Xen devel - May 2013 - Prebuilt kernel for Dom0, Xen ARM64, Foundation Model

Could somebody recommend the best way to use Foundation Model with Xen
ARM64? Today I am using the "skanky" approach mentioned by Ian
Campbell:

fv8 --image xen.gz --data zimage.img@0x80400000

After a few fixes to the device tree I made it to "LOADING DOM0" but
not
much farther. Is there a prebuilt Aarch64 kernel that sure works as Dom0
(on Foundation Model)?

Maxim


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On Sun, 2013-05-19 at 16:44 +0300, Maxim Kharchenko
wrote:
> Could somebody recommend the best way to use Foundation Model with Xen
> ARM64? Today I am using the "skanky" approach mentioned by Ian
> Campbell:
> 
> fv8 --image xen.gz --data zimage.img@0x80400000
> 
> 
> After a few fixes to the device tree I made it to "LOADING DOM0"
but
> not much farther. Is there a prebuilt Aarch64 kernel that sure works
> as Dom0 (on Foundation Model)?
The Foundation model is not yet completely supported, it''s on my TODO
list.

The main issue at the minute is a random guest abort during page table
setup, which goes away if I make a pointless nop hypercall early in
Linux''s head.S. Sadly I can''t reproduce this on the Fast
Models which
makes debugging a little tricky.

It also sounds like you might be trying to use a 64 bit kernel. That
patch series did not make it for 4.3 so the stuff in the Xen master
branch won''t support it. To date I''ve only ever tried a 32-bit
dom0
running on a 64-bit Xen on the foundation model.

Ian.

Ian, you mentioned git://xenbits.xen.org/people/ianc/linux.git in your old
message.
Is it still valid? I cannot clone it. That repo + attached config - is it a
worthy recipe
for a working Dom0 kernel?

Maxim

On Mon, May 20, 2013 at 11:46 AM, Ian Campbell
<Ian.Campbell@citrix.com>wrote:
> On Sun, 2013-05-19 at 16:44 +0300, Maxim Kharchenko wrote:
> > Could somebody recommend the best way to use Foundation Model with Xen
> > ARM64? Today I am using the "skanky" approach mentioned by
Ian
> > Campbell:
> >
> > fv8 --image xen.gz --data zimage.img@0x80400000
> >
> >
> > After a few fixes to the device tree I made it to "LOADING
DOM0" but
> > not much farther. Is there a prebuilt Aarch64 kernel that sure works
> > as Dom0 (on Foundation Model)?
>
> The Foundation model is not yet completely supported, it''s on my
TODO
> list.
>
> The main issue at the minute is a random guest abort during page table
> setup, which goes away if I make a pointless nop hypercall early in
> Linux''s head.S. Sadly I can''t reproduce this on the Fast
Models which
> makes debugging a little tricky.
>
> It also sounds like you might be trying to use a 64 bit kernel. That
> patch series did not make it for 4.3 so the stuff in the Xen master
> branch won''t support it. To date I''ve only ever tried a
32-bit dom0
> running on a 64-bit Xen on the foundation model.
>
> Ian.
>
>
>

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Please don''t top post.

On Mon, 2013-05-20 at 13:45 +0300, Maxim Kharchenko
wrote:
> Ian, you mentioned git://xenbits.xen.org/people/ianc/linux.git in your
> old message.
> Is it still valid? I cannot clone it. That repo + attached config - is
> it a worthy recipe for a working Dom0 kernel?
I''m afraid I don''t know which old message you are referring
to.

My linux.git still seems to be there as far as I can tell.

Just to reiterate, I have never tried arm64 dom0 on the Foundation
Model. You are treading into unknown territory if you pursue this path.

Ian.