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

[Julien Grall <julien.grall@xxxxxxx>]

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?
Cheers,

--
Julien Grall

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