Re: [Xen-devel] [PATCH v3] xen: Allow a default compiled-in command line using Kconfig

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Tue, 7 Mar 2017, Julien Grall wrote:
> Hi Stefano,
> 
> On 03/07/2017 07:54 PM, Stefano Stabellini wrote:
> > On Tue, 7 Mar 2017, Julien Grall wrote:
> > Given that upstream GRUB doesn't yet support booting Xen on ARM (without
> > any additional patches), I think that the ability to completely change
> > the command line from the EFI shell would be useful. Besides, although
> > it is not mandatory, I think it would be best not to unnecessarily
> > diverge from x86 in terms of EFI booting.
> 
> I don't consider x86 solution as granted for ARM, and I would have thought it
> was the same on your side given the change you requested for dom0_mem
> recently.

I agree. I am only saying that all things being equal, we might as well
keep compatibility. If nothing else, it will be easier to write docs.
The dom0_mem case is an example where things are not equal between x86
and arm, but the parameter still works similarly across the two archs.


> I still don't see a reason to override the command line option as usually the
> issue will not be because of the command line but the kernel itself. At least
> this is my experience on ARM so far.

I think it can be useful, even just for tests, especially given that
grub is still unable to boot Xen.


> Anyway, I am not going to argue on this. If you think it should be done, then
> it should be in a separate patch.

That would be best.

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