diff --git a/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dtsi b/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dtsi
index 135ef35e1db1..a7fdcf16e324 100644
--- a/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dtsi
+++ b/arch/arm/boot/dts/stm32mp157c-ev1-scmi.dtsi
@@ -10,6 +10,15 @@
 			reg = <0xfe000000 0x2000000>;
 			no-map;
 		};
+
+		/* global autoconfigured region for contiguous allocations */
+		linux,cma {
+			compatible = "shared-dma-pool";
+			reusable;
+			size = <0x8000000>;
+			alignment = <0x2000>;
+			linux,cma-default;
+		};
 	};
 };