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acpi/generic_event_device: add an APEI error device

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Adds a generic error device to handle generic hardware error
events as specified at ACPI 6.5 specification at 18.3.2.7.2:
https://uefi.org/specs/ACPI/6.5/18_Platform_Error_Interfaces.html#event-notification-for-generic-error-sources
using HID PNP0C33.

The PNP0C33 device is used to report hardware errors to
the guest via ACPI APEI Generic Hardware Error Source (GHES).

Co-authored-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Co-authored-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <2790f664c849d53de0ce3049fa8c7950c1de1f86.1758610789.git.mchehab+huawei@kernel.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2025-09-23 09:04:04 +02:00 • committed by Michael S. Tsirkin
parent f3f747ddcf
commit c498a36bcb
5 changed files with 27 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

10
hw/acpi/aml-build.c
View file

@ -2629,3 +2629,13 @@ Aml *aml_i2c_serial_bus_device(uint16_t address, const char *resource_source)
return var;
}
/* ACPI 5.0b: 18.3.2.6.2 Event Notification For Generic Error Sources */
Aml *aml_error_device(void)
{
Aml *dev = aml_device(ACPI_APEI_ERROR_DEVICE);
aml_append(dev, aml_name_decl("_HID", aml_string("PNP0C33")));
aml_append(dev, aml_name_decl("_UID", aml_int(0)));
return dev;
}

13
hw/acpi/generic_event_device.c
View file

@ -30,6 +30,7 @@ static const uint32_t ged_supported_events[] = {
ACPI_GED_NVDIMM_HOTPLUG_EVT,
ACPI_GED_CPU_HOTPLUG_EVT,
ACPI_GED_PCI_HOTPLUG_EVT,
ACPI_GED_ERROR_EVT,
};
/*
@ -120,6 +121,16 @@ void build_ged_aml(Aml *table, const char *name, HotplugHandler *hotplug_dev,
aml_notify(aml_name(ACPI_POWER_BUTTON_DEVICE),
aml_int(0x80)));
break;
case ACPI_GED_ERROR_EVT:
/*
* ACPI 5.0b: 5.6.6 Device Object Notifications
* Table 5-135 Error Device Notification Values
* Defines 0x80 as the value to be used on notifications
*/
aml_append(if_ctx,
aml_notify(aml_name(ACPI_APEI_ERROR_DEVICE),
aml_int(0x80)));
break;
case ACPI_GED_NVDIMM_HOTPLUG_EVT:
aml_append(if_ctx,
aml_notify(aml_name("\\_SB.NVDR"),
@ -320,6 +331,8 @@ static void acpi_ged_send_event(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
sel = ACPI_GED_MEM_HOTPLUG_EVT;
} else if (ev & ACPI_POWER_DOWN_STATUS) {
sel = ACPI_GED_PWR_DOWN_EVT;
} else if (ev & ACPI_GENERIC_ERROR) {
sel = ACPI_GED_ERROR_EVT;
} else if (ev & ACPI_NVDIMM_HOTPLUG_STATUS) {
sel = ACPI_GED_NVDIMM_HOTPLUG_EVT;
} else if (ev & ACPI_CPU_HOTPLUG_STATUS) {

1
include/hw/acpi/acpi_dev_interface.h
View file

@ -13,6 +13,7 @@ typedef enum {
ACPI_NVDIMM_HOTPLUG_STATUS = 16,
ACPI_VMGENID_CHANGE_STATUS = 32,
ACPI_POWER_DOWN_STATUS = 64,
ACPI_GENERIC_ERROR = 128,
} AcpiEventStatusBits;
#define TYPE_ACPI_DEVICE_IF "acpi-device-interface"

2
include/hw/acpi/aml-build.h
View file

@ -252,6 +252,7 @@ struct CrsRangeSet {
/* Consumer/Producer */
#define AML_SERIAL_BUS_FLAG_CONSUME_ONLY (1 << 1)
#define ACPI_APEI_ERROR_DEVICE "GEDD"
/**
* init_aml_allocator:
*
@ -382,6 +383,7 @@ Aml *aml_dma(AmlDmaType typ, AmlDmaBusMaster bm, AmlTransferSize sz,
uint8_t channel);
Aml *aml_sleep(uint64_t msec);
Aml *aml_i2c_serial_bus_device(uint16_t address, const char *resource_source);
Aml *aml_error_device(void);
/* Block AML object primitives */
Aml *aml_scope(const char *name_format, ...) G_GNUC_PRINTF(1, 2);

1
include/hw/acpi/generic_event_device.h
View file

@ -103,6 +103,7 @@ OBJECT_DECLARE_TYPE(AcpiGedState, AcpiGedClass, ACPI_GED)
#define ACPI_GED_NVDIMM_HOTPLUG_EVT 0x4
#define ACPI_GED_CPU_HOTPLUG_EVT 0x8
#define ACPI_GED_PCI_HOTPLUG_EVT 0x10
#define ACPI_GED_ERROR_EVT 0x20
typedef struct GEDState {
MemoryRegion evt;