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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id DFCA9C433EF for ; Mon, 25 Apr 2022 10:07:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc: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=OlyhI1CYC3HqEXeZ/fys7RaxoMblSQqyxhZmbbd13DQ=; b=Tl5OGTr55BM0RS 2Mt91Icb3uviuTkHJmJ62JVlhrlpK0HaWBBjK07hEhnNHQcYpp859sxr3gtqGav1SFT376lnjfGwC 0Js8tdk7O6iqHfsdCo2aCxTvVbs04jdF4svh86gzo8Y0H804dcoc1WcLoV7CwbQ4p/4Ntu4P/USQM SjlcOxCng1A152MWU5ML2QDDABEDgn9QivYnqEUvswdDcn+Pv9JVZwXohiKbL2DdHvYhtAZsFLClQ PPn5l0B3Mc50wKxzLzyeEuyQbuHdsf+k9hvzZ+QlEYBYmhG53gO24Ii8rDmnJKLeP6kUpWN7L0mFF ecaFlonUlu3BRttiy+YQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nivcO-0094qa-Tr; Mon, 25 Apr 2022 10:06:57 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nivcD-0094o7-7U for linux-arm-kernel@lists.infradead.org; Mon, 25 Apr 2022 10:06:54 +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 4831B1FB; Mon, 25 Apr 2022 03:06:42 -0700 (PDT) Received: from bogus (unknown [10.57.11.83]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 63E843F73B; Mon, 25 Apr 2022 03:06:40 -0700 (PDT) Date: Mon, 25 Apr 2022 11:06:35 +0100 From: Sudeep Holla To: Qing Wang Cc: Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org, Sudeep Holla , linux-kernel@vger.kernel.org, vincent.guittot@linaro.org, peterz@infradead.org, dietmar.eggemann@arm.com Subject: Re: [PATCH V2] arm64: add SCHED_CLUSTER's dependency on ACPI Message-ID: <20220425100635.ig4dxvlflglfagpx@bogus> References: <1650855303-91388-1-git-send-email-wangqing@vivo.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1650855303-91388-1-git-send-email-wangqing@vivo.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220425_030645_423683_3533FA51 X-CRM114-Status: GOOD ( 11.32 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, Apr 24, 2022 at 07:55:01PM -0700, Qing Wang wrote: > From: Wang Qing > > cluster sched_domain configured by cpu_topology[].cluster_sibling, > which is set by cluster_id, cluster_id can only get from ACPI. > > If the system does not enable ACPI, cluster_id is always -1, even enable > SCHED_CLUSTER is invalid, this is misleading. > > So we add SCHED_CLUSTER's dependency on ACPI here. > Any reason why this can't be extended to support DT based systems via cpu-map in the device tree. IMO we almost have everything w.r.t topology in DT and no reason to deviate this feature between ACPI and DT. -- Regards, Sudeep _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel