From patchwork Mon May 18 07:10:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiongfeng Wang X-Patchwork-Id: 11554917 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 022AA618 for ; Mon, 18 May 2020 07:16:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DB9FC207D4 for ; Mon, 18 May 2020 07:16:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726828AbgERHQq (ORCPT ); Mon, 18 May 2020 03:16:46 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:4810 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726729AbgERHQq (ORCPT ); Mon, 18 May 2020 03:16:46 -0400 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id DF2C3410768E010C9926; Mon, 18 May 2020 15:16:43 +0800 (CST) Received: from linux-ibm.site (10.175.102.37) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.487.0; Mon, 18 May 2020 15:16:33 +0800 From: Xiongfeng Wang To: , , , CC: , , , , , , Subject: [RFC PATCH v2 0/3] add SW BOOST support for CPPC Date: Mon, 18 May 2020 15:10:05 +0800 Message-ID: <1589785808-12138-1-git-send-email-wangxiongfeng2@huawei.com> X-Mailer: git-send-email 1.7.12.4 MIME-Version: 1.0 X-Originating-IP: [10.175.102.37] X-CFilter-Loop: Reflected Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org ACPI spec 6.2 section 8.4.7.1 provide the following two CPC registers. "Highest performance is the absolute maximum performance an individual processor may reach, assuming ideal conditions. This performance level may not be sustainable for long durations, and may only be achievable if other platform components are in a specific state; for example, it may require other processors be in an idle state. Nominal Performance is the maximum sustained performance level of the processor, assuming ideal operating conditions. In absence of an external constraint (power, thermal, etc.) this is the performance level the platform is expected to be able to maintain continuously. All processors are expected to be able to sustain their nominal performance state simultaneously." We can use Highest Performance as the max performance in boost mode and Nomial Performance as the max performance in non-boost mode. If the Highest Performance is greater than the Nominal Performance, we assume SW BOOST is supported. Xiongfeng Wang (3): cpufreq: handle the return value of '.set_boost()' properly cpufreq: export 'cpufreq_policy_list' and make macro 'for_each_*_policy' public CPPC: add support for SW BOOST drivers/cpufreq/cppc_cpufreq.c | 42 ++++++++++++++++++++++++++++++++++++++++-- drivers/cpufreq/cpufreq.c | 21 ++++++--------------- include/linux/cpufreq.h | 14 ++++++++++++++ 3 files changed, 60 insertions(+), 17 deletions(-)