From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NMIJX-0003L2-Pr for qemu-devel@nongnu.org; Sun, 20 Dec 2009 04:42:59 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1NMIJS-0003Go-85 for qemu-devel@nongnu.org; Sun, 20 Dec 2009 04:42:58 -0500 Received: from [199.232.76.173] (port=55224 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NMIJS-0003Gb-4c for qemu-devel@nongnu.org; Sun, 20 Dec 2009 04:42:54 -0500 Received: from mx1.redhat.com ([209.132.183.28]:53719) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1NMIJR-0000iD-Ke for qemu-devel@nongnu.org; Sun, 20 Dec 2009 04:42:53 -0500 Message-ID: <4B2DF198.3070509@redhat.com> Date: Sun, 20 Dec 2009 11:42:48 +0200 From: Avi Kivity MIME-Version: 1.0 Subject: Re: [Qemu-devel] cpuid problem in upstream qemu with kvm References: <20091214200002.GA27769@redhat.com> <4B2699BB.1090302@codemonkey.ws> <20091214201049.GD6150@redhat.com> <4B269D99.8080404@codemonkey.ws> <20091214203125.GH6150@redhat.com> <4B26A619.7070503@codemonkey.ws> <20091214211024.GD6100@redhat.com> <4B26B2F3.9080102@codemonkey.ws> <20091215142820.GA23472@redhat.com> <4B27C95E.5080200@codemonkey.ws> <20091215175650.GA25529@redhat.com> In-Reply-To: <20091215175650.GA25529@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Michael S. Tsirkin" Cc: Gleb Natapov , qemu-devel@nongnu.org On 12/15/2009 07:56 PM, Michael S. Tsirkin wrote: > > I see. > But unfortunately this bit has multiple meanings > for 64/32 bit, kvm does not know whether you will > run a 32 bit or a 64 bit program. > This is a cpu architecture bug. > > Correct. One bit is used for two separate features (syscall-32 and syscall-64). syscall-32 rarely matters because i386 guests use sysenter. It's only 32-on-64 guests that attempt to use syscall. -- error compiling committee.c: too many arguments to function