diff --git a/Documentation/cxl/lib/libcxl.txt b/Documentation/cxl/lib/libcxl.txt
index 4392b47..a6986ab 100644
--- a/Documentation/cxl/lib/libcxl.txt
+++ b/Documentation/cxl/lib/libcxl.txt
@@ -131,6 +131,7 @@ int cxl_memdev_read_label(struct cxl_memdev *memdev, void *buf, size_t length,
 			  size_t offset);
 int cxl_memdev_write_label(struct cxl_memdev *memdev, void *buf, size_t length,
 			   size_t offset);
+struct cxl_cmd *cxl_cmd_new_get_partition(struct cxl_memdev *memdev);
 
 ----
 
diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c
index e0b443f..4557a71 100644
--- a/cxl/lib/libcxl.c
+++ b/cxl/lib/libcxl.c
@@ -1985,6 +1985,11 @@ static int cxl_cmd_validate_status(struct cxl_cmd *cmd, u32 id)
 	return 0;
 }
 
+static uint64_t cxl_capacity_to_bytes(leint64_t size)
+{
+	return le64_to_cpu(size) * CXL_CAPACITY_MULTIPLIER;
+}
+
 /* Helpers for health_info fields (no endian conversion) */
 #define cmd_get_field_u8(cmd, n, N, field)				\
 do {									\
@@ -2371,6 +2376,67 @@ CXL_EXPORT ssize_t cxl_cmd_read_label_get_payload(struct cxl_cmd *cmd,
 	return length;
 }
 
+CXL_EXPORT struct cxl_cmd *cxl_cmd_new_get_partition(struct cxl_memdev *memdev)
+{
+	return cxl_cmd_new_generic(memdev,
+				   CXL_MEM_COMMAND_ID_GET_PARTITION_INFO);
+}
+
+static struct cxl_cmd_get_partition *
+cmd_to_get_partition(struct cxl_cmd *cmd)
+{
+	if (cxl_cmd_validate_status(cmd, CXL_MEM_COMMAND_ID_GET_PARTITION_INFO))
+		return NULL;
+
+	if (!cmd)
+		return NULL;
+	return cmd->output_payload;
+}
+
+CXL_EXPORT unsigned long long
+cxl_cmd_partition_get_active_volatile_size(struct cxl_cmd *cmd)
+{
+	struct cxl_cmd_get_partition *c;
+
+	c = cmd_to_get_partition(cmd);
+	if (!c)
+		return ULLONG_MAX;
+	return cxl_capacity_to_bytes(c->active_volatile);
+}
+
+CXL_EXPORT unsigned long long
+cxl_cmd_partition_get_active_persistent_size(struct cxl_cmd *cmd)
+{
+	struct cxl_cmd_get_partition *c;
+
+	c = cmd_to_get_partition(cmd);
+	if (!c)
+		return ULLONG_MAX;
+	return cxl_capacity_to_bytes(c->active_persistent);
+}
+
+CXL_EXPORT unsigned long long
+cxl_cmd_partition_get_next_volatile_size(struct cxl_cmd *cmd)
+{
+	struct cxl_cmd_get_partition *c;
+
+	c = cmd_to_get_partition(cmd);
+	if (!c)
+		return ULLONG_MAX;
+	return cxl_capacity_to_bytes(c->next_volatile);
+}
+
+CXL_EXPORT unsigned long long
+cxl_cmd_partition_get_next_persistent_size(struct cxl_cmd *cmd)
+{
+	struct cxl_cmd_get_partition *c;
+
+	c = cmd_to_get_partition(cmd);
+	if (!c)
+		return ULLONG_MAX;
+	return cxl_capacity_to_bytes(c->next_persistent);
+}
+
 CXL_EXPORT int cxl_cmd_submit(struct cxl_cmd *cmd)
 {
 	struct cxl_memdev *memdev = cmd->memdev;
diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym
index e56a2bf..509e62d 100644
--- a/cxl/lib/libcxl.sym
+++ b/cxl/lib/libcxl.sym
@@ -155,4 +155,9 @@ global:
 	cxl_dport_get_port;
 	cxl_port_get_dport_by_memdev;
 	cxl_dport_maps_memdev;
+	cxl_cmd_new_get_partition;
+	cxl_cmd_partition_get_active_volatile_size;
+	cxl_cmd_partition_get_active_persistent_size;
+	cxl_cmd_partition_get_next_volatile_size;
+	cxl_cmd_partition_get_next_persistent_size;
 } LIBCXL_1;
diff --git a/cxl/lib/private.h b/cxl/lib/private.h
index f483c30..7f3a562 100644
--- a/cxl/lib/private.h
+++ b/cxl/lib/private.h
@@ -7,6 +7,7 @@
 #include <cxl/cxl_mem.h>
 #include <ccan/endian/endian.h>
 #include <ccan/short_types/short_types.h>
+#include <util/size.h>
 
 #define CXL_EXPORT __attribute__ ((visibility("default")))
 
@@ -185,6 +186,15 @@ struct cxl_cmd_get_health_info {
 	le32 pmem_errors;
 } __attribute__((packed));
 
+struct cxl_cmd_get_partition {
+	le64 active_volatile;
+	le64 active_persistent;
+	le64 next_volatile;
+	le64 next_persistent;
+} __attribute__((packed));
+
+#define CXL_CAPACITY_MULTIPLIER		SZ_256M
+
 /* CXL 2.0 8.2.9.5.3 Byte 0 Health Status */
 #define CXL_CMD_HEALTH_INFO_STATUS_MAINTENANCE_NEEDED_MASK		BIT(0)
 #define CXL_CMD_HEALTH_INFO_STATUS_PERFORMANCE_DEGRADED_MASK		BIT(1)
diff --git a/cxl/libcxl.h b/cxl/libcxl.h
index 3b2293b..2c0a8d1 100644
--- a/cxl/libcxl.h
+++ b/cxl/libcxl.h
@@ -242,6 +242,11 @@ ssize_t cxl_cmd_read_label_get_payload(struct cxl_cmd *cmd, void *buf,
 		unsigned int length);
 struct cxl_cmd *cxl_cmd_new_write_label(struct cxl_memdev *memdev,
 		void *buf, unsigned int offset, unsigned int length);
+struct cxl_cmd *cxl_cmd_new_get_partition(struct cxl_memdev *memdev);
+unsigned long long cxl_cmd_partition_get_active_volatile_size(struct cxl_cmd *cmd);
+unsigned long long cxl_cmd_partition_get_active_persistent_size(struct cxl_cmd *cmd);
+unsigned long long cxl_cmd_partition_get_next_volatile_size(struct cxl_cmd *cmd);
+unsigned long long cxl_cmd_partition_get_next_persistent_size(struct cxl_cmd *cmd);
 
 #ifdef __cplusplus
 } /* extern "C" */
diff --git a/util/size.h b/util/size.h
index a0f3593..e72467f 100644
--- a/util/size.h
+++ b/util/size.h
@@ -15,6 +15,7 @@
 #define SZ_4M     0x00400000
 #define SZ_16M    0x01000000
 #define SZ_64M    0x04000000
+#define SZ_256M	  0x10000000
 #define SZ_1G     0x40000000
 #define SZ_1T 0x10000000000ULL
 
