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hw/acpi: Update ACPI GED framework to support vCPU Hotplug

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ACPI GED (as described in the ACPI 6.4 spec) uses an interrupt listed in the
_CRS object of GED to intimate OSPM about an event. Later then demultiplexes the
notified event by evaluating ACPI _EVT method to know the type of event. Use
ACPI GED to also notify the guest kernel about any CPU hot(un)plug events.

Note, GED interface is used by many hotplug events like memory hotplug, NVDIMM
hotplug and non-hotplug events like system power down event. Each of these can
be selected using a bit in the 32 bit GED IO interface. A bit has been reserved
for the CPU hotplug event.

ACPI CPU hotplug related initialization should only happen if ACPI_CPU_HOTPLUG
support has been enabled for particular architecture. Add cpu_hotplug_hw_init()
stub to avoid compilation break.

Co-developed-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Shaoqin Huang <shahuang@redhat.com>
Tested-by: Vishnu Pajjuri <vishnu@os.amperecomputing.com>
Tested-by: Xianglai Li <lixianglai@loongson.cn>
Tested-by: Miguel Luis <miguel.luis@oracle.com>
Reviewed-by: Vishnu Pajjuri <vishnu@os.amperecomputing.com>
Tested-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Message-Id: <20240716111502.202344-4-salil.mehta@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
This commit is contained in:
Salil Mehta 2024-07-16 12:14:58 +01:00 • committed by Michael S. Tsirkin
parent 2f1a85daf3
commit 06f1f4958b
4 changed files with 59 additions and 1 deletions
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4
include/hw/acpi/generic_event_device.h
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@ -62,6 +62,7 @@
#include "hw/sysbus.h"
#include "hw/acpi/memory_hotplug.h"
#include "hw/acpi/ghes.h"
#include "hw/acpi/cpu.h"
#include "qom/object.h"
#define ACPI_POWER_BUTTON_DEVICE "PWRB"
@ -95,6 +96,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(AcpiGedState, ACPI_GED)
#define ACPI_GED_MEM_HOTPLUG_EVT 0x1
#define ACPI_GED_PWR_DOWN_EVT 0x2
#define ACPI_GED_NVDIMM_HOTPLUG_EVT 0x4
#define ACPI_GED_CPU_HOTPLUG_EVT 0x8
typedef struct GEDState {
MemoryRegion evt;
@ -106,6 +108,8 @@ struct AcpiGedState {
SysBusDevice parent_obj;
MemHotplugState memhp_state;
MemoryRegion container_memhp;
CPUHotplugState cpuhp_state;
MemoryRegion container_cpuhp;
GEDState ged_state;
uint32_t ged_event_bitmap;
qemu_irq irq;