From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:59773 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752344AbcEAWPo (ORCPT ); Sun, 1 May 2016 18:15:44 -0400 Subject: Patch "cpufreq: intel_pstate: Fix processing for turbo activation ratio" has been added to the 4.5-stable tree To: srinivas.pandruvada@linux.intel.com, gregkh@linuxfoundation.org, rafael.j.wysocki@intel.com Cc: , From: Date: Sun, 01 May 2016 15:15:43 -0700 Message-ID: <14621409431254@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled cpufreq: intel_pstate: Fix processing for turbo activation ratio to the 4.5-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: cpufreq-intel_pstate-fix-processing-for-turbo-activation-ratio.patch and it can be found in the queue-4.5 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 1becf03545a0859ceaaf9e8c2d9861882a71cb01 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Fri, 22 Apr 2016 19:53:59 -0700 Subject: cpufreq: intel_pstate: Fix processing for turbo activation ratio From: Srinivas Pandruvada commit 1becf03545a0859ceaaf9e8c2d9861882a71cb01 upstream. When the config TDP level is not nominal (level = 0), the MSR values for reading level 1 and level 2 ratios contain power in low 14 bits and actual ratio bits are at bits [23:16]. The current processing for level 1 and level 2 is wrong as there is no shift done to get actual ratio. Fixes: 6a35fc2d6c22 (cpufreq: intel_pstate: get P1 from TAR when available) Signed-off-by: Srinivas Pandruvada Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- drivers/cpufreq/intel_pstate.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -673,6 +673,11 @@ static int core_get_max_pstate(void) if (err) goto skip_tar; + /* For level 1 and 2, bits[23:16] contain the ratio */ + if (tdp_ctrl) + tdp_ratio >>= 16; + + tdp_ratio &= 0xff; /* ratios are only 8 bits long */ if (tdp_ratio - 1 == tar) { max_pstate = tar; pr_debug("max_pstate=TAC %x\n", max_pstate); Patches currently in stable-queue which might be from srinivas.pandruvada@linux.intel.com are queue-4.5/cpufreq-intel_pstate-fix-processing-for-turbo-activation-ratio.patch