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=-0.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 F33AEC2D0EA for ; Wed, 8 Apr 2020 04:42:05 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 ADF9020747 for ; Wed, 8 Apr 2020 04:42:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="D+/+RvnF" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ADF9020747 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:55948 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jM2XM-0005DQ-PU for qemu-devel@archiver.kernel.org; Wed, 08 Apr 2020 00:42:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49251) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jM2We-0004hT-7o for qemu-devel@nongnu.org; Wed, 08 Apr 2020 00:41:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jM2Wc-0005I4-Lw for qemu-devel@nongnu.org; Wed, 08 Apr 2020 00:41:19 -0400 Received: from ozlabs.org ([2401:3900:2:1::2]:50795) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jM2Wb-0005E5-LJ; Wed, 08 Apr 2020 00:41:18 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 48xs6X4zWBz9sSq; Wed, 8 Apr 2020 14:41:08 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1586320868; bh=Mni4oCH1bLQ2KSyObvT0ICIz/ZsKltGRovkWC95CZH4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=D+/+RvnFRxcIFnPqKJjSpkz9r1/umkINLszCE7GrBaTj1h7lm2F3JTkcBmk3gvEFg 91zSDHITzmcIj/S7S+JWR4uEPmEljWPgPDE6XXcQ5x2PCwfW0XRdVornLvMaJ5PUUC Ms9A43YJ07VJORAPxOZoovPmFZ2fBdfqdk+Yo+js= Date: Wed, 8 Apr 2020 14:33:49 +1000 From: David Gibson To: Richard Henderson Subject: Re: [PATCH for-5.0?] linux-user/ppc: Fix padding in mcontext_t for ppc64 Message-ID: <20200408043349.GC304335@umbus.fritz.box> References: <20200407032105.26711-1-richard.henderson@linaro.org> <20200408021006.GB44664@umbus.fritz.box> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="GPJrCs/72TxItFYR" Content-Disposition: inline In-Reply-To: X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2401:3900:2:1::2 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alex.bennee@linaro.org, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, laurent@vivier.eu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --GPJrCs/72TxItFYR Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Apr 07, 2020 at 08:44:47PM -0700, Richard Henderson wrote: > On 4/7/20 7:10 PM, David Gibson wrote: > >> Should we in fact disable ppc64abi32? > >> I can't see how it could work enough to be useful as-is. > >=20 > > Yeah, I think so. Last time we had a problem in this area, I couldn't > > even figure out what ppc64abi32 was supposed to *be*, let alone what > > the use case for it is. Given that, it's hard to imagine it's been > > working (whatever that means) any time recently. >=20 > What it's *supposed* to be is a ppc32 binary running on a 64-bit cpu, e.g= =2E a > 32-bit binary on power7 with the kernel's compat syscalls. You get to do > native 64-bit arithmetic and have 32-bit pointers. Right, I guessed that from the name, but I couldn't find anything that explicitly confirmed that. > I guess there's a kind of a use case there somewhere, but it's rather nic= he, Extremely. > and someone has to care more than they have until now. >=20 >=20 > r~ >=20 --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. 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