SIGNAL_REG_VALUE structure (ntddk.h)

The SIGNAL_REG_VALUE structure represents a RAS (Reliability, Availability, and Serviceability) signal register entry that contains register name, MSR address, and value information.

Syntax

typedef struct _SIGNAL_REG_VALUE {
  UINT8  RegName[WCS_RAS_REGISTER_NAME_MAX_LENGTH];
  UINT32 MsrAddr;
  UINT64 Value;
} SIGNAL_REG_VALUE, *PSIGNAL_REG_VALUE;

Members

RegName[WCS_RAS_REGISTER_NAME_MAX_LENGTH]

A UINT8 array that contains the name of the RAS register. The maximum length is defined by WCS_RAS_REGISTER_NAME_MAX_LENGTH.

MsrAddr

A UINT32 value that specifies the Model Specific Register (MSR) address for this RAS signal register.

Value

A UINT64 value that contains the current value stored in the RAS signal register.

Remarks

This structure is used as part of the EFI ACPI RAS Signal Table for hardware error reporting and signaling mechanisms.

It's used as an array element within the EFI_ACPI_RAS_SIGNAL_TABLE structure. Each entry represents a specific RAS signal register that can be monitored for hardware error conditions.

This structure is primarily used by the Windows Hardware Error Architecture (WHEA) subsystem for logging RAS table entries through ETW (Event Tracing for Windows) events. The structure allows the system to track and report on specific hardware registers that are relevant for reliability and error detection.

When multiple SIGNAL_REG_VALUE entries need to be logged, they may be split across multiple ETW events if the total size exceeds the maximum event size limit.

Requirements

See also

EFI_ACPI_RAS_SIGNAL_TABLE