From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=59195 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PJ0TW-00023h-91 for qemu-devel@nongnu.org; Thu, 18 Nov 2010 04:08:15 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PJ0TV-0007Ev-9j for qemu-devel@nongnu.org; Thu, 18 Nov 2010 04:08:14 -0500 Received: from mx1.redhat.com ([209.132.183.28]:25625) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PJ0TV-0007Ek-00 for qemu-devel@nongnu.org; Thu, 18 Nov 2010 04:08:13 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oAI98Bj6019128 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 18 Nov 2010 04:08:11 -0500 Date: Thu, 18 Nov 2010 11:08:02 +0200 From: "Michael S. Tsirkin" Subject: Re: [Qemu-devel] Re: [PATCH] spice: add qxl device Message-ID: <20101118090802.GE16832@redhat.com> References: <1288704898-30234-1-git-send-email-kraxel@redhat.com> <20101116174306.GC4077@redhat.com> <4CE3D875.9020701@redhat.com> <20101117135842.GA13690@redhat.com> <4CE3F2CD.4030701@redhat.com> <20101117164244.GE27909@redhat.com> <4CE40AAF.7090202@redhat.com> <20101117180008.GE29556@redhat.com> <20101118080935.GW7948@redhat.com> <4CE4E22A.6040303@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4CE4E22A.6040303@redhat.com> List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerd Hoffmann Cc: qemu-devel@nongnu.org, Gleb Natapov On Thu, Nov 18, 2010 at 09:22:02AM +0100, Gerd Hoffmann wrote: > On 11/18/10 09:09, Gleb Natapov wrote: > >On Wed, Nov 17, 2010 at 08:00:08PM +0200, Michael S. Tsirkin wrote: > >>>>> If so: does qemu > >>>>>emulate this correctly? > >>>> > >>>>It mostly does. > >>> > >>>I doubt it actually enables/disables the legacy vga ports. > >> > >>I'll check when I have the time. We can fix it if it doesn't, > >> > >So many guests (all of them?) just assume that vga ports and > >framebuffer is there. So what "fixing" this will buy us? > > Nothing? > > Certainly not for the qemu standard vga. The only way for guests is > to drive that one is via legacy vga ports and vesa vga bios. > Hotplug is never ever going to work here. > Also the vga memory window @ 0xa0000 with the piix chipset > interactions is good for some extra fun ... > > cirrus might be fixable to be hotpluggable. It also can be > programmed via mmio bar instead of legacy vga ports, so having two > cirrus cards in one system might be possible to get work. I doubt > it is worth the trouble though. We will need to fix this for proper pci memory management, anyway. > I still think that vga cards should simply be flagged to be not > hot-pluggable. > > cheers, > Gerd Send a patch. -- MST