linux-kernel - [PATCH v3 4/5] ACPICA: Add new MADT GICC/GICR/ITS flags handling [code first]

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Date:   Fri,  6 Oct 2023 14:59:28 +0200
From:   Lorenzo Pieralisi <lpieralisi@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Lorenzo Pieralisi <lpieralisi@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-acpi@...r.kernel.org, Mark Rutland <mark.rutland@....com>,
        Robin Murphy <robin.murphy@....com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Fang Xiang <fangxiang3@...omi.com>,
        Marc Zyngier <maz@...nel.org>
Subject: [PATCH v3 4/5] ACPICA: Add new MADT GICC/GICR/ITS flags handling [code first]

Add new flags and related fields to the MADT GICC/GICR/ITS
structures according to the code first ECR:

https://bugzilla.tianocore.org/show_bug.cgi?id=4557

Temporary code waiting for ECR approval, for testing
purpose only - eventually ACPICA changes will trickle
into the kernel from the ACPICA project repos.

Signed-off-by: Lorenzo Pieralisi <lpieralisi@...nel.org>
---
 include/acpi/actbl2.h | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index 3751ae69432f..dd44915efd6b 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -1046,6 +1046,7 @@ struct acpi_madt_generic_interrupt {
 /* ACPI_MADT_ENABLED                    (1)      Processor is usable if set */
 #define ACPI_MADT_PERFORMANCE_IRQ_MODE  (1<<1)	/* 01: Performance Interrupt Mode */
 #define ACPI_MADT_VGIC_IRQ_MODE         (1<<2)	/* 02: VGIC Maintenance Interrupt mode */
+#define ACPI_MADT_GICC_NON_COHERENT     (1<<4)  /* 04: GIC redistributor is not coherent */
 
 /* 12: Generic Distributor (ACPI 5.0 + ACPI 6.0 changes) */
 
@@ -1090,21 +1091,27 @@ struct acpi_madt_generic_msi_frame {
 
 struct acpi_madt_generic_redistributor {
 	struct acpi_subtable_header header;
-	u16 reserved;		/* reserved - must be zero */
+	u8 flags;
+	u8 reserved;		/* reserved - must be zero */
 	u64 base_address;
 	u32 length;
 };
 
+#define ACPI_MADT_GICR_NON_COHERENT   (1)
+
 /* 15: Generic Translator (ACPI 6.0) */
 
 struct acpi_madt_generic_translator {
 	struct acpi_subtable_header header;
-	u16 reserved;		/* reserved - must be zero */
+	u8 flags;
+	u8 reserved;		/* reserved - must be zero */
 	u32 translation_id;
 	u64 base_address;
 	u32 reserved2;
 };
 
+#define ACPI_MADT_ITS_NON_COHERENT   (1)
+
 /* 16: Multiprocessor wakeup (ACPI 6.4) */
 
 struct acpi_madt_multiproc_wakeup {
-- 
2.34.1