From patchwork Mon Jan 29 07:59:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: JeeHeng Sia X-Patchwork-Id: 193313 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7301:2087:b0:106:209c:c626 with SMTP id gs7csp418976dyb; Mon, 29 Jan 2024 00:01:05 -0800 (PST) X-Google-Smtp-Source: AGHT+IEscKFBRokot2hoXCp9qeFanYtm8ssfZ6ADSCPlCMy9fUGsXfxxV1C+e6/cj9hbqXlekN+i X-Received: by 2002:a05:6a20:3f95:b0:199:c8f1:58 with SMTP id ay21-20020a056a203f9500b00199c8f10058mr1759156pzb.41.1706515264972; Mon, 29 Jan 2024 00:01:04 -0800 (PST) Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [139.178.88.99]) by mx.google.com with ESMTPS id l190-20020a6391c7000000b005cdfe91fb80si5268781pge.416.2024.01.29.00.01.04 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Jan 2024 00:01:04 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-42318-ouuuleilei=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99; Authentication-Results: mx.google.com; arc=fail (signature failed); spf=pass (google.com: domain of linux-kernel+bounces-42318-ouuuleilei=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-42318-ouuuleilei=gmail.com@vger.kernel.org" Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id AF9B32824E8 for ; Mon, 29 Jan 2024 08:01:04 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 6DECE4F1F5; Mon, 29 Jan 2024 08:00:28 +0000 (UTC) Received: from CHN02-BJS-obe.outbound.protection.partner.outlook.cn (mail-bjschn02on2072.outbound.protection.partner.outlook.cn [139.219.17.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 63025524BF for ; Mon, 29 Jan 2024 08:00:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=139.219.17.72 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706515225; cv=fail; b=pvnTlDBJagdnVJpbDUvXVqotSlx2PJ7KEu93owyiORjxd+Af7SIChYW0CnvDhwW9kom/Y/O/iIOnZux2jQ8OZ+fxgEtoKslWXPjTcD8WVg1ylKBV2QmspMb2+sRRtsh38aGqTI40R31cVYTcfWJBzzobECaFs3bydHcJ0fn8OkM= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706515225; c=relaxed/simple; bh=ett9/9py2KXj3LC6qo2PsLTzhHgq0zC4CpzgTAAo2Ks=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: Content-Type:MIME-Version; b=YSa4G15ZJKcg3D0QO7Twkm9Xg/2o/gSWVghG7jE25vn992b4iBuVergV7eCDNLC1XFT5DcpcIBdGpTw0O0x/PUNVbUkRqZkRi2GWekU/FUkddzeckyzLPCniehVHLgBq3+qeDBldom1MO42QPAPzXO6MEBkPglw9Sfse0P/Z8ac= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=starfivetech.com; spf=pass smtp.mailfrom=starfivetech.com; arc=fail smtp.client-ip=139.219.17.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=starfivetech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=starfivetech.com ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=GBpD6b5zXHFdgRDXm+lljp8fY5yS3eIYRrO0ldSMXOkG5yBNQn4ESSnH3lyMA7sZFF9gcqqRkmCtTvtrHyi8FpnPVDb96YlkT+gp4qcUPj7CDrQYiXZodFZcUq2VdmQPHgNHBx/TIUyAirVfkcMKo711Ju9bbIneJ4vwo5OGNdgP0eKDZtMqhkQa6cLs3jGlRyk6RaXdL8WNihhG6iMudguzAmMoppUlsJE8D9KjEPUeFC93e9VEK6bE9q6w5hwdWLkjDZHM3B6KbxtxQ1bLloTlZAGUh3xjOXSTf10xZfDkh1S17JJVbQJg+756OcjflEIViOKE0/eB0BoTveFPnw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=vclcctiJ5OWYZEDxb0dc61vfmQgN9P7BWRd1qswym/8=; b=FLDYCl0dIi2dHBvbFH8j6gvcHW5DsVNKlfjP4865BCeTZvXYveXMPSkfdmfC+DQg6k6O18JOHljT7Mm5nIDk+9ZNGiUiT7y7ohHb54varInOBX1zmwpLGSnxVONUFGcqG/o1q6pdkkIWDN3UrIa35hRmu8Hy3hfd4gq2avLkyPKK0eZzgObXlIw5Ic/abV51PbR7MLBv4D6TdUtghqYn+gXskDZwc7NWNUx8WekxWdsr8XjZ6APKUinNXLojGO5ZqK5nPDESYNAtwiofoq+9JQO7HHmY5K1w5PgYli0u95mOZu8XkFY5Wmgd3z45Fb4Bz/Zt9IPPUvqmcNrJlDNMmQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=starfivetech.com; dmarc=pass action=none header.from=starfivetech.com; dkim=pass header.d=starfivetech.com; arc=none Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=starfivetech.com; Received: from BJSPR01MB0561.CHNPR01.prod.partner.outlook.cn (2406:e500:c211:f::16) by BJSPR01MB0545.CHNPR01.prod.partner.outlook.cn (2406:e500:c211:f::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7228.31; Mon, 29 Jan 2024 08:00:20 +0000 Received: from BJSPR01MB0561.CHNPR01.prod.partner.outlook.cn ([fe80::3862:65b4:c857:c4a6]) by BJSPR01MB0561.CHNPR01.prod.partner.outlook.cn ([fe80::3862:65b4:c857:c4a6%4]) with mapi id 15.20.7228.029; Mon, 29 Jan 2024 08:00:20 +0000 From: Sia Jee Heng To: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Cc: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, sudeep.holla@arm.com, jeeheng.sia@starfivetech.com, robh@kernel.org, conor.dooley@microchip.com, suagrfillet@gmail.com Subject: [RFC v1 2/2] riscv: cacheinfo: Refactor populate_cache_leaves() Date: Sun, 28 Jan 2024 23:59:57 -0800 Message-Id: <20240129075957.116033-3-jeeheng.sia@starfivetech.