topic Re: P1010 platform kexec feature support in QorIQ

P1010 platform kexec feature support

qingshanli — Thu, 06 Aug 2015 04:55:17 GMT

I am use p1010 cpu and SDK version is 1.5. Now i test kexec feature on this platform with below command:

kexec --load --initrd=/tmp/initrd --

append="console=ttyS0,115200" /tmp/kernel

umount -ar

kexec --exec

after commands execute finish, the console just print info:

Starting new kernel

Bye!

and then the cpu system looks like freeze,and console don't

have any information output.

I further debug source code and found "kexec --exec" final call

function default_machine_kexec

(arch/powerpc/kernel/machine_kexec_32.c)

, execute below codes

....

/* now call it */

62 rnk = (relocate_new_kernel_t) reboot_code_buffer;

63 (*rnk)(page_list, reboot_code_buffer_phys, image-

>start);

and then cpu looks like freeze.

I don't know how to debug it and please help confirm it

whether this situation is SDK bug.

P.S

/tmp/initrd is initrd file

/tmp/kernel is elf vmlinux file

in uboot mode i can use initrd and kernre file can bootup cpu

system, so the two file is correct.

Re: P1010 platform kexec feature support

yipingwang — Thu, 06 Aug 2015 09:37:39 GMT

Hello Qingshan,

Please also provide Kernel configuration files for both original Kernel and dump capture Kernel.

Thanks,

Yiping

Re: P1010 platform kexec feature support

qingshanli — Thu, 06 Aug 2015 10:03:06 GMT

hi yiping

both kernel use the same config file

Re: P1010 platform kexec feature support

scottwood — Thu, 06 Aug 2015 20:19:17 GMT

While there is some code present for kexec, it's not currently a supported/tested feature of the SDK. If you need support for this, let your sales/FAE contact know.

Re: P1010 platform kexec feature support

qingshanli — Fri, 07 Aug 2015 05:37:30 GMT

hi scott

your reply mention "some codes present for kexec", whether you can offer those codes to me so i can test kexec feature on p1010 platform?

Re: P1010 platform kexec feature support

scottwood — Fri, 07 Aug 2015 20:11:11 GMT

I'm referring to the code that is already in the kernel. What I'm saying is that somebody worked on it in the past, but I don't think it is currently expected to work.

Re: P1010 platform kexec feature support

qingshanli — Mon, 10 Aug 2015 02:43:06 GMT

hi Scott

I test kexec feature on 3.9.6 Kernel and found it works. But 3.9.6 kernel is not my favorite kernel version. I can merge some codes form 3.9.6 to 3.8.13 for 3.8.13 can support kexec feature but i don't know how to start it. Whether you can help me to achieve it?