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From:   Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
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Cc:     Salil Mehta <salil.mehta@huawei.com>,
        Jean-Philippe Brucker <jean-philippe@linaro.org>,
        jianyong.wu@arm.com, justin.he@arm.com,
        James Morse <james.morse@arm.com>
Subject: [PATCH RFC v3 13/21] ACPICA: Add new MADT GICC flags fields
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Sender: Russell King <rmk@armlinux.org.uk>
Date:   Wed, 13 Dec 2023 12:50:18 +0000
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From: James Morse <james.morse@arm.com>

Add the new flag field to the MADT's GICC structure.

'Online Capable' indicates a disabled CPU can be enabled later. See
ACPI specification 6.5 Tabel 5.37: GICC CPU Interface Flags.

Signed-off-by: James Morse <james.morse@arm.com>
Tested-by: Miguel Luis <miguel.luis@oracle.com>
Tested-by: Vishnu Pajjuri <vishnu@os.amperecomputing.com>
Tested-by: Jianyong Wu <jianyong.wu@arm.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
This patch probably needs to go via the upstream acpica project,
but is included here so the feature can be tested.

If the ACPICA header files are updated before merging this patch set,
this patch will need to be dropped.

Changes since RFC v2:
 * Add ACPI specification reference.
---
 include/acpi/actbl2.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index 3751ae69432f..c433a079d8e1 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_CPU_CAPABLE      (1<<3)	/* 03: CPU is online capable */
 
 /* 12: Generic Distributor (ACPI 5.0 + ACPI 6.0 changes) */
 
-- 
2.30.2