Jan Beulich writes ("Re: [PATCH 4/4] xen/public: arm: rework the macro
set_xen_guest_handle_raw"):
> On 04.11.15 at 17:50, <ian.jack...@eu.citrix.com> wrote:
> > If we don't provide a get_xen_guest_handle, a kernel developer will be
> > sorely tempted to make one.
>
> What use would it be to them? Kernels only write handles, they
> shouldn't have a need for reading them.
I foresee situations where a kernel might like to update a proposed
hypercall argument structure in place, which might involve reading the
handles.
Ian.
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