linux-kernel - [PATCH not for merging 2/7] ACPICA: Add Arm IORT IWB node definitions

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Message-Id: <20251028-gicv5-host-acpi-v1-2-01a862feb5ca@kernel.org>
Date: Tue, 28 Oct 2025 11:19:00 +0100
From: Lorenzo Pieralisi <lpieralisi@...nel.org>
To: "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>, 
 Robert Moore <robert.moore@...el.com>, Thomas Gleixner <tglx@...utronix.de>, 
 Hanjun Guo <guohanjun@...wei.com>, Sudeep Holla <sudeep.holla@....com>, 
 Marc Zyngier <maz@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>
Cc: linux-acpi@...r.kernel.org, acpica-devel@...ts.linux.dev, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-pci@...r.kernel.org, Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Jose Marinho <jose.marinho@....com>
Subject: [PATCH not for merging 2/7] ACPICA: Add Arm IORT IWB node
 definitions

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

ACPICA commit d68693b24e5235a7da4d57e690d3c13380c14c16

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/d68693b2
Signed-off-by: Jose Marinho <jose.marinho@....com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@...nel.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