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acpi: cpuhp: introduce 'firmware performs eject' status/control bits

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Adds bit #4 to status/control field of CPU hotplug MMIO interface.
New bit will be used OSPM to mark CPUs as pending for removal by firmware,
when it calls _EJ0 method on CPU device node. Later on, when firmware
sees this bit set, it will perform CPU eject which will clear bit #4
as well.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20201207140739.3829993-3-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2020-12-07 09:07:33 -05:00 • committed by Michael S. Tsirkin
parent 0657c657eb
commit 1e6107d901
4 changed files with 28 additions and 6 deletions
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1
include/hw/acpi/cpu.h
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@ -22,6 +22,7 @@ typedef struct AcpiCpuStatus {
uint64_t arch_id;
bool is_inserting;
bool is_removing;
bool fw_remove;
uint32_t ost_event;
uint32_t ost_status;
} AcpiCpuStatus;