNh/PajyEztfu3quvQicRSxCGC9n68ENYWFoiPVeDLA2MlGq HAUfdjYOKSyeWwg2CS3Sa8XYDNA/8S0qfXpS6OVMipCxYl5lwxf8utNoC5nPgF5VQHA4Ro6bY2h4P v+2vvkgEQc9F3UpOChuQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iVfSz-0003j6-98; Fri, 15 Nov 2019 17:33:05 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iVfSw-0003ii-58 for linux-arm-kernel@lists.infradead.org; Fri, 15 Nov 2019 17:33:03 +0000 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 5FA2C31B; Fri, 15 Nov 2019 09:33:01 -0800 (PST) Received: from bogus (e107155-lin.cambridge.arm.com [10.1.196.42]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 78B203F6C4; Fri, 15 Nov 2019 09:32:59 -0800 (PST) Date: Fri, 15 Nov 2019 17:32:57 +0000 From: Sudeep Holla To: Ulf Hansson Subject: Re: [PATCH v2 11/13] cpuidle: psci: Manage runtime PM in the idle path Message-ID: <20191115173257.GF27170@bogus> References: <20191029164438.17012-1-ulf.hansson@linaro.org> <20191029164438.17012-12-ulf.hansson@linaro.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191029164438.17012-12-ulf.hansson@linaro.org> User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191115_093302_238239_ACBCA163 X-CRM114-Status: GOOD ( 12.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Lorenzo Pieralisi , linux-pm@vger.kernel.org, Stephen Boyd , linux-arm-msm@vger.kernel.org, Daniel Lezcano , "Rafael J . Wysocki" , Andy Gross , Lina Iyer , Bjorn Andersson , Kevin Hilman , Rob Herring , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Oct 29, 2019 at 05:44:36PM +0100, Ulf Hansson wrote: > In case we have succeeded to attach a CPU to its PM domain, let's deploy > runtime PM support for the corresponding attached device, to allow the CPU > to be powered-managed accordingly. > > To set the triggering point for when runtime PM reference counting should > be done, let's store the index of deepest idle state for the CPU in the per > CPU struct. Then use this index to compare the selected idle state index > when entering idle, as to understand whether runtime PM reference counting > is needed or not. > > Note that, from the hierarchical point view, there may be good reasons to > do runtime PM reference counting even on shallower idle states, but at this > point this isn't supported, mainly due to limitations set by the generic PM > domain. > Looks much better now with psci_enter_domain_state split as separate. -- Regards, Sudeep _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel