Xen devel - Jun 2006 - grant table issue

Hi,

I am trying to export a memory page of dom0 to a domU in readonly mode. 
In dom0, I grant access permission to that domU. In domU, I did
 HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map, res->nr_pages);

All these functions returned successfully. But when I tried to access 
data in the mapped memory page, all data I got is 0. 

Is there any restriction that preventing dom0 pages from being export to 
other domains? If so, is there any way to relax this restriction?

xin

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On 9 Jun 2006, at 09:47, Xin Zhao wrote:
> I am trying to export a memory page of dom0 to a domU in readonly 
> mode. In dom0, I grant access permission to that domU. In domU, I did
> HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map, res->nr_pages);
>
> All these functions returned successfully. But when I tried to access 
> data in the mapped memory page, all data I got is 0.
> Is there any restriction that preventing dom0 pages from being export 
> to other domains? If so, is there any way to relax this restriction?
No, there are no such restrictions.

  -- Keir


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