diff --git a/drivers/virt/gunyah/gunyah_rm_rpc.c b/drivers/virt/gunyah/gunyah_rm_rpc.c
index fe6ba476c4dc..544ec8022104 100644
--- a/drivers/virt/gunyah/gunyah_rm_rpc.c
+++ b/drivers/virt/gunyah/gunyah_rm_rpc.c
@@ -49,6 +49,8 @@ struct gh_rm_rpc_reply_hdr {
 
 #define GH_RM_MAX_MSG_SIZE	(GH_MSGQ_MAX_MSG_SIZE - sizeof(struct gh_rm_rpc_hdr))
 
+#define GH_RM_MAX_MEM_ENTRIES	512
+
 /**
  * struct gh_rm_connection - Represents a complete message from resource manager
  * @payload: Combined payload of all the fragments (msg headers stripped off).
@@ -588,6 +590,203 @@ static int gh_rm_common_vmid_call(struct gh_rm_rpc *rm, u32 message_id, u16 vmid
 	return ret;
 }
 
+static int _gh_rm_mem_append(struct gh_rm_rpc *rm, u32 mem_handle, bool end_append,
+			struct gh_rm_mem_entry *mem_entries, size_t n_mem_entries)
+{
+	size_t msg_size = 0;
+	void *msg;
+	struct gh_mem_append_req_header *req_header;
+	struct gh_mem_share_req_mem_section *mem_section;
+	void *resp;
+	size_t resp_size;
+	int ret;
+
+	msg_size += sizeof(struct gh_mem_append_req_header);
+	msg_size += offsetof(struct gh_mem_share_req_mem_section, entries[n_mem_entries]);
+
+	msg = kzalloc(msg_size, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	req_header = msg;
+	mem_section = (void *)req_header + sizeof(struct gh_mem_append_req_header);
+
+	req_header->mem_handle = mem_handle;
+	if (end_append)
+		req_header->flags |= GH_MEM_APPEND_REQ_FLAGS_END;
+
+	mem_section->n_entries = n_mem_entries;
+	memcpy(mem_section->entries, mem_entries, sizeof(*mem_entries) * n_mem_entries);
+
+	ret = gh_rm_call(rm, GH_RM_RPC_MEM_APPEND, msg, msg_size, &resp, &resp_size);
+	if (ret)
+		return ret;
+	kfree(resp);
+
+	return ret;
+}
+
+static int gh_rm_mem_append(struct gh_rm_rpc *rm, u32 mem_handle, bool allow_append,
+			struct gh_rm_mem_entry *mem_entries, size_t n_mem_entries)
+{
+	bool end_append;
+	size_t n;
+	int ret = 0;
+
+	while (n_mem_entries) {
+		if (n_mem_entries > GH_RM_MAX_MEM_ENTRIES) {
+			end_append = false;
+			n = GH_RM_MAX_MEM_ENTRIES;
+		} else {
+			end_append = !allow_append;
+			n = n_mem_entries;
+		}
+
+		ret = _gh_rm_mem_append(rm, mem_handle, end_append, mem_entries, n);
+		if (ret)
+			break;
+
+		mem_entries += n;
+		n_mem_entries -= n;
+	}
+
+	return ret;
+}
+
+static int gh_rm_mem_lend_common(struct gh_rm_rpc *rm, u32 message_id, struct gh_rm_mem_parcel *p)
+{
+	size_t msg_size = 0, initial_n_mem_entries = p->n_mem_entries;
+	void *msg, *resp;
+	struct gh_mem_share_req_header *req_header;
+	struct gh_mem_share_req_acl_section *acl_section;
+	struct gh_mem_share_req_mem_section *mem_section;
+	u32 *mem_attr_section;
+	size_t resp_size;
+	int ret;
+
+	if (!p->acl_entries || !p->n_acl_entries || !p->mem_entries || !p->n_mem_entries ||
+	    p->n_acl_entries > U8_MAX)
+		return -EINVAL;
+
+	if (initial_n_mem_entries > GH_RM_MAX_MEM_ENTRIES)
+		initial_n_mem_entries = GH_RM_MAX_MEM_ENTRIES;
+
+	/* The format of the message goes:
+	 * request header
+	 * ACL entries (which VMs get what kind of access to this memory parcel)
+	 * Memory entries (list of memory regions to share)
+	 * Memory attributes (currently unused, we'll hard-code the size to 0)
+	 */
+	msg_size += sizeof(struct gh_mem_share_req_header);
+	msg_size += offsetof(struct gh_mem_share_req_acl_section, entries[p->n_acl_entries]);
+	msg_size += offsetof(struct gh_mem_share_req_mem_section, entries[initial_n_mem_entries]);
+	msg_size += sizeof(u32); /* for memory attributes, currently unused */
+
+	msg = kzalloc(msg_size, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	req_header = msg;
