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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 0FB0DC10F05 for ; Thu, 4 Apr 2019 09:03:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D1F442184B for ; Thu, 4 Apr 2019 09:03:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554368582; bh=aRygrkTRpNOj80+8d7E0sHx+5RlqO6UClzeir1+cF74=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=J5mAuIXrIyWqxjiULOv4qSXVZ0m9WsHU3Os5xq/3AMe+nudvi3LBFRhk23ARj6T6I ywOVuoJU46xRZhkmSvTau5oyymfsoxYDx0eFSLz/7XAJQ0DnTX9iRUpkjMlxH/ywz0 /wSPg99mUJmwwK5egm8d4cCb/tqT+XZP+VRcIlwo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731469AbfDDJDB (ORCPT ); Thu, 4 Apr 2019 05:03:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:40552 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731707AbfDDJC5 (ORCPT ); Thu, 4 Apr 2019 05:02:57 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E7E4521741; Thu, 4 Apr 2019 09:02:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554368576; bh=aRygrkTRpNOj80+8d7E0sHx+5RlqO6UClzeir1+cF74=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oT1EbXkxx0clAywahT7lruFM900eGi8CSawyo9a8Yo2ZQ47f42smIKGEmCOZSAcSc aTGX1nb/cFQVEeJ7W8MzVUk/qBEslm4Yx8qfFrCs0MG4b0+Z3DkXQrDOiVHxQVInnw w2UMQ0FKIMBDtQQ29O8wHt7zZ0n++P0CGf3uFq7k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Erwan Velu , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 4.19 074/187] cpufreq: acpi-cpufreq: Report if CPU doesnt support boost technologies Date: Thu, 4 Apr 2019 10:46:51 +0200 Message-Id: <20190404084606.532165443@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190404084603.119654039@linuxfoundation.org> References: <20190404084603.119654039@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 1222d527f314c86a3b59a522115d62facc5a7965 ] There is some rare cases where CPB (and possibly IDA) are missing on processors. This is the case fixed by commit f7f3dc00f612 ("x86/cpu/AMD: Fix erratum 1076 (CPB bit)") and following. In such context, the boost status isn't reported by /sys/devices/system/cpu/cpufreq/boost. This commit is about printing a message to report that the CPU doesn't expose the boost capabilities. This message could help debugging platforms hit by this phenomena. Signed-off-by: Erwan Velu [ rjw: Change the message text somewhat ] Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/cpufreq/acpi-cpufreq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index b61f4ec43e06..aca30f45172e 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -911,8 +911,10 @@ static void __init acpi_cpufreq_boost_init(void) { int ret; - if (!(boot_cpu_has(X86_FEATURE_CPB) || boot_cpu_has(X86_FEATURE_IDA))) + if (!(boot_cpu_has(X86_FEATURE_CPB) || boot_cpu_has(X86_FEATURE_IDA))) { + pr_debug("Boost capabilities not present in the processor\n"); return; + } acpi_cpufreq_driver.set_boost = set_boost; acpi_cpufreq_driver.boost_enabled = boost_state(0); -- 2.19.1