Re: [Xen-devel] [PATCH Remus v2 04/10] tools/libxc: introduce DECLARE_HYPERCALL_BUFFER_USER_POINTER

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Fri, 2015-05-08 at 17:33 +0800, Yang Hongyang wrote:
> Define a user pointer that can access the hypercall buffer data
> Useful when you only need to access the hypercall buffer data

Can you expand on this please, I think the context is a hypercall buffer
passed as an argument or as a member of a struct. Please describe why
DECLARE_HYPERCALL_BUFFER_ARGUMENT and/or DECLARE_HYPERCALL_BUFFER_SHADOW
are not usable here.

Ian.



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