diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c
index 8a3b7d7505fe..813fd1eeba3d 100644
--- a/drivers/cxl/core/memdev.c
+++ b/drivers/cxl/core/memdev.c
@@ -216,6 +216,49 @@ out:
 }
 EXPORT_SYMBOL_NS_GPL(cxl_inject_poison, CXL);
 
+int cxl_clear_poison(struct cxl_memdev *cxlmd, u64 dpa)
+{
+	struct cxl_dev_state *cxlds = cxlmd->cxlds;
+	struct cxl_mbox_clear_poison clear;
+	struct cxl_mbox_cmd mbox_cmd;
+	int rc;
+
+	if (!IS_ENABLED(CONFIG_DEBUG_FS))
+		return 0;
+
+	rc = down_read_interruptible(&cxl_dpa_rwsem);
+	if (rc)
+		return rc;
+
+	rc = cxl_validate_poison_dpa(cxlmd, dpa);
+	if (rc)
+		goto out;
+
+	/*
+	 * In CXL 3.0 Spec 8.2.9.8.4.3, the Clear Poison mailbox command
+	 * is defined to accept 64 bytes of write-data, along with the
+	 * address to clear. This driver uses zeroes as write-data.
+	 */
+	clear = (struct cxl_mbox_clear_poison) {
+		.address = cpu_to_le64(dpa)
+	};
+
+	mbox_cmd = (struct cxl_mbox_cmd) {
+		.opcode = CXL_MBOX_OP_CLEAR_POISON,
+		.size_in = sizeof(clear),
+		.payload_in = &clear,
+	};
+
+	rc = cxl_internal_send_cmd(cxlds, &mbox_cmd);
+	if (rc)
+		goto out;
+out:
+	up_read(&cxl_dpa_rwsem);
+
+	return rc;
+}
+EXPORT_SYMBOL_NS_GPL(cxl_clear_poison, CXL);
+
 static struct attribute *cxl_memdev_attributes[] = {
 	&dev_attr_serial.attr,
 	&dev_attr_firmware_version.attr,
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 2a0625e1d3aa..80276f37b78f 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -620,6 +620,12 @@ struct cxl_mbox_inject_poison {
 	__le64 address;
 };
 
+/* Clear Poison  CXL 3.0 Spec 8.2.9.8.4.3 */
+struct cxl_mbox_clear_poison {
+	__le64 address;
+	u8 write_data[CXL_POISON_LEN_MULT];
+} __packed;
+
 /**
  * struct cxl_mem_command - Driver representation of a memory device command
  * @info: Command information as it exists for the UAPI
@@ -695,6 +701,7 @@ int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
 		       struct cxl_region *cxlr);
 int cxl_trigger_poison_list(struct cxl_memdev *cxlmd);
 int cxl_inject_poison(struct cxl_memdev *cxlmd, u64 dpa);
+int cxl_clear_poison(struct cxl_memdev *cxlmd, u64 dpa);
 
 #ifdef CONFIG_CXL_SUSPEND
 void cxl_mem_active_inc(void);