diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index 7aee9fb3bd1f..83666cb3ec2c 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -783,6 +783,15 @@ struct acpi_iort_smmu {
 #define ACPI_IORT_SMMU_DVM_SUPPORTED    (1)
 #define ACPI_IORT_SMMU_COHERENT_WALK    (1<<1)
 
+/* Global interrupt format */
+
+struct acpi_iort_smmu_gsi {
+	u32 nsg_irpt;
+	u32 nsg_irpt_flags;
+	u32 nsg_cfg_irpt;
+	u32 nsg_cfg_irpt_flags;
+};
+
 struct acpi_iort_smmu_v3 {
 	u64 base_address;	/* SMMUv3 base address */
 	u32 flags;