From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35753) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bDqUF-0006rZ-Tz for qemu-devel@nongnu.org; Fri, 17 Jun 2016 05:54:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bDqUE-0002wN-2f for qemu-devel@nongnu.org; Fri, 17 Jun 2016 05:54:50 -0400 Received: from mail-wm0-x232.google.com ([2a00:1450:400c:c09::232]:36931) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bDqUD-0002wI-Rf for qemu-devel@nongnu.org; Fri, 17 Jun 2016 05:54:50 -0400 Received: by mail-wm0-x232.google.com with SMTP id a66so93670904wme.0 for ; Fri, 17 Jun 2016 02:54:49 -0700 (PDT) Sender: Paolo Bonzini References: <1466097133-5489-1-git-send-email-dgilbert@redhat.com> <1466097133-5489-5-git-send-email-dgilbert@redhat.com> <20160616202449.GY18662@thinpad.lan.raisama.net> <20160617081505.GA2273@work-vm> <20160617093737.GF2273@work-vm> From: Paolo Bonzini Message-ID: <7c40bc29-86db-ab46-b434-90aba5dbc31a@redhat.com> Date: Fri, 17 Jun 2016 11:54:45 +0200 MIME-Version: 1.0 In-Reply-To: <20160617093737.GF2273@work-vm> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 4/5] x86: Allow physical address bits to be set List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Dr. David Alan Gilbert" , Eduardo Habkost Cc: aarcange@redhat.com, qemu-devel@nongnu.org On 17/06/2016 11:37, Dr. David Alan Gilbert wrote: >>> The existing 40-bit default looks like a problem for 36-bit >>> > > systems. Do you know what kind of systems have 36 bits only? Only >>> > > old ones, or recent ones too? If only old ones, how old? >> > >> > My Sandy Bridge (~2.5 year old) laptop is 36 bits; I've seen >> > some other single-socket 39bit machines (Ivy bridge and I think newer). > and it looks like the single socket Xeons are as well; Xeon E3-1225 > I just found has 36 bit physical. The Xeon E3 is really little more than a Core i7 (for example it doesn't have APICv). Laurent checked a single-socket Sandy Bridge Xeon E5-1620 and it has 46. Paolo