Re: [Xen-devel] [PATCH 3/7] RFC arm/domain: Reject invalid combinations of domain creation flags

[Julien Grall <julien.grall@xxxxxxx>]

Hi,

On 12/03/18 16:32, Wei Liu wrote:
> On Sun, Mar 11, 2018 at 07:59:16PM +0000, Julien Grall wrote:
> > Hi Andrew,
> >
> > On 03/09/2018 01:18 PM, Andrew Cooper wrote:
> > > ARM guests are HVM and have hardware assisted paging.  There are no PV guests
> > > or shadow paging, and all other creation flags are x86 specific.
> > >
> > > Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> > > ---
> > > CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> > > CC: Julien Grall <julien.grall@xxxxxxx>
> > > CC: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
> > > CC: Wei Liu <wei.liu2@xxxxxxxxxx>
> > >
> > > RFC.  This is untested, but I noticed it when putting together the preceeding
> > > patch.  There is a moderate chance that this will cause things to explode
> > > because of how libxl handles ARM guest construction, but something along these
> > > lines is the right thing to do.
> > Tools and hypervisor are considering ARM guests as PV. So this patch is
> > going to break boot. There are an action (XEN-102) to move ARM guests to
> > behave more like PVH from the tools POV. I am not sure when I will have time
> > to look at it thought.
> >
> > For the time being, I am wondering if we could override the flags for Arm in
> > the toolstack?
> Is that necessary? I don't think the rest of this series will break ARM
> at first glance.
AFAICT, the rest of the series will not break ARM. So I think it would 
be fine to just drop this patch for the time being.
Cheers,

--
Julien Grall

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