194  * if the host has accepted the version sent by the guest.
196  * is_accepted: If TRUE, host has accepted the version and the guest
223  * guest. This message notifies if the host has accepted the guest's
224  * capabilities. If the host has not accepted, the guest must shutdown
227  * is_accepted: Indicates if the host has accepted guest's capabilities.
358  * the guest has hit an upper physical memory barrier.
421  * that the host has asked us to hot add. The range
525 	 * This state tracks if the host has specified a hot-add
572 static inline bool has_pfn_is_backed(struct hv_hotadd_state *has,  in has_pfn_is_backed()  argument
578 	if ((pfn < has->covered_start_pfn) || (pfn >= has->covered_end_pfn))  in has_pfn_is_backed()
582 	list_for_each_entry(gap, &has->gap_list, list) {  in has_pfn_is_backed()
594 	struct hv_hotadd_state *has;  in hv_page_offline_check()  local
599 		 * Search for HAS which covers the pfn and when we find one  in hv_page_offline_check()
603 		list_for_each_entry(has, &dm_device.ha_region_list, list) {  in hv_page_offline_check()
604 			while ((pfn >= has->start_pfn) &&  in hv_page_offline_check()
605 			       (pfn < has->end_pfn) &&  in hv_page_offline_check()
608 				if (has_pfn_is_backed(has, pfn))  in hv_page_offline_check()
615 		 * This PFN is not in any HAS (e.g. we're offlining a region  in hv_page_offline_check()
672 static void hv_page_online_one(struct hv_hotadd_state *has, struct page *pg)  in hv_page_online_one()  argument
674 	if (!has_pfn_is_backed(has, page_to_pfn(pg))) {  in hv_page_online_one()
691 static void hv_bring_pgs_online(struct hv_hotadd_state *has,  in hv_bring_pgs_online()  argument
698 		hv_page_online_one(has, pfn_to_page(start_pfn + i));  in hv_bring_pgs_online()
703 				struct hv_hotadd_state *has)  in hv_mem_hot_add()  argument
716 		has->ha_end_pfn +=  HA_CHUNK;  in hv_mem_hot_add()
726 		has->covered_end_pfn +=  processed_pfn;  in hv_mem_hot_add()
749 			has->ha_end_pfn -= HA_CHUNK;  in hv_mem_hot_add()
750 			has->covered_end_pfn -=  processed_pfn;  in hv_mem_hot_add()
758 		 * add has succeeded, it is ok to proceed even if the pages in  in hv_mem_hot_add()
771 	struct hv_hotadd_state *has;  in hv_online_page()  local
776 	list_for_each_entry(has, &dm_device.ha_region_list, list) {  in hv_online_page()
777 		/* The page belongs to a different HAS. */  in hv_online_page()
778 		if ((pfn < has->start_pfn) ||  in hv_online_page()
779 				(pfn + (1UL << order) > has->end_pfn))  in hv_online_page()
782 		hv_bring_pgs_online(has, pfn, 1UL << order);  in hv_online_page()
790 	struct hv_hotadd_state *has;  in pfn_covered()  local
797 	list_for_each_entry(has, &dm_device.ha_region_list, list) {  in pfn_covered()
802 		if (start_pfn < has->start_pfn || start_pfn >= has->end_pfn)  in pfn_covered()
809 		if (has->covered_end_pfn != start_pfn) {  in pfn_covered()
817 			gap->start_pfn = has->covered_end_pfn;  in pfn_covered()
819 			list_add_tail(&gap->list, &has->gap_list);  in pfn_covered()
821 			has->covered_end_pfn = start_pfn;  in pfn_covered()
828 		if ((start_pfn + pfn_cnt) > has->end_pfn) {  in pfn_covered()
829 			residual = (start_pfn + pfn_cnt - has->end_pfn);  in pfn_covered()
837 			has->end_pfn += new_inc;  in pfn_covered()
854 	struct hv_hotadd_state *has;  in handle_pg_range()  local
863 	list_for_each_entry(has, &dm_device.ha_region_list, list) {  in handle_pg_range()
868 		if (start_pfn < has->start_pfn || start_pfn >= has->end_pfn)  in handle_pg_range()
871 		old_covered_state = has->covered_end_pfn;  in handle_pg_range()
873 		if (start_pfn < has->ha_end_pfn) {  in handle_pg_range()
879 			pgs_ol = has->ha_end_pfn - start_pfn;  in handle_pg_range()
883 			has->covered_end_pfn +=  pgs_ol;  in handle_pg_range()
893 			if (start_pfn > has->start_pfn &&  in handle_pg_range()
895 				hv_bring_pgs_online(has, start_pfn, pgs_ol);  in handle_pg_range()
899 		if ((has->ha_end_pfn < has->end_pfn) && (pfn_cnt > 0)) {  in handle_pg_range()
907 			size = (has->end_pfn - has->ha_end_pfn);  in handle_pg_range()
916 			hv_mem_hot_add(has->ha_end_pfn, size, pfn_cnt, has);  in handle_pg_range()
923 		res = has->covered_end_pfn - old_covered_state;  in handle_pg_range()
953 	 * If the host has specified a hot-add range; deal with it first.  in process_hot_add()
1010 		 * The host has not specified the hot-add region.  in hot_add_req()
1034 	 * The result field of the response structure has the  in hot_add_req()
1176 	 * If the last post time that we sampled has changed,  in post_status()
1725 	struct hv_hotadd_state *has, *tmp;  in balloon_remove()  local
1742 	list_for_each_entry_safe(has, tmp, &dm->ha_region_list, list) {  in balloon_remove()
1743 		list_for_each_entry_safe(gap, tmp_gap, &has->gap_list, list) {  in balloon_remove()
1747 		list_del(&has->list);  in balloon_remove()
1748 		kfree(has);  in balloon_remove()