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Mail Archives: cygwin/2020/06/10/16:24:19

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To: "'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com>
Subject: RE: CPU microcode reported wrong in /proc/cpuinfo
Thread-Topic: CPU microcode reported wrong in /proc/cpuinfo
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Date: Wed, 10 Jun 2020 20:23:29 +0000
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From: "Lavrentiev, Anton \(NIH/NLM/NCBI\) \[C\] via Cygwin" <cygwin AT cygwin DOT com>
Reply-To: "Lavrentiev, Anton \(NIH/NLM/NCBI\) \[C\]" <lavr AT ncbi DOT nlm DOT nih DOT gov>
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> I'll have to recheck how Linux handles these

JFYI I was in correspondence with the cpuid utility team lately, and they told me that Linux uses vendor-specific MSRs to pull that info out:

> Check out:
> 
>    MSR_IA32_UCODE_REV
>    MSR_AMD64_PATCH_LEVEL
> 
> Both reference MSR 0x8b.

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