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240129075957.116033-1-jeeheng.sia@starfivetech.com> References: <20240129075957.116033-1-jeeheng.sia@starfivetech.com> X-ClientProxiedBy: NT0PR01CA0031.CHNPR01.prod.partner.outlook.cn (2406:e500:c510:c::14) To BJSPR01MB0561.CHNPR01.prod.partner.outlook.cn (2406:e500:c211:f::16) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BJSPR01MB0561:EE_|BJSPR01MB0545:EE_ X-MS-Office365-Filtering-Correlation-Id: 39db1208-901c-4394-73ac-08dc20a056af X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BJSPR01MB0561.CHNPR01.prod.partner.outlook.cn;PTR:;CAT:NONE;SFS:(13230031)(366004)(136003)(346002)(396003)(39830400003)(230922051799003)(186009)(1800799012)(64100799003)(451199024)(38350700005)(41320700001)(2616005)(2906002)(52116002)(5660300002)(6666004)(66946007)(66556008)(4326008)(26005)(1076003)(66476007)(8676002)(8936002)(38100700002)(83380400001)(508600001)(41300700001)(40180700001)(86362001)(40160700002)(36756003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: starfivetech.com X-MS-Exchange-CrossTenant-Network-Message-Id: 39db1208-901c-4394-73ac-08dc20a056af X-MS-Exchange-CrossTenant-AuthSource: BJSPR01MB0561.CHNPR01.prod.partner.outlook.cn X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Jan 2024 08:00:20.4008 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 06fe3fa3-1221-43d3-861b-5a4ee687a85c X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: MBeGMM+s+mkZnU+3A6aVRXydgcO+jJnxc+cIoBOkFBrTUMt+HLb4RRvhce9g3nFycWfyul6IELK63z2SHUdyWJlu2Vz6/u8nSO+TCp3iF+c= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BJSPR01MB0545 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1789410950104552403 X-GMAIL-MSGID: 1789410950104552403 Refactoring the cache population function to support both DT and ACPI-based platforms. Signed-off-by: Sia Jee Heng --- arch/riscv/kernel/cacheinfo.c | 47 ++++++++++++++--------------------- 1 file changed, 19 insertions(+), 28 deletions(-) diff --git a/arch/riscv/kernel/cacheinfo.c b/arch/riscv/kernel/cacheinfo.c index 30a6878287ad..f10e26fb75b6 100644 --- a/arch/riscv/kernel/cacheinfo.c +++ b/arch/riscv/kernel/cacheinfo.c @@ -74,36 +74,27 @@ int populate_cache_leaves(unsigned int cpu) { struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); struct cacheinfo *this_leaf = this_cpu_ci->info_list; - struct device_node *np = of_cpu_device_node_get(cpu); - struct device_node *prev = NULL; - int levels = 1, level = 1; - - if (of_property_read_bool(np, "cache-size")) - ci_leaf_init(this_leaf++, CACHE_TYPE_UNIFIED, level); - if (of_property_read_bool(np, "i-cache-size")) - ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level); - if (of_property_read_bool(np, "d-cache-size")) - ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level); - - prev = np; - while ((np = of_find_next_cache_node(np))) { - of_node_put(prev); - prev = np; - if (!of_device_is_compatible(np, "cache")) - break; - if (of_property_read_u32(np, "cache-level", &level)) - break; - if (level <= levels) - break; - if (of_property_read_bool(np, "cache-size")) - ci_leaf_init(this_leaf++, CACHE_TYPE_UNIFIED, level); - if (of_property_read_bool(np, "i-cache-size")) - ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level); - if (of_property_read_bool(np, "d-cache-size")) + unsigned int level, idx; + + for (idx = 0, level = 1; level <= this_cpu_ci->num_levels && + idx < this_cpu_ci->num_leaves; idx++, level++) { + /* + * Since the RISC-V architecture doesn't provide any register for detecting the + * Cache Level and Cache type, this assumes that: + * - There cannot be any split caches (data/instruction) above a unified cache. + * - Data/instruction caches come in pairs. + * - Significant work is required elsewhere to fully support data/instruction-only + * type caches. + * - The above assumptions are based on conventional system design and known + * examples. + */ + if (level == 1) { ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level); - levels = level; + ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level); + } else { + ci_leaf_init(this_leaf++, CACHE_TYPE_UNIFIED, level); + } } - of_node_put(np); return 0; }