From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35631) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YzOoM-0004ab-IU for qemu-devel@nongnu.org; Mon, 01 Jun 2015 08:27:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YzOoI-0000ks-G8 for qemu-devel@nongnu.org; Mon, 01 Jun 2015 08:27:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56521) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YzOoI-0000kf-BX for qemu-devel@nongnu.org; Mon, 01 Jun 2015 08:27:18 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (Postfix) with ESMTPS id E9CDFC8369 for ; Mon, 1 Jun 2015 12:27:17 +0000 (UTC) Date: Mon, 1 Jun 2015 14:27:15 +0200 From: "Michael S. Tsirkin" Message-ID: <20150601142654-mutt-send-email-mst@redhat.com> References: <1432568042-19553-1-git-send-email-marcel@redhat.com> <1432568042-19553-24-git-send-email-marcel@redhat.com> <20150531181221.GJ5268@redhat.com> <556C2985.9000909@redhat.com> <1433158819.19671.23.camel@nilsson.home.kraxel.org> <20150601141532-mutt-send-email-mst@redhat.com> <1433161442.19671.27.camel@nilsson.home.kraxel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1433161442.19671.27.camel@nilsson.home.kraxel.org> Subject: Re: [Qemu-devel] [PATCH V7 23/24] apci: fix PXB behaviour if used with unsupported BIOS List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerd Hoffmann Cc: Marcel Apfelbaum , pbonzini@redhat.com, qemu-devel@nongnu.org On Mon, Jun 01, 2015 at 02:24:02PM +0200, Gerd Hoffmann wrote: > On Mo, 2015-06-01 at 14:17 +0200, Michael S. Tsirkin wrote: > > On Mon, Jun 01, 2015 at 01:40:19PM +0200, Gerd Hoffmann wrote: > > > On Mo, 2015-06-01 at 12:44 +0300, Marcel Apfelbaum wrote: > > > > On 05/31/2015 09:12 PM, Michael S. Tsirkin wrote: > > > > > On Mon, May 25, 2015 at 06:34:01PM +0300, Marcel Apfelbaum wrote: > > > > >> PXB does not work with unsupported bioses, but should > > > > >> not interfere with normal OS operation. > > > > >> We don't ship them anymore, but it's reasonable > > > > >> to keep the work-around until we update the bios in qemu. > > > > > > > > > > We already did, did we not? > > > > Yes, we did, but Gerd preferred to keep this patch around. > > > > Adding him to thread. > > > > > > seabios bundled with qemu isn't the only possible firmware. > > > > > > We have ovmf, coreboot, qboot. > > > > ovmf is especially interesting. Marcel, did you look at what > > happens with pxb and ovmf? > > > > > You might boot with old seabios for > > > whatever reasons (say bisecting down something). > > > > But then you won't have pxb, will you? > > Devices behind pxb wouldn't be working because they didn't got resources > assigned, yes. I mean that there's no way to get old seabios+pxb when bisecting. > But at least the resources for the primary root bus > devices would not be screwed up like they are without this patch (IIRC). > > cheers, > Gerd >