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Re: Qemu-PPC problems (was [Qemu-devel] Just to add one single point)
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 |
User-agent: |
KMail/1.9.1 |
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...
- Re: [Qemu-devel] Just to add one single point, (continued)
- Re: [Qemu-devel] Just to add one single point, Mike Frysinger, 2007/04/08
- Re: [Qemu-devel] Just to add one single point, J. Mayer, 2007/04/09
- Re: [Qemu-devel] Just to add one single point, Rob Landley, 2007/04/09
- Re: [Qemu-devel] Just to add one single point, J. Mayer, 2007/04/09
- Re: [Qemu-devel] Just to add one single point, Rob Landley, 2007/04/11
- Re:Qemu-PPC problems (was [Qemu-devel] Just to add one single point), J. Mayer, 2007/04/12
- Re: Qemu-PPC problems (was [Qemu-devel] Just to add one single point), Jason Wessel, 2007/04/12
- Re: Qemu-PPC problems (was [Qemu-devel] Just to add one single point), Jason Wessel, 2007/04/12
- Re: Qemu-PPC problems (was [Qemu-devel] Just to add one single point), J. Mayer, 2007/04/12
- Re: Qemu-PPC problems (was [Qemu-devel] Just to add one single point), Jason Wessel, 2007/04/12
- Re: Qemu-PPC problems (was [Qemu-devel] Just to add one single point),
Rob Landley <=
- Re: Qemu-PPC problems (was [Qemu-devel] Just to add one single point), Rob Landley, 2007/04/18
- Re: Qemu-PPC problems (was [Qemu-devel] Just to add one single point), Rob Landley, 2007/04/14