Re: 回复： [Xen ARM64] Save coredump log when xen/dom0 crash on ARM64?

Re: 回复： [Xen ARM64] Save coredump log when xen/dom0 crash on ARM64?

[Julien Grall]

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Hi,

On 03/07/2020 07:02, jinchen wrote:
> Thank you for your reply!
> 
> On 02/07/2020 02:41, jinchen wrote:
>  >> Hello xen experts:
>  >>
>  >> Is there any way to save xen and dom0 core dump log when xen or dom0
>  >> crash on ARM64 platform?
> 
>  >Usually all the crash stack trace (Xen and Dom0) should be output on the
>  >Xen Console.
> 
> But if I don't connect a debug serial and want to check the dump error 
> after reboot?
If you don't have debug serial always connected, then it will not get 
the logs.

> 
>  >>0„2 0„2 0„2 I find that the kdump seems can't run on ARM64 platform?
> 
>  >We don't have support for kdump/kexec on Arm in Xen yet.
> 
> I find the kdump seems the appropriate way to do this, but it doesn't 
> support xen arm64.
> 
>  >>0„2 0„2 0„2 Are there any patches or other way to achive this goal?
> 
>  >I am not aware of any patches, but they would be welcomed.
> 
>  >For other way, it depends what exactly you expect. Do you need more than
>  >the stack trace?
> 
> The stack trace will be ok, if other infomantion can be save will be 
> better (like memory/vcpu/domain, etc.)

Kexec is probably the way to go. I would be happy to review the patches 
for Xen upstream if you are up to provide an implementation.

Cheers,

-- 
Julien Grall