diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c
index eb436268b92c..fb649683dd3a 100644
--- a/drivers/cxl/acpi.c
+++ b/drivers/cxl/acpi.c
@@ -140,6 +140,12 @@ static int cxl_parse_cfmws(union acpi_subtable_headers *header, void *arg,
 		.end = res->end,
 	};
 	cxld->interleave_ways = ways;
+	/*
+	 * Minimize the x1 granularity to advertise support for any
+	 * valid region granularity
+	 */
+	if (ways == 1)
+		ig = CXL_DECODER_MIN_GRANULARITY;
 	cxld->interleave_granularity = ig;
 
 	rc = cxl_decoder_add(cxld, target_map);
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index 969953ce2609..bc604b7e44fb 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -248,6 +248,8 @@ enum cxl_decoder_type {
  */
 #define CXL_DECODER_MAX_INTERLEAVE 16
 
+#define CXL_DECODER_MIN_GRANULARITY 256
+
 /**
  * struct cxl_decoder - Common CXL HDM Decoder Attributes
  * @dev: this decoder's device