Re: [PATCH V5 4/9] hw/acpi: Init GED framework with CPU hotplug events

[Shaoqin Huang <shahuang@redhat.com>]

On 10/12/23 03:43, Salil Mehta via wrote:
> ACPI GED(as described in the ACPI 6.2 spec) can be used to generate ACPI events
> when OSPM/guest receives an interrupt listed in the _CRS object of GED. OSPM
> then maps or demultiplexes the event by evaluating _EVT method.
> 
> This change adds the support of CPU hotplug event initialization in the
> existing GED framework.
> 
> 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>
> Tested-by: Vishnu Pajjuri <vishnu@os.amperecomputing.com>
Reviewed-by: Shaoqin Huang <shahuang@redhat.com>
> ---
>   hw/acpi/generic_event_device.c         | 8 ++++++++
>   include/hw/acpi/generic_event_device.h | 5 +++++
>   2 files changed, 13 insertions(+)
> 
> diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
> index a3d31631fe..d2fa1d0e4a 100644
> --- a/hw/acpi/generic_event_device.c
> +++ b/hw/acpi/generic_event_device.c
> @@ -25,6 +25,7 @@ static const uint32_t ged_supported_events[] = {
>       ACPI_GED_MEM_HOTPLUG_EVT,
>       ACPI_GED_PWR_DOWN_EVT,
>       ACPI_GED_NVDIMM_HOTPLUG_EVT,
> +    ACPI_GED_CPU_HOTPLUG_EVT,
>   };
>   
>   /*
> @@ -400,6 +401,13 @@ static void acpi_ged_initfn(Object *obj)
>       memory_region_init_io(&ged_st->regs, obj, &ged_regs_ops, ged_st,
>                             TYPE_ACPI_GED "-regs", ACPI_GED_REG_COUNT);
>       sysbus_init_mmio(sbd, &ged_st->regs);
> +
> +    s->cpuhp.device = OBJECT(s);
> +    memory_region_init(&s->container_cpuhp, OBJECT(dev), "cpuhp container",
> +                       ACPI_CPU_HOTPLUG_REG_LEN);
> +    sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->container_cpuhp);
> +    cpu_hotplug_hw_init(&s->container_cpuhp, OBJECT(dev),
> +                        &s->cpuhp_state, 0);
>   }
>   
>   static void acpi_ged_class_init(ObjectClass *class, void *data)
> diff --git a/include/hw/acpi/generic_event_device.h b/include/hw/acpi/generic_event_device.h
> index d831bbd889..d0a5a43abf 100644
> --- a/include/hw/acpi/generic_event_device.h
> +++ b/include/hw/acpi/generic_event_device.h
> @@ -60,6 +60,7 @@
>   #define HW_ACPI_GENERIC_EVENT_DEVICE_H
>   
>   #include "hw/sysbus.h"
> +#include "hw/acpi/cpu_hotplug.h"
>   #include "hw/acpi/memory_hotplug.h"
>   #include "hw/acpi/ghes.h"
>   #include "qom/object.h"
> @@ -97,6 +98,7 @@ 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;
> @@ -108,6 +110,9 @@ struct AcpiGedState {
>       SysBusDevice parent_obj;
>       MemHotplugState memhp_state;
>       MemoryRegion container_memhp;
> +    CPUHotplugState cpuhp_state;
> +    MemoryRegion container_cpuhp;
> +    AcpiCpuHotplug cpuhp;
>       GEDState ged_state;
>       uint32_t ged_event_bitmap;
>       qemu_irq irq;

-- 
Shaoqin