From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50849) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VeRDT-0007b9-0j for qemu-devel@nongnu.org; Thu, 07 Nov 2013 10:09:56 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VeRDJ-0002iv-Ia for qemu-devel@nongnu.org; Thu, 07 Nov 2013 10:09:50 -0500 Received: from mx1.redhat.com ([209.132.183.28]:49252) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VeRDJ-0002hi-9t for qemu-devel@nongnu.org; Thu, 07 Nov 2013 10:09:41 -0500 Message-ID: <527BACB6.2090305@redhat.com> Date: Thu, 07 Nov 2013 16:07:34 +0100 From: Paolo Bonzini MIME-Version: 1.0 References: <1383820884-29596-1-git-send-email-marcel.a@redhat.com> <527B9EE3.3030507@redhat.com> <20131107150501.GA3976@redhat.com> In-Reply-To: <20131107150501.GA3976@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH for-1.7 v2 0/8] fix address space size issue List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Michael S. Tsirkin" Cc: peter.maydell@linaro.org, ehabkost@redhat.com, Marcel Apfelbaum , qemu-devel@nongnu.org, jan.kiszka@siemens.com, agraf@suse.de, lcapitulino@redhat.com, aliguori@amazon.com, afaerber@suse.de Il 07/11/2013 16:05, Michael S. Tsirkin ha scritto: >> > So, ack for patch 5-7-8, which should also be enough to fix the problem >> > that Luiz reported. > Not at all. As long as exec.c ignores high bits, any access > there will end up in the wrong region. ... unless it happens to be the correct region because the whole 2^64-bit range is covered by a single region. This is what happens for IOMMUs. Paolo > We might not get a crash but we'll get guest memory corruption.