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=-7.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 8B9C5C43381 for ; Wed, 20 Mar 2019 23:48:30 +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 502B0218A5 for ; Wed, 20 Mar 2019 23:48:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="VKUGu6L6"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=wdc.com header.i=@wdc.com header.b="CDQO+GQG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 502B0218A5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=wdc.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+infradead-linux-riscv=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-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=1l5G8jiJvvkwbALXZVJ7Tn2WmunsURbAVVyv1fBFtgM=; b=VKUGu6L6ep8x51 LOQATXx+Xd5CqUSvkqa0IrFzjFfje3kOOH5rUrEGYotcPwCaaogzFPJLwpOrfIy/+phDOGL45wK7x 92oToqQq01NUDKztMfHAuevK3Qf8tpBcjB1VaFwAq9VHBPQIbEqAaGog6uOcgU5Udme7Zlbl8Chn/ di+f7uzfg32W7OYc9OBXWeayBcI+EeaOSkdCbpO20IhSQmFUsfOMPqJsjQrdVw1+bou6W9ZeBakwT 7Rohu3/fiHKmE3QfpmiRVCBrO0B5PeYI7XVdJb4u54HcWQdXWjLq5u+MLCwsgWvQqdkbZ4On7lQ2Z kxCAAaQV/tYoDdEwbHCw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h6kwV-0001PX-30; Wed, 20 Mar 2019 23:48:19 +0000 Received: from esa1.hgst.iphmx.com ([68.232.141.245]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h6kwT-0001OM-4L for linux-riscv@lists.infradead.org; Wed, 20 Mar 2019 23:48:18 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1553125697; x=1584661697; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=MXoKOqnmh4glr82XcmuusqJSAAOR3fVo1vwmgG/zsgo=; b=CDQO+GQGVCzM81YwTy161NQc4kHdj0lqJ27SR8vd9vaiXCvGj0J7CvJO 0A83a0nriuWKk/ZYatwF+x7mMJVIZF+Z3qGyUoivsrYbl+9HRV5d6OK+7 lWT/M0QcguzVvNjAMQ9jLDz716wRMYrnYG1OaY8vlaRiFkTkAF/eFYhgX hz75aJ7FJKgy9lZ7+fWV5s9FEK3YnbnPtvsWnfXsipPak2aMx8B9t6zA0 YBckG34Iom6q9kzISvM38W5DcZPzrRleb/CQpEhALGsu1NyJU/U/Jow5y r2/KC1azgNRGPftEuaUtV0cBXQg8n99QgWOgy1co7rEcHX/SLXsTbMqV+ A==; X-IronPort-AV: E=Sophos;i="5.58,498,1544457600"; d="scan'208";a="209432738" Received: from uls-op-cesaip02.wdc.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 21 Mar 2019 07:48:14 +0800 IronPort-SDR: 9zW6b1385Kfu+5V6mdgD9hmjRbqw1Zg24pv+RtJOlIiMts5CddRL1bBa/rTtQKhYTR1R2CbsID 0nfCd52JUfPA1UXjQv4Th9WmCd+oT7AAp9bbAVA3oh8nyUWbaPIJGZGDzi2Q93ppsbKYku47Za NNK0HNpR6VuAc8/nG1BTBx0CcItVnX/Ry/iv7Fz1DFXyVsNPGM4GOKrGY5pZwC1N0G1Izo0wJw CF27eGRbYqlTtq/ZBL2JUBy895EMwNfniydv6kKzWkyyxEH+5QfVdKimn7BiiXR3Lm2tvWOhGy qjTtu2UBXwBwnweyIhKreKh7 Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep02.wdc.com with ESMTP; 20 Mar 2019 16:27:51 -0700 IronPort-SDR: IhuVAZBifJqI9IKuS0jMxBGdTiTGwyls+8KLoVoQxR+MZbq17NQMJCS0zCKmfv0FIyjO5ER+xU uKuBwqw/ciq7haWhaHEIk3iVr3tST6zhbS0LPkrpPy5EeDNgiqX3bVX278b8DCIcf+TvF8yB8P od3lJ8UVXt6YkRV6SQonasIb1Py4zUs+W0nWwynSyOsV5qt3dj3wBaQRQ4ULYfxBfcrLk4MgDr GcCUZHd/G16Iswe9a6I/0aEFqnhvrprV/s/sj7igbIhsMn3J1LW6/qV9jVc8tkJm/NekKVyY4o Fr0= Received: from jedi-01.sdcorp.global.sandisk.com (HELO jedi-01.int.fusionio.com) ([10.11.143.218]) by uls-op-cesaip01.wdc.com with ESMTP; 20 Mar 2019 16:48:14 -0700 From: Atish Patra To: linux-kernel@vger.kernel.org Subject: [RFT/RFC PATCH v3 0/5] Unify CPU topology across ARM & RISC-V Date: Wed, 20 Mar 2019 16:48:01 -0700 Message-Id: <20190320234806.19748-1-atish.patra@wdc.