linux-kernel - Re: [PATCH] [RFC] x86/cpu: rework instruction set selection

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Message-ID: <aA4EbGhuHNUYlkp_@gmail.com>
Date: Sun, 27 Apr 2025 12:18:20 +0200
From: Ingo Molnar <mingo@...nel.org>
To: "H. Peter Anvin" <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>, Arnd Bergmann <arnd@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	Juergen Gross <jgross@...e.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Alexander Usyskin <alexander.usyskin@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Mateusz Jończyk <mat.jonczyk@...pl>,
	Mike Rapoport <rppt@...nel.org>, Ard Biesheuvel <ardb@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org,
	xen-devel@...ts.xenproject.org
Subject: Re: [PATCH] [RFC] x86/cpu: rework instruction set selection


* H. Peter Anvin <hpa@...or.com> wrote:

> The undefined zero case applies to family < 6 as far as I know... the 
> same platforms which don't have cmov...

So, technically, these are family 5 CPUs with CMOV support, if 
Kconfig.cpu can be believed:

  MGEODE_LX
  MCRUSOE

Right?

	Ingo