Kexec on arm64

[Geoff Levand]

Hi Arun,

On Mon, 2014-08-04 at 15:46 +0530, Arun Chandran wrote:
> The latest kexec code is working fine in LE/BE mode in UP configuration.
> 
> I had to change kexec-tools code a bit to make sure that "kexec -l"
> is not putting dtb at an area where kernel is building its initial page
> tables.

OK, I'll add in code to handle this.

> Now before trying SMP configuration I want to know whether the below "kexec -e"
> scenarios are valid(required)?
> 
> 1st stage                                  |               2nd stage
> ---------------------------------------------------------------------------------------------
> LE UP                                      |               BE UP
> LE UP                                      |               BE SMP
> LE UP                                      |               LE SMP
> LE SMP                                   |               LE UP
> LE SMP                                   |               BE UP
> LE SMP                                   |               BE SMP

Kexec should work for all combinations of kernel options.  A
bootloader (1st stage) may want to be UP, and custom crash
dump kernels (2nd stage) are generally UP.  UP->UP may have
limited use.  I think all these listed are important to test
though, and going the other way also, so BE-SMP->LE-SMP for
example.

-Geoff