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[2620:137:e000::1:20]) by mx.google.com with ESMTP id sb22-20020a170906edd600b008cc61e96e76si26016174ejb.148.2023.03.27.05.13.14; Mon, 27 Mar 2023 05:13:38 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229525AbjC0MAV (ORCPT + 99 others); Mon, 27 Mar 2023 08:00:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232574AbjC0MAT (ORCPT ); Mon, 27 Mar 2023 08:00:19 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 1BB2D1BE2 for ; Mon, 27 Mar 2023 05:00:19 -0700 (PDT) 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 1154D4B3; Mon, 27 Mar 2023 05:01:03 -0700 (PDT) Received: from pierre123.arm.com (unknown [10.57.19.133]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 5897D3F663; Mon, 27 Mar 2023 05:00:16 -0700 (PDT) From: Pierre Gondois To: linux-kernel@vger.kernel.org Cc: Radu Rendec , Pierre Gondois , Catalin Marinas , Will Deacon , Greg Kroah-Hartman , "Rafael J. Wysocki" , Sudeep Holla , Jeremy Linton , Akihiko Odaki , Palmer Dabbelt , Gavin Shan , linux-arm-kernel@lists.infradead.org Subject: [PATCH 0/3] cacheinfo: Correctly fallback to using clidr_el1's information Date: Mon, 27 Mar 2023 13:59:48 +0200 Message-Id: <20230327115953.788244-1-pierre.gondois@arm.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Spam-Status: No, score=-2.3 required=5.0 tests=RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1761522974552800706?= X-GMAIL-MSGID: =?utf-8?q?1761522974552800706?= The cache information can be extracted from either a Device Tree (DT), the PPTT ACPI table, or arch registers (clidr_el1 for arm64). When the DT is used but no cache properties are advertised, the current code doesn't correctly fallback to using arch information. Correct this. Also use the assumption that L1 data/instruction caches are private and L2/higher caches are shared when the cache information is coming form clidr_el1. Pierre Gondois (3): cacheinfo: Check sib_leaf in cache_leaves_are_shared() cacheinfo: Check cache properties are present in DT cacheinfo: Add use_arch[|_cache]_info field/function arch/arm64/kernel/cacheinfo.c | 5 ++++ drivers/base/cacheinfo.c | 53 ++++++++++++++++++++++++++++++++--- include/linux/cacheinfo.h | 2 ++ 3 files changed, 56 insertions(+), 4 deletions(-)