From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Jones Subject: Re: [PATCH RFC 6/7] ARM64: KVM: Support heterogeneous system Date: Wed, 15 Mar 2017 15:06:33 +0100 Message-ID: <20170315140633.jtultotyihql7qlr@kamzik.brq.redhat.com> References: <1484559214-2248-1-git-send-email-zhaoshenglong@huawei.com> <1484559214-2248-7-git-send-email-zhaoshenglong@huawei.com> <20170128145551.sknp447ieue56xgo@hawk.localdomain> <20170315115044.GO1277@cbox> <20170315125113.erfl2gk6fwmbccsn@kamzik.brq.redhat.com> <20170315133645.GQ1277@cbox> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id A201E400E9 for ; Wed, 15 Mar 2017 10:05:03 -0400 (EDT) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id n02iGuDatMob for ; Wed, 15 Mar 2017 10:05:02 -0400 (EDT) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 95A5340019 for ; Wed, 15 Mar 2017 10:05:02 -0400 (EDT) Content-Disposition: inline In-Reply-To: <20170315133645.GQ1277@cbox> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: Christoffer Dall Cc: marc.zyngier@arm.com, qemu-arm@nongnu.org, wu.wubin@huawei.com, kvmarm@lists.cs.columbia.edu List-Id: kvmarm@lists.cs.columbia.edu On Wed, Mar 15, 2017 at 02:36:45PM +0100, Christoffer Dall wrote: > > If QEMU wants to know > > whether or not the host it's running on is heterogeneous, then > > it can just query sysfs, rather than ask KVM. > > > > Can it? Is this information available in a reliable way from userspace? I don't know much (anything) about it, but, afaict, yes. See https://lkml.org/lkml/2017/1/19/380 > > > I'm sure I missed some aspect of this discussion though. > > > > Me too. As we discussed, it's probably time to try and hash out a fresh > > design doc. It'd be good to get a clear design agreed upon before > > returning to the patches. > > > > Yes, it's on my list. I'm happy to help with this, even to take a stab at the first draft. Just let me know if you or Shannon prefer to do the draft yourselves. If you don't have a preference, then I can start working on it pretty soon. Thanks, drew