From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NKf7Q-0005QV-IW for qemu-devel@nongnu.org; Tue, 15 Dec 2009 16:39:44 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1NKf7L-0005JV-VW for qemu-devel@nongnu.org; Tue, 15 Dec 2009 16:39:44 -0500 Received: from [199.232.76.173] (port=38835 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NKf7L-0005JC-Jv for qemu-devel@nongnu.org; Tue, 15 Dec 2009 16:39:39 -0500 Received: from mail.gmx.net ([213.165.64.20]:52197) by monty-python.gnu.org with smtp (Exim 4.60) (envelope-from ) id 1NKf79-000483-J3 for qemu-devel@nongnu.org; Tue, 15 Dec 2009 16:39:39 -0500 Message-ID: <2637964BA0394371A45A0970D489E5EA@FSCPC> From: "Sebastian Herbszt" 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> <4B28002D.6060502@codemonkey.ws> In-Reply-To: <4B28002D.6060502@codemonkey.ws> Subject: Re: Proper support for PCI-based option rom loading (was Re: [Qemu-devel] Re: qdev property bug?) Date: Tue, 15 Dec 2009 22:38:06 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Anthony Liguori Cc: "Michael S. Tsirkin" , glommer@redhat.com, qemu-devel@nongnu.org, Alexander Graf , Kevin O'Connor , Gerd Hoffmann Anthony Liguori wrote: > 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. What about isapc? Or (pci)pc with isa card? Keeping the possibility of having option roms pre-deployed also allows using Bochs BIOS until SeaBIOS has no more regressions. - Sebastian