Bugzilla: 3706 'Code First - MADT GICC new flags'
On ARM systems physical CPU hotplug is not supported.
All CPUs are considered present and this is true
throughout the system uptime.
The ECR 2285 introduces a new 'online-capable' flag
in the GICC structure flags in ACPI 6.5, to signal
firmware policy (CPU is not enabled but it can be
enabled and onlined). This enables OSPM to support
virtual CPU hotplug (on virtual platforms for
instance).
This ECR also updates the MADT table revision to 6
to reflect the ACPI 6.5 changes. Therefore, update
the MADT table revision to match the value as
specified in ACPI 6.5.
Signed-off-by: Sami Mujawar <sami.muja...@arm.com>
---
MdePkg/Include/IndustryStandard/Acpi65.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/MdePkg/Include/IndustryStandard/Acpi65.h
b/MdePkg/Include/IndustryStandard/Acpi65.h
index
6caadf2404984aa472f748293b8e80dd120f280c..9e2828bc048bcd9b2bf0529d00bdaf8bf04bf543
100644
--- a/MdePkg/Include/IndustryStandard/Acpi65.h
+++ b/MdePkg/Include/IndustryStandard/Acpi65.h
@@ -2,7 +2,7 @@
ACPI 6.5 definitions from the ACPI Specification Revision 6.5 Aug, 2022.
Copyright (c) 2017 - 2022, Intel Corporation. All rights reserved.<BR>
- Copyright (c) 2019 - 2021, ARM Ltd. All rights reserved.<BR>
+ Copyright (c) 2019 - 2023, ARM Ltd. All rights reserved.<BR>
Copyright (c) 2023, Loongson Technology Corporation Limited. All rights
reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -533,6 +533,7 @@ typedef struct {
#define EFI_ACPI_6_5_GIC_ENABLED BIT0
#define EFI_ACPI_6_5_PERFORMANCE_INTERRUPT_MODEL BIT1
#define EFI_ACPI_6_5_VGIC_MAINTENANCE_INTERRUPT_MODE_FLAGS BIT2
+#define EFI_ACPI_6_5_GIC_ONLINE_CAPABLE BIT3
///
/// GIC Distributor Structure
--
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'
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