From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.alien8.de (mail.alien8.de [65.109.113.108]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4362D1E9919 for ; Sat, 4 Jul 2026 18:30:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=65.109.113.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783189831; cv=none; b=m3ao9ZJESozgyzAJQQ7NBNX1vpsh7OE6ZH7rqxsuKuPsiPDyP5Vq1RHFEwLyPoCJPah9GoLd/yjp8wjRol5myjVEM337ZuGHemE6gSneo+uysYismX5UuxKvo6EXBkjgxBaSIlRdRAa5IjBNhkW6HkHGSmQUFQ38sJkkLy+wpiM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783189831; c=relaxed/simple; bh=Kf8aRL41E43f3wlTapPwLbTKQr4lB6cXUs9gTpUvAgk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KWRV1TN/8An6VwcGn0zUTAkrRuSbqA0fx2OpVQ5ZjhSJZQDbCIWuStBVvTEoeW+T8VW8odsD+LkEj3o6CVQEY6CNP6asSYapJ4Ea+w6tZ14aTOQY2JorjU3xQbw8OyvSpNf1BjfmdkEEyUHlrJUC7DvOJkYw4OPkgQhWyOExPNk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de; spf=pass smtp.mailfrom=alien8.de; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b=G/xxNsTz; arc=none smtp.client-ip=65.109.113.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=alien8.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b="G/xxNsTz" Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id C2EC840E00B8; Sat, 4 Jul 2026 18:30:17 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at mail.alien8.de Authentication-Results: mail.alien8.de (amavisd-new); dkim=pass (4096-bit key) header.d=alien8.de Received: from mail.alien8.de ([127.0.0.1]) by localhost (mail.alien8.de [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 4vJisVsaU4Sk; Sat, 4 Jul 2026 18:30:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1783189807; bh=8nb8IQFL5WDpGVVhZnAP042VhbOSAmW7BhVQMpcYor4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=G/xxNsTzNPaG1q3pE2NMK+k5Ho2v8t3Tix3dItoADjVfYOKYWRi936ASjx5IduCSw SjjgyPIxaGur34atF79GFsQbK8h0/y8s5f+bvEJJr5eHeZ+CyBhd4FVY68a5JjsjD9 LjlaJPMumIDi7MSs1jQeXiLY10PhsS/PYTbW42B10+RSYfe3ISLjTFDF0oGlIDHTyA vYfg1+qAbIlVCqOIoXQfFjtQzZfT225UDQnqRyjS5MFHe/vehe5At64ATsiDmYhbzy GTIK/l2C9vIwQrFUIBqO/MXoCi6P3FfXV+aIankRaw/xaYmniIHpdOclvm0LvTZ9E/ xttCXsRZNNrDxtwxE2EvajRP1VGqFzdgJaLvk7SUMZHuhOdO7ofPbGHYmlP9rykOge F1PwUZygInfC7HxFtA23dj3qOwfa+K9wHVzkzVCFBQux8XXDLVaGTt2t72DxNDM0JA 89FdwawC+U9xuB6b6eowLVw7nOeLR087/wA8ALnjEAXZFfZSU0YxQCEAkQczdfRare IxL5Jvkz4W+026XPj7A9cL/KA8G6quOkLCLqB/M7bimUNmFGJvZO1PvwgFpc/+dYzT FulB+PIOFBUTfY0SeppmO6Jp/KzW+cBvTpiTjNipFGdHWDnHUUG3eBrlnqXdNJ8WFJ gxguQDalrFZopf90L3NJ+/Zg= Received: from stx.tnic (unknown [IPv6:2600:1700:38ca:c00::e]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 748AD40E00BF; Sat, 4 Jul 2026 18:29:56 +0000 (UTC) Date: Sat, 4 Jul 2026 11:29:52 -0700 From: Borislav Petkov To: Evalyn Goemer , hpa@zytor.com, dave.hansen@linux.intel.com Cc: ludloff@gmail.com, linux-kernel@vger.kernel.org, tglx@kernel.org, mingo@redhat.com, x86@kernel.org, joe@perches.com, Andrew Cooper Subject: Re: [PATCH] platform/x86: handle Intel CPUs falsely reporting as GenuineIotel Message-ID: <20260704182952.GAaklRINnc6XDFoGcE@fat_crate.local> References: <31nKPXtCQwaVciQ3mSoYDQ@evalyngoemer.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <31nKPXtCQwaVciQ3mSoYDQ@evalyngoemer.com> On Sat, Jul 04, 2026 at 02:15:02PM -0400, Evalyn Goemer wrote: > > Overall, it's an outlier, and I'd flag such systems, not placate them. > > Yeah it's a very strange thing I have found and thought could be worth > handling. I ended up making the patch this way since this is the only case of > this I could see as well other codebases online handled it similarly. Well, Sashiko pointed out a couple more places: https://sashiko.dev/#/patchset/20260704025147.585133-1-git%40evalyngoemer.com which would need to be taken care of too. But I tend to agree with Christian and even go a step further - completely stop booting on them. Because who knows what else has been tampered with in them. Yeah, yeah, bit flips, sure, but a system which generates bit flips reliably gets its DRAM replaced so why should we treat this thing differently... Let's see what Intel folks say here too. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette