Could kernel support kexec on PPC64(e6500)?

[liu.song11 at zte.com.cn]

Hi, Baoquan

Follow your advice，I found --reuse-cmdline appear could not work well which will
print usage message.

My board is PPC64(e6500 PPC_BOOK3E), maybe kexec couldn't support this type?


Supported kernel file types and options:
elf-ppc64
     --command-line=<Command line> command line to append.
     --append=<Command line> same as --command-line.
     --ramdisk=<filename> Initial RAM disk.
     --initrd=<filename> same as --ramdisk.
     --devicetreeblob=<filename> Specify device tree blob file.
     --dtb=<filename> same as --devicetreeblob.

Regards



From:	Baoquan He <bhe at redhat.com>
To:	liu.song11 at zte.com.cn,
Cc:	kexec at lists.infradead.org
Date:	2014-12-18 10:03
Subject:	Re: Could kernel support kexec on PPC64(e6500)?



On 12/18/14 at 08:46am, liu.song11 at zte.com.cn wrote:
>
> Hi,
>
> My board is PPC64(e6500 series).When I use kexec-tools, I do the following operations,
> then the kernel panic.
>
> 1. ./kexec -l ./vmlinux --initrd=/ramdisk.bin    (segments load right)

Please try with below command again, you had better get cmdline options from
1st kernel.
 ./kexec -l ./vmlinux --initrd=/ramdisk.bin --reuse-cmdline

Let me know if it helps or any new questions.


> 2. ./kexec -e
>
> Then the kernel panic in kexec_sequence. I check NIP is point at mtmsrd r3,1
> which in kexec_sequence（misc_64.S）. I have no idea on this fault, and need
> some help.
>
> Regards
> --------------------------------------------------------------------------------------
> Starting new kernel
> Oops: Exception in kernel mode, sig: 4 [#1]
> CoreNet Generic
> Modules linked in:
> CPU: 0 PID: 963 Comm: kexec Not tainted 3.10.55-EMBSYS-CGEL-5.01.20.P0 #2
> task: c000000006408300 ti: c000000000af8000 task.ti: c0000000753dc000
> NIP: c000000000015bf0 LR: c0000000000243f8 CTR: 0000000000000000
> REGS: c000000000afbc60 TRAP: 0700   Not tainted  (3.10.55-EMBSYS-CGEL-5.01.20.P0)
> MSR: 0000000080021000 <CE,ME>  CR: 24022480  XER: 00000000
> SOFTE: 0
>
> GPR00: 0000000000000000 c000000000afbee0 c000000000af8b88 8002100080021000
> GPR04: 000000000178f600 c0000000753ccc00 c0000000753cd000 c000000000a6f240
> GPR08: c00000000256c4d8 00000000000753cd c000000000000000 0000000000001b08
> GPR12: 0000000022022444 c000000000b0f080 0000000000000001 ffffffffffffffff
> GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> GPR20: 0000000000000000 0000000000000002 0000000000000001 0000000000000001
> GPR24: 0000000000000001 0000000000000000 c00000000256c4d8 c000000000a6f240
> GPR28: c0000000753cd000 c0000000753ccc00 000000000178f600 c000000000afbf90
> NIP [c000000000015bf0] .kexec_sequence+0x5c/0xac
> LR [c0000000000243f8] .default_machine_kexec+0x128/0x190
> Call Trace:
> Instruction dump:
> fb41ffd0 fb21ffc8 f821ff51 7c7f1b78 7c9e2378 7cbd2b78 7cdc3378 7cfb3b78
> 7d1a4378 a32d0030 7c6000a6 5463045e <7c610164> 7fa3eb78 4800e519 4bffff71
> ---[ end trace 70e6c52cd522dd05 ]---
>
> Kernel panic - not syncing: Fatal exception in interrupt
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