some questions about elf_ppc64_load

[liu.song11 at zte.com.cn]

hi all，

I use kexec-tools-2.0.8 for ppc64, in fuction elf_ppc64_load prompt "Can't use ramdisk with device tree blob input".

I don't know why here ramdisk can't together with dtb,and need some help.

I also have some questions, when I just ./kexe -l vmlinux then ./kexec -e, will jump to second kernel sucessfully,

but without useful dtb, then device can't init correct. But, when I input ./kexec -l vmlinux --dtb=my.dtb , then

./kexec -e, the kernel couldn't work and crash in head_64.S, this problem also make me confused.

Thanks
Regards
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