Function xc_domain_populate_physmap 

pub unsafe extern "C" fn xc_domain_populate_physmap(
    xch: *mut xc_interface,
    domid: u32,
    nr_extents: c_ulong,
    extent_order: c_uint,
    mem_flags: c_uint,
    extent_start: *mut xen_pfn_t,
) -> c_int