From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) (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 9F2BC7E9; Thu, 5 Dec 2024 08:03:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.13 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733385829; cv=none; b=AcM5+DWmJU19fPlLalhknv2UvfoJFjHKkrjIZxZjaCPbSPY4Eb4hwX/sPNZTgrNVAJ5iCZEke572ftjEE+MHYVCNPAkirIhAcTsTHFeUvQE6Dh0CS914hX9tbL+/uvbeQQBWhuAptVxLhFUcHCU0tKVPckWzmuWQKJDKbLVZA6E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733385829; c=relaxed/simple; bh=BtEY6LY5skviZ6QJefJW/gv0kGmA3u1dzpbnAWvNbmE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=EzQKapb5WjZGXsAlieR0t6rgdTZSraOcqcN3V8JxRhKpyv6fpm5iokTjxLfFknWQrif/+9qMa6aR5FRlAwpXFzb625LE5fXKVxWRvn1DRZgORNK5ZZ73wig4Cv3R1/YY1LcuPTdu0peEqozm4RaWkLOBqmJ8t8lt3pc2eqCIzr0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com; spf=fail smtp.mailfrom=gmail.com; arc=none smtp.client-ip=192.198.163.13 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=gmail.com X-CSE-ConnectionGUID: uFBDJMngSAuFrps1Nhwwkw== X-CSE-MsgGUID: 6JFic3FxSvqlwKHAxxEzdQ== X-IronPort-AV: E=McAfee;i="6700,10204,11276"; a="36521338" X-IronPort-AV: E=Sophos;i="6.12,209,1728975600"; d="scan'208";a="36521338" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Dec 2024 00:03:47 -0800 X-CSE-ConnectionGUID: Bb3nMzzcQVynfmw/m5976w== X-CSE-MsgGUID: R1MKQbMeReS45nGvnnpc2A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="99057342" Received: from smile.fi.intel.com ([10.237.72.154]) by orviesa003.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Dec 2024 00:03:43 -0800 Received: from andy by smile.fi.intel.com with local (Exim 4.98) (envelope-from ) id 1tJ6pn-000000041LC-2a9E; Thu, 05 Dec 2024 10:03:39 +0200 Date: Thu, 5 Dec 2024 10:03:39 +0200 From: Andy Shevchenko To: Arnd Bergmann Cc: Arnd Bergmann , Ferry Toth , linux-kernel@vger.kernel.org, x86@kernel.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Linus Torvalds , Matthew Wilcox , Sean Christopherson , Davide Ciminaghi , Paolo Bonzini , kvm@vger.kernel.org Subject: Re: [PATCH 08/11] x86: document X86_INTEL_MID as 64-bit-only Message-ID: References: <20241204103042.1904639-1-arnd@kernel.org> <20241204103042.1904639-9-arnd@kernel.org> <206b50a2-922f-4a29-8c1a-b8695b19e65c@app.fastmail.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 Content-Transfer-Encoding: 8bit In-Reply-To: <206b50a2-922f-4a29-8c1a-b8695b19e65c@app.fastmail.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo On Wed, Dec 04, 2024 at 09:38:05PM +0100, Arnd Bergmann wrote: > On Wed, Dec 4, 2024, at 19:55, Andy Shevchenko wrote: > > On Wed, Dec 4, 2024 at 12:31 PM Arnd Bergmann wrote: ... > > It's all other way around (from SW point of view). For unknown reasons > > Intel decided to release only 32-bit SW and it became the only thing > > that was heavily tested (despite misunderstanding by some developers > > that pointed finger to the HW without researching the issue that > > appears to be purely software in a few cases) _that_ time. Starting > > ca. 2017 I enabled 64-bit for Merrifield and from then it's being used > > by both 32- and 64-bit builds. > > > > I'm totally fine to drop 32-bit defaults for Merrifield/Moorefield, > > but let's hear Ferry who might/may still have a use case for that. > > Ok. I tried to find the oldest Android image and saw it used a 64-bit > kernel, but that must have been after your work then. I stand up corrected, what I said is related to Merrifield, Moorefield may have 64-bit users on the phones from day 1, though. ... > Changed now to > > The only supported devices are the 22nm Merrified (Z34xx) and > Moorefield (Z35xx) SoC used in the Intel Edison board and > a small number of Android devices such as the Asus Zenfone 2, > Asus FonePad 8 and Dell Venue 7. LGTM, thanks! ... > >> - Intel MID platforms are based on an Intel processor and chipset which > >> - consume less power than most of the x86 derivatives. > > > > Why remove this? AFAIK it states the truth. > > It seemed irrelevant for users that configure the kernel. I've > put it back now. It might be, but it was already there. Thanks for leaving it untouched. -- With Best Regards, Andy Shevchenko