Re: [Xen-devel] [PATCH 4/5] xen: introduce XEN_GUEST_HANDLE_PARAM

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 08.08.12 at 09:48, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> I don't think that the wastage at the hypercall interface is going to be
> significant. Especially once you consider that many of the 32-bit fields
> actually need to be 64-bit for a compat mode guest any, e.g. MFNs should
> certainly be 64 bit regardless or else you impose limitations on 32-bit
> guests which the 64-bit hypervisor doesn't itself have.

Hmm, MFNs are probably a bad example, because we already have
a separate xen_pfn_t to deal with precisely that case.

Jan


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