Re: [Xen-devel] XEN tools for ARM64 build issue

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Nov 25, 2016 at 03:30:44PM +0000, Julien Grall wrote:
> Hi all,
> 
> On 23/11/16 10:47, Jan Beulich wrote:
> >>>>On 23.11.16 at 11:29, <andrii.anisov@xxxxxxxxx> wrote:
> >>Building latest XEN master branch
> >>(58bd0c7985890e0292212f94a56235228a3445c3) for salvator-x platform using
> >>the same yocto as here
> >>https://wiki.xen.org/wiki/Xen_ARM_with_Virtualization_Extensions/Salvator-X
> >>I've
> >>faced following issue:
> >>
> >>Maximum error count (200) exceeded
> >>
> >>/home/aanisov/DEV/salvatorx-new/build/tmp/work/aarch64-poky-linux/xen/4.8.0+
> >>gitAUTOINC+58bd0c7985-r0/git/tools/libxl/dsdt_anycpu_arm.asl
> >>     3:         OperationRegion ( MSUM, SystemMemory, \_SB.MSUA, 1 )
> >>Error    4084 -
> >>
> >>                         Object does not exist ^  (\_SB.MSUA)
> >
> >Looking at the source I see that this statement gets included for
> >x86 only. Are you perhaps doing a cross build of the ARM tools
> >on an x86 host? If so, it looks like some work would be needed to
> >make that work (again? not sure if it ever worked), as there are
> >various build host architecture conditionals in mk_dsdt.c.
> 
> I gave a look at this error, I had in mind to replace all the #if
> defined(__*__) by the CONFIG_* equivalent.
> 
> However, the CONFIG_* are not available for the tools. I guess we need to
> add them in the tools config.h. Any opinions?

I would rather we limit the scope to libacpi.

How do you cross-compile tools?

If CONFIG_ARM_64 is usable within Makefile, we can do something like:

 MKDSDT_CFLAGS-$(CONFIG_ARM_64) = -DCONFIG_ARM_64
 MKDSDT_CFLAGS-$(CONFIG_X86) = -DCONFIG_X86

Then add MKDIST_CFLAGS-y to mkdsdt's build rune.

Change mkdsdt.c source code accordingly.


> 
> Cheers,
> 
> -- 
> Julien Grall

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