From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp-out-no.shaw.ca (smtp-out-no.shaw.ca [64.59.134.13]) by sourceware.org (Postfix) with ESMTPS id 619B73857C58 for ; Thu, 16 Jul 2020 20:13:51 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 619B73857C58 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=SystematicSw.ab.ca Authentication-Results: sourceware.org; spf=none smtp.mailfrom=brian.inglis@systematicsw.ab.ca Received: from [192.168.1.104] ([24.64.172.44]) by shaw.ca with ESMTP id wAGLjiiRh62brwAGMjFN99; Thu, 16 Jul 2020 14:13:50 -0600 X-Authority-Analysis: v=2.3 cv=LKf9vKe9 c=1 sm=1 tr=0 a=kiZT5GMN3KAWqtYcXc+/4Q==:117 a=kiZT5GMN3KAWqtYcXc+/4Q==:17 a=IkcTkHD0fZMA:10 a=gwMg6M9y6T5EFgRA8E4A:9 a=QEXdDO2ut3YA:10 Reply-To: cygwin@cygwin.com Subject: Re: CPU microcode reported wrong in /proc/cpuinfo To: cygwin@cygwin.com References: <5f880838-55ad-6f6e-33a6-6a57d7ae9c92@SystematicSw.ab.ca> <68eea787-9cde-d6ed-499b-61dfc036adff@SystematicSw.ab.ca> <04c2c0ea-1e27-508b-c054-a5ad8e1da240@SystematicSw.ab.ca> From: Brian Inglis Autocrypt: addr=Brian.Inglis@SystematicSw.ab.ca; prefer-encrypt=mutual; keydata= mDMEXopx8xYJKwYBBAHaRw8BAQdAnCK0qv/xwUCCZQoA9BHRYpstERrspfT0NkUWQVuoePa0 LkJyaWFuIEluZ2xpcyA8QnJpYW4uSW5nbGlzQFN5c3RlbWF0aWNTdy5hYi5jYT6IlgQTFggA PhYhBMM5/lbU970GBS2bZB62lxu92I8YBQJeinHzAhsDBQkJZgGABQsJCAcCBhUKCQgLAgQW AgMBAh4BAheAAAoJEB62lxu92I8Y0ioBAI8xrggNxziAVmr+Xm6nnyjoujMqWcq3oEhlYGAO WacZAQDFtdDx2koSVSoOmfaOyRTbIWSf9/Cjai29060fsmdsDLg4BF6KcfMSCisGAQQBl1UB BQEBB0Awv8kHI2PaEgViDqzbnoe8B9KMHoBZLS92HdC7ZPh8HQMBCAeIfgQYFggAJhYhBMM5 /lbU970GBS2bZB62lxu92I8YBQJeinHzAhsMBQkJZgGAAAoJEB62lxu92I8YZwUBAJw/74rF IyaSsGI7ewCdCy88Lce/kdwX7zGwid+f8NZ3AQC/ezTFFi5obXnyMxZJN464nPXiggtT9gN5 RSyTY8X+AQ== Organization: Systematic Software Message-ID: <839d4123-c77e-e53e-9c19-cfcc38209c0a@SystematicSw.ab.ca> Date: Thu, 16 Jul 2020 14:13:49 -0600 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <04c2c0ea-1e27-508b-c054-a5ad8e1da240@SystematicSw.ab.ca> Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 7bit X-CMAE-Envelope: MS4wfAjTuEcj2e3gzXnoDJxi0RfARZ3ITKT0W5o8vsNLfKOuz/X/PazL0d/EkjYEafhkcvxd+6/mw2AC4+npqatCJJNaC9al9SCgWO2PmYnf/h51t7I/3O0P N6DcJq/B7bfXdCjJHNtrxWgWXsCLblUgHG6pTSrBT2KSHv6aPR6Kmj17EzYYn0+TK4Trre/UEzUJ7w== X-Spam-Status: No, score=-8.7 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, KAM_LAZY_DOMAIN_SECURITY, RCVD_IN_DNSWL_LOW, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=no autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: cygwin@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 16 Jul 2020 20:13:52 -0000 On 2020-07-16 13:46, Brian Inglis wrote: > On 2020-07-16 08:56, Lavrentiev, Anton (NIH/NLM/NCBI) [C] via Cygwin wrote: > It may be possible that Windows executes a CPUID instruction, and then reads MSR Intel states CPUID of leaf EAX = 1, so not reading that leaf may not update MSR. > 8BH IA32_BIOS_SIGN_ID to get the current value, without first preloading the MSR > with zero, and rather than interpreting the zero result as unchanged, just > reports that value. -- Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada This email may be disturbing to some readers as it contains too much technical detail. Reader discretion is advised. [Data in IEC units and prefixes, physical quantities in SI.]