From nobody Sun Feb 8 02:55:59 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56669C6FD1C for ; Thu, 23 Mar 2023 12:40:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231871AbjCWMka (ORCPT ); Thu, 23 Mar 2023 08:40:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45794 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231599AbjCWMk2 (ORCPT ); Thu, 23 Mar 2023 08:40:28 -0400 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6AA2E2726 for ; Thu, 23 Mar 2023 05:40:27 -0700 (PDT) Received: by mail-pj1-x1029.google.com with SMTP id l9-20020a17090a3f0900b0023d32684e7fso3249977pjc.1 for ; Thu, 23 Mar 2023 05:40:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1679575227; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=l22jS9A4e1C/PCC1oUu93RwDdLyt3Y018WPXLhkvBHA=; b=jo/4TaIRmx15peiBHkAs34j7i9MfuA6ulwk8L4eFd46BeEq/UACAl7ur4XobFxYxqm vYPhTQupqDgk//JXCHYIgtFNcRNgK8984bpEcAj4xT1/i0Uidlb2VnhSI5X5+zeBMGoX QhqP/YfqsVQnge3umd/k1jYHGgonQ5rdXwZscjym6MvCLlVn3wIA99RY54buU7+m174Z gWF2wvfRgzPkA+dRhoWfOmJpuq9jiTVZOlz8Lo6mNlYDK4f0D+jsE2R45NNHyzsv2x+n O34PLUM2wS6fMAxQWMsHNzIoLNqNdta8fpGCZlnYPnz1xy33N+AgFXveeTkX+aQV/K1/ oQag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679575227; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=l22jS9A4e1C/PCC1oUu93RwDdLyt3Y018WPXLhkvBHA=; b=ogKbbLcGKvRnnzI6cih7qpBVU169suhnKnwLq3gZOjbSLBFCxlx2ygmlWiAGc3W3lj PjI8cxD4sLzmIUtTMaH68H23LVd1ZGxEiA2BntLywkEQOWKpLsvZxV0uH0LqTrnLKN8X VyEp9B02OFoSKjRwlZBkTlqUxYTUP7u0fSDwFGg/w2RDIo1gNlM2nH3DYTeUzQZAiR18 Bi534VhA2EiHrhSA5UJOg5SgMpwQfjfpYVOCNtbUOGIRwfCUnYVKRB/AuzSlIYlHgpkj nSOErthCgSlYD2UFxUHRw5NgNFDi9cv24LPNcd3yRQjKia2bOh5ukXTMupeuhid+686n T3RQ== X-Gm-Message-State: AO0yUKUqub3lvEzkdQm3wYGIZtICWX5hraddOvBw/HxlmSN4/WpTKPyR bLCeIGjIesiAsVzzGgtNG28= X-Google-Smtp-Source: AK7set9Isx1m4iVIIeq2lRufLyOFJqOrT7oZL8Y87oohW5hymb0XXvr7/mDzkpyIOwAWmhqDS/a4Ag== X-Received: by 2002:a17:903:2301:b0:1a1:8fd4:251 with SMTP id d1-20020a170903230100b001a18fd40251mr6415378plh.55.1679575226931; Thu, 23 Mar 2023 05:40:26 -0700 (PDT) Received: from localhost.localdomain ([221.226.144.218]) by smtp.gmail.com with ESMTPSA id e6-20020a170902744600b0019ac23cb6edsm12219749plt.181.2023.03.23.05.40.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Mar 2023 05:40:26 -0700 (PDT) From: Song Shuai To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, conor.dooley@microchip.com Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Song Shuai Subject: [PATCH V2] riscv: export cpu/freq invariant to scheduler Date: Thu, 23 Mar 2023 20:39:24 +0800 Message-Id: <20230323123924.3032174-1-suagrfillet@gmail.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" RISC-V now manages CPU topology using arch_topology which provides CPU capacity and frequency related interfaces to access the cpu/freq invariant in possible heterogeneous or DVFS-enabled platforms. Here adds topology.h file to export the arch_topology interfaces for replacing the scheduler's constant-based cpu/freq invariant accounting. Signed-off-by: Song Shuai Reviewed-by: Andrew Jones Reviewed-by: Conor Dooley Reviewed-by: Ley Foon Tan --- changes from V1: - fix the leading underscore and tidy the patch up=20 --- arch/riscv/include/asm/topology.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 arch/riscv/include/asm/topology.h diff --git a/arch/riscv/include/asm/topology.h b/arch/riscv/include/asm/top= ology.h new file mode 100644 index 000000000000..727e8d163a3b --- /dev/null +++ b/arch/riscv/include/asm/topology.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_RISCV_TOPOLOGY_H +#define _ASM_RISCV_TOPOLOGY_H + +#include + +/* Replace task scheduler's default frequency-invariant accounting */ +#define arch_scale_freq_tick topology_scale_freq_tick +#define arch_set_freq_scale topology_set_freq_scale +#define arch_scale_freq_capacity topology_get_freq_scale +#define arch_scale_freq_invariant topology_scale_freq_invariant + +/* Replace task scheduler's default cpu-invariant accounting */ +#define arch_scale_cpu_capacity topology_get_cpu_scale + +/* Enable topology flag updates */ +#define arch_update_cpu_topology topology_update_cpu_topology + +#include +#endif /* _ASM_RISCV_TOPOLOGY_H */ --=20 2.20.1