From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anthony Liguori Subject: Re: [PATCH/RFC 7/9] Virtual network guest device driver Date: Tue, 22 May 2007 08:08:43 -0500 Message-ID: <4652EB5B.8090501@codemonkey.ws> References: <200705211328.04565.arnd@arndb.de> <4651E8D1.4010208@us.ibm.com> <13426df10705211609j613032c6j373d9a4660f8ec6c@mail.gmail.com> <46523952.7070405@codemonkey.ws> <46524A79.8070004@codemonkey.ws> <46527CD9.5000603@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Jimi Xenidis , "jmk-zzFmDc4TPjtKvsKVC3L/VUEOCMrvLtNR@public.gmane.org" , Christian Borntraeger , mschwid2-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org, kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, Suzanne McIntosh To: Eric Van Hensbergen Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Eric Van Hensbergen wrote: > On 5/22/07, Avi Kivity wrote: >> Anthony Liguori wrote: >> >> >> >> In a PV environment why not just pass an initial cookie/hash/whatever >> >> as a command-line argument/register/memory-space to the underlying >> >> kernel? >> >> >> > >> > You can't pass a command line argument to Windows (at least, not >> easily >> > AFAIK). You could get away with an MSR/CPUID flag but then you're >> > relying on uniqueness which isn't guaranteed. >> > >> >> In the general case, you can't pass a command line argument to Linux >> either. kvm doesn't boot Linux; it boots the bios, which boots the boot >> sector, which boots grub, which boots Linux. Relying on the user to >> edit the command line in grub is wrong. >> > > I didn't think we were talking about the general case, I thought we > were discussing the PV case. It is still useful to use PV drivers with full virtualization so it's something that ought to be considered. Regards, Anthony Liguori > In the PV case, having bios/bootloader > is unnecessary overhead. To that same end, I don't see Windows in the > PV case unless they magically want to to coordinate PV standards with > us, in which case we certainly can negotiate a more sane discovery > mechanism. > > -eric > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/