cxl/test: Add Secure Erase opcode support

Add support to emulate the CXL the "Secure Erase" operation.

Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Link: https://lore.kernel.org/r/20230612181038.14421-8-dave@stgolabs.net
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

tools/testing/cxl/test/mem.c

@@ -557,6 +557,30 @@ static int mock_sanitize(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
 	return 0; /* assume less than 2 secs, no bg */
 }
 
+static int mock_secure_erase(struct cxl_dev_state *cxlds,
+			     struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+
+	if (cmd->size_in != 0)
+		return -EINVAL;
+
+	if (cmd->size_out != 0)
+		return -EINVAL;
+
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_LOCKED) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	return 0;
+}
+
 static int mock_get_security_state(struct cxl_dev_state *cxlds,
 				   struct cxl_mbox_cmd *cmd)
 {
@@ -1178,6 +1202,9 @@ static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *
 	case CXL_MBOX_OP_SANITIZE:
 		rc = mock_sanitize(cxlds, cmd);
 		break;
+	case CXL_MBOX_OP_SECURE_ERASE:
+		rc = mock_secure_erase(cxlds, cmd);
+		break;
 	case CXL_MBOX_OP_GET_SECURITY_STATE:
 		rc = mock_get_security_state(cxlds, cmd);
 		break;