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x86: acpi: let the firmware handle pending "CPU remove" events in SMM

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if firmware and QEMU negotiated CPU hotunplug support, generate
_EJ0 method so that it will mark CPU for removal by firmware and
pass control to it by triggering SMI.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20201207140739.3829993-6-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 09:07:36 -05:00 • committed by Michael S. Tsirkin
parent 414aa64fda
commit 69dea9d6b3
3 changed files with 14 additions and 2 deletions
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1
include/hw/acpi/cpu.h
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@ -51,6 +51,7 @@ void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner,
typedef struct CPUHotplugFeatures {
bool acpi_1_compatible;
bool has_legacy_cphp;
bool fw_unplugs_cpu;
const char *smi_path;
} CPUHotplugFeatures;