diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 427323620ce8..00c58a6632a6 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -82,6 +82,11 @@ static struct bus_type memory_subsys = {
  */
 static DEFINE_XARRAY(memory_blocks);
 
+/*
+ * Memory groups, indexed by memory group identification (mgid).
+ */
+static DEFINE_XARRAY_FLAGS(memory_groups, XA_FLAGS_ALLOC);
+
 static BLOCKING_NOTIFIER_HEAD(memory_chain);
 
 int register_memory_notifier(struct notifier_block *nb)
@@ -634,7 +639,8 @@ int register_memory(struct memory_block *memory)
 }
 
 static int init_memory_block(unsigned long block_id, unsigned long state,
-			     unsigned long nr_vmemmap_pages)
+			     unsigned long nr_vmemmap_pages,
+			     struct memory_group *group)
 {
 	struct memory_block *mem;
 	int ret = 0;
@@ -653,6 +659,11 @@ static int init_memory_block(unsigned long block_id, unsigned long state,
 	mem->nid = NUMA_NO_NODE;
 	mem->nr_vmemmap_pages = nr_vmemmap_pages;
 
+	if (group) {
+		mem->group = group;
+		refcount_inc(&group->refcount);
+	}
+
 	ret = register_memory(mem);
 
 	return ret;
@@ -671,7 +682,7 @@ static int add_memory_block(unsigned long base_section_nr)
 	if (section_count == 0)
 		return 0;
 	return init_memory_block(memory_block_id(base_section_nr),
-				 MEM_ONLINE, 0);
+				 MEM_ONLINE, 0,  NULL);
 }
 
 static void unregister_memory(struct memory_block *memory)
@@ -681,6 +692,11 @@ static void unregister_memory(struct memory_block *memory)
 
 	WARN_ON(xa_erase(&memory_blocks, memory->dev.id) == NULL);
 
+	if (memory->group) {
+		refcount_dec(&memory->group->refcount);
+		memory->group = NULL;
+	}
+
 	/* drop the ref. we got via find_memory_block() */
 	put_device(&memory->dev);
 	device_unregister(&memory->dev);
@@ -694,7 +710,8 @@ static void unregister_memory(struct memory_block *memory)
  * Called under device_hotplug_lock.
  */
 int create_memory_block_devices(unsigned long start, unsigned long size,
-				unsigned long vmemmap_pages)
+				unsigned long vmemmap_pages,
+				struct memory_group *group)
 {
 	const unsigned long start_block_id = pfn_to_block_id(PFN_DOWN(start));
 	unsigned long end_block_id = pfn_to_block_id(PFN_DOWN(start + size));
@@ -707,7 +724,8 @@ int create_memory_block_devices(unsigned long start, unsigned long size,
 		return -EINVAL;
 
 	for (block_id = start_block_id; block_id != end_block_id; block_id++) {
-		ret = init_memory_block(block_id, MEM_OFFLINE, vmemmap_pages);
+		ret = init_memory_block(block_id, MEM_OFFLINE, vmemmap_pages,
+					group);
 		if (ret)
 			break;
 	}
@@ -891,3 +909,79 @@ int for_each_memory_block(void *arg, walk_memory_blocks_func_t func)
 	return bus_for_each_dev(&memory_subsys, NULL, &cb_data,
 				for_each_memory_block_cb);
 }
+
+static int register_memory_group(struct memory_group group)
+{
+	struct memory_group *new_group;
+	uint32_t mgid;
+	int ret;
+
+	if (!node_possible(group.nid))
+		return -EINVAL;
+
+	new_group = kzalloc(sizeof(group), GFP_KERNEL);
+	if (!new_group)
+		return -ENOMEM;
+	*new_group = group;
+	refcount_set(&new_group->refcount, 1);
+
+	ret = xa_alloc(&memory_groups, &mgid, new_group, xa_limit_31b,
+		       GFP_KERNEL);
+	if (ret)
+		kfree(new_group);
+	return ret ? ret : mgid;
+}
+
+int register_static_memory_group(int nid, unsigned long max_pages)
+{
+	struct memory_group group = {
+		.nid = nid,
+		.s = {
+			.max_pages = max_pages,
+		},
+	};
+
+	if (!max_pages)
+		return -EINVAL;
+	return register_memory_group(group);
+}
+EXPORT_SYMBOL_GPL(register_static_memory_group);
+
+int register_dynamic_memory_group(int nid, unsigned long unit_pages)
+{
+	struct memory_group group = {
+		.nid = nid,
+		.is_dynamic = true,
+		.d = {
+			.unit_pages = unit_pages,
+		},
+	};
+
+	if (!unit_pages || !is_power_of_2(unit_pages) ||
+	    unit_pages < PHYS_PFN(memory_block_size_bytes()))
+		return -EINVAL;
+	return register_memory_group(group);
+}
+EXPORT_SYMBOL_GPL(register_dynamic_memory_group);
+
+int unregister_memory_group(int mgid)
+{
+	struct memory_group *group;
+
+	if (mgid < 0)
+		return -EINVAL;
+
+	group = xa_load(&memory_groups, mgid);
+	if (!group || refcount_read(&group->refcount) > 1)
+		return -EINVAL;
+
+	xa_erase(&memory_groups, mgid);
+	kfree(group);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(unregister_memory_group);
+
+struct memory_group *get_memory_group(int mgid)
+{
+	return xa_load(&memory_groups, mgid);
+}
diff --git a/include/linux/memory.h b/include/linux/memory.h
index 97e92e8b556a..6e20a6174fe5 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -23,6 +23,42 @@
 
