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See: V2: https://lists.xen.org/archives/html/xen-devel/2017-06/msg02256.html V1: https://lists.xen.org/archives/html/xen-devel/2017-05/msg01288.html The plan is to use XENMEM_add_to_physmap_batch in xl to map foregin pages from one DomU to another so that the page could be shared. But currently there is no wrapper for XENMEM_add_to_physmap_batch in libxc, so we just add a wrapper for it. Signed-off-by: Zhongze Liu --- Changed Since v1: * explain why such a sudden wrapper * change the parameters' types Cc: Ian Jackson , Cc: Wei Liu , Cc: Stefano Stabellini Cc: Julien Grall Cc: Jan Beulich