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190320_164817_290585_5287FF4F X-CRM114-Status: GOOD ( 14.04 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , "Rafael J. Wysocki" , "Peter Zijlstra \(Intel\)" , Catalin Marinas , Palmer Dabbelt , Will Deacon , Atish Patra , linux-riscv@lists.infradead.org, Ingo Molnar , Dmitriy Cherkasov , Anup Patel , Morten Rasmussen , devicetree@vger.kernel.org, Albert Ou , Johan Hovold , Rob Herring , Paul Walmsley , Ard Biesheuvel , Greg Kroah-Hartman , Jeremy Linton , Otto Sabart , Sudeep Holla Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org The cpu-map DT entry in ARM can describe the CPU topology in much better way compared to other existing approaches. RISC-V can easily adopt this binding to represent its own CPU topology. Thus, both cpu-map DT binding and topology parsing code can be moved to a common location so that RISC-V or any other architecture can leverage that. The relevant discussion regarding unifying cpu topology can be found in [1]. arch_topology seems to be a perfect place to move the common code. I have not introduced any significant functional changes in the moved code. The only downside in this approach is that the capacity code will be executed for RISC-V as well. But, it will exit immediately after not able to find the appropriate DT node. If the overhead is considered too much, we can always compile out capacity related functions under a different config for the architectures that do not support them. There was an opportunity to unify topology data structure for ARM32 done by patch 3/4. But, I refrained from making any other changes as I am not very well versed with original intention for some functions that are present in arch_topology.c. I hope this patch series can be served as a baseline for such changes in the future. The patches have been tested for RISC-V and compile tested for ARM64, ARM32 & x86. The socket change[2] is also now part of this series. [1] https://lkml.org/lkml/2018/11/6/19 [2] https://lkml.org/lkml/2018/11/7/918 QEMU changes for RISC-V topology are available at https://github.com/atishp04/qemu/tree/riscv_topology_dt HiFive Unleashed DT with topology node is available here. https://github.com/atishp04/opensbi/tree/HiFive_unleashed_topology It can be verified with OpenSBI with following additional compile time option. FW_PAYLOAD_FDT="unleashed_topology.dtb" Changes from v2->v3 1. Cover letter update with experiment DT for topology changes. 2. Added the patch for [2]. Changes from v1->v2 1. ARM32 can now use the common code as well. Atish Patra (4): dt-binding: cpu-topology: Move cpu-map to a common binding. cpu-topology: Move cpu topology code to common code. arm: Use common cpu_topology RISC-V: Parse cpu topology during boot. Sudeep Holla (1): Documentation: DT: arm: add support for sockets defining package boundaries .../topology.txt => cpu/cpu-topology.txt} | 134 ++++++-- arch/arm/include/asm/topology.h | 22 +- arch/arm/kernel/topology.c | 10 +- arch/arm64/include/asm/topology.h | 23 -- arch/arm64/kernel/topology.c | 303 +----------------- arch/riscv/Kconfig | 1 + arch/riscv/kernel/smpboot.c | 3 + drivers/base/arch_topology.c | 298 ++++++++++++++++- drivers/base/topology.c | 1 + include/linux/arch_topology.h | 36 +++ 10 files changed, 453 insertions(+), 378 deletions(-) rename Documentation/devicetree/bindings/{arm/topology.txt => cpu/cpu-topology.txt} (66%) -- 2.21.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv