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 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 908D0C433E0 for ; Thu, 4 Jun 2020 17:24:04 +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 4EA6B206C3 for ; Thu, 4 Jun 2020 17:24:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4EA6B206C3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Authentication-Results: mail.kernel.org; spf=pass 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 49dCLV21zzzDqtj for ; Fri, 5 Jun 2020 03:24:02 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=permerror (SPF Permanent Error: Unknown mechanism found: ip:192.40.192.88/32) smtp.mailfrom=kernel.crashing.org (client-ip=63.228.1.57; helo=gate.crashing.org; envelope-from=segher@kernel.crashing.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) by lists.ozlabs.org (Postfix) with ESMTP id 49dCHD54zzzDqkx for ; Fri, 5 Jun 2020 03:21:12 +1000 (AEST) Received: from gate.crashing.org (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id 054HKsNM030263; Thu, 4 Jun 2020 12:20:54 -0500 Received: (from segher@localhost) by gate.crashing.org (8.14.1/8.14.1/Submit) id 054HKrBq030262; Thu, 4 Jun 2020 12:20:53 -0500 X-Authentication-Warning: gate.crashing.org: segher set sender to segher@kernel.crashing.org using -f Date: Thu, 4 Jun 2020 12:20:53 -0500 From: Segher Boessenkool To: Michal =?iso-8859-1?Q?Such=E1nek?= Subject: Re: ppc64le and 32-bit LE userland compatibility Message-ID: <20200604172053.GH31009@gate.crashing.org> References: <2047231.C4sosBPzcN@sheen> <20200602142337.GS25173@kitsune.suse.cz> <3aeb6dfe-ae23-42f9-ac23-16be6b54a850@www.fastmail.com> <20200602152724.GU25173@kitsune.suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200602152724.GU25173@kitsune.suse.cz> User-Agent: Mutt/1.4.2.3i X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: libc-alpha@sourceware.org, eery@paperfox.es, Daniel Kolesa , musl@lists.openwall.com, Will Springer , Palmer Dabbelt via binutils , via libc-dev , linuxppc-dev@lists.ozlabs.org, Joseph Myers Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, Jun 02, 2020 at 05:27:24PM +0200, Michal Suchánek wrote: > Naturally on POWER the first cpu that has LE support is POWER8 so you > can count on all other POWER8 features to be present. This is not true. The oldest CPU the ELFv2 ABI (and so, powerpc64le-linux) supports is POWER8, but most 6xx/7xx CPUs had a working LE mode already. There are very old ABIs that support LE as well. Segher