From: Sohil Mehta <sohil.mehta@intel.com>
To: Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>
Cc: Xin Li <xin@zytor.com>, Thomas Gleixner <tglx@kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>, <x86@kernel.org>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Kees Cook <kees@kernel.org>,
"Ahmed S. Darwish" <darwi@linutronix.de>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/2] x86/fred: enable FRED by default
Date: Wed, 25 Mar 2026 10:07:09 -0700 [thread overview]
Message-ID: <b113dad8-fb43-4e09-af03-8b58e7f45e95@intel.com> (raw)
In-Reply-To: <20260325163028.GAacQNpB7DlkyS4MJ4@fat_crate.local>
On 3/25/2026 9:30 AM, Borislav Petkov wrote:
>>> Because you should not poke at clearing CPUID features unless you know what
>>> you're doing and this cmdline option should not exist at all. But we have it
>>> so...
>>>
>>
>> Well, it is useful for testing code paths for legacy hardware.
>
> ... which would presume you know what you're doing.
>
> clearcpuid= is not something you or I or anyone else wants to debug when
> people start clearing random CPUID bits without knowing any better.
>
> Thus the tainting.
>
Makes sense. Thanks for the insight.
next prev parent reply other threads:[~2026-03-25 17:07 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-23 20:15 H. Peter Anvin
2026-03-23 20:15 ` [PATCH 1/2] " H. Peter Anvin
2026-03-23 20:15 ` [PATCH 2/2] x86/Kconfig: tighten up wording of the CONFIG_X86_FRED help text H. Peter Anvin
2026-03-23 20:24 ` [PATCH 0/2] x86/fred: enable FRED by default Peter Zijlstra
2026-03-24 1:01 ` Sohil Mehta
2026-03-24 3:05 ` Xin Li
2026-03-24 3:52 ` H. Peter Anvin
2026-03-24 5:08 ` Sohil Mehta
2026-03-24 6:34 ` Sohil Mehta
2026-03-24 7:50 ` H. Peter Anvin
2026-03-24 17:19 ` Sohil Mehta
2026-03-24 19:53 ` Borislav Petkov
2026-03-25 16:22 ` H. Peter Anvin
2026-03-25 16:30 ` Borislav Petkov
2026-03-25 16:41 ` H. Peter Anvin
2026-03-25 17:07 ` Sohil Mehta [this message]
2026-03-24 19:50 ` Borislav Petkov
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