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 C2B97D5A6DC for ; Tue, 26 Nov 2024 03:49:59 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4Xy7r62R9xz2yVb; Tue, 26 Nov 2024 14:49:58 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2404:9400:2221:ea00::3" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1732592998; cv=none; b=k7DkoWZVueyu7u+FROX3nzCxpOxr52gE5TeJw0NNssT2zwJmkVy9O93wa5vwNxdC6BgWQcZioS+e87O364tHir+DsEKlILOT5SWmPhlkQ+Kui+O9BzDwKPn7xY4vrN6XM/D6FWN+fVZrKPwINyvt5NFjU93FVwUYglA+SUOZIyFcAsF1F4+HVrbpOr0mSBD7tec61u8wlEF91LdRb/4/F4rBhGJVFJMKMoAOHZdaLHysXD1jZUfnbmbuf+MdVlX1iwoAs5Wdl75mpXpIc2YVi29LgPXJW3x/eSv+RH6DCIk0Va++H0VCKIWhjUAaPCwPKLiChHCzMhxYsaGecIbR/Q== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1732592998; c=relaxed/relaxed; bh=1GDroj8cvLi8AxibFvo2uc0aSiYUK5hkkTcQYG+0QMU=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=UnnUVKSnjvzj6POdURGSPk36zLmLP16XGkcSR5jGtBiqPUINnnehZXCi41IIXZSTquCUbsTmEyP4Lg1I2t8MJDuhw1wnVq0oFacQI3H/G3KvIpqIf3uwFa3W/N9IuFundWP9KKduu3/lpnlZ/3BjlMiv5zUfgu062DAGMnBbi5imp0bkX44W0up59zy6EzQPjbyrKitbPoZAsoV0A6OgSDznJHR+2p2QHlsfzFrjI5qkUW1+z5nw7pR/VuqLFm1Tf+baVqXQaYbWIgKVnDJRCH6A8d63V2fWa8czJhekraRto1TQ6L8wO+AFJljKaaUoEpCK2jn3I91Q/qr5jpDy/w== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au; dkim=pass (2048-bit key; unprotected) header.d=ellerman.id.au header.i=@ellerman.id.au header.a=rsa-sha256 header.s=201909 header.b=R3WKrDKY; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ellerman.id.au header.i=@ellerman.id.au header.a=rsa-sha256 header.s=201909 header.b=R3WKrDKY; dkim-atps=neutral Received: from mail.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Xy7r52xwlz2xxt for ; Tue, 26 Nov 2024 14:49:57 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ellerman.id.au; s=201909; t=1732592993; bh=1GDroj8cvLi8AxibFvo2uc0aSiYUK5hkkTcQYG+0QMU=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=R3WKrDKYw/ByHHEa3PtgTcc8Xvh/auZj8U5ShHkBVdPy++QKCXrk6InR/jlQz2g46 Ho3w7cBt7fIt75TfsDMPoccD5p0suflRBhbppyLZX0SOea3+KT1vLVP6q4j+hA7TNd QtKRqI0xD++3UaInC37uz3VJIV+X8ZM3in0MRSbQEwzqA++giq9uCV9m7G/E1Av0jC 2j6tYOINNtTiSI3JxBWbOh0dyPlF/OyYE7voVaU7kBqyNlwf1Bj3YxOaFjgRX5JLiN oBNtQU0aNHOTFz9t5zgiM+A/yBhv09Us81gDkbiOP93txeBtDtCFzbtpqfwPhV3SYX BqQqPONaaOXRA== Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mail.ozlabs.org (Postfix) with ESMTPSA id 4Xy7r163rdz4wcy; Tue, 26 Nov 2024 14:49:53 +1100 (AEDT) From: Michael Ellerman To: Segher Boessenkool 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 In-Reply-To: <20241114210418.GM29862@gate.crashing.org> References: <20241114131114.602234-1-mpe@ellerman.id.au> <20241114210418.GM29862@gate.crashing.org> Date: Tue, 26 Nov 2024 14:49:49 +1100 Message-ID: <87mshm7ixu.fsf@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 Segher Boessenkool writes: > 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). By "this" you mean the CHRP standard? At least in Linux the "CHRP" platform has always been 32-bit only AFAIK. My memory is that JS20/JS21 used the "maple" platform, which was a 64-bit only bare-metal platform, possibly it was actually == CHRP, but we didn't call it that in Linux. But maybe I'm wrong, you were more involved than me back than, and it was a long time ago :) cheers