$ cp arch/powerpc/configs/pmac32_defconfig .config
$ make menuconfig ARCH=powerpc
seems to work. I'm not sure what default config is taken by default, but
apparently one of the KVM constraints isn't fulfilled. Since you want to build
a kernel for a pmac32 anyways, just take that config as the basis or use the
one from a VM you already have working :).
Alex
I tried to build kernel image for powerpc-750
u...@user:~/project/kvm$ cp arch/powerpc/configs/pmac32_defconfig .config
u...@user:~/project/kvm$ make ARCH=powerpc menuconfig
[I selected "KVM support for PowerPC book3s_32 processors" under virtualization
menu. I have attached the final .config file]
u...@user:~/project/kvm$ make ARCH=powerpc CROSS_COMPILE=powerpc-750-linux-gnu-
[I get this error]
CHK include/linux/version.h
CHK include/generated/utsrelease.h
CALL scripts/checksyscalls.sh
CHK include/generated/compile.h
CALL arch/powerpc/kernel/systbl_chk.sh
CALL arch/powerpc/kernel/prom_init_check.sh
AS arch/powerpc/kvm/fpu.o
arch/powerpc/kvm/fpu.S: Assembler messages:
arch/powerpc/kvm/fpu.S:244: Error: Unrecognized opcode: `frsqrtes.'
arch/powerpc/kvm/fpu.S:250: Error: Unrecognized opcode: `fre.'
arch/powerpc/kvm/fpu.S:259: Error: Unrecognized opcode: `fcpsgn.'
make[1]: *** [arch/powerpc/kvm/fpu.o] Error 1
make: *** [arch/powerpc/kvm] Error 2
This means that your assembler doesn't understand some of the floating point
instructions in the paired single emulation code. Since you don't need that
code anyways, just comment them out.
Thanks a lot, Alex. After debugging some more errors, I was finally able
to compile it.
u...@user:~/kvm$ make distclean
u...@user:~/kvm$ cp arch/powerpc/configs/pmac32_defconfig .config
u...@user:~/kvm$ make ARCH=powerpc menuconfig
[I selected "KVM support for PowerPC book3s_32 processors" under
virtualization menu.]
u...@user:~/kvm$ make ARCH=powerpc CROSS_COMPILE=powerpc-750-linux-gnu-
u...@user:~/kvm$ make ARCH=powerpc CROSS_COMPILE=powerpc-750-linux-gnu-
modules
Then, I mounted the qemu-system-ppc image "debian_lenny_powerpc.raw".
u...@user:/$ losetup /dev/loop0 debian_lenny_powerpc.raw
u...@user:/$ kpartx -a /dev/loop0
u...@user:/$ mount /dev/mapper/loop0p3 /mnt/image2
u...@user:/$ mount /dev/mapper/loop0p2 /mnt/image2/boot/
u...@user:~/kvm$ sudo make ARCH=powerpc
CROSS_COMPILE=powerpc-750-linux-gnu- INSTALL_NOD_PATH="/mnt/image2"
modules_install
[Replaced /boot/vmlinux with the generated vmlinux]
u...@user:~/kvm$ cp vmlinux /mnt/image2/boot/vmlinux
And, on booting that image [debian_lenny_powerpc.raw], I can see the new
kernel image.
# uname -r
2.6.37-rc6+
But still, I cannot find the kvm module. File kvm.ko is not present
inside "lib/modules/2.6.37-rc6+/"
# modprobe kvm
FATAL: Module kvm not found.
Am I missing something? How do I build kvm module ?
Thanks,
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