On 26/04/2010 03:32, "Tej" <bewith.tej@xxxxxxxxx> wrote:
> Now passing the list_head from kernel using hypercall. Now how do I
> copy the element between kernel and hypervisor.
>
> 1. copy_from_guest(hyp_list_head, arg, 1) or
> copy_from_guest(hyp_list_head, arg, <num_of_elements_list>)
> 2. copy_to_guest(arg, hyp_list_head, 1) or copy_to_guest(arg,
> hyp_list_head, <num of element in list>)
The first of these. Copy_{to,from}_guest can copy arrays of structures, but
since this is a linked structure you'd have to do the copy one element at a
time.
> 2nd question:
> I did first one, but first element of list was not accessible in
> hypervisor space, why?
Well, if you are really only copying the list_head, the above should work.
-- Keir
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