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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, 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 D9901C43460 for ; Fri, 14 May 2021 09:54:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A3AD661451 for ; Fri, 14 May 2021 09:54:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232354AbhENJza (ORCPT ); Fri, 14 May 2021 05:55:30 -0400 Received: from foss.arm.com ([217.140.110.172]:46100 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229477AbhENJz1 (ORCPT ); Fri, 14 May 2021 05:55:27 -0400 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 F0CD5169E; Fri, 14 May 2021 02:54:15 -0700 (PDT) Received: from e108754-lin.cambridge.arm.com (unknown [10.1.195.40]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 832AF3F719; Fri, 14 May 2021 02:54:14 -0700 (PDT) From: Ionela Voinescu To: Sudeep Holla , "Rafael J . Wysocki" , Thomas Gleixner , Ingo Molnar , Giovanni Gherdovich , Catalin Marinas , Will Deacon , Valentin Schneider Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 0/3] arch_topology, ACPI: populate cpu capacity from CPPC Date: Fri, 14 May 2021 10:53:36 +0100 Message-Id: <20210514095339.12979-1-ionela.voinescu@arm.com> X-Mailer: git-send-email 2.29.2.dirty MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, These are a few trivial patches to populate cpu capacity information using performance information from ACPI's CPPC. I've tied this functionality to the existing function init_freq_invariance_cppc() called in acpi_cppc_processor_probe(). This function is renamed to a more generic arch_init_invariance_cppc(). The patches have been build tested on x86 and more thoroughly tested on Juno R2 (arm64), which uses the new functionality, with the following results: root@ubuntu:~# dmesg | grep cpu_capacity [ 2.157494] init_cpu_capacity_cppc: CPU0 cpu_capacity=38300 (raw). [ 2.163699] init_cpu_capacity_cppc: CPU1 cpu_capacity=38300 (raw). [ 2.169899] init_cpu_capacity_cppc: CPU2 cpu_capacity=38300 (raw). [ 2.176098] init_cpu_capacity_cppc: CPU3 cpu_capacity=38300 (raw). [ 2.182296] init_cpu_capacity_cppc: CPU4 cpu_capacity=102400 (raw). [ 2.188581] init_cpu_capacity_cppc: CPU5 cpu_capacity=102400 (raw). [ 2.194867] cpu_capacity: capacity_scale=102400 [ 2.199409] cpu_capacity: CPU0 cpu_capacity=383 [ 2.203952] cpu_capacity: CPU1 cpu_capacity=383 [ 2.208495] cpu_capacity: CPU2 cpu_capacity=383 [ 2.213037] cpu_capacity: CPU3 cpu_capacity=383 [ 2.217580] cpu_capacity: CPU4 cpu_capacity=1024 [ 2.222209] cpu_capacity: CPU5 cpu_capacity=1024 [ 2.226886] init_cpu_capacity_cppc: cpu_capacity initialization done root@ubuntu:~# tail -n +1 /sys/devices/system/cpu/cpu*/cpu_capacity ==> /sys/devices/system/cpu/cpu0/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu1/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu2/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu3/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu4/cpu_capacity <== 1024 ==> /sys/devices/system/cpu/cpu5/cpu_capacity <== 1024 All works as expected even if ACPI processor support is built as a module. Patches are based on v5.13-rc1. Let me know what you think! Thanks, Ionela. Ionela Voinescu (3): x86, ACPI: rename init_freq_invariance_cppc to arch_init_invariance_cppc arch_topology: obtain cpu capacity using information from CPPC arm64, topology: enable use of init_cpu_capacity_cppc() arch/arm64/include/asm/topology.h | 4 ++++ arch/x86/include/asm/topology.h | 2 +- drivers/acpi/cppc_acpi.c | 6 ++--- drivers/base/arch_topology.c | 39 +++++++++++++++++++++++++++++++ include/linux/arch_topology.h | 4 ++++ 5 files changed, 51 insertions(+), 4 deletions(-) -- 2.29.2.dirty