Re: [PATCH 0/2] x86/rdrand: implement sanity check for RDSEED

From: Borislav Petkov
Date: Thu Mar 13 2025 - 13:32:28 EST


On Wed, Mar 12, 2025 at 03:31:28PM +0300, Mikhail Paulyshka wrote:
> On the AMD Cyan Skillfish (Family 0x17 Model 0x47 Stepping 0x0), which
> is a Zen2-based APU found on the AMD BC-250 board, there is a situation
> where RDRAND works fine, but RDSEED generates FF.

On every read? Or only sometimes?

Is CF clear when it returns FF?

Thx.

--
Regards/Gruss,
Boris.

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