+	acl_section = (void *)req_header + sizeof(*req_header);
+	mem_section = (void *)acl_section + offsetof(struct gh_mem_share_req_acl_section,
+						entries[p->n_acl_entries]);
+	mem_attr_section = (void *)mem_section + offsetof(struct gh_mem_share_req_mem_section,
+						entries[initial_n_mem_entries]);
+
+	req_header->mem_type = p->mem_type;
+	if (initial_n_mem_entries != p->n_mem_entries)
+		req_header->flags |= GH_MEM_SHARE_REQ_FLAGS_APPEND;
+	req_header->label = p->label;
+
+	acl_section->n_entries = p->n_acl_entries;
+	memcpy(acl_section->entries, p->acl_entries, sizeof(*(p->acl_entries)) * p->n_acl_entries);
+
+	mem_section->n_entries = initial_n_mem_entries;
+	memcpy(mem_section->entries, p->mem_entries,
+		sizeof(*(p->mem_entries)) * initial_n_mem_entries);
+
+	/* Set n_entries for memory attribute section to 0 */
+	*mem_attr_section = 0;
+
+	ret = gh_rm_call(rm, message_id, msg, msg_size, &resp, &resp_size);
+	if (ret)
+		return ret;
+
+	if (resp_size != sizeof(u32)) {
+		ret = -EIO;
+		goto out;
+	}
+
+	p->mem_handle = *(u32 *)resp;
+
+	if (initial_n_mem_entries != p->n_mem_entries) {
+		ret = gh_rm_mem_append(rm, p->mem_handle, false,
+					&p->mem_entries[initial_n_mem_entries],
+					p->n_mem_entries - initial_n_mem_entries);
+		if (ret)
+			gh_rm_mem_reclaim(rm, p);
+	}
+
+out:
+	kfree(resp);
+	return ret;
+}
+
+/**
+ * gh_rm_mem_lend() - Lend memory to other virtual machines.
+ * @parcel: Package the memory information of the memory to be lent.
+ *
+ * Returns - 0 on success; negative value on failure
+ *
+ * Lending removes Linux's access to the memory while the memory parcel is lent.
+ */
+int gh_rm_mem_lend(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *parcel)
+{
+	return gh_rm_mem_lend_common(rm, GH_RM_RPC_MEM_LEND, parcel);
+}
+EXPORT_SYMBOL_GPL(gh_rm_mem_lend);
+
+
+/**
+ * gh_rm_mem_share() - Share memory with other virtual machines.
+ * @parcel: Package the memory information of the memory to be shared.
+ *
+ * Returns - 0 on success; negative value on failure
+ *
+ * Sharing keeps Linux's access to the memory while the memory parcel is shared.
+ */
+int gh_rm_mem_share(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *parcel)
+{
+	return gh_rm_mem_lend_common(rm, GH_RM_RPC_MEM_SHARE, parcel);
+}
+EXPORT_SYMBOL_GPL(gh_rm_mem_share);
+
+/**
+ * gh_rm_mem_reclaim() - Reclaim a memory parcel
+ * @parcel: Package the memory information of the memory to be reclaimed.
+ *
+ * Returns - 0 on success; negative value on failure
+ *
+ * RM maps the associated memory back into the stage-2 page tables of the owner VM.
+ */
+int gh_rm_mem_reclaim(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *parcel)
+{
+	struct gh_mem_release_req req = {
+		.mem_handle = parcel->mem_handle,
+	};
+	size_t resp_size;
+	void *resp;
+	int ret;
+
+	ret = gh_rm_call(rm, GH_RM_RPC_MEM_RECLAIM, &req, sizeof(req), &resp, &resp_size);
+	if (ret)
+		return ret;
+	kfree(resp);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(gh_rm_mem_reclaim);
+
 /**
  * gh_rm_alloc_vmid() - Allocate a new VM in Gunyah. Returns the VM identifier.
  * @vmid: Use GH_VMID_INVAL to dynamically allocate a VM. A reserved VMID can also be requested
diff --git a/drivers/virt/gunyah/rsc_mgr.h b/drivers/virt/gunyah/rsc_mgr.h
index 11a5afa2c79c..4712405a3486 100644
--- a/drivers/virt/gunyah/rsc_mgr.h
+++ b/drivers/virt/gunyah/rsc_mgr.h
@@ -34,6 +34,12 @@ struct platform_device;
 struct gh_rm_rpc *gh_rm_rpc_init(struct platform_device *pdev);
 void gh_rm_rpc_remove(struct gh_rm_rpc *rm);
 
