[PATCH v2 2/7] ACPICA: Add Arm IORT IWB node definitions

Lorenzo Pieralisi
2025-12-18T10:15:14Z

From: Jose Marinho <jose.marinho@arm.com>

The IORT IUWB node is defined in IORT issue E.g
See https://developer.arm.com/documentation/den0049/eg

Link: https://github.com/acpica/acpica/commit/a90dc2f5
Signed-off-by: Jose Marinho <jose.marinho@arm.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
---
include/acpi/actbl2.h | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index fdabc6c64a9c..ba1a36d23e32 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -680,6 +680,7 @@ enum acpi_iort_node_type {
ACPI_IORT_NODE_SMMU_V3 = 0x04,
ACPI_IORT_NODE_PMCG = 0x05,
ACPI_IORT_NODE_RMR = 0x06,
+ ACPI_IORT_NODE_IWB = 0x07,
};

struct acpi_iort_id_mapping {
@@ -858,6 +859,12 @@ struct acpi_iort_rmr_desc {
u32 reserved;
};

+struct acpi_iort_iwb {
+ u64 base_address;
+ u16 iwb_index; /* Unique IWB identifier matching with the IWB GSI namespace. */
+ char device_name[]; /* Path of the IWB namespace object */
+};
+
/*******************************************************************************
*
* IVRS - I/O Virtualization Reporting Structure

--
2.50.1