Re: [PATCH v2] x86/amd: Disable RDSEED on AMD Zen5 because of an error.

[Thiago Macieira]

On Friday, 7 November 2025 15:07:13 Pacific Standard Time Jason A. Donenfeld 
wrote:
> Oh. "Entropy source draining" is not a real thing. There used to be
> bizarre behavior related to /dev/random (not urandom), but this has been
> gone for ages. And even the non-getrandom Linux fallback code uses
> /dev/urandom before /dev/random. So not even on old kernels is this an
> issue. You can keep generating random numbers forever without worrying
> about running out of juice or irritating other processes.

Thank you. This probably seals the deal. I'll prepare a patch removing the 
direct use of the hardware instructions in the coming days.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Principal Engineer - Intel DCG - Platform & Sys. Eng.

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