From owner-freebsd-arm@freebsd.org  Tue Mar 14 14:50:53 2017
Return-Path: <owner-freebsd-arm@freebsd.org>
Delivered-To: freebsd-arm@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 80286D0B580
 for <freebsd-arm@mailman.ysv.freebsd.org>;
 Tue, 14 Mar 2017 14:50:53 +0000 (UTC)
 (envelope-from andrew@tao11.riddles.org.uk)
Received: from lungold.riddles.org.uk (lungold.riddles.org.uk [82.68.208.19])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256
 bits)) (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 34131F17;
 Tue, 14 Mar 2017 14:50:52 +0000 (UTC)
 (envelope-from andrew@tao11.riddles.org.uk)
Received: from [192.168.127.1] (port=63286 helo=caithnard.riddles.org.uk)
 by lungold.riddles.org.uk with esmtps
 (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.88 (FreeBSD))
 (envelope-from <andrew@tao11.riddles.org.uk>)
 id 1cnnmc-000DnB-TA; Tue, 14 Mar 2017 14:50:42 +0000
Received: from [127.0.0.1] (port=31751 helo=caithnard.riddles.org.uk)
 by caithnard.riddles.org.uk with esmtps
 (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89 (FreeBSD))
 (envelope-from <andrew@tao11.riddles.org.uk>)
 id 1cnnmc-0003qj-87; Tue, 14 Mar 2017 14:50:42 +0000
From: Andrew Gierth <andrew@tao11.riddles.org.uk>
To: Michal Meloun <melounmichal@gmail.com>
Cc: Konstantin Belousov <kostikbel@gmail.com>, mmel@freebsd.org,
 "freebsd-arm\@freebsd.org" <freebsd-arm@freebsd.org>
Subject: Re: Is CPUTYPE=cortex-A7 supposed to work?
In-Reply-To: <b56aeeb5-f619-3b44-efe7-848f2b98f3da@freebsd.org> (Michal
 Meloun's message of "Sun, 12 Mar 2017 09:17:35 +0100")
Message-ID: <87bmt353ct.fsf@news-spur.riddles.org.uk>
References: <871suc3nv8.fsf@news-spur.riddles.org.uk>
 <CANCZdfq4EwH+_9FVNai8s6Y-gdTjHJ8dNkJwSrnF+SAkdwvYdg@mail.gmail.com>
 <8737ely05c.fsf@news-spur.riddles.org.uk>
 <CANCZdfpftVHaPahTOP0vxB-FR+KtpqY9JMJr=F2DGifD0fhKMQ@mail.gmail.com>
 <87wpbxw3yd.fsf@news-spur.riddles.org.uk>
 <20170310174444.GN16105@kib.kiev.ua>
 <b56aeeb5-f619-3b44-efe7-848f2b98f3da@freebsd.org>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (berkeley-unix)
Date: Tue, 14 Mar 2017 14:50:23 +0000
MIME-Version: 1.0
Content-Type: text/plain
X-BeenThere: freebsd-arm@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: "Porting FreeBSD to ARM processors." <freebsd-arm.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arm/>
List-Post: <mailto:freebsd-arm@freebsd.org>
List-Help: <mailto:freebsd-arm-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 14 Mar 2017 14:50:53 -0000

>>>>> "Michal" == Michal Meloun <melounmichal@gmail.com> writes:

 Michal> ARM is still tier2, but I significantly prefer getcontextx()
 Michal> (or any other, backward compatible) way.

 Michal> Unfortunately, on armv6, the VFP part of kernel <-> userland
 Michal> interaction is broken from day 1. The struct fpreg is also
 Michal> wrong and I'm not sure if or how we can to fix this in
 Michal> compatible way.

Is there anything I can do to help make progress on this?

-- 
Andrew.