OSPM evaluates _EVT method to map the event. The cpu hotplug event eventually results in start of the cpu scan. Scan figures out the cpu and the kind of event(plug/unplug) and notifies it back to the guest.
The change in this patch updates the GED AML _EVT method with the call to \\_SB.CPUS.CSCN which will do above. Co-developed-by: Keqian Zhu <zhukeqi...@huawei.com> Signed-off-by: Salil Mehta <salil.me...@huawei.com> --- hw/acpi/generic_event_device.c | 4 ++++ include/hw/acpi/cpu_hotplug.h | 3 +++ 2 files changed, 7 insertions(+) diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c index 0f2c8a959e..79177deda2 100644 --- a/hw/acpi/generic_event_device.c +++ b/hw/acpi/generic_event_device.c @@ -108,6 +108,10 @@ void build_ged_aml(Aml *table, const char *name, HotplugHandler *hotplug_dev, aml_append(if_ctx, aml_call0(MEMORY_DEVICES_CONTAINER "." MEMORY_SLOT_SCAN_METHOD)); break; + case ACPI_GED_CPU_HOTPLUG_EVT: + aml_append(if_ctx, aml_call0(ACPI_CPU_CONTAINER "." + ACPI_CPU_SCAN_METHOD)); + break; case ACPI_GED_PWR_DOWN_EVT: aml_append(if_ctx, aml_notify(aml_name(ACPI_POWER_BUTTON_DEVICE), diff --git a/include/hw/acpi/cpu_hotplug.h b/include/hw/acpi/cpu_hotplug.h index 48b291e45e..f47fc8e79b 100644 --- a/include/hw/acpi/cpu_hotplug.h +++ b/include/hw/acpi/cpu_hotplug.h @@ -20,6 +20,9 @@ #include "hw/acpi/cpu.h" #define ACPI_CPU_HOTPLUG_REG_LEN 12 +#define ACPI_CPU_SCAN_METHOD "CSCN" +#define ACPI_CPU_CONTAINER "\\_SB.CPUS" + typedef struct AcpiCpuHotplug { Object *device; -- 2.17.1