 #define MIN_MEMORY_BLOCK_SIZE     (1UL << SECTION_SIZE_BITS)
 
+struct memory_group {
+	/* Nid the whole group belongs to. */
+	int nid;
+	/* References from memory blocks + 1. */
+	refcount_t refcount;
+	/*
+	 * Memory group type: static vs. dynamic.
+	 *
+	 * Static: All memory in the group belongs to a single unit, such as,
+	 * a DIMM. All memory belonging to the group will be added in
+	 * one go and removed in one go -- it's static.
+	 *
+	 * Dynamic: Memory within the group is added/removed dynamically in
+	 * units of the specified granularity of at least one memory block.
+	 */
+	bool is_dynamic;
+
+	union {
+		struct {
+			/*
+			 * Maximum number of pages we'll have in this static
+			 * memory group.
+			 */
+			unsigned long max_pages;
+		} s;
+		struct {
+			/*
+			 * Unit in pages in which memory is added/removed in
+			 * this dynamic memory group. This granularity defines
+			 * the alignment of a unit in physical address space.
+			 */
+			unsigned long unit_pages;
+		} d;
+	};
+};
+
 struct memory_block {
 	unsigned long start_section_nr;
 	unsigned long state;		/* serialized by the dev->lock */
@@ -34,6 +70,7 @@ struct memory_block {
 	 * lay at the beginning of the memory block.
 	 */
 	unsigned long nr_vmemmap_pages;
+	struct memory_group *group;	/* group (if any) for this block */
 };
 
 int arch_get_memory_phys_device(unsigned long start_pfn);
@@ -86,7 +123,8 @@ static inline int memory_notify(unsigned long val, void *v)
 extern int register_memory_notifier(struct notifier_block *nb);
 extern void unregister_memory_notifier(struct notifier_block *nb);
 int create_memory_block_devices(unsigned long start, unsigned long size,
-				unsigned long vmemmap_pages);
+				unsigned long vmemmap_pages,
+				struct memory_group *group);
 void remove_memory_block_devices(unsigned long start, unsigned long size);
 extern void memory_dev_init(void);
 extern int memory_notify(unsigned long val, void *v);
@@ -95,6 +133,12 @@ typedef int (*walk_memory_blocks_func_t)(struct memory_block *, void *);
 extern int walk_memory_blocks(unsigned long start, unsigned long size,
 			      void *arg, walk_memory_blocks_func_t func);
 extern int for_each_memory_block(void *arg, walk_memory_blocks_func_t func);
+
+extern int register_static_memory_group(int nid, unsigned long max_pages);
+extern int register_dynamic_memory_group(int nid, unsigned long unit_pages);
+extern int unregister_memory_group(int mgid);
+struct memory_group *get_memory_group(int mgid);
+
 #define CONFIG_MEM_BLOCK_SIZE	(PAGES_PER_SECTION<<PAGE_SHIFT)
 #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */
 
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 84f05435e2ae..5c910dc2526a 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -54,7 +54,6 @@ typedef int __bitwise mhp_t;
  * might be stale, or the resource might have changed.
  */
 #define MHP_MERGE_RESOURCE	((__force mhp_t)BIT(0))
-
 /*
  * We want memmap (struct page array) to be self contained.
  * To do so, we will use the beginning of the hot-added range to build
@@ -62,6 +61,11 @@ typedef int __bitwise mhp_t;
  * Only selected architectures support it with SPARSE_VMEMMAP.
  */
 #define MHP_MEMMAP_ON_MEMORY   ((__force mhp_t)BIT(1))
+/*
+ * The nid field specifies a memory group identifier (mgid) instead. The memory
+ * group implies the nid.
+ */
+#define MHP_NID_IS_MGID		((__force mhp_t)BIT(2))
 
 /*
  * Extended parameters for memory hotplug:
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 9cae42636f3e..4e039c82e7b6 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1384,6 +1384,7 @@ int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
 {
 	struct mhp_params params = { .pgprot = pgprot_mhp(PAGE_KERNEL) };
 	struct vmem_altmap mhp_altmap = {};
+	struct memory_group *group = NULL;
 	u64 start, size;
 	bool new_node = false;
 	int ret;
@@ -1395,6 +1396,13 @@ int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
 	if (ret)
 		return ret;
 
+	if (mhp_flags & MHP_NID_IS_MGID) {
+		group = get_memory_group(nid);
+		if (!group)
+			return -EINVAL;
+		nid = group->nid;
+	}
+
 	if (!node_possible(nid)) {
 		WARN(1, "node %d was absent from the node_possible_map\n", nid);
 		return -EINVAL;
@@ -1429,7 +1437,8 @@ int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
 		goto error;
 
 	/* create memory block devices after memory was added */
-	ret = create_memory_block_devices(start, size, mhp_altmap.alloc);
+	ret = create_memory_block_devices(start, size, mhp_altmap.alloc,
+					  group);
 	if (ret) {
 		arch_remove_memory(start, size, NULL);
 		goto error;