+/* Message IDs: Memory Management */
+#define GH_RM_RPC_MEM_LEND			0x51000012
+#define GH_RM_RPC_MEM_SHARE			0x51000013
+#define GH_RM_RPC_MEM_RECLAIM			0x51000015
+#define GH_RM_RPC_MEM_APPEND			0x51000018
+
 /* Message IDs: VM Management */
 #define GH_RM_RPC_VM_ALLOC_VMID			0x56000001
 #define GH_RM_RPC_VM_DEALLOC_VMID		0x56000002
@@ -51,6 +57,44 @@ struct gh_vm_common_vmid_req {
 	u16 reserved0;
 } __packed;
 
+/* Call: MEM_LEND, MEM_SHARE */
+struct gh_mem_share_req_header {
+	u8 mem_type;
+	u8 reserved0;
+#define GH_MEM_SHARE_REQ_FLAGS_APPEND		BIT(1)
+	u8 flags;
+	u8 reserved1;
+	u32 label;
+} __packed;
+
+struct gh_mem_share_req_acl_section {
+	u32 n_entries;
+	struct gh_rm_mem_acl_entry entries[];
+};
+
+struct gh_mem_share_req_mem_section {
+	u16 n_entries;
+	u16 reserved0;
+	struct gh_rm_mem_entry entries[];
+};
+
+/* Call: MEM_RELEASE */
+struct gh_mem_release_req {
+	u32 mem_handle;
+	u8 flags;
+	u16 reserved0;
+	u8 reserved1;
+} __packed;
+
+/* Call: MEM_APPEND */
+struct gh_mem_append_req_header {
+	u32 mem_handle;
+#define GH_MEM_APPEND_REQ_FLAGS_END	BIT(0)
+	u8 flags;
+	u16 reserved0;
+	u8 reserved1;
+} __packed;
+
 /* Call: VM_STOP */
 struct gh_vm_stop_req {
 	u16 vmid;
diff --git a/include/linux/gunyah_rsc_mgr.h b/include/linux/gunyah_rsc_mgr.h
index a0bd6f39c649..c0f5c04c64dc 100644
--- a/include/linux/gunyah_rsc_mgr.h
+++ b/include/linux/gunyah_rsc_mgr.h
@@ -11,6 +11,7 @@
 #include <linux/gunyah.h>
 
 #define GH_VMID_INVAL	U16_MAX
+#define GH_MEM_HANDLE_INVAL	U32_MAX
 
 /* Gunyah recognizes VMID0 as an alias to the current VM's ID */
 #define GH_VMID_SELF			0
@@ -31,7 +32,53 @@ enum gh_rm_vm_status {
 	GH_RM_VM_STATUS_RESET		= 11,
 };
 
+struct gh_rm_mem_acl_entry {
+	u16 vmid;
+#define GH_RM_ACL_X		BIT(0)
+#define GH_RM_ACL_W		BIT(1)
+#define GH_RM_ACL_R		BIT(2)
+	u8 perms;
+	u8 reserved;
+} __packed;
+
+struct gh_rm_mem_entry {
+	u64 ipa_base;
+	u64 size;
+} __packed;
+
+enum gh_rm_mem_type {
+	GH_RM_MEM_TYPE_NORMAL	= 0,
+	GH_RM_MEM_TYPE_IO	= 1,
+};
+
+/*
+ * struct gh_rm_mem_parcel - Package info about memory to be lent/shared/donated/reclaimed
+ * @mem_type: The type of memory: normal (DDR) or IO
+ * @label: An client-specified identifier which can be used by the other VMs to identify the purpose
+ *         of the memory parcel.
+ * @acl_entries: An array of access control entries. Each entry specifies a VM and what access
+ *               is allowed for the memory parcel.
+ * @n_acl_entries: Count of the number of entries in the `acl_entries` array.
+ * @mem_entries: An list of regions to be associated with the memory parcel. Addresses should be
+ *               (intermediate) physical addresses from Linux's perspective.
+ * @n_mem_entries: Count of the number of entries in the `mem_entries` array.
+ * @mem_handle: On success, filled with memory handle that RM allocates for this memory parcel
+ */
+struct gh_rm_mem_parcel {
+	enum gh_rm_mem_type mem_type;
+	u32 label;
+	size_t n_acl_entries;
+	struct gh_rm_mem_acl_entry *acl_entries;
+	size_t n_mem_entries;
+	struct gh_rm_mem_entry *mem_entries;
+	u32 mem_handle;
+};
+
 /* RPC Calls */
+int gh_rm_mem_lend(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *parcel);
+int gh_rm_mem_share(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *parcel);
+int gh_rm_mem_reclaim(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *parcel);
+
 int gh_rm_alloc_vmid(struct gh_rm_rpc *rm, u16 vmid);
 int gh_rm_dealloc_vmid(struct gh_rm_rpc *rm, u16 vmid);
 int gh_rm_vm_start(struct gh_rm_rpc *rm, u16 vmid);
