Re: [Xen-devel] Issue with ARM: Network doesn't work in the guest

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 11/06/2013 10:12 AM, Stefano Stabellini wrote:
> On Wed, 30 Oct 2013, mail fetch wrote:
> > 2013/10/29, mail fetch <fetchmail.0104@xxxxxxxxx>:
> > > Hi all,
> > >
> > > I just saw a know bug from wiki that network doesn't work in guest in
> > > arndale board :
> > >
> > > Network doesn't work in the guest
> > >
> > > Contact: julien.grall@xxxxxxxxxx
> > > Status: In progress
> > > Description: Network doesn't work in the guest when an ehternet cable is
> > > plugged
> > > References: http://pastebin.com/gEP3HdCg
> > >
> > > What's the latest status?
> > >
> > > best regards
> > > Mail
> > Any comments?
> Sorry for the late reply. Usually we respond pretty quickly but you
> caught us between Xen Developer Summit and Linaro Connect: most Xen
> hackers were traveling. In fact Julien Grall is still AFK and he
> is the one that knows the answer.
>
> I think that the 1:1 workaround in dom0 (that is having pseudo-physical
> addresses == physical addresses for dom0) should fix it. Give a look at
Actually it's not enough. The problem is because when the balloon driver 
will release a page, Xen will populate with a new allocated page. So it 
will break the 1:1 Workaround.
The commit eee34edcd1daecb70560dfe23009af2e65f7d26d on my tree in 
xenbits (git://xenbits.xen.org/people/julieng/xen-unstable.git) aims to 
fix this issue.
I will try to remember to update the wiki page monday when I will come 
back to the office.
Stefano: A couple of weeks ago, you told me you plan to rework this 
commit for the swiotlb, is it still relevant?
--
Julien Grall

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