From patchwork Thu Jan 18 12:05:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Pandruvada X-Patchwork-Id: 763839 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AB139241EC; Thu, 18 Jan 2024 12:05:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.9 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705579519; cv=none; b=l1Mw+GqQa0fkuyUQdxw4hvvuG4MHRQHaGsQtlOi8Bw9eLkPHuMlUQEC9AZ0zw+a3uT+s/dQacUxhib/BjL0SXGnDUGs0ILyodbU8d78ryIQjCwpQ9OqZG5F56JObLJYF+rgHO46u9B8jY5b+/T7K9KNrRzq9AeiYJ7V9FSKg3YY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705579519; c=relaxed/simple; bh=SNU17WpjdPFohIh6bNYg3pQZpp+L6Jmf/1lHQBAlWQI=; h=DKIM-Signature:X-IronPort-AV:X-IronPort-AV:Received:X-ExtLoop1: X-IronPort-AV:Received:From:To:Cc:Subject:Date:Message-Id:X-Mailer: MIME-Version:Content-Transfer-Encoding; b=fmPFeMcZ1oInfM3UmZCGxS522kC8+ay3EiuxMFl8XU1Jwu2qWWzppvXeEm9V8MPlMzjoDpIyr0OPO/mjztsJQt5vTFqJhzjz9kcp0H7C/3gkQDi+MSL0fLp701ENl942Ak2LDYGTWRINHnBabS0YTvl7uz0+mVAI+IWgyd8LwoY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=FVz8l6bl; arc=none smtp.client-ip=192.198.163.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="FVz8l6bl" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1705579516; x=1737115516; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=SNU17WpjdPFohIh6bNYg3pQZpp+L6Jmf/1lHQBAlWQI=; b=FVz8l6blqZcEovO3HhOQ+0prPH/mr+09iNSBNVsCrKpKJKOzuHRLNhZV MYwk6W+SaqeHev91VI29LtYpHNTIxoM+yaExKuTEuu5L+QPtpIoXKCyau BqwhevAs8iGFtUyrRziO/LjOYuvTgteyWnuPKn6p+F9vDETeatPMAB1bg EJ8HiSAOELeulMLP0UbmzP9Zn74y4njAtpEIbLjiXQZlTisMleh0PrYui NDeecj/uTFeuCuFZKzUEabdS6SNuIFNPknluPOTJzQwOR6zfQ25gFvyNc UYjXdPIPvM9M9WUTV2VPsbXFs5JNm/D9Q+AL64esX/OrLWxhcj9AKXFxQ A==; X-IronPort-AV: E=McAfee;i="6600,9927,10956"; a="7188533" X-IronPort-AV: E=Sophos;i="6.05,201,1701158400"; d="scan'208";a="7188533" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Jan 2024 04:05:15 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,201,1701158400"; d="scan'208";a="396341" Received: from spandruv-desk.jf.intel.com ([10.54.75.14]) by orviesa004.jf.intel.com with ESMTP; 18 Jan 2024 04:05:15 -0800 From: Srinivas Pandruvada To: rafael@kernel.org, viresh.kumar@linaro.org Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Srinivas Pandruvada Subject: [PATCH] cpufreq: intel_pstate: Directly use stored ratios for max frequencies Date: Thu, 18 Jan 2024 04:05:13 -0800 Message-Id: <20240118120513.1018808-1-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Avoid unnecessary calculation for converting frequency to performance ratio by using a scaling factor for the maximum non turbo and turbo frequency. Here the driver already stored performance ratios for max non turbo and turbo frequency by reading from MSR_HWP_CAPABILITIES. Directly use those ratios without any calculations. Signed-off-by: Srinivas Pandruvada --- drivers/cpufreq/intel_pstate.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 2ca70b0b5fdc..6bbc21ca96e0 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -2532,7 +2532,14 @@ static void intel_pstate_update_perf_limits(struct cpudata *cpu, int freq; freq = max_policy_perf * perf_ctl_scaling; - max_policy_perf = DIV_ROUND_UP(freq, scaling); + + if (freq == cpu->pstate.turbo_freq) + max_policy_perf = cpu->pstate.turbo_pstate; + else if (freq == cpu->pstate.max_freq) + max_policy_perf = cpu->pstate.max_pstate; + else + max_policy_perf = DIV_ROUND_UP(freq, scaling); + freq = min_policy_perf * perf_ctl_scaling; min_policy_perf = DIV_ROUND_UP(freq, scaling); }