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" ... > 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. 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.
Ok, using a qemu CVS snapshot from this morning, I built 2.6.20.6 for powerpc using the config you attached to the message I'm replying to (ran make oldconfig on it and hit "enter", and then removed CONFIG_LOCALVERSION_AUTO, then built with "make ARCH=ppc CROSS_COMPILE=powerpc-" using the cross compiler I pointed to earlier which is configured for powerpc-unknown-linux.) Then ran the above qemu line, and qemu segfaulted trying to decompress the Linux kernel. (Is qemu supposed to segfault? I can reproduce this quite easily...) Thinking this might be the "decompresses to >4 megs" problem (your config produces a HUGE krenel), I then applied your patches to the kernel (the second is already there in .6, the first needed one hunk fixed up by hand)... Nope, still segfaults. > 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" > > There is a new regression between Apr 9 and Apr 10 in the QEMU CVS HEAD > where tcp checksums are failing again. :-( > > If it would help, I can certainly provide some of my zImage files which > run with several different 2.6.x kernels. This seems to be a qemu issue. (It really shouldn't segfault, no matter what the code it's emulating does.) What qemu version are you using to run this with? Rob -- Penguicon 5.0 Apr 20-22, Linux Expo/SF Convention. Bruce Schneier, Christine Peterson, Steve Jackson, Randy Milholland, Elizabeth Bear, Charlie Stross...
