From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1HcpsK-00054B-N0 for qemu-devel@nongnu.org; Sat, 14 Apr 2007 17:33:40 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1HcpsJ-00053z-AF for qemu-devel@nongnu.org; Sat, 14 Apr 2007 17:33:40 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HcpsJ-00053w-2s for qemu-devel@nongnu.org; Sat, 14 Apr 2007 17:33:39 -0400 Received: from static-71-162-243-5.phlapa.fios.verizon.net ([71.162.243.5] helo=grelber.thyrsus.com) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1Hcpns-0007fi-5Z for qemu-devel@nongnu.org; Sat, 14 Apr 2007 17:29:04 -0400 From: Rob Landley Subject: Re: Qemu-PPC problems (was [Qemu-devel] Just to add one single point) Date: Sat, 14 Apr 2007 17:28:46 -0400 References: <1176026443.1516.176.camel@rapid> <1176364573.6333.25.camel@rapid> <461E551E.9030803@windriver.com> In-Reply-To: <461E551E.9030803@windriver.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200704141728.47425.rob@landley.net> Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org On Thursday 12 April 2007 11:49 am, Jason Wessel wrote: > J. Mayer wrote: > > On Wed, 2007-04-11 at 17:49 -0400, Rob Landley wrote: > > > >> qemu-system-ppc -M prep -nographic -kernel zImage-powerpc -append \ > >> "console=/dev/ttyS0" > >> > > > > You cannot append anything to the command line this way, with the PPC > > firmware... > > You can append options when using yaboot, not with the -kernel option. > > Then, you should use the CONFIG_CMDLINE kernel option to add the option > > you absolutely need to boot. > > > If you do not modify the prep loader, then it is impossible to pass > arguments or load a kernel that expands to > 4meg. With respect to > using an unmodified prep loader, you have to build the boot arguments > you want into the kernel itself with the .config file options. Any chance of pushing that loader patch back upstream? (At least into -mm?) > While I am sure folks have the objective to be able to boot something > that is not modified, my objective was to modify the kernel to work with > qemu until that first objective is met. If you use a 2.6.21rc candidate > you can use the attached patches to boot. I provided a .config file as > well. Applying said .config to 2.6.20.6 and running make oldconfig was... "interesting". Ah! You're using ARCH=ppc to build the kernel and I've been using ARCH=powerpc. I totally do not understand the difference between them, but I can adjust to that if it's a condition of making things work... (Switch _off_ CONFIG_LOCALVERSION_AUTO "Hang the build indefinitely waiting for git to do who knows what"...) Hey, I got a zImage.prep! > > The frame buffer is definitely broken, but I had not really > looked into why because I was more interested in simply using the ppc > instruction sets. > > Note I startup with the following and it works perfectly fine with my > modified kernels: > qemu-system-ppc -nographic -kernel zImage.prep -s -M prep -append > "console=ttyS0 ip=dhcp root=/dev/nfs nfsroot=10.0.2.2:/export/ppc rw > netdev=9,0x300,eth0" Uncompressing Linux... Segmentation fault. But hey, it's progress. (It got that far! This is a first for me.) This is using a 2-week old qemu cvs snapshot and not using the 2.6.21-rc you mentioned, and I haven't applied your patches yet, so I'll try all that next. But I got it to say "Uncompressing Linux..."! This is progress!) Thank you. Rob -- Penguicon 5.0 Apr 20-22, Linux Expo/SF Convention. Bruce Schneier, Christine Peterson, Steve Jackson, Randy Milholland, Elizabeth Bear, Charlie Stross...