xenmem_alloc_pa
paddr_t xenmem_alloc_pa(u_long, u_long, bool);
base_paddr = xenmem_alloc_pa(nentries * PAGE_SIZE, PAGE_SIZE, false);
base_paddr = xenmem_alloc_pa(pmb->num * PAGE_SIZE, PAGE_SIZE, true);
base_paddr = xenmem_alloc_pa(pmr->num * PAGE_SIZE, PAGE_SIZE, true);
obj->u.gr.base_paddr = xenmem_alloc_pa(obj->npages * PAGE_SIZE,
base_paddr = xenmem_alloc_pa(PAGE_SIZE, PAGE_SIZE, true);