Smm.h File Reference

Headers relating to operations related to System Management Mode (SMM). More...

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Macros
#define	SMI_TRIGGER_POWER_VALUE   0x80
	SMI trigger port value.

Functions
BOOLEAN	SmmPerformSmiOperation (SMI_OPERATION_PACKETS *SmiOperationRequest, BOOLEAN ApplyFromVmxRootMode)
	Perform actions related to System Management Interrupts (SMIs).

Detailed Description

Headers relating to operations related to System Management Mode (SMM).

Author

Sina Karvandi (sina@.nosp@m.hype.nosp@m.rdbg..nosp@m.org)

Version

0.15

Date

2025-08-02

Copyright

This project is released under the GNU Public License v3.

Macro Definition Documentation

SMI_TRIGGER_POWER_VALUE

#define SMI_TRIGGER_POWER_VALUE   0x80

SMI trigger port value.

Function Documentation

SmmPerformSmiOperation()

BOOLEAN SmmPerformSmiOperation	(	SMI_OPERATION_PACKETS *	SmiOperationRequest,
		BOOLEAN	ApplyFromVmxRootMode )

Perform actions related to System Management Interrupts (SMIs).

Parameters

SmiOperationRequest
ApplyFromVmxRootMode

Returns

BOOLEAN

{
    BOOLEAN Status = FALSE;
 
    UNREFERENCED_PARAMETER(ApplyFromVmxRootMode);
 
    //
    // Check the SMI operation type and perform the corresponding action
    //
    switch (SmiOperationRequest->SmiOperationType)
    {
    case SMI_OPERATION_REQUEST_TYPE_READ_COUNT:
 
        //
        // Read the SMI count from the MSR
        //
        SmiOperationRequest->SmiCount = SmmReadSmiCount();
 
        Status = TRUE;
        break;
 
    case SMI_OPERATION_REQUEST_TYPE_TRIGGER_POWER_SMI:
 
        if (SmmTriggerPowerSmi())
        {
            //
            // If the SMI was triggered successfully
            //
            Status = TRUE;
        }
        else
        {
            //
            // If the SMI was not triggered successfully, set error status
            //
            SmiOperationRequest->KernelStatus = DEBUGGER_ERROR_UNABLE_TO_TRIGGER_SMI;
        }
 
        break;
 
    default:
 
        Status                            = FALSE;
        SmiOperationRequest->KernelStatus = DEBUGGER_ERROR_INVALID_SMI_OPERATION_PARAMETERS;
 
        break;
    }
 
    //
    // Set the status of the SMI operation request
    //
    if (Status)
    {
        SmiOperationRequest->KernelStatus = DEBUGGER_OPERATION_WAS_SUCCESSFUL;
    }
 
    return Status;
}