From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A0B63D6A22D for ; Thu, 14 Nov 2024 21:07:43 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4XqCR13xVzz2xks; Fri, 15 Nov 2024 08:07:41 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=63.228.1.57 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1731618461; cv=none; b=SZ2t9T52uL5Acm2TCNZKanDUv20AkKqhmqsUEhiCB9Pvp1uwyIu4nr+OYvHTN1Mk9DgcMuZ+d9TVukRC3gxiRNKJAIjDSED9hovYWUmRQWqr9uRagwEpGPzbAJQic+ueZAjoneJ9dqAdHNmzLeT7ta6RvxPSre6qBbYtpRhZcw8NOPbEuxKl4HeyuoxDq3nstTz+6Chin0qlsjDTwPAVtflu0Dx05SiKTwVEYZgDsYUWI63vbEdRWa+y/QMHblQbJWHA9eFBVKm5hmcd5E/5pjLXowcvMtUGPSadTTpAASLhsZLS/LcmvBp3gvZjYDl8r53TXKg+9DeroGDAVUaWgQ== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1731618461; c=relaxed/relaxed; bh=0JrYNb2pY44MvCaP2czOqCaQo8x6Qw1+81m7BHABv4Y=; h=Date:From:To:Cc:Subject:Message-ID:References:Mime-Version: Content-Type:Content-Disposition:In-Reply-To; b=C+ibY7liFVTqfUMc4lwssR627Vl6dgBxbTMkP3CqUZi40NU9rx19c5P1hMdzf9qqxWPWdh+x7JnMXQA/t5Ys7l5Vjiiuv+rbUGBvSyI29QdIpVKNWwvNVlGuSp02KGyUAeN2xlUxFkd+9tphyE0FFaY7yFvdiLOTgJRKT1TKr5OrMXLlse59vaROJJs8xSuQQuEZ0DJ0ImrvVXMncjNhY6Vom9q+ZTHfaB6fXm8yW9gYxf+FpK/x3IYakg52Ig3XlgMdAfX7a7+uGjFfrz3l/l0NWIkh0308EwJvHvnNQck894p8gwTDGRaYEBZiBRkc3l/dG83SFVlyBB9XnToO+g== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org; spf=pass (client-ip=63.228.1.57; helo=gate.crashing.org; envelope-from=segher@kernel.crashing.org; receiver=lists.ozlabs.org) smtp.mailfrom=kernel.crashing.org Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.crashing.org (client-ip=63.228.1.57; helo=gate.crashing.org; envelope-from=segher@kernel.crashing.org; receiver=lists.ozlabs.org) Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) by lists.ozlabs.org (Postfix) with ESMTP id 4XqCQz1jHzz2xgr for ; Fri, 15 Nov 2024 08:07:38 +1100 (AEDT) Received: from gate.crashing.org (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id 4AEL4KlI000954; Thu, 14 Nov 2024 15:04:20 -0600 Received: (from segher@localhost) by gate.crashing.org (8.14.1/8.14.1/Submit) id 4AEL4Ief000942; Thu, 14 Nov 2024 15:04:18 -0600 X-Authentication-Warning: gate.crashing.org: segher set sender to segher@kernel.crashing.org using -f Date: Thu, 14 Nov 2024 15:04:18 -0600 From: Segher Boessenkool To: Michael Ellerman Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, geert@linux-m68k.org, arnd@arndb.de Subject: Re: [RFC PATCH 01/10] powerpc/chrp: Remove CHRP support Message-ID: <20241114210418.GM29862@gate.crashing.org> References: <20241114131114.602234-1-mpe@ellerman.id.au> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241114131114.602234-1-mpe@ellerman.id.au> User-Agent: Mutt/1.4.2.3i On Fri, Nov 15, 2024 at 12:11:04AM +1100, Michael Ellerman wrote: > CHRP (Common Hardware Reference Platform) was a standard developed by > IBM & Apple for PowerPC-based systems. > > The standard was used in the development of some machines but never > gained wide spread adoption. > > The Linux CHRP code only supports a handful of machines, all 32-bit, eg. > IBM B50, bplan/Genesi Pegasos/Pegasos2, Total Impact briQ, and possibly > some from Motorola? No Apple machines should be affected. > > All of those mentioned above are over or nearing 20 years old, and seem > to have no active users. This was used by all non-IBM 970 systems as well. The last was SLOF on JS20 and JS21, about 20 years ago yes, and I doubt anyone uses it still (I don't). > So remove the CHRP support. If there's interest in still supporting some > of the machines that can be brought back from the git history. Sorry to see it go, but that's the way of the world :-) > Note there are still some references to CHRP/chrp in various comments > and some in the code, because later standards (eg. RPA, PAPR) used some > elements of CHRP or copied the CHRP behaviour. These will need to be > cleaned up on a case-by-case basis to either refer to newer standards or > left as-is when that's correct. > > The CHRP code was copied from arch/ppc, and before that it mostly > predates git, so the original authorship is largely lost. If anyone > wrote any of this code and would like a CREDITS entry just let me know. > > Signed-off-by: Michael Ellerman Acked-by: Segher Boessenkool Segher