From patchwork Fri May 8 09:11:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiongfeng Wang X-Patchwork-Id: 11536077 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 096F5159A for ; Fri, 8 May 2020 09:17:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E5AF9208CA for ; Fri, 8 May 2020 09:17:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726767AbgEHJR3 (ORCPT ); Fri, 8 May 2020 05:17:29 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:4299 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725774AbgEHJR3 (ORCPT ); Fri, 8 May 2020 05:17:29 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id AC3ACFE3BEB4DBA9C525; Fri, 8 May 2020 17:17:26 +0800 (CST) Received: from linux-ibm.site (10.175.102.37) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Fri, 8 May 2020 17:17:17 +0800 From: Xiongfeng Wang To: , , , CC: , , , , , , Subject: [RFC PATCH 0/3] add SW BOOST support for CPPC Date: Fri, 8 May 2020 17:11:01 +0800 Message-ID: <1588929064-30270-1-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: fix the return value in 'cpufreq_boost_set_sw()' cpufreq: Add SW BOOST support for drivers without frequency table CPPC: add support for SW BOOST drivers/cpufreq/cppc_cpufreq.c | 17 +++++++++++++++-- drivers/cpufreq/cpufreq.c | 25 +++++++++++++++++-------- include/linux/cpufreq.h | 2 ++ 3 files changed, 34 insertions(+), 10 deletions(-)