linux-kernel - Re: [PATCH v4 03/16] x86/alternatives: Disable LASS when patching kernel alternatives

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Message-ID: <20240711081628.GF4587@noisy.programming.kicks-ass.net>
Date: Thu, 11 Jul 2024 10:16:28 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Dave Hansen <dave.hansen@...el.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Borislav Petkov <bp@...en8.de>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Andy Lutomirski <luto@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>, Ard Biesheuvel <ardb@...nel.org>,
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	Josh Poimboeuf <jpoimboe@...nel.org>,
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	Xin Li <xin3.li@...el.com>, "Mike Rapoport (IBM)" <rppt@...nel.org>,
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Subject: Re: [PATCH v4 03/16] x86/alternatives: Disable LASS when patching
 kernel alternatives

On Wed, Jul 10, 2024 at 04:05:31PM -0700, Dave Hansen wrote:

> But, I'm 100% sure that we want to distinguish a LASS-necessitated
> stac()/clac() from a SMAP-necessitated one somehow.

Yeah, if only to make it easier to understand the code.