Re: [Minios-devel] About the ARM supports of Unikraft

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

Hi Wei,

see my ansers inline. I put the mailing list in CC. We should have 
technical discussions publicly.
On 26.01.2018 08:48, Wei Chen wrote:
> Hi Simon,
>
> I am reading the Unikraft code this week. Because the differences of ARM and 
> x86,
> For example, ARM may use different boot protocol 
> (Linux/Documentation/arm64/booting.txt)
> but x86 is using multiboot. I will add some changes to Unikraft code, Makefile 
> and folders.
Sure. You can use the available architectures switches on Makefile.uk in 
order to select different compilation units and flags (you can have a 
look to plat/xen/Makefile.uk).
What is the first platform and architecture you want to implement, is it 
KVM? In case you want to port code, please make sure that you get it 
from projects that do not conflict with the Unikraft's BSD license 
(means, Linux is out ;-) ).
> In this case, I think I'd better write a simple proposal before do it. I will 
> send this
> proposal in next week.
>
> BTW:
> Why the x86 code in arch folder is "x86_64" but in plat/kvm and plat/xen is 
> "x86"?
This is a good point. Please do not get confused, we may even change 
this. The original idea was that we only support x86_64 for now.
However, keeping the x86 folder in the platforms was a result of the 
porting we did from Mini-OS and Solo5. Especially, Mini-OS has code for 
32 and 64 bit guests (which differs at some minor places). Since we 
wanted to keep it open for the future to add support for 32bit x86 - we 
kept it there.
In case we add 32bit and it also differs minimally for the architecture 
folder, we might want to merge arch/x86_32 and arch/x86_64 to arch/x86.
You might need to do similar considerations for the ARM architectures 
and platforms.
> Regards,
> Wei Chen
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Thanks,

Simon

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