linux-kernel - [PATCH v1 15/26] ACPICA: Add Arm IORT IWB node definitions

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Message-ID: <2691130.Lt9SDvczpP@rafael.j.wysocki>
Date: Wed, 14 Jan 2026 13:29:59 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Linux ACPI <linux-acpi@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
 "Dumbre, Saket" <saket.dumbre@...el.com>
Subject: [PATCH v1 15/26] ACPICA: Add Arm IORT IWB node definitions

From: Jose Marinho <jose.marinho@....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/a90dc2f5380c
Signed-off-by: Jose Marinho <jose.marinho@....com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 include/acpi/actbl2.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index 05ce897f1eeb..01dc35e4b60a 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -682,6 +682,7 @@ 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 {
@@ -860,6 +861,12 @@ 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 */
+};
+
 /*******************************************************************************
  *
  * IOVT - I/O Virtualization Table
-- 
2.51.0