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[Xen-devel] Question on xc_gnttab_map_grant_ref()
- To: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
- From: NAHieu <nahieu@xxxxxxxxx>
- Date: Thu, 3 Nov 2005 21:53:21 +0900
- Delivery-date: Thu, 03 Nov 2005 12:50:24 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
Hi,
I am writing a kermel module in DomU, and this module grants a page of
memory to Dom0. Then in Dom0 I try to grant_map it with
xc_gnttab_map_grant_ref()
But this function requires a flag, and I don't know which option to
give it. I tried with either GNTMAP_application_map or
GTF_reading|GTF_writing, but I always got this error:
ERROR: do_gnttab_op: HYPERVISOR_grant_table_op failed: -1
Anybody please tell me how to use xc_gnttab_map_grant_ref() properly
in Dom0's userspace?
Many thanks.
Hieu
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