From patchwork Tue Jun 21 19:20:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 12889665 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 37C19C43334 for ; Tue, 21 Jun 2022 19:34:48 +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:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=31h2YAh/bTjIB4cBkzncwUvH9rEvJTR4DitlUAiMwXw=; b=Bmk26NyeWLXj7J Iy7x4O/6Nx9h/oRfOHAAI2JRmRmigswuw7NrT+JqwlfSJstNluT4pNRw02ZnEEGUD31OQSMGkkxUS rk7I+rbNDWedvjQDC9xEm6067/VOkHWeOtDGhzV5SYIkouNVYrjfIrC7BeiO/sR/AD18vFLJqmDTM clNeWFuwHTK8DNwQkXq6YW+FI+QwOG3fnkuGvaCgrjMvSNieh3EkwtjdKflv+txoeF27RMd58fPIH jO4Klsiq13og363cnEXq1yhjypAYuGB6m6g4RQDWBzl4BaC6KkzXVXAX1n/lQHqH8HUzY/q1EftjJ yCBd39vlVkO2OFjIGPWw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o3jd7-006uqz-3p; Tue, 21 Jun 2022 19:33:41 +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 1o3jRI-006oGW-O5; Tue, 21 Jun 2022 19:21:30 +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 D02F1168F; Tue, 21 Jun 2022 12:21:27 -0700 (PDT) Received: from usa.arm.com (e103737-lin.cambridge.arm.com [10.1.197.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id DB2C93F792; Tue, 21 Jun 2022 12:21:25 -0700 (PDT) From: Sudeep Holla To: linux-kernel@vger.kernel.org, Greg KH Cc: Sudeep Holla , Atish Patra , Atish Patra , Vincent Guittot , Dietmar Eggemann , Qing Wang , Rob Herring , "Rafael J . Wysocki" , Ionela Voinescu , Pierre Gondois , linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org Subject: [PATCH v4 20/20] arch_topology: Warn that topology for nested clusters is not supported Date: Tue, 21 Jun 2022 20:20:34 +0100 Message-Id: <20220621192034.3332546-21-sudeep.holla@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220621192034.3332546-1-sudeep.holla@arm.com> References: <20220621192034.3332546-1-sudeep.holla@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220621_122128_855024_3E760910 X-CRM114-Status: GOOD ( 10.01 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org We don't support the topology for clusters of CPU clusters while the DT and ACPI bindings theoritcally support the same. Just warn about the same so that it is clear to the users of arch_topology that the nested clusters are not yet supported. Signed-off-by: Sudeep Holla --- drivers/base/arch_topology.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index ed1cb64a95aa..1c5fa7bbbd00 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -567,6 +567,8 @@ static int __init parse_cluster(struct device_node *cluster, int package_id, if (c) { leaf = false; ret = parse_cluster(c, package_id, i, depth + 1); + if (depth > 1) + pr_warn("Topology for clusters of clusters not yet supported\n"); of_node_put(c); if (ret != 0) return ret;