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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6056AC7EE29 for ; Thu, 1 Jun 2023 13:29:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233951AbjFAN3h (ORCPT ); Thu, 1 Jun 2023 09:29:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37590 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234048AbjFAN3U (ORCPT ); Thu, 1 Jun 2023 09:29:20 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3759D18B for ; Thu, 1 Jun 2023 06:29:03 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 38BA7644F1 for ; Thu, 1 Jun 2023 13:28:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 538EDC433D2; Thu, 1 Jun 2023 13:28:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1685626122; bh=8cPrpwpUSHGwTVsLhEmDkOUS2HMtpoNlheNK71BGlsU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mFK0hcXHf8VK6g2N/0ISVAJsdWlxNh6jm82UncXJMIgolGBQjYx7NmnfzwulP/hpS G+NeGvhARV50Br3yY9pHMtpS0t80M7Axci8G41CzldfTtkFSw8mEjGgwdS/M0I+MpG ZrnWX+p/wzwi6Ta0sdz+HoYoqe9e1rkQj6CCHN00= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Wyes Karny , "Rafael J. Wysocki" Subject: [PATCH 6.1 39/42] cpufreq: amd-pstate: Update policy->cur in amd_pstate_adjust_perf() Date: Thu, 1 Jun 2023 14:21:48 +0100 Message-Id: <20230601131940.808879850@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230601131939.051934720@linuxfoundation.org> References: <20230601131939.051934720@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Wyes Karny commit 3bf8c6307bad5c0cc09cde982e146d847859b651 upstream. Driver should update policy->cur after updating the frequency. Currently amd_pstate doesn't update policy->cur when `adjust_perf` is used. Which causes /proc/cpuinfo to show wrong cpu frequency. Fix this by updating policy->cur with correct frequency value in adjust_perf function callback. - Before the fix: (setting min freq to 1.5 MHz) [root@amd]# cat /proc/cpuinfo | grep "cpu MHz" | sort | uniq --count 1 cpu MHz : 1777.016 1 cpu MHz : 1797.160 1 cpu MHz : 1797.270 189 cpu MHz : 400.000 - After the fix: (setting min freq to 1.5 MHz) [root@amd]# cat /proc/cpuinfo | grep "cpu MHz" | sort | uniq --count 1 cpu MHz : 1753.353 1 cpu MHz : 1756.838 1 cpu MHz : 1776.466 1 cpu MHz : 1776.873 1 cpu MHz : 1777.308 1 cpu MHz : 1779.900 183 cpu MHz : 1805.231 1 cpu MHz : 1956.815 1 cpu MHz : 2246.203 1 cpu MHz : 2259.984 Fixes: 1d215f0319c2 ("cpufreq: amd-pstate: Add fast switch function for AMD P-State") Signed-off-by: Wyes Karny [ rjw: Subject edits ] Cc: 5.17+ # 5.17+ Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- drivers/cpufreq/amd-pstate.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -284,12 +284,14 @@ static void amd_pstate_adjust_perf(unsig unsigned long capacity) { unsigned long max_perf, min_perf, des_perf, - cap_perf, lowest_nonlinear_perf; + cap_perf, lowest_nonlinear_perf, max_freq; struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); struct amd_cpudata *cpudata = policy->driver_data; + unsigned int target_freq; cap_perf = READ_ONCE(cpudata->highest_perf); lowest_nonlinear_perf = READ_ONCE(cpudata->lowest_nonlinear_perf); + max_freq = READ_ONCE(cpudata->max_freq); des_perf = cap_perf; if (target_perf < capacity) @@ -306,6 +308,10 @@ static void amd_pstate_adjust_perf(unsig if (max_perf < min_perf) max_perf = min_perf; + des_perf = clamp_t(unsigned long, des_perf, min_perf, max_perf); + target_freq = div_u64(des_perf * max_freq, max_perf); + policy->cur = target_freq; + amd_pstate_update(cpudata, min_perf, des_perf, max_perf, true); cpufreq_cpu_put(policy); }