Advanced Configuration and Power Interface Specification

ACPI Platform Error Interfaces (APEI)
Field
Byte
length
Byte
offset
Description
OEM Table ID 8 16 The manufacturer model ID.
OEM Revision 4 24 OEM revision of the HEST for the supplied OEM table ID.
Creator ID 4 28 Vendor ID of the utility that created the table.
Creator Revision 4 32 Revision of the utility that created the table.
Error Source Count 4 36 The number of error source descriptors.
Error Source Structure[n] - 40 A series of Error Source Descriptor Entries.
The following sections detail each of the specific error source descriptors.
Note: Error source types 3, 4, and 5 are reserved for legacy reasons and must not be used.
18.3.2.1 IA-32 Architecture Machine Check Exception
Processors implementing the IA-32 Instruction Set Architecture employ a machine check exception
mechanism to alert OSPM to the presence of an uncorrected hardware error condition. The
information in this table is used by OSPM to configure the machine check exception mechanism for
each processor in the system.
Only one entry of this type is permitted in the HEST. OSPM applies the information specified in this
entry to all processors.
Table 18-322 IA-32 Architecture Machine Check Exception Structure
Field
Byte
Length
Byte
Offset
Description
Type 2 0 0 – IA-32 Architecture Machine Check Exception Structure.
Source Id 2 2 This value serves to uniquely identify this error source against
other error sources reported by the platform.
Reserved 2 4 Reserved.
Flags 1 6 Bit [0] - FIRMWARE_FIRST: If set, this bit indicates to the
OSPM that system firmware will handle errors from this
source first.
All other bits are reserved.
Enabled 1 7 Specifies whether MCE is to be enabled. If set to 1, this field
indicates this error source is to be enabled. If set to 0, this
field indicates that the error source is not to be enabled.
Number of Records
To Pre-allocate
Max Sections Per
Record
Global Capability Init
Data
Global Control Init
Data
4 8 Indicates the number of error records to pre-allocate for this
error source.
4 12 Indicates the maximum number of error sections included in
an error record created as a result of an error reported by this
error source.
8 16 Indicates the value of the machine check global capability
register.
8 24 Indicates the value to be written to the machine check global
control register.
Version 6.0 717