From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) (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 0AC771A28D for ; Tue, 26 Nov 2024 03:49:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=150.107.74.76 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732593001; cv=none; b=pJPjcQerHR4eIHddx+dpLz2aF991yxV5Kc28MeCnNYYBccIBplMNvHJXeiGm2YDRvYW/B2Is1AERMLPczEwytxFOU5Os04fSQMMoxsQKmiufu9O7lLwBKQe6l4lHBsJAKTr6Tlo9qjEt77OzChD0I68yjloLPcfchkjjQjIAwyo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732593001; c=relaxed/simple; bh=QYc6U6l2LP084zljP9h6GyNy4Bv4iwI/lb8bqGR+7f0=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=DzopwjMxz7Wk3E7LTy+66heKKTnTPzmXfz9ysUq5+ZF1TMWaa7u2LWow2gvVQbtTU11LkaL4vQY9U5ssT14PRlC5S/WTisrNcnLhUpKq+Nz/4UZCszAIWpWKkhUqNH9n3akPEdSt1T62lNob07MxPFp8eCCPccWfxX+9mVZQdRQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au; spf=pass smtp.mailfrom=ellerman.id.au; dkim=pass (2048-bit key) header.d=ellerman.id.au header.i=@ellerman.id.au header.b=R3WKrDKY; arc=none smtp.client-ip=150.107.74.76 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ellerman.id.au Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ellerman.id.au header.i=@ellerman.id.au header.b="R3WKrDKY" 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: 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