diff options
| author | Salil Mehta <salil.mehta@huawei.com> | 2024-07-16 12:14:59 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-07-22 20:15:41 -0400 |
| commit | 549c9a9dcbc1592ea79496f7b3ab234f366adeba (patch) | |
| tree | 8dd5dd3ba23bdbee1fe35a59d414b04afdb3f8ca /include/hw/acpi | |
| parent | 06f1f4958be70f14f527d1f03d1e9a141650bbc5 (diff) | |
hw/acpi: Update GED _EVT method AML with CPU scan
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. Update the GED AML _EVT
method with the call to method \\_SB.CPUS.CSCN (via \\_SB.GED.CSCN)
Architecture specific code [1] might initialize its CPUs AML code by calling
common function build_cpus_aml() like below for ARM:
build_cpus_aml(scope, ms, opts, xx_madt_cpu_entry, memmap[VIRT_CPUHP_ACPI].base,
"\\_SB", "\\_SB.GED.CSCN", AML_SYSTEM_MEMORY);
[1] https://lore.kernel.org/qemu-devel/20240613233639.202896-13-salil.mehta@huawei.com/
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>
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: Shaoqin Huang <shahuang@redhat.com>
Tested-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20240716111502.202344-5-salil.mehta@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/hw/acpi')
| -rw-r--r-- | include/hw/acpi/generic_event_device.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/hw/acpi/generic_event_device.h b/include/hw/acpi/generic_event_device.h index e091ac2108..40af3550b5 100644 --- a/include/hw/acpi/generic_event_device.h +++ b/include/hw/acpi/generic_event_device.h @@ -87,6 +87,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(AcpiGedState, ACPI_GED) #define GED_DEVICE "GED" #define AML_GED_EVT_REG "EREG" #define AML_GED_EVT_SEL "ESEL" +#define AML_GED_EVT_CPU_SCAN_METHOD "\\_SB.GED.CSCN" /* * Platforms need to specify the GED event bitmap |