[Bug 1674399] [NEW] OpenSSL CPU detection for AMD Ryzen CPUs

[Eric Desrochers]

Public bug reported:

It has been brought to my attention that :
"CPUID detection in OpenSSL does not properly detect potential optimizations for AMD processors."

After further verification on my side :

Extended feature flags were not pulled on AMD processors, as result a
number of extensions were effectively masked on Ryzen CPUs. It should
have been reported for Excavator since it implements AVX2 extension, but
apparently nobody noticed ...

The GitHub PR:
https://github.com/openssl/openssl/pull/2849

** Affects: openssl (Ubuntu)
     Importance: Low
         Status: New


** Tags: sts

** Changed in: openssl (Ubuntu)
   Importance: Undecided => Low

** Description changed:

- I has been brought to my attention that :
+ It has been brought to my attention that :
  "CPUID detection in OpenSSL does not properly detect potential optimizations for AMD processors."
  
  After further verification on my side :
  
  Extended feature flags were not pulled on AMD processors, as result a
  number of extensions were effectively masked on Ryzen CPUs. It should
  have been reported for Excavator since it implements AVX2 extension, but
  apparently nobody noticed ...
  
  The GitHub PR:
  https://github.com/openssl/openssl/pull/2849

** Tags added: sts

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https://bugs.launchpad.net/bugs/1674399

Title:
  OpenSSL CPU detection for AMD Ryzen CPUs

Status in openssl package in Ubuntu:
  New

Bug description:
  It has been brought to my attention that :
  "CPUID detection in OpenSSL does not properly detect potential optimizations for AMD processors."

  After further verification on my side :

  Extended feature flags were not pulled on AMD processors, as result a
  number of extensions were effectively masked on Ryzen CPUs. It should
  have been reported for Excavator since it implements AVX2 extension,
  but apparently nobody noticed ...

  The GitHub PR:
  https://github.com/openssl/openssl/pull/2849

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