50  * * Big Block Mode (BBM): A Big Block (BB) spans 1..X Linux memory blocks.
86  * State of a Big Block (BB) in BBM, covering 1..X Linux memory blocks.
154 	/* If set, the driver is in SBM, otherwise in BBM. */
219 		} bbm;  member
224 	 * sbm.sb_states, bbm.bb_count, and bbm.bb_states
339 	return addr / vm->bbm.bb_size;  in virtio_mem_phys_to_bb_id()
348 	return bb_id * vm->bbm.bb_size;  in virtio_mem_bb_id_to_phys()
370 	const unsigned long idx = bb_id - vm->bbm.first_bb_id;  in virtio_mem_bbm_set_bb_state()
373 	old_state = vm->bbm.bb_states[idx];  in virtio_mem_bbm_set_bb_state()
374 	vm->bbm.bb_states[idx] = state;  in virtio_mem_bbm_set_bb_state()
376 	BUG_ON(vm->bbm.bb_count[old_state] == 0);  in virtio_mem_bbm_set_bb_state()
377 	vm->bbm.bb_count[old_state]--;  in virtio_mem_bbm_set_bb_state()
378 	vm->bbm.bb_count[state]++;  in virtio_mem_bbm_set_bb_state()
387 	return vm->bbm.bb_states[bb_id - vm->bbm.first_bb_id];  in virtio_mem_bbm_get_bb_state()
395 	unsigned long old_bytes = vm->bbm.next_bb_id - vm->bbm.first_bb_id;  in virtio_mem_bbm_bb_states_prepare_next_bb()
401 	if (vm->bbm.bb_states && old_pages == new_pages)  in virtio_mem_bbm_bb_states_prepare_next_bb()
409 	if (vm->bbm.bb_states)  in virtio_mem_bbm_bb_states_prepare_next_bb()
410 		memcpy(new_array, vm->bbm.bb_states, old_pages * PAGE_SIZE);  in virtio_mem_bbm_bb_states_prepare_next_bb()
411 	vfree(vm->bbm.bb_states);  in virtio_mem_bbm_bb_states_prepare_next_bb()
412 	vm->bbm.bb_states = new_array;  in virtio_mem_bbm_bb_states_prepare_next_bb()
419 	for (_bb_id = vm->bbm.first_bb_id; \
420 	     _bb_id < vm->bbm.next_bb_id && _vm->bbm.bb_count[_state]; \
425 	for (_bb_id = vm->bbm.next_bb_id - 1; \
426 	     _bb_id >= vm->bbm.first_bb_id && _vm->bbm.bb_count[_state]; \
679 	const uint64_t size = vm->bbm.bb_size;  in virtio_mem_bbm_add_bb()
811 	const uint64_t size = vm->bbm.bb_size;  in virtio_mem_bbm_offline_and_remove_bb()
1010 		 * In BBM, we only care about onlining/offlining happening  in virtio_mem_memory_notifier_cb()
1538 	const uint64_t size = vm->bbm.bb_size;  in virtio_mem_bbm_unplug_bb()
1551 	const uint64_t size = vm->bbm.bb_size;  in virtio_mem_bbm_plug_bb()
1839 	if (vm->bbm.next_bb_id > vm->bbm.last_usable_bb_id)  in virtio_mem_bbm_prepare_next_bb()
1847 	vm->bbm.bb_count[VIRTIO_MEM_BBM_BB_UNUSED]++;  in virtio_mem_bbm_prepare_next_bb()
1848 	*bb_id = vm->bbm.next_bb_id;  in virtio_mem_bbm_prepare_next_bb()
1849 	vm->bbm.next_bb_id++;  in virtio_mem_bbm_prepare_next_bb()
1855 	uint64_t nb_bb = diff / vm->bbm.bb_size;  in virtio_mem_bbm_plug_request()
1864 		if (!virtio_mem_could_add_memory(vm, vm->bbm.bb_size))  in virtio_mem_bbm_plug_request()
1877 		if (!virtio_mem_could_add_memory(vm, vm->bbm.bb_size))  in virtio_mem_bbm_plug_request()
2137 	const unsigned long nr_pages = PFN_DOWN(vm->bbm.bb_size);  in virtio_mem_bbm_offline_remove_and_unplug_bb()
2203 	const unsigned long nr_pages = PFN_DOWN(vm->bbm.bb_size);  in virtio_mem_bbm_bb_is_offline()
2222 	const unsigned long nr_pages = PFN_DOWN(vm->bbm.bb_size);  in virtio_mem_bbm_bb_is_movable()
2240 	uint64_t nb_bb = diff / vm->bbm.bb_size;  in virtio_mem_bbm_unplug_request()
2367 		vm->bbm.last_usable_bb_id = virtio_mem_phys_to_bb_id(vm,  in virtio_mem_refresh_config()
2369 		if (!IS_ALIGNED(end_addr + 1, vm->bbm.bb_size))  in virtio_mem_refresh_config()
2370 			vm->bbm.last_usable_bb_id--;  in virtio_mem_refresh_config()
2552 		/* BBM: At least one Linux memory block. */  in virtio_mem_init_hotplug()
2553 		vm->bbm.bb_size = max_t(uint64_t, vm->device_block_size,  in virtio_mem_init_hotplug()
2560 			} else if (bbm_block_size < vm->bbm.bb_size) {  in virtio_mem_init_hotplug()
2564 				vm->bbm.bb_size = bbm_block_size;  in virtio_mem_init_hotplug()
2570 		       vm->bbm.bb_size - 1;  in virtio_mem_init_hotplug()
2571 		vm->bbm.first_bb_id = virtio_mem_phys_to_bb_id(vm, addr);  in virtio_mem_init_hotplug()
2572 		vm->bbm.next_bb_id = vm->bbm.first_bb_id;  in virtio_mem_init_hotplug()
2575 		vm->offline_threshold = max_t(uint64_t, 2 * vm->bbm.bb_size,  in virtio_mem_init_hotplug()
2586 			 (unsigned long long)vm->bbm.bb_size);  in virtio_mem_init_hotplug()
2597 		unit_pages = PHYS_PFN(vm->bbm.bb_size);  in virtio_mem_init_hotplug()
2921 		vfree(vm->bbm.bb_states);  in virtio_mem_deinit_hotplug()