From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47135) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZOLi7-0007LK-SQ for qemu-devel@nongnu.org; Sun, 09 Aug 2015 04:12:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZOLi3-0001Ud-Sd for qemu-devel@nongnu.org; Sun, 09 Aug 2015 04:12:03 -0400 Received: from mail-wi0-f170.google.com ([209.85.212.170]:35091) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZOLi3-0001UZ-Ml for qemu-devel@nongnu.org; Sun, 09 Aug 2015 04:11:59 -0400 Received: by wibxm9 with SMTP id xm9so105243051wib.0 for ; Sun, 09 Aug 2015 01:11:58 -0700 (PDT) References: <1438966995-5913-1-git-send-email-a.rigo@virtualopensystems.com> <1438966995-5913-6-git-send-email-a.rigo@virtualopensystems.com> <20150808124401.GA18166@aurel32.net> From: Alex =?utf-8?Q?Benn=C3=A9e?= In-reply-to: <20150808124401.GA18166@aurel32.net> Date: Sun, 09 Aug 2015 09:11:56 +0100 Message-ID: <871tfcnann.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Subject: Re: [Qemu-devel] [RFC v4 5/9] configure: Enable/disable new qemu_{ld, st} excl insns List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Aurelien Jarno Cc: mttcg@listserver.greensocs.com, claudio.fontana@huawei.com, Alvise Rigo , qemu-devel@nongnu.org, pbonzini@redhat.com, jani.kokkonen@huawei.com, tech@virtualopensystems.com Aurelien Jarno writes: > On 2015-08-07 19:03, Alvise Rigo wrote: >> Introduce the new --enable-tcg-ldst-excl configure option to enable the >> LL/SC operations only for those backends that support them. >> >> Suggested-by: Jani Kokkonen >> Suggested-by: Claudio Fontana >> Signed-off-by: Alvise Rigo >> --- >> configure | 21 +++++++++++++++++++++ >> 1 file changed, 21 insertions(+) > > We have seen that for this kind of patch, it's better to add support in > all backends, otherwise it takes ages to get all the backends converted. > I think you should involve the backend maintainers. I can try to provide > the corresponding patches for mips and ia64. We discussed this on the last MTTCG call and agree. However we will need help from the other TCG maintainers for the backends. The changes should be fairly mechanical though. However in the spirit of keeping trees building in the meantime should we change this from a configure option to just a static option for each given backend as it is converted? -- Alex Bennée