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[31/39] ACPICA: Add new MADT GICC flags fields

Message ID E1qvJBA-00AqRq-QW@rmk-PC.armlinux.org.uk (mailing list archive)
State RFC, archived
Headers show
Series ACPI/arm64: add support for virtual cpuhotplug | expand

Commit Message

Russell King (Oracle) Oct. 24, 2023, 3:18 p.m. UTC 
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>
---
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(+)
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Patch

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) */