From: Dave Hansen <dave.hansen@intel.com>
To: Mikhail Paulyshka <me@mixaill.net>, Borislav Petkov <bp@alien8.de>
Cc: Mario Limonciello <mario.limonciello@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/1] x86/rdrand: disable RDSEED on AMD Cyan Skillfish
Date: Mon, 7 Jul 2025 08:34:06 -0700 [thread overview]
Message-ID: <754835fa-6fd8-401e-9907-40fbeddf8cec@intel.com> (raw)
In-Reply-To: <40cd274e-a02b-450d-88df-aa2b92b51b12@mixaill.net>
On 7/7/25 03:17, Mikhail Paulyshka wrote:
> On 6/17/25 11:21 PM, Dave Hansen wrote:
>> Heh, maybe if x86_init_rdrand() did RDSEED too, this wouldn't have
>> slipped through QA.
>
> This might be interesting to you: in V1 of this patch set, there was an
> RDSEED sanity check, and Intel's CI detected broken RDSEED on Comet Lake:
>
> https://lore.kernel.org/all/202503211421.fc83271a-lkp@intel.com/
Just to be clear, I'd call that *A* Comet Lake system. Saying it's
"broken on Comet Lake" kinda implies that they're all broken.
I'd definitely want to rule out a single wonky system first, like it
being on some old weird microcode.
next prev parent reply other threads:[~2025-07-07 15:31 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-24 14:53 Mikhail Paulyshka
2025-05-24 16:11 ` Borislav Petkov
2025-06-17 20:05 ` Borislav Petkov
2025-06-17 20:21 ` Dave Hansen
2025-07-07 10:17 ` Mikhail Paulyshka
2025-07-07 15:25 ` Borislav Petkov
2025-07-07 15:34 ` Dave Hansen [this message]
2025-07-06 16:42 ` Mikhail Paulyshka
2025-07-06 17:07 ` Borislav Petkov
2025-07-06 20:31 ` Mikhail Paulyshka
2025-07-08 14:50 ` [tip: x86/urgent] x86/CPU/AMD: Disable INVLPGB on Zen2 tip-bot2 for Mikhail Paulyshka
2025-07-08 19:50 ` tip-bot2 for Mikhail Paulyshka
2025-07-08 14:50 ` [tip: x86/urgent] x86/rdrand: Disable RDSEED on AMD Cyan Skillfish tip-bot2 for Mikhail Paulyshka
2025-07-08 19:50 ` tip-bot2 for Mikhail Paulyshka
2026-01-14 20:52 [PATCH v2 1/1] x86/rdrand: disable " Travis B
2026-01-14 21:28 ` Borislav Petkov
2026-01-14 21:41 ` Travis B
2026-01-14 22:09 ` Travis B
2026-01-15 10:28 ` Borislav Petkov
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