Could kernel support kexec on PPC64(e6500)?

[Baoquan He]

On 12/18/14 at 10:32am, liu.song11 at zte.com.cn wrote:
> 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.

Then just add a cmdline-line by --command-line="xxxx" which can be
copied from your /proc/cmdline. I am not sure if dtb is necessary.
Hope this can make it work.

> 
> 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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