From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=JEJ8=7P=lists.ozlabs.org=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
X-Spam-Level: 
X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no
	autolearn_force=no version=3.4.0
Received: from mail.kernel.org (mail.kernel.org [198.145.29.99])
	by smtp.lore.kernel.org (Postfix) with ESMTP id 5A0ADC433E0
	for <linuxppc-dev@archiver.kernel.org>; Tue,  2 Jun 2020 14:26:15 +0000 (UTC)
Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by mail.kernel.org (Postfix) with ESMTPS id 1084C206C3
	for <linuxppc-dev@archiver.kernel.org>; Tue,  2 Jun 2020 14:26:14 +0000 (UTC)
DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1084C206C3
Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de
Authentication-Results: mail.kernel.org; spf=tempfail smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org
Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])
	by lists.ozlabs.org (Postfix) with ESMTP id 49bvVB6Nk4zDqCt
	for <linuxppc-dev@archiver.kernel.org>; Wed,  3 Jun 2020 00:26:10 +1000 (AEST)
Authentication-Results: lists.ozlabs.org;
 spf=pass (sender SPF authorized) smtp.mailfrom=suse.de
 (client-ip=195.135.220.15; helo=mx2.suse.de; envelope-from=msuchanek@suse.de;
 receiver=<UNKNOWN>)
Authentication-Results: lists.ozlabs.org;
 dmarc=none (p=none dis=none) header.from=suse.de
Received: from mx2.suse.de (mx2.suse.de [195.135.220.15])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (No client certificate requested)
 by lists.ozlabs.org (Postfix) with ESMTPS id 49bvRN5HV0zDqSM
 for <linuxppc-dev@lists.ozlabs.org>; Wed,  3 Jun 2020 00:23:44 +1000 (AEST)
X-Virus-Scanned: by amavisd-new at test-mx.suse.de
Received: from relay2.suse.de (unknown [195.135.220.254])
 by mx2.suse.de (Postfix) with ESMTP id 080BFAE9D;
 Tue,  2 Jun 2020 14:23:42 +0000 (UTC)
Date: Tue, 2 Jun 2020 16:23:37 +0200
From: Michal =?iso-8859-1?Q?Such=E1nek?= <msuchanek@suse.de>
To: Joseph Myers <joseph@codesourcery.com>
Subject: Re: ppc64le and 32-bit LE userland compatibility
Message-ID: <20200602142337.GS25173@kitsune.suse.cz>
References: <2047231.C4sosBPzcN@sheen>
 <alpine.DEB.2.21.2006012119010.11121@digraph.polyomino.org.uk>
 <c821b608-f14f-4a68-bbec-b7b6c1d8bddc@www.fastmail.com>
 <alpine.DEB.2.21.2006012329420.11121@digraph.polyomino.org.uk>
 <b44b3aa7-f9cc-43e1-b2c4-0edb6ea06189@www.fastmail.com>
 <alpine.DEB.2.21.2006021334170.24059@digraph.polyomino.org.uk>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <alpine.DEB.2.21.2006021334170.24059@digraph.polyomino.org.uk>
User-Agent: Mutt/1.10.1 (2018-07-13)
X-BeenThere: linuxppc-dev@lists.ozlabs.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org>
List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>
List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev/>
List-Post: <mailto:linuxppc-dev@lists.ozlabs.org>
List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>
List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>
Cc: libc-alpha@sourceware.org, eery@paperfox.es,
 Daniel Kolesa <daniel@octaforge.org>, musl@lists.openwall.com,
 Will Springer <skirmisher@protonmail.com>,
 Palmer Dabbelt via binutils <binutils@sourceware.org>,
 via libc-dev <libc-dev@lists.llvm.org>, linuxppc-dev@lists.ozlabs.org
Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org
Sender: "Linuxppc-dev"
 <linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org>

On Tue, Jun 02, 2020 at 01:40:23PM +0000, Joseph Myers wrote:
> On Tue, 2 Jun 2020, Daniel Kolesa wrote:
> 
> > not be limited to being just userspace under ppc64le, but should be 
> > runnable on a native kernel as well, which should not be limited to any 
> > particular baseline other than just PowerPC.
> 
> This is a fairly unusual approach to bringing up a new ABI.  Since new 
> ABIs are more likely to be used on new systems rather than switching ABI 
> on an existing installation, and since it can take quite some time for all 
> the software support for a new ABI to become widely available in 
> distributions, people developing new ABIs are likely to think about what 
> new systems are going to be relevant in a few years' time when working out 
> the minimum hardware requirements for the new ABI.  (The POWER8 minimum 
> for powerpc64le fits in with that, for example.)
That means that you cannot run ppc64le on FSL embedded CPUs (which lack
the vector instructions in LE mode). Which may be fine with you but
other people may want to support these. Can't really say if that's good
idea or not but I don't foresee them going away in a few years, either.

Thanks

Michal