Xen devel - Dec 2007 - XEN_GUEST_HANDLEs - help

Hi. I am playing with some code and not sure how to do what I want to do.

In the physinfo struct:
XEN_GUEST_HANDLE_64(uint32_t) cpu_to_node;

So if I am in tools/libxc/xc_misc.c

and want to do (effectively)
xc_physinfo_t *put_info
....
put_info->cpu_to_node[0] = NUMA_NO_NODE;

how can I access the contents of the XEN_GUEST_HANDLE from the tools 
side? Can anyone explain how these XEN_GUEST_HANDLEs work? I am not 
quite getting what I see in the code

-- 
Elizabeth Kon (Beth)
IBM Linux Technology Center
Open Hypervisor Team
email: eak@us.ibm.com


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uint32_t *cpu_to_node = get_xen_guest_handle(put_info->cpu_to_node);
    cpu_to_node[0] = NUMA_NON_NODE;

 -- Keir

On 19/12/07 12:26, "beth kon" <eak@us.ibm.com> wrote:
> Hi. I am playing with some code and not sure how to do what I want to do.
> 
> In the physinfo struct:
> XEN_GUEST_HANDLE_64(uint32_t) cpu_to_node;
> 
> So if I am in tools/libxc/xc_misc.c
> 
> and want to do (effectively)
> xc_physinfo_t *put_info
> ....
> put_info->cpu_to_node[0] = NUMA_NO_NODE;
> 
> how can I access the contents of the XEN_GUEST_HANDLE from the tools
> side? Can anyone explain how these XEN_GUEST_HANDLEs work? I am not
> quite getting what I see in the code


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