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[2001:1c00:c0c:fe00:7e79:4dac:39d0:9c14]) by smtp.gmail.com with ESMTPSA id q10sm6898638wme.16.2020.01.30.08.59.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 30 Jan 2020 08:59:20 -0800 (PST) Subject: Re: [PATCH 3/3] x86/tsc_msr: Make MSR derived TSC frequency more accurate To: Andy Shevchenko Cc: David Laight , Peter Zijlstra , Andy Shevchenko , Thomas Gleixner , Ingo Molnar , Vipul Kumar , Vipul Kumar , Daniel Lezcano , Srikanth Krishnakar , Cedric Hombourger , Len Brown , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" References: <20200130115255.20840-1-hdegoede@redhat.com> <20200130115255.20840-3-hdegoede@redhat.com> <20200130134310.GX14914@hirez.programming.kicks-ass.net> <01feee20ee5d4b83ab218c14fc35accb@AcuMS.aculab.com> <8a8fd7a1-945e-4541-f0bc-387fae7c6822@redhat.com> From: Hans de Goede Message-ID: Date: Thu, 30 Jan 2020 17:59:19 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 30-01-2020 17:52, Andy Shevchenko wrote: > On Thu, Jan 30, 2020 at 6:04 PM Hans de Goede wrote: >> On 30-01-2020 17:02, David Laight wrote: > >> I have no idea. Andy if you can find any docs on the MSR_FSB_FREQ values >> for Merriefield (BYT MID) and Moorefield (CHT MID) that would be great, >> if not I suggest we stick with what we have. > > First of all, Merrifield (Silvermont based Atom for phones, FYI: Intel > Edison uses it) and Moorefield (Airmont) have nothing to do with code > names Baytrail and Cherrytrail respectively. > So, please don't confuse people. Ok, sorry, I've prepped a v2 of this patch in my local tree with the following changelog: Changes in v2: -Do not refer to Merrifield / Moorefield as BYT / CHT, they only share the CPU core design and otherwise are significantly different > I'll try to find some information. OK, I'll wait a bit with sending out the v2 then. Regards, Hans