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=-0.8 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 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 389B9C43613 for ; Thu, 20 Jun 2019 17:00:56 +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 0D2BA20656 for ; Thu, 20 Jun 2019 17:00:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="L+1IfCId" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0D2BA20656 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-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=uxfRYtk1AJofkbsZzXlD89Wz9bIywbiXXpdOKpUU+lk=; b=L+1IfCIdsqx75FHBH6/vORr22 zhFIzWpc8Rk1tvJS5pa9gz5eCg7NKD+ors0L9UBwck+ANT/xQ8MzTgtopnS2H2Hp3uDpYRKYNFBuc VeYsmX0+RqudsWtakXJigqgemSK+h7ww/S7Nrcnhd/oevSre/c7hD+yVs/lU1AtNIPWxwY+kDGaLA 5rhB2o1IPiHNZ2uR4xdVQK+JMozoQaGz9PxxValvMlpEn8EOlCIpzQdtysZcJJGE05nCMXIr4R50B K6z0cAwcRwi2SvrTT15vFs2Dodbw9krswtCeSOc3TlEZBFBr7JcdWZNWc2N3WGsvI8A6+GuWI9Rwm uRnPS9y7A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1he0Qh-0007bp-CD; Thu, 20 Jun 2019 17:00:55 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1he0Qe-0007bL-Ty for linux-arm-kernel@lists.infradead.org; Thu, 20 Jun 2019 17:00:54 +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 266F92B; Thu, 20 Jun 2019 10:00:51 -0700 (PDT) Received: from [10.1.196.93] (en101.cambridge.arm.com [10.1.196.93]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 151683F246; Thu, 20 Jun 2019 10:00:49 -0700 (PDT) Subject: Re: [PATCH v1 5/5] coresight: etm4x: save/restore state across CPU low power states To: andrew.murray@arm.com, mathieu.poirier@linaro.org References: <20190618125433.9739-6-andrew.murray@arm.com> <20190618132159.GA18121@e107155-lin> <15ef45d4-ee1a-3c45-878d-f08f0a84cfeb@arm.com> <20190619110749.GD1360@e107155-lin> <20190620114116.GE20984@e119886-lin.cambridge.arm.com> <20190620154154.GB25273@e107155-lin> <20190620163426.GC25273@e107155-lin> <20190620165427.GH20984@e119886-lin.cambridge.arm.com> From: Suzuki K Poulose Message-ID: <9adb65af-a898-462b-ecbc-af972d9331a6@arm.com> Date: Thu, 20 Jun 2019 18:00:48 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <20190620165427.GH20984@e119886-lin.cambridge.arm.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190620_100053_010425_770AF917 X-CRM114-Status: GOOD ( 12.26 ) 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: alexander.shishkin@linux.intel.com, mike.leach@linaro.org, Al.Grant@arm.com, linux-arm-kernel@lists.infradead.org, Sudeep.Holla@arm.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 20/06/2019 17:54, Andrew Murray wrote: > On Thu, Jun 20, 2019 at 10:47:38AM -0600, Mathieu Poirier wrote: >> On Thu, 20 Jun 2019 at 10:34, Sudeep Holla wrote: >>> >>> On Thu, Jun 20, 2019 at 10:14:04AM -0600, Mathieu Poirier wrote: >>>> On Thu, 20 Jun 2019 at 09:41, Sudeep Holla wrote: ... >> Then all we have to do is make the ACPI/DT property that indicate the >> method used to deal with tracer idling mandatory. That way people are >> conscious of the choice they are making. To be backward compatible >> with current systems we default to the TRCPDCR.PU method but print a >> warning message, just like we do for obsolete DT bindings. > > I'll respin the series based on this approach. I'll also flip the > 'disable_pm_save' module option to 'enable_pm_save' - thus allowing any > one to use software save/restore if they wish. If you are going to add a firmware property, please get a consensus on the name here, before respinning to avoid another churn :-). How about one of : "arm,coresight-etm-looses-state" "arm,coresight-etm-needs-save-restore" or something better long the line. Cheers Suzuki _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel