From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: linux-kernel@vger.kernel.org
Cc: linux-tip-commits@vger.kernel.org, stable@vger.kernel.org,
Gregory Price <gourry@gourry.net>,
"Borislav Petkov (AMD)" <bp@alien8.de>,
x86@kernel.org
Subject: Re: [tip: x86/urgent] x86/CPU/AMD: Add RDSEED fix for Zen5
Date: Thu, 30 Oct 2025 22:48:23 +0100 [thread overview]
Message-ID: <aQPdJ7CbIRI6dj0Q@zx2c4.com> (raw)
In-Reply-To: <aQOo3LcsdU23q1i2@zx2c4.com>
On Thu, Oct 30, 2025 at 07:05:16PM +0100, Jason A. Donenfeld wrote:
> I didn't see this on LKML or any mailing list before this appeared in
> tip. Did I miss something?
Also, by the way,
Link: https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7055.html
> Until the microcode patch is deployed, the following software
> workaround options could be used:
>
> [...]
>
> - Software can treat RDSEED returning 0 equivalent to when CF=0. Retry
> RDSEED later until a non-zero value is returned with CF=1
You sure that's such a good idea?
Jason
next prev parent reply other threads:[~2025-10-30 21:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-28 12:01 [tip: x86/urgent] x86/CPU/AMD: Add RDSEED fix for Zen5 tip-bot2 for Gregory Price
2025-10-30 18:05 ` Jason A. Donenfeld
2025-10-30 21:48 ` Jason A. Donenfeld [this message]
2025-11-03 13:59 ` Peter Jung
2025-11-03 14:28 ` Borislav Petkov
2025-11-03 16:12 ` Thomas Gleixner
2025-11-24 22:18 ` Pavel Machek
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