acpi: cpuhp: implement hot-remove parts of CPU hotplug interface

it adds hw registers needed for handling CPU hot-remove and
corresponding AML methods to request and eject a CPU with
necessary hotplug callbacks in pc,piix4,ich9 code.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/hw/acpi/cpu.h b/include/hw/acpi/cpu.h
index 55c3166c0f..f334221d85 100644
--- a/include/hw/acpi/cpu.h
+++ b/include/hw/acpi/cpu.h
@@ -21,6 +21,7 @@ typedef struct AcpiCpuStatus {
     struct CPUState *cpu;
     uint64_t arch_id;
     bool is_inserting;
+    bool is_removing;
 } AcpiCpuStatus;
 
 typedef struct CPUHotplugState {
@@ -34,6 +35,13 @@ typedef struct CPUHotplugState {
 void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev,
                       CPUHotplugState *cpu_st, DeviceState *dev, Error **errp);
 
+void acpi_cpu_unplug_request_cb(HotplugHandler *hotplug_dev,
+                                CPUHotplugState *cpu_st,
+                                DeviceState *dev, Error **errp);
+
+void acpi_cpu_unplug_cb(CPUHotplugState *cpu_st,
+                        DeviceState *dev, Error **errp);
+
 void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner,
                          CPUHotplugState *state, hwaddr base_addr);