linux-kernel - Re: [RFC PATCH 3/3] x86/microcode: Taint and warn on late loading

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Message-ID: <Yo2ASBAElqrQvzh3@agluck-desk3.sc.intel.com>
Date:   Tue, 24 May 2022 18:03:04 -0700
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 3/3] x86/microcode: Taint and warn on late loading

On Tue, May 24, 2022 at 08:53:24PM +0200, Borislav Petkov wrote:
> +	add_taint(TAINT_CPU_OUT_OF_SPEC, LOCKDEP_STILL_OK);

Seems harsh. Updating microcode to the latest is arguably the
way to make sure that your CPU stays "IN_SPEC" (since the microcode
may have a fix for a functional issue).

-Tony