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

[Wei Liu <wei.liu2@xxxxxxxxxx>]

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.

Wei.

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