From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NKezZ-00080l-6c for qemu-devel@nongnu.org; Tue, 15 Dec 2009 16:31:37 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1NKezS-0007w0-9M for qemu-devel@nongnu.org; Tue, 15 Dec 2009 16:31:34 -0500 Received: from [199.232.76.173] (port=48238 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NKezS-0007vt-5V for qemu-devel@nongnu.org; Tue, 15 Dec 2009 16:31:30 -0500 Received: from mail-gx0-f223.google.com ([209.85.217.223]:45614) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1NKezS-0003VI-23 for qemu-devel@nongnu.org; Tue, 15 Dec 2009 16:31:30 -0500 Received: by gxk23 with SMTP id 23so387391gxk.2 for ; Tue, 15 Dec 2009 13:31:29 -0800 (PST) Message-ID: <4B28002D.6060502@codemonkey.ws> Date: Tue, 15 Dec 2009 15:31:25 -0600 From: Anthony Liguori MIME-Version: 1.0 Subject: Re: Proper support for PCI-based option rom loading (was Re: [Qemu-devel] Re: qdev property bug?) References: <4B264AF1.6060802@codemonkey.ws> <7FB8DD1225E54176BCAF5523B6AEA89B@FSCPC> <4B26931E.4000101@codemonkey.ws> <20091214194210.GB6150@redhat.com> <4B269933.3010906@codemonkey.ws> <20091214202019.GF6150@redhat.com> <4B26A0DE.5000304@redhat.com> <20091214203428.GI6150@redhat.com> <20091214203603.GJ6150@redhat.com> <4B26A3B2.2030006@codemonkey.ws> <20091214205141.GC6398@redhat.com> <4B26F678.4010603@codemonkey.ws> <4B27541F.9020603@redhat.com> <4B278C34.6080401@codemonkey.ws> In-Reply-To: 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: Sebastian Herbszt Cc: "Michael S. Tsirkin" , glommer@redhat.com, qemu-devel@nongnu.org, Alexander Graf , Kevin O'Connor , Gerd Hoffmann Sebastian Herbszt wrote: > Anthony Liguori wrote: >> Gerd Hoffmann wrote: >>> I'm more worried about the CONFIG_OPTIONROMS_DEPLOYED patches for >>> seabios, although I don't fully understand what they are doing. >>> There are non-pci option roms (linuxboot, multiboot, extboot) which >>> qemu will continue to deploy the way roms are deployed today. >> >> That's a good point. Need to think about how to best handle that. >> SeaBIOS supports up to two static option roms so maybe what we need >> to do is make use of that mechanism for things like linuxboot/extboot. > > Keep loading custom roms (e.g. from -option-rom) with rom_add_file > starting at 0xc8000. > Modify SeaBIOS to scan the memory range for pre-deployed option roms > before deploying > PCI roms. SeaBIOS will find the last pre-deployed rom and have a > starting address for > deploying PCI roms. This will keep ISA option roms working. If we make -option-rom appear through a PCI device, then DDIM will work properly for those roms. Also, it would be nice if Linux boot used a PCI device instead of fw_cfg to load the kernel into memory. Regards, Anthony Liguori